Shanghai Risheng Technology Co., Ltd.

With the rapid expansion of the production scale of regular polymer materials, the total amount has been surplus, and the contradiction between single variety and low technical content has become increasingly prominent. As a hot spot in the field of new materials research, flame retardant polymer materials will inevitably decline if they can not keep up with the demand for product diversification and multi-function in domestic and foreign markets. The multifunctional modification of flame retardant polymer materials is of great significance to enhance the scientific and technological content of materials, meet the needs of different fields, and improve the added value of flame retardant materials. Any polymer material with flame retardant properties (plastic, rubber, natural or synthetic fibers, etc.) is given other special properties that it does not have, which is called multifunctional flame retardant polymer material. In this paper, the author will briefly introduce the development status, development trend and realization way of multi-functional flame retardant materials.

1. Flame retardant antistatic material

In China, referred to as "double resistance" polymer materials, commonly used in the manufacture of plastic floors, ceilings, carpets, work clothes, curtains and various fabrics. For example, in the process of mining production, the material continuously passes through each transfer point and causes a huge impact on the equipment when falling, and is accompanied by severe friction. At this time, it is not only required that the flame retardant polymer buffer strip has flame retardant property, but also has antistatic property. The method of eliminating static electricity is generally by enhancing its surface hydrophilicity to reduce its surface resistance and accelerate the leakage of static charge; or mixing conductive additives to dissipate static electricity in the form of corona discharge. Flame retardant antistatic modification mainly includes copolymerization, blending, adding nanomaterials, etc. Through years of chemical modification experience, Shanghai Rizhisheng has developed flame retardant antistatic nylon material A023-1 and B023-1, which can be used with PCB printed circuit boards, electronic touch screen plastic housings, electrical CPU brackets, etc.

2. Flame retardant conductive plastic

Plastic itself has good insulation performance, with heat insulation, sound insulation effect, but in some cases often need both flame retardant and conductive polymer materials, because it is far lighter than metal conductors.

3. Flame retardant and antibacterial materials

Mainly used in clothing, health supplies, medical supplies, labor protection supplies and sporting goods, etc., generally through the copolymerization of synthetic process or blending into the introduction of antibacterial agents, giving the material with flame retardant and antibacterial. Such as nano-antibacterial agent is the use of physical adsorption and ion exchange methods to have antibacterial effect of Ag, Zn2 plasma and its compounds adsorbed in such as zeolite, silica gel and other loose porous carrier materials, the treatment of nano-antibacterial agents, flame retardants, other additives and matrix resin by twin-screw extrusion. However, from the perspective of the durability of flame retardant and antibacterial, the copolymerization method is the main development direction in the future.

4. Flame retardant and anti-melting materials

For example, polyester fiber, in the use of a relatively large disadvantage is the preheating of molten drops, the high-temperature molten drops can not only burn the body, but also as a secondary fire source to ignite other flammable materials around. Therefore, the polyester material should not only be flame retardant modification, but also give the polyester anti-melting properties. GE of the United States General Electric Company uses the addition of anti-melting additive powder in polymer materials to obtain anti-melt drop resin materials; Japan also reported the addition of polytetrafluoroethylene and flame retardants with an average molecular weight of more than 1 million to polyester to obtain polyester fibers with good flame retardancy and melting resistance.

5. Flame-retardant and waterproof (moisture-proof) materials

Some flame retardant fabrics, especially natural polymers such as silk, cotton and linen, have no waterproof effect, and flame retardants often cannot withstand long-term water invasion, so it is necessary to use waterproof flame retardant coatings, or waterproof treatment on flame retardant fabrics, so that the fabric has the dual function of waterproof and flame retardant.

6. Flame retardant, UV resistant and heat resistant materials

Flame retardant materials, especially halogen-containing flame retardants, are exposed to sunlight or ultraviolet rays, and are easily dehalogen and become free radicals. They can react with materials to cause discoloration of materials and are harmful to human health. In addition, some macromolecules themselves are affected by light or heat, which can also lead to molecular weight degradation or discoloration, which directly affects the quality of the material. Therefore, flame retardant materials used in many outdoor applications or long-term high temperature must solve the problem of heat resistance and UV resistance. Shanghai Risheng's flame retardant reinforced PET series products can achieve a perfect balance in flame retardant, strength, heat resistance and fluidity.

7. Flame retardant insulation materials

After the plastic is treated with flame retardant, the original insulation performance of the material is often significantly reduced, so special technology should be used to make the excellent performance of the plastic not affected by the flame retardant or flame retardant system, such as the flame retardant microencapsulation treatment. Shanghai Risheng has developed a variety of multi-functional materials with high flame retardancy and high insulation, such as plastic safety series products with high GWIT and high CTI, to provide customers with a safe electricity environment. (For the introduction of GWIT and CTI, please refer to the report before this public number.) Other materials such as flame retardant micro-foamed flooring and flame retardant sound insulation and heat insulation foaming materials need to be endowed with 2 or even 3 kinds of properties at the same time.

At present, the multi-functional modification of flame-retardant polymer materials is mainly realized by adding two or more additives. The biggest disadvantage of the multi-functional flame-retardant polymer materials obtained by this method is that the addition of a variety of additives affects the main properties of flame-retardant materials. From the development trend, it is a hot research topic in the future to obtain dual-function or multi-functional flame retardant materials by adding an additive, which can reduce the interaction and influence between various additives and materials, and reduce the compatibility problems caused by the addition of additives. How to realize the multi-function of flame retardant materials, improve the scientific and technological content of flame retardant materials, and give high added value to flame retardant products, Shanghai Risheng will work with you to explore.