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Common polyurethane foaming process for car seats
Time:2021/10/27 10:19:51    

Thermal foaming

Thermal foaming refers to a foaming process in which the mold completes the reaction in the treatment furnace (the temperature in the furnace is generally between 220°C and 250°C, and the first point is at 180°C) after pouring. The foam produced by thermal foaming has the advantages of low density, good thermal aging performance and low mold cost. However, this process has disadvantages such as high energy consumption, more "mushroom heads" in the vent holes on the mold and a lot of waste of raw materials. At present, it is widely used in some European OEMs and domestic OEMs are particularly seldom used.

Cold foaming

The temperature of the cold foaming mold is relatively colder than that of the hot foaming mold (the temperature of the cold foaming mold is between 50°C and 70°C). The foaming reaction process is the same as that of the hot foaming, but the mold does not need to be placed in the treatment furnace to react. The mold is heated by hot water or electricity (mold temperature 50-70). The cost of the mold is higher, the energy consumption is lower and no raw materials are wasted. At present, domestic OEMs basically use this process.

Nude foaming

The foam is taken out of the mold, and the surface does not use a foaming process that absorbs/adheres to the fabric. The difference between it and the adsorption foam is that the mold does not have to absorb the fabric before the cast material, so the product will not be attached to the fabric. combine together. Basically, nude foaming is used on passenger car seats.

Adsorption foaming

It is widely used in construction machinery seats. It means that the foamed product absorbs the seat fabric in the mold cavity before the AB material is poured into the mold. The fabric is completely fitted to the mold cavity, and then the AB material is poured. . After foaming out of the mold, the process in which the foam and the fabric are firmly bonded together is called adsorption foaming.

PIP

  Similar to adsorption foaming, but the face cover of PIP should be sewn in advance, and then put the face cover into the mold to fix it, pour the chemical material into the sewn cover, and the chemical material reacts in the mold and initiates The foam will prop up the face cover. This foaming method is widely used on headrests and armrests, and the products made are more beautiful than hand-wrapped ones.

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