av在线播放亚洲_а√天堂资源中文最新版地址_2019中文字幕超清在线观看_欧美黄片在线视频

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  • What are the anti-UV additives?

    UV Stabilizers (UV Stabilizers) are a class of chemicals used in plastics, coatings, fibers and other substances to reduce or prevent the aging of materials caused by UV exposure. They are able to abs

    2023/11/27 hooren

  • What are the top 10 plastics with the best UV and weather resistance

    What plastic is good for UV resistance? Here are ten types of plastics that are better at UV and weather resistance:Polycarbonate (PC) : with excellent weather resistance and UV resistance, it is wide

    2023/11/23 hooren

  • PA6 and PA66 are the difference between nylon single 6 and double 6

    PA6 and PA66 are two common types of polyamide (nylon) resins. The main differences between them can be boiled down to the following:Source of raw materials: PA6 is made from caprolactam (6-nylon) mon

    2023/11/10 hooren

  • Advantages and disadvantages of POM materials

    POM (polyformaldehyde) is an engineering plastic, also known as polyethylene glycol formaldehyde ester. It has some advantages and disadvantages, as described below:Advantages:Good physical properties

    2023/11/08 hooren

  • The difference between PPSU and PP materials

    PPSU (polyether sulfone polymer) and PP (polypropylene) are two different types of plastic materials that have different chemical structures and physical properties. Here are some of the main differen

    2023/11/08 hooren

  • HDPE,LDPE,LLDPE difference

    HDPE (high density polyethylene), LDPE (Low density polyethylene) and LLDPE (linear low density polyethylene) are three different types of polyethylene plastics. The differences between them are mainl

    2023/11/06 hooren

  • Mold roughness grade

    The following are some common mold grain (skin grain) data tables to describe the texture characteristics of the mold surface:SPI skin standard (American Plastics Industry Association standard) :Skin

    2023/08/16 hooren

  • Injection mold surface polishing grade

    Die surface polishing grade is assessed according to international standards and requirements. In general, common mold surface polishing grades include the following:SPI standard: SPI standard is the

    2023/07/13 hooren

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