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« في: يناير 05, 2005, 03:58:04 مساءاً »
PVC Poly(vinyl chloride) is the plastic known at the hardware store as PVC. This is the PVC from which pipes are made, and PVC pipe is everywhere. The plumbing in your house is probably PVC pipe, unless it's an older house. PVC pipe is what rural high schools with small budgets use to make goal posts for their football fields. But there's more to PVC than just pipe. The "vinyl" siding used on houses is made of poly(vinyl chloride). Inside the house, PVC is used to make linoleum for the floor. In the seventies, PVC was often used to make vinyl car tops.
UPVC or Hard Rigid PVC used to manufacturing Pipes and Potable water
supply.
Plasticised Polyvinyl Chloride - Plasticised PVC – PPVC Applications Seals, gaskets, simulated leather cloth, cable covering, tape, bottles, sachets, heat-shrinkable tubing, wall covering, flexible floor coverings, 'leather cloth' for upholstery, hoses, tubing.
polyamide (nylon) : applications : apparel dresses, cycle water,swimear, home furnishing, speep bags thread, fishing line
Paraformaldehyde is a white crystalline solid formed by polymerization of methanal gas (formaldehyde, HCHO) by heating. It is soluble alkali but insoluble in alcohol, ether, and water. It is used as fumigant, disinfectant, and fungicide. It is used to make various resins with mainly phenol (melamine resin; phenol resin; vinylon; polyacetal resin; terephthalic acid; diphenyl methane diisocyanate, acrylic acid esters)