MBT Imara Men's Sandals

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PP physics and chemical function index

PP is plastic, chemical name: Polypropylene
English name: POlypropylene (abbreviation PP)
Specific gravity: 0.9-0.91 is overcome / cubic centimeter
Shape shrinkage: 1.0-2.5% shapes temperature: 160-220 ℃
Characteristic:
Density is small, intensity stiffness, hardness hear resistance all polyethylene of excel low pressure, can use in 100 degrees or so. Have good electric performance and high frequency insulating properties not to suffer humidity effect, but become fragile when microtherm,[link widoczny dla zalogowanych] ,, not wear-resisting, easy ageing. Comfortable at making general and mechanical part,[link widoczny dla zalogowanych] ,, anti-corrosive spare parts and insulation spare parts
Shape characteristic:
1. crystallization expects, hygroscopic small,[link widoczny dla zalogowanych] ,, easy happening burst of body of be in harmony, decompose as easily as hot metal contact for a long time.
2. liquidity is good,[link widoczny dla zalogowanych] ,, but contractive limits and contractive value are great, easy happening shrinkage cavity. Dent, be out of shape.
3. cooling rate is rapid, gating system reachs cooling system to answer slow medicinal powder hot, notice control shapes temperature. When high pressure of material lukewarm low temperature easy orientaton, mould temperature under 50 degrees when, model not smooth, easy generation frit is received undesirable, flow mark, 90 degrees of above are easy produce warpage
Thick beard of 4. plastic wall is even, avoid light blanks,[link widoczny dla zalogowanych] ,, pointed horn, in case stress concentration

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