GB2026053A - Yarn processing method - Google Patents
Yarn processing method Download PDFInfo
- Publication number
- GB2026053A GB2026053A GB7920400A GB7920400A GB2026053A GB 2026053 A GB2026053 A GB 2026053A GB 7920400 A GB7920400 A GB 7920400A GB 7920400 A GB7920400 A GB 7920400A GB 2026053 A GB2026053 A GB 2026053A
- Authority
- GB
- United Kingdom
- Prior art keywords
- yarn
- polyester
- impregnated
- temperature
- heat treatment
- 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
- 238000003672 processing method Methods 0.000 title abstract description 5
- 229920000728 polyester Polymers 0.000 claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims abstract description 16
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 14
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 14
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 claims abstract description 12
- 238000007127 saponification reaction Methods 0.000 claims abstract description 12
- 239000013585 weight reducing agent Substances 0.000 claims abstract description 12
- 238000009991 scouring Methods 0.000 claims abstract description 11
- 239000007864 aqueous solution Substances 0.000 claims abstract description 10
- 239000000835 fiber Substances 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 19
- 229920000742 Cotton Polymers 0.000 abstract description 7
- 239000000243 solution Substances 0.000 description 14
- 239000003513 alkali Substances 0.000 description 11
- 239000004744 fabric Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 238000011282 treatment Methods 0.000 description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000006722 reduction reaction Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 238000011946 reduction process Methods 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 150000008044 alkali metal hydroxides Chemical class 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M11/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
- D06M11/32—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
- D06M11/36—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
- D06M11/38—Oxides or hydroxides of elements of Groups 1 or 11 of the Periodic Table
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical Or Physical Treatment Of Fibers (AREA)
Abstract
In a yarn processing method a filament yarn, a staple fibre yarn of polyester or a polyester mixed yarn, such as a polyester and cotton yarn, is impregnated with an aqueous solution of a saponification agent such as sodium hydroxide or potassium hydroxide. The impregnated yarn is then subjected to a steam heat treatment in an atmosphere of saturated steam maintained at a high temperature and pressure so as continuously and simultaneously to effect weight reduction, scouring and setting of the yarn.
Description
SPECIFICATION
Yarn processing method
This invention relates to a method for processing a polyester yarn in order to effect setting, scouring and weight reduction thereof. By the term "polyester yarn" is meant a polyester filament yarn, a staple fibre yarn of polyester, or a polyester mixed yarn such as a mixed yarn of polyester and cotton.
In a conventional yarn processing method, a scouring treatment is carried out to enhance the quality of a cloth material obtained by weaving or knitting polyester yarns, and in particular to restrain the cloth material from wrinkling or shrinking during treatment, and to ensure a uniform clear dyeing effect in a setting treatment. Furthermore, in order to give the cloth material a particular feel or touch-for example, similar to the feel of silk-an alkali weight reduction process is also carried out.
However, in a cloth treated in this manner, the texture tends to display "slip' '-that is to say, the surfaces of adjacent yarns tend to slide into close contact with each other-to an extent depending on the kind of yarns with which the cloth material is woven or knit where the material is not densely woven or knit. Thus, in conventional methods for treating with an alkali solution, the quality of such cloth materials tends to be degraded.
It has been proposed to overcome this drawback of conventional methods by carrying out the alkali weight reduction process on the yarns before they are woven or knit into a cloth material.
In a known process, wads of yarns are treated with an alkali solution. It will be appreciated that it has been difficult to enable the solution or applied humid heat to act on the core of the wads of yarn so as to treat the yarn uniformly. Thus, it has been difficult uniformly to carry out treatments such as scouring and weight reduction. At the same time, it has also been found difficult to carry out these treatments in a continuous manner.
The present invention concerns a method for processing polyester yarn by subjecting it both to saponification and to humid heat.
The invention seeks to provide a method for processing yarns which may be adapted to allow continuous treatment of the yarn to reduce the time, labour and cost which have heretofore been required for conventional yarn processing methods.
It has been established that where a portion of the fibre of a polyester yarn is saponified by means of an alkali solution a weight-reduced yarn is produced having a hard surface which is crystallized to a high degree. In heat treatment this hard surface of the yarn is melted and removed, so that the yarn is softened and given an appearance and feel closer to that of silk.
In accordance with this invention, there is provided a method for processing a polyester yarn, in which the polyester yarn is impregnated with from 25% to 80% (based on the weight of the yarn) of an aqueous solution containing from 80 to 360 g/l of an alkaline saponification agent and the impregnated yarn is then subjected for a period of from 10 to 1 80 seconds to heat treatment in saturated steam maintained at superatmospheric pressure and at a temperature of from 1 20 C to 1 65 C to effect setting, scouring and weight reduction of the yarn.
It will be appreciated that in the steam heat treatment, the polyester fibre of the yarn is set and caused to shrink by the hygro-thermic action of the saturated steam. In the case of a mixed yarn consisting of polyester fibre and cotton fibre, the impurities contained in the cotton are saponified and washed away by the saponification agent and the steam heat process, so that scouring takes place. Furthermore, in the case of a mixed yarn containing cotton fibre, if the concentration of the aqueous solution of the saponification agent is arranged to be higher than 1 35 g/l of the agent, cotton can be completely mercerized. With yarns processed in the manner according to this invention, a cloth material made from the previously processed yarns obviates the necessity of subsequent scouring, setting and weight reduction treatments of the cloth material.
The saponification agent may be an alkali metal hydroxide, and preferred agents are sodium and potassium hydroxide. Advantageously, the temperature of the aqueous solution is maintained at substantially 40"C.
Particularly where the yarn is polyester mixed yarn, it is preferred for the saturated steam to be maintained at a temperature of from 1 20 C to 1 60 C. However, in some instances and especially in the case where the yarn is a polyester filament yarn or a polyester staple fibre yarn, the temperature of the saturated steam is preferably from 1 25 C to 1 65 C.
Advantageously, the impregnated yarn is subjected to the steam heat treatment for a period of from 10 to 1 20 seconds and in a preferred embodiment this treatment time is substantially 1 20 seconds.
The parameters of the process are chosen with regard to the nature of the yarn being treated and the desired product. For example, when processing a polyester mixed yarn, it is preferred to employ the saponification agent in an amount of 80% by weight of the yarn, and to subject the impregnated yarn to the heat treatment in saturated steam for 2 minutes (120 seconds) at from 125 to 165"C.
It is desirable for the weight reduction of the yarn to be in the range of from 10% to 30%.
This may be achieved, together with the desired degree of scouring and setting, by adjustment of the concentration of the saponification agent, the degree of impregnation of the yarn, the steam temperature and the time for which the heat treatment is maintained. It is believed to be within the competence of one skilled in the art to select appropriate process conditions, if necessary empirically with the ranges specified herein.
The following Examples, which are given by way of illustration only, show certain aspects of the invention in more detail.
Example 1
An aqueous solution was prepared, comprising 1 90 g/l of sodium hydroxide and 5 g/l of
Scourol FC 250, and the solution was maintained at a temperature of 40"C. A single, mixed yarn of No. 45 comprising 65% polyester and 35% cotton was immersed in the solution in order to impregnate the mixed yarn with the solution. The impregnated yarn was then wrung to adjust the weight of impregnating solution to 80% of the weight of the yarn. The impregnated yarn was then subjected to a heat treatment for two minutes in saturated steam at a superatmospheric pressure and at a temperature in the range of from 1 25 C to 1 65 C. The treated yarn was slowly cooled, washed with water and then dried.The degree of shrinkage, weight reduction, alkali reaction and the scouring effects for the yarn attained in experiments conducted in this manner were as shown in the following table:
Steam Degree of Degree of Degree of Scouring temperature shrinkage weight alkali effect
reduction reaction 125"C 4% 12.0% 40% Good 140 " 7% 19.6% 63% 145 " 7% 23.2% 75% II 150 " 8% 30.0% 97% II Example 2
An aqueous solution was prepared, containing 360 g/l of sodium hydroxide and was maintained at a temperature of 40"C. A 1 20 denier yarn made up of 100% polyester filaments was immersed in the solution to impregnate the yarn with the solution.The impregnated yarn was then wrung to adjust the quantity of the solution to be 25% by weight of the yarn. The impregnated yarn was then subjected to a steam heat treatment for two minutes in saturated steam which was maintained at a super-atmospheric pressure and at a temperature in the range of from 1 20 C to 1 60 C. The treated yarn was slowly cooled, washed with water and then dried.The degree of shrinkage, weight reduction and alkali reaction for the yarn attained in experiments conducted in this manner was as shown in the following table:
Steam Degree of Degree of Degree of temperature shrinkage weight alkali
reduction reaction 120"C 4% 10% 62% 130 1l 5% 15% 93% 140 " 7% 16% 100% 150 1l 9% 16% 100% 160 1l 11% 17% 106%
Example 3
An aqueous solution was prepared, comprising a mixture of 21 6 g/l of potassium hydroxide and 5 g/l of Scourol FC 250, and the solution was maintained at a temperature of 40"C. A single staple fibre yarn of No. 45 and consisting of 100% polyester was immersed in the solution to impregnate the yarn. The impregnated yarn was wrung to adjust the weight of the impregnating solution to 70% of the weight of the yarn. Then, the yarn was subjected to a steam heat treatment for a period of from 10 to 1 80 seconds in an atmosphere of saturated steam maintained at a super-atmospheric pressure and at a temperature of 1 60 C. The treated yarn was slowly cooled, washed with water and dried. The degree of shrinkage, weight reduction and alkali reaction attained in experiments conducted in this manner were as shown in the following table:
Length of Degree of Degree of Degree of steam heating shrinkage weight alkali time (sec.) (%) reduction reaction (%) , (%)
10 12 4.0 18 18 30 12 17.7 82
60 12 21.1 98 120 12 22.0 102 180 12 22.6 105
Claims (11)
1. A method of processing a polyester yarn, in which the polyester yarn is impregnated with from 25% to 80% (based on the weight of the yarn) of an aqueous solution containing from 80 to 360 g/l of an alkaline saponification agent and the impregnated yarn is then subjected for a period of from 10 to 1 80 seconds to heat treatment in saturated steam maintained at superatmospheric pressure and at a temperature of from 120"C to 165"C to effect setting, scouring and weight reduction of the yarn.
2. A method as claimed in Claim 1, in which the saturated steam is maintained at a temperature within the range of from 120"C to 160"C.
3. A method as claimed in Claim 1, in which the saturated steam is maintained at a temperature within the range of from 125"C to 165"C.
4. A method as claimed in any of the preceding claims, in which the saponification agent is sodium hydroxide.
5. A method as claimed in any of claims 1 to 3 wherein the saponification agent is potassium hydroxide.
6. A method as claimed in any of the preceding claims wherein the impregnated yarn is subjected to the heat treatment for a period of from 10 to 1 20 seconds.
7. A method as claimed in any of the preceding claims, wherein the impregnated yarn is subjected to the heat treatment for a period of substantially 1 20 seconds.
8. A method as claimed in Claim 1, wherein a polyester mixed yarn is impregnated with 80% of the aqueous solution containing the saponification agent, and the impregnated yarn is subjected for 1 20 seconds to the heat treatment, the temperature of the saturated steam being between 125'Cand 165"C.
9. A method as claimed in Claim 1, wherein the yarn is a polyester filament yarn or polyester staple fibre yarn and the heat treatment is effected using saturated steam at a temperature between 120"C and 160"C.
10. A method as claimed in any of the preceding claims, in which the temperature of the aqueous solution is maintained at substantially 40"C.
11. A method of processing yarn as claimed in Claim 1, substantially as hereinbefore described with reference to any one of the Examples.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7064078A JPS551309A (en) | 1978-06-12 | 1978-06-12 | Yarn finishing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2026053A true GB2026053A (en) | 1980-01-30 |
| GB2026053B GB2026053B (en) | 1982-09-08 |
Family
ID=13437439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7920400A Expired GB2026053B (en) | 1978-06-12 | 1979-06-12 | Yarn processing method |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPS551309A (en) |
| DE (1) | DE2923803A1 (en) |
| GB (1) | GB2026053B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4367070A (en) * | 1980-02-21 | 1983-01-04 | Toray Industries, Inc. | Process for treating fibrous structure |
| EP0328287A2 (en) * | 1988-02-01 | 1989-08-16 | Dow Corning Corporation | A method of altering the surface of a solid synthetic polymer |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS584883A (en) * | 1981-06-30 | 1983-01-12 | 小松精練株式会社 | Dyeing of polyester fabric |
| JPS5898475A (en) * | 1981-12-08 | 1983-06-11 | 酒伊繊維工業株式会社 | Continuous weight reduction of polyester synthetic fiber fabric |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS496300A (en) * | 1972-05-10 | 1974-01-19 | ||
| JPS5529194B2 (en) * | 1974-06-10 | 1980-08-01 | ||
| JPS517298A (en) * | 1974-07-09 | 1976-01-21 | Santo Tekkosho Kk | |
| JPS5111997A (en) * | 1974-07-14 | 1976-01-30 | Santo Tekkosho Kk | Senihinno kotakuoyobi fuaio kaizensuru shorihoho |
-
1978
- 1978-06-12 JP JP7064078A patent/JPS551309A/en active Pending
-
1979
- 1979-06-12 DE DE19792923803 patent/DE2923803A1/en not_active Ceased
- 1979-06-12 GB GB7920400A patent/GB2026053B/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4367070A (en) * | 1980-02-21 | 1983-01-04 | Toray Industries, Inc. | Process for treating fibrous structure |
| EP0328287A2 (en) * | 1988-02-01 | 1989-08-16 | Dow Corning Corporation | A method of altering the surface of a solid synthetic polymer |
| EP0328287A3 (en) * | 1988-02-01 | 1990-06-13 | Dow Corning Corporation | A method of altering the surface of a solid synthetic polymer |
| AU605958B2 (en) * | 1988-02-01 | 1991-01-24 | Dow Corning Corporation | Method of altering the surface of a solid synthetic polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2923803A1 (en) | 1979-12-20 |
| JPS551309A (en) | 1980-01-08 |
| GB2026053B (en) | 1982-09-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |