The simplest method of separation and screening of waste plastics is manual sorting. Although it is time-consuming and laborious and low in efficiency, it is the most primitive method, but it is still widely used, especially on the feeding conveyor belt. It is easy to be found and sorted out. Impurities. Manual picking is best for sorting waste paper, cards, glass containers and more.
Sorting steps:
1. First remove metal and non-metallic impurities such as sand, earth, wood, paper, crepe, thread, hemp rope, glass and porcelain fragments and other impurities visible to the naked eye.
2. For waste plastics, first classify products, which can be divided into agricultural film, natural packaging film, variegated packaging film, foam plastic, sandals, slippers, soles, corner scraps, foam blocks for packaging, beverage bottles, various packaging. Containers, etc.
3. According to the resin variety, according to the plastic identification method, separate polyethylene, polypropylene, polyvinyl chloride, polystyrene, nylon, polyurethane and polyester. Appearance trait identification and combustion identification are usually used.
The classified waste plastics are sorted according to color and quality. The colors can be divided into black, red, brown, blue, green, yellow and colorless, etc., and the inferior waste plastic products such as serious pollution, blackening and charring are eliminated.
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