The so-called plastics are organic compounds with very high molecular weights, or various materials with their basic components, which are molded into the final solid state by heat and pressure to make them fluid, and are called plastics. Plastic is widely used in daily life and has gradually replaced some metal, paper and wooden products.

Plastic is a synthetic resin as the main component, with or without the addition of other additives and made of an artificial material, the main component of plastic is synthetic or natural polymer compounds, that is, polymers. The main component of plastics is synthetic or natural polymer compounds, i.e., polymers. Synthetic resins are polymers, and additives include fillers, colorants, plasticizers, stabilizers, lubricants, etc. The synthetic resin determines the shape (thermoplastic or thermosetting) and the main properties of the plastic, such as mechanical properties, physical properties, chemical properties, electrical properties and so on. The proportion of synthetic resin in plastics is generally not less than 40%.

Rubber is extracted from the latex of rubber trees, rubber grass and other plants, processed and made of elasticity, insulation, impermeable to water and air. Elasticity at room temperature, in a very small external force can produce a large deformation, remove the external force can be restored to its original state. Rubber is a completely amorphous polymer with a low glass transition temperature (Tg) and a molecular weight that is often very large, greater than several hundred thousand. Early rubber was taken from the latex of rubber trees, rubber grass and other plants, and processed to make a material that is elastic, insulating, and impervious to water and air. It is a highly elastic polymer compound. Rubber is divided into natural rubber and synthetic rubber two kinds. Natural rubber is extracted from rubber trees, rubber grass and other plants after processing made of gum; synthetic rubber by a variety of monomers by the polymerization reaction and get. Rubber products are widely used in industry or all aspects of life.

Rubber and plastic essential difference:

From the touch feel, rubber feel more soft comfortable and delicate, and has a certain degree of elasticity, plastic is completely inelastic, with a certain degree of steel, more hard, more brittle.

From the tensile stress-strain curve, plastics in the early stretching show a high Young's modulus, stress-strain curve has a steeply rising stage, and then yield, extension and fracture (brittle plastics do not yield deformation, direct fracture); rubber is usually in the stage of small deformation there is a significant stress rise, and then enter a gently rising stage until the imminent rupture of the stress-strain curve only shows a steeply rising area (usually leading to the fracture) The stress-strain curve does not show a steep rise until the impending fracture (usually due to strain-induced crystallization, which is the cause of the final stress rise). The elongation at break of rubber is usually much greater than that of plastic materials.

From a thermodynamic point of view, plastics are below the material's glass transition temperature (glassy state) in the service temperature range, whereas rubber operates in a highly elastic state above its glass transition temperature.

The most essential difference between plastic and rubber is that plastic deforms plastically when deformed, while rubber deforms elastically. In other words, plastics do not easily return to their original state after deformation, whereas rubber does so relatively easily. The elasticity of plastic is very small, usually less than 100%, while rubber can reach 1000% or more. Plastic in the molding of the majority of the molding process is completed product process is also completed; and rubber molding process is completed after the vulcanization process is still needed.

Different uses. Rubber not only for people to provide daily life indispensable daily use, medical and other light industrial rubber products, and to the extractive, transportation, construction, machinery, electronics and other heavy industry and emerging industries to provide a variety of rubber production equipment or rubber parts. Plastic is widely used in every field of life nowadays, such as household appliances, instruments, wires and cables, construction equipment, communication electronics, automobile industry, aerospace and aviation, daily-use hardware and so on.

The composition is different. Rubber is manufactured by the latex, latex contained in the non-rubber components of a part of the natural rubber to stay in the solid. General natural rubber contains 92% -95% rubber hydrocarbon, and non-rubber hydrocarbon accounted for 5% -8%. Due to different production methods, different places of origin and even different seasons of rubber harvesting, the proportion of these components may vary, but basically within the range. Plastic takes high molecular weight synthetic resin as the main component, and adds appropriate additives, such as plasticizers, stabilizers, flame retardants, lubricants, coloring agents and so on.

What is the difference between plastic and plastic
In the eyes of people in the industry, plastic and plastic are one thing. In the past, domestic factories were called plastic factories, while Hong Kong and Taiwan called plastic factories plastic companies. At present, some domestic three-funded enterprises in order to communicate with foreign investors to facilitate, basically also hang **Plastics ** Limited brand. Can not be literally understood as plastic and rubber. Hong Kong and Taiwan speech with the mainland there are differences, such as the panda, Taiwan is called “cat and bear”.