WO2003023105A1 - Warp knitted fabric made of mixed yarns - Google Patents

Warp knitted fabric made of mixed yarns Download PDF

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Publication number
WO2003023105A1
WO2003023105A1 PCT/IB2001/001641 IB0101641W WO03023105A1 WO 2003023105 A1 WO2003023105 A1 WO 2003023105A1 IB 0101641 W IB0101641 W IB 0101641W WO 03023105 A1 WO03023105 A1 WO 03023105A1
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WO
WIPO (PCT)
Prior art keywords
yarn
warp knitted
knitted fabric
fabric according
discontinuous
Prior art date
Application number
PCT/IB2001/001641
Other languages
French (fr)
Inventor
Luigi Pezzoli
Original Assignee
Sitip S.P.A.
Karl Mayer Textilmaschinenfabrik Gmbh
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 Sitip S.P.A., Karl Mayer Textilmaschinenfabrik Gmbh filed Critical Sitip S.P.A.
Priority to PCT/IB2001/001641 priority Critical patent/WO2003023105A1/en
Publication of WO2003023105A1 publication Critical patent/WO2003023105A1/en

Links

Classifications

    • DTEXTILES; PAPER
    • D04BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04BKNITTING
    • D04B21/00Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14Fabrics characterised by the incorporation by knitting, in one or more thread, fleece, or fabric layers, of reinforcing, binding, or decorative threads; Fabrics incorporating small auxiliary elements, e.g. for decorative purposes

Definitions

  • the present invention relates to a warp knitted fabric and, more particularly, to a fabric obtained by using prevailingly a discontinuous yarn.
  • fabrics must have particular characteristics of softness and lightness, together with features of crease-resistant, maintenance easiness and breathing, which are required according to the various applications, for instance, the realization of blankets, clothing items, coverings and the like.
  • such a kind of fabric may be subjected to additional finishing operations to impart said fabric a particular aspect, for instance to obtain a warp knitted fabric of the "pile" type, but without producing pile loops.
  • an object of the present invention is to provide a warp knitted fabric of particularly economical realization.
  • Another object of the present invention is to provide users with a warp knitted fabric particularly with soft handle and having of a pleasant aspect.
  • a further object of the present invention is to provide a warp knitted fabric which maintains in the time the original characteristics, and therefore such as to withstand frequent washings and possibly also such as not to require ironing operations.
  • a warp knitted fabric comprising at least a continuous yarn and at least a
  • discontinuous yarn wherein the discontinuous yarn is at least 50% by weight of the fabric, characterized in that the discontinuous yarn is knitted with the
  • continuous yarn according to at least two different knitting patterns, and is distributed in a substantially equal manner on both sides of the fabric, wherein the continuous yarn is kept in the inside of said fabric.
  • the fabric according to the invention is realized with at
  • yarn are exclusively knitted by at least two full threaded guide bars, and at least a third guide bar for the continuous yarn is interposed between the two distinct guide bars of the discontinuous yarn.
  • the continuous yarn is made
  • the fabric may be heat-fixed, and allows to
  • the fabric is preferably subjected to raising and cutting operations on both sides, in order to obtain a
  • a fabric according to the present invention can maintain, also after repeated finishing operations, a width such as to allow the realization of even double bedspreads or plaid
  • the fabric according to the invention besides being resistant to
  • finishing processes is also particularly versatile as it lends itself easily to both dyeing and printing. It has been found that the fabric according to the invention lends itself easily also to printing operations of the "double-face" type.
  • the fabric is of the kind "plain tricot fabric", realized by means of a process utilizing at least three guide bars.
  • FIG. 1 shows the knitting of the warp knitted fabric obtained according to the patterns shown in Figure 1 ;
  • FIG. 3 shows the path of the threads in the warp knitted fabric.
  • a warp knitted fabric according to the invention comprises two types of
  • yarns namely a continuous yarn F2 which is processed on a knitting machine by a first guide bar (not shown) and a discontinuous yarn F1 and F3 that is processed by distinct guide bars according to at least two different knitting patterns.
  • Each guide bar processes exclusively only one type of yarn.
  • L1 , L2 and L3 are the respective guide bars of yarns F1 , F2 and F3
  • guide bar L1 processes only yarn F1
  • guide bar L2 processes only yarn F2
  • guide bar L3 processes only yarn F3.
  • guide bar L2 is
  • F1 is knitted according to a 10/12 pattern, while the remaining part of the discontinuous yarn, the one indicated by F3, is knitted according to a 10/34 pattern. Instead, the continuous yarn F2 that forms the main width stability and is knitted according to a 33/00 pattern. These patterns create a plain flat fabric and besides ensuring the
  • discontinuous yarn F2 passes through all the loops formed by the discontinuous yarn F3, remaining thereby inserted in the inside of the fabric.
  • the discontinuous yarns F1 and F3 remain therefore distributed in exactly the same manner on both faces of the fabric, in such a way as to realize a warp knitted fabric whose surfaces have nearly the same characteristics on both sides after brushing.
  • the percentage of discontinuous yarn of the fabric is higher than that of the continuous yarn.
  • the discontinuous yarns F1 and F3 account for at least 50% by weight of the fabric.
  • the continuous yarn F2 is made up by a texturized polyester thread that imparts the warp knitted fabric a certain strength.
  • the discontinuous yarns F1 and F3 are made up by polyester staple that imparts the fabric a high softness.
  • the discontinuous yarns F1 and F3 may be obtained with a spinning machine either of the "RING" type or of the "OPEN-END” type. The combination of these yarns allow to obtain a very soft and light warp knitted fabric, which is also heat-fixable in such a way as to realize a stable and particularly washing-fast finished fabric.
  • the warp knitted fabric according to the present invention is realized by at least a discontinuous yarn made of: acetate, polyester staple, polyester, polyester FR (Flame Retardant), cotton, polyamide, viscose, acrylic, acrylic FR (Flame Retardant), modacrylic FR, acrylic outdoor, wool, woolens, polypropylene.
  • Said discontinuous yarn may be taken as a blend of at least two different yarns selected among those above indicated.
  • the warp knitted fabric is realized by at least a continuous yarn made of: acetate, polyester, polyester FR (Flame Retardant), polyamide, viscose, acrylic, acrylic FR (Flame Retardant), modacrylic FR, acrylic outdoor, polypropylene.
  • Said continuous yarn may be blend as a mixture of at least two different yarns selected among those above indicated.
  • the warp knitted fabric according to the invention may be provided with Flame Retardant (FR) properties, either deriving from the Flame Retardant properties of the utilized yarns or from a subsequent Flame Retardant treatment of the yarns or of the row fabric.
  • FR Flame Retardant
  • a warp knitted fabric according to the present invention lends itself easily to withstand several finishing operations, in particular raising and cutting operations, to obtain a fabric of the pile type.
  • the arrangement of the discontinuous yarn in a substantially identical manner on both surfaces allows to realize a warp knitted fabric showing, after the raising operation, the same handle on both surfaces.
  • the lapping construction was realized based on the basis of the knitting schemes of guide bars and related yarns as proposed in the present invention, namely:
  • L1 discontinuous yarn (F1) 10/12;
  • L2 continuous yarn (F2) 33/00;
  • L3 discontinuous yarn (F3) 10/34.
  • the knitting test set up for a 380 cm width with 8 stitches/cm, was carried out at a speed of 1500 revolution/min (rpm), obtaining a daily yield of about 1368 kg/day, equal to 1900 running m/day.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Of Fabric (AREA)

Abstract

A wrap knitted fabric comprises a continuous yarn and at least 50 % by weight of a discontinuous yarn (F2), wherein the discontinuous yarn (F1, F3) is knitted with the continuous yarn in such that the discontinuous yarn (F2) is distributed in a substantially equal manner on both sides of the fabric, maintaining thereby the continuous yarn in the inside of said fabric.

Description

"WARP KNITTED FABRIC MADE OF MIXED YARNS"
Technical Field of the Invention
The present invention relates to a warp knitted fabric and, more particularly, to a fabric obtained by using prevailingly a discontinuous yarn.
Background of the Invention Generally, fabrics must have particular characteristics of softness and lightness, together with features of crease-resistant, maintenance easiness and breathing, which are required according to the various applications, for instance, the realization of blankets, clothing items, coverings and the like.
The international patent application no. WO-98/27255, teaches a machine and a process for the production of a warp knitted fabric having at least 50% by weight of discontinuous yarn.
Thanks to the presence of a high percentage of discontinuous yarn, such a kind of fabric may be subjected to additional finishing operations to impart said fabric a particular aspect, for instance to obtain a warp knitted fabric of the "pile" type, but without producing pile loops.
The task of the present invention is to provide a novel type of warp knitted fabric haying improved characteristics with respect to the fabrics of
the known art.
According to this task, an object of the present invention is to provide a warp knitted fabric of particularly economical realization.
Another object of the present invention is to provide users with a warp knitted fabric particularly with soft handle and having of a pleasant aspect.
A further object of the present invention is to provide a warp knitted fabric which maintains in the time the original characteristics, and therefore such as to withstand frequent washings and possibly also such as not to require ironing operations.
Summary of the Invention
These objects are achieved by the present invention, that relates to a warp knitted fabric comprising at least a continuous yarn and at least a
discontinuous yarn, wherein the discontinuous yarn is at least 50% by weight of the fabric, characterized in that the discontinuous yarn is knitted with the
continuous yarn according to at least two different knitting patterns, and is distributed in a substantially equal manner on both sides of the fabric, wherein the continuous yarn is kept in the inside of said fabric.
In this way a warp knitted fabric is obtained having, besides, high strength characteristics that render the same particularly suitable to withstand repeated finishing operations on both sides, in particular raising and cutting operations, without any fabric deterioration taking place. In particular, the fabric according to the invention is realized with at
least three guide bars. A first part and a second part of the discontinuous
yarn are exclusively knitted by at least two full threaded guide bars, and at least a third guide bar for the continuous yarn is interposed between the two distinct guide bars of the discontinuous yarn.
In a first aspect of the present invention, the continuous yarn is made
up by a thread from texturized polyester that imparts the fabric a particular
strength without weighing it down, while the remaining part is made up by
polyester staple. As a result, the fabric may be heat-fixed, and allows to
obtain a finished fabric having a high washing-fastness. In a second aspect of the present invention, the fabric is preferably subjected to raising and cutting operations on both sides, in order to obtain a
high-quality warp knitted fabric of the "pile" type, having in particular a pleasant softness for the handle together with breathing. These
characteristics cause it to be particularly suitable for the realization of
bedspreads, plaid blankets, clothing items, linen and the like.
In particular, it has also been found that a fabric according to the present invention can maintain, also after repeated finishing operations, a width such as to allow the realization of even double bedspreads or plaid
blankets, without having to join two pieces of fabric.
The fabric according to the invention, besides being resistant to
finishing processes, is also particularly versatile as it lends itself easily to both dyeing and printing. It has been found that the fabric according to the invention lends itself easily also to printing operations of the "double-face" type.
Always according to the present invention, the fabric is of the kind "plain tricot fabric", realized by means of a process utilizing at least three guide bars.
Brief Description of the Drawings
Further characteristics and advantages of the invention will be more
apparent thanks to the following description wherein reference is made to the
attached schematic drawings, wherein:
- Figure 1 shows the knitting pattern of the guide bars and the related yarns
of the warp knitted fabric according to the invention; - Figure 2 shows the knitting of the warp knitted fabric obtained according to the patterns shown in Figure 1 ; and
- Figure 3 shows the path of the threads in the warp knitted fabric.
Modes for Carrying Out the Invention
A warp knitted fabric according to the invention comprises two types of
yarns, namely a continuous yarn F2 which is processed on a knitting machine by a first guide bar (not shown) and a discontinuous yarn F1 and F3 that is processed by distinct guide bars according to at least two different knitting patterns.
Each guide bar processes exclusively only one type of yarn. In other words, if L1 , L2 and L3 are the respective guide bars of yarns F1 , F2 and F3, guide bar L1 processes only yarn F1 , guide bar L2 processes only yarn F2 and guide bar L3 processes only yarn F3. Besides, guide bar L2 is
interposed between guide bars L1 and L3. More particularly, with reference to Figure 1 , the discontinuous yarn
F1 is knitted according to a 10/12 pattern, while the remaining part of the discontinuous yarn, the one indicated by F3, is knitted according to a 10/34 pattern. Instead, the continuous yarn F2 that forms the main width stability and is knitted according to a 33/00 pattern. These patterns create a plain flat fabric and besides ensuring the
strength of the fabric, allow to work at high speed, without any difficulty
coming up, obtaining in this way a high yield.
The knitting obtained with the various yarns F1 , F2 and F3 is shown in
Figure 2, wherein the same graphical structure as Fig. 1 has been adopted, wherein yarn F1 is represented by a very thin line, yarn F2 is represented by a very thick line, and yarn F3 is represented by a line having an intermediate thickness with respect to the two first ones.
The path of the yarns in the fabric is schematically represented in Figure 3, wherein the continuous yarn F2 has been represented by a continuous line, while yarns F1 and F3 are represented by a broken line and a dash-and-dot line respectively.
It is worth to point out that continuous yarn F2 passes through all the loops formed by the discontinuous yarn F3, remaining thereby inserted in the inside of the fabric. The discontinuous yarns F1 and F3 remain therefore distributed in exactly the same manner on both faces of the fabric, in such a way as to realize a warp knitted fabric whose surfaces have nearly the same characteristics on both sides after brushing.
According to an aspect of the present invention, the percentage of discontinuous yarn of the fabric is higher than that of the continuous yarn.
Therefore, the discontinuous yarns F1 and F3 account for at least 50% by weight of the fabric.
According to a possible embodiment of the present invention, the continuous yarn F2 is made up by a texturized polyester thread that imparts the warp knitted fabric a certain strength. On the contrary, the discontinuous yarns F1 and F3 are made up by polyester staple that imparts the fabric a high softness. The discontinuous yarns F1 and F3 may be obtained with a spinning machine either of the "RING" type or of the "OPEN-END" type. The combination of these yarns allow to obtain a very soft and light warp knitted fabric, which is also heat-fixable in such a way as to realize a stable and particularly washing-fast finished fabric.
The warp knitted fabric according to the present invention is realized by at least a discontinuous yarn made of: acetate, polyester staple, polyester, polyester FR (Flame Retardant), cotton, polyamide, viscose, acrylic, acrylic FR (Flame Retardant), modacrylic FR, acrylic outdoor, wool, woolens, polypropylene. Said discontinuous yarn may be taken as a blend of at least two different yarns selected among those above indicated. The warp knitted fabric is realized by at least a continuous yarn made of: acetate, polyester, polyester FR (Flame Retardant), polyamide, viscose, acrylic, acrylic FR (Flame Retardant), modacrylic FR, acrylic outdoor, polypropylene.
Said continuous yarn may be blend as a mixture of at least two different yarns selected among those above indicated.
However also other combinations of continuous and discontinuous yarns can be used, always with a high percentage of discontinuous yarns, according to the characteristics desired for the finished fabric. The warp knitted fabric according to the invention may be provided with Flame Retardant (FR) properties, either deriving from the Flame Retardant properties of the utilized yarns or from a subsequent Flame Retardant treatment of the yarns or of the row fabric. A warp knitted fabric according to the present invention lends itself easily to withstand several finishing operations, in particular raising and cutting operations, to obtain a fabric of the pile type.
Besides, the arrangement of the discontinuous yarn in a substantially identical manner on both surfaces allows to realize a warp knitted fabric showing, after the raising operation, the same handle on both surfaces.
It has also been found that the so obtained fabric lends itself well also to dyeing and/or printing operations.
Further characteristics of the present invention are reported in the following example of production of a warp knitted fabric.
EXAMPLE On a knitting machine of the type KS 3 SP, provided with three guide bars (L1 , L2, L3) with a gauge E 20 ( needles per inch) fineness, a fabric was prepared comprising 92.5% by weight of polyester staple with yarn count Ne 30/1 (discontinuous yarn indicated by F1 and F3 in the figures) obtained with a spinning machine of the "RING" type, and 7.5% by weight of polyester continuous filament with yarn count dtex 78/36 (continuous yarn indicated by F2 in the figures), texturized according to the "false twist" technology.
The lapping construction was realized based on the basis of the knitting schemes of guide bars and related yarns as proposed in the present invention, namely:
L1 : discontinuous yarn (F1) 10/12; L2: continuous yarn (F2) 33/00;
L3: discontinuous yarn (F3) 10/34. The knitting test, set up for a 380 cm width with 8 stitches/cm, was carried out at a speed of 1500 revolution/min (rpm), obtaining a daily yield of about 1368 kg/day, equal to 1900 running m/day.
After the various finishing operations (raising, cutting and heat-fixing) there was obtained in this way a warp knitted fabric of the pile type having a weight of about 300 g/m2 only and a width equal to 230 cm.

Claims

1. A warp knitted fabric comprising at least a continuous yarn and at least a discontinuous yarn, wherein said discontinuous yarn is at least 50% by weight of the fabric, characterized in that said discontinuous yarn is knitted with said continuous yarn according to at least two different knitting patterns, and is distributed in a substantially equal manner on both sides of the fabric, wherein the continuous yarn is kept in the inside of said fabric.
2. The warp knitted fabric according to claim 1 , wherein said continuous yarn is knitted according to a 33/00 pattern.
3. The warp knitted fabric according to claim 1 , wherein at least part of said discontinuous yarn is knitted according to a 10/12 pattern.
4. The warp knitted fabric according to claim 1 , wherein at least part of said discontinuous yarn is knitted according to a 10/34 pattern.
5. The warp knitted fabric according to claim 1 , wherein said continuous yarn is a thread from texturized polyester.
6. The warp knitted fabric according to claim 1 , wherein said discontinuous yarn is constituted by polyester staple.
7. The warp knitted fabric according to claim 1 , wherein said discontinuous yarn is constituted by a yarn selected among: acetate, polyester staple, polyester, polyester FR (Flame Retardant), cotton, polyamide, viscose,
acrylic, acrylic FR (Flame Retardant), modacrylic FR, acrylic outdoor,
wool, woolens, polypropylene.
8. The warp knitted fabric according to claim 7, wherein said discontinuous yarn is constituted by a blend of at least two different yarns selected among those indicated in claim 7.
9. The warp knitted fabric according to claim 1, wherein said continuous yarn is constituted by a yarn selected among: acetate, polyester, polyester FR (Flame Retardant), polyamide, viscose, acrylic, acrylic FR (Flame Retardant), modacrylic FR, acrylic outdoor, polypropylene.
10. The warp knitted fabric according to claim 9, wherein said continuous yarn is constituted by a blend of at least two different yarns selected among those indicated in claim 9.
11. The warp knitted fabric according to claim 1, wherein said fabric is subjected to raising and cutting operations on both sides.
12. The warp knitted fabric according to claim 1, wherein said fabric is subjected to dyeing operations.
13. The warp knitted fabric according to claim 1, wherein said fabric is subjected to printing operations.
14. Use of a warp knitted fabric according to any of claims 1-13 for the realization of single or double bedspreads or plaid blankets without having to join them.
15. Use of a warp knitted fabric according to any of claims 1-13 for the realization of clothing items.
16. Process for the preparation of the warp knitted fabric according to claim 1, wherein at least a first part and at least a second part of said discontinuous yarn are knitted by at least two distinct guide bars, and at least a third guide bar for the continuous yarn is interposed between said at least two distinct guide bars.
17. Process for the preparation of the warp knitted fabric according to claim 1 , wherein said fabric is realized with at least three full threaded guide bars.
PCT/IB2001/001641 2001-09-10 2001-09-10 Warp knitted fabric made of mixed yarns WO2003023105A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IB2001/001641 WO2003023105A1 (en) 2001-09-10 2001-09-10 Warp knitted fabric made of mixed yarns

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IB2001/001641 WO2003023105A1 (en) 2001-09-10 2001-09-10 Warp knitted fabric made of mixed yarns

Publications (1)

Publication Number Publication Date
WO2003023105A1 true WO2003023105A1 (en) 2003-03-20

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957451B1 (en) 2009-08-18 2010-05-11 조인숙 Irregular two-tone kniting and weaving method thereof
CN103205859A (en) * 2012-01-16 2013-07-17 杜邦公司 Warp knitting fabric comprising polytrimethylene terephthalate
CN103290613A (en) * 2013-06-08 2013-09-11 江苏澳丹奴家纺有限公司 Soft warp-knitted fabric
CN107974759A (en) * 2017-12-25 2018-05-01 江南大学 Warp knit single needle bed leads the preparation method of wet reversible cloth
WO2019210439A1 (en) * 2018-05-01 2019-11-07 Yao Juan Method for manufacturing nitrile viscose blended woven fabric

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103359A (en) * 1964-12-11 1968-02-14 Tricol Oy Warp knit fabric
US4802346A (en) * 1987-12-21 1989-02-07 E. I. Du Pont De Nemours And Company Method of warp knitting
FR2671812A1 (en) * 1991-01-22 1992-07-24 Delcer Textile Warp knitting with invisible weft
WO1998027255A1 (en) 1996-12-18 1998-06-25 Sitip S.P.A. Process for the production of warp-knitted fabrics realised with discontinuous fibre yarns and apparatus for the realisation thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1103359A (en) * 1964-12-11 1968-02-14 Tricol Oy Warp knit fabric
US3474644A (en) * 1964-12-11 1969-10-28 Karl Frank Method of warp knitting
US4802346A (en) * 1987-12-21 1989-02-07 E. I. Du Pont De Nemours And Company Method of warp knitting
FR2671812A1 (en) * 1991-01-22 1992-07-24 Delcer Textile Warp knitting with invisible weft
WO1998027255A1 (en) 1996-12-18 1998-06-25 Sitip S.P.A. Process for the production of warp-knitted fabrics realised with discontinuous fibre yarns and apparatus for the realisation thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100957451B1 (en) 2009-08-18 2010-05-11 조인숙 Irregular two-tone kniting and weaving method thereof
CN103205859A (en) * 2012-01-16 2013-07-17 杜邦公司 Warp knitting fabric comprising polytrimethylene terephthalate
WO2013109513A1 (en) 2012-01-16 2013-07-25 E. I. Du Pont De Nemours And Company Warp knitted fabric comprising polytrimethylene terephthalate and method of making same
EP2949799A1 (en) 2012-01-16 2015-12-02 E. I. du Pont de Nemours and Company Warp knitted fabric comprising polytrimethylene terephthalate and use thereof
US9347157B2 (en) 2012-01-16 2016-05-24 E I Du Pont De Nemours And Company Warp knitted fabric comprising polytrimethylene terephthalate and method of making same
CN103290613A (en) * 2013-06-08 2013-09-11 江苏澳丹奴家纺有限公司 Soft warp-knitted fabric
CN107974759A (en) * 2017-12-25 2018-05-01 江南大学 Warp knit single needle bed leads the preparation method of wet reversible cloth
CN107974759B (en) * 2017-12-25 2019-07-16 江南大学 Warp knit single needle bed leads the preparation method of wet reversible cloth
WO2019210439A1 (en) * 2018-05-01 2019-11-07 Yao Juan Method for manufacturing nitrile viscose blended woven fabric

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