CN117867671A - Method for improving POY tail passing success rate - Google Patents
Method for improving POY tail passing success rate Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 50
- 239000008041 oiling agent Substances 0.000 claims abstract description 42
- 238000004804 winding Methods 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 230000032050 esterification Effects 0.000 claims abstract description 4
- 238000005886 esterification reaction Methods 0.000 claims abstract description 4
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 238000006068 polycondensation reaction Methods 0.000 claims abstract description 4
- 238000002360 preparation method Methods 0.000 claims abstract description 4
- 239000002002 slurry Substances 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 137
- 238000009987 spinning Methods 0.000 claims description 96
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 claims description 27
- 239000004094 surface-active agent Substances 0.000 claims description 19
- 239000003795 chemical substances by application Substances 0.000 claims description 15
- 238000005086 pumping Methods 0.000 claims description 15
- 239000010779 crude oil Substances 0.000 claims description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- -1 polyoxyethylene Polymers 0.000 claims description 12
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims description 11
- 239000002736 nonionic surfactant Substances 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 230000002335 preservative effect Effects 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 6
- 239000003755 preservative agent Substances 0.000 claims description 6
- 238000010924 continuous production Methods 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 2
- 239000010410 layer Substances 0.000 description 48
- 238000004519 manufacturing process Methods 0.000 description 23
- 239000000047 product Substances 0.000 description 19
- 229920000728 polyester Polymers 0.000 description 12
- 239000003292 glue Substances 0.000 description 9
- 239000000243 solution Substances 0.000 description 8
- 239000011259 mixed solution Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 238000012805 post-processing Methods 0.000 description 5
- 239000002344 surface layer Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 238000004939 coking Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
Abstract
The invention discloses a method for improving POY tail passing success rate, which is characterized by comprising the following steps: the POY yarn cake is prepared by slurry preparation, esterification, polycondensation, metering, spinneret plate melt extrusion, cooling, oiling and winding, and when the POY yarn is spun, the oil content of POY bottom yarn with the initial length of 0-1000 m and POY surface yarn with the final length of 1000m of each POY yarn cake is increased by 8-15%, and the oil content of POY yarn in the middle part is unchanged. Can solve the problem of high tail breakage rate caused by the decrease of the cohesion of the filament bundle and the adhesion of the bottom filaments after the volatilization of the oiling agent.
Description
Technical Field
The invention relates to the technical field of textile technology, in particular to a method for improving POY tail passing success rate.
Background
The polyester pre-oriented yarn is also called polyester Partially Oriented Yarn (POY), and is a nascent yarn obtained by high-speed spinning (the spinning speed is 2800-3600 m/min). Compared with the common polyester drawn yarn, the polyester drawn yarn has low orientation degree and low crystallinity, and the physical indexes of the polyester drawn yarn in POY are low breaking strength, high breaking elongation, poor dimensional stability and the like. Therefore, the stretch textured yarn (DTY) prepared by the processes of stretching, false twist texturing, shaping and the like has certain physical and mechanical properties, and meets the requirement of subsequent weaving. The breakage rate in the POY DTY processing process directly affects the production efficiency of post-processing and the superior product rate of products. Through investigation, in the broken end rate in the POY processing process, the ratio of the tail passing broken end is more than 70%. The tail passing is a process of connecting the tail fiber of one POY yarn bobbin with the surface yarn head of the other POY yarn bobbin when the polyester pre-oriented yarn is continuously processed into the polyester low stretch yarn.
There are many factors that affect the draw-over rate, such as POY product quality, paper tube quality, equipment factors, end quality, etc. On the premise of ensuring the normal external factors such as equipment, paper tubes and the like, the POY tows have better cohesion, which is beneficial to the improvement of the DTY tailing passing rate. Thus, patent CN 112746363 improves the cohesiveness of the tow by providing the POY bottom filaments with network points, thereby reducing bottom over-tailing. However, because network points exist in 6000 m of the bottom layer yarns, stiff yarn tightening points are easily generated during post-processing false twisting deformation, and quality problems such as hidden strips on the cloth surface are further generated. Meanwhile, there is also a biggest problem in that: the oiling agent of the bottom layer silk and the surface silk can have a volatilization problem, and then the cohesion of the silk bundle can be influenced, so that the problem of tail breakage is caused, although the cohesion of post-processing of the silk bundle can be improved by improving the oiling rate of the POY silk bundle, the maintenance period of a DTY hot box can be shortened easily due to the fact that the oiling rate of the POY silk bundle is too high, and the problem that the oiling upper limit of the POY silk is improved is limited. Meanwhile, the quality of bottom-layer wires and surface wires of the POY wires plays a vital role in tail passing success rate, and at present, the POY stock is high, and after storage for a plurality of months, the POY surface wire oil is volatilized more, so that the cohesion of the wire bundles is reduced. In addition, the POY bottom layer wires are extruded for a long time, about 90% of water in the POY oiling agent permeates into the paper tube, and the water melts the solidified glue of the parchment on the surface of the paper tube, so that part of the bottom layer wires are adhered with the glue, and the bottom layer wires are torn off when the POY passes the tail, so that the tail passing rate is affected.
Disclosure of Invention
In order to solve certain or some technical problems in the prior art, the purpose of the application is to provide a method for improving the tail passing success rate of POY, which can solve the problem that the tail passing end breakage rate is high due to the reduction of the cohesion of the filament bundle and the adhesion of the bottom filament after the volatilization of the oiling agent.
In order to solve the above-mentioned existing technical problem, this application adopts following technical scheme to realize:
the POY cake is prepared by slurry preparation, esterification, polycondensation, metering, spinneret plate melt extrusion, cooling, oiling and winding, and when the POY is spun, the oil content of POY bottom layer yarns with the initial length of 0-1000 m and POY surface yarns with the final length of 1000m of each POY cake is increased by 8-15%, and the oil content of POY yarns in the middle part is unchanged.
Preferably, the method for oiling the surface yarn 1000m inner yarn bundles and the bottom yarn 1000m inner yarn bundles of the yarn cake comprises the following steps:
step 1, firstly calculating full-winding time T1 of a doffing yarn, wherein T1=winding weight 10000/specification spinning speed;
step 2, calculating the time T2 required by the oiling process of 1000 meters of tows, wherein T2=1000 meters/spinning speed;
step 3, setting the oil outlet frequency of an oiling agent pump in the oiling process to improve the oil content in the passing filament bundles, wherein the oil outlet frequency of the oiling agent pump is increased by the time of T2 of the bottom layer of a first spinning cake, T1-T2 of the surface filaments of the first spinning cake, T1+T2 of the bottom filaments of a second spinning cake and the like after the spinning head is regenerated;
step 4, automatically controlling the oil pumping frequency of the oiling agent to increase according to the time T2 required by the oiling process, so that the oil content of tows passing through the time T2 is increased, and oiling is carried out on tows in 1000 meters of the bottom layer of the first spinning cake after the new spinning head;
step 5, calculating oil pumping-out frequency increasing time required by oil pumping out of the surface yarn 1000m of the first spinning cake after the head is regenerated and oil pumping-out frequency increasing time required by oil pumping out of the yarn 1000m of the bottom layer yarn of the second spinning cake according to the time T1-T2 to T1+ T2, and automatically controlling the frequency of an oil pumping-out agent pumping-out pump to oil the surface yarn 1000m of the first spinning cake after the head is regenerated and the oil pumping-out frequency increasing time required by oil pumping out of the yarn 1000m of the bottom layer yarn of the second spinning cake during the time T1-T2 to T1+ T2;
step 6, calculating the oil pumping-out frequency increasing time required by the oil pumping-out of the tows in the 1000m of the surface of the second spinning cake after the head is rebuilt and the oil pumping-out frequency increasing time required by the oil pumping-out of the tows in the bottom layer of the third spinning cake 1000 according to the time from 2 to 1 to 2 to 1+T2, and carrying out oil pumping-out on the tows in the 1000m of the surface of the second spinning cake and the tows in the bottom layer of the third spinning cake 1000 after the head is rebuilt by automatically controlling the frequency of the oil pumping-out pump during the time from 2 to 1 to 2;
step 7, performing the same calculation, namely calculating the oil pumping-out frequency increasing time required by the oiling of the tows in the 1000m of the surface of the Nth spinning cake after the head is rebuilt and the oil pumping-out frequency increasing time required by the oiling of the tows in the bottom layer of the silk 1000 of the Nth spinning cake according to the calculation method of N1-T2 to N1 + T2, and then performing the oiling of the tows in the 1000m of the surface of the Nth spinning cake and the tows in the bottom layer of the Nth spinning cake after the head is rebuilt by automatically controlling the frequency of the oiling agent pumping during the time of N1-T2 to N1 + T2.
Preferably, the processing method for the spinning cake after stopping in the continuous production process comprises the following steps:
step 1, turning off an oiling agent pump and treating related problems;
and 2, restarting the oiling agent pump, and then recalculating the oil outlet frequency increasing time of the oiling agent pump according to the oiling method of the tows within 1000 meters on the surface of the spinning cake and the tows within 1000 meters on the bottom spinning cake and automatically controlling the oiling agent pump.
Preferably, the oil content of POY bottom layer yarns with the initial length of 0-1000 m and POY surface yarns with the final length of 1000m of each POY spinning cake is increased by 8-12%.
According to the invention, the oil content of POY bottom layer wires with the initial length of 0-1000 m and POY surface wires with the final length of 1000m is increased by 8-12%, so that the problem that even after the surface wires volatilize and the bottom layer wire paper tube absorbs oil, the bottom layer oil content is high can be solved, the cohesion of the wire bundles is not reduced, and the tail passing rate is improved. Meanwhile, the oil output is automatically controlled by increasing the time through the oiling agent pump, and the oil output can be flexibly adjusted according to different varieties and surface wires and bottom wires with different lengths, so that the cohesion of the bottom wires and the surface wires is improved, and the spring-adding tail passing rate is improved.
Preferably, the oil agent mixed solution in the oiling process comprises crude oil, fluorocarbon surfactant, deionized water and preservative, and the crude oil is diluted to form the mixed oil agent with the oil concentration of 8-15%.
Preferably, the content of the preservative is 0.5-1%.
Preferably, the fluorocarbon content of the mixed oil solution is 10.5-13.5 wt%.
Preferably, a polyoxyethylene nonionic surfactant is also added to the mixed oil.
Compared with the prior art, the invention has the beneficial effects that:
(1) For the cake with the paper tube outer diameter of 125mm, the oil content of POY bottom layer yarn with the initial length of 0-1000 m and POY surface yarn with the final length of 1000m of the cake is increased by 8-15%, the middle area is kept unchanged, 1000m is equivalent to the paper tube winding of 255 circles to cover the bottom paper tube, the oil content of the whole cake is not affected, the oil content of the bottom layer is higher even after the surface yarn of the cake volatilizes and the bottom layer yarn paper tube absorbs oil, the cohesion of the yarn bundle is not reduced, the elasticized tail passing rate of the obtained POY yarn produced at present is more than 96%, the elasticized tail passing rate of the POY yarn stored for three months is more than 95.5%, and the tail passing rate is further improved.
(2) According to the invention, only the oil content of the bottom layer 1000m and the surface layer 1000m is increased, the coking condition of the DTY heating box is not influenced, so that the problem of reduced cohesion of tows caused by volatilization of the oil solution of bottom layer yarns and surface yarns can be avoided when the POY passes the tail, and the effect of low end breakage after passing the tail is ensured.
(3) The crude oil used in the invention contains fluorocarbon surfactant, which solves the problems that the bottom layer wire melts the glue on the paper tube to generate adhesion and cause tail end breakage.
Detailed Description
The present application will be further described with reference to the specific embodiments, and it should be noted that, on the premise of no conflict, new embodiments may be formed by any combination of the embodiments or technical features described below.
In the description of the present application, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate orientations or positional relationships, and are merely used for convenience in describing and simplifying the description, and do not indicate or imply that the devices or elements being referred to must have a particular orientation, be configured and operated in a particular orientation, and thus should not be construed as limiting the present application.
The terms "first," "second," and the like in this application are used for distinguishing between similar objects and not for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged where appropriate so that embodiments of the present application may be practiced in sequences other than those described herein, and that the objects identified by "first," "second," etc. are generally of a type and do not limit the number of objects, e.g., the first object may be one or more. Furthermore, in the description and claims, "and/or" means at least one of the connected objects, and the character "/", generally means that the associated object is an "or" relationship.
The method for improving the POY tailing passing success rate comprises POY spinning cakes, wherein the POY spinning cakes are prepared by slurry preparation, esterification, polycondensation, metering, spinneret plate melt extrusion, cooling, oiling and winding, and when the POY spinning is used for spinning POY, the oil content of POY bottom layer yarns with the initial length of 0-1000 m and POY surface yarns with the final length of 1000m of each POY spinning cake is increased by 8-15%, and the oil content of POY yarns in the middle part is unchanged; the method for oiling the surface yarn bundles of 1000 meters and the bottom yarn bundles of 1000 meters of the spinning cake comprises the following steps:
step 1, firstly calculating full-winding time T1 of a doffing yarn, wherein T1=winding weight 10000/specification spinning speed;
step 2, calculating the time T2 required by the oiling process of 1000 meters of tows, wherein T2=1000 meters/spinning speed;
step 3, setting the oil outlet frequency of an oiling agent pump in the oiling process to improve the oil content in the passing filament bundles, wherein the oil outlet frequency of the oiling agent pump is increased by the time of T2 of the bottom layer of a first spinning cake, T1-T2 of the surface filaments of the first spinning cake, T1+T2 of the bottom filaments of a second spinning cake and the like after the spinning head is regenerated;
step 4, automatically controlling the oil pumping frequency of the oiling agent to increase according to the time T2 required by the oiling process, so that the oil content of tows passing through the time T2 is increased, and oiling is carried out on tows in 1000 meters of the bottom layer of the first spinning cake after the new spinning head;
step 5, calculating oil pumping-out frequency increasing time required by oil pumping out of the surface yarn 1000m of the first spinning cake after the head is regenerated and oil pumping-out frequency increasing time required by oil pumping out of the yarn 1000m of the bottom layer yarn of the second spinning cake according to the time T1-T2 to T1+ T2, and automatically controlling the frequency of an oil pumping-out agent pumping-out pump to oil the surface yarn 1000m of the first spinning cake after the head is regenerated and the oil pumping-out frequency increasing time required by oil pumping out of the yarn 1000m of the bottom layer yarn of the second spinning cake during the time T1-T2 to T1+ T2;
step 6, calculating the oil pumping-out frequency increasing time required by the oil pumping-out of the tows in the 1000m of the surface of the second spinning cake after the head is rebuilt and the oil pumping-out frequency increasing time required by the oil pumping-out of the tows in the bottom layer of the third spinning cake 1000 according to the time from 2 to 1 to 2 to 1+T2, and carrying out oil pumping-out on the tows in the 1000m of the surface of the second spinning cake and the tows in the bottom layer of the third spinning cake 1000 after the head is rebuilt by automatically controlling the frequency of the oil pumping-out pump during the time from 2 to 1 to 2;
step 7, performing the same calculation, namely calculating the oil pumping-out frequency increasing time required by the oiling of the tows in the 1000m of the surface of the Nth spinning cake after the head is rebuilt and the oil pumping-out frequency increasing time required by the oiling of the tows in the bottom layer of the silk 1000 of the Nth spinning cake according to the calculation method of N1-T2 to N1 + T2, and then performing the oiling of the tows in the 1000m of the surface of the Nth spinning cake and the tows in the bottom layer of the Nth spinning cake after the head is rebuilt by automatically controlling the frequency of the oiling agent pumping during the time of N1-T2 to N1 + T2.
In the production process of the polyester pre-oriented yarn, one 15.5kg polyester pre-oriented yarn is basically millions of meters, and when the polyester pre-oriented yarn is continuously processed into the polyester low stretch yarn, when the tail yarn of one POY yarn bobbin is connected with the surface yarn head of the other POY yarn bobbin, because network points are arranged in 6000 meters of the bottom yarn, stiff yarn tightening points are easily generated during post-processing false twisting deformation, and further quality problems such as hidden stripes on the cloth cover are generated. Particularly, after the bottom layer silk and the surface silk oil agent in the silk cake volatilize, the cohesion of the silk bundle can be influenced, so that the problem of tail end breakage is caused, although the cohesion of the post-processing of the silk bundle can be improved by improving the oil content of the POY silk bundle, the maintenance period of a DTY hot box can be shortened easily due to the fact that the oil content of the POY silk bundle is too high, and the problem of improving the upper limit of the oil content of the POY silk is limited. Therefore, in order to solve the problem, the oil content of POY bottom layer wires with the initial length of 0-1000 m and POY surface wires with the final length of 1000m of the wire cake is increased by 8-15%, the middle area is kept unchanged, the bottom layer paper tube is covered by the wire cake with the outer diameter of 125mm, 1000m is equivalent to 255 circles of paper tube windings, the oil content of the whole wire cake is not influenced, even if the surface wires of the wire cake volatilize and the bottom layer wire paper tube absorb oil, the oil content of the bottom layer is higher, the cohesion of the wire bundle is not reduced, the elasticized tail passing rate of the obtained POY wires produced at present is more than 96%, the elasticized tail passing rate of the POY wires stored for three months is more than 95.5%, and the tail passing rate is further improved, meanwhile, when the oil content of the bottom layer 1000 meters and the surface layer 1000 meters is increased, the coking condition of a DTY heating box is not influenced, the tail passing condition of the DTY can be avoided, and the problem that the tail passing effect is reduced due to the fact that the tail passing of the wire bundle is generated after the volatilization of the oil agent is avoided, and the tail passing effect is low is ensured. When the oil is added to the surface tows of 1000 meters and the bottom tows of 1000 meters of each spinning cake, the control is simple and convenient, and the purpose of ending the tows for oiling can be ensured to be realized by each spinning cake.
Further improved is that the processing method after the stop of spinning cake in the continuous production process comprises the following steps:
step 1, turning off an oiling agent pump and treating related problems;
and 2, restarting the oiling agent pump, and then recalculating the oil outlet frequency increasing time of the oiling agent pump according to the oiling method of the tows within 1000 meters on the surface of the spinning cake and the tows within 1000 meters on the bottom spinning cake and automatically controlling the oiling agent pump.
Even if the spinning cake has sudden faults of equipment in the production process, the starting time of the oiling agent pump can be continuously calculated according to the system data, and when the oiling agent is added, the current spinning cake is only affected by a certain length at most, so that the subsequent head-tail oiling condition of the spinning cake is not affected.
Further improves that the oil content of POY bottom layer yarn with the initial length of 0-1000 m and POY surface yarn with the final length of 1000m of each POY yarn cake is increased by 8-12 percent
After volatilizing the surface silk and absorbing oil of the bottom silk paper tube, the bottom layer oil content is higher, the cohesion of the silk bundles is not reduced, the tail passing rate is further improved to 96.5%, the oil content is only increased on the surface layer and the bottom layer of the POY silk, and one 15.5kg polyester pre-oriented yarn is basically millions of meters, so that the coking condition of a subsequent DTY heating box can not be shadow-played. Wherein, the improvement of the tail passing rate can be ensured only by increasing the oil content of the POY bottom yarn with the initial length of 0-1000 m and the POY surface yarn with the final length of 1000m by 10 percent.
The oil agent mixed liquid in the oiling process further comprises crude oil, a fluorocarbon surfactant, deionized water and a preservative, wherein the crude oil is diluted to form the mixed oil agent with the oil concentration of 8-15%.
In the oiling process, because the concentration of crude oil used in the current POY oiling process is too high, the oiling can be performed only after the crude oil is diluted into an oiling agent mixed solution through deionized water, and because the POY bottom filaments are extruded for a long time, the phenomenon of adhesion with paper tubes can exist, meanwhile, 90% of components in the POY oiling agent are water, and the water can melt the parchment curing glue adhered to the surface of the paper tubes, so that part of bottom filaments are adhered to the glue, and the bottom filaments are torn off when the POY passes the tail, so that the tail passing rate is influenced. Therefore, the fluorocarbon surfactant is added into the crude oil, and the fluorocarbon surfactant contains hydrophobic carbon and fluorine, so that the fluorocarbon surfactant has the characteristics of hydrophobicity and oleophobicity, and the problems that glue on a paper tube is melted to generate adhesion and the tail is broken after the bottom layer silk is stored for a long time are solved.
Further, the fluorocarbon content of the mixed oil solution is 10.5 to 13.5 weight percent.
If the addition amount of the fluorocarbon is too low, the oil with good hydrophobicity cannot be prepared, and if the addition amount of the fluorocarbon is too high, other performance indexes of the oil can be influenced. Therefore, it is required to control the content of the fluorocarbon surfactant in the crude oil within a certain range, wherein the stability is better when the content of the fluorocarbon is 10.5 to 13.5wt% of the crude oil mixture.
The preservative is further improved to have the content of 0.5-1%, so that the preservative effect can be ensured under the condition that the performance of the oiling filament bundle is not affected.
Further improved is that the oil agent mixed solution is also added with a polyoxyethylene nonionic surfactant.
The problem that the tow is adhered to the POY paper tube is solved by adding the fluorocarbon surfactant, but the fluorocarbon chain is hydrophobic and oleophobic and is not easy to be uniformly mixed with deionized water, and the polyoxyethylene nonionic surfactant is added into the oil agent mixed solution again.
In the prior art, the oiling agent does not contain a fluorocarbon surfactant, and when POY is stored for a long time, the problem that water in the tow oiling agent can melt the solidified glue of the parchment adhered to the surface of the paper tube, so that part of bottom filaments are adhered to the glue exists. According to the invention, the fluorocarbon surfactant is added, and contains two elements of hydrophobic carbon and fluorine, so that the fluorocarbon surfactant has the characteristics of hydrophobicity and oleophobicity, and the problem that glue on a paper tube is melted by a bottom layer wire to generate adhesion is solved. Meanwhile, a polyoxyethylene nonionic surfactant is added in the oil agent, so that the mixing uniformity of crude oil and water is improved. Because the concentration of the oil agent is basically 8-15 percent (namely 8-15 percent of crude oil and 85-92 percent of deionized water) when POY is oiled, when the fluorocarbon surfactant is added, the fluorocarbon chain is hydrophobic and oleophobic, and is not easy to be uniformly mixed with the deionized water, and the nonionic polyoxyethylene group can solve the problem.
The tail passing condition of the spinning cake prepared by the oil increasing method is as shown in examples 1-7:
example 1
The POY cake is directly used for the tail passing success rate of elasticizing after about 24 hours of balance time; for the production process flow of POY yarn cakes and DTY yarn cakes, the oil content of POY bottom yarn and POY surface yarn of each POY yarn cake is increased to 8% by an oil solution mixed solution containing a fluorocarbon surfactant and a polyoxyethylene type nonionic surfactant, then the yarn cakes are divided into two cases of directly putting into production for elasticizing and passing through tails and putting into production for 3-4 months, the two cases of directly putting into production for elasticizing and passing through tails are used for elasticizing to form the DTY yarn cakes, after the POY yarn cakes under the two cases are respectively continuously produced for 1 month in the process under the normal production condition, the average tail passing success rate of the finished product is 97.3%, and the tail passing success rate of the product put into production after 3-4 months is about 95.7%.
Examples 2 to 7
Compared with example 1, other process conditions are unchanged, and only the increase of the oil content of POY bottom yarn and POY surface yarn of each POY yarn cake is changed, and the average value of the tail passing success rate of the obtained product produced at present and the tail passing success rate of the product put into production after being placed for 3-4 months are shown in table 1.
Comparative example 1
The oil content of the POY base and top filaments was not increased compared to example 1; for POY spinning cakes and DTY spinning cakes, the production process flow is unchanged, each POY spinning cake is oiled by an oiling agent mixed solution containing a fluorocarbon surfactant and a polyoxyethylene nonionic surfactant, then the spinning cake is divided into two cases of direct use and 3-4 months of placing, and then the two cases are put into production, when the spinning cake is used for elasticizing the DTY spinning cake, the average tail passing success rate of the produced product is 96.1% after the POY spinning cakes under the two cases are respectively continuously produced for 1 month in the process under the normal production condition, and the tail passing success rate of the produced product is about 94.2% after the spinning cake is placed for 3-4 months.
Comparative example 2
Compared with the embodiment 2, the oil content of the bottom layer yarn and the surface layer yarn are increased consistently, the production process flow of POY yarn cakes and DTY yarn cakes is unchanged, but the oiling agent mixture during oiling of each POY yarn cake is not added with fluorocarbon surfactant and polyoxyethylene nonionic surfactant, then the yarn cakes are divided into two cases of direct production and 3-4 months of placing and then production, when the yarn cakes are used for elasticizing the DTY yarn cakes, after the POY yarn cakes under the two cases are continuously produced for 1 month in the process under the normal production condition, the average tail passing success rate of the produced product is 96.8%, and the tail passing success rate of the product put into production after 3-4 months of placing is about 93.5%.
Comparative example 3
Compared with the embodiment 4, the oil content of the bottom layer yarn and the surface layer yarn are increased consistently, the production process flow of POY yarn cakes and DTY yarn cakes is unchanged, but the oiling agent mixture during oiling of each POY yarn cake is not added with fluorocarbon surfactant and polyoxyethylene nonionic surfactant, then the yarn cakes are divided into two cases of direct production and 3-4 months of placing and then production, after the yarn cakes are used for synthesizing the DTY yarn cakes, after the POY yarn cakes under the two cases are respectively continuously produced for 1 month in the process under the normal production condition, the average tail passing success rate of the produced product is 97.9%, and the tail passing success rate of the product put into production after 3-4 months is about 94.1%.
Table 1 shows the oil content and the tail success rate data for the products of examples 1-7 and comparative examples 1-3:
TABLE 1
As can be seen from table 1, when the fluorocarbon surfactant and the polyoxyethylene nonionic surfactant are not added to the oil solution mixture, although the tail passing success rate of the existing product can be improved by simply increasing the percentage of the oil solution mixture, the tail passing success rate of the existing product is easily increased with the increase of time, the number of times of breakage of the POY bottom fibers occurs when the tail is passed, and the longer the time is, the higher the tail passing breakage rate. However, when the oil content of the POY bottom layer yarn and the POY surface yarn on the POY cake is increased to 8-14% by the oil solution mixed solution containing the fluorocarbon surfactant and the polyoxyethylene nonionic surfactant, the tail passing success rate of the product after being placed for at least 3 months can be obviously improved, so that the product can have good tail passing success rate after being placed for a certain time, particularly when the oil content is increased to 11%, the tail passing success rate after being placed for a certain time is ensured, the tail passing success rate of the existing product can be improved, and the tar generating condition of the DTY cake can not happen after the oil solution is increased.
The above embodiments are only preferred embodiments of the present application, and the scope of the present application is not limited thereto, but any insubstantial changes and substitutions made by those skilled in the art on the basis of the present application are intended to be within the scope of the present application.
Claims (9)
1. A method for improving the tail passing success rate of POY is characterized by comprising the following steps: the POY yarn cakes are prepared by slurry preparation, esterification, polycondensation, metering, spinneret plate melt extrusion, cooling, oiling and winding, and when the POY yarns are spun, the oil content of POY bottom layer yarns with the initial length of 0-1000 m and POY surface yarns with the final length of 1000m of each POY yarn cake is increased by 8-15%, and the oil content of POY yarns in the middle part is unchanged.
2. The method for improving tail-through success rate of POY according to claim 1, wherein: the method for oiling the surface yarn bundles of 1000 meters and the bottom yarn bundles of 1000 meters of the spinning cake comprises the following steps:
step 1, firstly calculating full-winding time T1 of a doffing yarn, wherein T1=winding weight 10000/specification spinning speed;
step 2, calculating the time T2 required by the oiling process of 1000 meters of tows, wherein T2=1000 meters/spinning speed;
step 3, setting the oil outlet frequency of an oiling agent pump in the oiling process to improve the oil content in the passing filament bundles, wherein the oil outlet frequency of the oiling agent pump is increased by the time of T2 at the bottom layer of a first spinning cake, T1-T2 of filaments on the surface of the first spinning cake and T1+T2 of filaments on the bottom layer of a second spinning cake after the spinning head is regenerated;
step 4, automatically controlling the oil pumping frequency of the oiling agent to increase according to the time T2 required by the oiling process, so that the oil content of tows passing through the time T2 is increased, and oiling is carried out on tows in 1000 meters of the bottom layer of the first spinning cake after the new spinning head;
step 5, calculating oil pumping-out frequency increasing time required by oil pumping out of the surface yarn 1000m of the first spinning cake after the head is regenerated and oil pumping-out frequency increasing time required by oil pumping out of the yarn 1000m of the bottom layer yarn of the second spinning cake according to the time T1-T2 to T1+ T2, and automatically controlling the frequency of an oil pumping-out agent pumping-out pump to oil the surface yarn 1000m of the first spinning cake after the head is regenerated and the oil pumping-out frequency increasing time required by oil pumping out of the yarn 1000m of the bottom layer yarn of the second spinning cake during the time T1-T2 to T1+ T2;
step 6, calculating the oil pumping-out frequency increasing time required by the oil pumping-out of the tows in the 1000m of the surface of the second spinning cake after the head is rebuilt and the oil pumping-out frequency increasing time required by the oil pumping-out of the tows in the bottom layer of the third spinning cake 1000 according to the time from 2 to 1 to 2 to 1+T2, and carrying out oil pumping-out on the tows in the 1000m of the surface of the second spinning cake and the tows in the bottom layer of the third spinning cake 1000 after the head is rebuilt by automatically controlling the frequency of the oil pumping-out pump during the time from 2 to 1 to 2;
step 7, performing the same calculation, namely calculating the oil pumping-out frequency increasing time required by the oiling of the tows in the 1000m of the surface of the Nth spinning cake after the head is rebuilt and the oil pumping-out frequency increasing time required by the oiling of the tows in the bottom layer of the silk 1000 of the Nth spinning cake according to the calculation method of N1-T2 to N1 + T2, and then performing the oiling of the tows in the 1000m of the surface of the Nth spinning cake and the tows in the bottom layer of the Nth spinning cake after the head is rebuilt by automatically controlling the frequency of the oiling agent pumping during the time of N1-T2 to N1 + T2.
3. The method for improving tail-through success rate of POY according to claim 2, wherein: the processing method for the spinning cake after stopping in the continuous production process comprises the following steps:
step 1, turning off an oiling agent pump and treating related problems;
and 2, restarting the oiling agent pump, and then recalculating the oil outlet frequency increasing time of the oiling agent pump according to the oiling method of the tows within 1000 meters on the surface of the spinning cake and the tows within 1000 meters on the bottom spinning cake and automatically controlling the oiling agent pump.
4. The method for improving tail-through success rate of POY according to claim 2, wherein: the processing method for the spinning cake after stopping in the continuous production process comprises the following steps: step 1, turning off an oiling agent pump and treating related problems; and 2, restarting the oiling agent pump, and then recalculating the oil outlet frequency increasing time of the oiling agent pump according to the oiling method of the tows within 1000 meters on the surface of the spinning cake and the tows within 1000 meters on the bottom spinning cake and automatically controlling the oiling agent pump.
5. A method for improving tail passing success rate of POY according to any one of claims 1-3, wherein: the oil content of POY bottom layer yarns with the initial length of 0-1000 m and POY surface yarns with the final length of 1000m of each POY yarn cake is increased by 8-12%.
6. The method for improving tail-through success rate of POY according to claim 1, wherein: the oil agent mixed liquid in the oiling process comprises crude oil, fluorocarbon surfactant, deionized water and preservative, and the crude oil is diluted to form the mixed oil agent with the oil concentration of 8-15%.
7. The method for improving tail-through success rate of POY according to claim 1, wherein: the content of the preservative is 0.5-1%.
8. The method for improving tail-through success rate of POY according to claim 1, wherein: the fluorocarbon content of the mixed oil solution is 10.5-13.5wt%.
9. The method for improving POY tail-through success rate according to claim 6, wherein: the mixed oil is also added with a polyoxyethylene nonionic surfactant.
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