Cosmetic bags can be divided into PVC cosmetic bags and EVA cosmetic bags. Shenzhen Huale Plastic Product Co., Ltd custom production of various PVC bags, EVA bags, mainly including PVC handbags, PVC zipper bags, PVC cosmetic bags, EVA bags, EVA clothing bags, mobile phone waterproof bags.
PVC can be divided into soft PVC and hard PVC. Hard PVC accounts for about 2/3 of the market, and soft PVC accounts for 1/3. Soft PVC is generally used for the surface of floors, ceilings and leather, but because soft PVC contains softener (this is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to store, so its scope of use has been limited. Hard PVC does not contain softener, so it has good flexibility, easy to form, is not brittle, non-toxic and non-polluting, and has a long storage time, so it has great development and application value.
The softening point of the polyvinyl chloride resin is close to the decomposition temperature. It begins to decompose at 140 ° C and decomposes more rapidly at 170 ° C. In order to ensure the normal processing of the molding process, two most important process indexes, namely decomposition temperature and thermal stability, are specified for the polyvinyl chloride resin. The so-called decomposition temperature is the temperature at which a large amount of hydrogen chloride is released. The so-called thermal stability is a time when hydrogen chloride is not released in a large amount under a certain temperature condition (usually 190 ° C). Polyvinyl chloride plastics are exposed to 100 ° C for a long time. Unless an alkaline stabilizer is added, they will decompose. If they exceed 180 ° C, they will decompose rapidly.
PVC is mainly used to make various PVC bags, which are used to package goods and improve the grade of goods. PVC bag factory custom PVC bag, not only beautifully packaged, but also has a propaganda role, can be described as a multi-purpose.
Related information: PVC bag factory, EVA bag factory, mobile phone waterproof bag factory.