Utilization of Foam Plastic Waste Polystyrene

Polystyrene is mainly used in the form of foam plastics for shockproof packaging materials such as TVs, refrigerators, washing machines and other home appliances, precision instruments and handicrafts. It is also used in food packaging such as fast food lunch boxes, and can also be used as insulation material. Most of these packaging materials are disposable and become waste products when they are used up.
1 There are two methods for reprocessing polystyrene foam: one is direct foaming and the other is expandable beads. Both of these methods are physical processes that do not destroy the polystyrene polymer structure, leaving it still maintaining its original properties. Therefore can be recycled. Take the discarded snack box as an example. The process flow is:
Abandoned snack box→washing→drying→crushing→forced feeding→pre-plasticization→extruded plasticization(with head quick change filter)→molding→cooling→granulation→bagging and granulating conditions are not required, FLS can be used -75 extruder.
2 The density of the waste polystyrene foam produced in the construction of cement products is 20 to 25 kg/m3. After processing and mixing, the wet density of the concrete is 220 to 270 kg/m3, which is equivalent to the expansion of rare ball rock. The density after drying can also be Greatly reduced, there are no special requirements for the cement blended with it.
The use of waste polystyrene foam as a light building material has a variety of manufacturing methods. For example: Styrofoam particles, cement as a binder, crushed woodwool as a filler, mixed with water, and molded into lightweight lightweight cement partitions at the beginning. It is also possible to combine plant fibers with Portland cement to form a thin sheet. A mixture of styrofoam and cement is filled in between the two sheets to make a lightweight solid wall panel, which is particularly suitable for use as a non-load-bearing wall inside and outside a building. .
3 Preparation of paint polystyrene transparency of up to 90%, refractive index is 1.59 ~ 1.60, with it coated in polypropylene, ABS and other plastics for vacuum coating primer, can increase the height of the plastic coating film, of course It can also be used to produce general anti-rust paints and furniture paints. Chloroform, banana water, xylene, dibutyl phthalate, glycerol, rosin-modified phenolic resins, rosin, methyl cellulose, aluminum stearate, and pigments can be used.
Steps: Cleaning Wash, decontaminate, degrease, and dry the collected PS plastic. After washing the waste plastic (PS) to remove the remaining water to dry, dried or dried for preparation.
The washed and dried waste plastic is properly crushed and put into a reaction vessel with a stirrer, and immersed for one day by adding a proper ratio of phenolic resin, methylcellulose, rosin and mixed solvent (chloroform, banana water, xylene).
After soaking for more than 3 hours, it is dissolved and modified into a uniform glue-like solution, and the glue solution put in the stick is dripped and filtered in a linear manner.
The above colloidal solution is filtered through a 80 mesh copper screen to obtain a qualified modified plastic glue, which can be used for manufacturing various paint color pastes. The pigment is selected, added with an appropriate solvent, ground to the required fineness with a ball mill, and then filtered with a 100-200 mesh copper screen to obtain a color paste.