A fully degradable plastic called starch/polyvinyl alcohol alloy has been successfully developed by Beijing Fengyang Plasticization Engineering Technology Co., Ltd. The company successfully produced melt pellets using a self-developed large-diameter, high-speed twin-screw extruder with the same high-diameter ratio, indicating that this technology can be realized in industrial production. 
The company's initial production capacity has reached an annual output of 500 t (scale of pilot production). The company plans to build an annual production capacity of 5,000 tons during the “Eleventh Five-Year Plan†period. The main components of starch/polyvinyl alcohol alloys are starch and polyvinyl alcohol, both of which can be completely degraded by the life activities of microorganisms in nature. The film made of this raw material can be completely degraded after it is placed in outdoor water.  
Parking locks, also called parking space locks, parking barriers, is installed in the front or middle of parking space to protect space from being occupied.
Features
1.Easy installation: four prepared holes at the bottom of the cabinet makes it easy to install.parking lot
2.Manual operation: to operate the parking locks rising and going down manually with manual at emergency situation.
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TAISHAN YUEXIN INDUSTRIAL GROUP LIMITED , https://www.tsyuexin.com