Composition: The sponge is mostly composed of polyurethane. The same material is the same as foam. Different manufacturing processes will create different things. The types of sponges are divided into polyester sponges and polyether sponges. The polyester sponge is a high-pressure sealing foam. Polyether sponge is box shaped foam.

Characteristics of polyester sponge: strong tensile strength, uniform pores, high density. Sponges produced by Japan's Inoue Shanghai Cotton Co., Ltd. and Bridgestone Sponge Co., Ltd. have stable performance and are commonly used in electronics, automobiles, printer consumables, and precision instrument packaging, Electrical aspects.

The common characteristics of compressed sponge polyether sponge polyether sponge are low density, insufficient strength, and inferior appearance of pores compared to polyester. Generally produced in China, it is commonly used in packaging, home furnishings, electronics, appliances, toys, luggage, shoe materials, etc Clothing and other neighborhood sponge hardness sponges can be divided into three types: thin, medium, and thick, with a distinction between soft and hard: 1. Thin (below 1.0mm-1.2mm), which is conducive to defensive play; 2. Medium size (1.2mm-1.7mm or less), a combination of attack and defense gameplay; 3. Thickness (less than 1.7mm-2.0mm), offensive style of play. Sponge hardness: 20-35 ° Soft sponge 26-40 ° Neutral sponge 41-45 ° 46-55 ° Full attack type (hard sponge) 56 ° ≈ Ultra hard type

Production process

A. Mix foaming resin, foaming agent, and adhesive resin to make the finished product sticky

B. Perform foaming processing. Mix 80 parts of ethylene vinyl acetate (EVA), 20 parts of APAOPT3385, 20 parts of azodicarbonamide, 19 parts of CaCO, and 0.6 parts of peroxydicarboxylic acid together, place them in a mold for foaming, and use them mechanically to obtain a foam sponge that breaks through closed cells. Its density (d) is 0.028g/cm, and its compressive hardness at 25% is 1.9KPa.

Application areas: PU sponge has the characteristics of insulation, heat insulation, sound absorption, shock absorption, flame retardancy, anti-static, and good breathability, so it is involved in various industries, including the automotive industry, battery industry, cosmetics industry, bra manufacturing industry, and furniture. Manufacturing, etc

Sponge materials (including ultra soft, medium soft, ultra hard, and high rebound sponges) must have a smooth and flat surface, uniform mesh size, no stains, and the same softness as the template. Require the knife to cut straight and evenly, without any waves.

Sponge material: The internal structure of sponge sponge cannot be mixed with other recycled cotton. Each batch of sponge material supplier must provide a product quality certificate, including material composition and name, which must comply with environmental standards, maintain the necessary elasticity, and its density must also meet the corresponding standards.

Size and quantity: The thickness, width, and length of the sponge must meet the requirements of the company's purchase contract. The allowable tolerance for length and width is ± 10mm, and the allowable tolerance for thickness is ± 1mm. The quantity, specifications, and model must meet the ordering requirements.