Agricultural film regeneration methods and uses (on)

Films are a large group of plastic products. They have a wide range of types and they have a short service life. They are one of the main types of recycling and recycling applications, and they are used according to their purposes and examples.

Agricultural film:

Agricultural films mainly include plastic film and plastic film. PE film is mainly used for plastic film, PE, PE/EVA, and PVC film are used for the plastic film. When recycled and recycled, PE film and PVC film should be separated. Agricultural film is generally dirty. Often with dirt, sand, grass roots, nails, iron wire, etc., to remove iron impurities and cleaning, recycling method is mainly granulation, if, with manual sorting, cleaning conditions, after cleaning, after drying Waste film can be directly used to produce plastic products with hot extrusion methods, such as pots, buckets, plastic flanges and so on.

The use of recycled agricultural film pellets is as follows:

1. PE recycled pellets:

PE recycled pellets can be used to produce agricultural film, but also can be used to make fertilizer packaging bags, garbage bags, agricultural reclaimed water pipes, fences, tree supports, pots, buckets, waste bins, and geotextile materials.

2. PVC recycled pellets:

PVC recycled pellets can be used to produce heavy packaging bags, agricultural water pipes, shoe soles, and other packaging films. The packaging film materials include cellophane, PE, PVC, PP, EVA, PVDC, PA, PET, and various composite films. . The single-layer packaging film of a material, after being sorted and washed, can be directly made into a plastic product like a farm film or granulated and made into various products. Composite films include composite films of different plastics and films made of plastics and paper, aluminum foil, and other materials. Recycling after recycling is more complicated such as:

Multilayer plastic composite film: Multilayer plastic composite film includes PE/PP, PE/EVA/PE, PE/adhesive/PA/adhesive/PE, PP/PVDC, etc. The material is separated. Solvent separation can be used.

The paper-plastic composite film and paper-plastic composite film must be separated from paper and plastic prior to recycling. This is also a paper-plastic composite separation method. The separation equipment is a chrome-plated hollow barrel with electric heating. The barrel is equipped with a blade. The hollow cylinder, the cylinder and the hollow cylinder rotate in opposite directions. The broken paper-plastic mixture is added to the cylinder. The plastic on the heated mixture in the cylinder is melted and discharged into the lower part of the cylinder. The air in the hollow cylinder is Take away the exhaust gas.

Aluminum-plastic composite film: aluminum-plastic composite film is BOPP / aluminum, PE / aluminum, etc., used for a variety of food packaging, after the use of aluminum-plastic composite soft packaging bag is actually a mixed waste, recycling is more difficult. The method of treatment abroad mainly recovers heat from incineration. China has a method of burning aluminum and crushing and adding fillers to make low-grade crude products. The effect is not ideal. Here is an example of the use of aluminum conductivity, manufacturing antistatic functional materials, the process is as follows:

Aluminum-plastic composite waste - washing - crushing - sieving - pellets - aluminum powder - additives - extrusion - semi-finished products - extrusion - finished products

The aluminum-plastic composite scrap was cleaned, crushed and screened on a 10-day sieve, and then pelletized. This process can be used with a pelletizer from Beijing Plastic Machinery Factory. The granulation process conditions were water spray: 95 degrees water, 0.8 liters, feeding time: 3 minutes; pumping time 5 minutes, grinding time 10 minutes, 15 kilograms each time. The pellets are then extruded using an extruder to form a semi-finished product. This semi-finished product is then added to 20% aluminum powder, flame retardant, compatibilizer and other additives. The product can then be obtained by extrusion granulation. For conductive materials.

(to be continued)