Process Flow Of Five Kinds Of Recycled Plastics

1. Process flow of recycled polypropylene (PP)

Most of PP comes from daily necessities, such as plastic boxes, foot basins, buckets, rice baskets, plastic chairs, stools, woven bags, and other packaging woven fabrics, packing belts, etc.

①First, separate the colors of various materials, because the separation will make the user convenient and the price can be high.

②Crush and rinse with water, spin off the remaining water in a spin dryer, and then dry and bag. Use a mixer to mix and add some colors and additives.

③The special plastic machine carries on the granulation on the car, but the granulation temperature should not be too high, it is easy to become brittle, so you must pay attention to the temperature.

④Water-cooled pelleting should be standard 3x4mm, otherwise the appearance of the best material will not look good or standard.

2. Process flow of recycled polyethylene terephthalate (PET)

PET, scientific name: polyethylene terephthalate, it is a linear thermoplastic.

PET is usually a kind of crystalline plastic. Due to its light weight, not easy to break, and low energy consumption, PET bottles have replaced some traditional packaging materials and are widely used in food, beverages, cosmetics and other fields. The recycling and reuse of PET is the process of recycled PET.

The recycling process of PET bottle flakes is to separate the PET bottle body from the cap, label, etc., and then crush, clean, and dry.

Its specific process is as follows:

①The first step is the selection process: various PET bottle flakes are selected and classified. Tear off the outer trademarks. Most of these trademarks are OPP, and some PVC shrink films must be peeled off first.

②Powdering process, rinse with water during the crushing process to remove the dirt in various PET bottle flakes.

③Put these fragments into a steam treatment device, add flake caustic soda to remove greasy and other stubborn impurities.

④ Rinse with clean water, shake off the remaining water and pack it into a bag. Then go to a vacuum oven for drying.

⑤ Spinning, shaping, stretching with hot water and steam, and shaping again.

Three, ABS plastic process

Most of ABS plastic comes from electrical products, various daily necessities and some small mechanical parts.

①For ABS, the most common ones are computer case, TV case, instrument case, car panel, and decoration materials. The materials should be separated, especially for electroplating and painting color.

②Chemical treatment, de-plating, and de-painting, but de-plating and de-painting must be cautious. Because the chemical potion has a certain ratio, protective equipment and containers must be used, otherwise it will cause injuries and other incidents.

③The cleaning tank is cleaned, and then dried, color matched or auxiliary materials are placed in order to improve the quality.

④Special extruder to granulate, but the filter must be put on, but the filter is placed according to the product requirements.

4. Process flow of recycled polycarbonate (PC)

Polycarbonate, amorphous plastic, engineering plastics. Most of them come from textile accessories, car headlights, taillights, turn signals, candy making molds, discs, telecommunication equipment, photographic equipment, etc.

① First select the purchased PC, which is transparent and opaque, and the blue, red, green, and black must be separated; there are also modified ones, such as most of the textile accessories are modified; such as discs and lamp caps are coated.

②Clean the various colors of PC, and the deplating process of disc lamp holder, etc., also operate on the same principle as ABS. Then they are dried, classified and sent to extruder for production.

③Some PCs are more yellow and can produce porcelain white; transparent ones are still transparent; other colors can be added with colorants and material additives.

④The special extruder makes granulation, but the PC itself is easy to age, so it cannot be recycled many times. The granulation must be cautious, and the pellets are cut and packed.

5. Process flow of recycled polyvinyl chloride (PVC) hard material

PVC hard materials mostly come from building materials, plastic steel windows and doors, electroplated hard plates, plastic valves for chemical plants, sewer pipes, and decorative materials.

① First select the process and separate the colors. These materials can be divided into white, gray and black, but do not mix PP and PE.

②It is crushed by the crusher, but it is also crushed with water. Remove the pollution and wash with water, then dry it to prevent secondary pollution.

③The mixing machine is used for ingredients and mixing. If it is white material, add some coloring agent, and add additives as needed.

④Special PVC extruder is used for scraping pellets, cooling and bagging.