Raw Material Spacer PU Foam Bra

Export Ming Ao raw material spacer PU foam bra

Ming Ao Sponge is a professional China Raw Material Spacer Pu Foam Bra manufacturer and supplier, if you are looking for the best Raw Material Spacer Pu Foam Bra with low price, consult us now! We supply the model 3070 pu foam which means 30 density and 70 hardness. It is widely used at women sport underwear. We are the top 5 bra foam supplier in China. First of all, our 3070 have a strong support for your bra. After the high temperature setting, it still remains the high resilience. However, some low quality foam from other some suppliers, the bra foam can not rebound any more under the same condition. There is a small detail you might need to taken into account: before the high temperature setting, you can not distinguish which foam is of good quality as they are the same density and hardness. Imagine if you make a bulk order and finally  realize the foam can not rebound after the high temperature setting, which results in a large loss. Therefore, it is cautious for you to cooperate with a reliable factory.

Specification of Raw Material Spacer Pu Foam Bra

what is pu foam for bra made of?

Polyurethane (PU) foam for bra is mainly made from PPG, POP ,isocyanate (TDI-80) and anti-yellowing agent. The four components react chemically to form foam that can be used for a bra foam.

The polyol component of PU foam consists of polyester or polyether polyols, which are complex organic compounds derived from petroleum. These compounds are typically mixed with other additives, such as catalysts, blowing agents, and surfactants.

The isocyanate component typically consists of methylene diphenyl diisocyanate (MDI) or toluene diisocyanate (TDI), which are highly reactive compounds derived from petrochemicals.  The isocyanate is typically combined with the polyol component through a process called polymerization, which causes the two to bond and form the foam. Actually, main different between pu foam and bra foam is if the anti-yellowing agent is added during the manufacturing.

The specific properties and characteristics of PU foam for bra can be adjusted by varying the type and amount of additives used, as well as the polymerization process itself. As a result, the raw material PU foam for bra can be tailored to meet the specific needs of female.

Does every pu foam factory can also make bra foam in China?

This is absolutely “NO”answer.

It seems pretty simple to manufacture bra foam theoretically by easily put some anti-yellowing agent inside. The fact is among all the pu foam factory in China, 10% only of them can successfully manufacture the bra foam, which might be unbelievable for you. Here is some reason I can indicate. Firstly, 90% of pu foam factory use the domestic TDI for the foaming, which is a simple mistake. 

Ming Ao Sponge Manufacturing CO., LTD use the Bayer TDI to guarantee the quality, even though the domestic TDI in China is much cheaper. Secondly, once the anti-yellowing agent is added, the percentage of PPG,POP and TDI will be changed, the balance of the chemical reaction will be broke which results in the defective foam. Last but not least, even if you edit your formulate finally, you might still cannot control the foam structure, because the structure is not controlled by formulate. Disorderly structure will reduce air permeability and finally the foam cannot pass the 4-Grade Yellowing Resistance Test.

Overall, factory which can manufacture the bra foam has higher level than those haven’t.