CN85109764A - The production method of polyester thick and thin yarn - Google Patents
The production method of polyester thick and thin yarn Download PDFInfo
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- CN85109764A CN85109764A CN85109764.2A CN85109764A CN85109764A CN 85109764 A CN85109764 A CN 85109764A CN 85109764 A CN85109764 A CN 85109764A CN 85109764 A CN85109764 A CN 85109764A
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- silk
- stretching
- yarn
- draw ratio
- temperature
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Artificial Filaments (AREA)
Abstract
A kind of method for preparing polyester thick and thin yarn, the method comprises stretched polyester multifilament is not stretched with a certain draw ratio, this draw ratio is no more than the natural draw ratio of this kind silk, the elongation at break of silk is more than 70% after stretching, the temperature of employed stretching roller is no more than the crystallization temperature of this kind silk, its surperficial sliding friction is 4.0～6.0, silk after will stretching then passes a hot device, percentage elongation with 1.00～1.040 is heat-treated it, the temperature of heater is not higher than in the scope of its crystallization temperature again at the glass transition point that both is not less than in undrawn yarn.
Description
The present invention relates to a kind of process of producing the polyester multifilament thick and thin yarn.Relate to a kind of like this production method of thick and thin yarn more specifically, this Fancy Yarns is a kind of monofilament of being made up of the long filament of the thickness inequality that makes progress at fiber axis, the sectional area of this thick and thin yarn monofilament is distributed in the scope between the monofilament sectional area that does not stretch the monofilament sectional area and stretched, and the draw ratio of drawn yarn is at least 0.7 times of maximal draw ratio (MDR) herein.
In the past, the knitting or woven product of producing sesame point line outward appearance by synthetic fiber mainly are that the method by post processing realizes that post-processing approach comprises mixed strand of variegated silk fiber, or blending, or the fiber that will have different colorabilities each other mixes thigh, carry out piece dyeing then.
Two kinds of fibers that all these methods all must serviceability differ from one another or yarn, thus raw fiber preparation process complexity not only, and in subsequent handling, need very complicated quality control.
In addition, except sesame point line outward appearance,, the yarn of thickness joint is arranged in the use vertically also in order to obtain to spread a pattern design.This yarn is called bamboo section pattern yarn.The multifilament that belongs to bamboo section pattern yarn one class also is called thick and thin yarn usually.As Japanese patent application announce the 6615/66th and No. 19627/68 disclosed, the not stretched portion of all monofilament in this polyester filament thick and thin yarn all is on the same position of multifilament, form a branch of joint that do not stretch, as shown in Figure 6, like this along yarn axis to forming the some slubbings that do not stretch and the details of stretching.
Yet, though can making knitting or woven product have, this thick and thin yarn spreads a pattern design, but can't produce sesame point line outward appearance.In addition because this thick and thin yarn has kept not the joint that stretches, so when in subsequent handling, heat-treating fiber rupture easily or the rigidity that becomes too strong, this is the problem that the processing characteristics aspect of this yarn exists.The reason that produces this problem is that the slubbing of yarn almost all is made of the part that does not stretch, the concentrated main cause that occurs variety of issue exactly in heat treatment process of above-mentioned this not stretched portion.
About the existing suggestion of the method that addresses these problems, in the method with the thickness part along fiber axis to monofilament in high degree of dispersion.An example of the method is disclosed in Japanese Patent Application Publication No. 39411/85.
In this way the multifilament textile of Huo Deing its fiber axis to monofilament in shown that good slubbing disperses, this special uniformity (stage casing) of its tungsten-a kind of is described the index of decentralization-be 1.50% or lower.
Yet, if the drawing of the described method preparation of the above-mentioned Japanese Patent Application Publication of woven employing, fabric is made in dyeing then, though the joint of the thickness in the fabric disperses comparatively even, but owing to disperse to such an extent that be not fully evenly, thereby still show the uneven phenomenon of tangible dyeing, more not enough is owing to disperse
Uneven and slubbing that cause is concentrated and made its tearing strength low.
In order to solve the above-mentioned problem that has earlier in the process, the present inventor has carried out broad research so that further improve the dispersion of thickness joint.Found that the sliding friction of the surface of roller that stretch to use when drawn yarn can access the thick and thin yarn of thickness part high degree of dispersion, and woven product dyeing degree of irregularity is reduced greatly in a particular range time, has higher tearing strength.The present invention is found to be the basis with this.
The invention provides a kind of method for preparing thickness joint polyester Fancy Yarns, the method comprises stretched polyester multifilament is not stretched with a certain draw ratio that this draw ratio must not be higher than this natural draw ratio; And, being heated to the crystallization temperature (being as the criterion) that temperature range is no more than above-mentioned silk by use with 70～140 Ω, surperficial sliding friction is 4.0～6.0 stretching roller, making the elongation at break of the silk after the stretching is 70% or higher, is good with 75～90%; The silk that will obtain is then heat-treated with 1.001～1.040 percentage elongation, even silk is by a heater, the temperature range of heater is: both be not less than the glass transition point of Mi Lashen silk thread, be no more than its crystallization temperature again, be preferably 100～140 ℃.
Referring now to accompanying drawing the present invention is described in detail.
The example of stretching device used in the present invention is shown in Fig. 2, feeding the crystallization temperature that silk roller 2 and heated stretching roller 3(heating-up temperature are no more than silk) between, the silk that stretches and do not stretch with certain draw ratio, wherein draw ratio must not be higher than the silk natural draw ratio, and make stretched thread elongation at break be 70% or higher; According to, be that 1.001～1.040 percentage elongation is heat-treated heater 5(hot plate with scope between stretching roller 3 and 4) temperature both be not less than the glass transition point of drawn yarn, be not higher than its crystallization temperature again, then silk is wound on the bobbin 6.
Generally, when use was not higher than the draw ratio drawn yarn of natural draw ratio, being stretching between the thickness joint of silk shared, and this phenomenon causes the displacement of drawing point, causes the variation of tensile stress.As a result, carry out at this position that is stretching in the processing stability deficiency, and the result of processing stability difference comprises as the fibrous fracture phenomenon.Yet, as described in the invention, when under higher temperature (being no more than crystallization temperature), stretching, even adopt low draw ratio (must not be higher than natural draw ratio), the red brittleness that also can suppress slubbing, and in process, improve its processing characteristics, as reducing the fracture of silk and monofilament.
Because stretched portion and stretched portion do not mix existence in thickness joint fancy yarn, so long part of elongation mixed in together and the less part of elongation are arranged on tow is vertical, may for example there be the main cause of tension variation exactly in this in false twisting in subsequent handling, and cause processing stability low.When the elongation at break of the drawn yarn of making higher (being not less than 70% as described herein), the tension variation that occurs in the time of can eliminating false twisting, and can improve its processing stability.
About heat treatment temperature, need to guarantee good heat setting, and eliminate the red brittleness of slubbing, but its numerical value is not less than vitrification point.Can avoid intensity to reduce like this, and in stretching step and subsequent handling, improve its processing stability.In addition, under the temperature condition of heat treatment that is not higher than its crystallization temperature, utilize the difference on the Thermal Contraction Coefficient between the thickness joint, can make the fabric that obtains have bulkiness.When heat treatment temperature surpassed crystallization temperature, then the difference on the Thermal Contraction Coefficient reduced between the thickness joint, so just is difficult to obtain the good fabric of bulkiness.
Because the elongation heat-treating methods is adopted in heat treatment of the present invention, wherein percentage elongation is 1.001～1.040, so only produce faint red brittleness, this is clearly in loose heat reason, in addition, because percentage elongation is low, so slubbing can not be out of shape, and can sustain the stress that occurs in the elongation heat treatment process, thereby in procedure of processing, the fibrous fracture phenomenon can not occur.
In the present invention, the surperficial sliding friction of stretching roller is extremely important.Stretching surface of roller material and surface roughness thereof are depended in the surperficial sliding friction of stretching roller, and can use measuring apparatus shown in Figure 3.
The test roller 9 that its surperficial sliding friction will be measured is placed on two transmission sieve as follows and pulls between 7 and 8.Make pass above-mentioned test roller silk therewith the contact angle θ that forms of surface of roller be 100 ℃.
Measure and use 75 dawn of marketing, 36 bursts of polyester drawn yarns.Make silk by being fixed to the test roller 9 that can not rotate and contact, record the conveyance tension (T before testing roller 9 with its surface
1) and by the conveyance tension (T behind the roller 9
2).Surface sliding friction σ can be by down routine formula calculating
σ＝T
2/T
1。
Fig. 4 represents to stretch, and (relation of %, the Wu Site uniformity are the indexes of an expression thickness part dispersity for the surperficial sliding friction σ of roller and the Wu Site uniformity (stage casing).
Fig. 4 explanation can obtain less the Wu Site uniformity (stage casing) and good dispersity when surperficial sliding friction σ is in 4.0～6.0 scopes.
The surface sliding friction is lower than 4.0 or to be higher than 6.0 all be worthless, because can make the dispersity of slubbing and details inhomogeneous like that.
The variation of slubbing and details dispersity depends on that the reason of surperficial sliding friction is as described below.
When the surperficial sliding friction of the stretching roller that uses in the drawing process of the present invention greater than 6.0 the time, drawing point concentrates in the narrow region that indicates as Fig. 5 A mostly, this zone so the slubbing of monofilament accumulates on the same position of multifilament, causes decentralization low for the intake section of stretching 3.When in the scope of surperficial sliding friction σ 6.0～4.0, the stretching phenomenon is dispersed in the zone as the broad that B indicated among Fig. 5, can obtain meticulous and uniform dispersion.When surperficial sliding friction further is reduced to less than 4.0 the time, stretch then only to concentrate in the narrow zone that occurs in shown in C among Fig. 5, yarn is sent to small gross and draws 11 in leaving stretching roller 3 herein, result's rough segmentation state that looses of getting back.
The present invention can be illustrated with reference to the following examples.
Batch with the spinning speed of 1.700m/mm, the polyethylene terephthalate silk of the lovely luster of La Shening (fiber number was 100 dawn, and number of filaments is 36, and cross section is a triangle) does not stretch with stretching device shown in Figure 2.The vitrification point of undrawn yarn is measured (the 12nd page of Japanese fibre science 24 the 1st phase (1969) of volume of association journal) by dilatometry.The crystallization temperature of silk is measured by the scanning calorimeter, and numerical value is respectively 71 ℃ and 127 ℃.Undrawn yarn stretches with 1.796 draw ratio, the natural draw ratio of this yarn is 2.580, the temperature of stretching roller is 115 ℃, with 1.006 percentage elongation yarn is stretched on 120 ℃ hot plate subsequently, use the different stretching roller of surperficial sliding friction during stretching, the Wu Site uniformity (stage casing) that so obtains drawn yarn is shown in table 1.
Table 1
Annotate: ⊙: the best
Zero: good
*: bad
Illustrate in the table, when in the scope of surperficial sliding friction value 4.0～6.0 of stretching roller, the Wu Site uniformity (stage casing) the value minimum of the silk that obtains, the slubbing that DYED FABRICS is observed visually and the dispersity of minutiae patterns are meticulous and even.When surperficial sliding friction value less than 4.0 or greater than 6.0 the time, the Wu Site uniformity (stage casing) value increases, and the dispersity of slubbing and minutiae patterns is thick and inhomogeneous.
To stretch with stretching device shown in Figure 2 with the bright and lustrous poly-para Toluic Acid's ethyl ester silk (fiber number was 100 dawn, and number of filaments is 36, and cross section is a triangle) that does not stretch that the spinning speed of 1700m/min is batched.The glass transition point of stretch yarn is not measured by dilatometry, and its crystallization temperature is measured by the scanning calorimeter, and its numerical value is respectively 71 ℃ and 127 ℃.The surperficial sliding friction of employed stretching roller is 5.1～5.3 in the stretching device.Stretch with 1.796 draw ratio to draw draw ratio naturally be 2.580 undrawn yarn, draft temperature is 115 ℃, heat-treats according to the various conditions shown in the table 2 subsequently.The processing stability of heat-treating under these conditions is shown in table 2.Twist with Italian twisting mill through above-mentioned heat treated raw material thread, making its twist is 2500T/M, under 75 ℃ wet heat condition, twist with the fingers typing 30 minutes then, the thick and thin yarn that obtains is made the georgette fabric, carrying out alkali treatment then, to make its loss in weight be 15%, and the fabric intensity that is made into so also is shown in table 2
Table 2
Annotate:
*10: good
*: fine hair or broken fiber appear
*20: intensity is suitable for
*: intensity is inapplicable
Table 2 explanation is lower than 1.001 or when being higher than 1.040, the intensity of processing stability and fabric is all very poor when the heat treatment percentage elongation; And when treatment temperature was lower than vitrification point, resulting fabric intensity was low, even when the percentage elongation that is adopted during heat treatment can provide good processing stability, resulting fabric can not be practical; When heat treatment temperature was higher than crystallization temperature, processing stability and fabric intensity were all very poor.
A kind of fiber number was 500 dawn, and number of filaments is 96, and its double refractive inde △ n is 0.031, and its glass transition point is 71 ℃, and crystallization temperature is 130 ℃ the polyethylene terephthalate silk that does not stretch.Under the various conditions shown in the table 3, adopt stretching device shown in Figure 2 (it is 5.1～5.3 stretching roller that preparation has its surperficial sliding friction) to stretch.The raw material thread that makes is like this measured its characteristic through false twisting processing back, and measurement result is shown in table 3.
Table 3
Be included in according to the thickness joint fancy yarn of method of the present invention preparation and all show good processing stability when stretching, the product that is made by this thickness joint fancy yarn has anti-fragility in the following process operation, and effect is satisfactory in the practical application.
Fig. 1 is the enlarged drawing of monofilament in the multifilament of the present invention.
Fig. 2 represents to be used for the example of stretching device of the present invention.
Fig. 3 is the schematic diagram of surperficial sliding friction measurement mechanism.
Fig. 4 be a presentation surface sliding friction σ and Wu Site all spend (stage casing) (%) between the relation curve map.
Fig. 5 is the schematic diagram of a drawing point.
Fig. 6 is the enlarged drawing of monofilament in the multifilament of prior art.
Fig. 2, the implication of numeral in 3 and 5:
1 ... undrawn yarn,
2 ... feeding roller,
3 ... the stretching roller,
4 ... the stretching roller,
5 ... heating plate,
6 ... bobbin,
7 ... live-roller,
8 ... live-roller,
9 ... the test roller,
10 ... silk,
11 ... pony roll.
Claims (4)
1, a kind of process of producing polyester thick and thin yarn, it is characterized in that this method comprises that the polyester multifilament that will be not do not stretch stretches with the extensibility of the natural draw ratio that is not higher than this kind silk, the elongation at break of stretching the back silk is 70% or higher, the temperature range of employed stretching roller is no more than the crystallization temperature of used silk, its surperficial sliding friction is 4.0～6.0, make the silk after the stretching pass a heater then, percentage elongation with 1.001～1.040 is heat-treated, the temperature range of heater promptly is not less than the vitrification point of undrawn yarn, is not higher than its crystallization temperature again.
2, by the described method for preparing polyester thick and thin yarn of claim 1, the temperature of the roller that wherein stretches is at 70～140 ℃.Scope in.
3, by the described method for preparing the polyester thick and thin Fancy Yarns of claim 1, the scope of the elongation at break of silk was 75～90% after selected draw ratio made and stretches when wherein stretching.
4, by the described method for preparing polyester thick and thin yarn of claim 1, wherein heter temperature is in 100～140 ℃ scope.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP269406/84 | 1984-12-20 | ||
| JP59269406A JPH0694609B2 (en) | 1984-12-20 | 1984-12-20 | Method for producing polyester silk and thin yarn |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85109764A true CN85109764A (en) | 1986-08-13 |
| CN1006990B CN1006990B (en) | 1990-02-28 |
Family
ID=17471966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85109764A Expired CN1006990B (en) | 1984-12-20 | 1985-12-19 | Process for manufacture of polyester thick and thin yarn |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0694609B2 (en) |
| KR (1) | KR910007603B1 (en) |
| CN (1) | CN1006990B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513788A (en) * | 2016-06-16 | 2017-12-26 | 苏州力佳新型材料有限公司 | A kind of beautiful composite filament of fat or thin pleasure and its preparation technology |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU1731195A (en) * | 1994-01-27 | 1995-08-15 | Engelhard Corporation | Process for recovering catalyst supports |
| CN101560715B (en) * | 2008-04-17 | 2013-04-03 | 东丽纤维研究所（中国）有限公司 | Processing filament, manufacture method and application thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56159321A (en) * | 1980-05-12 | 1981-12-08 | Toyo Boseki | Production of special yarn |
| JPS57143515A (en) * | 1981-02-25 | 1982-09-04 | Toray Ind Inc | Production of thick and thin polyester multifilament yarn |
| JPS599211A (en) * | 1982-06-30 | 1984-01-18 | Toyobo Co Ltd | Thick and thin yarn and preparation thereof |
| JPS5915536A (en) * | 1982-07-14 | 1984-01-26 | 日本エステル株式会社 | Production of thick-thin yarn |
| JPS5976916A (en) * | 1982-10-21 | 1984-05-02 | Teijin Ltd | Method for drawing polyester fiber |
-
1984
- 1984-12-20 JP JP59269406A patent/JPH0694609B2/en not_active Expired - Lifetime
-
1985
- 1985-12-19 CN CN85109764A patent/CN1006990B/en not_active Expired
- 1985-12-19 KR KR1019850009582A patent/KR910007603B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107513788A (en) * | 2016-06-16 | 2017-12-26 | 苏州力佳新型材料有限公司 | A kind of beautiful composite filament of fat or thin pleasure and its preparation technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1006990B (en) | 1990-02-28 |
| JPS61146836A (en) | 1986-07-04 |
| KR860005066A (en) | 1986-07-18 |
| JPH0694609B2 (en) | 1994-11-24 |
| KR910007603B1 (en) | 1991-09-28 |
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