DuPont PA66, DuPont 45HSB, USA
Category:
Rubber and plastic/engineering plastic/PA66
Model:
Brand:
DuPont, USA
Retail Price
35.00USD
重量
kg
- Product Description
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Description :
DuPont PA66, DuPont 45HSB, USA
Our company covers a wide range of plastic types, with complete models and genuine products at reasonable prices. You can directly contact Ms. He.
The ability of plastic in a molten state after being heated to fill the entire mold cavity under pressure is called fluidity, which is generally tested using a fluidity testing mold
The flowability of plastics of the same type but different grades varies, and different structures of plastic parts have different requirements for the flowability of plastics. The flowability of plastics is closely related to conditions such as molding temperature and pressure
Usually, if the fluidity is too high, on the one hand, it will cause the filling of the melt to be not tight, resulting in looseness of the product and affecting its quality; On the other hand, excessive fluidity can lead to burrs, sticking to the mold, and nozzle casting around the injection molded parts, causing blockage of the water outlet However, the flowability of plastic is too low. For plastic parts with complex structures and long processes, it is difficult to flow during injection molding, and it is prone to phenomena such as missing glue and shrinkage, resulting in a large amount of waste; Or high-pressure injection molding may be necessary, which can easily cause excessive internal stress in the plastic parts We need to choose plastic molding with appropriate fluidity based on the product structure, size, and thickness
If the moisture and volatile substances in the plastic exceed a certain proportion, many problems will occur during injection molding (such as degradation, fogging, reduced strength, etc.), and in severe cases, bubbles (silver lines) and rough surfaces can be generated. For transparent products, the transparency is damaged (cloudy and unclear), and it is difficult to ensure the accuracy of precision plastic parts
However, absolutely dry plastics can cause a decrease in fluidity, an increase in brittleness, difficulty in filling molds during molding, and are also unusable. This should be particularly noted. Some people believe that the more thoroughly plastic is dried, the better, but this is a misconception
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Key words:- DuPont PA66
