CN85103959A - Through improved continuous spinning and novel terylene interlacing yarn - Google Patents
Through improved continuous spinning and novel terylene interlacing yarn Download PDFInfo
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- CN85103959A CN85103959A CN85103959.6A CN85103959A CN85103959A CN 85103959 A CN85103959 A CN 85103959A CN 85103959 A CN85103959 A CN 85103959A CN 85103959 A CN85103959 A CN 85103959A
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Abstract
That the present invention discloses is lax by spinning, hot drawing-off, heat, network and batch a kind of continuation method of making the polyester cheese with low-shrinkage, makes yarn keep higher temperature, should carry out network with the air of heating, yarn intensity is reduced less and shrinkage factor low.
Description
The present invention is the relevant improved continuous spinning of producing the novel Polyester Yarns with low-shrinkage, has better balance between novel its intensity of terylene interlacing yarn and the residual shrinkage factor.More particularly, it is the continuous process that narration is made spinning that this novel yarn adopts, drawing-off, lax, network and batched.
Industrial (being high strength) terylene compound silk is for generally known.For example 3,216, No. 187 described large-scale production of United States Patent (USP) of Qian Teli (Chantry) and Mo Linni (molini) is also used about 20 years for commercial.In general, at about 800-2000 dawn of this industrial Polyester Yarns, relative viscosity is at least 35, is the Polyethylene Terephthalates, and it is different with apparel yarn, and apparel yarn dawn number and relative viscosity are lower, thereby brute force is also low.Aspect some purposes, usually needing through relaxation processes be heat treatment, the hot stretched yarn of overfeeding just, and during heating treatment control shrinkage factor, thus reduce the residual shrinkage factor of yarn.No. the 3rd, 413,797, the United States Patent (USP) of Cha Puman (Chapman) has wherein disclosed a kind of two step spin processes that yarn relaxed with minuent twisting.The more economical method of commercial use is about to spinning, the drawing-off before yarn is wound into bobbin, the steps such as reaching network that relaxes connects into a series-operation.Typical network method is disclosed in the United States Patent (USP) the 2nd, 985,995 and 3,110 of this court of a feudal ruler (Bunting) and Gunnar Nilsson (Nelson), No. 151.It uses aerojet, and yarn is entwined increases cohesive force and its bulking intensity of unlikely appreciable impact.Be the opinion of economy, this network spray nozzle is at room temperature produced, but this kind continuation method also fails to predict the effect of using hot-air to obtain.
Therefore, now known available continuation method and made the lower indusrial polyester yarn of shrinkage factor, it equals in the continuous process,, network lax through spinning, hot drawing-off, heat and be wound into bobbin.With changing relaxation condition, the quality of resultant yarn is adjusted in the limited scope.For example, between relaxation period, increase overfeed ratio, can make yarn, but this still can cause powerful and the significant unfavorable reduction of modulus so far with low-residual shrinkage factor.For a long time, what wish is that residual shrinkage factor reduces always, and intensity does not significantly reduce.This has been disclosed in the United States Patent (USP) the 4th, 251, No. 481 and the 4th, 349, No. 501 of Han Lin (Hamlyn).These documents have confirmed with spinning, drawing-off, lax, network and have batched that the series-operation production that is formed by connecting has good contraction and the difficult course of the industrial Polyester Yarns institute warp of damage strength not.
Intensity and low-shrinkage be preferable to combine industrial Polyester Yarns, can be made by two step method at present, and this is comparatively ancient two step method.Drawing-off, lax and batch is again carried out in elder generation's spinning and batch and form a bobbin then in another process.This two step method is very uneconomical, and the quality of yarn is still needed in some aspects and improved.
The objective of the invention is to adopt the continuous spinning of conventional economy that the novel terylene network industries yarn of better quality balance is provided, just high strength (it is too many that intensity should be not less than for 8 gram/dawn) and low residual shrinkage factor (should be no more than 3.5%, and it being also very important to have a low shrink tension).Another object of the present invention provides improving one's methods of continuous processing and produces industrial yarn.
The present invention still provides some other technology.
The inventor has found with the hot-air network effect good, and residual shrinkage factor can reduce, and unlikely generation such as the preceding mention phenomenon that generation intensity reduces significantly when spraying with cold (room temperature) air network.
Although the present invention is not bound by any theory, key is to avoid hot yarn cooling.That is, make the hot yarn of this kind in critical-temperature, keep time enough, help the well balanced of yarn quality, this part is given detailed description later on again.Can obtain preferable quality like this.Do not allow the yarn that firm warp is lax to be cooled to room temperature, and then cold yarn is given heat again.
Therefore, the invention provides a kind of modification method that has the high tenacity polyester fiber yarn of low-shrinkage in order to production, its step is with the polymer of the fusion of viscosity higher (terephthalic acids-glycol ester) spinning in addition, to form multifilament, then yarn is sent into and drawing-off at high temperature, to increase its intensity, following step is with the yarn heating, and reduces its shrinkage factor in the overfeeding mode.It comprises yarn network and produces the process of cohesive force, will be equivalent to about 1650 meters/minute speed through the yarn of the network speed with at least 1800 yards/minutes again, is wound into bobbin in a continuous manner.The temperature maintenance that the characteristics of its improvement part are to make yarn is about more than 90 degrees centigrade, and is advisable with about 90-160 degree centigrade, till yarn is rolled into bobbin fully.
It is to be advisable and to carry out network with adding the about 90-200 of hot-air-temperature ° degree centigrade that the inventor has found to make character to reach this improved straightforward procedure.Avoid making its cooling before yarn enters coiling, by using really blanking method decide, also available other modes make yarn maintain the state of heat, and to obtain the purpose of reduction shrinkage factor, and be unlikely intensity are excessively reduced.
The present invention also provides a kind of poly-terephthalic acids-glycol ester network industries yarn, and its relative viscosity has high strength and low shrinkage factor at least about 35.Record dry-hot shrinkage DHS
177(recording at 177 degrees centigrade) is about 3.5% or lower, and with about 3.2% or lower being advisable, and dry-hot shrinkage DHS
140(recording at 140 degrees centigrade) is approximately 2.0% or lower, preferably about 1.6% or lower being advisable, shrink tension ST
140(recording at 140 ℃) is about the 0.03 gram/dawn or lower, best 0.02 gram/dawn or lower being advisable, the percentage elongation E that intensity is at least about 7.7 gram/dawn and records under the load at 2.3 gram/dawn
5Be no more than about 10%.This yarn shrinkage is (routine DHS very evenly
177) standard deviation is little.Preferably be about 0.30 or lower being advisable, particularly 0.20 or lower for well.In fact, only be difficult for making without further processing and have the satisfied anti-Zhang Xingzhi and the yarn of low-shrinkage more with described continuation method, the therefore yarn of making by this continuation method, its shrinkage factor can be higher than following minimum of a value: DHS usually
177Be 2.0%.DHS
140Be 1.0%, and ST
140It was 0.01 gram/dawn.Equally, resist a limit value to be: about 8.5 gram/dawn of maximum intensity and minimum E
5Be worth about 8%.
The continuous spinning of the routine of the terylene interlacing yarn that Fig. 1 illustration manufacture is used can improve by the present invention.
Fig. 2 and Fig. 3 are used for the diagram of illustrated example.
With reference to Fig. 1, terylene thread 1 is to be formed by spinnerets 2 molten spinning.Solidify during by spinning tube 3 when it, form the not multifilament 4 of traction, and guide to draw zone by feeding roller 5, its speed decides spinning speed, and spinning speed promptly refers to extract out the speed of solid-state silk in spinning process.Undrafting wire 4 is by heater 6, and carries out drawing-off by the carry-over pinch rolls 8 and 9 of identical speed rotation and become stretched yarn 7, and the speed of these two rollers is than feeding roller 5 height.Draw ratio is meant the ratio of speed with the speed of feeding roller 5 of carry-over pinch rolls 8 and 9, usually between 4.7～6.4 times.Stretched yarn repeats to produce heat setting like this by carry-over pinch rolls 8 and 9 in baking oven 10.The yarn 11 that forms produces network when passing network injector head 12, and forms interlacing yarn 13, delivers to take up roll 14 then, and the formation cheese of reeling.Yarn 11 is delivered to take up roll 14 in the overfeeding mode, and promptly the speed of take up roll 14 is less than roller 9 and 8 speed thereby produce lax.Finishing agent adds in the usual way, shows among the figure, is added in usually between the non-draft yarn 4 of feeding roller 5 fronts and heater 6 and the baking oven 10 on the stretched yarn 7.Arrive this, the continuous spinning of routine is set forth.Before, the air of using for network is that cold air promptly is a room temperature, therefore when yarn 11 leaves baking oven 10 with higher temperature, the air that is ejected by network spray nozzle 12 cools off fast, so, the temperature of interlacing yarn 13 is markedly inferior to yarn 11, and that is not wound into bobbin than just low through yarn 11 temperature of baking oven 10 by interlacing yarn 13.
Yet this conventional method improves in the present invention, and the temperature that makes yarn 13 keep raising is reeled.The most handy hot-air in the network spray nozzle 12 so as not to yarn 11 cooled off.Keep higher temperature before making 13 one-tenth bobbins of interlacing yarn like this.Definite temperature requirement will change with special technology and operative installations.From being relaxed to the passage of yarn between batching with closed, to avoid or to reduce the cooling effect of atmospheric air.
Though the present invention is not limited by any particular theory, must when leaving heat treatment oven, yarn should avoid or reduce suffered cooling, and to lax useful, shrinkage factor also reduces so like this, does not reappear common intensity and reduces phenomenon.This may be because the lax yarn of process is maintained at higher temperature at this section in the period always, and makes crystallization continue to carry out, thereby makes crystal grain become big.May cause aligning poor (it can lower intensity and modulus) by above-mentioned as overfeeding excessive between relaxation period.Therefore, high-temperature duration is the same quite important with actual temperature, and definite critical value decide by the character of polymerization yarn, by the relative viscosity of polymer and thread process velocity, be meant the speed of spinning especially and decide.What this just may be interpreted as with the reason place of the not too economic resultant high strength of two step method with the yarn of low-shrinkage better balance, and two step method is carried out under lower speed usually, relax and batch between without network development process.
Other continuation mode of equilibrium ratio between the various character of the present invention is better, can tentatively be understood from following example.
Example 1 is that to adopt roughly with aforementioned identical method shown in Figure 1 and 1000 dawn 140 of device (except the item B) hole relative viscosity be several yarns of 37, and their adopt carry-over pinch rolls speed is 3100 yards/minute, but uses different relax level and different winding speeds.Various character are measured according to following method, and are shown in table 1.Processing main difference is following several respects:
A is conventional processing method, supply heater 6 usefulness with 360 ℃ steam jets, the draw ratio that carry-over pinch rolls 8 and feeding roller are 5 is 5.9, in baking oven 10, roller 8 and 9 is heated to 240 ℃, between roller 9 and work beam 14 with 9.1% overfeeding, be that coiling speed is 2820 yards/minute, 50 pounds of/square English inch of nozzle 12 working pressures and room temperature (about 30 ℃) are used for the network air.Anti-Zhang Xingzhi as shown in table 1 is fabulous, but shrinkage factor (DHS) and shrink tension are above requiring limit.
B is the commerce yarn of being made by the competitor, so manufacture process craft is unknown.Table 1 shows that its shrinkage factor and shrink tension are markedly inferior to A, but the expense height, and intensity aspect ratio requires much lower.
C is to use the method that reduces shrinkage factor in the article, and it and A difference are that carry-over pinch rolls 9 and 14 over feed rate(OFR)s of work beam are 13.5%, so winding speed is 2680 yards/minute (about 2450 meters/minute).Excessively entwine for avoiding silk to produce, be kept to 45 yards/square English inch at this pressure, and nozzle is revised slightly the network air.As shown in table 1, this kind improves not reduction and close with item B of intensity.Intensity still maintains desired high level.Yet shrinkage factor and shrink tension are not reduced to the degree of item B.
D also belongs to similar situation, but it uses bigger overfeed ratio between roller 9 and work beam 14, and the speed of promptly reeling is 2600 yards/minute (about 2375 meters/minute), therefore shrinkage factor and shrink tension is significantly reduced, but shortcoming is the low of strength ratio requirement, promptly less than 7.5 gram/dawn.
Must be noted that as shown in Figure 2 sample yarn A, C and D are improving process spinning, the resultant result of drawing-off under the overfeed ratio situation, promptly intensity and shrinkage factor also reduce roughly linear.Previous employing mode can't make intensity reach for 8 gram/dawn and shrinkage factor is no more than 3.5%, can not obtain Ideal Match.More than afore-mentioned test is compared, but do not compare with the present invention.
E is meant the present invention, and it is similar to C, but the injection air in nozzle 12 is heated to 160 degrees centigrade.The yarn that generates obviously has optimum balance between shrinkage factor and intensity.Detailed as shown in table 1.Intensity is significantly than B and D height, and listed shrinkage factor DHS in the table 1
140And shrink tension ST
140Belong to minimum of a value.
Low dawn yarn also can obtain similar character, shown in following example.
It is that 2600 yards/minute (about 2375 meters/minute) and winding speed are that 2250 yards/minute (about 2055 meters/minute) others and E same procedure made for 500 dawn that example 2 adopts the speed of carry-over pinch rolls, and 100 hole relative viscosities are 37 yarn.As shown in table 2, yarn (F) has good shrinkage factor and shrink tension, and is the same with the character of E.
(table 1, table 2 vide infra)
Wonderful discovery, technology are changed a little just can reach desired index, not fairly obvious in view of the cooling that is caused by injection air, facts have proved also like this.After carrying out network with 30 degrees centigrade of air, the yarn that is wound on the bobbin is measured temperature, can find that this temperature is about 83 degrees centigrade.And stop its temperature of the made yarn of injection air is 93 degrees centigrade, finds that this yarn has the desirable balance of high strength and two kinds of character of low-shrinkage (because there is not network, not having cohesive force).Its temperature of air that network uses changes between 100 and 200 degrees centigrade, and the unlikely obvious character that influences interlacing yarn.
Heat-treatment temperature range (heating after the drawing-off in baking oven 10) should be advisable with 235～255 degrees centigrade at 200～260 degrees centigrade.Over feed rate(OFR) (between roller 9 and work beam 14) should about 10-15% between.Definite numerical value can be according to distinctive polymer and process conditions in advance with preferably.Shown in example 1, in network development process, may need to do some little adjustment, for example reduce air pressure, and nozzle is improved.Make the yarn of generation have best quality and under high over feed rate(OFR) situation, reduce the phenomenon of excessively entwining, any fracture of wire phenomenon that minimizing may cause especially as far as possible.
Yarn of the present invention is this surprised combination that has desirable low-shrinkage and do not reduce intensity significantly.Show a sharp contrast with other example, as shown in Figure 2.The present invention represents that sample E and F depart from sample AC and the D straight line is far away.
Observe the significant difference of shrink tension as can be known from Fig. 3, it represents sample A, B and E
Shrink tension and the relation of temperature.When industrial dacron when carrying out hot coating for 140 degrees centigrade, low shrink tension is extremely important.Under this temperature, can see that B is in different slopes and position with the E curve, and under higher temperature (as 200 degrees centigrade), its value is then quite approaching.This figure shrink tension peak value difference is less, thereby makes and to be difficult to distinguish sample B and E real difference on performance in the commercial utilization.
The inventor finds, compares with preceding used commercial yarn, and sample E has fabulous even shrinkage factor (DHS
177).The feature of sample A is (DHS
177) standard deviation (SD) be 0.33 and be considered as always fairly good.Get 90 bobbins from sample E, its standard deviation only is 0.17, and this is illustrated in the uniformity aspect and has obtained surprised improvement, and confirms the practical value of highly significant.
Sample E can waltz through the conventional processing of weaving, but the heat supply coating process is as the fabric of coating.This kind coated fabric is if compare with the sample A and the B coated fabric of the processing of preceding technology, and it seems wideer, more smooth (less fracture of wire) and wrinkle resistant.This is that desired key character is gone up in commercial utilization, because its production of woven fabric height can obtain higher view picture top-quality product rate.
The flex life of sample E (recording according to standard method) is usually than sample A or sample B height, and can believe that the commercial yarn that makes than two step method is also high.
All temperature are all degree centigrade to be.
Brute force is to record on 1122 type Instron tensile testers, and it is that yarn sample speed with 12 inch/minute (30 centimeters/minute) under 25 degree temperature Celsius that 10 inch (25 centimetres) are long is stretched to its breakaway poing.Elongation and fracture load all automatically are recorded on the stress-strain drawing.Brute force is that the gram number with fracture load gets divided by initial DENIER.E
BElongation when being illustrated in fracture.E
5Be illustrated in the percentage elongation under the load of 2.3 gram/dawn (be equivalent to 5 ft lbfs and act on 1000 dawn yarns), can obtain by stress one strain figure.E
5Be yarn modulus simple determination mode, be illustrated in and be subjected under the load effect the anti-extensibility of yarn in the common process.
Dry-hot shrinkage is the yarn with certain-length, is under zero the situation at tension force, indicated temperature (
177Degree centigrade be DHS
177, 140 degrees centigrade is DHS
140) baking oven in keep 30 minutes after, measure its length variations again and get.Shrinkage factor is to represent with the percentage of initial length.DHS
177Major part is used for the mensuration of industrial yarn.But the inventor finds to use DHS
140More can definitely represent the shrinkage phenomenon that industrial yarn takes place in actual coating processing.Yet it is also different by its condition determination of different patented methods.
Standard deviation (SD) is a statistical term commonly used, and it is defined as the positive square root value of variance.Variance is the quadratic sum of the difference of indivedual measured values and average of samples, subtracts 1 divided by measuring number.
Shrink tension (ST) is with UL is housed
4-0.5 type Si Telahan load transducer and UC
3The shrink tension temperature spectrometer of the universal infrared sensor of type Si Telahan is measured, and clamps the yarn of fixed length by 10 cm coil, and initial load was 0.005 gram/dawn, in baking oven with 30 degree Celsius/minute the condition that heats of speed under record.Draw figure shown in each curve among Fig. 3 like this, the shrink tension value can by the requirement temperature read.
Nexus is to detect its network distance by Luo Shi node tester, with a centimetre expression.With instrument a fine needle is passed terylene thread.Terylene thread speed tracting with 480 centimeters/minute under 10 gram tension force passes through this pin then.When the node of network was run into by pin, the tension force of yarn can increase, and when each yarn tension increased to greater than 30 grams, this point promptly was designated as a nexus.Write down the distance between each nexus, with a centimetre expression.10 range averagings are the network distance.
Herein the mensuration of any relative viscosity (RV) of indication be polymer weight 4.47 percent in contain the viscosity ratio between two of the hexafluoroisopropanol solution viscosity and the solvent (at 25 degrees centigrade) of 100/1000000ths sulfuric acid.When using this kind solvent, its relative viscosity that has is at least 35 to previous industrial yarn (as United States Patent (USP) the 3rd, 216, No. 817 those disclosed herein).
In addition, can see that technology of the present invention can favourablely apply to the terylene weaving yarn of lower relative viscosity.To obtain novel terylene thread with improved properties.Although also there is additive method can make the low-shrinkage yarn, also need improve it in commercial very important uniformity.Therefore, the invention provides a kind of modified continuation method of Polyester Yarns of production drawing-off network, its step is that the polymer of fusion (terephthalic acids-glycol ester) spinning is formed compound silk, drawing-off under heated condition, increase its intensity, again stretched yarn is heated, overfeeding is to reduce its contraction, comprise this moment and make yarn network to produce the process of cohesive force, and the interlacing yarn of drawing-off batched with at least 1650 meters/minutes speed to form a bobbin be a continuous process, the feature of improvement part is that temperature maintenance with yarn is more than 90 degrees centigrade, till all being wound into bobbin.Suitable dawn number was 100 to 2000 dawn.
Claims (10)
1, production has a kind of improved continuation method of the high-intensity Polyester Yarns of low-shrinkage, the step that comprises is: the molten polymer that relative viscosity is high (terephthalic acids monoethylene glycol ester) spinning forms compound silk, improving temperature then carries out drawing-off yarn intensity is improved, following step is to reduce its shrinkage factor with yarn heating and overfeeding, it comprises that one makes the step of yarn network produce cohesive force, to batch with at least 1650 meters/minutes speed through the yarn of network again, form bobbin with continuous processing, the feature of improvement part is that temperature maintenance with yarn is about more than 90 degrees centigrade, till yarn all is rolled into bobbin.
2, preparation is through a kind of modified continuation method of the network Polyester Yarns of drawing-off, and the step that comprises is spun into compound silk for the polymer (terephthalic acids-glycol ester) with molten state, and drawing-off at high temperature increases yarn intensity.To reduce its shrinkage factor through the yarn heating of drawing-off and with overfeeding, comprise that a step that makes yarn network is to produce the cohesive force phenomenon.To be batched with at least 1650 meters/minutes speed through the interlacing yarn of drawing-off, form bobbin with continuation method, the feature of improvement part is to make yarn keep about temperature more than 90 degrees centigrade, till yarn all is rolled into bobbin.
3,, it is characterized in that using hot-air to make yarn be maintained at high temperature for network according to the method for claim 1 or 2.
4,, it is characterized in that air heat is in 90-200 degree centigrade of scope according to the method for claim 3.
5, according to each method in the previous claim 1～4, it is characterized in that: the yarn enclosed channel, be rolled into bobbin up to it, minimizing is subjected to atmospheric effect and cools off, and makes yarn be maintained at higher temperature.
6, according to each method of claim 1～5, it is characterized in that the carry-over pinch rolls temperature maintenance at about 200-260 degree centigrade, heat after making the yarn drawing-off.
7, according to the method for claim 6, it is characterized in that: wherein make roller be maintained at 235～255 Celsius temperatures.
8, according to each method of claim 1～7, it is characterized in that, yarn is maintained in about 90～160 degrees centigrade of scopes, till yarn is rolled into bobbin fully.
9, according to each method of claim 1～8, it is characterized in that, is that yarn is with about 10～15% overfeedings.
10, according to each continuation method of claim 1-9, it is characterized in that: the method is a kind of continuation method of high tenacity polyester fiber yarn with low-shrinkage of producing about 800-2000 dawn scope, its step that comprises is relative viscosity to be at least 35 molten polymer (terephthalic acids-glycol ester) spinning, draw ratio with 4.7～6.4 is with yarn drawing-off in addition, and add finishing agent, yarn is heated on about 200-260 degree centigrade roller in temperature maintenance, with the charging of about 10-15% overfeed ratio, it is lax that yarn is produced, utilizing temperature is that 90～200 degrees centigrade air makes yarn produce network, again yarn is batched, yarn is cooled to below 90 degrees centigrade, till it all is rolled into bobbin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103959.6A CN1005342B (en) | 1985-05-23 | 1985-05-23 | Continuous spinning process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85103959.6A CN1005342B (en) | 1985-05-23 | 1985-05-23 | Continuous spinning process |
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| Publication Number | Publication Date |
|---|---|
| CN85103959A true CN85103959A (en) | 1987-01-14 |
| CN1005342B CN1005342B (en) | 1989-10-04 |
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| CN85103959.6A Expired CN1005342B (en) | 1985-05-23 | 1985-05-23 | Continuous spinning process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908275A (en) * | 2016-06-29 | 2016-08-31 | 浙江尤夫高新纤维股份有限公司 | Method for producing fine-denier and low-shrinkage polyester industrial fiber by using fine-denier and high-strength spinning equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427651C (en) * | 2006-07-28 | 2008-10-22 | 施建强 | Preparation technology of ultralow contraction terylene industry long filament |
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1985
- 1985-05-23 CN CN85103959.6A patent/CN1005342B/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105908275A (en) * | 2016-06-29 | 2016-08-31 | 浙江尤夫高新纤维股份有限公司 | Method for producing fine-denier and low-shrinkage polyester industrial fiber by using fine-denier and high-strength spinning equipment |
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| CN1005342B (en) | 1989-10-04 |
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