EP0105731B1 - Consolidation d'une nappe de fibres contenant des fibres thermoplastiques entre deux courroies, sur des cylindres chauffés à la vapeur - Google Patents

Consolidation d'une nappe de fibres contenant des fibres thermoplastiques entre deux courroies, sur des cylindres chauffés à la vapeur Download PDF

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Publication number
EP0105731B1
EP0105731B1 EP83305893A EP83305893A EP0105731B1 EP 0105731 B1 EP0105731 B1 EP 0105731B1 EP 83305893 A EP83305893 A EP 83305893A EP 83305893 A EP83305893 A EP 83305893A EP 0105731 B1 EP0105731 B1 EP 0105731B1
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EP
European Patent Office
Prior art keywords
web
belt
heated
rolls
around
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
Application number
EP83305893A
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German (de)
English (en)
Other versions
EP0105731A3 (en
EP0105731A2 (fr
Inventor
Alfred T. Mays
Nicholas Wereson
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.)
Chicopee LLC
Original Assignee
Chicopee LLC
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Filing date
Publication date
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Publication of EP0105731A3 publication Critical patent/EP0105731A3/en
Application granted granted Critical
Publication of EP0105731B1 publication Critical patent/EP0105731B1/fr
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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
    • 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
    • D04H1/54—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 welding together the fibres, e.g. by partially melting or dissolving

Definitions

  • U.S. Pat. No. 3,671,365 to Cover Jr., et al. discloses an apparatus for compressing and cooling a fibrous web.
  • the fibrous web is fed between an upper series and a lower series of rollers comprising the compression frame.
  • a carrier belt is mounted about each of the upper and lower series of rollers.
  • U.S. Pat. No. 3,442,740 to David discloses a process and apparatus which comprises a modification of the palmer dryer and method used to dry and heat fibrous webs.
  • the palmer dryer comprises a heated roll and a flexible endless belt which travels around the roll.
  • a web is fed between the belt and the roll, and travels about the roll while under the belt.
  • the web is doffed from the heating roll and travels around another cooling roll or drum.
  • the fibrous web is maintained between two belts as the belts travel about spaced heated cans and optionally thereafter spaced cooling cans.
  • FR-A-1059617 describes a process for making paper-like materials from thermoplastic fibres.
  • a web of fibres laminated between carrier belts is conducted around heating rolls such that the web is heated first from one side, then the other.
  • pressure is applied on the two belt laminate by pressure rolls.
  • the belts are such that pressure is distributed over the web in punctiform manner.
  • the present invention comprises a method and apparatus for producing a fabric from a fibrous web comprising at least 5 percent thermoplastic fibers.
  • thermoplastic fibres' encompasses such conjugate fibers.
  • Low shrink thermoplastic fibers may be used, or alternatively, tension may be applied to the web through the belts to prevent substantial shrinkage of the web.
  • the fibers may be cooled by passing the web and two belts about spaced cooling cans.
  • the thermoplastic fibrous material formed by the apparatus and method of the present invention have excellent cross directional strength.
  • the Figure is a schematic side view of the method according to the present invention.
  • the present invention utilizes a series of spaced heated rolls, such as the steam cans currently used to bond and heat set fibrous webs, in a new and unique process for producing a fabric containing thermoplastic fibers.
  • the heated rolls or steam cans depicted at 1 in Figure 1 are rotatably mounted to a frame (not shown). The rolls or cans are spaced from each other, and in no way provide a compression nip.
  • a first endless carrier belt 3, is wound about means 5, for causing said first belt to travel in a serpentine path about the rolls.
  • a second endless carrier belt 7, is wound about means 9, for causing the second belt to travel along an initial path 11, spaced from said first belt, and then " along said serpentine path about the rolls.
  • Means 5' may be adjusted to impart different degrees of tension to the belts, lower tension yielding higher bulk fabrics and higher tension giving rise to less shrinkage.
  • First and second carrier belts may be formed of, for example, polyester, stainless steel, teflon coated fiberglass, teflon, or bronze.
  • the belts may vary in construction from, e.g., a 40 x 40 mesh to a substantially non-porous configuration.
  • the belts preferably have good release properties, e.g., the teflon and teflon coated fiberglass belts. Another useful property in the belt is good heat transmission as exhibited by belts of bronze and stainless steel.
  • a web 13 comprising, e.g., low shrink thermoplastic fibers may be superimposed on said first carrier belt and the second carrier belt is superimposed on said web forming a two belt laminate 15 just prior to or as the belts begin to travel about the rolls.
  • the rolls which may be heated by any suitable means, melt and fuse the thermoplastic fibers to fibers in the web.
  • the fibrous web is maintained between the two belts as it is removed from the last in the series of rolls and is maintained between the belts until the web cools.
  • the belts may be passed around at least one cooling roll as shown in Figure 1 at 17.
  • the cooling rolls are also spaced and in no way comprise a compression nip.
  • the present method and apparatus may utilize existing steam cans as the heated rolls used to fuse the low shrink thermoplastic fibers to form a fibrous material.
  • the method avoids the loss in cross directional strength due to drafting as a web is removed from a roll on one carrier belt.
  • the use of two belts prevents sticking of the heated thermoplastic fibers of the web to the rolls and permits rapid handling of the web while heated, including immediately passing the web about cooling rolls.
  • Low shrink thermoplastic monofils such as Eastman 4BC crystalline copolyester fibers may be used in the present invention, however, sheath/core polyethylene/ polyester conjugate fibers are preferred.
  • the conjugate fibers may be eccentric, symmetrical sheath/core or side by side by side. Polyethylene/ polypropylene conjugate fibers may also be used. In all cases, means 5' may be used to adjust the tension and reduce shrinkage.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Nonwoven Fabrics (AREA)
  • Laminated Bodies (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Manufacturing Of Multi-Layer Textile Fabrics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Claims (5)

1. Procédé de production d'un textile non tissé soudé comprenant des fibres thermoplastiques, qui comporte:
(a) la superposition d'une nappe comprenant au moins 5% de fibres thermoplastiques sur une première courroie porteuse sans fin;
(b) la superposition d'une seconde courroie porteuse sur ladite nappe pour former un lamifié de deux courroies, avec ladite nappe prise en sandwich entre la première et la deuxième courroies porteuses sans fin;
(c) la mise en circulation du lamifié des deux courroies sur un trajet conduisant successivement autour d'un premier et d'un second cylindres chauffés, qui sont désaxés l'un par rapport à l'autre et écartés d'une distance suffisante pour éviter un pincement par compression entre lesdits premier et second cylindres, les surfaces périphériques desdits premier et second cylindres chauffés coopérant pour délimiter une portion dudit trajet où passe le lamifié des deux courroies, sans contact avec lesdits premier et second cylindres chauffés de façon à apporter de la chaleur, au début à une première face de ladite nappe, quand ledit lamifié de deux courroies passe autour du premier cylindre chauffé et de façon à souder ainsi les fibres thermoplastiques aux fibres adjacentes de cette face, puis de façon à apporter de la chaleur à la deuxième face de ladite nappe, quand ledit lamifié de deux courroies passe autour du deuxième cylindre chauffé et de façon à souder ainsi les fibres thermoplastiques aux fibres adjacentes de sa deuxième face; et
(d) le refroidissement du lamifié des deux courroies après son passage autour du premier et du deuxième cylindres chauffés, de manière à refroidir les fibres de la nappe prise en sandwich entre la première et la deuxième courroie porteuse sans fin.
2. Procédé selon la revendication 1, dans lequel les fibres thermoplastiques sont des fibres complexes.
3. Procédé selon la revendication 2, dans lequel les fibres complexes sont des fibres gaine/coeur en polyéthylène/polyester.
4. Appareil de production d'un textile non tissé soudé comprenant des fibres thermoplastiques, cet appareil comportant:
(a) un châssis;
(b) un premier et second cylindres montés sur le cadre de manière à pouvoir tourner, désaxés l'un par rapport à l'autre, lesdits cylindres étant suffisamment écartés pour éviter un pincement de compression entre lesdits premier et second cylindres;
(c) une première courroie porteuse sans fin, montée sur ledit châssis, pour circuler sur un trajet passant consécutivement autour desdits premier et second cylindres chauffés;
(d) une seconde courroie porteuse sans fin, montée sur ledit châssis pour circuler le long dudit trajet autour desdits premier et second cylindres chauffés, de manière adjacente à ladite première courroie;
(e) des moyens pour superposer une nappe de fibres sur ladite première courroie de sorte que lesdites première et seconde courroies forment un lamifié avec la nappe prise en sandwich entre elles, ledit chemin étant tel que pendant le fonctionnement, le lamifié constitué de deux courroies circule sur ledit trajet, successivement autour dudit premier cylindre chauffé pour chauffer d'abord une première face de la nappe et ensuite autour dudit second cylindre chauffé pour chauffer la seconde face de ladite nappe;
(f) les surfaces périphériques desdits premier et second cylindres chauffés coopèrent pour délimiter une portion dudit trajet dans lequel le lamifié constitué de deux courroies circule sans contact avec lesdits premier et second cylindres chauffés; et
(g) des moyens de refroidir ledit lamifié constitué des deux courroies, après qu'il soit passé autour desdits premier et second cylindres chauffés pour refroidir les fibres de la nappe prise en sandwich entre la première et la deuxième courroies porteuses sans fin.
5. Appareil selon la revendication 4, dans lequel lesdits moyens de refroidissement comprennent au moins un cylindre refroidi.
EP83305893A 1982-09-30 1983-09-29 Consolidation d'une nappe de fibres contenant des fibres thermoplastiques entre deux courroies, sur des cylindres chauffés à la vapeur Expired EP0105731B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US43030882A 1982-09-30 1982-09-30
US430308 1989-11-01

Publications (3)

Publication Number Publication Date
EP0105731A2 EP0105731A2 (fr) 1984-04-18
EP0105731A3 EP0105731A3 (en) 1987-01-28
EP0105731B1 true EP0105731B1 (fr) 1989-08-09

Family

ID=23706966

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83305893A Expired EP0105731B1 (fr) 1982-09-30 1983-09-29 Consolidation d'une nappe de fibres contenant des fibres thermoplastiques entre deux courroies, sur des cylindres chauffés à la vapeur

Country Status (10)

Country Link
EP (1) EP0105731B1 (fr)
AU (1) AU573539B2 (fr)
BR (1) BR8305369A (fr)
DE (1) DE3380360D1 (fr)
DK (1) DK449383A (fr)
ES (1) ES526135A0 (fr)
IE (1) IE55026B1 (fr)
NZ (1) NZ205682A (fr)
PT (1) PT77419B (fr)
ZA (1) ZA837299B (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE512462A (fr) * 1952-06-10
GB1237603A (en) * 1968-02-14 1971-06-30 Vepa Ag Process and device for strengthening felts and other non-woven fabrics
GB1550955A (en) * 1975-12-29 1979-08-22 Johnson & Johnson Textile fabric and method of manufacturing the same

Also Published As

Publication number Publication date
IE55026B1 (en) 1990-04-25
ES8502493A1 (es) 1985-01-01
AU1975983A (en) 1984-04-05
NZ205682A (en) 1987-03-31
AU573539B2 (en) 1988-06-16
IE832313L (en) 1984-03-30
EP0105731A3 (en) 1987-01-28
DK449383A (da) 1984-03-31
DK449383D0 (da) 1983-09-29
PT77419A (en) 1983-10-01
ES526135A0 (es) 1985-01-01
PT77419B (en) 1986-03-20
BR8305369A (pt) 1984-05-08
DE3380360D1 (en) 1989-09-14
EP0105731A2 (fr) 1984-04-18
ZA837299B (en) 1985-05-29

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