Plastic products is the use of plastic as the main raw materials for the processing of life supplies, industrial supplies collectively, it uses the plasticity of synthetic polymer materials made. Plastics and synthetic rubber, synthetic fibers form a daily life indispensable three major synthetic materials. Its finished products to natural or synthetic resin as the main ingredient, including a variety of additives, and with a certain temperature and pressure can be molded into a certain shape, at room temperature to maintain the shape of the same characteristics.
Plastic products is the use of plastic as the main raw materials for the processing of life supplies, industrial supplies collectively, it uses the plasticity of synthetic polymer materials made.
Plastics and synthetic rubber, combined Fibroblasts form the three major synthetic materials that are indispensable in daily life. Its finished products to natural or synthetic resin as the main ingredient, including a variety of additives, and with a certain temperature and pressure can be molded into a certain shape, at room temperature to maintain the shape of the same characteristics.  Many plastic products can be directly used in daily life, but most of the plastic products are used as materials in various industries. The application of plastic products in the packaging field has developed rapidly, and the consumption of plastic products in China in 1983 accounted for the 3rd place of total consumption of packaging materials. China's agricultural plastic film production, 1985 has reached 25.2kt, accounted for 10% of the total production of plastic products, ranked in the forefront of the world.
There is no uniform scientific classification criterion for plastic products.
According to the plastic varieties classified as polyolefin products, polyvinyl chloride products, according to the processing methods are divided into injection molding products, extruded products, calendering products and coating products. However, the habit of more according to its application areas, divided into packaging supplies, construction supplies, agricultural supplies, industrial supplies, medical stationery and daily necessities.
Raw materials/Plastic products
The raw materials of plastic products, in addition to a variety of synthetic resins and plastic additives, but also according to the structure and use of products, the use of textiles, paper and metal materials.
For example, artificial leather to textile or non-woven fabric base, plastic wallpaper to paper as the base, electrical plastic products that are embedded with copper inserts. Plastic raw materials are also selected according to the requirements of product use, such as the production of small permeability of the packaging film, the use of polyester, styrene acrylonitrile copolymer, such as small permeability of plastic, or multi-layer structure, there are special performance requirements (such as high-temperature, oil, corrosion, etc.) of plastic products, the use of fluorine plastic, silicone plastic and so on. Since the 70, the extensive use of blended polymers and reinforced thermoplastics has begun.
Performance features/Plastic products
Plastic is a lighter material, and the relative density is distributed between 0.90-2.2. Foam plastics in particular, because of the micro-pores, texture lighter, the relative density of only 0.01.
This feature allows plastics to be used in the production of products that require weight loss.
Excellent chemical stability Most plastics have good corrosion resistance to acid, alkali and other chemical substances. Especially commonly known as plastic King Teflon (F4), its chemical stability even better than gold, put in "aqua regia" boil more than 10 hours also will not degenerate. Due to its excellent chemical stability, F4 is an ideal corrosion resistant material.
such as F4 can be used as material for conveying corrosive and viscous liquid pipelines. Excellent electrical insulation of ordinary plastics are electrical bad conductor, its surface resistance, volume resistance is very large, with a number of up to 10,911,018 ohms. The breakdown voltage is large, the dielectric loss angle tangent is very small. Therefore, plastics in the electronics industry and machinery industry has a wide range of applications.
such as plastic insulated control cable.
With the function of noise attenuation and shock absorption Generally speaking, the thermal conductivity of plastics is relatively low, the equivalent of steel 1/75-1/225, foam plastic microporous contains gas, its heat insulation, sound insulation, shockproof better. such as PVC (PVC) Thermal conductivity is only 1/357 of steel, aluminum 1/1250. In the heat insulation ability, the single glass window is 40% higher than the single glass aluminum window, and the double glass height is 50%.
The combination of plastic form and insulating glass, in the residential, office buildings, wards, guesthouses, the use of winter to save heat, summer savings in air-conditioning expenses, the benefits are obvious.
Mechanical strength distribution is wide and higher than strength Some plastic hard such as stone, steel, and some soft as paper, leather, from plastic hardness, tensile strength, elongation and impact strength, such as mechanical properties, a wide range of distribution, there is a great use of choice. Because the proportion of plastic is small, the strength is big, therefore has the high intensity.
Development Trend/Plastic Products
The development direction of plastics can be summed up in two aspects.
One is to improve the performance, that is, by various means of the existing varieties to be modified, so that their comprehensive ability to be improved; the second is the development of the function, that is, the development of optical, electrical, magnetic and other physical functions of polymer materials, so that plastic can have photoelectric effect, thermoelectric effect, piezoelectric World Plastics Industry, Germany and Sweden ranked first, Japan and some European countries, the United States slower.
Foreign Plastic Packaging presents the following development trends: (1) copolymer Composite Packaging film: Some countries in Europe and the United States to invest heavily in the development of non-polar, polar ethylene copolymer, which will greatly improve the tensile and Coextrusion plastic film properties, and improve transparency, sealing strength, stress, crack resistance, as well as enhance stability, improve molecular weight cloth and extrusion rheological properties. (2) multi-functional composite Film: A large number of foreign development of multi-functional Composite film to make its role further refinement. For example: Hardy film can withstand-18 ℃, -20℃, -35℃ low-temperature Environment, the PP for moistureproof treatment of moisture-proof film, its series of products can be divided into moisture-proof, dew-proof, anti-steam cold, adjustable moisture and other types; anticorrosive film can be packed with perishable, high acidity, sweet degree of food; friction film stacking stability Special PE film Chemical resistance, anti-corrosive, moth-proof film add no odor-free insecticide, the two-way tensile nylon 66 heat-resistant film to replace two-way stretch nylon 6 packaged food, its high temperature up to 140 ℃; new special food packaging film can improve the aroma of food packaging; non-crystalline nylon film transparency similar to Glass Kaoping cover film can protect color, aroma, taste, nutrition Index and the stability of taste quality; The metal protective film is made of LDPE modified film packaging liquid products, in low temperature environment can be hot sealing, pp synthetic paper to improve the packaging of light resistance, cold resistance, heat resistance, water resistant, moisture resistance, oil resistance, acid resistance, Alkali resistance and impact resistance.
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