Ppu is an amorphous thermoplastic material.

　　Advantages:

　　1. Good physical properties, bending resistance, good softness, high tensile strength and air permeability.

　　2, very light, fireproof, waterproof, moth-proof, mildew-proof and crack-proof.

　　3, high air permeability, high temperature permeability up to 800014000g/24h/cm2, high peeling strength and high water pressure resistance, which is an ideal material for the top and bottom layers of waterproof and breathable clothing fabrics.

　　5. pu products can be nailed, sawed, planed, milled, bent and shaped without cracking, deformation and moth-eaten.

　　6, waterproof: no water absorption, no water seepage, no deformation, with mildew resistance.

　　Disadvantages:

　　The price is high, because the price of some PU fabrics with special requirements is generally 2-3 times higher than that of other materials, and PU materials can only be scrapped after 4-5 times, so the cost performance is low.

　　PPU is also called the definition of thermoplastic polyurethane (a kind of plastic). Plastic is a polymer organic material with resin as the main component, which is molded into a certain shape at a certain temperature and pressure and can maintain the established shape at room temperature.

　　Resin refers to an organic polymer that usually has a range of transformation or melting when heated, is fluid when transformed by external force, and is solid or semi-solid or liquid at room temperature. It is the most basic and important component of plastics. Broadly speaking, any polymer that is the basic material of plastics in the plastic industry can be called resin. PPU is light in weight, high in specific strength, excellent in electrical insulation, excellent in chemical stability, good in antifriction and wear resistance, excellent in light transmission and protection, and excellent in shock absorption and noise reduction;

　　PPu material is polyurethane material, which is short for polyurethane and is a polymer material. Polyurethane is a new organic polymer material, known as "the fifth largest plastic", and is widely used in many fields of national economy because of its excellent performance.

　　Pu is an artificial synthetic material, which has the texture of genuine leather, is very durable and cheap. At the same time, the toughness, air permeability and wear resistance of polyurethane are further strengthened by adding superfine fiber into the material.

　　Pu fabric is a kind of synthetic material, which was invented and created by people now.

　　1. PU is bending-resistant, soft, with high tensile strength and good air permeability;

　　2. This is a polymer, which is called artificial leather in China.

　　3. PU resin is a commonly used PU artificial leather. Artificial leather and synthetic leather are a large category of plastic products in China, which have been widely used in various departments of the national economy.

　　4. PU has the advantages that the coating is soft and elastic, and the coating strength is high, so it is suitable for very thin coatings; Porosity, moisture permeability, air permeability, wear resistance, moisture resistance and drying resistance of the coating.

　　Expansion: PU coatings are divided into PU polyurethane, polyether polyurethane, aromatic isocyanate polyurethane and aliphatic isocyanate polyurethane according to their components. According to the medium used, it can be divided into solvent-based and water-based types. Solvent-based PU coating PU resin Solvent-based PU has high strength and good water resistance, but it is toxic and flammable. According to the composition, it can be divided into two categories and one category. The two-component product includes a prepolymer, which is a hydroxyl-terminated prepolymer and is obtained by reacting isocyanate with oligomeric polyol.

　　PPU, also called thermoplastic polyurethane, is a thermoplastic TPU elastomer, which is made of MDI containing NCO functional groups, POLYOL containing OH functional groups and 1.4BG through extrusion and mixing.

　　Features: Good elasticity, good physical properties and good mechanical strength.