Chemical recycling of plastic waste plastic bottles

bottle beverage bottles, mineral water bottles, liquid food bottles, cosmetic bottles, and other materials used are polyethylene (PE), polyvinyl chloride (PVC), polyethylene terephthalate ( polyester) (PET) and the like. Usually PVC or PET bottles of mineral water manufacturing, manufacturing PET carbonated beverage bottles, soft drink bottles, food bottles with liquid PVC, PE manufacturing, detergent bottles, cosmetic bottles, milk bottles, mostly with PE lactic acid bacteria beverage manufacturing.
recycled bottles and general first by manual sorting, and then different materials for recycling, at present, there are many techniques and equipment used in a variety of recycled bottles
a. Recycling bottle: PET bottles used extensively for Coca-Cola,polystyrene compactor, Pepsi, Sprite and other carbonated beverages, most are made of PET bottles and HDPE bottom composition, cap material HDPE, trademark biaxially oriented polypropylene (BOPP) films, using EVA adhesive adhered to the bottle, PET bottle recycling and then use the route of recycling granulator. Alcohol solution and other methods. Regardless of the method, the first to separate PET bottles and other bottles, also need to be separated from the polyester bottle with the bottom of the bottle. .
1 separation: Mixed by conveyor into additional bottle pulverizer, and then isolated by density.
2 renewable granulation: recycling granulator available extruder. Scrap PET by the extrusion granulation through an extruder into pellets, so as to avoid the absorbent properties of the extrusion viscosity decreased, should be dried prior to extrusion. PET pellets are used as follows:
a, remanufactured PET bottle recycled aggregates can not be used in direct contact with food applications, it may be used for the intermediate layer of the three PET bottles, carbonated beverage bottles made again.
b. spinning manufactured fiber, recycled PET material made of materials can be used to spin fibers, used as a pillow, mattress, sleeping bags, blankets.
c. glass fiber reinforced materials, the glass fiber reinforced recycled PET has good heat resistance and mechanical strength, can be used to produce automotive parts such as automotive wheel covers, heat distortion temperature up to 240 degrees. Bending elastic modulus of 9500MPa, bending strength 214 MPa, impact strength 15kf/m2.
D. Blend modified, recycled PET polymer material blended with other materials, to obtain the variety of materials, such as blended with PE, PET can be obtained to improve the impact properties of blends, PE: PET (10 to 50): (90 ~ 50): if then a small amount of polypropylene, the dimensional stability of the blend be a significant improvement . PE and PET, the polarity difference between the larger, therefore, need to be compatible in the blending process, typically by polymerization of the graft-modified to improve compatibility.
3. alcoholysis, PET waste in the presence of an alkaline alcoholysis catalyst, adding dicarboxylic anhydride condensation to give the product an acid value greater than 12, the diluted, filtered, the catalyst amount, the alcohol can be obtained acid resin paint. Recipe below. The reaction temperature is 80 to 85 degrees, the reaction 4 ~ 5h

Another example is 220 ~ 250oc, the PET waste to react with the polyhydric alcohol, obtained by solvent dimensional network structure of an insulating paint, meet the quality requirements of GB6109, PET bottles can also be used to make: terephthaloyl acid 2 - ethyl hexyl acrylate (DOTP), the plasticizing effect similar to dioctyl phthalate (DOP), electrical properties, low temperature flexibility aspect is slightly better than DOP. Waste PET bottle scrap PET film can also be used with a similar method for manufacturing a polyester adhesive and the unsaturated
two additional PVC bottles:. PVC recovery step below.
PVC bottle washing sorting crushed finely crushed recycled products
first PVC bottle with steam cleaning and removing trademarks and lye, then mechanically and manually point first, by sorting PVC bottles after two secondary crushing, final fineness of 500 to obtain a powdery product 1200μm, the purity of 99.98%
three additional bottles PE: PE materials used in HDPE bottles mainly,How To Recycle Pur, milk bottles, food bottles , cosmetics bottles, after sorting, HDPE recycled bottles can be cleaned by crushing election materials for the following purposes:.
1 spend colored base
2 Coke bottles for the middle core coextruded tubing,Polystyrene Cup Recycling Company. Layer
3. fill talc or glass manufacturing flower cup or injection products.
4. with the fiber composite, as artificial wood, wood fiber and HDPE because of poor compatibility, it must be added with an appropriate coupling or activation of the wood fibers.
5. manufacturing artificial stone, the HD bottle or granular crushed into fine pieces and then glue on the surface of gravel-like yarn, made of metal, and then mixed with concrete or asphalt construction materials for civil engineering .