What are the plastic packaging materials?

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Plastic packaging bag materials (polyvinylidene chloride) polyvinylidene chloride (PVDC) resin is often used as composite materials or monomer materials and co extruded film sheets, which is the most widely used high insulation packaging materials In the meantime, PVDC coated film is used more than ever PVDC coating film is based on polypropylene (OPP) and polyethylene terephthalate (PET) Because pure PVDC has high softening temperature, close to its differentiation temperature and poor compatibility with common plasticizers, it is difficult to heat and form and difficult to be used directly PVDC films used in practice are mostly copolymers of vinylidene chloride (VDC) and vinyl chloride (VC), as well as films with good insulating properties made by copolymerization with methyl acrylate (MA) 2、 Plastic packaging bag packaging materials nylon packaging materials used to use “nylon 6” directly However, the air tightness of “nylon 6” is not ideal There is a nylon (MXD6) polycondensated from m-dimethylamine and adipic acid. Its air tightness is 10 times higher than that of “nylon 6”. Together, it has excellent transparency and puncture resistance It is mainly used for high insulation packaging film, which is used for food flexible packaging with high insulation requirements Its food hygiene has also been approved by FDA As a film, its greatest feature is that its isolation does not decrease with the rise of humidity In Europe, MXD6 nylon is widely used as a substitute for PVDC films because of its outstanding environmental protection

polyethylene. In packaging, polyethylene is mainly used to make plastic film, as well as bottles, barrels, packaging boxes and boxes. Among them, high-pressure polyethylene film is widely used, which is very suitable for the packaging and preservation of vegetables and fruits. It is also used for individual packaging and internal packaging of industrial products. The semi rigid foam plastic after foaming is used for packaging and shockproof. p>

polypropylene. Polypropylene is non-toxic and pollution-free. It can be made into film, bottle and cover and woven into packaging bags with film flat wires. It is used for food and drug packaging and made into various external packaging bags. Large bags such as container bags also use polypropylene materials as base materials

polystyrene. It is mainly used as packaging containers such as boxes, cans and plates and heat shrinkable film packaging materials. Foamed polystyrene foam is used for packing cushions and built-in shockproof materials. p>

polyvinyl chloride. It can be made into bottles, boxes, boxes, and super membranes. It can be used for small package bags or made of revolving plastic boxes, and can also be foamed into rigid foam plastics. p>

calcium plastic material. It can be made of wood instead of plastic, cardboard and other packaging materials, and can be used as calcium packaging materials

Plastic packaging bag is a kind of packaging bag with plastic as raw material and used for producing all kinds of articles in life. It is widely used in daily life and industrial production, but this temporary convenience brings long-term harm. Most commonly used plastic packaging bags are made of polyethylene film, which is non-toxic, so it can be used to contain food. Another kind of film is made of PVC, which is also non-toxic, but the additives added according to the purpose of the film are often harmful to human body and have certain toxicity. Therefore, this kind of film and plastic bags made of this film should not be used to contain food. Plastic packaging bags can be divided into OPP, CPP, PP, PE, PVA, EVA, composite bags, coextrusion bags, etc. Plastic packaging bags can be divided into plastic woven bags and plastic film bags according to different product structures and uses. Plastic woven bags are composed of polypropylene bags and polyethylene bags according to the main materials; According to the sewing method, it is divided into sewing bottom bag and sewing edge bottom bag. It is widely used as a packaging material for fertilizers, chemical products and other goods. Its main production process is to use plastic raw materials to extrude film, cut and stretch into flat wires in one direction, and then weave the products through warp and weft. It is generally called woven bag. Its characteristics are light weight, high strength and corrosion resistance. After adding plastic film lining, it can be moisture-proof and moisture-proof; The load capacity of light bags is less than 2.5kg, that of medium bags is 25-50kg, and that of heavy bags is 50-100kg. Film bag. The raw material of plastic film bag is polyethylene. Plastic bags do bring convenience to our life, but this temporary convenience brings long-term harm. Classification by production raw materials: high pressure polyethylene plastic bags, low pressure polyethylene plastic bags, polypropylene plastic bags, PVC plastic bags, etc. Classified by appearance: vest bag, straight bag. Sealing bag, plastic strip bag, special-shaped bag, etc. Features: light bag with a load of more than 1kg; The load capacity of medium-sized bag is 1-10kg; Heavy bag load 10-30kg; The load of container bag is more than 1000kg

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