TPU is a polymer material formed by the reaction and polymerization of diisocyanate molecules such as diphenylmethane diisocyanate (MDI) or toluene diisocyanate (TDI) with macromolecular polyols and low-molecular polyols (chain extenders). Rubber powder is a powdered rubber material obtained by crushing waste rubber products. By blending TPU and rubber powder in a certain proportion, a functional waterproof material with excellent water resistance and moisture permeability can be prepared, which effectively reduces the cost of raw materials.
1. TPU material characteristics and uses
The molecular structure of thermoplastic polyurethane (TPU) is composed of rigid blocks obtained by the reaction of MDI or TDI and chain extenders.It has high tension, High strength, good toughness, abrasion resistance, water resistance, aging resistance, etc., with excellent waterproof and moisture permeability, has been widely used in medical and health, electronic appliances, industry and sports and other fields.
2. Features and uses of rubber powder
Rubber powder is a powdered rubber material obtained by crushing and processing waste rubber products. It has basic rubber elasticity, has a wide range of raw materials, low product prices, and is sustainable. At present, rubber powder has been widely used in sports plastic playgrounds, playgrounds, rubber floor tiles, waterproof membranes, waterproof coatings, road modified asphalt, rubber products and other fields. Rubber powder modified asphalt is one of the important applications.
3. TPU/rubber powder blending to prepare waterproof material
TPU has excellent mechanical strength and waterproof performance, low cost of rubber powder, and sustainable production. Research shows that blending 69.2% TPU, 30% rubber powder and 0.8 defoamer can prepare a functional waterproof material with good support performance and remarkable waterproof effect. The waterproof material prepared by blending TPU/rubber powder can be used for high-speed railway waterproof sealing layer and other occasions, reducing the damage to the subgrade layer by moisture in the high-speed railway, and effectively improving the durability of the high-speed railway system.
Processing waste rubber products into rubber powder is one of the main ways of recycling waste rubber, and the processing technology and environmental protection performance are better than processing reclaimed rubber. In-depth study of TPU material and rubber powder blending to prepare waterproof materials can further expand the application range of rubber powder, treat more waste rubber products, and is of great significance to the realization of waste rubber recycling. In actual production, the functional waterproof material made of TPU/rubber powder can also be used in many fields, and the editor will continue to discuss with you later.
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