WO2005007956A1 - A knitted fabric - Google Patents

A knitted fabric Download PDF

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Publication number
WO2005007956A1
WO2005007956A1 PCT/IB2004/002231 IB2004002231W WO2005007956A1 WO 2005007956 A1 WO2005007956 A1 WO 2005007956A1 IB 2004002231 W IB2004002231 W IB 2004002231W WO 2005007956 A1 WO2005007956 A1 WO 2005007956A1
Authority
WO
WIPO (PCT)
Prior art keywords
knitted fabric
threads
series
knitted
monofilament
Prior art date
Application number
PCT/IB2004/002231
Other languages
French (fr)
Inventor
Michael Gordon Dickson
Original Assignee
Alnet (Proprietary) Limited
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 Alnet (Proprietary) Limited filed Critical Alnet (Proprietary) Limited
Publication of WO2005007956A1 publication Critical patent/WO2005007956A1/en

Links

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B21/00—Warp knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B21/14—Fabrics 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
    • D04B21/16—Fabrics 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 incorporating synthetic threads
    • 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
    • D10B2401/22—Physical properties protective against sunlight or UV radiation

Definitions

  • This invention relates to a knitted fabric.
  • the threads of said first and third series may be in the form of monofilament threads.
  • the monofilament threads of the first series may comprise between 12 and 20 Pillar stitches per inch of fabric.
  • the monofilament threads of the first series may comprise 16 Pillar stitches per inch of fabric.
  • the monofilament threads of the third series may traverse the equivalent of two needle gaps in a weft direction and one needle gap in warp direction.
  • Each monofilament thread may have a diameter of between 0.1mm and 0.3mm.
  • the monofilament threads may be of high density polyethylene (HOPE) of approximately 400 Denier.
  • HOPE high density polyethylene
  • At least one of the threads may have a fire-retardant substance incorporated therein. More particularly, at least one of the first and third series of monofilament threads may have a fire-retardant substance incorporated therein.
  • both of the first and third series of monofilament threads may have a fire-retardant substance incorporated therein.
  • the fire-retardant substance may be a halogenated bromine compound.
  • Each monofilament thread may contain, by weight, approximately 80% to 90% by weight of HDPE and 9% to 19% of said fire-retardant substance.
  • Each monofilament thread may contain, by weight, approximately 85% of the polymer compound, 3% of a colouring agent and 12% of the fire-retardant substance.
  • the threads of said second series may be in the form of monotapes.
  • the monotapes of the second series may traverse the equivalent of three needle gaps in a weft direction and one needle gap in a warp direction.
  • the monotapes may be of HDPE of approximately 350 Denier.
  • the monotapes may have a width of approximately 1.8mm and a thickness of approximately 0.035mm.
  • the monotapes of the second series and the monofilament threads of the third series may be knitted so as to extend in opposite directions in a weft direction.
  • the proportion, by weight, of the monofilament threads to the monotapes may be in the order of 1 ,3:1.
  • the monotapes may be free of a fire-retardant substance.
  • the knitted fabric may have a density of between E6 and E12. Preferably, the knitted fabric has a density of E8.
  • the knitted fabric may be produced on a knitting machine employing three guide bars having needle gaps 1/8 of an inch.
  • Figure 1 shows a schematic vertical section of a knitting machine of the type used to make a knitted fabric in accordance with the invention
  • Figure 2 is a pattern diagram illustrating the configuration of the different stitches of the monofilament threads and the monotapes forming the knitted fabric in accordance with the invention.
  • Figure 3 is a pattern diagram which illustrates the knit configuration of the knitted fabric. DESCRIPTION OF PREFERRED EMBODIMENT
  • a 1 6-gauge (E8) Raschel-type knitting machine which is used to produce the knitted fabric in accordance with the invention, comprises a series of latch needles 10, a trick plate 1 2 and three guide bars, the first guide bar carrying a series of guide needles 14.1 , the second guide bar carrying a series of guide needles 14.2 and the third guide bar carrying a series of guide needles 14.3.
  • the latch needles of the knitting machine are spaced 1 /8 of an inch apart. Hence, the needle gaps are 1 /8 inch (i.e. 1 /8 inch measured between the centres of the needles).
  • a knitted fabric 1 6 made on the knitting machine comprises a first series of monofilament threads M1 each of which passes through the eye of a corresponding one of the guide needles 14.1 , a second series of monotapes T each of which passes through the eye of a corresponding one of the guide needles 14.2 and a third series of monofilament threads M2 each of which passes through the eye of a corresponding one of the guide needles 14.3.
  • the monofilament threads M 1 and M2 are 400 Denier monofilament threads of HDPE.
  • the monotapes T are in the form of 350 Denier HDPE tape, having a width of 1 .8mm and a thickness of 0,035mm.
  • the monofilament threads M1 are knitted to form Pillar stitches which gives the fabric tensile strength in the warp (course) direction.
  • the monofilament threads M1 are knitted with 1 6 Pillar stitches per inch of fabric (i.e. 16 courses per inch of fabric).
  • the monotapes T are knitted to form Sammt stitches which traverse three needle gaps in a weft direction and one needle gap in a warp direction.
  • the monofilament threads M2 are knitted using Tuch stitches extending in a weft direction and traverse the equivalent of two needle gaps in a weft direction and one needle gap in a warp direction.
  • the fabric Due to the knit configuration of the knitted fabric, the fabric exhibits substantially equal elongation and tensile strength properties in both weft and warp directions.
  • the knit configuration thus provides a knit fabric having uniform properties in both weft and warp directions which renders the fabric particularly suitable for use in high tensile sheet structures wherein substantially equal tensile strength properties in both weft and warp directions are required.
  • the monofilament threads M1 and M2 are formed in an extrusion process and have a fire-retardant substance incorporated therein in the extrusion process.
  • the fire-retardant substance in this example is a halogenated bromine compound.
  • the monofilament threads M 1 and M2 are typically black in colour and thus do not require an ultra-violet (U-V) stabiliser to provide protection against U-V degradation.
  • U-V ultra-violet
  • each monofilament thread M1 and M2 contains, by weight, approximately 85% of HDPE, 3% colouring agent and 1 2% of the fire-retardant compound.
  • the monofilament threads and the monotapes of the knitted fabric may be of other polymer compounds such as polypropylene or
  • the following pattern-chain is used to set up the knitting machine and defines the knit configuration:
  • the knitted fabric is particularly suitable for use as a fire-retardant shade net which is subjected, in use, to tensile forces acting in both weft and warp directions of the fabric.
  • the knit configuration has been designed to provide the knitted fabric with excellent fire-retardant qualities by providing for an optimal distribution of the fire-retardant substance throughout the fabric while at the same time providing the fabric with substantially equal elongation and tensile strength properties in both weft and warp directions.

Abstract

A knitted fabric comprising a first series of monofilament threads (M1) that are knitted to form Pillar stitches extending in a warp direction, a second series of monotapes (T) that are knitted to form Sammt stitches extending in a weft direction and a third series of monofilament threads (M2) that are knitted using Tuch stitches extending in a weft direction. The monofilament threads (M1) are knitted using (16) Pillar stitches per inch of fabric. The Sammt stitches of the monotapes (T) traverse three needle gaps in a weft direction and one needle gap in a warp direction. The Tuch stitches of the monofilament threads (M2) traverse two needles gaps in a weft direction and one needle gap in a warp direction. The monofilament threads (M1) and (M2) have a fire retardant substance incorporated therein.

Description

A KNITTED FABRIC
FIELD OF INVENTION
This invention relates to a knitted fabric.
SUMMARY OF INVENTION
According to the invention there is provided a knitted fabric comprising
a first series of threads wherein the threads are knitted using Pillar stitches extending in a warp direction;
a second series of threads wherein the threads are knitted using Sammt stitches extending in a weft direction; and
a third series of threads wherein the threads are knitted using Tuch stitches extending in a weft direction. The threads of said first and third series may be in the form of monofilament threads.
The monofilament threads of the first series may comprise between 12 and 20 Pillar stitches per inch of fabric.
The monofilament threads of the first series may comprise 16 Pillar stitches per inch of fabric.
The monofilament threads of the third series may traverse the equivalent of two needle gaps in a weft direction and one needle gap in warp direction.
Each monofilament thread may have a diameter of between 0.1mm and 0.3mm.
The monofilament threads may be of high density polyethylene (HOPE) of approximately 400 Denier.
At least one of the threads may have a fire-retardant substance incorporated therein. More particularly, at least one of the first and third series of monofilament threads may have a fire-retardant substance incorporated therein.
In a particular embodiment, both of the first and third series of monofilament threads may have a fire-retardant substance incorporated therein.
The fire-retardant substance may be a halogenated bromine compound. Each monofilament thread may contain, by weight, approximately 80% to 90% by weight of HDPE and 9% to 19% of said fire-retardant substance.
Each monofilament thread may contain, by weight, approximately 85% of the polymer compound, 3% of a colouring agent and 12% of the fire-retardant substance.
The threads of said second series may be in the form of monotapes.
The monotapes of the second series may traverse the equivalent of three needle gaps in a weft direction and one needle gap in a warp direction.
The monotapes may be of HDPE of approximately 350 Denier.
The monotapes may have a width of approximately 1.8mm and a thickness of approximately 0.035mm.
The monotapes of the second series and the monofilament threads of the third series may be knitted so as to extend in opposite directions in a weft direction.
The proportion, by weight, of the monofilament threads to the monotapes, may be in the order of 1 ,3:1.
The monotapes may be free of a fire-retardant substance. The knitted fabric may have a density of between E6 and E12. Preferably, the knitted fabric has a density of E8.
The knitted fabric may be produced on a knitting machine employing three guide bars having needle gaps 1/8 of an inch.
BRIEF DESCRIPTION OF THE DRAWINGS
Further features of the invention are described hereinafter by way of a non-
limiting example of the invention, with reference to and as illustrated in the accompanying diagrammatic drawings. In the drawings:
Figure 1 shows a schematic vertical section of a knitting machine of the type used to make a knitted fabric in accordance with the invention;
Figure 2 is a pattern diagram illustrating the configuration of the different stitches of the monofilament threads and the monotapes forming the knitted fabric in accordance with the invention; and
Figure 3 is a pattern diagram which illustrates the knit configuration of the knitted fabric. DESCRIPTION OF PREFERRED EMBODIMENT
Referring to Figure 1 , a 1 6-gauge (E8) Raschel-type knitting machine which is used to produce the knitted fabric in accordance with the invention, comprises a series of latch needles 10, a trick plate 1 2 and three guide bars, the first guide bar carrying a series of guide needles 14.1 , the second guide bar carrying a series of guide needles 14.2 and the third guide bar carrying a series of guide needles 14.3. The latch needles of the knitting machine are spaced 1 /8 of an inch apart. Hence, the needle gaps are 1 /8 inch (i.e. 1 /8 inch measured between the centres of the needles).
A knitted fabric 1 6 made on the knitting machine comprises a first series of monofilament threads M1 each of which passes through the eye of a corresponding one of the guide needles 14.1 , a second series of monotapes T each of which passes through the eye of a corresponding one of the guide needles 14.2 and a third series of monofilament threads M2 each of which passes through the eye of a corresponding one of the guide needles 14.3.
The monofilament threads M 1 and M2 are 400 Denier monofilament threads of HDPE. The monotapes T are in the form of 350 Denier HDPE tape, having a width of 1 .8mm and a thickness of 0,035mm.
As can be seen in Figure 2 of the drawings, the monofilament threads M1 are knitted to form Pillar stitches which gives the fabric tensile strength in the warp (course) direction. The monofilament threads M1 are knitted with 1 6 Pillar stitches per inch of fabric (i.e. 16 courses per inch of fabric).
The monotapes T are knitted to form Sammt stitches which traverse three needle gaps in a weft direction and one needle gap in a warp direction.
The monofilament threads M2 are knitted using Tuch stitches extending in a weft direction and traverse the equivalent of two needle gaps in a weft direction and one needle gap in a warp direction.
Due to the knit configuration of the knitted fabric, the fabric exhibits substantially equal elongation and tensile strength properties in both weft and warp directions. The knit configuration thus provides a knit fabric having uniform properties in both weft and warp directions which renders the fabric particularly suitable for use in high tensile sheet structures wherein substantially equal tensile strength properties in both weft and warp directions are required.
The monofilament threads M1 and M2 are formed in an extrusion process and have a fire-retardant substance incorporated therein in the extrusion process. The fire-retardant substance in this example, is a halogenated bromine compound. The monofilament threads M 1 and M2 are typically black in colour and thus do not require an ultra-violet (U-V) stabiliser to provide protection against U-V degradation. In a particular example, each monofilament thread M1 and M2 contains, by weight, approximately 85% of HDPE, 3% colouring agent and 1 2% of the fire-retardant compound.
It will be appreciated that the monofilament threads and the monotapes of the knitted fabric may be of other polymer compounds such as polypropylene or
polyester.
The following pattern-chain is used to set up the knitting machine and defines the knit configuration:
Bar 1 (M1 ) Bar 2 (T) Bar 3 (M2) 2 6 2 0 8 0
2 Q fi
The knitted fabric is particularly suitable for use as a fire-retardant shade net which is subjected, in use, to tensile forces acting in both weft and warp directions of the fabric. In particular, the knit configuration has been designed to provide the knitted fabric with excellent fire-retardant qualities by providing for an optimal distribution of the fire-retardant substance throughout the fabric while at the same time providing the fabric with substantially equal elongation and tensile strength properties in both weft and warp directions.

Claims

1. A knitted fabric comprising
a first series of threads wherein the threads are knitted using Pillar stitches extending in a warp direction;
a second series of threads wherein the threads are knitted using Sammt stitches extending in a weft direction; and
a third series of threads wherein the threads are knitted using Tuch stitches extending in a weft direction.
2. A knitted fabric as claimed in Claim 1 , wherein the threads of said first and third series are in the form of monofilament threads.
3. A knitted fabric as claimed in Claim 2, wherein the monofilament threads of the first series comprise between 12 and 20 Pillar stitches per inch of fabric.
4. A knitted fabric as claimed in Claim 3, wherein the monofilament threads of the first series comprise 16 Pillar stitches per inch of fabric.
5. A knitted fabric as claimed in any one of the claims 2 to 4, wherein the monofilament threads of the third series traverse the equivalent of two needle gaps in a weft direction and one needle gap in warp direction.
6. A knitted fabric as claimed in any one of claims 2 to 5, wherein each monofilament thread has a diameter of between 0.1mm and 0.3mm.
7. A knitted fabric as claimed in any one of claims 2 to 6, wherein the monofilament threads are of high density polyethylene (HDPE) of approximately 400 Denier.
8. A knitted fabric as claimed in any one of claims 2 to 7, wherein at least one of the threads has a fire-retardant substance incorporated therein.
9. A knitted fabric as claimed in Claim 8, wherein at least one of the first and third series of monofilament threads has a fire-retardant substance incorporated therein.
10. A knitted fabric as claimed in Claim 9, wherein both of the first and third series of monofilament threads have a fire-retardant substance incorporated therein.
11. A knitted fabric as claimed in Claim 10, wherein the fire-retardant substance is a halogenated bromine compound.
12. A knitted fabric as claimed in Claim 11 , wherein each monofilament thread contains, by weight, approximately 80% to 90% by weight of HDPE and 9% to
13. A knitted fabric as claimed in Claim 12, wherein each monofilament thread contains, by weight, approximately 85% of the polymer compound, 3% of a colouring agent and 12% of the fire-retardant substance.
14. A knitted fabric as claimed in any one of claims 2 to 13, wherein the threads of said second series are in the form of monotapes.
15. A knitted fabric as claimed in Claim 14, wherein the monotapes of the second series traverse the equivalent of three needle gaps in a weft direction and one needle gap in a warp direction.
16. A knitted fabric as claimed in Claim 15, wherein the monotapes are of HDPE of approximately 350 Denier.
17. A knitted fabric as claimed in Claim 16, wherein the monotapes have a width of approximately 1.8mm and a thickness of approximately 0.035mm.
18. A knitted fabric as claimed in Claim 17, wherein the monotapes of the second series and the monofilament threads of the third series are knitted so as to extend in opposite directions in a weft direction.
19. A knitted fabric as claimed in Claim 18, wherein the proportion, by weight, of the monofilament threads to the monotapes, is in the order of 1 ,3:1.
20. A knitted fabric as claimed in any one of claims 14 to 19, wherein the monotapes are free of a fire-retardant substance.
21. A knitted fabric as claimed in any one of the preceding claims, which has a density of between E6 and E12.
22. A knitted fabric as claimed in Claim 21 , wherein the knitted fabric preferably has a density of E8.
23. A knitted fabric as claimed in any one of the preceding claims, which is produced on a knitting machine employing three guide bars having needle gaps 1/8 of an inch.
24. A new knitted fabric substantially as described in the specification.
25. A knitted fabric substantially as described in the specification, with reference to and as illustrated in the accompanying diagrammatic drawings.
PCT/IB2004/002231 2003-07-23 2004-07-08 A knitted fabric WO2005007956A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA200305689 2003-07-23
ZA2003/5689 2003-07-23

Publications (1)

Publication Number Publication Date
WO2005007956A1 true WO2005007956A1 (en) 2005-01-27

Family

ID=34081013

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2004/002231 WO2005007956A1 (en) 2003-07-23 2004-07-08 A knitted fabric

Country Status (1)

Country Link
WO (1) WO2005007956A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3133194A1 (en) * 2015-08-20 2017-02-22 Glen Raven, Inc. Outdoor fabric

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3654054A (en) * 1969-08-22 1972-04-04 Gottlieb Binder Holzgerlingen Knitted fabric with projecting barbs
US3845641A (en) * 1968-08-26 1974-11-05 Binder Fa G Method and apparatus for producing a knitted fabric with projecting barbs

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845641A (en) * 1968-08-26 1974-11-05 Binder Fa G Method and apparatus for producing a knitted fabric with projecting barbs
US3654054A (en) * 1969-08-22 1972-04-04 Gottlieb Binder Holzgerlingen Knitted fabric with projecting barbs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3133194A1 (en) * 2015-08-20 2017-02-22 Glen Raven, Inc. Outdoor fabric
US10465316B2 (en) 2015-08-20 2019-11-05 Glen Raven, Inc. Outdoor fabric

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