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GB2350844A - A non woven sheet material - Google Patents

A non woven sheet material Download PDF

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Publication number
GB2350844A
GB2350844A GB0014180A GB0014180A GB2350844A GB 2350844 A GB2350844 A GB 2350844A GB 0014180 A GB0014180 A GB 0014180A GB 0014180 A GB0014180 A GB 0014180A GB 2350844 A GB2350844 A GB 2350844A
Authority
GB
United Kingdom
Prior art keywords
filaments
adhesive
base sheet
yarn
stitched
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.)
Withdrawn
Application number
GB0014180A
Other versions
GB0014180D0 (en
Inventor
William Hamish Tough
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.)
Scott and Fyfe Ltd
Original Assignee
Scott and Fyfe Ltd
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 Scott and Fyfe Ltd filed Critical Scott and Fyfe Ltd
Publication of GB0014180D0 publication Critical patent/GB0014180D0/en
Publication of GB2350844A publication Critical patent/GB2350844A/en
Withdrawn legal-status Critical Current

Links

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
    • D04H1/44—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling
    • D04H1/45—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 the fleeces or layers being consolidated by mechanical means, e.g. by rolling by forming intermeshing loops or stitches from some of the fibres
    • 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
    • D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
    • D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • 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
    • D04H1/58—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/60—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently
    • D04H1/62—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in dry state, e.g. thermo-activatable agents in solid or molten state, and heat being applied subsequently at spaced points or locations
    • 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
    • D04H1/58—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives
    • D04H1/64—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions
    • D04H1/66—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 applying, incorporating or activating chemical or thermoplastic bonding agents, e.g. adhesives the bonding agent being applied in wet state, e.g. chemical agents in dispersions or solutions at spaced points or locations

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Carpets (AREA)

Abstract

A composite non-woven sheet materia 2 comprising a base material, for example creped paper, is formed with reinforcing stitches to provide dimensional stability and control of extensibility. The yam forming the stitches is made of a multiplicity of filaments adhered together to form a single cohesive element. The adhering may be carried out by application of adhesive, which later sets or cures, or by melting together the individual filaments of the yams, both to themselves and to adjacent yams. A method is disclosed for manufacture of said material comprising passing the stitched material 2 over a roll 4 coated in adhesive, the material 2 being dried in a subsequent drying process eg by passing over a heated roll or by passing it through an oven. In a further embodiment the yam filaments may be adhered by passing through an oven and heating to a temperature sufficient to cause softening or melting of the yam sheath resulting in the sheath filaments flowing into each other forming a unitary structure.

Description

9 2350844 IMPROVEMENTS IN NON-WOVEN SHEET MATERIAL This invention relates
to composite non-woven sheet material.
The material with which the present invention is concerned is of a type comprising a base sheet, for example of creped material, which is stitched to reinforce same. The exact nature and format of the stitching depends upon the particular desired characteristics. An example of such a material, for use in the manufacture of carpet backing material, is described in our British Patent No. 1422940.
British Patent No. 1422940 describes a composite material of the above type in which the base material takes the form of creped paper and is formed with parallel rows of stitches in the warp direction. Optionally, transverse threads may be laid on the creped paper so as to be secured by the aforesaid rows of stitches to thus provide additional reinforcement in the weft direction. In order to fabricate a carpet backing or underlay material the composite material according to Patent No 1422940 is glued to a sheet of foam rubber.
According to a first aspect of the present invention there is provided a method of manufactudng a composite non-woven sheet material comprising a base sheet which is stitched to reinforce same using stitching yarn made up of a multiplicity of filaments, said method being characterised in that said filaments are adhered together into a single cohesive element.
The effect of this is that the yarn acts in the manner of a beam.
Adhering the filaments into a single element may be achieved by applying an adhesive to the yarns, which is taken up by the yarn, due to its filamentary structure, and which hardens, sets or cures to form the single cohesive element. Conveniently, the adhesive is applied to one or both sides of the stitched base sheet so that the adhesive is picked up by the yarns and taken into its filamentary structure, as described above.
Alternatively, if the yarns comprise co-extruded multifilament yarns, in which each filament is made up of a core of a first plastics material, surrounded by a sheath of a second plastics material having a lower melting or softening temperature than the first plastics material, then the adhering of the filaments into a single element can be achieved by the application of heat, which softens or melts the sheath material so that the material of adjacent sheaths will flow into one another and thus achieve the same effect as the use of adhesive described above.
According to a second aspect of the invention there is provided a composite non-woven sheet material comprising a base sheet which is stitched to reinforce same using stitching yarn made up of a multiplicity of filaments, said material being characterised in that said filaments are selectively adhered together into a single cohesive element.
The filaments may be adhered together substantially continuously along the length of the yarn to provide a substantially continuous cohesive element. Alternatively the filaments may be adhered together at selected spaced points along the length of the yarn. These points preferably correspond to the interstices of the yarn - the points at which the loop from one stitch meets that from the next, and passes through the base sheet.
The adhering of the filaments of the multifilament stitching yarns by adhesive, application of heat, or other means gives the following benefits over the existing product:
1) The use of the invention improves the dimensional stability of the product. This is due to the mechanical beam effect which is produced when the yam is effectively converted from a bundle of filaments into a single cohesive yarn which acts in the manner of a beam. Surprisingly also, it has been found that the dimensional stability of carpet which is loose laid on top of an underlay made from the material of the invention is also improved. This is demonstrated by the reduced amount of stretching of the carpet when in use or when it is subjected to accelerated wear testing in a testing rig.
2) The application of the invention, as well as stiffening the yarn, also tends to stabilise the stitch structure itself and thus, for example, prevents the stitches unravelling when the material is cut. Unravelling of the stitches results in an unsightly and irregular array of loose yarns. The use of the invention dramatically improves the appearance of the cut edge.
3) In some applications of the material, it is necessary to stick the material down to a surface, for example a floor or wall, and the use of the S invention makes the process of sticking down much easier because the tool used to spread the glue used for sticking down (usually a trowel) does not get caught in the stitching.
4) The use of stitched yarn is intended to control the extensibility of the base product which would, without the stitching, effectively give virtually no control of extensibility. The use of the invention stiffens the yarn and retains this control of extensibility but also introduces an element of compactibility because the yarns tend to adhere to the base material so that the material becomes more unitary in nature.
Adhesive may be applied to the yarn in various different ways but is preferably applied after stitching. In one embodiment, the stitched base sheet is passed over a roller which has a thin film of adhesive on its surface so that the yarn (which generally lies on top of the surface of the base sheet) is able to selectively pick up an amount of adhesive. Various parameters of this process, such as the speed of movement of the material over the roller, the force with which the material is pressed onto the roller and the length of the arc over which the material is in contact with the roller will control the amount of adhesive applied and the extent to which it is also applied to the base sheet. The object of the exercise is to avoid, as far as possible, the application of adhesive to the base sheet but in practice it is likely that a small amount will find its way onto the base sheet, but this will not detract from the advantages of the finished product.
In order to coat the roller with adhesive, it is positioned in a bath of liquid adhesive such that, as it rotates, the adhesive is taken up from the bath onto the surface of the roller and evenly coats the surface of the roller.
Rotation of the roller may be achieved by separate driving means, or may be achieved simply by the passage of the material over it, the material itself being driven by adjacent machinery.
After application of the adhesive, the material is thence preferably passed through a drying means in order to dry or cure the adhesive before it is finally rolled up for further processing or transport. The drying means may for example take the form of a heated roller over which the material is 5 passed, or a heated oven through which the material is passed.
Where the invention makes use of co-extruded multifilament yarns, as described above, stitching may be carried out in the usual way, after which it is only necessary to subject the stitched base sheet to heat in order to achieve the adhesion of the filaments. Heating may be carried out in various different ways, for example, by passing the stitched base sheet over a heated roll, or by passing it through an oven. Heating needs to be controlled in such a way that the sheath is brought up to a temperature sufficient to soften or melt it, but not sufficient to substantially affect the structural integrity of the core material. For example, in the case of a sheath made of polypropylene, and a core made of polyester (a common combination), a temperature of the order of 165C will soften the sheath to the required extent.
In order that the invention may be better understood, an embodiment thereof will now be described with reference to the accompanying drawing which is a diagrammatic representation of a process for making the composite material of the invention, using the adhesive method.
The drawing shows a base roll 1 consisting of a roll of base material 2, for example creped kraft paper. The base material may be supplied as a plain sheet, there being an optional stage (not shown) in which it is creped, or it may be supplied as creped paper in the first place. Note, however, that the base material does not have to be creped at all.
The creped paper 2 is passed to a stitching machine 3 which subjects the base material to a weft inlay and warp chain or trico stitching process resulting in parallel lines of chain or trico stitching in the warp direction and transverse threads in the weft direction which are locked by the warp chain or trico stitching. An example of the stitching which may be applied by machine 3 is shown and described in detail in the aforementioned British Patent No. 1422940. Any suitable thread may be used, for example polyester multi-filament yarn. The denier of the yarn may be the same or different in the warp and weft directions.
The result of the stitching process is that both surfaces of the base material are overlayed by the stitching yarn. In the next process step, the composite material is now passed over a lick roll 4 which is dipped into a bath 5 of suitable liquid adhesive. As the roll 4 rotates, it picks up a thin film of adhesive onto its surface, and this adhesive is applied to the composite material as it makes contact with the roll. Adhesive on the surface of the lick roll is transferred to the yarn lying on the surface of the base material, particularly the warp stitches, and soaks into the multi filament yarn by capillary action. The pressure of the material on the roller must not be so great that the adhesive is applied to the underlying base material as well, at least not to too great an extent. A small amount of overspill adhesive on the base material will not harm the advantageous properties of the composite material (see above), but too much will.
The composite material is next passed through a heating unit 6 in which the material is passed over an oil-heated roll 7 which dries or cures the adhesive before the material is finally wound up onto a roll 8 to await further processing or transport.
The steps of stitching, applying adhesive and heating can be carried out in a continuous process, as described above; alternatively the stitching process may be carried out beforehand as a separate step, and the stitched base material rolled up to await the further process steps.
The yarn used to fabricate the stitches may be of the co-extruded type, fabricated of a bundle of filaments in which each filament is made up of a core material which is co-extruded with a surrounding sheath material.
Generally speaking the core material provides the structural strength of the yarn, and has a higher softening or melting point than the sheath material.
Typically the core of each filament is made from polyester and the sheath from polypropylene.
If such co-extruded multifilament yarns are used, an alternative process may be used in which the application of adhesive, represented by lick roll 4 and adhesive bath 5, is omitted, and the stitched material from the stitching machine 3 is passed straight to the heating unit 6 where it is brought up to a temperature sufficiently high to soften or melt the sheath material, but not so high as to substantially reduce the strength of the core filaments, so as to allow the softened or melted material of adjacent sheaths to flow into one another to provide a unitary reinforced structure.

Claims (17)

1 A method of manufacturing a composite non-woven sheet material comprising a base sheet which is stitched to reinforce same using stitching yarn made up of a multiplicity of filaments, said method being characterised in that said filaments are selectively adhered together into a single cohesive element.
2. A method as claimed in claim 1 wherein the step of adhering the filaments together takes place after the step of stitching the base sheet with the stitching yarn.
3. A method as clamed in claim 2 wherein said filaments are adhered together substantially continuously along the length of the yarn.
4. A method as claimed in claim 2 wherein said filaments are adhered together at selected spaced points along the length of the yarn.
5. A method as claimed in claim 4 wherein said spaced points correspond to the interstices of the stitches formed on the base sheet.
6. A method as claimed in any one of claims 2 to 5 wherein the step of adhering the filaments together comprises applying an adhesive to the yarns and thence allowing said adhesive to set or cure to form said single cohesive element.
7. A method as claimed in claim 6 wherein the adhesive is applied to one side only of the stitched base sheet.
8. A method as claimed in claim 6 wherein the adhesive is applied to both sides of the stitched base sheet.
9. A method as claimed in any one of claims 6 to 8 wherein adhesive is applied by passing the stitched base sheet over a roller which has a thin film of adhesive on its surface.
10. A method as claimed in claim 9 wherein, after passing over the roller, the stitched base sheet is passed through a drying means for the purpose of drying or curing the adhesive.
11. A method as claimed in any one of claims 2 to 5 wherein the yarns comprise multifilament yarns made up of a core of a first plastics material surrounded by a sheath of a second plastics material having a lower melting or softening temperature than the first plastics material, said step of adhering the filaments together comprising the application of heat to the stitched base sheet so as to soften or melt the sheath material to a sufficient extent that the material of adjacent sheaths will flow into one another to form said single cohesive element.
12. A composite non-woven sheet material comprising a base sheet which is stitched to reinforce same using stitching yarn made up of a multiplicity of filaments, said material being characterised in that said filaments are selectively adhered together into a single cohesive element.
13. A composite non-woven sheet material as claimed in claim 12 wherein said filaments are adhered together by means of adhesive.
14. A composite non-woven sheet material as claimed in either one of claims 12 or 13 wherein said filaments are adhered together substantially continuously along the length of the yarn.
15.. A composite non-woven sheet material as claimed in claim 13 wherein said filaments are adhered together at selected spaced points along the length of the yarn.
16. A composite non-woven sheet material as claimed in claim 15, wherein said spaced points correspond to the interstices of the stitches formed on the base sheet.
17. A composite non-woven sheet material as claimed in claim 12 wherein each filament is made up of a core of a first plastics material surrounded by a sheath of a second plastics material having a lower melting or softening temperature than the first plastics material, and wherein the sheath material of adjacent sheaths is melted together to produce said single cohesive element.
GB0014180A 1999-06-10 2000-06-09 A non woven sheet material Withdrawn GB2350844A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GBGB9913537.8A GB9913537D0 (en) 1999-06-10 1999-06-10 Improvements in non-woven sheet material

Publications (2)

Publication Number Publication Date
GB0014180D0 GB0014180D0 (en) 2000-08-02
GB2350844A true GB2350844A (en) 2000-12-13

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ID=10855115

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9913537.8A Ceased GB9913537D0 (en) 1999-06-10 1999-06-10 Improvements in non-woven sheet material
GB0014180A Withdrawn GB2350844A (en) 1999-06-10 2000-06-09 A non woven sheet material

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GBGB9913537.8A Ceased GB9913537D0 (en) 1999-06-10 1999-06-10 Improvements in non-woven sheet material

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1422940A (en) * 1972-01-19 1976-01-28 Fyfe Ltd Scott Nonwoven sheet material
DE3717921A1 (en) * 1987-05-27 1988-12-15 Ackermann Goeggingen Ag YARN, ESPECIALLY SEWING YARN, AND METHOD AND DEVICE FOR THE PRODUCTION THEREOF
JPH07133537A (en) * 1993-11-08 1995-05-23 Kanebo Ltd Sewing yarn
JPH07197344A (en) * 1993-12-28 1995-08-01 Unitika Ltd High-strength sewing yarn

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1422940A (en) * 1972-01-19 1976-01-28 Fyfe Ltd Scott Nonwoven sheet material
DE3717921A1 (en) * 1987-05-27 1988-12-15 Ackermann Goeggingen Ag YARN, ESPECIALLY SEWING YARN, AND METHOD AND DEVICE FOR THE PRODUCTION THEREOF
JPH07133537A (en) * 1993-11-08 1995-05-23 Kanebo Ltd Sewing yarn
JPH07197344A (en) * 1993-12-28 1995-08-01 Unitika Ltd High-strength sewing yarn

Also Published As

Publication number Publication date
GB9913537D0 (en) 1999-08-11
GB0014180D0 (en) 2000-08-02

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