Pharmaceutical plastic bottles are generally made of PE, PP, PET and other materials, with the advantages of not easy to break, good sealing performance, moisture-proof, hygiene, in line with the special requirements of drug packaging, etc., without the need for cleaning, drying can be directly used for drug packaging, is an excellent pharmaceutical packaging containers, widely used in oral solid medicines.
High-density polyethylene (HDPE) has excellent resistance to most household and industrial chemicals. With a light weight, non-toxic, colorless, odorless, non-messy, melting point of about 130 ℃, good chemical stability, not affected by strong acids, strong alkalis and most of the melting agent, abrasion resistance, cold resistance and moisture barrier properties are also better, and have enough strength, stiffness and impact resistance, processing is also very easy, suitable for blow molding hollow products, you can add a certain amount of low-density polyethylene and linear polyethylene in order to regulate the processing and use of performance.
Polyethylene terephthalate (PET) is a high polymer, by the dehydration of glycol terephthalate condensation reaction. PET is a milky white or light yellow, highly crystalline polymer with a smooth, glossy surface. PET has excellent physical and mechanical properties in a wide range of temperatures, long-term use of up to 120 ℃, excellent electrical insulation, even at high temperatures and high frequencies, its electrical properties are still good, but poor corona resistance, creep resistance, fatigue resistance, friction resistance, dimensional stability are very good.PET is colorless, transparent, non-toxic, odorless, tasteless, chemically stable, good barrier to oxygen, water vapor, odor, and tensile strength. Barrier to oxygen, water vapor barrier is also good, and tensile strength, low temperature performance is good, is used for medicinal plastic bottles of excellent materials.
Polypropylene (PP) is a thermoplastic resin produced by the polymerization of propylene. Non-toxic, non-messy, odorless, colorless, melting point of 164 ~ 170 ℃, is one of the lightest varieties of plastics, extremely difficult to dissolve in water, due to the high degree of crystallinity, the surface stiffness of this material and scratch resistance characteristics are very good. Has excellent mechanical properties, yield strength, tensile strength, high hardness, elasticity and resistance to stress rupture performance is superior, good chemical stability, resistance to strong acids, strong alkalis and most organic substances, airtightness, water vapor barrier is excellent, melting point of up to 170 ℃, especially suitable for high-temperature disinfection sterilization is an excellent manufacture of plastic bottles of medicinal plastic materials, but also can be added to the use of polyethylene co-mingled to meet the requirements.
The above three types of plastic materials made of pharmaceutical plastic bottles can basically meet the requirements of the majority of oral liquid and solid drug packaging, the majority of the current market sales of pharmaceutical plastic bottles are made of the above three types of plastic, has been recognized by the market.