The arrival of silicone molding has cracked the plasticizer

The emergence of plastics has greatly promoted the development of human society. It can be said that our current society is inseparable from the use of plastics, but the turmoil of plasticizers has once again caused our concern about plastic safety issues. How to solve this problem has become the focus of our attention. Fortunately, the development of silicone molding compounds has given us the dawn of solving this problem.

The stones that can be seen everywhere seem to have little use, but they lead the development of new materials technology. Silicon, an element that plays a key role in the development of new materials technology, is the main element of the stone that we see everywhere. It has not only set off a new technological revolution in the electronics, communications and other industries, but has also played an increasingly important role in the development of new materials technologies such as the plastics industry.

The traditional plastic product is a synthetic polymer compound, which is a material obtained by synthesizing or condensing a monomer raw material such as ethylene or vinyl chloride, and is composed of a synthetic resin and a filler, a plasticizer, a stabilizer, a lubricant, and a colorant. And other additives.

In the course of use, harmful small molecules such as plasticizers in plastic products and harmful gases such as hydrogen chloride volatilized cause great harm to human health.

In order to solve this problem, the research and development of silicone molding compounds has attracted worldwide attention.

Silicone molding compound is a new type of plastic based on silicone material or a kind of auxiliary agent. It is a thermosetting plastic. Compared with commonly used thermoplastics, silicone molding compounds do not contain harmful substances such as plasticizers. The main constituent materials include basic silicone resins, fillers, pigments, curing agents and the like.

For the processing of silicone molding products, the basic silicone resin and the filling material are usually kneaded and kneaded in advance, and then additives such as a curing agent and a releasing agent are added, and the mixture is quickly mixed and cooled to prepare a preform or a mixture of a suitable shape. The powder is then processed by a compression molding or transfer molding process using a dough or a powder, and finally the shaped article is post-cured to achieve optimum use performance.

Silicone materials used in the field of plastic processing are mainly silicone polymers and silane coupling agents. A silicone polymer is a type of polymer in which a silicon atom and an oxygen atom are alternately linked to form a skeleton, and different organic groups are further bonded to a silicon atom. It has a silicon-oxygen polymer skeleton similar to a silicate structure, and has organic side chains such as a methyl group, a phenyl group, a vinyl group, an alkoxy group, etc., so that the organic silicon material structure contains both organic groups and It contains an inorganic structure, so it is a special polymer material with a semi-organic semi-inorganic structure, which has unique and excellent properties.

The special polymer structure of silicone polymer gives it a series of excellent properties: high temperature resistance, moisture resistance, low surface energy, high dielectric strength, low dielectric loss, weathering resistance, etc. The silane coupling agent is a type of highly reactive organosilicon compound composed of an organic group bonded to a silicon atom and a group having a hydrolytically active function. The specific function of the silane coupling agent is that the organic group is affinity with the related kind of polymer, and the hydrolyzable group of the silane coupling agent is chemically reacted by hydrolysis and condensation to form a chemical bond with the surface of the polar substrate or to generate chemistry. Cross-linking, thereby exerting functions such as adhesion, reinforcement, cross-linking, etc., applied to sealing, bonding, coating, and the like.

Silicone products used in the field of plastic processing can be divided into two categories: one is the application of silicone as the main material of plastics, mainly based on silicone resin, combined with other auxiliary materials, and formed into silicone plastics. Products. The main products include silicone molding compounds, silicone laminates and silicone foams.

The other is used as a plastic auxiliaries and auxiliary materials, mainly including cross-linking agents, lubricants, dispersants, mold release agents, filler treatment agents, reinforcing agents, tackifiers, cell control agents, and the like. Due to the characteristics of the silicone material itself, the silicone component in the additive is compatible and different from the carbon-carbon chain polymer of the plastic substrate, so that it can be mixed with each other to play a unique role without being polymerized by the base. The object completely "flooded assimilation" failed.

Therefore, the application of a small amount of silicone auxiliaries can not only increase production costs or even reduce costs, but also achieve the desired effect of improving process conditions and improving the performance of plastic products.

Relevant research shows that silicone materials are basically non-toxic or very toxic to the human body. The use of silicone materials in the plastics processing industry, whether as a main material or related auxiliary additives, greatly improves the products. At the same time, it also reduces the use of traditional hazardous auxiliary additives, greatly reducing the harm of plasticizers, fillers and traditional plastics. The harm of plastic plasticizers and other ingredients to the human body is attracting more and more attention. To solve the safety problem of plastics, the development of silicone molding compounds will be an inevitable trend in the development of plastics industry.

At present, silicone materials have been widely used in food safety, medical and health fields, and the safety and reliability of silicone plastics have been proved. In order to solve the problem of excessive plasticizer in liquor, we must start from the aspect of external pollution. Equipment used for the production of wine, packaging materials, transportation tools and storage materials must contain more or less harmful substances such as plasticizers. To solve these problems, it is possible to choose a new material such as silicone molding compound.

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