EP2791404A1 - Tissu étirable et de dimension stable fabriqué à partir de filés à âme à base de poly(téréphtalate de triméthylène) - Google Patents

Tissu étirable et de dimension stable fabriqué à partir de filés à âme à base de poly(téréphtalate de triméthylène)

Info

Publication number
EP2791404A1
EP2791404A1 EP12809933.0A EP12809933A EP2791404A1 EP 2791404 A1 EP2791404 A1 EP 2791404A1 EP 12809933 A EP12809933 A EP 12809933A EP 2791404 A1 EP2791404 A1 EP 2791404A1
Authority
EP
European Patent Office
Prior art keywords
fabric
yarn
core spun
core
fiber
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.)
Granted
Application number
EP12809933.0A
Other languages
German (de)
English (en)
Other versions
EP2791404B1 (fr
Inventor
Akshay Kumar
Gowri NAGARAJAN
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of EP2791404A1 publication Critical patent/EP2791404A1/fr
Application granted granted Critical
Publication of EP2791404B1 publication Critical patent/EP2791404B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/36—Cored or coated yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/283—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads synthetic polymer-based, e.g. polyamide or polyester fibres
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
    • D01D5/30—Conjugate filaments; Spinnerette packs therefor
    • D01D5/34—Core-skin structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
    • D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
    • D02G3/32—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic
    • D02G3/328—Elastic yarns or threads ; Production of plied or cored yarns, one of which is elastic containing elastane
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/20—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads
    • D03D15/208—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based
    • D03D15/217—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the material of the fibres or filaments constituting the yarns or threads cellulose-based natural from plants, e.g. cotton
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/44—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads with specific cross-section or surface shape
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/40—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads
    • D03D15/47—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the structure of the yarns or threads multicomponent, e.g. blended yarns or threads
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D03D15/50—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads
    • D03D15/56—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used characterised by the properties of the yarns or threads elastic
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/01—Natural vegetable fibres
    • D10B2201/02—Cotton
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/20—Cellulose-derived artificial fibres
    • D10B2201/22—Cellulose-derived artificial fibres made from cellulose solutions
    • D10B2201/24—Viscose
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/02—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyamides
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
    • D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2401/00—Physical properties
    • D10B2401/06—Load-responsive characteristics
    • D10B2401/061—Load-responsive characteristics elastic
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2501/00—Wearing apparel
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2503/00—Domestic or personal
    • D10B2503/06—Bed linen
    • D10B2503/062—Fitted bedsheets
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2505/00—Industrial
    • D10B2505/08—Upholstery, mattresses
    • 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
    • Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
    • Y10T428/2904—Staple length fiber
    • 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.]
    • Y10T442/30—Woven fabric [i.e., woven strand or strip material]
    • Y10T442/3008—Woven fabric has an elastic quality
    • Y10T442/3024—Including elastic strand or strip

Definitions

  • This invention relates to polytrimethylene terephthalate (PTT) based core spun yarns, wherein the core of the yarn comprises a stretchable filament and the sheath comprises polytrimethylene terephthalate based staple fiber.
  • PTT polytrimethylene terephthalate
  • This invention further relates to highly stretchable fabrics that exhibit high recovery and low growth, wherein the PTT based core spun yarn is in the weft direction.
  • CSY Core spun yarns
  • PET polyethylene terephthalate
  • the CSY garments have stretch level ranging from 7 to 35% depending upon the percentage of spandex in the core.
  • the fabric manufactured with stretch level 8 to 15 % is called a comfort stretch fabric.
  • the fabric with stretch level 16 to 35 % is called as super stretch fabric.
  • a fabric with a stretch level of 35% has a high spandex percentage (about 9 to 10%). This leads to high growth % or low recovery potential which is undesirable.
  • a fabric with almost 15 % stretch level has almost 5 % growth and only 70 % recovery level. This causes baggy formation and dimensional instability in the final garment after some usage.
  • WO 2008130563 discloses elastic composite yarn used as warp and filling yarn for woven fabric comprising a filamentary core comprising elastic performance filament(s) and inelastic control filament(s), and a fibrous sheath comprising spun staple fibers.
  • a core spun yarn comprising a core comprising a stretchable filament surrounded by a sheath comprising a polytrimethylene terephthalate based staple fiber in combination with a second staple fiber.
  • a fabric comprising the core spun yarn described hereinabove.
  • Figure 1 is a schematic representation of core spun yarn production.
  • Figure 2 is a schematic representation of fabric (denim) production using core spun yarn.
  • a fabric made of a core spun yarn is described herein. Also described is the CSY which comprises polytrimethylene terephthalate based staple fibers.
  • a CSY is a yarn that consists of an inner core yarn surrounded by staple fibers. The surrounding staple fibers thus form the sheath of the CSY.
  • a core spun yarn combines the strength and/or elongation of the core thread and the characteristics of the staple fiber sheath which form the surface.
  • the fabric is a stretchable, dimensionally stable woven fabric that is comfortable to wear, has high stretch properties coupled with good stretch recovery and less growth.
  • the fabric in addition to above features, also addresses practical aspects of growth in highly stretchable, heavy fabrics like denims, bottom fabrics, and suiting fabrics.
  • polytrimethylene terephthalate As used herein the terms “polytrimethylene terephthalate” or “PTT” are used interchangeably.
  • the polytrimethylene terephthalate is bio-sourced, bio-based or petroleum based.
  • staple fiber refers to a fiber of standardized length unlike a continuous fiber which is known as a filament. Staple fibers are cut to a specific length from the continuous filament fiber. Usually the staple fiber is cut in lengths ranging from 1-1/2 inches to 8 inches long.
  • a core spun yarn has an inner core comprising a stretchable filament and is surrounded by a sheath of polytrimethylene terephthalate staple fibers in combination with a second staple fiber.
  • the stretchable filament may be a spandex filament.
  • Spandex is a
  • polytrimethylene terephthalate based staple fibers refers to 100% polytrimethyelene terephthalate (PTT) staple fibers or PTT in combination with another polymer selected from nylon, styrene, polyethylene terephthalate (PET) or blends thereof staple fibers.
  • PTT based staple fibers are in combination with a second staple fiber selected from: cotton, polyester, viscose, nylon, modal, tencel, wool or combinations thereof.
  • the polytrimethylene terephthalate based staple fibers is in combination with cotton and viscose. These form the sheath of the core spun yarn.
  • the polytrimethylene terephthalate content in the outer sheath is from 10% to 60%, or from 25% to 50%, or from 35% to 40%.
  • the percentage of polytrimethylene terephthalate used in weft yarn of the sheath contributes to the stretch recovery properties in the CSY .
  • a "woven fabric” is used to define a fabric manufactured by interlacing of two sets of yarn called warp yarns (warp) and weft yarns (weft). Warp runs in the fabric in a length- wise direction and weft yarns runs in the fabric in a width-wise direction.
  • the fabrics are woven by the techniques well known in the art such as plain weave, satin weave, and twill weave.
  • the core of the CSY can be a stretchable fiber or filament selected from a group of spandex and Lyrca ® .
  • the stretchable fiber percentage in the yarn was in the range of 2% to 10%, or 5 to 8 %, or 5 to 6%.
  • the sheath comprises a weft yarn being the CSY as described herein, and a warp yarn is a staple fiber yarn selected from cotton, nylon, polyester (for example PET, PTT), wool, viscose, and combinations thereof.
  • stretchable refers to the property of a fabric to extend to a certain length percentage when a fixed amount of load is applied.
  • a fabric with good stretch property is defined by the ability of the fabric to extend to its maximum and recover with a minimum amount of growth left in the fabric, after removal of the applied load.
  • An example of good stretch property in a fabric is approximately 15% stretch.
  • Such fabrics are called “comfort-stretch” fabrics. Stretch property and growth is measured using standard ASTM international procedures (see Table 1).
  • An aspect of the invention is a fabric made up of a core spun yarn wherein the inner core of the core spun yarn comprises a stretchable filament and is surrounded by a sheath of polytrimethylene terephthalate based staple fibers in combination with a second fiber.
  • the fabrics of this invention have high "dimensional stability” which means that they have maximum recovery and minimum growth left in the fabric after the stretch is released.
  • stretch recovery refers to the ability of the fabric to extend to its maximum and recover with minimum amount of growth left in the fabric, after removal of the applied load.
  • An acceptable stretch recovery has more than 70% stretch recovery.
  • a recovery of more than 70% and a growth of less than 2.5% in a fabric make it a dimensionally stable fabric. The stretch recovery and growth properties of the fabrics remain constant throughout the life of the fabric.
  • ASTM refers to American Society for Testing and Materials (ASTM
  • ASTM International West Conshohocken, PA.
  • ASTM International publishes the Annual Book of ASTM Standards each year.
  • the fabric of this invention has stretch recovery in the range of 75 to 95 %, or 80 to 95%.
  • the fabric of this invention has growth of less than 2.5%, or less than 2.3%.
  • the fabrics of this invention have a good wearable feel, provide ultraviolet protection, provide acid and alkali resistance during washing because of the PTT sheath in the core spun yarn of the fabric.
  • the fabric of the invention is selected from plain fabric, denim fabric, bottom fabric, shirt fabric, piece-dyed fabric, printed fabric, checked fabric, and striped fabric.
  • the fabric described herein may be used, for example, in the manufacture of garments, sheeting material like bed sheets, furnishings, or upholstery.
  • An aspect of the invention is the method of manufacturing the core spun yarn wherein, the sheath is a bicomponent fiber comprising PTT and cotton staple fibers, the process comprises the steps of;
  • the steps (a) to (e) apply to cotton staple fiber. After the combing of the cotton staple fiber, the cotton fiber is mixed with the PTT based fiber and are subjected to the process steps (f) to (n) as mentioned above.
  • blow-room process refers to a process where the fiber after opening and mixing is processed in a "blow-room line".
  • a blow-room line consists of a number of machines used in succession to open and clean the cotton fiber. About 40% to 70% trash is removed in the blow-room section.
  • the objects (cotton and PTT staple fibers) of the blow-room are opened followed by cleaning where the fibers are opened from a larger tuft size (in hundreds of grams) to a smaller tuft size (in mgs). This is followed by cleaning which removes dirt, dust, broken seeds, broken leaves, and other unwanted materials from the fiber.
  • Both the processes are accompanied with mixing and blending to make a good quality yarn and to decrease production.
  • lap or fleece formation where the opened and cleaned fiber is transferred into sheet form having definite width and length which is called lap or in a modern system this sheet can be directly feed to the carding machine into fleece form.
  • carding refers to a process of disentangling fiber bunches into individual fibers and arranging them in a parallel direction after individualizing the fiber. It also further eliminates trash and other foreign materials and fibers that are unacceptable for manufacture.
  • the operation is performed on cotton, wool, waste silk, and synthetic staple fibers by a carding machine that consists of a moving conveyor belt with fine wire brushes and a revolving cylinder.
  • the material delivered from the carding machine is called a sliver or a card sliver.
  • the carding process opens up the collected mass of fibers so that the fibers become individual fibers.
  • the fibers in the card sliver are not completely aligned or oriented in the fiber axis. Some fibers lie haphazardly in the sliver.
  • the card sliver is given a minimum of two drafting processes before it goes to the next machine. In this process, the sliver is passed between sets of rollers that are running at different speeds, each succeeding pair rotating faster than the previous so that the fibers are pulled in a lengthwise direction. These two drafting operations can also be achieved by the sliver lap and ribbon lap machines. To improve the uniformity of the sliver, slivers are subjected to a process called doubling.
  • Doubling is the process of combining a number of slivers. By this process, the thin and thick places present in the sliver are evened out.
  • 16-20 card slivers are creeled and passed through the feed table to three pairs of drafting rollers for the drafting operation.
  • the drafted slivers are then taken to two pairs of calender rollers that compress the sliver material.
  • This drafted and compressed sliver material called lap is wound on a spool. This process is known as "lap formation".
  • Combing is an additional fiber alignment operation performed on very fine yarns intended for finer fabrics. (Inexpensive and coarser fabrics are made from slivers processed without this further refining.) Fine-tooth combs are applied to the sliver from combing, separating out the shorter fibers, called noils, and aligning the longer fibers to a higher level of parallelism. The resulting strand is called a comb sliver. With its long fibers, the comb sliver provides a smoother, more even yarn.
  • drawing refers to a process (after carding) where several slivers are combined into one strand that is drawn to be longer and thinner.
  • the sliver that comes out of the carding machine has a high mass/length variation along the length.
  • doubling and drafting processes are carried out in a draw frame machine.
  • the first process of drawing is called a breaker drawing and the second process of drawing is called a finisher drawing.
  • Drawing frames have several pairs of rollers through which the slivers pass.
  • Each successive pair of rollers runs at a higher speed than the preceding pair so that the sliver is pulled longer and thinner as it moves through the drawing frame.
  • the operation is repeated through several stages.
  • the sliver delivered from the finisher draw frame has a minimal mass/length variation and fibers oriented toward the strand axis contribute to tensile properties.
  • the linear density of the sliver is approximately 140 times of the required final yarn. This needs to be further reduced to the required yarn linear density.
  • the fibers need to held to each other in a continuous form and need to have strength so that the fibers can be processed on the next machine.
  • a partial twist in the speed frame machine For imparting the strength to the fiber fleece, it is given a partial twist in the speed frame machine.
  • the whole process of partial drafting and twisting is called roving preparation.
  • the sliver becomes finer, and the resultant product is called the "roving.”
  • the term “yarn spinning” refers to the process of the formation of the final yarn.
  • the core spun yarn has a core of elastomeric fiber and a sheath of staple fibers.
  • Core-spinning is a process by which fibers are twisted around an existing yarn, either filament or staple spun yarn, to produce a sheath- core structure in which the already formed yarn is the core.
  • Core-spun yarns are produced by many spinning systems, for example, ring spinning system, core wrap spinning method, patterned spinning system, core-twin spinning system, composite electrostatic spinning system, rotor spinning system, friction spinning system, or air jet spinning system. These are conventional systems which are well known to a person skilled in the art.
  • An embodiment of this invention is the spinning of a PTT based fiber-cotton sheath using a ring spinning system to produce the core spun fiber as described herein. The process is schematically shown in Figure 1.
  • Ring spinning produces yarn in a small package called cop or bobbin. Since cops from ring frames are not suitable for further processing, the winding process serves to achieve additional objectives made necessary by the requirements of the subsequent processing stages.
  • winding refers to a process of obtaining a larger package from several small ring bobbins. This conversion process provides one with the possibility of cutting out unwanted and problematic objectionable faults. The process of removing such objectionable faults is called as yarn 'clearing'. Finally the yarn needs to be conditioned.
  • conditioning refers to the process to provide an economical device for supplying the necessary moisture in a short time, in order to achieve a lasting improvement in quality and processability of yarn in a subsequent process by reducing the snarling tendency.
  • Moisture in the atmosphere has a great impact on the physical properties of textile fibers and yarns. Relative humidity and temperature will decide the amount of moisture in the atmosphere. High relative humidity in different departments of spinning is not desirable. But on the other hand, a high degree of moisture improves the physical properties of yarn. Moreover, it helps the yarn to attain the standard moisture regain value of the fiber.
  • An aspect of the invention is the method of manufacturing the core spun yarn wherein, the sheath is a blend or combination of PTT and any other staple fiber other than cotton, the process comprises the steps of;
  • An aspect of the invention is the method of manufacturing a denim fabric using the core spun yarn of the invention and indigo dyed cotton staple fiber yarn, wherein the process comprises the steps of;
  • An aspect of the invention is the method of manufacturing a plain bottom- weight fabric using the core spun yarn of the invention and any other staple fiber yarn, wherein the process comprises the steps of: (a) warping;
  • steps of mercerizing are performed prior to the finishing step after the heat setting step for cotton based fabrics;
  • step (k) optionally steps of piece dyeing is performed for piece dyed fabrics.
  • the dyeing step precedes the finishing step.
  • An aspect of the invention of the invention is the method of manufacturing a striped fabric using the core spun yarn of the invention and any other staple fiber yarn, wherein the process comprises the steps of:
  • steps in the manufacturing process can be modified depending on the desired final product. For example, the steps of mercerizing followed by bleaching are done prior to the finishing step only when cotton staple fiber yarns are present in the fabric.
  • the process of dyeing is required only for colored fabrics. It is obvious for someone with skill in the art that the step of dyeing is omitted when a plain fabric is desired.
  • the polytrimethylene terephthalate based core spun yarn forms the weft yarn of the fabric.
  • the term "printed" refers to the fabric which is printed in the fabric form.
  • warping refers to a process of winding the yarns on a warp beam.
  • the term "sizing” used herein refers to a process of coating the threads normally with starch.
  • the term “weaving” used herein refers to a process where the fabric is manufactured on a loom in a weaving process with warp threads coming from weavers beam interlaced with weft yarns put in width wise direction.
  • the term "desizing” used herein refers to a process of removing the sizing applied on the warp with the help of enzyme or any other suitable chemicals.
  • the term “scouring” used herein refers to a process of chemical washing on cotton fabric to remove natural wax and non- fibrous impurities from the fibers and any added soiling or dirt. Scouring is usually carried out in iron vessels called kiers. The fabric is boiled in an alkali, which forms a soap with free fatty acids
  • heat setting is a thermal process taking place mostly in dry heat (160 °C to 180 °C for 30 to 45 s) environment.
  • the effect of the process gives the fabric a dimensional stability and, very often, other desirable attributes like wrinkle resistance or temperature resistance.
  • mercerizing refers to a process of treating the fabric with alkali. This process removes convolutions from a cotton fiber structure and makes it round which improves the hand feel of the fabric, making it more lustrous. In cotton based fabric, mercerizing improves the strength of the fabric as well.
  • Bleaching is normally done by treating the fabric with sodium hypochlorite or hydrogen peroxide solution.
  • the term "dyeing" used herein refers to a process where the fabric after bleaching is dyed with a color.
  • the warp cotton yarn and the weft PTT based yarn are dyed separately by a respective known dyeing method.
  • the warp yarn or PTT based core weft yarn may be dyed separately or together, and patterns are formed accordingly.
  • finishing refers to a process performed to the fabric after weaving to improve the look, performance, or "hand” (feel) of the finished textile or clothing.
  • the different finishing techniques are bio-polishing, raising, fulling, calendaring, anti-microbial finishing, anti-static finishing, non-slip finishing and others known in the art. Suitable finishing agents are used for these finishes.
  • the term "sanforizing” used herein refers to a process of treatment used particularly for cotton fabrics and other textiles made from natural or chemical fibers It is a method of stretching, shrinking and fixing the woven cloth in both length and width, before cutting and producing to reduce the shrinkage which would otherwise occur after washing.
  • the term “yarn dyeing” used herein refers to a process where the yarn in warp and weft need to be dyed. This is done in a high temperature and high pressure dyeing machine.
  • sectional warping refers to a process of winding the yarns on a drum as per color pattern. Once all the yarn patterns are wound on the drum they can be wound to a warper beam to insert in the fabric as per stripe effect needed in the fabric.
  • denim used herein is a rugged cotton twill textile, in which the weft passes under two ("double") or more warp threads. Denim was traditionally colored blue with indigo dyes.
  • indigo dyeing refers to a process of dyeing the cotton warp fibers with indigo dye using standard indigo dyeing processes like indigo rope dyeing process, indigo one-sheet dye slashing, indigo double sheet dyeing etc.
  • sensing refers to a process of burning off loose fibers sticking out of textile goods. Singeing is a part of the pretreatment processes carried out in textile processing, and is usually the first step carried out after weaving.
  • Singeing is often carried out on cotton fabrics, or fabrics with cotton blends and results in increased wettability (better dyeing characteristics, improved reflection, no "frosty” appearance), a smoother surface (better clarity in printing), improved visibility of the fabric structure, less pilling, and decreased contamination through removal of fluff and lint.
  • Singeing usually involves passing/exposing one or both sides of a fabric over a gas flame to burn off the protruding fibers. Other methods of singeing include infra-red singeing and heat singeing for thermoplastic fibers.
  • This example illustrates a process of making core spun yarn using polytrimethylene terephthalate staple fibers and cotton staple fibers.
  • Polytrimethylene terephthalate staple fibers 35 kg, 38 mm fiber length, 1.5 Denier
  • staple cotton (from combed sliver) fibers 65 kg, 31 mm upper quartile mean length, 4.( ⁇ g/inch) were used.
  • the fibers were opened manually, and then mixed together.
  • the fibers were mixed by laying 2 layers of cotton and 1 layers of PTT. This process is called a stack mixing process. Then the entire fiber mass was taken from the stack by vertically withdrawing the material, and fed into a blow-room line.
  • the process parameters of the blow-room line selected for PTT/cotton fiber processing were:
  • the fiber fleece was fed to a carding machine using an aero-pneumatic aero feeding system.
  • the process parameters for the carding machine were:
  • a sliver came out of the carding machine having a very high mass/length variation along the length. To minimize the variation the carding slivers were doubled together and simultaneously drafted six times to further orient the fibers in the resultant sliver along the length direction. The doubling and drafting process was carried out on a draw frame machine. Two such drawing processes were done to reduce the mass/length variation in the sliver to a minimal level, and to orient the fiber along the length direction. The card sliver was processed on two sets of draw frames with the listed parameters.
  • the roving made on the speed frame converts into the yarns by drafting it further along the final spinning machine called a ring frame.
  • the yarn count spun was 9.6s Ne.
  • the denier of core spandex filament was 70 D.
  • Spandex was given a draft of 2.1 before putting it into the yarn.
  • the spandex % in the final yarn was 6.3%.
  • the process parameters of the ring frame were:
  • the yarn was conditioned in an autoclave at 70 °C for 50 min.
  • the yarn cones were directly used as weft in the fabric manufacturing process where stretch in the fabric is required in a widthwise direction. However, these yarns can be used in a lengthwise direction also to get a warp way stretch or bi-stretch fabrics.
  • This example illustrates a process of making denim fabric using core spun yarn obtained from Example 1 as weft.
  • the fabric was manufactured using an airjet weaving machine.
  • the warp was 100% indigo dyed cotton staple fibers.
  • the weft was the core spun yarn obtained from Example 1.
  • the process parameters of the machine were:
  • Warp count (7.2s + 6.4s) Ne (1 + 1), 100 % cotton ring yarn
  • the fabric obtained was singed on a fabric singeing machine by passing over a set of burners at 80 mpm.
  • the protruding fibers on the surface were burnt, therefor removed.
  • the fabric was then desized by padding with enzymes for 12 to 18 hrs.
  • the fabric is then washed with water.
  • the fabric was mercerized by treating it with 18.5% NaOH solution at 65 °C at 40 mpm.
  • the fabric was then dried at 105 °C by passing it through a set of calendar rollers.
  • the fabric was then passed through a sanforizing machine adjusting skew, length and width shrinkage by passing it over a rubber roller in a steam chamber (Monforte) at 50 mpm.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Botany (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Woven Fabrics (AREA)

Abstract

L'invention porte sur un filé à âme, l'âme étant un filament étirable et étant entouré d'une gaine de fibres courtes à base de poly(téréphtalate de triméthylène) en association avec des secondes fibres courtes. L'invention porte également sur un tissu fabriqué à l'aide du filé à âme. Le tissu produit à partir du filé à âme est hautement étirable et a une stabilité dimensionnelle élevée, une faible expansion et une recouvrance élevée.
EP12809933.0A 2011-12-13 2012-12-12 Tissu étirable et de dimension stable fabriqué à partir de filés à âme à base de poly(téréphtalate de triméthylène) Active EP2791404B1 (fr)

Applications Claiming Priority (2)

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IN3626DE2011 2011-12-13
PCT/US2012/069231 WO2013090422A1 (fr) 2011-12-13 2012-12-12 Tissu étirable et de dimension stable fabriqué à partir de filés à âme à base de poly(téréphtalate de triméthylène)

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EP2791404A1 true EP2791404A1 (fr) 2014-10-22
EP2791404B1 EP2791404B1 (fr) 2019-09-18

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CN (1) CN103998662B (fr)
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EP2791404B1 (fr) 2019-09-18
KR20140101851A (ko) 2014-08-20
BR112014014229B1 (pt) 2021-03-23
JP2015504981A (ja) 2015-02-16
CN103998662B (zh) 2017-06-13
WO2013090422A1 (fr) 2013-06-20
CN103998662A (zh) 2014-08-20
US20140308865A1 (en) 2014-10-16
KR102057479B1 (ko) 2020-01-22
JP6338249B2 (ja) 2018-06-06

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