• Introduction to hot-stamping process Jan 06, 2023
    Hot stamping The raw material for cosmetics packaging is mostly plastic. In order to show the metal texture of the packaging itself or improve the grade, it is also often used to obtain consumers' recognition of texture and taste through hot-stamp. It is commonly used for hot-stamping on the edge or LOGO, which is common in cosmetics, skin care and other product packaging. With the development of hot-stamp, various customized patterns or special textures of hot-stamp also came into being. Introduction to hot-stamping process The basic hot-stamping process is to heat the anodized aluminum under the pressure. When the anodized aluminum is pressed by the hot stamping plate or the substrate, the hot-melt silicone resin layer on the anodized aluminum been melted. At this time, the viscosity of the hot melt silicone resin becomes smaller, while the viscosity of the special thermosensitive adhesive increases, so the aluminum layer and the anodized base film peel off and transfer to the substrate at the same time. As the pressure is removed, the adhesive cools and solidifies rapidly, so the aluminum layer is firmly attached to the substrate, a hot stamping process has completed. Hot stamping has two main functions: first, surface decoration, which can improve the added value of the product. The combination of gold stamping and other processing methods such as concave convex process can show a strong decorative effect of the product; The second is to endow the product with high anti-counterfeiting performance, such as the use of holographic positioning hot stamping trademark logo. Features of hot stamping As a widely used secondary process, hot stamping also has its unique characteristics: 1. Little impact on the environment and low energy consumption (high conversion rate of electric energy to thermal energy and less mechanical energy loss); 2. Low requirements on the site and flexible operation, and can be connected with molding, printing and assembly according to needs; 3. With high customization freedom, you can customize the appearance effects (such as gold foil or transfer film with special effects) according to different customer needs; 4. Most of the stamping operations are mechanical operations, which can relatively easily realize efficient automated integrated workstations. (Automatic hot stamping machine) Material Needs of Hot-Stamping Process Hot-Stamping Mold Hot-stamping mold includes zinc mild, steel mold, copper etching mold, silica gel mold and plastic mold. The requirements of the hot-stamping mold is to be able to resist high temperature, high pressure and deformation. As the hardness of zinc is far lower than other materials, products with high hardness and large output do not choose this material. The advantage of zinc hot-stamping mold is easy to produce and cheap. Copper hot-stamping mold can resist high temperature and high pressure, but it is not easy to etch, especially in corners. Due to different materials, the heat exchange rate is also different. The most popular materials are silica gel and aluminum. The heat resistance temperature of silica gel is between 250 ℃ and 350 ℃ (the temperature between the bronzing plate and the parts is usually kept between 80 ℃ and 180 ℃) (Silica gel hot-stamping mold) (Etching hot-stamping mold) (Copper hot-stamping mold) (Copper engraving hot-stamping mold) Silica gel hot-stamping mold: It is used for lines decoration of product. The recommended range of processing temperature for silica gel plate is 250 ℃ - 300 ℃ (silica gel is easy to harden and shorten service life if it exceeds 350 ℃, and it is usually appropriate to set it at about 250 ℃).   Etching hot-stamping mold: Used for special patterns, characters, lines, patterns and other hot decoration.   Copper hot-stamping mold: For products requiring obvious concavity and convexity for hot finishing, the range of copper plate processing temperature is 100 ℃ - 200 ℃.   Copper engraving hot-stamping mold: Used for hot decoration of products with curved or irregular surfaces.   (2) Hot stamping foil (anodized aluminum foil) The hot stamping process is based on the principle of hot press transfer. For example, hot anodizing transfers the aluminum layer in the anodized aluminum to the substrate surface to form a special metal effect. Electrochemical aluminum foil is usually composed of multi-layer materials, and the base material is usually PE, followed by separation coating, color coating, metal coating (aluminum plating) and glue coating. 1. The appropriate hot stamping foil must be selected according to the different materials of the hot objects. During hot stamping, it is necessary to master the three-way cooperation of temperature, pressure and hot stamping speed (or time), and make differences according to different hot stamping materials and areas. 2. The speed and direction of the turning knife shall be mastered when cutting the hot foil. 3. The anodized hot stamping foil shall be made of paper, ink (especially black ink) and composite glue with appropriate properties. The hot stamping parts must be kept dry to avoid oxidation or damage to the hot stamping layer. 4. The general package is 64cm × One 120m roll, one box for every 10 rolls; Large rolls with a width of 64cm and a length of 120m or 360m or other special specifications (1.5m wide, 1000m or 3000m long) can be customized. 5. Store in a cool and ventilated place. Note: If the color of the gold foil is silver, generally the gold foil has only four layers (the anodized layer itself is silver). The thickness of most recommended gold foils is 0.012mm and 0.016mm. If there are other three-dimensional effects, there will be 5-6 layers, and the extra layer is the effect layer. Common gold foil colors are: gold, silver, black, red, etc. (Example of foil color) There are some differences between the transfer film and the anodized aluminum foil. The special transfer film sometimes requires special treatment or hot stamping conditions, which shall be adjusted according to the actual situation.  
  • Why do you need to customize the makeup palette? Feb 11, 2023
    Why do you need to customize the makeup palette? With all kinds of cosmetics entering the fashion market, how do you distinguish yourself from others? Custom color palette is absolutely your first choice, because it allows you to use its unique appearance to attract attention, and its unique characteristics make you a market leader. Custom color palettes can provide perfect packaging solutions for all your needs, while maintaining true top-level display. Colorich has a professional design team In addition to your company's business logo, there are also product features highlighted in the color palette, so anyone who gets it will remember your product for a long time. We will use the latest printing technology and design with excellent color combinations. So your product will immediately attract onlookers. If you do not consider the planning idea, we will provide you with a large number of unique designs, including slogans, solutions and personnel, so that you can choose the best ready-made options. We can even help you develop the ideal commercial logo for your personal cosmetics products. Please talk to your customer service immediately and start designing the cosmetics palette.It is not only suitable for ideal customized cosmetic plates, but also important to find excellent suppliers Find excellent suppliers For more than ten years, Colorich Packaging has been providing services for foreign cosmetics brands. We have a team composed of professional customer service personnel, who have received the training of packaging professionals and can listen to and understand the personal needs of customers. For the convenience of our respected customers, we only charge wholesale price regardless of the size of your cosmetic paper packaging order. In addition, there is no minimum order requirement, which means that you can customize one color palette and 50100, 1000 color palettes. You can call+86-1887605661, or you can send email to: , we may become your perfect choice.
  • Do you know what is injection molding process? Mar 04, 2023
    Do you know what is injection molding process? Injection molding process refers to the process of making semi-finished products of a certain shape from molten raw materials through pressurization, injection, cooling, separation and other operations. This process is the production source of cosmetics packaging company's products. The quality of the semi-finished product determines the stability of the subsequent process and the quality of the product, and is the key process to maximize the profit of the enterprise.   (Injection mold) Over the years, injection molding workers have overcome one difficulty after another, especially in solving the common defects (such as product shrinkage, melt, water, bubbles, bright spots, deformation, etc.) in thin and thick wall products. In general, the injection molding process mainly solves the following two problems: 1、 Process The injection process includes four stages: filling, pressure maintaining, cooling (material storage) and Demolding. These four stages directly determine the molding quality of products, and these four stages are a complete continuous process.   (Injection molding process) (1) Filling stage Filling is the first step in the whole injection cycle. The time starts from the closing of the mold and the beginning of injection, and ends at about 95% of the filling of the mold cavity. In theory, the shorter the filling time, the higher the molding efficiency. But in practice, the molding time or injection speed are subject to many conditions, especially in thick-wall products. High-speed filling: when filling at high speed, the shear rate is high, and the viscosity of plastic decreases due to the effect of shear thinning, which reduces the overall flow resistance; The local viscous heating effect will also make the curing layer thinner. Therefore, in the flow control stage, the filling method often depends on the volume to be filled, that is, in the flow control stage, due to high-speed filling, the shear thinning effect of the melt is often very large, while the cooling effect of the thin wall is not obvious, so the efficiency of the rate has the upper hand, so this filling method is suitable for thin wall products. Low-speed filling: when the heat conduction controls the low-speed filling, the shear rate is low, the local viscosity is high, and the flow resistance is large. Due to the slow replenishment rate and flow of thermoplastics, the heat transfer effect is obvious, and the heat is quickly carried away by the cold mold wall. In addition to a small amount of viscous heating, the curing layer is thicker, which further increases the flow resistance at the thinner part of the wall. Therefore, this filling method is suitable for thick-wall products, even when the mold temperature is higher.  (2) Pressure maintaining stage The role of the pressure maintaining stage is to continuously apply pressure, compact the melt and increase the density of plastic to compensate for the shrinkage behavior of plastic.     In the process of pressure maintaining, because the mold cavity has been filled with plastic, the reaction force of molten material is large. During packing compaction, the screw of the injection molding machine can only move slightly forward slowly, and the flow speed of plastic is also relatively slow. At this time, the flow is called packing flow. In the pressure maintaining stage, the cooling and solidification of the plastic by the mold wall are accelerated, and the melt viscosity increases rapidly, so the resistance in the mold cavity is very large. In the later stage of packing, the material density continues to increase, and the plastic parts gradually form. The packing state should continue until the gate is solidified and sealed, at this time, the mold cavity pressure in the packing stage reaches the highest value. In the pressure holding stage, the plastic presents compressibility due to the high pressure. In the area with high pressure, the plastic is relatively dense and dense; In the area with low pressure, the plastic is loose and the density is low, so the density distribution changes with location and time. The plastic flow rate is very low during the pressure maintaining process, and the flow no longer plays a leading role; Pressure is the main factor affecting the pressure holding process. During the pressure maintaining process, the plastic has filled the mold cavity. At this time, the gradually solidified melt is used as the medium to transfer the pressure. The pressure in the mold cavity is transferred to the mold wall surface through the plastic, which can play a role in increasing the glossiness of the product surface. (3) Cooling stage (storage) In the injection molding mold, the design of cooling system is very important, because only when the plastic molecules are solidified to a certain degree of rigidity can the plastic products be prevented from deformation due to external forces during Demolding. Since the cooling time accounts for 70%~80% of the whole molding cycle, a well-designed cooling system can significantly shorten the molding time and improve the injection molding productivity.       Due to the role of cooling water pipe in the mold, the heat of plastic products is transferred from the plastic in the mold cavity to the cooling water pipe through the mold base through heat conduction, and then taken away by the cooling liquid through heat convection. A few of the heat not taken away by the cooling water will continue to conduct in the mold and disperse in the air after contacting with the outside world. The molding cycle of injection molding includes mold closing time, filling time, pressure holding time, cooling time (lower than melting time) and Demolding time, of which the cooling time accounts for the largest proportion, 70%~80%. Therefore, the cooling time will directly affect the length of plastic product molding cycle and the output. The factors affecting the cooling rate of products include: 1. the design of plastic products; 2. The thicker the wall of plastic products, the longer the cooling time. Mold Cooling Factors: 1. Mold material: including mold core, cavity material and mold base material, which has a great impact on the cooling rate. The higher the heat conductivity of mold material, the better the effect of heat transfer from plastic in unit time, and the shorter the cooling time. 2. Cooling water pipe configuration mode: the closer the cooling water pipe is to the mold cavity, the larger the pipe diameter, the more the number, the better the cooling effect and the shorter the cooling time. 3. Coolant flow: the greater the cooling water flow (generally the better is to achieve turbulent flow), the better is the effect of cooling water taking away heat in the form of thermal convection. 4. Properties of coolant: the viscosity and thermal conductivity of the coolant will also affect the thermal conductivity of the mold. The lower the viscosity of the coolant, the higher the thermal conductivity. The lower the temperature, the better the cooling effect. For mold cooling, the cooling channel with three-dimensional structure produced by three-dimensional metal printing parts can be used to achieve better cooling effect. (4) Demolding stage: Demolding is the last link in an injection molding cycle. Although the product has been solidified, Demolding still has a great impact on the quality of the product. Improper Demolding method may lead to the product deformation and other defects due to uneven stress during Demolding. There are two main ways of Demolding: ejector rod Demolding and push plate Demolding. When designing the mold, we should select the appropriate Demolding method according to the structural characteristics of the product to ensure the product quality. For the mold with ejector rod for Demolding, the ejector rod shall be set as evenly as possible, and the position shall be selected at the place with the largest Demolding resistance and the largest strength and rigidity of the plastic part to avoid deformation and damage of the plastic part. The push plate is generally used for Demolding of deep-cavity thin-walled containers and transparent products that do not allow the traces of push rod. This method is characterized by large and uniform Demolding force, smooth movement, and no obvious traces left.
  • What is CMYK printing? Mar 11, 2023
    What is CMYK printing? CMYK printing: The CMYK printing refer to yellow, magenta, cyan and black. It is a lithographic printing method that uses yellow (Y), magenta (M), cyan (C) and black (BK) four colors to realize full-color reproduction according to the principle of subtractive mixing.   Matters needing attention: Because blue and blue are similar, the four colors have produced a popular saying in many places: black, red, blue and yellow. The printing color is composed of color components and neutral gray components. Under the condition of limiting the amount of printing ink, if the neutral gray component is too much, it will not only cause greater distortion of the brightness characteristics of the printing image, but also relatively reduce the amount of color components, resulting in a decrease in color saturation. CMYK printing emphasizes on increasing the saturation of copied colors at the expense of excessive color brightness, which is another important defect of CMYK printing technology.   The original color image used for printing must be separated into separate color plates, and the black color separation plate shall be added to correct the cyan, magenta and yellow ink to improve the blackness of the printed image. So on the printing press, each printing plate must be accurately aligned with other printing plates in order to obtain high-quality results, which is the industry standard printing method.   Colorich have a famous German brand Heidelberg CMYK printing machine, it can provide you with high quality printing products.
  • Five main points of injection molding Mar 25, 2023
    Injection molding: The five major process elements of injection molding are: pressure, time, speed, temperature and glue amount. (1) Injection pressure The injection pressure is the pressure of the hydraulic cylinder, which is transmitted to the plastic melt through the screw of the injection molding machine. The plastic melt enters the mold through the nozzle of the injection molding machine under the push of the pressure, and enters the mold cavity through the main channel and the diversion channel. This process is the injection molding filling process. The existence of pressure is to overcome the resistance in the melt flow process to ensure the smooth filling process. In the process of injection molding, the pressure at the nozzle of the injection molding machine is the highest, and the pressure at the front end of the melt is the lowest, and the pressure gradually decreases along the melt flow to the front end. There are many factors that affect the melt filling pressure: A. Material factors, such as the type and viscosity of plastics; B. Structural factors, cold (hot) runner, number and position, mold cavity shape and product thickness; C. Forming process elements. Forming process points. This reflects that the injection pressure should not play a leading role in the injection molding of thin-walled products, but is particularly important in the injection molding of thick-walled products. It can also play a decisive role in solving product defects: product shrinkage, melting trace and bubbles; The reasonable setting of pressure depends on the matching of filling speed and time. In the process of injection molding, the setting of packing pressure is also very critical. At the end of injection, the nozzle of the injection molding machine will continue to feed the cavity to fill the empty volume due to the shrinkage of the part. If the cavity is filled without pressure maintaining, the part will shrink by about 25%, especially at the thick wall of the product, which will form shrinkage traces due to excessive shrinkage. The pressure retaining pressure is generally about 85% of the maximum filling pressure, which should be determined according to the actual situation. (2) Injection time The injection time mentioned here refers to the time required for the plastic melt to fill the cavity, melt and cool, excluding the auxiliary time for mold opening and closing. The rationality of this time setting has a great impact on the product quality. Although the proportion of injection time to the molding cycle is not the largest, the adjustment of injection time plays a great role in the pressure control of the gate, runner and cavity. Reasonable injection time is conducive to the ideal filling of melt, and plays a decisive role in improving the surface quality of products and reducing dimensional tolerance. The injection time is much lower than the cooling time, about 1/10 of the cooling time. The thicker the product wall, the greater the time ratio. This rule can be used as the basis for estimating the total molding time of plastic parts. (3) Injection speed The close relationship between injection speed and product quality makes it a key parameter of injection molding. By determining the beginning, middle and end of the filling speed segment, and realizing the smooth transition from one set point to another, the stable melt surface speed can be guaranteed, and the desired molecular orientation and minimum internal stress can be produced. Therefore, when setting the speed of product process debugging, the following speed setting methods are recommended: 1. The speed of the fluid surface should be constant; 2. Rapid glue injection shall be adopted to prevent crystallization of melt molecules; 3. The setting of glue injection speed should take into account the critical area (such as flow channel), and slow down the speed at the water inlet while rapidly filling; 4. The injection speed shall be stopped immediately after the mold cavity is filled to prevent overfilling, flash and residual stress; 5. According to the product structure, the high and low injection speed parameters are set according to the product wall thickness, the melt flow direction and the actual degree of molecular crystallization; 6. It is very important to work closely with other elements of forming conditions. (4) Injection temperature Injection temperature is an important factor affecting injection pressure and speed. The injection molding machine tube generally has 5-6 heating sections, and each raw material has its appropriate processing temperature. In addition to the temperature parameters held in practice, it can also be set according to the data provided by the raw material supplier and the actual situation of the machine. The injection temperature must be controlled within a certain range: the temperature is too low, the melting material is poorly plasticized, which affects the quality of the molded parts and increases the process difficulty; If the temperature is too high, the raw material is easy to decompose. In the actual injection molding process, the injection temperature is often higher than the material pipe temperature, and the higher value is related to the injection rate and material properties. This is caused by the high heat generated by the shearing of the molten material when it passes through the injection port. (5) Ingredients amount In injection molding, a reasonable amount of glue affects the setting of other parameters of molding conditions. During the commissioning of the product forming process, the setting of the melt glue amount should be 15-20mm after the filling of the product. If it is too close to the zero position, the triangular tip of the screw stop ring will wear too fast, and the dimensional stability of the product will not be guaranteed; If the position is too large, too much residual melt will stay in the barrel for a long time, which will change the color and quality of the products in the next the first mock examination, and will also increase the probability of melt decomposition due to too long residence time, resulting in gas. In the melt process, back pressure directly affects the position of glue amount. Back pressure refers to the pressure to be overcome when the screw reverses and retreats during melting. The use of high back pressure is conducive to the dispersion of color and the melting of plastic, which strengthens the density of melt in the barrel, but also prolongs the screw retraction time (if the cooling time is exceeded, the injection cycle of the part will be increased). If the screw speed is increased, the screw will bring the gas generated from the gap between the plastics into the molten material of the material pipe due to the compression into the molten material, and finally be injected into the mold cavity. If it is a thicker product, it will correspondingly increase the probability of bubble generation in the product wall, and also increase the dynamic load of the injection molding machine. Therefore, when the melt is a common material, the back pressure should be lower, generally not more than 20% of the injection pressure, and it is better to have a small amount of melt overflow at the nozzle. In short, in order to improve the injection molding technology, it is necessary to first understand the injection molding principle and process, and then skillfully coordinate the five major factors of injection molding conditions: pressure, time, speed, temperature, and glue amount in the process commissioning, so as to achieve the effect of each factor complementing each other in the process, and then obtain the optimal process parameters of the product.  
  • What is the handmade glue dripping process? Apr 15, 2023
    Handmade glue dripping process Drip glue process can be divided into manual drip and mechanical drip according to the operation method.Let's first understand what handmade adhesive dripping is. (1) Prepare necessary equipment such as weighing instruments, glue adjusting tools, workbench, drying equipment, etc. Place or adjust the balance of the scale, drying equipment and workbench. (2) Preheat the bottom material in an oven at 50-60℃ to remove surface moisture. Place the processed bottom material on a level workbench for dripping.   (3) Measure A glue with a container according to usage amount and proportionally measure B glue. Mix A and B glues with a round glass rod (or stainless steel rod) in one direction while continuously stirring for about 1-2 minutes until well mixed. If there are many bubbles, put the mixed glue into a vacuum dryer, turn on the vacuum pump to remove air bubbles from the mixture. (4) Pour AB mixed adhesive into soft plastic bottles with pointed nozzles and scales for dripping. Drip a certain amount of adhesive onto preheated bottom materials placed on horizontal workbenches and let it flow naturally. (5) After dripping crystal glue for 3-5 minutes, check if there are any bubbles or dust particles on its surface. If there are small bubbles present use fine needles to pick them out; if you find dead corners where crystal glue has not flowed smoothly use needles to guide it towards those areas. (6) The poured product is cured at room temperature of 20-25℃ for 12~14 hours until it becomes non-sticky crystalline shape. (7) Clean up all drip-gluing tools after use.
  • What is a plastic pellets? May 13, 2023
    What is a plastic pellets? Plastic pellets are uniform particles made by a special processing method, in which excessive additives and carrier resins are pre-mixed and melt-plasticized to fully disperse the additive components into the carrier resin. They are one of the most commonly used key materials in plastic processing. The pellets contain the necessary additive components for plastic molding, but their properties are different from both resins and additives. They cannot be directly used to make molded products, so they can only serve as intermediate materials for plastic processing.     However, due to the similar appearance of plastic pellets and molding resins, they are easy to use, dust-free, and pollution-free. The functional components have been evenly dispersed in the carrier resin, which can obtain high-quality molded products. They are easy to measure, convenient for management, and have high stability between batches. Therefore, plastic pellets have environmental friendliness, process stability, reliability of quality and convenience of use advantages. As a result it has become the most commonly used key material in plastic processing. Plastic packaging is one of the important uses of plastics. This type of packaging has light weight but good mechanical properties with suitable barrier properties and permeability resistance; good chemical stability; good molding performance with low processing costs; as well as excellent secondary processing capabilities and decorative properties. Therefore it has become the largest quantity used among metal ceramics paper plastics fiber class packaging materials with wide range applications. Plastic pellets provide a solution to improve the applicability of plastic packaging materials. The purpose of packaging is to protect items, facilitate use, and provide product information. By adding plastic pellets during the molding process of plastic packaging materials, not only can the desired color be provided but also the processing and durability performance of plastics can be improved (such as light resistance, heat resistance, migration resistance), in addition to increasing other functional applications (such as flame retardancy, antibacterial properties, antistatic properties, barrier properties). This provides a relatively perfect solution for improving the applicability of plastic packaging materials.
  • Do you know what a functional masterbatch is? Jun 09, 2023
    Do you know what a functional masterbatch is? Functional masterbatch is a type of masterbatch that contains functional additives other than color. These functions can be simply divided into three categories: The first category: improving the processing performance of plastic molding, such as processing aid masterbatch to reduce mold fouling and eliminate melt fracture, cooling masterbatch to lower molding temperature, drying masterbatch to absorb moisture in raw materials, slip agent masterbatch for easy demolding of injection molded parts, anti-slip and slip agent masterbatch to prevent film slipping during winding, anti-blocking agent masterbatch to prevent film adhesion between films and cleaning compound mother granules for saving material used in color change cleaning. Using this type of functional masterbatch not only facilitates operation but also improves product quality while increasing production efficiency and reducing energy consumption. The second category: improving the physical and chemical properties of plastics, such as antioxidant mother granules that improve the thermal aging resistance and resist yellowing phenomenon of components; weather-resistant mother emulsion that enhances the weather resistance of finished products; physical characteristic performance forms (such as nucleating agents or clarifying agents) that enhance stiffness or transparency levels; toughening mother granules that improve mechanical properties of molded parts; slip agent mother granules that reduce surface friction coefficient of molded parts; opening emulsion for reducing bottle cap opening torque; thermal conductivity emulsion for enhancing plastic heat transfer performance; conductive emulsion for enhancing electrical conductivity performance; filling mother granules for improving plastic mechanical characteristics while reducing costs. The third category: adding application functions to products, such as antistatic mother granules which reduce surface resistance on molded parts; flame retardant agents which improve material fire resistance performance characteristics ; antimicrobial agents which increase plastic's ability to resist microbial invasion ; barrier agents which enhance gas (such as oxygen , carbon dioxide , water vapor ) permeation barrier effect on plastic packaging materials ; degradable agents which reduces environmental pollution burden level ; odor removal or fragrance addition. In addition, there are other types such as reducing weight and producing shock absorption effects through foaming.  
  • Precautions for using plastic pellets Jul 21, 2023
    High-quality plastic pellets usually have several characteristics: Good compatibility with molding resins; good dispersion of functional ingredients; good molding and processing properties; non-toxic, environmentally friendly, and compliant with relevant industry regulations; high dilution ratio (i.e. low addition amount); stable product quality between batches; cost-effective. Precautions for using plastic pellets The effectiveness of using plastic pellets is not only related to the quality of the pellets themselves, but also to the quality of the raw materials used for molding, molding processes, equipment and usage methods. Improper use may result in mold defects or even waste products in plastic packaging production. Therefore, when using plastic pellets, attention should be paid to the following issues: 1. Processing suitability: The processing suitability of the masterbatch refers to its compatibility with the molding substrate. Plastic masterbatches contain a certain amount of resin, and each type of masterbatch is only suitable for use with compatible molding resins. If incompatible masterbatches are used, the molded parts may have skinning, delamination, or loss of mechanical properties. Even if they are compatible, differences in melt rheology can cause defects such as flow marks, weld lines, and color variations on the surface of molded parts that affect product appearance and performance. The processing suitability of the masterbatch also refers to its compatibility with different forms of plastic packaging materials such as films, sheets, bottles, drums and caps which have different requirements for dispersing agents. Different types of plastic packaging materials have varying degrees of sensitivity to dispersibility depending on their intended use. Thin films and sheet-like materials require a high degree of dispersion while thick-walled packaging materials like chemical plastic barrels do not require high levels of dispersion. Therefore using ordinary injection-grade colorants for blow-molding or extrusion film production may result in problems such as speckling or rough surfaces even small holes. The processing suitability also includes its applicability to various molding processes since plastic packaging products come in different sizes with varying production rates; some products like beverage bottle caps have short cycle times lasting just a few seconds while others like plastic pallets take several minutes per cycle time. Masterbatches have heat resistance limitations so if low-heat-resistant ones are used for long-cycle-time products it could lead to discoloration or burning causing dispersing agents to lose their corresponding effectiveness. Finally, the processing suitability also involves its applicability to measuring equipment especially when configuring automated measuring devices on molding equipment where there is a requirement for particle size uniformity particularly when using volumetric measurement devices because ordinary masterbatches might cause uneven measurements affecting product quality during molding process. 2. Regulatory Compliance The regulatory compliance of plastic pellets depends on the raw materials used. Different industries have different requirements for the regulatory compliance of plastic packaging materials. For example, electrical packaging materials need to comply with ROHS requirements; food packaging materials need to comply with relevant regulations for plastic materials and products in contact with food, such as GB 9685-2016, GB4806.6-2016, and GB4806.7-2016; cosmetic packaging materials must comply with "Cosmetic Hygiene Regulations"; if exported to the European Union, they must also meet ROHS requirements. If a product meets the regulatory requirements of the electrical industry, it cannot be used for food packaging. 3. Performance Suitability Different types of pellets have different performance suitability characteristics. For example, color masterbatch's color performance is not only related to the colored resin but also affected by factors such as the shape of molded parts, molds and other auxiliary amounts during molding process. Therefore, using the same color masterbatch on different products may show differences in color shades; similarly, plastic packaging material's migration resistance is related to its contents' nature and type being packaged inside it . When using identical pellets for packing various items that differ in their properties or nature , due to varying migration rates , problems may arise . For functional masterbatches , there are more factors affecting their effectiveness which require testing and evaluation . For instance , anti-static masterbatches come in fast acting but short-term types ; slow acting but long-term types ; or even permanent ones . Misuse can lead to failure in achieving expected results .
  • What aspects need to be considered when formulating the recipe for plastic pellets? Aug 18, 2023
    What aspects need to be considered when formulating the recipe for plastic pellets?   Plastic pellets, especially those used for plastic packaging materials, are mostly customized according to the requirements of the end product. When manufacturers formulate the recipe for their products, they usually need to consider factors such as: end-use requirements, shape of the final product, type and specifications of resin used in molding, molding methods and process conditions, pellet addition ratio, compliance with regulatory requirements for products' key performance control and inspection methods. Additionally, acceptable prices and expected usage also need to be taken into account.   For example: if a blue mother pellet is needed for beverage bottle caps; during formulation design it is necessary to understand which type of beverage (carbonated drinks? Fruit juice? Tea drinks? Water?), what material (PP? HDPE?), what cap type (single-piece cap? Two-piece cap? 38mm cap? 28mm cap?), what molding method (injection molding or compression molding), highest processing temperature required , pellet addition ratio , color determination method (visual judgment or instrument measurement), if using an instrument measurement then measuring conditions should include sample form , sample thickness , light source selection , color space selection and color difference range . Whether secondary processing is required (printing or assembly) and regulatory compliance requirements - whether it complies with Chinese food contact material standards or EU/US FDA regulations etc.   Because one color can be achieved by multiple coloring schemes but different pigments have different properties and prices. Even within same pigment category there may still exist differences in performance & price among different suppliers’ products. Although several schemes may result in very similar colors but other properties such as heat resistance,dispersion,migration resistance,dimensional stability etc., may not necessarily be similar thus their suitability will not necessarily be identical either. Of course this could lead to significant cost differences reflected in mother pellet production costs. Our products such as Special Single Well Compact For Various Design or Sepcial Lip Gloss Packaging In Sepecial-Look will control your costs. Let's work together to create more outstanding color packaging boxes and win more trust and praise for your brand!
  • Classification of Plastic Pellets Sep 15, 2023
    Classification of Plastic Pellets The pellets used in plastic packaging can be simply divided into two categories according to their additive components: Color masterbatch (main component is coloring agent) Functional masterbatch (such as anti-aging agents, antistatic agents, flame retardants, fillers). Plastic Color Masterbatch It is the most widely used coloring method in plastics. Different coloring agents give different color performance to plastic products such as hue, tinting strength , coverage rate , transparency , color fastness (such as sun protection , weather resistance , solvent resistance , migration resistance and heat resistance) etc. For plastic packaging materials,the purpose of coloring is not just limited to meeting ordinary color identification requirements but more importantly it aims at attracting consumers' attention and promoting product sales. Plastic color masterbatches have customized functions that can provide manufacturers with required colors. In addition to traditional non-color series such as white-black-gray and common colored series such as red-orange-yellow-green-blue-cyan-purple-brown etc., various special effects colors are also available including pearl effect,metal texture effect,multi-angle changing effect,temperature-induced changing effect,light-induced changing effect,whitening effect ,luminous effect ,fluorescent effect ,marble patterned effect ,wood grain imitation  effect ,sparkling or speckled effect etc. Some special effect colors are listed as follows:           Night light (phosphorescent pigment)                          Long night light (luminous pigment)                 Flash effect                                      marble effect                                    speckle effect.          Visible light color changing                   infrared color changing                           edge glowing                      Matte effect                               Temperature change                            Camouflage Our products such as Square Single Well Square Case Cosmetic Packaging or Square Lip Gloss Tube In Thick Wall Empty Packaging will not have such problems. Let's work together to create more outstanding color packaging boxes and win more trust and praise for your brand!

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