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Analysis of the causes of color mixing in plastic parts

1. In terms of raw materials-raw material pollution: Plastics of different colors are not isolated when stored or transported, resulting in mixed particles. For example, if light-colored raw materials come into contact with dark residues, the finished product is prone to variegated stripes. - Masterbatch dispersion problems: Local color blocks or spots may appear when the masterbatches are of low quality or have poor compatibility with the substrate. It is necessary to ensure that the melt index of the masterbatch and the binder match. Equipment factor-the material barrel is not completely cleaned: directly switch to light-colored materials after producing dark parts, residual pigments can easily penetrate into the new materials.

2. The sudden discoloration problem of plastic parts during injection molding processing is mainly related to four aspects: equipment, molds, processes and raw materials. The specific reasons are as follows: Insufficient cleanliness of equipment in terms of equipment: dust or dust deposited in the hopper will pollute the material, causing discoloration. For example, after dust is mixed into plastic, oxidation reactions may occur at high temperatures, causing spots or overall discoloration on the surface of the product.

3. Burst: Cracks or fractures that occur when plastic parts are subjected to external force are usually related to insufficient material toughness, excessive injection pressure or unreasonable mold design. Scratching: The surface of plastic parts is scratched or worn during processing, transportation or assembly. Black spots and pockmarks: Black or pockmarks on the surface of plastic parts are usually caused by impurities in the plastic, mold contamination or incomplete cleaning of the injection molding machine.

4. The color change of plastic parts is usually caused by the addition of inappropriate color components to plastic particles during the production process. This discoloration mainly occurs when plastic parts are exposed to light, which accelerates the decomposition of color components, causing the color to gradually fade away. Once this happens, the original color cannot be restored through any chemical method.

5. Analysis of undesirable phenomena and causes The main undesirable manifestations are color mixed: uneven color or spots appear on the surface of the product, resulting in appearance defects.

6. The color of plastic parts of the 018 Volkswagen Tiguan L is usually black. Reason analysis Overall style coordination: Volkswagen's model design style is relatively stable and atmospheric, and black plastic parts can match the overall color and style of the car body, making the appearance of the vehicle look more unified and coordinated. For example, the color of the main body of the car body may be the common white, black, gray, etc. The integration of black plastic parts into it will not appear abrupt, but enhance the overall texture.

How to deal with chimei pc110 with white color master color mixture

1. Solution: Thoroughly air injection, remove the glue glue cylinder and clean it, reduce the plastic temperature, shorten the heating time, and strengthen the drying of the plastic Reason 2: the plastic is mixed with debris, paper scraps, etc. Solution: Check the plastic, completely air injection Reason 3: When injected into the mold, cause focal spots solution: reduce the glue injection pressure and speed, reduce the plastic temperature, strengthen the mold exhaust hole, close the molding operation as appropriate, change the position of the overflow Reason 4: There is a dead corner in the glue cylinder that causes the plastic to overheat Solution: Check the contact surface between the spray nozzle glue cartridges for gaps or corrosion.

2. PC110 plastic has two types: blue and white bases. The selection needs to be combined with specific application scenarios and process requirements. The types of PC110 plastic are differentiated in the raw material market. The PC-110K polycarbonate raw materials produced by Chi Mei are clearly divided into two versions: blue and white transparent. This color difference is mainly determined by the allocation of basic color masterbatches during the preparation of raw materials, and is not formed by post-processing and dyeing.

3. There were no batch quality problems caused by performance differences, further proving the feasibility of its substitution. Alternative suggestions If you need to fully match all the properties of Lotte PC-1100, you can choose Chimei PC-110 first; if there are higher requirements for light transmittance or impact strength, you can modify it by adding 0.5%-1% nano-silica or acrylate toughening agent, increasing the cost by about 8%-12%, but the performance can be improved to 102%-105% of Lotte PC-1100.

Why are transparent PCs blue and white?

1. The main reasons why transparent PCs have blue and white are as follows: Color matching processing: Market demand: The background color of transparent PCs can be adjusted according to market demand. Some products require a blue background color, while some require a white color. This toning process is achieved by adding a specific toner to the PC material. Influence during particle synthesis: Influence of moisture: During the synthesis process of PC particles, if it is affected by moisture in the air, it may cause the particle background color to turn blue.

2. Regarding the background color of light emitting, he distinguishes the CB based on the market. The end of the CB is blue. Some products are required to use transparent materials and some require white. To put it bluntly, the PC that emits light has color. First-line brands such as bayer, sabic and Teijin have no control over the background color. No control means no requirements. They are all within their respective Y-value qualification standards. They do not add color colors.

3. PC110 plastic has two types: blue and white bases. The selection needs to be combined with specific application scenarios and process requirements. The types of PC110 plastic are differentiated in the raw material market. The PC-110K polycarbonate raw materials produced by Chi Mei are clearly divided into two versions: blue and white transparent. This color difference is mainly determined by the allocation of basic color masterbatches during the preparation of raw materials, and is not formed by post-processing and dyeing.

4. This should be related to the PC material selected. PC materials have blue backgrounds and white backgrounds, both of which are transparent. You can see it by looking at the background color of the material.

5. Different presentation effects. The appearance of the blue pc bucket is relatively transparent and smooth, light blue with faint blue light, no impurities and black spots, strong toughness, and a damage life of at least 3 years; the white pc bucket is relatively inferior, has poor transparency, and the tank wall has impurities, many black spots, poor toughness, easy to crack, deform, and have a peculiar smell. PC plastic, the English name of polycarbonate is Polycarbonate, or PC for short, is an amorphous thermoplastic.

6. Blue is good. Quality: The blue PC barrel is a container produced from brand-new food-grade polycarbonate. The sound of tapping the tank wall with your fingers is crisp and tough, while the transparent PC barrel taps the tank wall with your fingers and makes a dull sound. Poor falling performance, poor toughness, and easy to crack and deform during use. Color: The blue appearance is relatively smooth, the tank body is light blue with faint blue light, without impurities and black spots, while the transparent bucket is dull in color, poor in transparency, and the tank wall has impurities and many black spots.

What should I do if there is mixed color in the rubber inlet attachment of the hot runner mold?

Possible problem points: There are dead corners in the hot runner. Plastic accumulates in the dead corners when passing by. The temperature control is inaccurate and the temperature of the hot runner (plate) is too high.

Optimization of mold and rubber inlet structure-Check the size of the rubber inlet: too small the rubber inlet will lead to shearing and overheating of the material flow. The cross-sectional area of the rubber inlet needs to be appropriately enlarged to ensure smooth passage of the material flow. - Grind the inner wall of the rubber inlet: Burrs and rough surfaces on the inner wall of the rubber inlet will increase the material flow resistance and shear force. Use oil stone or mirror polishing tools to polish the inner wall of the rubber inlet to a finish below Ra0.8.

The hot runner rubber inlet of injection molding products is blackened. The core is to solve the problems of overheating decomposition and carbon residue in the rubber inlet area. It can be adjusted and optimized from four dimensions: process, equipment, raw materials, and mold. Adjust process parameters to reduce injection molding temperature: Prioritize the temperature of the barrel and hot runner heating section, especially the temperature of the hot nozzle near the rubber inlet, to avoid thermal degradation of plastic after staying at high temperatures for a long time.

The core adjustment idea for blackening the hot runner rubber inlet of injection molding products is to investigate and solve it from the four dimensions of raw materials, equipment, process, and mold, and give priority to the most common causes of high temperature decomposition, impurity residue, and poor exhaust.

This is the end of the introduction of the reasons for PC transparent color mixing and the reasons for PC transparent color black spots. slot machine ph casino,slot ph casino,slot casino,slot ph,BAY888.com The world's leading slot game platform, providing exciting gaming experience and generic rewards. Join now and start your journey to victory!。