TPU Characteristics (Part 3) - Guangyuan Ruifeng New Materials

Category: TPU (popular science, no product)

Release Time: 2020-06-16

Summary: Membranes exhibit excellent low-temperature resistance, generally reaching -30 degrees Celsius, and can replace PVC, which becomes brittle at low temperatures. Suitable for products related to cold regions. Polyether offers even better cold resistance.

12. Low-Temperature Performance

The film exhibits excellent low-temperature resistance, generally reaching -30 degrees Celsius, replacing the use of ordinary PVC which would become brittle. Suitable for products related to cold regions. Polyether has better cold resistance.

13. Anti-Mildew and Antibacterial Properties

The film has excellent anti-mildew and antibacterial properties, resisting Penicillium, Aspergillus, Cladosporium, mixed spores, and other microorganisms.

14. Gas Diffusion Performance (Airtightness)

The film is easily welded using high-frequency waves or heat pressing, therefore widely used in inflatable products. The gas diffusion coefficient refers to the diffusion rate of gas through a specified area of the sample under certain temperature and pressure. The permeability of the same material to different gases sometimes varies greatly; polyester products have better airtightness than polyether products.

15. Biomedical Properties

The film has excellent biocompatibility, is non-toxic, non-allergenic, non-irritating, and pyrogen-free, therefore widely used in medical, hygiene, and related products, as well as sports protective equipment.

16. Waterproof and Breathable

Unlike microporous membranes, TPU is a hydrophilic film. Hydrophilic films are composed of single-component copolymers, with hard and soft segments arranged alternately along the polymer chain. The hard segments are hydrophobic, preventing water droplets from passing through, providing waterproofness; the soft segments are hydrophilic, interacting with water molecules, using hydrogen bonds and other intermolecular forces to adsorb water molecules on the high-humidity side and desorb them on the low-humidity side, achieving breathability. The process of breathability is "adsorption—diffusion—desorption".

A corona treatment that enhances the adhesion of the substrate surface. Corona treatment has a time effect; the treatment effect will decay to varying degrees depending on the film type, storage environment humidity, and storage time. For films not used immediately after treatment, the treatment power should be increased appropriately, the treatment depth should be increased, and they should be stored in a low-temperature, dry environment as much as possible.

17. Anti-Static Treatment of Film Surface

When two solids in different physical states come into contact and friction, their surfaces will undergo charge redistribution. After separation, each solid surface will carry an excess of positive (or negative) charge compared to before contact; this phenomenon is called static electricity. The general method for removing static electricity is to use surfactants, such as antistatic agents, to reduce the surface resistance of the polymer. Because such additives are hygroscopic, they absorb moisture from the atmosphere on the surface of the polymer, forming a very thin conductive film, allowing static electricity to dissipate quickly. Water plays an important role in this process; as the atmospheric humidity increases, the surface conductivity of the polymer also increases, allowing static charges to dissipate quickly, resulting in better anti-static properties.

Keywords: TPU Characteristics (Part 3) - Guangyuan Ruifeng New Materials

Related Solutions

Previous: TPU Characteristics (Part 2) - Guangyuan Ruifeng New Materials

Next: Technical Application of TPU in Rolling Process——Guangyuan Ruifeng New Materials

Guangan///Guangyuan,Guoyuan///Guangyuan,Ganguan///Guangyuan

Sorry，当前栏目暂无内容!

您可以查看其他栏目或返回 首页

Sorry，The current column has no content!

You can view other columns or return Home