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　　Pearl cotton generally does not expand and contract with heat and cold. The amount is very small. The situation you mentioned may be that pearl cotton is damp. Pearl cotton is a porous structure. This weather is very simple to absorb water, and it will be fine and tight after absorbing water. Try monotony. Polyethylene foamed cotton with right wrong cross-linked closed cell structure, also known as EPE pearl cotton, is a new packaging material. It is composed of many independent bubbles generated by physical foaming of low-density polyethylene grease. It overcomes the shortcomings of fragile, deformation and poor recovery of general styrofoam. It has many advantages, such as water-proof and moisture-proof, shockproof, sound insulation, thermal insulation, good plasticity, strong tolerance, recycling, strong collision resistance, and also has good chemical resistance. It is an ideal substitute for traditional packaging materials. Pearl cotton is widely used in electronic and electrical appliances, instruments and meters, computers, audio, industrial control chassis, lighting, handicrafts, glass, ceramics, household appliances, spraying, furniture, wine and gift packaging, inner packaging of hardware products, toys, melons and fruits, leather shoes, daily necessities and other products. EPE pearl cotton is also used in many elastic fabrics for handbags and bags, sound insulation, heat insulation materials for industrial production, floating equipment for aquaculture, protective pads for sporting goods, life-saving devices for water operation, floor decoration and pads for homes and hotels, etc. Many of its pipes are used in air conditioning, baby carriages, children's toys, furniture and other occupations.

　　According to the characteristics of irregular products, it can be combined and packaged with buffer materials with different functions to meet the characteristic requirements of different parts of the product. A precision electronic tube is packaged. This product is composed of a fragile glass tube and a metal mandrel anode. The easily damaged part is the shaft sleeve of the baked part. Moreover, the internal anode mass expands. When the motion accelerates, it will cause contact damage. For the packaging of this product, the metal parts that are broken out of the glass must be fixed in the wooden block first, then the whole product is fixed in the rigid polystyrene plastic molding body, and then packed in a paper basin.

　　Pearl cotton can not only meet the needs of industrial production, but also slowly extend to the daily category. With its outstanding cushioning function, pearl cotton is not easy to be damaged and environmental protection. It has been made into daily necessities such as yoga mat, floating equipment for aquaculture, protective mat for sporting goods, life-saving devices for water operation, and the application of pearl cotton is further expanded.

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