Polystyrene foam plastic is based on Polystyrene resin As the main body, join foaming agent And other additives. It is the most widely used one Cushioning material 。 It has a closed cell structure, Water absorption Small, good Water resistance ； The density is small, generally 0.015~0.03; Good mechanical strength and excellent cushioning performance; Good processability, easy to mold; It has the advantages of good colourability, strong temperature adaptability, excellent radiation resistance, high dimensional accuracy and uniform structure. So in External wall insulation Zhongqi Occupancy Very high. However, styrene gas that pollutes the environment will be released when burning. stay Architecture It is a Class B material. Polystyrene foam is widely used in various precision instruments, meters, household appliances, etc Cushion packaging It can also be directly made into cups, plates, boxes, etc Packaging container To pack the goods in Special shaft sinking Construction（ Freezing method construction Composite shaft lining ）It is widely used in, mechanical strength Good, excellent buffering performance; Processability Good, easy molding forming; Good colourability, strong temperature adaptability, resistance to radioactivity Excellent and other advantages. gather styrene The main ways for recycling of foamed plastics are: granulation after volume reduction and use as various Filler material , cracking to produce oil or recovering styrene and others. 1、 Granulation after volume reduction: polystyrene foam can be melted Extrusion granulation Make regeneration Granular material However, because of its large size, it is inconvenient to transport, and it is usually necessary to reduce the volume first when recycling. Methods include mechanical method, solvent method and Heating method 。 2、 Crushed and used as filler: polystyrene foam plastic products can be used as filler after being crushed and made into various products.
② Concrete composite plate products
③ Gypsum sandwich brick
④ Used as asphalt Enhancer 3、 Cracking for oil production or recovery of styrene: the device for cracking the waste polystyrene foamed plastic for oil production is as follows:
Pretreatment and heat treatment of waste polystyrene foam to reduce volume catalytic cracking rectification styrene 4、 Others: waste polystyrene foam can be used to manufacture coatings and Adhesive etc. ① Paint: Expandable polystyrene Foam plastic After crushing, add appropriate solvent to make paint, polystyrene Foam plastic can be used for polystyrene bead molding. Used for packaging or freezing of household appliances Food packaging Foam plastic; There are also a few instant noodles The bowl is made of expandable polystyrene beads by injection molding. These plastic products are huge in size and cost a lot of tuition and miscellaneous fees. Their recycling has received special attention in China. 
