EP0060953A1 - Als Kreppgarn verwendbares texturiertes Garn - Google Patents
Als Kreppgarn verwendbares texturiertes Garn Download PDFInfo
- Publication number
- EP0060953A1 EP0060953A1 EP81306200A EP81306200A EP0060953A1 EP 0060953 A1 EP0060953 A1 EP 0060953A1 EP 81306200 A EP81306200 A EP 81306200A EP 81306200 A EP81306200 A EP 81306200A EP 0060953 A1 EP0060953 A1 EP 0060953A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- filaments
- component
- sheath
- core component
- 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- Withdrawn
Links
- 239000000306 component Substances 0.000 claims abstract description 53
- 239000008358 core component Substances 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 20
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 12
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 9
- 239000004952 Polyamide Substances 0.000 claims abstract description 5
- 229920002647 polyamide Polymers 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 229920006149 polyester-amide block copolymer Polymers 0.000 claims abstract description 4
- 229920000728 polyester Polymers 0.000 claims description 11
- 239000004677 Nylon Substances 0.000 claims description 2
- 229920001778 nylon Polymers 0.000 claims description 2
- 229920002292 Nylon 6 Polymers 0.000 description 6
- 239000004744 fabric Substances 0.000 description 6
- -1 polyethylene terephthalate Polymers 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000000919 ceramic Substances 0.000 description 2
- 235000013351 cheese Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000986 disperse dye Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
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
- D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
- D02G1/0253—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting while bonding at least some of the filaments or fibres together
Definitions
- Conventional crepe yarn is a highly twisted yarn of high torque.
- the twisting process is comparatively slow and expensive, and the torque in the yarn makes it difficult to process.
- the present invention is concerned to provide a novel crepe yarn by a new process which is more economic than the conventional one.
- a crepe yarn is characterised by a core component of continuous thermoplastic filaments and a sheath component of continuous thermoplastic filaments false-twisted around the core component in a sequence of spiral windings of changing hand with filaments of the sheath component adhering to filaments of the core component.
- one or both of the core component and the sheath component comprises polyester or polyamide filaments.
- the invention includes a process for making a crepe yarn which is characterised by taking a yarn in which a sheath component of continuous thermoplastic filaments having an extensibility of at least 60 per cent is combined with a core component of continuous thermoplastic filaments having an extensibility at least 30 per cent below that of the sheath component, the said components also having a difference of softening temperature, feeding the yarn under tension through a false-twist texturising unit employing rotary friction discs at a D/Y ratio in the range 1.39 to 4.0 to false-twist the yarn, whereby the sheath component is twisted about the core component in a sequence of spiral windings of changing hand, and heating the false-twisted yarn to a temperature at which the filaments of only one of said components soften, whereby filaments of the sheath component become adhered to filaments of the core component.
- the crepe yarn of the invention has a low level of torque because the sequence of spiral windings of changing hand produces a substantial balance in torque. The form of these spiral windings is maintained because sheath component filaments are adhered to core component filaments. The resulting yarn has the characteristic handle and appearance of a crepe yarn.
- the false-twist process of the invention can be carried out at speeds greatly in excess of those used in twisting processes and is more economic.
- Standard machines can be used with the rotary friction disc texturising units in common use, including those made by Barmag A.G., Ernest Scragg & Sons Ltd., and F.A.G. These usually comprise stacks of friction discs mounted on spindles arranged at the corners of a triangle so that the discs intermesh to provide a tortuous yarn path between them.
- the friction rims of the discs comprise or are coated with a ceramic material.
- the sheath component is required to have an extensibility which is at least 60 per cent and which is greater than that of the core component.
- Yarns suitable for the sheath component include undrawn yarns and partially orientated yarns (POY); particularly of polyamide or polyester filaments.
- the core component may comprise a substantially fully orientated yarn produced directly by high speed spinning or by subsequent drawing of POY or undrawn yarn.
- POY may also be used for the core component in the process of the invention providing it exhibits an extensibility at least 30 per cent below that of the sheath component.
- the extensibility is no greater than about 110 per cent and polyester POY spun at 3,500 metres per minute or more will usually satisfy this condition.
- the sheath and core components used in the process of the invention are required to have a difference in softening temperature so that the false-twisted yarn may be heated up to a temperature at which one component softens and sticks to the other component whilst that other component does not soften.
- a difference in softening temperature Preferably there is a difference of at least 10°C between the respective softening temperatures, and this is usually achieved given the required difference in extensibility.
- the rotary friction discs false-twist the yarn with the effect that the more extensible sheath component is stretched more than the core component by the induced tension and so becomes wound around the core filaments as a sheath.
- High-speed photography of the disc and yarn in motion during processing shows a phenomenon associated with this in which the more extensible sheath component is separated from the core component at the rim of the disc and forms an outflung loop.
- D/Y ratio is a well-known and used parameter for friction disc texturising and is the ratio of the surface speed of the friction disc to the yarn 'speed at the disc. The optimum value of the D/Y ratio for a given feedstock yarn can be determined by experiment.
- the draw ratio is the ratio of the surface speed of draw rollers drawing the yarn away from the texturising unit to the surface speed of the feed rollers feeding the yarn to that unit. In general, within the specified range, the D/Y ratio is reduced as the draw ratio is increased.
- the draw ratio used depends largely upon the extensibility of the core component. In order to produce a stable product yarn of minimum shrinkage higher draw ratios are used with more extensible core components.
- a suitable range for the common spectrum of nylon and polyester drawn yarns and POY is 1.02:1 to 1.3:1.
- the false-twisted yarn is heated to a temperature at which the filaments of one of the components soften.
- the component with the lower softening point will be the one with the higher extensibility, i.e. the sheath component.
- undrawn nylon 6 yarn begins to soften at about 155°C whereas fully drawn yarn can be processed without softening at temperatures in excess of 190°C.
- polyethylene terephthalate yarn although in that case the undrawn yarn starts to soften at a slightly higher temperature around 160°C.
- the conventional heaters used on texturing machines including contact and radiant heaters, may be used for heating the false-twisted yarn.
- the product yarn may be collected as a side-wound package.
- the adhesion of the filaments makes it unnecessary to insert true twist.
- a core component yarn 1 and a sheath component yarn 2 of extensibility greater than 60 per cent are withdrawn overend from cheese packages 3 and 4 respectively by feed rolls 5 of the 'Casablanca' apron type.
- the core component yarn 1 passes through the tube 6 on which the cheese of sheath component yarn is wound so that the sheath component yarn 2 is lightly wrapped around the core component yarn 1 as they pass together through the guide 7.
- the combined yarn 8 is then forwarded between the feed rolls 5 and the draw rolls 9 (also of the 'Casablanca' apron type) and is put under the required degree of tension by regulating the relative speeds of the draw and feed rolls.
- the yarn 8 Prior to the draw rolls, the yarn 8 passes successively through a heater 10 and a friction false-twisting unit 11.
- the friction false-twisting unit 11 is shown digrammatically as having intermeshing stacks of rotating friction discs.
- a suitable commercial unit is that made by Barmag A.G. using three stacks, each having three discs, mounted at the corners of a triangle.
- the discs are preferably ceramic at least at the rims where they contact the yarn.
- the product yarn 12 is collected as a side-wound package 13.
- the invention is further illustrated by the following Examples in which equipment as illustrated in the drawing was used with a Barmag texturising unit having ceramic discs.
- the yarns are identified by decitex and number of filaments in the usual way, for example 44/10.
- the polyester yarn is a poly(ethylene terephthalate) yarn.
- the product yarn was 100 per cent nylon 6 and had the handle and appearance of a crepe yarn. Its properties were measured and are as shown below.
- the yarn also gave 100 per cent recovery up to 10 per cent stretch.
- weft knitted in an interlock construction it produced an attractive crepe fabric with good stretch recovery.
- the product yarn was weft knitted in a plain construction to give a crepe fabric with good stretch recovery.
- the fabric was dyed with an aqueous dye liquor containing 0.5 per cent by weight of the disperse dye Palanil Blue NB (Colour Index No. Disperse Blue 56) at 50:1 liquor : goods ratio.
- the fabric was entered into the dye bath at a liquor temperature of 50°C, and then the temperature of the liquor was raised to the boil and held there for 30 minutes.
- the dyed fabric was rinsed with water, hydro-extracted and dried.
- the polyester sheath component was dyed blue and the nylon 6 core component was undyed so that the fabric had a marl appearance.
- the product yarn was 100 per cent polyester yarn with the characteristic handle and appearance of crepe yarn.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB8100004 | 1981-01-02 | ||
| GB8100004 | 1981-01-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0060953A1 true EP0060953A1 (de) | 1982-09-29 |
Family
ID=10518752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP81306200A Withdrawn EP0060953A1 (de) | 1981-01-02 | 1981-12-31 | Als Kreppgarn verwendbares texturiertes Garn |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP0060953A1 (de) |
| JP (1) | JPS5831135A (de) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1565922A (de) * | 1967-05-18 | 1969-05-02 | ||
| GB1217238A (en) * | 1968-03-12 | 1970-12-31 | Toray Industries | A textured yarn having a configuration of a plurality of fibers partially fused by melting and its manufacturing method |
| FR2170504A5 (de) * | 1971-12-20 | 1973-09-14 | Mitsubishi Rayon Co | |
| FR2179971A2 (de) * | 1972-04-12 | 1973-11-23 | Ici Ltd | |
| US3978647A (en) * | 1971-12-20 | 1976-09-07 | Mitsubishi Rayon Co., Ltd. | Highly coherent and rigid synthetic multifilamentary yarn and process for manufacturing the same |
| GB2029462A (en) * | 1978-08-31 | 1980-03-19 | Oda Gosen Kogyo Kk | False-twisting system for the production of composite crimped yarn |
-
1981
- 1981-12-31 EP EP81306200A patent/EP0060953A1/de not_active Withdrawn
-
1982
- 1982-01-04 JP JP1282A patent/JPS5831135A/ja active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1565922A (de) * | 1967-05-18 | 1969-05-02 | ||
| GB1217238A (en) * | 1968-03-12 | 1970-12-31 | Toray Industries | A textured yarn having a configuration of a plurality of fibers partially fused by melting and its manufacturing method |
| FR2170504A5 (de) * | 1971-12-20 | 1973-09-14 | Mitsubishi Rayon Co | |
| US3978647A (en) * | 1971-12-20 | 1976-09-07 | Mitsubishi Rayon Co., Ltd. | Highly coherent and rigid synthetic multifilamentary yarn and process for manufacturing the same |
| FR2179971A2 (de) * | 1972-04-12 | 1973-11-23 | Ici Ltd | |
| GB1420076A (en) * | 1972-04-12 | 1976-01-07 | Ici Ltd | Core yarns and methods for their manufacture |
| GB2029462A (en) * | 1978-08-31 | 1980-03-19 | Oda Gosen Kogyo Kk | False-twisting system for the production of composite crimped yarn |
| FR2434879A1 (fr) * | 1978-08-31 | 1980-03-28 | Oda Gosen Kogyo Kk | File en filaments frise et compose et procede de production d'un tel file |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5831135A (ja) | 1983-02-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Designated state(s): DE FR GB IT NL |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 19830902 |
|
| RIN1 | Information on inventor provided before grant (corrected) |
Inventor name: BAHIA, HARDEV SINGH |