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
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
  • D04H1/64—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
  • D04H1/645—Impregnation followed by a solidification process
• • 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
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
  • D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
  • D04H1/48—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation
  • D04H1/488—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres in combination with at least one other method of consolidation in combination with bonding agents
• • 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
  • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
  • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
  • D04H1/58—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
  • D04H1/587—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives characterised by the bonding agents used
• • 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
  • D04H13/00—Other non-woven fabrics
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F7/00—Other details of machines for making continuous webs of paper
  • D21F7/08—Felts
• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
  • D21F7/00—Other details of machines for making continuous webs of paper
  • D21F7/08—Felts
  • D21F7/083—Multi-layer felts
• • 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
  • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
  • Y10T442/20—Coated or impregnated woven, knit, or nonwoven fabric which is not [a] associated with another preformed layer or fiber layer or, [b] with respect to woven and knit, characterized, respectively, by a particular or differential weave or knit, wherein the coating or impregnation is neither a foamed material nor a free metal or alloy layer
  • Y10T442/2484—Coating or impregnation is water absorbency-increasing or hydrophilicity-increasing or hydrophilicity-imparting

Definitions

• felts especially papermakers felts, have been made by securing textile fibers to woven base fabrics by means of felting needles.
• Such felting needles make it possible to needle thick naps onto relatively light-base fabrics or on synthetic fibers blended with natural fibers.
• the thus obtained attachment or anchoring of the nap in the base fabric is not firm enough for paperrnakers felts.
• the entanglement of the fibers produced by the needling and the adhesion of the fibers needled through the threads of the base fabric is mostly insufficient for practical applications.
• the surface layer becomes detached from the base fabric after short operations, or the loss of fibers is so great as to produce markings.
• Procedures have been developed in order to fasten the needled fibers still more firmly in the base fabric or to improve their strength and cohesion by interfiber entanglement, e.g., by incorporating into the nap to be needled a certain amount of fibers which on heating with steam or in boiling in water undergo strong shrinkage and thereby densifies the felt; however, this procedure is expensive and cannot be always applied.
• felt fabric which may be needled, is coated at its underside with a water insoluble elastic adhesive layer of even thickness; subsequently the coated felt is compressed and then treated on the coated surface with a strong jet of compressed air.
• films or membranes which may have been formed by the adhesive which still contains the solvent, are broken up, and the adhesive is distributed in the felt in such a way that, after releasing the compression pressure and after the treatment with the compressed air, adhesive remains only on the individual fibers and particularly at their 3,463,657 Patented Aug. 26, 1969 points of contact without penetrating to the upper side of the felt fabric.
• the adhesive may be applied to the underside of the felt by any conventional method, e.g., by spraying, by a doctor blade, or by running the felt. over or between applicator rolls.
• the mechanical compression of the felt is than also carried out in any suitable manner, e.g., by means of two rollers rotating in opposite directions.
• compressed air of slightly elevated temperature may be employed.
• the felt may be subjected again to a compression treatment, for instance by means of two rollers, in order to bind the adhesively coated fibers at additional points of contact.
• a needled papermakers felt is compressed between two vertically superposed metal rollers, the lower one of which carries an adhesive layer of a water-insoluble elastic adhesive such as butadiene-acrylonitrile or 2-chlorobutadiene, kept at a constant thickness by means of a doctor; since the rollers compress the felt, the adhesive penetrates its lower layers and envelops the fibers.
• a water-insoluble elastic adhesive such as butadiene-acrylonitrile or 2-chlorobutadiene
• a method of improving the properties of papermakers felt comprising applying a coating of uniform thickness of a water-insoluble adhesive elastomer solution to the underside only of the felt, compressing the felt, and treating the adhesively coated underside of the felt with a jet of compressed air to break films of the adhesive elastomer between fibers of the felt and leave the adhesive elastomer at the underside of the felt only on individual fibers and at points of contact of the fibers.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Dispersion Chemistry (AREA)
• General Chemical & Material Sciences (AREA)
• Mechanical Engineering (AREA)
• Paper (AREA)
• Filtering Materials (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7100418

Family Applications (1)

Country Status (9)

Cited By (2)

Families Citing this family (1)

Citations (3)

Family Cites Families (3)

• 1965
  • 1965-02-17 DE DE1965F0045272 patent/DE1660769B1/de active Pending
  • 1965-10-04 NO NO15993665A patent/NO135431C/no unknown
  • 1965-10-18 AT AT938265A patent/AT267205B/de active
  • 1965-10-27 US US3463657D patent/US3463657A/en not_active Expired - Lifetime
  • 1965-10-30 FI FI259965A patent/FI45569C/fi active
  • 1965-11-02 GB GB4636265A patent/GB1094584A/en not_active Expired
• 1966
  • 1966-01-06 CH CH15966A patent/CH435770A/de unknown
  • 1966-02-08 NL NL6601603A patent/NL6601603A/xx unknown
  • 1966-02-16 BE BE676606D patent/BE676606A/xx unknown

Patent Citations (3)

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