Why are most plastic bottles used in polythene bottles?
Medical plastic bottles are generally made of PET material. They have the advantages of easy breakage, good sealing performance, moisture resistance, sanitation, and special requirements for pharmaceutical packaging. They can be used directly in pharmaceutical packaging without washing or drying
Is a kind of excellent medicinal packaging containers, widely used for oral solid drug (such as tablets, capsules, granules) and oral liquid medicine (such as tincture syrup, etc.) packaging, compared with other plastic hollow containers of medical plastic bottle has many special places.
Polyethylene in the atmosphere, sunlight and oxygen under the influence of aging, discoloration, cracking, brittle or powder, the loss of its mechanical properties. In molding temperature, also because of oxidation, the melt kill degree, change color, lines, so attention should be paid to in the processing and use of the process or material. Because polyethylene has the above characteristics, it is easy to process and shape, so the recycling of polyethylene has very far-reaching value.
Ethylene and good chemical stability, high temperature dilute nitric acid, sulfuric acid and any concentration of hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, ammonia, amines, hydrogen peroxide, sodium hydroxide, potassium hydroxide solution. But not strong oxidizing corrosion, such as fuming sulfuric acid, concentrated nitric acid, and chromic acid mixed with sulfuric acid. At room temperature, the solvent will cause a slow erosion of polyethylene, and at 90-100 degrees, concentrated sulfuric acid and concentrated nitric acid will quickly erode polyethylene, so that it destroys or decomposes.
Polyethylene, referred to as PE, is a thermoplastic resin made by polymerization of ethylene. Industrially, it also includes copolymers of ethylene with a small amount of alpha olefins. Polyethylene is odorless, non-toxic, feel like wax, has excellent resistance to low temperature performance (minimum temperature up to -100~-70 degrees C), good chemical stability, erosion resistance to most acid-base (not resistant to oxidizing acid). At room temperature, insoluble in general solvents, low water absorption, good electrical insulation.
