Characteristics and common types of foam

Foam is divided into PU foam, conductive foam, CR, etc. It has a series of characteristics such as convenient use, flexible bending, ultra-thin volume, reliable performance, and a variety of types. I will explain these characteristics and types one by one below.

Foam characteristics: Low pressure and excellent shielding effect, with a shielding efficiency exceeding 90dB. Elastic and lightweight. Anti corrosive nickel coating can prevent electrochemical corrosion, low surface contact resistance, fast pressure sensitive fixation, customer can specify the length, numerous cross-section options, UL grade fire resistance, and can be pasted with Mylar sheets (double sided adhesive for customers). The product has stable quality, heat resistance, is not easy to peel off, and high tensile strength. After installation, the product can maintain this quality after being tested at low temperature -20 ℃ to high temperature 80 ℃ for 72 hours of cyclic testing. It has a series of characteristics such as convenient use, flexible bending, ultra-thin volume, and reliable performance.

Common types of PU foam: PU is polyurethane, and PU skin is the skin of polyurethane components. Now clothing manufacturers widely use this material to produce clothing, commonly known as imitation leather clothing. PU is the abbreviation of English ploy urethane, and the chemical Chinese name of polyurethane also has good or bad quality. Imported PU skin is often used for good bags; PU leather is usually the second layer of leather material with a cowhide on the back, which is coated with a layer of PU resin on the surface, so it is also known as filmed cowhide. Its price is relatively cheap and its utilization rate is high. It is also made into various grades of leather with changes in technology, such as imported two-layer cowhide. Due to its unique craftsmanship, stable quality, and novel varieties, it is currently a high-end leather with a price and grade no less than that of the top layer genuine leather.

Conductive foam: Conductive foam is wrapped in a conductive cloth on a flame-retardant sponge, and after a series of treatments, it has good surface conductivity, which can be easily fixed on the shielding device with adhesive tape. Shielding materials with different profile shapes, installation methods, UL ratings, and shielding effectiveness are available for selection. Conductive foam can be divided into: aluminum foil cloth foam, conductive fiber cloth foam, gold-plated cloth foam, carbon plated cloth foam, and other conductive foam materials. The characteristics and advantages of conductive foam comply with RoHS's improved Z-axis resistivity, which can increase the shielding efficiency to over 90dB in a large frequency range. Applicable thicknesses are 0.039 "(1mm), 0.060" (1.5mm), 0.079 "(2 mm), 0.098" (2.5 mm), 0.125 "(3.2mm), and the width can reach 0.250" (6.4mm). The compression range is large, It can be compressed up to 60% of the original thickness and also has UL94 HB and V0 flame retardant ratings.

CR foam: CR foam is a general-purpose special rubber that not only has the good physical properties of ordinary rubber, but also has excellent properties such as flame resistance, oil resistance, and chemical corrosion resistance, making it important in various synthetic rubbers. Main features: 1. Excellent sealing performance, avoiding gas release and atomization. 2. Excellent compression deformation resistance, that is, durability of elasticity, can ensure long-term shock protection for accessories. 3. It has flame retardancy, does not contain harmful and toxic substances, does not remain, does not pollute equipment, and is not corrosive to metals. 4. It can be used in various temperature ranges. It can be used from minus 40 degrees Celsius to 90 degrees Celsius. 5. The surface has excellent wettability, easy adhesion, easy fabrication, and easy punching. 6. The engineering polyurethane formula provides a wide modulus range -2-90 psi @ 25% deviation - to meet more design flexibility requirements. We can customize according to customer requirements and attach various imported tapes with good adhesion. Our products are widely used in fields such as communication, computers, household appliances, calculators, electronic toys, and various electronic controllers.