environmental protection requirements. With the advantages of light, good integrity, no nails, and thorns, on-toxic and tasteless, non-rot, easy to clean, on combustion, no spark, waterproof, anti-explosion and anti-skid, guarantee-free, high recycling value, and so on, it has been widely used in the storage and transportation of many industries such as food tobacco, pharmaceutical, chemical, machinery, electronic appliances, textile, auto parts, beer, and others, which is highly improving the work efficiency.