US3676243A - Process for the production of fleeces - Google Patents

Process for the production of fleeces Download PDF

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Publication number
US3676243A
US3676243A US90678A US3676243DA US3676243A US 3676243 A US3676243 A US 3676243A US 90678 A US90678 A US 90678A US 3676243D A US3676243D A US 3676243DA US 3676243 A US3676243 A US 3676243A
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US
United States
Prior art keywords
threads
series
fleece
fleeces
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US90678A
Other languages
English (en)
Inventor
Franz Sasshofer
Johannes Krassig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lenzing AG
Original Assignee
Chemiefaser Lenzing AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chemiefaser Lenzing AG filed Critical Chemiefaser Lenzing AG
Application granted granted Critical
Publication of US3676243A publication Critical patent/US3676243A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • D04H13/00—Other non-woven fabrics
    • D04H13/02—Production of non-woven fabrics by partial defibrillation of oriented thermoplastics films
    • 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
    • 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
    • D04H3/10—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 bonds between yarns or filaments made mechanically
    • D04H3/105—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 bonds between yarns or filaments made mechanically by 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
    • 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
    • D04H3/08—Non-woven fabrics formed wholly or mainly of yarns or like filamentary material of substantial length characterised by the method of strengthening or consolidating
    • D04H3/14—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 bonds between thermoplastic yarns or filaments produced by welding
    • 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
    • Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
    • Y10T156/10—Methods of surface bonding and/or assembly therefor
    • Y10T156/1052—Methods of surface bonding and/or assembly therefor with cutting, punching, tearing or severing
    • Y10T156/1062—Prior to assembly
    • Y10T156/1067—Continuous longitudinal slitting

Definitions

  • the invention relates to a process for the production of fleeces, in which threads are deposited on a perforated, moving support which is subjected to suction, and the fleece so produced is compacted mechanically, thermally or by glueing.
  • the improvement resides in that the threads are guided to the support as a series of threads arranged in one plane and parallel to each other, said series being obtained by cutting a polymer foil and simultaneously stretching the threads while they are being made.
  • each individual thread may form a loop so that a highly dense, uniformly tangled arrangement is obtained.
  • the invention relates to a process for the production of fleeces in which threads are deposited on a perforated, moving support which is subjected to suction, such as a screening drum or a screening ribbon, and the fleece so produced is mechanically, thermaly or by glueing com pacted.
  • the known processes for producing fleeces usually start from spinning threads.
  • a known method e.g. resides in that the threads are drawn from the spinning nozzles by means of pneumatic devices and transported to the perforated, moving support, whereupon they are further treated by subjecting them to heat and pressure, by the addition of adhesives or by needling. It is also known to spread bundles of threads by subjecting them to piercing air rays and by means of devices for electrostatically charging the threads before they are brought to the perforated support. A great amount of air is needed for the pneumatic transportation equipment and its useful effect is unsatisfactory. Threads drawn off by means of pneumatic devices usually have a relatively low tensile strength and a high elongation at rupture.
  • the invention is aimed at avoiding these disadvantages and, in a process of the kind defined in the introductory part, resides in that the threads are guided to the support as a series of threads arranged in one plane and parallel to each other, said series being obtained from cutting a polymer foil and simultaneously stretching the threads while they are being made.
  • the polymer foil used may advantageously be one made of polyethylene, polypropylene, polyester, polyamide, polyacrylonitrile, polytetrafluoroethylene or polyvinylchloride.
  • the series of threads thus formed may be guided to the moving support by means of a pair of rolls.
  • the process according to the invention differs from the known processes mainly in that the threads are guided to the moving support, not in the form of more or less tangled thread bundles, but as a closed thread curtain in which the threads are lying parallel to each other in one plane and closely side by side.
  • Each individual thread which touches the support which is subjected to suction forms loops and deposits in this form so that a much more effective and, above all, a much denser, more uniformly tangled or disoriented arrangement is obtained than is the case with known processes in which thread bundles which are not as movable as single threads hit upon the support.
  • the fleece is further processed in known manner, compacted and coiled up.
  • Compaction may be achieved by a consolidating measure such as thermal treatment under pressure in which case the threads of the series of threads may be composed of two or more different polymers, of which one has a lower softening point than the other(s).
  • a consolidating measure such as thermal treatment under pressure
  • Such a series of threads may be cut from a polymer foil which was produced by coextrusion of two or more different polymers over a special nozzle forming a twolayer or multi-layer foil.
  • the threads of the series of threads may also be composed of mixed polymers.
  • Such threads are produced by mixing two or more polymers in granular form in the extruder and cutting the thus produced foil into threads. In this case the polymers are present in each thread in statistical distribution. Thus the softening interval, in which welding is possible, is extended.
  • the fleece may furthermore be mechanically compacted by needling on a needle machine and, finally, also by the addition of adhesives.
  • the threads of the series of threads which are guided to the support prior to the formation of the fleeces; according to a further possibility the threads may be crimped in the fleece before its thermal or mechanical compaction.
  • Such fleeces with crimped threads have advantageous properties, e.g. increased pufliness.
  • FIG. 1 denotes a foil roll from which by means of transportation rolls 2 the foil 3 is drawn OE and guided over tension pins 4 which are movable in vertical and horizontal direction and are, if desired, heated.
  • the foil 3 is guided from the pins 4 over the slitting machine 5 whence the series of threads thus being made is drawn oflr by the three-high stand 6 under stretching tension.
  • the series of threads may be guided over a heating device 6' for further stretching or crimping whereupon it is drawn off by the pair of rolls 7.
  • This pair of rolls is designed as a so-called blowing two-high stand, i.e.
  • the hollow rolls are provided with perforations or longitudinal slits through which, from the sectors 7 which are stationarily arranged within the rolls, air is blown onto the series of threads.
  • the thread curtain is transported to the screening drum 8 in the interior of which a suction sector 8' is provided.
  • a crimping device e.g. a hot air shaft, may be interposed.
  • the series of threads is deposited on the screening drum under formation of loops or nooses of each individual thread and thus the fleece is formed which is compacted by means of the heated roll 9.
  • This roll may be perforated and hot air or steam which gets into contact with the fleece may be guided through it.
  • the fleece is transported into a heated chamber 11 by means of a transport ribbon 10.
  • the fleece runs between a screening drum 12 and a tightened screening ribbon 13 pressed onto said drum and is penetrated by a hot gaseous or steam medium leaving the sector 12' through the openings of the screening drum 12 so that the final compaction is obtained.
  • the fleece is coiled up on a coiling device 14.
  • a process for the production of fleeces comprising depositing threads on a perforated, moving support which is subjected to suction and compacting the fleece so produced, the threads being guided to the support in a series arranged in one plane and parallel to each other, said series being obtained by cutting a polymer foil and simultaneously stretching the threads while they are being made.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Nonwoven Fabrics (AREA)
US90678A 1969-11-21 1970-11-18 Process for the production of fleeces Expired - Lifetime US3676243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT1087569 1969-11-21

Publications (1)

Publication Number Publication Date
US3676243A true US3676243A (en) 1972-07-11

Family

ID=3625292

Family Applications (1)

Application Number Title Priority Date Filing Date
US90678A Expired - Lifetime US3676243A (en) 1969-11-21 1970-11-18 Process for the production of fleeces

Country Status (5)

Country Link
US (1) US3676243A (fr)
CH (1) CH529248A (fr)
DE (1) DE2057164A1 (fr)
FR (1) FR2068572B3 (fr)
GB (1) GB1326772A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878014A (en) * 1973-04-30 1975-04-15 Beloit Corp Process for matting melt blow microfibers
US4025598A (en) * 1975-01-03 1977-05-24 Chemigfaser Lenzing Aktiengesellschaft Method of producing threads or fibers of synthetic materials

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6436135B1 (en) 1974-10-24 2002-08-20 David Goldfarb Prosthetic vascular graft

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3878014A (en) * 1973-04-30 1975-04-15 Beloit Corp Process for matting melt blow microfibers
US4025598A (en) * 1975-01-03 1977-05-24 Chemigfaser Lenzing Aktiengesellschaft Method of producing threads or fibers of synthetic materials

Also Published As

Publication number Publication date
FR2068572A7 (fr) 1971-08-27
FR2068572B3 (fr) 1973-08-10
CH529248A (de) 1972-10-15
DE2057164A1 (de) 1971-06-09
GB1326772A (en) 1973-08-15

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