Difference between PS material and PET material

Difference between PS material and PET material

PS: polystyrene

Characteristics: Polystyrene is a kind of transparent imitation glass-like material, the proportion of 1.05, and water is basically the same, rigid and brittle, beating, the issue of metal-like "DingDang" sound, crisp sound, commonly known as " Rubber ring. " Non-toxic, tasteless. Pure PS products, fell to the ground, issued a crisp sound, it will immediately cracked.

Because PS has good fluidity, high decomposition temperature and stable melting proportion, it becomes an index parameter for plasticizing efficiency of injection molding machines. The world's injection molding machines are used PS calibration injection molding machine capacity.

The combustion characteristics are flammable and continue to burn after leaving the fire. The top of the flame is golden yellow, which will soften and blister on combustion, no liquid drips and emits black smoke. At the same time, the "sweet smell" of styrene monomer is emitted .

Advantages: Polystyrene acid and alkali resistance and low energy alcohol, by many hydrocarbons, ketones, high fat and other erosion and softening, soluble in aromatic hydrocarbons. Excellent electrical insulation, is a good high-frequency insulation materials, excellent arc. Polystyrene is a highly transparent material with a high surface gloss. Easy to print. Polyst

PET: Polyethylene terephthalate

Characteristics: PET is a milky white or light yellow highly crystalline polymer with a smooth and shiny surface. Creep resistance, fatigue resistance, abrasion resistance and good dimensional stability, small wear and hardness, with the greatest toughness in thermoplastics: good electrical insulation, little affected by temperature, but less resistant to corona. Non-toxic, weather-resistant, good chemical stability, low water absorption, resistance to weak acids and organic solvents, but not soaked in hot water, not alkali.

Advantages:

1. Have good mechanical properties, impact strength is 3 to 5 times the other films, folding good.

2. Oil, fat-resistant, acid-resistant, dilute alkali, resistant to most solvents.

3. Has excellent high and low temperature performance, long-term use in the temperature range of 120 ℃, short-term use can withstand 150 ℃ high temperature, resistant to -70 ℃ low temperature, and high and low temperature on the mechanical properties of small.

4. Gas and water vapor permeability is low, both excellent gas barrier, water, oil and odor properties.

5. High transparency, can block UV light, good gloss.

6. Non-toxic, tasteless, health and safety, can be used directly in food packaging.

Second, PS: polystyrene

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