I just bought a mobile phone protective case two days ago. I saw on the packaging instructions that the production material is TPU. When I held it in my hand, I thought it was made of plastic, so I immediately became interested in the TPU material. What is tpu material? Is tpu material a plastic? Is tpu material safe and environmentally friendly? I believe many friends have some doubts about these issues. Let’s take a look!
What material is tpu?
Tpu is the abbreviation of Thermoplastic Urethane, and its Chinese name is thermoplastic polyurethane elastomer. This is one of the building materials. In fact, it is also a common material. TPU has strong high tension and high tensile force. It is a mature environmentally friendly material and has received relevant certifications from international green environmentally friendly materials.
Characteristics of tpu materials:
1. High wear resistance: It can be seen from the comparison of the Taber wear index of tpu and other materials.
2. Wide range of hardness: By changing the ratio of each reaction component of TPU, products with different hardness can be obtained, and as the hardness increases, the product still maintains good elasticity.
3. High mechanical strength: TPU products have outstanding load-bearing capacity, impact resistance and shock absorption performance.
4. Good processing performance: TPU can be processed using common thermoplastic material processing methods, such as injection, extrusion, calendering, etc. At the same time, TPU and certain polymer materials can be processed together to obtain polymer alloys with complementary properties.
5. Outstanding cold resistance: TPU has a relatively low glass transition temperature and still maintains good elasticity, flexibility and other physical properties at minus 35 degrees.
6.? Resistant to oil, water and mold.
7. Good recyclability.
TPU manufacturers:
The most commonly used TPU brands on the market currently include the following:
High-end brands (four major international brands): 1 Borun (Novo? Korea SK? Dow); 2 BASF; 3 Bayer; 4? Huntsman
Mid- to low-end brands: 1 Taiwanese materials (COTING? Hongyi? Sanhuang? Kunzhong) ;2 Mainland China (Yantai Wanhua?)
TPU products are widely used:
A. Footwear: sports shoes logo, sports shoe air cushion, mountaineering shoes, snow shoes, golf shoes , skates, fabrics and lining materials.
B. Ready-made clothing: snowcoats, raincoats, windbreakers, cold-proof jackets, field uniforms, diapers, menstrual pants, and other fabric composite materials (waterproof and breathable).
C. Medical products: surgical gowns, caps, shoes, hospital mattresses, ice packs, bandages, plasma bags, surgical dressing strips, masks, and other fabrics and lining materials, operating bed airbags.
D. National defense supplies: aircraft fuel tanks, weapons sealing films, tent windows, military water bags, life jackets, fabrics and inner fabrics for inflatable boats, etc., airbags.
E. Sports goods: football surface and liner, inflatable bed, drinking water bag, ski gloves (waterproof bag), wetsuit, snowsuit, swimsuit, snowboard, trademark, airbag, sports shirt, slimming garment and other fabrics and lining materials.
F. Industrial supplies: trumpet drum paper, rubber edges, waterproof strips, sound insulation materials, fireproof materials, fireproof clothing?, finished firefighting clothing, fireproof cloth and other fabrics and lining composite materials.
G. Other uses: Mobile phone buttons, plastic inflatable toys, sheets, tablecloths, shower curtains, furniture cloths, aprons, pianos, computer keyboards, laminates and other fabrics and lining materials.
Two forms of TPU materials:
1. TPU film/sheet
TPU film is widely used in sports shoes: soles and uppers Trademark decoration, air bags, air cushions, oil bags, etc. Nowadays, there are two trends in the application of TPU films on sports shoes: one is the popular trend caused by Nike sports shoes, that is, the TPU film is screen printed and colored, and then formed with high frequency and bonded to the upper. Decorate it to achieve a special decorative effect. The second is to use a waterproof and moisture-permeable TPU film to fit the shoe material cloth to achieve a waterproof and moisture-permeable effect.
2. TPU granules
Thermoplastic TPU elastomer is made of MDI containing NCO functional groups and POLYOL and 1.4BG containing OH functional groups, which are extruded and mixed. , due to its good elasticity, good physical properties, and excellent mechanical strength, it is widely used in processing methods such as injection, extrusion, calendering, and dissolution into solution-type resin. It is a plastic material often used by plastic processing industry, and its products include It covers the scope of industrial applications and people's livelihood necessities.
Shrinkage rate of TPU material
The shrinkage rate of TPU material is related to the hardness. The hardness is high and the shrinkage is small. The hardness of 80-90 is about 0.8%. A single TPU piece is generally a small piece and shrinks Size doesn't matter.
How much does TPU material cost per ton?
TPU materials are divided into imported and domestic TPU, so the prices of imported and domestic products are different. The general market price of TPU materials imported from abroad with genuine original packaging At about 30,000-50,000 per ton, domestic TPU is much cheaper than domestically produced TPU. Generally, the market price of ordinary TPU is about 25,000-30,000 per ton, excluding recycled TPU materials.
Have you ever seen your shoes, rain gear or other supplies made of TPU material before? Have you also worried about the safety and environmental protection of this material? I believe that through the above explanation, everyone has already Don't worry, TPU is a new type of environmentally friendly material. The above is the relevant content about what material TPU is, I hope it can be helpful to everyone! Tubatu Decoration Network, the leader in the entire industry.
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