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OIL FREE SCREW & SCROLL AIR COMPRESSOR SOLUTIONS FOR PET BLOWING
https://www.cmncompressor.com/oil-free-screw-and-scroll-air-compressor-for-pet-blowing.html


OIL FREE SCREW & SCROLL AIR COMPRESSOR CHINA SOLUTIONS FOR PET BLOWING
The raw materials of plastic bottles must meet relevant national standards, especially medicinal bottles must meet medical and health requirements. There are four common raw materials for plastic bottles, polypropylene (PP), polyester (PET), polystyrene (PS), polyethylene (PE), etc. With PET compressed air, the materials are made into different forms of bottle containers.

1. Polypropylene (PP)

It has low density, and its strength, hardness and heat resistance are better than those of high-density polyethylene. However, it becomes brittle at low temperatures, is not wear-resistant, and is prone to aging. However, corresponding additives can be added for modification, and the performance level of HDPE can be achieved after modification.

2. Polyester (PET)

PET has many advantages as a packaging container for pharmaceuticals such as eye drop bottles. PET bottles are light and strong, with significantly higher strength and elasticity than plastic bottles made of other plastic materials. Among commonly used plastics, they have better performance in blocking water vapor and oxygen. PET bottles have good chemical resistance and can be used for packaging all items except strong alkalis and some organic solvents. They are suitable for making thin-walled, light-weight, and high-strength pharmaceutical packaging bottles. Therefore, PET bottles have gradually replaced traditional glass bottles.

3. Polystyrene (PS)

Colorless and transparent, its light transmittance is second only to organic glass, and it has good colorability, water resistance and chemical stability. However, PS raw materials are brittle, have average strength, are prone to stress brittle cracking, and are not resistant to organic solvents such as benzene and gasoline, so they are rarely used in the field of pharmaceutical packaging. However, after modification, the impact resistance of the material can be greatly improved.

4. Polyethylene (PE)

It is corrosion-resistant and can be chlorinated. Polyethylene is divided into high density (HDPE), low density (LDPE) and linear low density (LLDPE). HDPE has high melting point, hardness and strength, low water absorption, good processability and radiation resistance, and is often used to produce plastic bottles for tablets. LDPE has good softness, elongation and impact strength and can be used in plastic bottles for eye drops. LLDPE has high impact strength, fatigue resistance and wear resistance, and is rarely used in pharmaceutical packaging such as eye drop bottles.