The recycled polypropylene (PP) technology mostly comes from daily necessities, such as plastic boxes, insoles, buckets, rice baskets, plastic chairs, stools, woven bags, other packaging fabrics, packing belts and so on. 1 First, separate the colors of various materials, because separation will make it convenient for users and the price will be high. 2. After crushing, rinse with water, spin the remaining water with a dryer, and then dry it and bag it. Stir with a blender and add some pigments and additives. 3. The granulating machine is a special plastic machine, but the granulating temperature should not be too high, and it is easy to be brittle, so we must pay attention to the temperature. 4, water-cooled granulation, to the standard 3X4mm, otherwise the good material is not good-looking and not standard. The technological process of recycling polyvinyl chloride (PVC) hard materials mostly come from building materials, plastic doors and windows, electroplated hard plates, plastic valves used in chemical plants, sewer pipes and decorative materials. 1. First, select the process and color separation. These materials are generally divided into white, gray and black, but don't mix PP and PE. 2. Pulverize in a pulverizer or with water. Remove pollution, rinse with water, and then dry in the sun to prevent secondary pollution. 3. Mix ingredients and stir in a blender. If it is white, add some colorants and additives if necessary. 4. Scraping, cooling and bagging are carried out by a special PVC extruder, and the labels are delivered from the factory. The process of recycling ABS plastic ABS plastic is mostly its own electrical products, various daily necessities and some small mechanical parts. 1, ABS is more, computer casing, TV casing, instrument casing, car panel, decorative materials, pick this material apart, especially the colors of electroplating and painting should be separated. 2, chemical treatment, deplating, painting, but deplating paint must be careful, because the chemical liquid has a certain proportion, to use protective equipment and containers, otherwise it will cause injuries and other events. 3, cleaning tank to clean, and then drying, color matching or put accessories, the purpose is to improve the quality. 4. The special extruder can granulate, but it must be equipped with a filter, but the filter depends on the product requirements. 5, cold water granulation, air cooling granulation, granulation standard, 3X4mm, and labeling after packaging. The recycler's low-density polyethylene (LDPE) process LDPE, the scientific name of high-pressure polyethylene, generally refers to plastic packaging film. Such as woven bag lining film, food packaging film, daily necessities packaging film and greenhouse film. Most of these films are natural colors, but also light blue and black. It is best to separate the color samples before recycling. You can't put low-voltage film and PP film together, let alone OPP and PVC film. The recycling of LDPE is the technological process of regenerating LDPE. There are four main processes in the whole process of regenerating LDPE. The first step is the crushing process. The crushing and washing effect is better. Because some good high-pressure membranes can be blown again without adding new materials as long as they are kept clean enough. Therefore, attention should be paid to cleaning during the crushing process, and it is best to crush the crushed materials again when they flow to the sink, so as to further flush the cleaning points. The second step is the drying process. Generally, the residual water should be dried by a dryer, and if possible, it can save electricity and improve the quality. Of course, attention should be paid to prevent secondary pollution of materials during drying. The third step is the granulation process. Particles made by special extruder have two basic uses: re-blowing film and injection molding. The material coming out of the 60-80 mesh filter can be blown again; The materials from the 40-60 mesh filter can meet the quality requirements of injection molding. Generally speaking, if the high-pressure material blows the film again, the black film and garbage bag will be blown almost the same, and the price will be lower after injection molding. The fourth step is granulation process, usually cold water granulation. In this process, we must pay attention to distinguish labels when packaging. One blow molding and one injection molding to avoid mistakes. In addition, blow-molded packaging bags must be lined with outer bags to avoid secondary pollution. Process for recycling polycarbonate (PC): polycarbonate, amorphous plastics and engineering plastics. Most of them come from textile accessories, car headlights, taillights, turn signals, candy making molds, discs, telecommunications equipment, photographic equipment and so on. 1. First, choose the PC to buy, which is transparent and opaque, and blue, red, green and black must be separated; There are also modifications, such as textile accessories are mostly modified; For example, optical discs and lamp holders are coated. 2, cleaning all kinds of PC, as well as disc lamp holder and other deplating processes, the operating principle is also the same as ABS. Then dried in the sun, sorted and sent to an extruder for production. 3. Some PCs are yellow and can produce China white; Transparency or transparency; Colorants and material additives can be added to other colors. 4, special extruder granulation, but PC itself is easy to age, so it can not be returned many times, granulation must be careful, cut into pieces and packaged. The recycled polyethylene terephthalate (PET) is a linear thermoplastic. PET is usually a crystalline plastic. PET bottles have replaced some traditional packaging materials because of their light weight and low energy consumption, and are widely used in food, beverage, cosmetics and other fields. The recycling of PET is the technological process of regenerating PET. The recycling process of PET bottles is to separate PET bottles from bottle caps and labels, and then crush, clean and dry them. The specific process is as follows: 1. Selection process: All kinds of PET bottles are selected and classified. Tear off the outside logo. Most of these trademarks are OPP, and some PVC shrink films must be peeled off first. The second step is the crushing process, in which water is washed to remove the dirt in various PET bottles. Step 3, put these fragments into a steam treatment device and add flaky alkali to remove stubborn impurities such as greasy. Step four, wash with clear water, shake off the remaining water, and bag. And then dried in a vacuum oven. Step five, spinning, setting, hot water and steam stretching, and setting again.