With the development of production equipment and raw materials, plastic packaging has been widely applied to various fields.In recent years, the compared with glass, light quality, non-friable, easy to manufacture and disinfection, to facilitate the sealing and packaging form of capital is low, have been pharmaceutical enterprise wide attention, and rapid development.
Medical plastic raw materials must conform to the requirements of the pharmaceutical and health care, common plastic varieties are: polyethylene (PE), polypropylene (PP), polystyrene (PS), polyester (PET), etc.
Polyethylene (PE) has corrosion resistance, can be chlorinated.Polyethylene is divided into high density (HDPE), low density (LDPE) and linear low density (LLDPE).HDPE melting point, high hardness and strength, small water imbibition, good workability and radiation resistance, often used in the production of tablets of plastic bottles;LDPE flexibility, elongation and impact strength is good, can be used in eye drops of plastic bottles;LLDPE high impact strength, fatigue resistance, wear resistance, less application in pharmaceutical packaging.
Polypropylene (PP) small density, strength, hardness and heat resistance are better than that of high density polyethylene, but low temperature time-varying crisp, not wear-resisting, easy ageing.But you can add the corresponding additive on modification, modification can achieve the performance of HDPE level.
Polystyrene (PS) is colorless transparent, light transmittance, second only to the organic glass, coloring, water resistance, good chemical stability, strength.But PS very brittle, and prone to stress brittle, not resistant to organic solvent such as benzene and gasoline, so less application in the field of pharmaceutical packaging.But after modification, the material of impact resistance can be greatly improvement.
PET as a pharmaceutical packaging container, has many advantages.First, PET bottle, light weight and strong strength and elasticity significantly higher than that of other plastic material made of plastic bottles, blocking water vapor and oxygen in the commonly used plastic with good performance;The performance of the PET bottle has good resistance to chemicals, in addition to its strong alkali and some organic solvents can be used for all items of packaging, suit to make thin wall, qualitative light, intensity is high medicine bottles, as a result, PET bottle has a tendency to replace the traditional glass bottle. |
Location：
