1, film and sheet
Polyurethane films are produced by extrusion, calendering and blow molding processes, ranging in thickness from a few microns to a few millimeters, and can be made in a variety of colors by adding pigments. Due to the characteristics of polyurethane molecular structure, people can change the elasticity, hardness and hydrophilicity of polyurethane by adjusting the proportion of polyurethane block components. Therefore, polyurethane thin film, like polyurethane elastomer, has excellent high tension, high tension, strong toughness and aging resistance. At the same time, it has excellent biological and blood compatibility and chemical resistance. Widely used in medical and health, high-grade textile fabrics, industry and other fields.
Polyether TPU can also be used to produce waterproof and breathable film, with environmental protection, breathable, waterproof and other functions. TPU film thickness from a few microns to a few millimeters, high, medium, low moisture permeable film, widely used in packaging, clothing fitting, shoulder straps and shoe materials and other fields. Such as sports shoes, mountaineering shoes, snowshoes, golf shoes, skate shoes and other footwear fabric and inner material, TPU film breathable moisture permeability and low temperature flexibility, can give footwear other materials incomparable comfort.
The medical and health field mainly uses thermoplastic polyurethane film, such as operating clothes, medical gloves, medical pads, ice packs, bandages, plasma belts, condoms, wound dressing, artificial organs and other aspects. Waterproof and breathable polyurethane medical gloves provide excellent water vapor permeability, bacteria resistance and comfort. Traditional wound dressings have many shortcomings, and the use of polyurethane micropores and hydrophilic membranes can make wound dressings have good breathable and absorbable functions. Polyurethane's good biocompatibility can also be used as skin delivery dressings, which can not only effectively block the unnecessary diffusion of active components in drugs, but also ensure that the active components act on the skin at a certain rate. At present, it has been used in Dalium abroad. It is expected that we will have a huge market in the future.
Polyurethane film is optically transparent, soft to the touch, high extensibility, durable, easy to process and waterproof and breathable. It is widely used in daily life as a high-grade or special textile fabric. Polyurethane film is used as the fabric of medical clothing, which has the advantages of breathable, anti-bacteria, anti-liquid penetration, long-term washing and steam sterilization conditions will not degrade and reasonable price. The earliest polyurethane film and coating was first used in agriculture, construction, forestry, mountaineering and sea and air rescue and other outdoor workers clothing, and then gradually expanded to footwear.
At present, polyurethane is widely used in footwear, such as all kinds of shoes, especially sports shoes or special functional footwear fabrics and inner materials; In recent years, polyurethane film has been increasingly used in the production of clothing and fashion. The clothes made of breathable polyurethane film material not only have respiratory function, but also can resist static electricity.
The dedicated Tpus also meet the requirements of the German Health Commission for food contact materials and the US Food and Drug Administration.
2, TPU composite leather
Polyurethane film is used in the production of composite fabric, as home clothing fabric, can play a protective role at room temperature, can have good moisture permeability above room temperature.
In the industrial field, polyurethane composite leather is often used to make fire protection, heat insulation, sound insulation materials, aircraft parts and decoration, auto parts and waterproof stickers, compression seals, conveyor belt, insulation board, safety bulletproof glass. Such as the United States will be made into car care film products, used in the hood leading edge, car front and rear bumpers, door door under the coaming, door lock handle and other cladding, avoid stone, friction to protect the car surface paint.
TPU composite leather generally has good optical transparency and light stability. Many manufacturers in our country also use the imported polyurethane films to package and protect the interior and exterior of automobiles. Britain has developed a bulletproof glass for aircraft box bulletproof car, is made of multi-layer polyurethane film composite. In addition, polyurethane based plastic film composite leather is also used in mold industry, metal and weapons corrosion protection.
3. TPU pipe
Tpus can be made into many different types of tubing. Polyether ester type and polyether type TPU have a series of advantages, such as high elongation, good hydrolysis resistance and microbial resistance, excellent mechanical properties (tensile strength and tear strength), so they are suitable for the lining of fire hose. This kind of fire hose is lighter and easier to operate than traditional fire hose.
The tube made of TPU inner layer is very useful in conveying sand, stone and slurry. Its good wear resistance and puncture resistance make the tube have a relatively long life and save more materials.
TPU hose has soft, good tensile strength, impact strength and high temperature resistance, so in China, TPU hose is used for aircraft, tanks, cars, motorcycles, machine tools and other gas, oil hose.
4. TPU shoe material
Because TPU has high wear resistance, puncture resistance, longitudinal bending resistance and low temperature impact strength, it is often used as the outer material of ski shoes.
The tear resistance and crack propagation resistance of TPU are the best among plastic materials. For example, ski shoes commonly used Shore hardness 50D~66D, Young's modulus of 100~600MPa TPU, and according to the performance requirements of different parts of the selection of appropriate TPU brand. Skates are also commonly made of Tpus because of their high resistance to low temperature impact.
The soles of many sports shoes are made of TPU material, which is especially popular in football shoes. Commonly used Shore hardness 85A~90A polyester TPU, because it has extremely excellent wear resistance and cutting resistance. In addition, TPU material can also be soft and flexible, and the comfort of shoe lining and insole is higher than that of other materials. Therefore, it is highly used in sports shoes and casual shoes.
5. Automobile parts
Because TPU has good resilience, cutting resistance, weather resistance, oil resistance, so it is very suitable for the automobile industry, has become one of the most used plastic varieties on the automobile.
According to the different components of the car, TPU foam, elastomer, adhesive and other different forms and performance to adapt to the requirements of the car, such as TPU foam with the change of the formula, with light weight, heat insulation, good resilience, good comfort, low temperature performance, durability, safety and shock absorption of higher characteristics, its advantages are not compared with other materials.
BASF has developed Elas, a TPU skin material for automotive interiors