The Color And Process Basic Knowledge Of Plastic Cosmetic Bottle
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Update time : 2023-07-21 19:35:08
Today, we will introduce some basic knowledge about the color and process of plastic cosmetic botttles. The color matching is based on the three basic colors of red, yellow, and blue (three primary colors). It is equipped with the color that is loved, meets the color difference requirements of the color card, and meets the color of the customer's hope, the economy, and the color that does not change the color in the processing and use.
01 color agent Pigment and dye Pigment characteristics: The pigment is a color that cannot be dissolved in ordinary solvents. Therefore, you need to obtain the ideal coloring performance. You need to use mechanical heating and mixing to uniformly scattered the pigment in plastic.
Pigment Category: Paint pigments can be divided into organic pigments and inorganic pigments. Inorganic paint: Advantages: good thermal stability, very good weather resistance, excellent light stability, low price, and superior decentralized performance. For example: titanium pink, carbon black, etc.
Titanium white powder series: mainly three types: titanium pink, zinc oxide, and zinc. Titanium white powder is divided into two structures: golden red stone type and sharp titanium type. The refractive index of gold and red stone type titanium pink powder is high, high covering power, stability, and good weather resistance. If the titanium pink is not decentralized when the original factory leaves the factory, a large number of black spots will be generated during the color matching process. It is decentralized and not open. Therefore, it is necessary to use decentralized agents for decentralized processing. Some manufacturers' cards enter the market after processing. Such materials can be used directly. It is mainly used to cover the transmission of resin and increase the role of whiteness.
Carbon black: It is commonly used in black pigments, which is cheap. In addition, it also has the effects of ultraviolet protection (anti -aging) and conductive effects on plastic. Different production processes can obtain a variety of different charcoal blacks with a wide range of particle size range, and the properties are very different. Carbon black is divided into carbon black and rubber reinforcement. Pigment carbon black is divided into high pigment carbon black, medium pigment carbon black and low pigment charcoal black according to its coloring capacity. Cybers black particles are easy to gather. To improve the color of carbon black, it is necessary to solve the dispersability of charcoal black, and it is necessary to add a dispersant to processing before it can be used.
Organic paint: Advantages: high color power, bright color, complete chromatography, small relative density, and small amount.
Disadvantages: heat resistance, weather resistance, and covering power are not as good as inorganic pigments. The dispersal effect is poor. The transparency is worse than the dye, and the price is higher.
dye: Advantages: The organic compounds that can be used for most solvents and dyed plastic are small density, high color force, and good transparency.
Disadvantages: But the general molecular structure is small, and the price of migration (crystalline materials) is priced in migration (crystalline materials) when coloring, and some prices are close to the price of organic pigments.
Pearl pigment Also known as Yunmu titanium pearl pigment, it is a Yunning chip coated with titanium dioxide. According to different hue, it can be divided into three types: silver -white pearl pigment, rainbow pearl pigment, and colorful pearl light pigments. Precautions When buying pigments, you must understand the dye index (C.I) of the pigment. C.I is an international dye and pigment variety compiled by the British dyed home association and the American textile chemist and the dyed home association. Each pigment has two numbers according to the application and chemical structure category. To avoid misunderstanding of the same molecular structure and different names, it is also conducive to the time. The management and use of the correct pigment during use are convenient to find the cause when there is a problem.
02 color scheme coloring craft Color coloring can be used to add color powder to the resin method, color powder mixed resin extract, and color mother grain method.
Add color powder to the resin method: After the color powder and plastic resin are mixed directly, they will be sent to the next step of the product forming process. The process is short and the cost is low, but the working environment is poor, the color of the color is poor, the color uniformity and the quality stability are poor.
Squeeze the color powder mixed resin: This method has better effect on the uniformity of resin and color, and can fully disperse the pigment in the resin. The color is accurate, the quality is clean, and it is easy to process. Color mother grain method: It is the material and carrier resin, decentralized agent, and other additives to form a certain concentration of coloring agents. When the product is formed, according to the color requirements, add a certain amount of color mother grains to make the product contain the required color dose to meet the color requirements.
The color mother grains can be classified according to the desire of color resin, such as ABS color mother grains, PC -colored maternal grains, PP color mother grains, etc.; Can also be classified according to color resin processing. Due to the pre -treatment of the pigment, the color mother grains has a high color force, the amount of dosage can be reduced and the quality is stable. The transportation, storage, use is convenient, and the environmental pollution is greatly reduced.
Disted agents exclude the surface air through the wetting and penetration of the pigment, disperse the condensate and agglomerate into fine, stable and uniform particles, and no longer condense during the processing process. The commonly used dispersant is a low molecular polyethylene wax. For more difficult to disperse organic pigments and charcoal black, EVA wax or oxide ethylene wax is used to synthesize low molecular polyethylene polyethylene. The low -molecular weight polyethylene waxes of wax and polyethylene cracking legal system are very different. Other additives include coupling agents, antioxidants, light stabilizers, anti -static agents, fillers, etc. The amount of additional additions depending on the requirements and varieties, called multifunctional maternal particles, and then adding light brighteners, which is conducive to molding and improving the surface light of the product.
The color difference, whiteness, yellowness, yellow variation, thermal stability, oxygen index, melt flow rate, etc. of the sexual indicators of color mother grains. Of course, the fineness, migration, chemical resistance, and toxicity of the pigment are also related to the performance of the female granules.
03 color scheme management The hardware management of color management has a computer that measures and processes the measured data. The color measuring meter can be divided into two types: the spectrophotometer and the color difference meter, instead of the human eye measurement color, and removing the effects of human factors on the measurement results.
Sitidum optical meter is used to determine the reflection coefficient of each wavelength to the completely diffuse reflection surface. It cannot directly obtain the color value or color difference, but it can evaluate the color value and other values of the data through it. The spectrophotometer can be divided into two types: diffraction grating splitting and using interference filter light. Advanced internal microproofing of the internal microprocessor has the functions of 0%, automatic correction and increase rate increase, which improves accuracy.
The color difference is a simple test instrument, that is, making a filter with the lighting characteristics of the sensitivity of the human eye. The key is to design a filter with the color difference between the color difference between the light sensitivity and can measure the color difference in the light source under certain light sources. Batch management, the color difference with small microcomputer, it is easy to use standard model for correction and output multiple color differences.
Coloring management software has a spacing reverse rate curve, color difference formula, condition and other color representation, cover power representation and fogging representation method. The spaging reflectance curve is used to select the analysis of the coloring agent, and it cannot be used to determine the consistency of the color. The color difference is one of the most important indicators in color management, but the color differences obtained by different color difference formulas are different. Therefore, it is necessary to indicate the color system or color difference formula used.
04 computer color matching Color meter The use of computers for color adjustment formula and its management have been successfully used in plastic color coloring.
The computer color meter has the following functions: 1) color matching Establish a commonly used facial (dye) database according to the requirements (prepare the basic color board and enter). Then enter the computer in the software menu and enter the computer, click on several candidate pigments in the keyboard, and immediately calculate a series of formulas, and sort the color difference and price for color selection;
2) Formulating correction Fixed the computers to list the formula and other sources. When the color difference is unlike, the inconsistent reflective curve displayed by the monitor can directly increase or decrease the amount of pigment through the keyboard until the two curves are basically overwhelmed.
3) Color measurement and color difference control Measure the coloring strength of the color, the whiteness of the product, the product color of the product, and the color difference. Because the computer can quantitatively express the performance indicators of the color, it is conducive to the information communication and transmission of the two parties;
4) Color management In the daily work, information, formulas, process conditions, production date, and user information can be stored in computers, which is easy to retrieve, find, and serve as a reference for modification. It is convenient, fast, improve work efficiency, and facilitate confidentiality.
