The raw material difference and grading requirements of turnover boxes

There are two kinds of raw materials for plastic turnover boxes: one is polypropylene (PP) and the other is polyethylene (HDPE). Material of plastic turnover box: Polyethylene (HDPE) Advantages: Large shrinkage, thick-walled products are easy to dent. The water absorption is very small, the water permeability is low, and the organic vapor transmission rate is relatively high. Good impact resistance and cold resistance, resistance to environmental stress cracking. Excellent chemical stability and good oil resistance. At low temperatures, the impact strength is poor. High static electricity, easy to aging in contact with copper. The electrical insulation is good, and the dielectric properties are extremely excellent in all frequency ranges. There are the following requirements for the storage of plastic turnover box goods: single-way or multi-layer storage of fragile goods, and a wooden supporting partition structure is added. Cylindrical metal bottle containers or goods are stacked vertically in a single layer, and a cargo frame and slat reinforcement structure are added; cylindrical goods such as sealed metal containers are stacked in single or multiple layers, and wooden cargo covers are reinforced. Wooden, paper and metal containers and other rigid rectangular goods are stacked in single or multi-layer staggered, stretched or shrink film packaging; paper or fibrous goods are stacked in multiple layers and sealed with straps. Multi-layer staggered compaction and stacking of bag goods. Paper products and textile goods that need to be protected against moisture, water, etc. are stacked in single or multi-layer staggered, stretched or shrink film packaging goods increase corner supports, goods cover partitions and other reinforcement structures. Plastic turnover box manufacturers tell you what is the first-level return material and the second-level return material: raw materials that have not been produced or produced for the first time are called new material production. Those who want to pelletize the product and re-produce are called recycled materials, referred to as the first-level return material. The regrind has a better texture than the secondary regrind.