GB2218432A - Producing impregnated coated yarn - Google Patents
Producing impregnated coated yarn Download PDFInfo
- Publication number
- GB2218432A GB2218432A GB8902216A GB8902216A GB2218432A GB 2218432 A GB2218432 A GB 2218432A GB 8902216 A GB8902216 A GB 8902216A GB 8902216 A GB8902216 A GB 8902216A GB 2218432 A GB2218432 A GB 2218432A
- Authority
- GB
- United Kingdom
- Prior art keywords
- varieties
- staple fibre
- die
- polyester
- nylon
- 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
Links
- 239000000835 fiber Substances 0.000 claims description 13
- 238000002844 melting Methods 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 13
- 230000008018 melting Effects 0.000 claims description 8
- 239000004677 Nylon Substances 0.000 claims description 7
- 229920001778 nylon Polymers 0.000 claims description 7
- 229920000728 polyester Polymers 0.000 claims description 7
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 239000004760 aramid Substances 0.000 claims description 3
- 229920003235 aromatic polyamide Polymers 0.000 claims description 3
- -1 polypropylene Polymers 0.000 claims description 3
- 239000004743 Polypropylene Substances 0.000 claims description 2
- 229920001155 polypropylene Polymers 0.000 claims description 2
- 239000003570 air Substances 0.000 description 4
- 229920000271 Kevlar® Polymers 0.000 description 3
- 229920000784 Nomex Polymers 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000004761 kevlar Substances 0.000 description 3
- 239000004763 nomex Substances 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000008393 encapsulating agent Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
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
- D02G3/40—Yarns in which fibres are united by adhesives; Impregnated yarns or threads
- D02G3/402—Yarns in which fibres are united by adhesives; Impregnated yarns or threads the adhesive being one component of the yarn, i.e. thermoplastic yarn
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
- Treatment Of Fiber Materials (AREA)
Description
ALBANY r, ",'18 4 -3 2 Z --- 70/3221/01 METHOD FOR PRODUCING IMPREGNATED
COATED YARN This invention relates to yarns of the type which are used in the manufacture of absorbent clothing or felt for machines in the papermaking industry.
In processes conventionally used to coat yarns, it has proved difficult to ensure that the coating or encapsulating agent penetrates to the core of the yarn structure, because of the density of the individual fibres. As a result, impregnation is often incomplete, and some air remains trapped in the regions between these individual fibres. A yarn of less than optimum strength and integrity is often the outcome.
According to the present invention, a method for producing an impregnated, coated yarn structure, comprises drawing, through a heated die having a tapering passage, a carded roving containing two varieties of staple fibre, the varieties havinq different melting temperatures, in which the die is maintained at a temperature between the different melting temperatures. 20 The carded roving is preferably twisted to the desired degree of tightness before being passed through the heated die. The passage through the die gradually narrows or tapers in the direction of travel of the fibres being passed through. The temperature of the die must be controlled so that onIv the fibres having the lower melting point will become fluid, and flow completely around those having the higher melting point. The die temperature must nevertheless be lower than that which would damage the fibres to be coated and encapsulated. The twist of the fibres of the unmelted component is not affected by the heat, and maintains the same degree of tightness. The taper of the die compresses the molten fluid and forces out any air bubbles present.
Once the structure exits from the die, the molten fluid solidifies as it is cooled by 'the ambient air. The resulting yarn has a structure of twisted staple fibres completely bonded by thermoplastic material and void of any trapped air bubbles.
The die is constructed of say, polytetrafluoroethylene, e.g. as marketed under the registered Trade Mark Teflon. A number of paired fibre combinations have been tried and found workable. In the following list, the first polymer of each combination has the lower melting temperature ("Nomex" and "Kevlar" are registered Trade Marks representing aramid and polypropylene, respectively): nylon and polyester nylon and Nomex polvester and Nomex nylon and Kevlar polyester and Kevlar nylon and acrylic polyester and acrylic to 75% The blend of fibres preferably comprises by weight of the lower-melting point fibres. In practice, the proportion of low-melt to high-melt fibres is governed by the amount of fibre encapsulation required. In general, the higher the percentage of lower-melting fibre, the stiffer will be the resulting yarn. The method is therefore capable of being engineered to produce yarns having specific properties.
Products of the invention have desirable properties including strength, uniform structural integrity, and the total encapsulation of fibres within a thermoplastic,coating.
The invention will now be described by way of example only with reference to the accompanying drawing.
The drawing shows, on the left side, a carded roving 1 of 9i i 1 v two staple fibres, low-melting fibres 2 and high-melting fibres 3r twisted together to a desired degree of tightness by suitable means (not shown). The twisted strand of carded roving 1 is drawn through a heated, compressing die 4, in the direction indicated by the arrow, by another suitable means (also not shown).
The die 4 is tapered and is positioned and fixed in a metal die retainer 5 which supplies the necessary heat to the die 4. Heat from the die 4 melts the fibres 2.
In the course of passage through the die 4, the compression that arises from the taper in the die 4 forces the-molten component 2 completely around the fibres 3. Air remaining in the spaces between the fibres 3 is forced out by the compressing action of the die 4.
On the right side of the drawing, a strand of yarn 6 emerges from the die 4, made up of fibres 3 which have been coatea and totally impregnated with a lower-melting component t I-C 0
Claims (11)
- CLAIMS 1. A method for producing an impregnated, coated yarn structure,comprising drawing, through a heated die having a tapering passage, a carded roving containing two varieties of staple fibre, the varieties having different melting temperatures, in which the die is maintained at a temperature between the different melting temperatures.
- 2. A method according claim 1, comprising the additional step of twisting the carded roving containing the two varieties of staple fibre before drawing it through the heated die.
- 3. A method according to claim 1 or claim 2, wherein the staple fibres comprise 25 to 75% by weight of the variety of staple fibre having the lower melting temperature.
- 4. A method according to any of claims I to 3, wherein the two varieties of staple fibre are nylon and polyester.
- 5. A method according to any of claims 1 to 3, wherein the two varieties of staple fibre are nylon and aramid.
- 6. A method according to any of claims 1 to 3, wherein the two varieties of staple fibre are polyester and aramid.
- 7. A method according to any of claims 1 to 3, wherein the two varieties of staple fibre are polyester and polypropylene.
- 8. A method according to any of claims I to 3, wherein the two varieties of staple fibre are nylon and acrylic.
- 9. A method according to any of claims I to 3, wherein the two varieties of staple fibre are polyester and acrylic.
- 10. A method according to claim 1, substantially as herein described with reference to the accompanying drawinq.
- 11. An impregnated, coated yarn produced by a method according to any preceding claim.Published 1989 atThe Patent Office, State House, 6671 High Holbom,London WClR4TP. Further copies maybe obtainedfrom The Patent Office. Sales Branch, St Mary Cray, Orpington. Kent BR5 3RD. Printed by Multiplex techniques ltd, St Mary Cray, Kent, Con. 1/87 z z
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19238788A | 1988-05-10 | 1988-05-10 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8902216D0 GB8902216D0 (en) | 1989-03-22 |
| GB2218432A true GB2218432A (en) | 1989-11-15 |
| GB2218432B GB2218432B (en) | 1992-08-05 |
Family
ID=22709436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8902216A Expired - Fee Related GB2218432B (en) | 1988-05-10 | 1989-02-01 | Method for producing impregnated coated yarn |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JP2703614B2 (en) |
| BR (1) | BR8901988A (en) |
| CA (1) | CA1336056C (en) |
| DE (1) | DE3913788A1 (en) |
| FI (1) | FI89079C (en) |
| GB (1) | GB2218432B (en) |
| SE (1) | SE508608C2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486884A1 (en) * | 1990-11-20 | 1992-05-27 | Cytec Technology Corp. | Method for making hybrid yarn |
| WO2004033774A1 (en) * | 2002-10-10 | 2004-04-22 | Dsm Ip Assets B.V. | Process for making a monofilament-like product |
| EP1617927A2 (en) * | 2002-12-31 | 2006-01-25 | Hollinee Glass Corporation | Three component filtration material |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4321560A1 (en) * | 1993-06-29 | 1995-01-12 | Danubia Petrochem Deutschland | Polyolefin yarn and fabric |
| DE19961216A1 (en) * | 1999-12-15 | 2001-06-28 | Hempage Ag | Reinforcement material, process for its manufacture and use of the reinforcement material |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085567A (en) * | 1965-06-28 | 1967-10-04 | Ici Ltd | Improvements in or relating to compact filament bundles and their production |
| GB1185623A (en) * | 1966-04-30 | 1970-03-25 | Bondina Ltd | A method of Forming a Bonded Textile Product |
| GB1558992A (en) * | 1975-07-16 | 1980-01-09 | Nederlandse Appl Scient Res | Method of heat-treating a staple fibre yarn |
| GB1575817A (en) * | 1976-04-20 | 1980-10-01 | Inst Textile De France | Method of making fancy yarn and fancy yarn |
| GB2122228A (en) * | 1982-06-02 | 1984-01-11 | Bioresearch Inc | Composite surgical sutures |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7340070U (en) * | 1974-12-05 | Textilwerk Goch Gmbh | Yarn made from synthetic fibers | |
| DE72939C (en) * | D. MATTEI in Genua, Italien | Method and apparatus for dyeing textile fibers in the form of card tapes or roving | ||
| US3694131A (en) * | 1971-03-25 | 1972-09-26 | Dart Ind Inc | Die for impregnating and coating filamentary material |
| JPS4936058A (en) * | 1972-08-09 | 1974-04-03 | ||
| US4275117A (en) * | 1977-09-02 | 1981-06-23 | Ashaway Line & Twine Mfg. Co. | String construction produced by subjecting a fibrous strand composed of fibrous materials having differing melting points to heating conditions sufficient to melt some but not all of the fibrous materials |
| JPS5716934A (en) * | 1980-06-27 | 1982-01-28 | Fujikura Ltd | Aromatic polyamide twisted yarn |
-
1989
- 1989-02-01 GB GB8902216A patent/GB2218432B/en not_active Expired - Fee Related
- 1989-02-15 FI FI890731A patent/FI89079C/en not_active IP Right Cessation
- 1989-03-08 JP JP1053943A patent/JP2703614B2/en not_active Expired - Lifetime
- 1989-04-07 SE SE8901249A patent/SE508608C2/en not_active IP Right Cessation
- 1989-04-26 DE DE3913788A patent/DE3913788A1/en not_active Ceased
- 1989-04-27 BR BR898901988A patent/BR8901988A/en not_active IP Right Cessation
- 1989-05-10 CA CA000599300A patent/CA1336056C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1085567A (en) * | 1965-06-28 | 1967-10-04 | Ici Ltd | Improvements in or relating to compact filament bundles and their production |
| GB1185623A (en) * | 1966-04-30 | 1970-03-25 | Bondina Ltd | A method of Forming a Bonded Textile Product |
| GB1558992A (en) * | 1975-07-16 | 1980-01-09 | Nederlandse Appl Scient Res | Method of heat-treating a staple fibre yarn |
| GB1575817A (en) * | 1976-04-20 | 1980-10-01 | Inst Textile De France | Method of making fancy yarn and fancy yarn |
| GB2122228A (en) * | 1982-06-02 | 1984-01-11 | Bioresearch Inc | Composite surgical sutures |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486884A1 (en) * | 1990-11-20 | 1992-05-27 | Cytec Technology Corp. | Method for making hybrid yarn |
| WO2004033774A1 (en) * | 2002-10-10 | 2004-04-22 | Dsm Ip Assets B.V. | Process for making a monofilament-like product |
| EP1617927A2 (en) * | 2002-12-31 | 2006-01-25 | Hollinee Glass Corporation | Three component filtration material |
| EP1617927A4 (en) * | 2002-12-31 | 2007-04-11 | Ahlstrom Air Media Llc | Three component filtration material |
Also Published As
| Publication number | Publication date |
|---|---|
| SE8901249D0 (en) | 1989-04-07 |
| BR8901988A (en) | 1989-12-05 |
| FI890731A0 (en) | 1989-02-15 |
| GB2218432B (en) | 1992-08-05 |
| FI890731L (en) | 1989-11-11 |
| SE508608C2 (en) | 1998-10-19 |
| FI89079B (en) | 1993-04-30 |
| SE8901249L (en) | 1989-11-11 |
| JP2703614B2 (en) | 1998-01-26 |
| FI89079C (en) | 1993-08-10 |
| GB8902216D0 (en) | 1989-03-22 |
| CA1336056C (en) | 1995-06-27 |
| DE3913788A1 (en) | 1989-11-23 |
| JPH0214038A (en) | 1990-01-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20020201 |