What kinds of materials are there in plastic bags?
What kinds of materials are there in plastic bags? There are more than one materials for plastic packaging bags, and the materials can be customized according to customer requirements. In order to let everyone know more about plastic bags, this time I will give you a popular science about the materials of plastic packaging bags.
The first is: PE, polyethylene (Polyethylene, PE), referred to as PE, is a high-molecular organic compound obtained by addition polymerization of ethylene, and is recognized as a good material for food contact in the world. Polyethylene is moisture-proof, anti-oxidant, acid-resistant, alkali-resistant, non-toxic, tasteless, odorless, and conforms to food packaging hygiene standards, and is known as the "flower of plastic". It is the most used and most important material for plastic packaging printing.
PO: High-density polyethylene (HDPE) blow molding, non-toxic, feel like wax, with excellent low temperature resistance. When the thickness reaches a certain level, it is opaque, and the plastic packaging bag produced looks white, but it is actually transparent, but it is only foggy. Good toughness, non-toxic, often used as flat pockets and vest bags, especially vest bags, the vest bags used in our daily life (the kind used in supermarkets) are almost all made of PO materials.
PP: PP is a plastic bag made of polypropylene. The PP plastic bag has high transparency, slight watermarks, smooth and brittle hand feel, and looks crystal clear. It is a medium-to-high-end product packaging bag. Generally used for terminal packaging, commonly used in stationery, self-adhesive, toys, clothing, jewelry (gold, platinum, silver necklaces, jade and other accessories); often used to make bare flat pockets, bare bags along the line, bare cards Head bag, bare body self-adhesive bag, bare body card head self-adhesive bag, etc.
OPP: The material of OPP plastic packaging bag is polypropylene, and the transparency is the best, highest and most translucent material of all plastic packaging bags, which has the effect of preventing dust and improving the value of the packaged products. The products inside can be fully displayed during sales, so OPP plastic bags are usually used as outer packaging for commodity sales, which not only protects but also beautifies. Widely used in jewelry, jade, stationery, toys, tableware, kitchen utensils, clothing and other fields.
PPE: PPE plastic packaging bag is a product produced by the combination of PP and PE. The product is dust-proof, anti-bacteria, moisture-proof, anti-oxidation, high temperature resistance, low temperature resistance, oil resistance, non-toxic and tasteless, high transparency, strong mechanical properties, It has the characteristics of high blast resistance, strong puncture resistance and tear resistance.
CPE: Chlorinated polyethylene is a high-density polyethylene (HDPE) polymer material obtained by chlorinated substitution reaction. According to different structures and uses, chlorinated polyethylene can be divided into two categories: resin type chlorinated polyethylene (CPE) and elastomer type chlorinated polyethylene (CM). The frosted bag we often say is made of CPE material. However, because the production of such films is very polluting, many plastic bag manufacturers generally can only purchase CPE films from outside, not foreign countries, but second- and third-tier cities.
PVC: Polyvinyl chloride with additional ingredients to enhance its heat resistance, toughness, ductility, etc. The top layer of this surface film is lacquer, the main component in the middle is polyvinyl chloride, and the bottom layer is a back coating adhesive. It is a well-loved, popular and widely used synthetic material in the world today. Among the materials that can produce three-dimensional surface films, PVC is the most suitable material.
POF: short for biaxially oriented polyolefin shrink film, it is also the most widely used and rapidly developing new environmentally friendly shrink film in the world. It has the characteristics of high transparency, shrinkage performance, excellent heat sealing performance, good toughness, antistatic, and excellent cold resistance. It is a non-toxic, safe and reliable soft shrink film. Shrink packaging for various regular and irregular products is also the most common in our lives.
In addition, there are many more, and we will leave it to the next time to introduce it. Seeing this, some people may ask why there is no introduction to composite and co-extrusion materials. That is because they are not actually one kind of material, whether it is composite or co-extrusion, they are all made up of different materials, especially composite materials that can also be composited with plastics.
Author：Roro
E-mail: landy@bowenpack.com
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