There are mainly two kinds of colorants for Optical Cable Connector Box, one is an inorganic pigment with strong hiding power and good heat resistance; the other is an organic pigment with bright colors and strong tinting power. In addition, there is a special coloring agent, such as the substance that can improve the whiteness of plastic injection parts factory products is called fluorescent whitening agent, and the substance that makes the pearly gloss of plastic products is called pearlescent machine. Lubricant is a kind of substance that can reduce the friction inside the plastic melt and between the melt and the processing equipment, and improve the fluidity and mold release of the plastic during the molding process.
Functional plastic additives, such as colorants, flame retardants, fillers, antistatic agents, etc., can impart various good properties to polymers. Therefore, plastic additives play a very important role in the development of the plastic industry. There are many types of plastic additives, and with the development of the plastics industry, new types of additives are constantly emerging. Now there are more than a dozen categories and hundreds of varieties. Heat stabilizers and plasticizers are mainly used in polyvinyl chloride and its copolymers.
The fillers commonly used in the concrete industry include inorganic fillers such as calcium carbonate and talc, and organic fillers such as wood flour. Reinforcement materials can significantly improve the mechanical properties, heat resistance and dimensional stability of plastic products. Most of the varieties are fibrous substances, such as glass fibers, asbestos fibers, carbon fibers, and so on. Colorants are a class of substances that can color plastics and give plastics color. After coloring, plastic products are not only beautiful and easy to identify, but also increase the commercial value of plastics.
Due to the unstable molecular chain structure of resins such as heat stabilizers and plasticizers, which are sensitive to heat and easily degraded during molding and use, heat stabilizers are produced to solve this problem. Their varieties include basic lead salts. Type, metal soap type, organic tin type. Plasticizer is a kind of liquid or low melting solid with polar or partially polar high boiling point, difficult to volatilize and have certain compatibility with the polymer. Plasticizers are distributed between the macromolecular chains, reducing the intermolecular forces, reducing the viscosity of the polymer and increasing its flexibility.
Antioxidants and light stabilizers-Plastics will be degraded and discolored under the influence of light, heat, oxygen, radiation and other factors, and the physical and mechanical properties will gradually deteriorate, and eventually the use value will be lost. This is the aging phenomenon of plastics. Substances that inhibit or slow down this damaging effect are called stabilizers. In addition to thermal stabilizers, there are also antioxidants and light stabilizers. Antioxidants are the main body of stabilization aids and are widely used. Their role is to eliminate the peroxide radicals generated in the aging reaction, thereby stopping the chain reaction of oxidation and preventing the oxidative degradation of plastics.
Although some resins can be processed without additives, most resins need to be matched with additives to meet the requirements of certain performance and molding processing of plastic injection part products. For example, the molding and processing of PVC plastic products must be supplemented with a thermal stabilizer to prevent it from being degraded during the molding process to remove HCI and discolor and scorch, and the corrosion of HCI gas to processing equipment; polypropylene is a type that is highly susceptible to thermal oxygen aging. Resin, pure polypropylene resin will undergo oxidative deterioration during the molding process, and the antioxidant can be smoothly processed after adding the antioxidant, and the product can also be used at 120 ° C for a long time.
的 Substances that can inhibit the light aging process of plastics are called light stabilizers, and their role is to extend the outdoor service life of plastics. Generally, they are added only when needed. Commonly used are ultraviolet absorbers, light-shielding agents, light quenchers and free-radical trapping agents. Fillers include fillers and reinforcing materials. Adding fillers to plastics can improve the rigidity, hardness and heat resistance of plastics, reduce creep and shrinkage of Plastic Injection Parts, and reduce costs.