It can be equipped with a scrolling display that displays 300-500 words of display content. It can also be equipped with intelligent infrared probe anti-collision device, which can automatically return to work when people or foreign objects are 20-30CM, thus ensuring the safety of vehicles and pedestrians.It can automatically open and close when automatic clutch is cut off. Manually open and close when manual clutch is cut off. The control system has control panel, push button switch, and other requirements. Equipped with wireless remote control.The door body is made of high-quality stainless steel and aluminum alloy profiles, and is hinged by the parallelogram principle. The drive is driven by special motor, worm and worm gear deceleration, and has automatic clutch or manual clutch. Factory Sliding Retractable Gate,Aluminum Alloy School Sliding Gate,Automatic Electric Single Double Gate,Store Retractable Gate Shenzhen Hongfa Automatic Door Co., Ltd. , http://www.hfautodoors.com
What are the performance of HDPE?
HDPE (High Density Polyethylene Resin) is compared with LDPE (Low Density Polyethylene Resin): high density, high crystallinity, high temperature resistance, oil resistance and high strength. However, due to the high viscosity of the melt, it adds a certain difficulty to the molding process. The performance of HDPE is as follows:
1. HDPE is milky white. Opaque waxy particles (also powdered), non-toxic, tasteless, slightly heavier than LDPE.
2, HDPE branches are very few, high crystallinity (75% -90%), the transparency of its products is not as good as the transparency of LDPE products.
3. HDPE has better stiffness, tensile strength, mechanical strength and heat resistance than LDPE. Its products can be used for a long time at temperatures not higher than 80 °C.
4. The electrical insulation, toughness and cold resistance of HDPE products are also good, but not as good as LDPE.
5, water absorption is very low (not more than 0.03%), good chemical stability.
6. Select HDPE, pay attention to the effect of density on performance: if the density is increased, its tensile strength, toughness, softening temperature and chemical resistance will also increase, but its low temperature impact strength, elongation and permeability Will fall. If the relative molecular mass is improved, but the melt viscosity will also increase, which will bring certain difficulties to its molding process.