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Why Use Mostly Plastic Bottles With Polyethylene Bottles
- May 16, 2017 -

Medicinal plastic bottles generally use pet material, with, easy to damage, good sealing performance, moisture, health, in line with the special requirements of drug packaging, etc., without cleaning, drying can be directly used for drug packaging, is a good Medicinal packaging containers, widely used in oral solid drugs (such as tablets, capsules, granules, etc.) and oral liquid drugs (such as syrup, tincture agent, etc.) packaging, compared with other plastic hollow packaging containers Plastic bottles have many special places.

Polyethylene referred to as PE is a polymer made of ethylene by polymerization of a thermoplastic resin. Also included in the industry are copolymers of ethylene with minor amounts of alpha-olefins. Polyethylene odorless, non-toxic, feel like wax, with excellent low temperature performance (minimum temperature of up to -100 ~ -70 ° C), chemical stability, and resistance to the majority of acid and alkali erosion (intolerance with oxidation Nature of the acid). At room temperature is not soluble in the general solvent, water absorption is small, excellent electrical insulation.

Ethylene chemical stability is better, at room temperature can be resistant to dilute nitric acid, dilute sulfuric acid and any concentration of hydrochloric acid, hydrofluoric acid, phosphoric acid, formic acid, acetic acid, ammonia, amines, hydrogen peroxide, sodium hydroxide, potassium hydroxide and other solutions The But not resistant to strong oxidation of corrosion, such as fuming sulfuric acid concentrated nitric acid, chromic acid and sulfuric acid mixture. At room temperature, the above solvents will produce a slow erosion of polyethylene, and at 90-100 ° C, concentrated sulfuric acid and concentrated nitric acid will quickly erode the polyethylene, to break or break down.

Polyethylene in the atmosphere, sunlight and oxygen under the effect of aging, discoloration, cracking, brittle or powder, loss of mechanical properties. In the molding processing temperature, but also due to oxidation, so that the degree of melt drop, discoloration, there stripes, and therefore in the molding process and the use of materials or selection should be noted. Because polyethylene has the above characteristics, easy processing molding, so the regeneration of polyethylene recycling has a very far-reaching value.


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