Save our environment, do use recycle bag

Do you ever use a recycle bag before when you are shopping? It is now sells in many markets and also advocate by environmentalist. Recycle bag is thinking out for replace plastic bag, as trash of plastic has affected environment a lot.

What is plastic?

Plastic is typically polymer of high molecular weight, and may contain other substance like plasticizing agent, stabilizing agent, lubricant, coloring agent and so on to improve performance and reduce costs.

There are two types of plastics: thermoplastics and thermosets. Thermoplastics, if exposed to enough heat, will melt. Thermosets will keep their shape until they are charred and burnt. Some examples of thermoplastics are grocery bags, piano keys and some automobile parts. Examples of thermosets are children's dinner sets and circuit boards.

Type of plastic:

★Polystyrene (PS)

Polystyrene is a vinyl polymer. Structurally, it is a long hydrocarbon chain, with a phenyl group attached to every other carbon atom. Polystyrene is produced by free radical vinyl polymerization, from the monomer styrene.

★Polyvinyl chloride (PVC)

Polyvinyl chloride is produced by polymerization of the vinyl chloride monomer (VCM). It is stable, not corrosion by acid and alkali easily, and quite heat-resisting.

Characteristic of plastic:

v Bears chemical corrosion

v Gloss, some part transparent or translucent

v Majority are good insulator

v The weight light and firm

v Processes easily , price cheap

v Versatility, effectiveness many, easy to color, some part thermostable.

Benefit of plastic:

v Majority of plastic has high resistance corrosion ability, not response with acid and alkali.

v Production cost low.

v Durable, waterproofing, weight light.

v Easily makes the different shape.

v Good insulators.

v Plastics may use in preparing the bunker oil and the fuel gas, this may reduce the crude oil consumption.

Disadvantage of plastic:

v Difficult to classification when we recycling, moreover it is fall short of economy.

v Combustion plastic may produce noxious gas. For example when polystyrene combustion produces the toluene, this material will cause to lose one's sight.

v Plastics are made by the petroleum refining product, the oil resource is limited.

Scientific name	Shortened form
Polyethylene Terephthalate		Possibly releases carcinogen after using ten month or when fill in hot water, it has toxicity to human body
High Density Polyethylene		commonly use as plastic container of cleanser
Polyvinyl Chloride		Burn trash of PVC will produce dioxin, may cause cancer.
Low Density Polyethylene		Low ability of heat-resistant
Polypropylene		Heat-resistant about 130℃
Polystyrene		Cannot use to fill with strong acid (e.g orange juice), alkalinity material and also will release toxicant.
Polycarbonates	PC	Should not fill in hot water. If the vessel has breakage, stop using.

♥REDUCE USING PLASTIC BAG, SAVE OUR ENVIRONMENT♥