Wires are indispensable materials for users in the process of using electricity. The quality of the wires is directly related to the safety of electricity used by thousands of households. Therefore, when purchasing or selecting, how to quickly and accurately check the quality of the wire is the skill that the majority of electricians must master. 1 weight. Good quality wires are generally within the specified weight range. For example, the commonly used plastic insulated single-strand copper core wire with a cross-sectional area of ​​1.5mm2 is 1.8-1.9kg per 100m; the plastic insulated single-strand copper core wire of 2.5mm2 is 2.8-3.0kg per 100m; the plastic of 4.0mm2 The insulated single-strand copper core wire has a weight of 4.1 to 4.2 kg per 100 m. Poor quality wires have insufficient weight, either insufficient length or excessive copper core impurities. 2 copper. The copper core of the qualified copper core wire should be purple, shiny and soft to the touch. The copper core of the inferior copper core wire is purple-black, yellowish or white, with many impurities, poor mechanical strength, poor toughness, and will break when a little force is applied, and the wire is often broken. When inspecting, you only need to peel off the wire 2cm, and then use a piece of white paper to slightly rub the copper core. If there is black substance on the white paper, it means that there are more impurities in the copper core. In addition, the inferior wire insulation layer seems to be very thick, and in fact it is mostly made of recycled plastic. Over time, the insulation layer will age and leak. 3 manufacturers. Counterfeit and shoddy wires are often three-nothing products, but there are also ambiguous origins and other marks, such as those made in China, manufactured in a certain province or city in China, which is actually equal to the unmarked place of origin. 4 prices. Due to the low production cost of counterfeit and shoddy wires, traders often sell at low prices with low prices and good prices when selling. Thermoplastic Polyurethane (TPU) is a type of polymer resin that is known for its flexibility, durability, and versatility. It is a thermoplastic material, which means it can be melted and reprocessed multiple times without losing its original properties. Tpu For Shoes Materials,Colorful Tpu Shoes Materials,High Temperature Tpu,Raw Tpu Material XUCHUAN CHEMICAL(SUZHOU) CO., LTD , https://www.xuchuanpu.com
TPU is commonly used in various industries, including automotive, electronics, footwear, and sportswear. It is often used to make products such as phone cases, cables, hoses, seals, gaskets, and inflatable structures.
Some key properties of TPU include:
1. Flexibility: TPU has excellent flexibility, allowing it to bend and stretch without breaking. This makes it suitable for applications where flexibility is required, such as in shoe soles or flexible electronic components.
2. Abrasion resistance: TPU has good resistance to abrasion, making it suitable for applications that require durability and resistance to wear and tear.
3. Chemical resistance: TPU is resistant to many chemicals, including oils, solvents, and greases. This makes it suitable for applications where exposure to chemicals is expected.
4. Weather resistance: TPU has good weather resistance, meaning it can withstand exposure to sunlight, moisture, and extreme temperatures without degrading or losing its properties.
5. Adhesion: TPU has good adhesion to various substrates, allowing it to be easily bonded or laminated with other materials.
Overall, TPU is a versatile material that offers a balance of flexibility, durability, and chemical resistance, making it suitable for a wide range of applications.