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Understand the 12 additives required for nylon modification

Understand the 12 additives required for nylon modification

2022-10-14

Polyamide (PA) is a polymer containing repeated amide groups on the main chain. Often called Nylon, PA is one of the earliest developed and most widely used engineering plastics. Today, Qingdao Sainuo will take you to know about the 12 kinds of additives needed for nylon modification.

1. Lubricant

Lubricants can reduce the viscosity of plastics and the friction coefficient between the modified nylon melt and the processing equipment, which can be divided into internal lubricants and external lubricants. Internal lubricants can reduce the friction of polymer molecules, reduce the viscosity of polymers in molding and reduce energy consumption; External lubrication reduces friction and adhesion between polymer and processing equipment. Such as polyethylene wax, Ethylene Bis-stearamide(EBS).

2. Release agent

Similar to the external lubricant, a thin layer of highly effective isolating agent is formed between the product and the mold to make the product fall off automatically.

3. Filler

An inert material is added to the material in order to increase the quality and reduce the cost. It can also improve the processing performance and some physical properties of the material, such as shrinkage, strength, temperature resistance and corrosion resistance. Here we often use active calcium carbonate, talc, wollastonite, mica, etc.

4. Flame retardant

Flame retardant is a kind of additive that can prevent combustion, which is mainly divided into two categories: reactive and additive.

1) Reactive type: the flame retardant monomer is grafted onto the main chain of PA or copolymerized with PA monomer. The composite material obtained by this system is relatively stable, and the material performance is not affected by the flame retardant. However, the operation and processing of this method is complex, and it is difficult to industrialize;

2) Additive: PA and additive halogen-free flame retardants (such as phosphorus, nitrogen series flame retardants, inorganic fillers, etc.) are blended to form a uniform composite by mechanical blending. This method is easy to operate and becomes the main way of flame retardancy of PA.

5. Toughener

It can improve the impact strength and toughness of materials, also called toughening agent. The most commonly used nylon tougheners include maleic anhydride grafted ethylene octene copolymer (POE-g-MAH) and ethylene propylene diene monomer (EPDM-g-MAH).

6. Plasticizer

Plasticizers can reduce the melting temperature, viscosity and hardness of materials, increase the fluidity and flexibility, and thus improve the processability of materials.

7. Colorants and fluorescent brighteners

Colorants are mainly used to endow materials with colors to make products more beautiful. Fluorescent whitening agents can effectively improve the appearance. When used with colorants, the effect is better.

8. Foaming agent

Foaming agent is a substance that can produce gas and make plastic products produce bubbles or voids. It is divided into physical foaming agent and chemical foaming agent.

9. Heat stabilizer

Heat stabilizers can delay or avoid material damage and further degradation caused by thermal action. Generally, it is not specified that the heat stabilizer refers to the stabilizer used in the processing of PVC and vinyl chloride copolymer.

10. Light stabilizer

Light stabilizers are mainly used to inhibit or weaken the photodegradation of plastics and improve the weatherability of products. Ultraviolet rays in sunlight have the greatest destructive effect on plastics. In addition, impurities or chromophores in polymers can also promote the photodegradation of polymers.

11. Antioxidants

Antioxidants can delay or inhibit the oxidative degradation of plastics, and are the most important type of plastic stabilizing additives. Almost all polymer resins are involved in the application of antioxidants. Generally, it is divided into main antioxidant and auxiliary antioxidant. The main antioxidant has the main function of capturing polymer peroxy radical, and the auxiliary antioxidant has the function of decomposing polymer peroxy compounds, also known as "peroxide decomposing agent".

12. Reinforcing agent

Reinforcers can significantly improve the strength and rigidity of materials. Most of them are high-strength, fibrous inert substances, such as glass fiber and carbon fiber. The amount of glass fiber is large. Because it is white, it can be colored according to the product color, and it is very convenient to use.

To sum up, no matter how good the modified nylon is, it can not be separated from the help of the modifier. It needs not only functional additives but also auxiliary additives. If it is matched with each other and the amount is appropriate, it can show its potential.

Qingdao Sainuo Chemical Co.,Ltd. We are manufacturer for PE wax, PP wax, OPE wax, EVA wax, PEMA, EBS,Zinc/Calcium Stearate…. Our products have passed the REACH, ROHS, PAHS, FDA testing. Sainuo rest assured wax, welcome your inquiry! 

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