How to solve the problem of poor toughness of waterproof and breathable membrane?

1. Now the most common method is the toughening method: mixing new materials and recycled materials in equal proportions

Use equal proportions of new materials and recycled materials to mix together. This method can improve the toughness of the recycled materials because of the good toughness of the raw materials. This is also the most common toughening method. And also save money.

2. There is a product on the market for toughening waterproof and breathable membranes: toughening agent

Adding a toughening agent to the recycled material can make the recycled material play a toughening role.

Tougheners are generally divided into: granular tougheners, liquid tougheners, and powder tougheners. The amount of toughener added is different for each brand. Prices are also different. A good toughening agent, it can make the toughness of the recycled material the same as that of the raw material, sometimes better than the toughness of the raw material.

3. In addition to the above two toughening methods, there is also the addition of EVA

EVA: Ethylene-vinyl acetate copolymer is referred to as EVA, and the general vinyl acetate (VA) content is 5% to 40%. Compared with polyethylene, EVA can also be added to recycled materials because of the introduction of vinyl acetate monomer into the molecular chain, which reduces high crystallinity and improves flexibility, impact resistance, filler compatibility and heat sealing performance. EVA can improve the flexibility and impact resistance of recycled materials. Then improve the resistance of the waterproof and breathable membrane.