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  • Causes and solutions of protective film indentation

    I. formation of indentation:Most of the indentations are caused by the material being squeezed by the blade during the cutting process, and the closer the two knives are, the deeper the cutting depth is. (e.g. figure 1)Ii. Case analysis:Here's an example of the Iphone5S's front cover. The red part in figure 2 is the hard-hit area of indentation. How can we solve this problem?First: start with the knife.As shown in figure 1, indentation is caused by the edge of the knife, but no edge can

  • What are the raw materials of sponge?

    Chemical sponge: polyurethane soft foam rubber, polyurethane is the most common polymer material in life, widely used in the production of various sponge products. And elastic materials for shock and friction protection, such as soles, tractor tank caterpillar substrates.The production process of sponge is as follows:A. Mix foaming resins, foaming AIDS, and adhesive resins (to make the finished product adhesive) together.B. Foaming process. Eighty parts of ethylene acetate (EVA), 20 parts of APA

  • What is EPDM foaming?

    EPDM foaming is a kind of foaming material, which can be used to make foaming products with EPDM foaming, which can be applied to the corresponding industry. So what is EPDM foaming? We can take a quick look at its performance and the application industry.EPDM foaming performance: EPDM (EPDM) with full saturation and high degree of flexibility, is a kind of general synthetic rubber, excellent chemical stability and aging resistance, impact elasticity and low temperature performance.EPDM foam pro

  • Is the sound-absorbing cotton the same as the sound-absorbing cotton?

    Sound-absorbing cotton is different from sound-absorbing cotton:The absorbent cotton is mostly made of fiber, with a porous structure, which is quite fluffy. Its main function is to absorb the noise and reduce the noise.Sound insulation cotton is mostly rubber material, closed hole structure, compared with porcelain solid, the main role is to block noise.Sound-absorbing cotton and sound-proof cotton are indispensable in the construction of noise reduction. It is necessary to use them together wh

  • Is there any poison in sponge products?

    1. The monomer of synthetic PU is toxic chemical substance, while PU is polymerized product, and the mature sponge product is non-toxic!2. Some PU products, due to low degree of polymerization, will have a small amount of monomers left in the products, such products are toxic!3. If there is no stimulating smell, it means that it is basically non-toxic, otherwise it will be toxic!4. Slightly heated and cooked for a period of time, volatilize the residue after non-toxic!Site keyword:Auto Interior

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