Barter is the present and the future of international trade, especially for people who is starting in the import export business. Barter and more: Triangular operations.
that is, some polymers, such as polyethylene (PE), polyvinyl chloride (PVC), polypropylene (PP), polystyrene ) Commonly known as hard plastic, acrylonitrile butadiene styrene copolymer (ABS), polyethylene - vinyl acetate (EVA), polyamide (PA) commonly known as nylon, in addition to some additives and dyes, the structure is more complex species Many. Polyethylene (PE) Polyethylene, referred to as PE, is a thermoplastic resin obtained by the polymerization of ethylene. PE bag is a kind of garbage bag, PE bag is divided into high density and low density. High-density more tough, high transparency, feel stiff, the price is relatively expensive. General supermarket plastic bags are high-density PE bag. Low-density PE bags are the most common type of soft-bag sold in the market. Quality is inferior, transparency is poor, and the price is low. Procter & Gamble choose the most intermediate density between the two, tough but less transparent. PVC (pvc) resolution method: PVC trash bags transparency, stretchability and viscosity than PE trash bags. PVC garbage bags in the use of fire, the flame black, black smoke, pungent odor, will not drip, leave the fire will automatically extinguished. The PE garbage bag burning yellow flame, tasteless, will drip, and left the fire after burning can continue. Garbage bag classification: 1, environmentally friendly and non-environmentally friendly: http://www.garbagebagmanufacturers.com/news/173.html
