Industrial packaging knowledge - what is plastic packaging

Industrial packaging knowledge - what is plastic packaging

       Plastic is a synthetic or natural polymer resin as the main material. After adding various additives, it has ductility under certain temperature and pressure, and can fix its shape after cooling. Natural or synthetic polymer resin molecules in the molten state, and around the uniform distribution of additives molecules in the process called plasticization, has reached this process called has been plasticized, has not reached, is considered not yet plasticized. Plastic packaging is one of the four major materials in the packaging industry: paper and cardboard accounted for 30%, plastic accounted for 25%, metal accounted for 25%, glass accounted for 15%.

  Plastic according to its own performance can be divided into: can be repeated many times to melt molding process and basically maintain its characteristics of thermoplastics and thermosetting plastics can only be a melt molding of the two categories. According to its use can be divided into a wide range of use, inexpensive, good overall performance of the general-purpose plastics, such as PE, PP, PVC, PS, and amine-based plastics have good physical and mechanical strength, may be used instead of metal in the engineering machinery engineering plastics, such as: ABS, nylon, polyester, POM, TPX-1 and so on. As well as a class of engineering plastics with particularly good performance, such as: special plastics with particularly good radiation resistance, high temperature resistance, such as: polyarylsulfone, liquid crystal polymers, and so on. According to the thermoplastic resin molecular crystallization size to points, thermoplastics can be divided into amorphous polymers and crystalline polymers two categories.

Plastic bags can be divided into OPP, CPP, PP, PE, PVA, EVA, composite bags, co-extruded bags and so on.

OPP plastic bags:

Characteristics: hard, unchanged after pulling. Can not be stretched (two-way stretch) single piece of folding, edge seal welding, the longest length can not exceed 640m/m. Single piece of 1.28M long, 0.6M wide.

Advantages: good transparency.

Disadvantages: easy to tear the two sides of the seal.

 PP plastic bag: polypropylene Polypropylene

Characteristics: hardness second to OPP, can be stretched (two-way stretch) after pulling into a triangle, bottom seal or side seal (envelope bags), tube material. Transparency is worse than OPP.

 PE plastic bags: polyethylene Polyethylene

Characteristics: formalin, transparency is slightly worse.

HDPE: High density low pressure polyethyleneHigh density polyethylene feel brittle, mostly used to do horse sandwich bags.

LDPE: Low density polyethylene Low density polyethylene feel soft.

PVA plastic bags:

Vinylon characteristics: environmentally friendly materials, in the water will dissolve. Domestic production of this raw material can not be imported from Japan, expensive, more widely used in foreign countries. Advantages, soft and transparent, harmless.

CPP plastic bags:

Characteristics: non-toxic, no God formalin, can be compounded, transparency is better than PE, hardness is slightly worse. After pulling will grow out, soft texture, PP transparency, PE soft.

Composite bag:

Characteristics: Firm edge seal strength, can be printed, ink will not come off.

Co-extruded bag:

Characteristics: good transparency, soft texture, can be printed.

 Plastic Blister

A kind of plastic processing technology, the main principle is to spread the plastic hard sheet after heating to soften, using vacuum adsorption on the surface of the mold, after cooling molding, widely used in plastic packaging, lighting, advertising, decoration and other industries.

Blister Packaging

Adopting the blister molding process to produce plastic products, and use the corresponding equipment to encapsulate the product is a general term.

  The main advantages of blister packaging are: saving raw and auxiliary materials, light weight, easy transportation, good sealing performance, in line with the requirements of environmental protection and green packaging; can pack any shaped products, no need to add cushioning materials; packaged products are transparent and visible, beautiful in appearance, easy to sell, and suitable for mechanized, automated packaging, to facilitate the modernization of the management, save manpower, improve efficiency!

Blister packaging equipment mainly includes: Blister molding machine, punching machine, sealing machine, high frequency machine,folding machine.Product classification

Packaging products can be divided into: insert card, suction card, double blister, half blister, folded blister, triple folded blister and so on.

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