Plastic additives

First, improve processing performance

Plasticizer

Plasticizer, also known as plasticizer, is a polymer material additive. Adding plasticizer to plastic products can increase the softness, elongation and plasticity of plastics, reduce the flow temperature and hardness of plastics, and facilitate the molding of plastic products. Therefore, plasticizers are mainly used in PVC soft products, and are also widely used in polar plastics such as cellulose.

Lubricant

Lubricant is an additive that can improve the friction and adhesion between the particles of the plastic layer and the metal surface of the processing equipment, increase the fluidity of the resin, and achieve the plasticizing time of the resin. With the development of science and technology, water-based stamping lubricant technology is the product of scientific innovation. The lubricant has good coldness and permeability, and has little environmental pollution, so it is often used for punch drawing, punching, punching and bending in the forming process of the workpiece.

3. Release agent

The release agent is a functional substance between the mold and the finished product, which makes the surface of the object easy to detach, smooth and clean. It is commonly used in glass fiber, metal die-casting, injection molding thermoplastics, vacuum foamed sheets and extruded profiles. And so on various molding operations. The release agent is chemically resistant and can prevent the chemical components of different resins from being dissolved upon contact.

4. Stabilizer

Broadly speaking, chemicals that increase the stability of solutions, colloids, solids, and mixtures are called stabilizers. In a narrow sense, stabilizers mainly refer to agents that keep polymer plastics, rubber, and synthetic fibers stable and prevent their decomposition and aging. Stabilizers can slow down the reaction, maintain chemical balance, reduce surface tension, and prevent light, thermal decomposition or oxidative decomposition. In industrial production, stabilizers are often used in processing processes such as pipes, sheets, blow molded parts, injection molded parts, foamed products, and paste resins.

Second, improve aging performance

Antioxidant

Antioxidants are a class of chemicals that, when present in small amounts in a polymer system, retard or inhibit the oxidation of the polymer, thereby preventing aging of the polymer and extending its useful life. Anti-aging agent." In everyday life, almost all polymer resins are involved in the application of antioxidants. The ideal antioxidant has good processing property, is not volatile and decomposes under the processing of high polymer, and is non-toxic or low-toxic, and low in price.

2. UV absorber

Ultraviolet absorbers are chemicals that absorb ultraviolet light or reduce the transmission of ultraviolet light. They convert energy and convert high-energy ultraviolet light into energy in the form of heat or non-destructive long light waves. The polymer is protected from UV damage. This additive is colorless, non-toxic, odorless, and has low heat volatility and does not change with heat even during processing.

Third, improve mechanical properties

Toughener

A toughening agent is a substance that increases the flexibility of an adhesive film layer. Substances that reduce brittleness and increase toughness in life without affecting the adhesive can act as toughening agents. Some thermosetting resin adhesives have low elongation after curing, high brittleness, cracking of the rubber layer, and are not resistant to fatigue, and cannot be used as structural bonding. Therefore, it is necessary to add a toughening agent to reduce brittleness, increase toughness, and increase bearing strength. Generally, the toughening agent contains a reactive group, can chemically react with the resin, and is not completely compatible after curing, and can be classified into two types: a rubber toughening agent and a thermoplastic elastomer toughening agent.

2. Filler

A solid substance that is added to a material to improve material properties, or that can increase capacity, increase weight, and reduce the cost of the material is called a filler. In general, organic substances, inorganic substances, metal or non-metal powders which do not contain water, neutrality, or which do not adversely affect materials can be used as a filler. Today, fillers are widely used in the production of plastics processing, rubber processing, paper, coatings, pesticides, pharmaceuticals and other products. The large use of fillers not only improves the performance of these products, but also greatly reduces production costs.

Fourth, improve surface properties

Antistatic agent

The antistatic agent is a type of additive added to the plastic or applied to the surface of the molded article to achieve the purpose of reducing static electricity accumulation. Antistatic agents are generally classified into two types, an internal type and an external type, depending on the method of use. The main use for plastics is an internal antistatic agent.

2. Antifogging agent

The antifogging agent is a low molecular weight dispersing agent containing a hydrophilic group, which is composed of molecules having a molecular weight determined, and coating a surface of a transparent object to form a coating, and the hydrophilic group in the coating can adsorb in the air. The water molecules wet and diffuse on the surface of the transparent object to form a water film (rather than water droplets), so that the light transmitted through the object does not scatter and avoid fogging.

Antifogging agents can be divided into two categories: external antifogging agents and internal antifogging agents.

The external anti-fogging agent is applied by spraying or dipping, and is widely used in agricultural greenhouses because it has the characteristics of being used at a low dosage and being effective immediately, and is convenient to use and low in cost. The internal antifogging agent has a long-term effect, and when the internal antifogging agent is added to the polymer matrix, it can migrate to the surface of the plastic film. After the surface antifogging agent is lost due to the abrasion of the water washing machine, the antifogging agent inside the polymer re-migrates to the surface of the material to be replenished until the antifogging agent contained in the plastic is completely exhausted.

3. Anti-wear agent

Anti-wear agent is an industrial material, in addition to widely used in CPU / PU and TPU, EVA, TPR and other plastic parts, it can also be used in coatings, lubricants, inks and paraffin. The anti-wear agent can not only improve the wear resistance of the surface of the product, prevent the surface of the material from being scratched, but also reduce the friction, noise and adhesion between the materials, and promote the appearance of the product surface to be beautiful and smooth.

Fifth, improve other performance

Foaming agent

A foaming agent is a substance that makes a subject into a hole. A blowing agent is a chemical that can be added to a plastic. At the appropriate time during the process, it will evolve a gas that will form cells in the plastic. This approach can reduce the density and hardness of plastics, enhance their insulation and sound insulation.

2. Nucleating agent

The nucleating agent is a new functional additive suitable for incompletely crystallized plastics such as polyethylene and polypropylene. The additive can shorten the molding cycle, improve the transparency of the product, improve the surface transparency, the tensile strength, the impact resistance, and resist creep by changing the crystallization behavior of the resin, accelerating the crystallization rate, increasing the crystal density, and promoting the grain size to be fine. Sexual effects.

3. Colorant

Colorants are chemical substances that are insoluble in common solvents. In the color processing of plastic products, the pigment can be uniformly dispersed in the plastic by mechanical means to obtain the desired coloration. The pigments used for coloring can be classified into inorganic and organic types. Inorganic pigments have excellent thermal stability and light stability, low price, but relatively poor coloring power; organic pigments have high tinting strength and bright color, but heat resistance, weather resistance and hiding power are not as good as inorganic pigments.