About TPU film
- Categories:Industry news
- Time of issue:2021-04-20 09:17
About TPU film
- Categories:Industry news
- Time of issue:2021-04-20 09:17
1. Accuracy of TPU thin film thickness
In the international mass production of TPU film thickness error is still large, in this case, if you want to win more market share, advanced production line with good measurement and control technology is needed. But I am here, or very responsible to say: the thickness of TPU film is really difficult to accurately control! Because the TPU film manufacturer belongs to the elastomer, after drying and dehumidifying through the screw mixing and curing after the die head out of the film, any factor in the middle including the instability of raw materials may lead to uneven thickness of the film. In general, the industry is said to be 10 silk TPU film thickness plus or minus tolerance 1 wire (0.01mm) is very normal, of course, this is also related to the thickness of the film. The thinner the TPU film, the smaller the tolerance of thickness it can accept. However, testing equipment for advanced TPU film manufacturers is often very expensive, so for many small and medium-sized TPU film manufacturers, control of film thickness and rejection rate is a headache. The growing use of lightweight materials in the automotive industry to improve energy efficiency and reduce carbon emissions is expected to drive the growth of the TPU film market. It can be used in the production of auto parts to help reduce body weight (by about 40%). They can also replace rubber parts in cars. For automotive applications such as doors and sound-absorbing panels, instruments and vibration panels, seats and airbags. Replacement or aftermarket is expected to be the new focus of automotive industry demand for TPU films. Consumers are extremely price sensitive these days, and price plays an important role in the marketplace. TPU film market price trend in Europe, North America and Asia Pacific region, 25 to 35 percent higher.
Two, how much high temperature resistance of TPU film?
Because the raw material ratio and reaction temperature of TPU film are not easy to control, many customers complain about the thickness error of TPU film products. Conventional TPU is generally said to be heat resistant to 80℃, which means that its long-term use temperature cannot exceed 80℃, otherwise its service life will decline more seriously. There are also heat-resistant TPU, which is said to be up to 130℃. In addition, there are TPU modified with glass fiber, which has a very high heat-resistant temperature. TPU film is a material containing -NH-COO- group in the molecule. Long chain diol and isocyanate components constitute soft segment, while short bond diol and isocyanate components constitute hard segment. Many characteristics of TPU depend on the type of long chain diol, and its hardness is adjusted by the proportion of hard segment. TPU elastic band its light aging can be improved by adding light stabilizer, after all, is plastic, general temperature resistance is generally at 100℃ left du right, but if it is necessary to work in a high temperature environment for a long time requires special materials, is a special enhanced polyurethane high temperature resistance, oil resistance, often used in automotive oil cups and so on. In general, if heat resistance is required, it is required for dimensional measurement. The softening point of the card can be tested according to relevant standards. The global softening point is used to test the softening point of asphalt pavement. It is commonly used in TPU hot melt adhesives. The data from the capillary rheometer seem to have four values. The detection principle is only to test the state of TPU at different temperatures, characterized by softening point and flow point under constant pressure. Thermodynamic properties of TPU.
TPU film forming and application
TPU films are mainly divided into the following categories according to their applications
1. Shoes material
TPU is used in footwear mainly because of its excellent elasticity and wear resistance. Shoes containing TPU are much better than ordinary shoes in terms of wearing comfort. Therefore, they are widely used in high-grade shoes, especially some sports shoes and casual shoes.
2. The film
TPU is becoming more and more popular because of its superior performance and environmental protection concept. At present, wherever PVC is used, TPU can be a substitute for PVC. TPU films can not only be bonded to various fabrics, but also can be used to produce products with clear profile and stable size by vacuum thermoforming. With the increasing awareness of environmental protection in China, TPU has been applied more and more widely. The fastest growing areas are: uppers lining, thermal underwear, transparent underwear, transparent shoulder straps, elastic bands and breathable medical tape.
3. The adhesive
TPU adhesive is a kind of polyurethane adhesive. The use of polyurethane adhesives in Europe and the United States has been quite common, especially in the use of footwear adhesives, almost use polyurethane adhesives. The use of TPU adhesives in China is to obtain polyurethane adhesives after TPU dissolution and processing. In the use of TPU adhesive, mainly in Guangdong, Fujian, Zhejiang, Shanghai four main areas.
4. The hose
Because TPU hose has soft, good tensile strength, impact strength resistance to high and low temperature, so in China TPU hose is widely used in aircraft, tanks, cars, motorcycles, machine tools and other mechanical equipment, such as gas and oil hose. The main TPU hose manufacturing enterprises are concentrated in Guangdong, Zhejiang, Jiangsu, Shandong, Hebei and other places.
5. The electric wire
TPU provides tear resistance, wear resistance and bending characteristics, high and low temperature resistance is the key to cable performance. Therefore, in the Chinese market, TPU for advanced cables, such as control cables and power cables, is used to protect the coating materials of complex cables and is increasingly widely used.
TPU with its high mechanical strength, excellent wear resistance, excellent oil resistance, acid and alkali resistance, outstanding anti-compressibility and make it in the roller has a large number of applications. There are mainly the following kinds of domestic roller: industrial roller, household roller, sports equipment wheel, medical equipment wheel, toy wheel.
7. Plastic modification can be used for PA, ABS plasticizing, but the cost is higher
The main advantages of TPU ink are: excellent adhesion, low viscosity, good flexure resistance, excellent wear resistance, high gloss, weather resistance, can resist any sun exposure including UV irradiation, excellent toughness and durability in a variety of applications. Inks made from both aromatic and aliphatic TPUs can be used in a variety of climates and environmental conditions, providing stability and excellent performance. TPU ink has smooth appearance, good shading and alcohol resistance, strong adhesion and other characteristics, mainly suitable for TPU and other plastic surface decoration. Such as mobile phones, laptop computers, shoes, car leather chairs, sofas, senior leather goods, handbags, inflatable entertainment TPU products, umbrellas, raincoats and other TPU ink for metal, glass, adhesion rate is poor, easy to drop paint.
Scan the QR code to read on your phone