Liquid silicone rubber

Liquid silicone rubber, also known as liquid silicone rubber, is relative to solid high-temperature vulcanized silicone rubber. It is liquid rubber. It has the characteristics of good fluidity, fast vulcanization, more safety and environmental protection, and can fully meet the requirements of food grade. Liquid silicone rubber has excellent tear resistance, resilience, yellowing resistance, thermal stability, heat resistance and aging resistance. It is mainly used for infant products, medical products and electronic products (keys).

brief introduction

Liquid silicone rubber is more safe and environmentally friendly, and can fully meet the food grade requirements. According to the position of functional groups (i.e. cross-linking points) contained in the molecular structure, liquid rubber with functional groups is often divided into two categories: one is remote claw liquid rubber with functional groups at both ends of the molecular structure; The other is the random distribution of active functional groups in the main chain, that is, those with functional groups in the molecular structure are called non telechelic liquid rubber. Of course, there are also those with both intermediate functional groups and end group functional groups. At present, the focus is on the research of remote claw liquid rubber. For liquid rubber, chain extenders or crosslinkers with appropriate functional groups should be selected according to the active functional groups contained in it.

purpose

Liquid silicone rubber can be used for trademarks, products, pacifiers, medical supplies, coating, impregnation and filling. It is used for silicone rubber products such as molding molds, injection molding processes and cake molds of crystal glue, polyurethane and epoxy resin. It is widely used as moisture-proof, consignment, insulation coating and potting materials for electronic components in the electronic industry, and plays the role of dust-proof, moisture-proof, shock proof and insulation protection for electronic components and assemblies. If transparent gel is used to encapsulate electronic components, it can not only play a role of shockproof and waterproof protection, but also can see components and detects the malfunction of components by using probes, and the damaged silicone gel can be re filled and repaired again. It can also be used to manufacture product forming molds of gypsum, wax, epoxy resin, polyester resin, polyurethane resin and low melting point alloy. It can be used in high-frequency embossing of artificial leather, modeling of shoe surface and bottom, manufacturing of Arts and crafts, reproduction of ceramics, toy industry, furniture, household electrical and electronic components, molding of gypsum and cement materials, molding of wax products Model manufacturing, material molding, etc.

Product characteristics

Liquid silicone rubber has excellent transparency, tear strength, resilience, yellowing resistance, thermal stability, water resistance, good air permeability, heat aging resistance and weather resistance. At the same time, it has moderate viscosity, easy operation and high transparency. It can see whether there are bubbles and other defects in the cast material in the mold, with linear shrinkage ≤ 0.1%, and the size of the copied product is precise.

How to use liquid silicone rubber

Liquid silicone rubber needs to be produced by injection machine, which is mainly used for infant products, medical products and electronic products (keys). There is also one that is directly put into the mold after a / b mixing, and then baked in the oven (the production and operation method of silicone rubber artificial milk). There are also silicone rubber and trademark glue used as liquid silicone rubber roller, which mainly depends on what products you use. Generally, liquid silicone rubber is used after vulcanization, but it can also be used as some kind of filler, such as electric insulation filler, liquid silicone rubber filler for breast augmentation, or as an additive in cosmetics.

type

1. Injection molded liquid silicone rubber (LSR): its full name is injection molded liquid silicone rubber, and the vulcanization equipment is injection molding machine. The injection molding machine has many advantages, such as very simple process flow (without manual processes such as batching, mixing, cutting and placing in the high-temperature glue process, only one worker needs to take the product), high product accuracy (all manual procedures are replaced by the machine before molding), high output (A / B glue is mixed for molding in a few seconds at a certain temperature), labor saving, power saving, material saving and so on, Can produce all high temperature glue products! It is a mainstream in the development of silicone rubber materials in the next few years.

2. Mold silicone rubber (RTV-2): used for forming molds of handicrafts and low alloy.

3. Electronic silicone rubber (rtv-t): used for moisture-proof, insulating backlight plate and heat dissipation materials of electrical components.

4. Sealant (RTV-1): commonly known as glass glue, it is used for building sealing, waterproof engineering, aluminum bonding, electronics and lighting, etc.