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How does foam manufacturer in Linyi produce foam materials?

Release time: 2018/8/30 18:04:59

Foam material is a familiar plastic material. It has the characteristics of light weight, strong processing performance, and so on. Manufacturers should strictly control the production process of foam materials and ensure the quality of foam materials. How does foam manufacturer in Linyi produce foam materials? What about it?

There are two main molding processes for foam materials. One is to directly place plastic containing foaming agent into the mold cavity for heating and pressurizing, and then to form foam molded plastic products at one time. The other method is to first foaming the plastic containing foaming agent, that is, pre foaming plastic, then placing it in the mold cavity for heating, pressurizing, foaming and pressurizing molding. Next we will briefly introduce the pre foaming plastic process for you.


 How does foam manufacturer in Linyi produce foam materials?


1. the foaming agent is dispersed uniformly in the polymer, and the polymer is usually liquid or molten. The foaming agent can form a real solution in the polymer, or even disperse in the polymer to form a two phase system. The mixing of blowing agent and polymer material is usually done by mixing or opening. When selecting blowing agent, we must consider that the temperature of mixing is lower than that of blowing agent.

2. after the formation of a large number of single bubbles, the system is transformed into a system of gas dispersed in the liquid. In the system, nucleating agents are often needed to promote the formation of large numbers of small bubbles. Nucleating agents are usually very fine inert particles. Calcium carbonate and kaolin carbon black can be used as nucleating agents.

3. the bubble formed initially is increasing, as more gas diffuses and enters the bubble through polymer. If the time is long enough, a single bubble will contact and fuse with each other; if froth formed by intercellular interconnection, it will be open cell foam. If the foam formed by disconnected bubbles is a closed cell foam, if the bubble fusion is allowed to proceed without restriction, the foam will collapse. Therefore, attention should be paid to controlling the time and types of bubbles.

4. when the viscosity of the polymer increases, the decomposition of the foaming agent is basically complete, and the bubble will not increase again, the foam will stabilize and become a stereotyped product. The viscosity of the polymer can be increased by cooling, cross-linking or other methods.

In short, Linyi foam manufacturers In production, attention should be paid to strictly controlling the production process and ensuring the stable performance of foamed plastics. Jin Shun foam is a reliable foam manufacturer. There are many kinds of foam products, such as foam particles, foam board, foam box, etc., which are widely used. Friends in need are welcome to contact us.



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