for the production of plastic barrels is polyethylene (PE), referred to as PE, which is a polymer organic compound formed by the addition polymerization of ethylene. Polyethylene is recognized in the world as the best material for food contact. It is non-toxic, tasteless and odorless, and complies with food packaging hygiene standards. Polyethylene film is light and transparent, has moisture-proof, anti-oxidation, acid and alkali resistance, average air tightness, and excellent heat sealability. It is known as the "Flower of Plastics" and is the most commonly used and most important plastic packaging and printing material. Material.
PVC
Polyvinyl chloride , referred to as PVC, has a molecular formula of (CH2-CH2CL)n. It is the most important type of vinyl polymer and the second largest plastic variety in the world after polyethylene. Its domestic output is the largest among plastics. then occupies the first place. In the printing industry, polyvinyl chloride color calendered film and transparent glazing film are often used to make the packaging and decoration of covers of books, folders, tickets, etc.
shrink film
Shrinkfilm is a thermoplastic film that is stretched and oriented during the production process and shrinks when it is treated with hot air or irradiated with infrared rays during use . After heat treatment, the film is tightly wrapped on the packaged object, the shrinkage force reaches its maximum value during the cooling stage, and can be stored for a long time.
Low-density polyethylene
Low-density polyethylene , or LDPE for short, is the most widely used variety in the plastic packaging and printing industry in various countries. The specific gravity is 0.92~0.93 and can float in water. It has low crystallinity (60%) and bulk polymerization occurs at a pressure of 1000 to 3000kg/C㎡, so it is also called high-pressure polyethylene . At 23 °C , the density is around 0.92. It has poor calendering formability and is suitable for processing into tubular films by blow molding. Suitable for food packaging, fiber product packaging, and daily chemical product packaging. Biodegradable plastic bag logo
High-density polyethylene
High density polyethylene , HDPE for short. The density is 0.941~0.965g/cubic centimeter. It is formed by low-pressure polymerization, so it is also called low-pressure polyethylene . It is milky white, indicating poor gloss. The film can be processed by blow molding and T-die extrusion. It is heat-resistant, retort-resistant, cold-resistant and freeze-resistant, has good moisture-proof, gas-proof, and insulating properties, is not easily damaged, and is twice as strong as LDPE. Very easy to speak. It has strong paper-like properties and is known as "paper-like plastic film".
polypropylene film
Biaxially oriented polypropylene film, also known as biaxially oriented polypropylene film , English abbreviation code BOPP, is characterized by stretch molecular orientation, mechanical strength, folding strength, air density, and moisture-proof barrier properties that are superior to ordinary plastic films. Compared with cellophane based on unit area, the unit price is lower than cellophane. Because this kind of film has excellent transparency, the color reproduction after inner printing is particularly bright and beautiful, and it is an important base material for plastic composite flexible packaging .
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