Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
  • D04H3/12—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating with filaments or yarns secured together by chemical or thermo-activatable bonding agents, e.g. adhesives, applied or incorporated in liquid or solid form
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H3/00—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length
  • D04H3/005—Synthetic yarns or filaments
  • D04H3/009—Condensation or reaction polymers
  • D04H3/011—Polyesters
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
  • D04H5/02—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by mechanical methods, e.g. needling
• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
  • D04H5/00—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length
  • D04H5/04—Non woven fabrics formed of mixtures of relatively short fibres and yarns or like filamentary material of substantial length strengthened or consolidated by applying or incorporating chemical or thermo-activatable bonding agents in solid or liquid form
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T428/00—Stock material or miscellaneous articles
  • Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
  • Y10T428/24273—Structurally defined web or sheet [e.g., overall dimension, etc.] including aperture
  • Y10T428/24322—Composite web or sheet

Definitions

• the present invention relates to a nonwoven fabric which consists predominantly of synthetic fibers and is provided with a layer of inert fibrous solid particles, and which is suitable for use as a carrier web in roofing membranes which are resistant to flying flames and radiant heat.
• roofing sheets are usually coated on one or both sides with bitumen, but can also have a coating of elastomers or plastomers.
• laminates such as those e.g. are described in DE-PS 28 27 136, used as a carrier web.
• a laminate of a synthetic fiber fleece and a mineral fiber fleece from DE-GM 77 39 489 is known as a carrier web for roofing membranes.
• the two non-woven layers made of synthetic and mineral fiber material are bonded to one another there by binding or gluing.
• Thermoplastic and crosslinking thermosets are used for this.
• Such carrier sheets lead to roofing and sealing sheets with sufficiently high processing stability Bituminizing and laying. Their dimensional stability even allows single-layer installation on the roof. The fire behavior of these roofing membranes according to DIN 4102 / Part 7 is significantly improved by the mineral fiber layer.
• the coating compound e-at the processing temperatures of the B and the roofing membrane behaves even inert, however, forms a substantially closed, preferably foam-like layer at higher temperatures.
• nonwoven fabric according to the invention. Surprisingly, it was found that the fire behavior of nonwovens made from fibers or filaments consolidated with a binder or from roofing membranes produced therefrom is significantly improved if the nonwoven contains a layer of inert fibrous solid particles distributed in the binder.
• Inert means that the solid particles are resistant to the attack of heat and fire, i.e. are not or hardly inflammable.
• Fibrous solid particles are to be understood as those whose spatial extent is at least one dimension large compared to the effective opening width of the fleece layer, as described for geotextiles in volume 56 (1983) of the communications of the Franzius Institute for Hydraulic and Coastal Engineering at the University of Hanover , Page 379 to 381 is defined.
• fibrous solid particles examples include mineral fibers, in particular so-called short-cut fibers, such as are used for the production of wet nonwovens, and by cutting or grinding mineral wool, glass fibers or ceramic Fibers are made. These mineral fibers usually have diameters between 5 and 50 ⁇ m, their length can be between 50 ⁇ m and 18 mm. In practice, however, the upper limit of the longitudinal expansion of the fibrous solid particles is determined by their dispersibility in the dissolved or emulsified binder.
• shaped structures made of inert materials can also be used as fibrous solid particles, provided that their spatial extent in at least one dimension is large compared to the effective opening width of the nonwoven layer and insofar as they can be dispersed in the binder.
• flameproofed cellulose fibers or other fibers can also be used as inert fibrous solid particles, which impart non-flammable properties to the nonwoven fabric according to the invention which are not exhibited by single-material nonwovens, e.g. Coloring or dyeability, better adhesion to coatings, hydrophilicity or hydrophobicity, electrical conductivity or antistatic effects (metal fibers), or different shrinkage properties to create curling effects. .
• Binders are often used in the form of aqueous dispersions or aqueous solutions for the consolidation of nonwovens.
• Known binders in the form of aqueous dispersions are homopolymers, copolymers or terpolymers made from acrylic acid esters, acrylic acid amides, acrylonitrile, butadiene and styrene.
• binders are particularly suitable for the production of the nonwoven fabric according to the invention Basis of water-soluble urea-formaldehyde, melamine-formaldehyde, phenol-formaldehyde condensates or water-dispersed polymers of vinylidene chloride and vinyl chloride, which are used alone or in a mixture.
• the binders can be made according to various, e.g. described in "Vliesstoff", G. Thieme Verlag Stuttgart, New York, edited by J. Lünenschand and W. Albrecht 1982, pages 177 to 199.
• the most common method is padding in a trough followed by a pair of squeeze rollers. Water is removed from the binder by the action of heat and the binder-filament bond is formed.
• the nonwoven fabric to be consolidated with these binders can consist of fibers or filaments made from the known synthetic polymers.
• the inert fibrous solid particles are preferably added to the aqueous binder liquor and kept in suspension by stirring. Sedimentation of the solid particles can also be done by adding a thickener, e.g. based on soluble cellulose derivatives.
• the binder with the inert fibrous solid particles dispersed therein is applied from one side to the nonwoven made of fibers or filaments made of synthetic Polymers applied.
• a layer-like accumulation of the inert fibrous solid particles first forms, which during the subsequent evaporation of the water introduced into the nonwoven with the aqueous binder suspension and the hardening of the binder is firmly embedded in this binder together with the solidified nonwoven made of fibers or filaments forms the nonwoven according to the invention.
• the size restriction of the inert fibrous solid particles to those with a spatial extent in at least one dimension that is large compared to the effective opening width of the nonwoven layer is crucial, since this largely prevents penetration into the underlying nonwoven layer.
• the proportion of inert fibrous solid particles in the nonwoven fabric according to the invention can be between 30 and 200 g / m 2 , that of the other fibers and filaments can be 50 to 350 g / m 2 .
• the proportion of the inert fibrous solid particles in the total weight of the nonwoven according to the invention should be between 10 and 50%, preferably between 20 and 30%.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• General Chemical & Material Sciences (AREA)
• Nonwoven Fabrics (AREA)
• Building Environments (AREA)
• Laminated Bodies (AREA)
• Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=6246604

Family Applications (1)

Country Status (8)

Cited By (2)

Families Citing this family (1)

Citations (2)

Family Cites Families (2)

• 1984
  • 1984-09-28 DE DE19843435640 patent/DE3435640A1/de not_active Withdrawn
• 1985
  • 1985-09-16 EP EP85111673A patent/EP0176848A3/fr not_active Withdrawn
  • 1985-09-25 FI FI853680A patent/FI853680L/fi not_active Application Discontinuation
  • 1985-09-26 US US06/780,556 patent/US4657801A/en not_active Expired - Fee Related
  • 1985-09-27 AU AU47974/85A patent/AU4797485A/en not_active Abandoned
  • 1985-09-27 NO NO853810A patent/NO853810L/no unknown
  • 1985-09-27 ZA ZA857468A patent/ZA857468B/xx unknown
  • 1985-09-27 JP JP60212734A patent/JPS6183383A/ja active Pending

Patent Citations (2)

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