Fluorine polymer of high performance resin, has in recent years can be made of fiber, more and more attention in the production of senior fabric and reduce the production of pollution and so on, soon gained widespread application, the representative materials when pushing the polytetrafluoroethylene (PTFE) resin.
PTFE will also be polymer powder, extending into sheet materials in hot roll extrusion, powder are complex as a film material is very thin, then stretched as shown below the micro porous material.
Microporous film according to its development can be divided into two categories: PTFE resin after crushing, become fibrous powder made by wet processing, sheet material, called PTFE for non woven materials; the other one is PTFE emulsion polymer, rolling film, below the polymer melt temperature one-way or two-way tensile, tensile (expanded) PTFE microporous membrane, the thickness is 0.55 to 1 microns, void ratio is 75%, the maximum diameter of 20~45 microns. With different tensile conditions, the thickness range can reach 0.01~1.0 m, average pore diameter of 0.02~1.5 microns, void ratio is 25 ~ 95%, product heat-resistant, resistant to chemicals, oil repellent, water repellent, not adhesion, flame retardant, low friction coefficient, aging. PTFE microporous membrane has excellent waterproof and moisture permeability, microporous membrane surface can prevent moisture penetration, and the steam can escape through the many internal microporous free. PTFE staple fiber and nonwovens such nonwoven has stable heat resistance and chemical resistance, melting temperature up to 325 ℃, the melt viscosity is high, cannot use the melt spinning method; almost insoluble in the solvent, it is difficult to use the general wet spinning. At present, only with the emulsion polymer, polymer particles as matrix (matrix), added to the spinning raw material production. In particular to 40% PTFE emulsion as matrix and 2-3% viscose material drawn fiber in wet spinning system usually, after washing, drying, glue in the decomposition temperature of about 390 DEG C for 10 seconds, continuous heating, PTFE Adhesive Tape become PTFE filament.
Fluorine resin film since developed into fluorine resin can be extruded, film manufacturing cost reduction. This material can protect the underlying substrate composite material. Such as polytetrafluoroethylene (PTFE), fluorinated ethylene propylene (FEP), poly fluorinated acrylate (PFA), porous PTFE Fabric polyethylene (EPE), PTFE Coated Fabric poly three vinyl chloride (PCTFE) fluoride, polyvinylidene fluoride (PVDF), ethylene tetrafluoroethylene copolymer (ETFE), porous chlorine three fluorine ethylene (ECTFE) and poly fluoride ethylene (PVF 'Tedlar'). Fluorine resin compared to other plastic prices still higher, in order to reduce the cost and adding other properties, can and other polymer film, non-woven cloth, composite, materials and product.
12.11.2013 (4598 Days Ago)
