FIREPROOF MEMBRANE-FABRIC MATERIAL Russian patent published in 2010 - IPC D03D15/00 A41D13/00 

FIELD: textile, paper.

SUBSTANCE: fireproof membrane-fabric material made on warp and weft from two-component combined thread, consisting of aramid thread twisted with the second component. At the same time aramid threads are based on polyparaphenyleneterephthalamid, polymetaphenyleneterephthalamid, copolyparaphenyleneterephthalamid or copolyparaphenylenebenzimidazolterephthalamid fibres. Material is arranged as double-layer, containing external fireproof layer and inner membrane layer, at the same time ratio of thickness of inner membrane layer to thickness of external fireproof layer is selected as 0.2-3.0. External fireproof layer is arranged with linear density of 38 tex, breaking load of 10-30 N and permanent strain after rupture of 3.9-4.5% from double-component combined thread, the first component of which in the form of rod represents aramid complex thread or yarn with linear density of 6.3-14.3 tex, and the second component of combined thread in the form of rod braiding with number of turns of 600-900 units/m represents cellulose-containing threads or yarn with linear density of 10-30 tex. At the same time in aramid threads or yarn polyparaphenyleneterephthalamid, polymetaphenyleneterephthalamid, copolyparaphenyleneterephthalamid or copolyparaphenylenebenzimidazolterephthalamid fibres are used with oxygen index of more than 30, and cellulose-containing thread or yarn is represented by modified fireproof viscose thread or yarn. Besides fabric of external layer is arranged by main weaving with surface density of 150-200 g/m² at the following ratio of components, wt %: aramid thread 15-50, cellulose containing thread or yarn 85-50, inner membrane layer of material is arranged with pore size of 0.15-0.65 micrometre from mixture of polyvinylidene fluoride with 24-30 wt % of tetrafluorethylene copolymer. At the same time material of membrane layer has steam permeability at 36°C of 78.5-86 g/m² hour, water-resisting property 1.7-1.8 kgf/cm², bubble point of 0.4-0.6 kgf/cm² and surface density of 20-118 g/m².

EFFECT: invention provides for high water impermeability, high resistance to wind penetration, high aerosol impermeability, sufficient steam and air permeability in removal of excessive moisture from surface of human body skin, high draping ability, and complex combination of incombustibility and fire resistance with sufficient rupture and tear strength.

4 cl, 4 ex