The plastic hose is a high-grade transparent material, its light transmittance is better than that of inorganic glass, the visible light transmittance is above 92 percent , the ultraviolet transmittance is 73 percent , the refractive index is 1. 491, and the relative density is 1. 19, which is higher than the average Inorganic glass is half as light. Sunlight resistance, after ten years of outdoor use, the light transmittance will only drop by 11 percent . The mechanical strength of polymethyl methacrylate is medium, but its mechanical strength and toughness are more than 10 times higher than that of inorganic glass.
Plastic hose processing features:
Plastic hose processing method The melt flow characteristics of plastic hoses are similar to Newtonian fluids, the melt strength is low, and it is easy to sag during extrusion molding and blow molding. During injection molding, due to the small expansion of the melt passing through the gate, it is difficult to contact the wall of the film cavity, so that the surface of the injection molded product produces swirls or jets.
The molding shrinkage rate of the plastic hose is related to the thickness of the product, the size of the gate, the temperature of the mold and the resin, the injection pressure, and the pressure holding time. The dimensional stability of the molded product is related to the use conditions such as the degree of heat, the degree of crystallinity, and the amount of water absorption. The thickness, mold temperature, and ambient temperature of the product are related to the shrinkage rate after molding. The thinner the wall thickness, the lower the mold temperature, and the higher the ambient temperature, the greater the shrinkage rate of the product.
The main processing method of plastic hose is injection molding, followed by extrusion molding, blow molding and a series of secondary processing.
What are the advantages of plastic hoses?
The reason why plastic hoses can be widely used in all walks of life is that plastics are cheap, light, easy to process, corrosion-resistant, electrical insulation, high-frequency shielding, high specific strength, wear-resistant, self-lubricating and forming. The cycle is short and so on. The application of plastic hose can also reduce the cost of the product and prolong the service life of the product. These excellent characteristics are unmatched by other metals and non-metals.
