Nylon tube deformation and shrinkage problem. It should be caused by the glass fiber orientation of reinforced nylon, which is easy to appear in reinforced plastics. To solve this problem, we must start from the material itself and select good materials for processing.
Quality identification of nylon tube: The appearance of nylon is milky white to light yellow, uniform particles without mechanical impurities and surface moisture, the particle size is greater than 40 particles/g, and the particle content does not exceed 2%. It is characterized by good toughness, shock resistance, high mechanical strength and heat resistance, good impact strength, high melting point, good molding and processing performance, high water absorption, saturated water absorption of about 11%, easily soluble in formic acid, low temperature brittleness temperature minus 20 degree. Stainless steel spiral wave tube and elliptical metal aluminum duct are different.

Nylon tube is transparent: it has good tensile strength, impact strength, rigidity, abrasion resistance, chemical resistance and surface hardness, high light transmittance, similar to optical glass. The processing temperature is 300-315°C. During the molding process, the barrel temperature should be strictly controlled. If the melting temperature is too high, the product will be discolored due to degradation, and if the temperature is too low, the transparency of the product will be affected due to poor plasticization. Try to keep the mold temperature as low as possible. High mold temperature will reduce the transparency of the product due to crystallization.
The reason for the deformation of nylon parts is moisture absorption, so they can be put into cold water immediately after being removed from the mold. The post-treatment method is generally to use potassium acetate and boiling water to adjust the humidity to solve the deformation and internal stress, and then perform lathe processing. The ratio of potassium acetate to water is 1.25:1.
Nylon tube has high mechanical strength, rigidity, hardness, toughness, good aging resistance, good mechanical damping ability, good sliding performance, excellent wear resistance, good processing performance, no creep phenomenon, good resistance Grindability and good dimensional stability are used for accurate and effective control. The performance of car air-conditioning bellows is also very strong.