At present, the material characteristics of the main me […]
At present, the material characteristics of the main medicinal plastic bottles. At present, the main raw materials selected by medical plastic bottle manufacturers are PP, PE and PET, and the new materials are COC and COP (cycloolefin polymer). COP medical plastic bottles are mostly used for the packaging of high-end medicines, biological products, and freeze-dried powder injections. It has the ideal properties of high transparency, non-fragile, sterilization adaptability (EO, γ-ray, steam sterilization), excellent chemical stability, acid and alkali resistance, low protein adsorption, low metal ion residues, energy Resistant to liquids with a pH value greater than 9, avoiding the phenomenon of delamination and adsorption of glass materials.
PP medical plastic bottles are mostly used for the packaging of health care product bottles and oral liquid preparations. PP polypropylene is a non-toxic, odorless, tasteless milky white high-crystalline polymer with a density of only 0.90--"0.91g/cm3, which is one of the lightest varieties of all plastics at present. It is particularly stable to water. , The water absorption rate in water is only 0.01%, and the molecular weight is about 80,000 to 150,000. The formability is good, but the shrinkage rate is large (1% to 2.5%). Thick-walled products are easy to dent, and some dimensional accuracy is relatively low High parts, it is difficult to meet the requirements, the surface of the product is good, and it can be used for high temperature and high pressure mold
Effervescent tablet tube
As the most widely used medical plastic bottle, PE medical plastic bottle is commonly used for oral solid preparations, oral liquid preparations, and packaging of Chinese medicine pieces. Polyethylene is odorless, non-toxic, feels like wax, has excellent low temperature resistance (minimum operating temperature can reach -100~-70°C), good chemical stability, and can resist most acid and alkali erosion (not resistant to oxidation nature acid). It is insoluble in common solvents at room temperature, with low water absorption and excellent electrical insulation.
PET medical plastic bottles are used for health care products and oral liquid preparations. PET is a milky white or pre-yellow highly crystalline polymer with a smooth and glossy surface. It has good creep resistance, fatigue resistance, abrasion resistance and dimensional stability, low wear and high hardness, and has the greatest toughness among thermoplastics: good electrical insulation performance, small temperature influence, but poor corona resistance. Non-toxic, weather resistant, chemical resistant, low water absorption, resistant to weak acids and organic solvents, but not resistant to hot water immersion and alkali.