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News and Information |
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| The physical properties of polypropylene |
Time：2015-1-31 |
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| Polypropylene is non-toxic, odorless, tasteless and milky highly crystalline polymers, The density is only 0. 90 -. "0 91g / cm3,It is one of the lightest of all varieties of plastic currently .it is particularly stable to water. The rate of water absorption is only 0.01% The amount of molecular is about 80000- 150 000. Moldability is good, but because the shrinkage rate is high (1% to 2.5%). thick-walled products is easy to depression.For a number of high dimensional accuracy parts, it is difficult to meet the requirements.Surface of the product is gloss and easy colored。 |
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