How did waste plastics produce

In our daily life and agricultural production in various fields, plastic products everywhere, when the life of these products or the purpose of use, will be discarded and become waste plastics. , of course, the source of waste plastic is not limited to this, in the recycling dealer network said earlier, in the plastic synthesis, molding processing, circulation and consumption of each link will produce waste or waste products. Its specific sources are mainly the following aspects.

1, resin production of waste

Waste paper produced in the production of resin in the following 3 aspects:

1. Post accessories scrape down the reactor on the inner wall of the polymerization process (commonly known as "crispy") and unqualified material reaction.

In the process of mixing and mixing process, the cleaning machine of the extruder and the non conformity.

3. Transportation, down storage process (throwing material) and dregs material.

The amount of scrap depends on the complexity of the polymerization, the number of manufacturing processes, the production equipment and the level of operation. In all kinds of resin production, the production of polyethylene waste is the least, PVC produced by the most waste.

2. The waste generated during the process of forming

In all kinds of Molding Thermoplastics are will produce varying amounts of waste and scrap, reject. % 40turning wear solid material waste, such as injection molding in the six cold material gate cold solid material, cleaning machine for waste, waste edge; extrusion molding machine, repair the leftover material and the final product of wearing truncation; blow molding process of blow molding machine wear billet export, equipment of cold and clear waste material machine and hollow container flash (production with the bottle when the fart mouth scrap rate can reach; calendering processing from the mixing machine, calender falling scrap, scrap and waste products; rotomolding die type county spillage, remove the side seam material and waste.

Thermosetting plastics in the molding process will also produce waste, waste, such as waste has occurred, the crosslinking reaction, the recycling of these waste is very difficult.

3. The waste generated in the process of mixing and mixing.

Blended the regeneration process of waste accounted for only a small part of all waste plastic, they are defective in mixing equipment cleaning and removal of waste and the normal operation of, and most of them can be recycling of waste plastics.

Two, 4 processing of waste

Two processing is usually from the molding processing factory to buy the plastic semi-finished products through transfer printing, sealing, heat molding, machining and other processing into finished products, where the production of waste materials often more difficult to deal with than the processing factory production, such as printing, electroplating and other waste, to the printing layer, the electric plating process is very difficult and cost, and direct crushing or granulation to get recycling, its value is much lower. The waste edges and waste particles produced by the thermal forming and machining of the machine, and the recovery and regeneration of the waste materials are relatively easy.

5, consumption of plastic waste

This kind of waste plastics is widely used, and the use of the situation is complex, and it must be treated before it can be recycled.

6, urban living garbage in the waste plastics

This kind of waste plastics are also used in the consumption of plastic, because of its large number, recycling, has been a serious threat to the environment, is the focus of future recycling work, so it will be classified separately. China's urban living garbage, waste plastics%2~%4, most of which are one-time packaging materials, they are basically recycling of polyethylene (PE) foam, polypropylene (PP), polystyrene (EPS) foam recycling , polyvinyl chloride (PVC), polyethylene terephthalate (PET), etc.. In these waste plastics, polyolefin (PO) accounted for%70.

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