Bharani Enterprises company |
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Plastics Details... | Coir Fiber Details... | |
ABS | HIPS | HDPE | LDPE | PA | PP | Filled Compound Plastic |
ABS is extensively used in the manufacture of inexpensive, durable products. The durability of ABS has made it a primary material in the manufacture of products such as, computer housings, televisions and computer monitor housings, automobile components, etc.
As virgin ABS is somewhat expensive, recycling ABS is economically very attractive. Recycled ABS can be blended with virgin material to produce products with lower cost while preserving the high quality.
ABS is recycled by first shredding used plastics to produce shredded plastics. After this step, metals and undesirable plastics are separated from the shredded plastics to produce separated plastics. This separation process is often accomplished by using a water system with different velocity water streams on top of each other. After the material composition of the separated plastics has been analysed, the recovered ABS can be blended with virgin ABS to produce a desirable recycled plastic. Back to top
Polystyrene is a plastic material having many uses and is
particularly useful, when in a foam form, as a material for making
food containers. It is a significant constituent of municipal solid
waste and is particularly prevalent in waste from fast food
restaurants, cafeterias and similar food service establishments.
Such establishments commonly use trays. containers and cups made of
polystyrene foam (PSF). Also used in Radio housings, televisions
and Refrigerator inner casings, disposable tumblers, ice cups
Fast food restaurant and cafeteria waste in addition to containing
large amounts of PSF also commonly comprises a large proportion of
paper products (such as bags, cups and napkins), wax-coated paper
products, condiment containers, plastic eating utensils and food
morsels.
Recycled polystyrene foam can be used to manufacture a wide variety
of products such as plant pots, plastic desk organizers, foam
construction insulation etc. and is therefore, a valuable product.
Further, polystyrene foam, like most plastic, takes a very long
time to degrade when placed in landfills. Therefore, it is
desirable to recycle polystyrene foam to reduce the amount of such
plastic in municipal landfills.
Polystyrene can be recycled by first reducing it's size through a melting process. After this the the material can be transported to a pelletitzing facility in order to produce PS (GPPS), HIPS, EPS etc. These pellets can be used alone or blended with virgin material for better material properties. If PS is mixed with other materials, such as paper, the waste PS will first have to go though an advanced process of separation. Currently research is being done to see whether such a process would be economically viable.
Tensile Strength2.20 - 2.70 N/mm
Notched Impact Strength10.0 - 20.0 Kj/m
Thermal Coefficient of expansion80 x 10-6
Max Cont Use Temp60 - 80 oC
Density1.03 - 1.06 g/cm3 Back to top
PE is made in 2 main types: HDPE and LDPE. It is a polyolefine. LDPE is usually a soft plastic type. It is tough, though not very strong and has a reasonable impact resistance. Making PE stronger with glass fibre is not usual practice. PE has excellent isolation properties, making it suitable for electrical isolation. Furthermore, PE is resistant against acids, bases, saltsolutions, water, alcohol and oils.
HDPE can be used until 105 degrees celsius and becomes breakable at minus 50 degrees celcius. 45% of all HDPE are casted into various products such as buckets, crates etc. 40% is being blowmoulded into containers or bottles. These bottles are suitable for carrying various liquids except for drink which contain carbon dioxide. The reason for this is that HDPE bottles are permeable for gasses which will cause the carbon dioxide to slip out.
The recycling process of HDPE bottles starts by breaking apart the bales and grinding the bottles into small flakes. Often the bottles have been separated by colour beforehand. These flakes are then washed and floated to remove any heavy (sinkable) contaminants. This cleaned flake is then dried in a stream of hot air and may be boxed and sold in that form.
More sophisticated plastic plants may reheat these flakes, add pigment to change the color and run the material through a pelletizer. This equipment forms little beads of plastic that can then be reused in