Three production processes of polyurethane foam

Polyurethane Production of styrofoamI believe many people are paying more attention, I would like to know more about it todayWeigu editor will learn about it with you The production and processing technology of polyurethane foam.

Polyurethane foamatIn our livesThere are various realitiesFunction, like between the baffle and the suspended ceiling Gap, the cavitation between windows, door frames, walls, the gap between the roof and the chimney, Air conditioning holes, mouse holes, etc. are all acceptable Use it to repaircaulk. Now,As the definition of “environmentally friendly home furniture” has gradually become known to all, green and environmentally friendly Design, green new decorative materials, green furniture, etc. also followfollowingpopularMarket, Foam caulkalsois listed as An energy-saving and environmentally friendly material, this productOverseasThe market is huge, there is also a large sales market in the Chinese market.

Today, let us introduce in detail a type of interior decorationThe essential material is a cross-fusion of polyurethane foam expertise and spray expertise Matter, and to itProduction technology andProfessional skills make a detailed introduction.
Polyurethane foam foaming processing technology is divided into the following three types:
1. PreliminaryThe polymer foaming process is to combine blackmaterial and white material are first made into a prepolymer, and then water, Metal catalysts, surfactants, preservatives, etc. are mixed and foamed under high-speed stirring,After curing, it can be matured at a certain temperature font>.
2. The foaming process of the semi-prepolymer method is to combine a part of polyether polyol (white material) and diisocyanate (black material) is first made into a prepolymer, and then the other part of polyether or polyester polyol and diisocyanate, water, metal catalyst, surfactant, preservative, etc. Mix in, mix and foam under high-speed stirring.
Three. One-step foaming processispolyether or polyester polyol (white Material) and polyacrylate (blackmaterial), water, metal catalysts, surfactants, foaming agents, preservatives and other materialsmixed together, after mixing at high speedChoose abrasive toolsFoaming, belongs to artificial foaming technology.
　Summary and summarize the main production processes of polyurethane foam span>is divided into two types, one is manual foaming, and the other is mechanical foaming. One is old and the other is new, one is manual and the other is mechanical, they are polyurethane foamProductionTwo distinct representatives in the history. Let’s take a look at the different characteristics of these two foaming methods.

1. If you do not have the When the number of foam machines and molds is small and the demand for foam products is not large, manual pouring can be used for molding. Technical foaming has low labor productivity, low material utilization rate, and a lot of material adheres to the container wall. Yield is also lower. The development of new formulas, as well as routine testing of raw material systems and formula debugging before production, generally require small tests in the laboratory, that is, technical foaming experiments. In production, this method is only suitable for small-scale on-site temporary construction, the production of a small number of unshaped products, or the manufacture of some foam plastic samples.
2. Mechanical foaming is a method that relies on intense mechanical mixing to create cells in polymer emulsions, suspensions or solutions. For mass production and large-scale construction, foaming machines are generally used for mechanized operation with high efficiency. The mechanization development direction of polyurethane foam is also an important manifestation of the development of modern social science.