WO2023124514A1 - 一种提高网络复丝网络牢度的方法 - Google Patents

一种提高网络复丝网络牢度的方法 Download PDF

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WO2023124514A1
WO2023124514A1 PCT/CN2022/129249 CN2022129249W WO2023124514A1 WO 2023124514 A1 WO2023124514 A1 WO 2023124514A1 CN 2022129249 W CN2022129249 W CN 2022129249W WO 2023124514 A1 WO2023124514 A1 WO 2023124514A1
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network
nozzle
path
silk
multifilament
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PCT/CN2022/129249
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English (en)
French (fr)
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王山水
王丽丽
汤方明
尹立新
王雪
孙晓华
杨超明
寇婉婷
陈琦
钮臧臧
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江苏恒力化纤股份有限公司
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Publication of WO2023124514A1 publication Critical patent/WO2023124514A1/zh

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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
    • D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams

Definitions

  • the invention belongs to the field of spinning and relates to a method for improving the network fastness of network multifilaments.
  • Network technology is widely used in chemical fiber production and has a relatively high maturity. It has strong practicability and large development space.
  • Network processing is a technology that effectively improves the cohesion of chemical fiber filaments, enabling the filaments to achieve the purpose of no twisting and sizing, and can effectively shorten the technological process of filament weaving.
  • the technical measure usually adopted in the filament network technology is to feed the unnetworked multifilament into the yarn channel of the network nozzle, inject high-pressure air into the yarn channel through a nozzle, and the rotating vortex formed by the high-pressure air flow in the yarn channel makes the multifilament
  • the monofilaments inside are entangled and interspersed with each other to form a network knot.
  • Factors that affect the network fastness of multifilament usually include compressed air pressure, processing speed, etc. By optimizing the technical parameters such as compressed air pressure and processing speed, the network fastness of network yarn can be appropriately improved. Therefore, the network multifilament obtained by this method is During weaving, under the repeated action of the heald frame and the steel buckle, the network knot will still loosen, which will affect the weaving quality.
  • a method of improving the network fastness of the network multifilament of the present invention is specifically: designing a new nozzle, and wherein the two nozzles in the nozzle form different rotation direction vortices in the silk channel Function, so that the multifilaments are not entangled and interspersed in one direction during the network, making the structure of the network knots more stable, and the fastness of the network is also higher, effectively reducing the loosening of the network knots during weaving, and contributing to the complex network.
  • the weaving quality of silk weaving provides guarantee.
  • a method for improving the network fastness of networked multifilaments is adopted.
  • the multifilaments without network function are adjusted and pre-tensioned by a tensioner, and then fed and threaded after being gripped by a feed roller and a feed roller.
  • the yarn path passing through the nozzle is grasped and drawn out by the yarn delivery roller and the yarn delivery top roller, and wound by the winding roller to obtain the network multifilament;
  • the nozzle is formed by processing a cube structure (the material is generally metal material), on the cube, the surface a and the surface a' are parallel to each other, the surface b and the surface b' are parallel to each other, and the surface c and the surface c' are parallel to each other; Processing refers to opening groove w, groove v and groove u through surface b and surface b' on surface c, opening a through hole extending to surface a' on surface a, and the through hole passes through groove w, groove v and groove u and as the thread path of the nozzle, wherein a part of the thread path between the groove w and the groove v is marked as the thread path A, and a part of the thread path between the groove v and the groove u is marked as the thread path B; A hole x communicating with the silk path A, the connection surface of the hole x and the silk path A completely falls on the side wall of the silk path A; A connected hole y, the connection surface between the hole y and the silk
  • the line between the holding point between the feeding roller and the feeding top roller and the holding point between the yarn delivery roller and the yarn delivery top roller coincides with the central axis of the silk path, and the feeding roller and the yarn delivery roller
  • the linear speed is equal;
  • the pressure of the compressed airflow injected into the silk channel by the nozzle I is higher than the pressure of the compressed airflow injected by the nozzle II into the silk channel.
  • the general principle of filament network processing is that when the filament passes through the nozzle, it is impacted by the nozzle airflow, and the originally parallel monofilaments of the tow are separated to form a symmetrical fluffy wave-like opening section, which is called the fiber opening part.
  • the monofilaments impacted by the airflow are interspersed and transferred under the action of the eddy current, forming a false twist braid and forming a network knot, which is called the intersection part.
  • Nr the number of remaining network knots after the long network multifilament is subjected to a load of 132mN/tex for 3 minutes is tested according to FZ/T 50001-2005 "Test Method for Network Degree of Synthetic Filament Filament".
  • the principle of network processing is that the multifilaments will be entangled with each other under the action of the rotating air flow. Since the air flow flows in the form of a rotating vortex, when the multifilaments are interspersed and transferred by the air flow, the direction of their interspersed and transferred is the same as the The direction of rotation of the airflow is related to the direction of the airflow.
  • the reason why the network multifilament made by the network technology in the prior art is not high in network fastness, and there will be a phenomenon of loosening during weaving is because, when the network knot is produced in the network process in the prior art, the monofilament The direction of entanglement and interpenetration is consistent.
  • the present invention first pass through the center of the wire path between the gripping point between the feeding roller and the feeding top roller before and after the nozzle and the gripping point between the yarn delivery roller and the yarn delivery top roller.
  • the axes are coincident, and the linear speeds of the feeding roller and the yarn drawing roller are equal, so that there is no overfeeding phenomenon between the feeding roller and the yarn drawing roller, thereby ensuring that the multifilament is on the central axis in the yarn path of the nozzle, and then the present invention
  • Two nozzles are also arranged on the network nozzle.
  • the nozzle I and the nozzle II are located on the opposite sides of the yarn path, that is, the nozzle I and the nozzle II are not aligned with the central axis of the yarn path, and the rotating air flow only acts on the single filament outside the center of the multifilament. filament, so that the outer monofilament forms a certain wrapping effect on the central monofilament. Specifically: since the nozzle I is located in the upper half of the central axis of the thread path A, the airflow injected into the thread path A will form a rotating vortex shape.
  • the rotating air flow will cause the shape of the network knot to deflect with the direction of the airflow when the filament is in the network, that is, the shape of the network knot will follow the direction of the airflow rotation;
  • the airflow entering silk path B will also form a rotating vortex, and the direction of the rotating airflow in threadway A is opposite to that in threadway B, and the rotating airflow in the two silkways is divided by the middle groove v , are independent of each other and do not affect each other, so the deflection direction of the network knots formed by the multifilaments in the silk path A is opposite to the deflection direction of the network knots formed in the silk path B, then the direction of the entanglement and interpenetration of the multifilament network is also opposite , therefore, when the outer monofilament forms a certain entanglement with the central monofilament, under the action of two opposite airflows, they will also knot each other, so the fastness after the network is higher; at the same time, the present invention controls the sp
  • the network knot formed by the nozzle I is again affected by the airflow of the nozzle II, and the monofilament is reversed again.
  • the direction is shifted and entangled. Therefore, the network fastness of the network knot becomes better, and it is less easy to detach, and the fastness during weaving is better.
  • the diameter of the silk channel is 2.5-3mm
  • the structure of the nozzle I and the nozzle II is the same
  • the apertures are 0.5-1mm
  • the hole The distance between the projection line of the central axis of x on the cross-section of the silk channel and the center point of the cross-section is 0.5-0.8 mm.
  • the pressure of nozzle I injecting airflow into silk path A is 0.1-0.3 MPa
  • the pressure of nozzle II injecting airflow into silk path B is 0.05-0.08 MPa.
  • the value range of d is 18-20 mm, and the value range of v is 30-50 m/s.
  • the pre-tension is 0.01-0.05N.
  • the purpose of setting the pre-tension is: due to the addition of the feed roller and yarn drawing roller, the multifilament is in a straight state in the yarn path, and if the pre-tension is too large, it will affect the insertion and transfer of the monofilament.
  • t 1 is 0.1-0.3ms.
  • the specifications of the network multifilaments are 3-15tex/10-40F.
  • said network multifilaments are composed of several continuous circulation units in the longitudinal direction; Ministry composition.
  • a kind of method of improving network multifilament network fastness of the present invention has the following advantages:
  • the network fastness of the network multifilament formed by the method for improving the network fastness of the network multifilament of the present invention is high, and the network knot of the multifilament after the network is not easy to loosen when weaving, and can achieve no twisting, no It can be woven after sizing, which shortens the weaving process;
  • a method for improving the network fastness of network multifilaments in the present invention has simple process, convenient processing of network nozzles, easy realization and wide application range.
  • Fig. 1 is the schematic diagram of the device structure improving network multifilament network fastness
  • Fig. 2 is the sectional structure schematic diagram of nozzle
  • 1-multifilament without network action 2-tensioner, 3-feeding roller, 4-feeding top roller, 5-nozzle, 6-filament path A, 7-filament path B, 8-drawing yarn Roller, 9-yarn drawing top roller, 10-winding roller, 11-spout I, 12-spout II.
  • a nozzle for improving the network fastness of network multifilaments the structure of which is as follows:
  • the nozzle is formed by processing a cubic structure (metal material).
  • surfaces a and a' are parallel to each other
  • surfaces b and b' are parallel to each other
  • surfaces c and c' are parallel to each other.
  • the processing refers to opening groove w, groove v and groove u through surface b and surface b' on surface c, opening a through hole extending to surface a' with a diameter of 2.5 to 3 mm on surface a, the through hole Pass through groove w, groove v and groove u and serve as the wire path of the nozzle, wherein a part of the wire path between groove w and groove v is marked as silk path A6, and a part of the wire path between groove v and groove u is marked as Silk road B 7; On the surface b, a hole x communicating with the silk road A is offered, and the connection surface between the hole x and the silk road A falls completely on the side wall of the silk road A; on the surface b There is a hole y in communication with the silk path B, and the connection surface between the hole y and the silk path B completely falls on the side wall of the silk path B; the central axis of the hole x and the The central axis of the hole y is perpendicular to the
  • x is the nozzle I 11 of the thread path A
  • the hole y is the nozzle II 12 of the thread path B
  • the structure of the nozzle I and the nozzle II is the same, and the diameter of the hole is 0.5 ⁇ 1mm
  • the center of the hole x The distance between the projection line of the axis on the cross-section of the silk channel and the center point of the cross-section is 0.5-0.8 mm.
  • a method for improving the network fastness of network multifilament, its network method is as follows:
  • Raw material preparation A 25tex/40F polyester POY without network action
  • the connecting line between the holding point between the feeding roller and the feeding top roller and the holding point between the yarn delivery roller and the yarn delivery top roller coincides with the central axis of the silk path, and the feeding roller and the yarn delivery roller
  • the pretension is 0.05N;
  • the wire diameter is 3mm
  • t1 is 0.3ms
  • d 18mm
  • v 35m/s
  • the pressure of the airflow injected from the nozzle I into the silk path A is 0.3MPa;
  • the pressure of the airflow injected from the nozzle II into the silk channel B is 0.05MPa
  • the prepared network multifilament is composed of several continuous circulation units in the longitudinal direction, and each circulation unit is composed of sequentially connected fiber opening parts and intertwining parts; the network fastness of the network multifilament is 99%.
  • a method for improving the network fastness of network multifilament, its network method is as follows:
  • Raw material preparation A 17tex/30F polyester POY without network action
  • the connecting line between the holding point between the feeding roller and the feeding top roller and the holding point between the yarn delivery roller and the yarn delivery top roller coincides with the central axis of the silk path, and the feeding roller and the yarn delivery roller
  • the pretension is 0.01N;
  • the wire diameter is 2.5mm
  • Nozzle diameter is 0.5mm
  • t1 is 0.2ms
  • d 20mm
  • v 50m/s
  • the pressure of the airflow injected from the nozzle I into the silk path A is 0.1MPa;
  • the pressure of the airflow injected from the nozzle II into the silk channel B is 0.08MPa
  • the prepared network multifilament is composed of several continuous circulation units in the longitudinal direction, and each circulation unit is composed of sequentially connected fiber opening parts and intertwining parts; the network fastness of the network multifilament is 97%.
  • a method for improving the network fastness of network multifilament, its network method is as follows:
  • Raw material preparation A 20tex/35F polyester POY without network action
  • the connecting line between the holding point between the feeding roller and the feeding top roller and the holding point between the yarn delivery roller and the yarn delivery top roller coincides with the central axis of the silk path, and the feeding roller and the yarn delivery roller
  • the pretension is 0.01N;
  • the wire diameter is 3mm
  • Nozzle diameter is 0.5mm
  • t1 is 0.1ms
  • d 20mm
  • v 50m/s
  • the pressure of the airflow injected from the nozzle I into the silk path A is 0.1MPa;
  • the pressure of the airflow injected from the nozzle II into the silk channel B is 0.08MPa
  • the prepared network multifilament is composed of several continuous circulation units in the longitudinal direction, and each circulation unit is composed of sequentially connected fiber opening parts and intertwining parts; the network fastness of the network multifilament is 98%.
  • a method for improving the network fastness of network multifilament, its network method is as follows:
  • Raw material preparation A 14tex/20F polyester POY without network action
  • the connecting line between the holding point between the feeding roller and the feeding top roller and the holding point between the yarn delivery roller and the yarn delivery top roller coincides with the central axis of the silk path, and the feeding roller and the yarn delivery roller
  • the pretension is 0.05N;
  • the wire diameter is 2.5mm
  • t1 is 0.3ms
  • d 18mm
  • v 30m/s
  • the pressure of the airflow injected from the nozzle I into the silk path A is 0.3MPa;
  • the pressure of the airflow injected from the nozzle II into the silk channel B is 0.05MPa
  • the prepared network multifilament is composed of several continuous circulation units in the longitudinal direction, and each circulation unit is composed of sequentially connected fiber opening parts and intertwining parts; the network fastness of the network multifilament is 99%.
  • a kind of network method of network multifilament its operation is basically the same as embodiment 2, and difference only is: do not inject compressed airflow in the spout II;
  • the network fastness of the obtained network multifilament is 87%. Comparing Comparative Example 1 and Example 2, it can be seen that the network fastness of Comparative Example 1 decreases, and this is because when the nozzle II does not inject the compressed air flow, the multifilament is only subjected to the effect of the compressed air flow injected by the nozzle I, Its network fastness is at the same level as that of the prior art.
  • a network method for networking multifilaments the operation of which is basically the same as that of Embodiment 2, the only difference being that the pressure of the compressed airflow injected into the wire channel from the nozzle I is equal to the pressure of the compressed air injected into the wire channel from the nozzle II, both of which are 0.3 mpa;
  • the network fastness of the obtained network multifilament is 82%. Comparing Comparative Example 2 and Example 2, it can be seen that the network fastness of Comparative Example 2 declines, and this is because when the pressure of the compressed airflow injected into the silk channel by the nozzle I is equal to the pressure of the compressed airflow injected by the nozzle II into the silk channel , because the direction of the two airflows is opposite and the pressure is the same, the airflow injected into the nozzle II has a stronger untwisting effect on the network knot formed by the nozzle I, which will reduce the network fastness.
  • a network method for network multifilament, its operation is basically the same as that of embodiment 2, the only difference is that the structure of the nozzle used is different from that of embodiment 1, that is, the central axis of the hole x is on the cross section of the wire path The distance between the projection line and the center point of the cross section is 0.
  • the network fastness of the obtained network multifilament is 83%. Comparing Comparative Example 3 and Example 2, it can be seen that the network fastness of Comparative Example 3 declines, and this is because when the direction of the injection airflow of the nozzle I and the nozzle II is all aligned with the central position of the silk path, the effect of the airflow It will directly act on the center of the multifilament, and the airflow in the central area will diffuse to both sides, so that it is more mixed and the vortex formed is unstable, resulting in weak entanglement and knotting. Therefore, the network fastness is relatively lower.
  • a network method for network multifilaments the operation of which is basically the same as in embodiment 2, the only difference is that there is a difference between the structure of the nozzle used and that of embodiment 1, that is, the central axis of the hole x and the hole y
  • the projection lines of the central axis of x on the cross section of the silk channel are parallel to each other and asymmetrical to the center point of the cross section, and the projection line of the central axis of the hole x on the cross section of the silk channel is the same as that of the cross section
  • the distance between the central points of is 0, and the distance between the projection line of the central axis of the hole y on the cross-section of the silk channel and the central point of the cross-section is the same as in embodiment 1.
  • the network fastness of the obtained network multifilament is 88%. Comparing Comparative Example 4 with Example 2, it can be seen that the network fastness of Comparative Example 4 decreases, this is because when the airflow in the nozzle I is aimed at the center of the multifilament, and when the nozzle II blows the monofilament on one side, due to The pressure of the airflow injected into the nozzle I is relatively high, and it acts on the center of the multifilament, and the eddy current effect formed is poor, and the transfer of the monofilament under the action of the airflow I is weak, and the intertwining is weak, so the network fastness is low.
  • a network method for network multifilaments the operation of which is basically the same as in embodiment 2, the only difference is that there is a difference between the structure of the nozzle used and that of embodiment 1, that is, the central axis of the hole x and the hole y
  • the projection lines of the central axis of x on the cross section of the silk channel are parallel to each other and asymmetrical to the center point of the cross section, and the projection line of the central axis of the hole x on the cross section of the silk channel is the same as that of the cross section
  • the distance between the central points of is the same as that in Embodiment 1, and the distance between the projection line of the central axis of the hole y on the cross-section of the silk channel and the central point of the cross-section is 0.
  • the network fastness of the obtained network multifilament is 90%. Comparing Comparative Example 5 with Example 2, it can be seen that the network fastness of Comparative Example 5 decreases, this is because when the airflow of the nozzle I is aimed at the monofilament on one side, and the airflow of the nozzle II is aimed at the middle position of the multifilament , its action principle is consistent with that of Comparative Example 4, but because the vortex effect formed when nozzle I blows to one side is stronger than that of nozzle II, the network fastness of Comparative Example 5 is greater than that of Comparative Example 4.
  • a network method for network multifilament its operation is basically the same as that of embodiment 2, the only difference is that there is a difference between the structure of the nozzle used and that of embodiment 1, that is, the hole x and the hole y are all on the surface b Formed on.
  • the network fastness of the obtained network multifilament is 92%. Comparing Comparative Example 6 with Example 2, it can be seen that the network fastness of Comparative Example 6 decreases. This is because when the direction of the airflow injected into the nozzle I and the nozzle II is the same, the network direction of the network node is the same, and there is no The reverse entanglement and knotting effect will reduce the network fastness.

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Abstract

一种提高网络复丝的网络牢度的方法，采用DTY纺丝工艺，将未经网络作用的复丝（1）经张力器（2）调整预加张力后由喂给罗拉（3）和喂给皮辊（4）握持后喂入并穿过喷嘴（5）的丝道（6），由引纱罗拉（8）和引纱皮辊（9）握持引出，并由卷绕罗拉（10）卷绕即得所述网络复丝；其中，喂给罗拉（3）和喂给皮辊（4）之间的握持点与引纱罗拉（8）和引纱皮辊（9）之间的握持点之间的连线与丝道（6）的中心轴线重合，且喂给罗拉（3）和引纱罗拉（8）的线速度相等，且复丝穿过喷嘴（5）的丝道（6）时，喷口Ⅰ（11）和喷口Ⅱ（12）分别向丝道A和丝道B内间歇射入压缩气流，喷口Ⅰ（11）向丝道（6）内射入压缩气流的压强大于喷口Ⅱ（12）向丝道（6）内射入压缩气流的压强。网络后的复丝在织造时网络结不易松开，可以达到不加捻、不上浆即可织造，缩短了织造工艺流程。

Description

一种提高网络复丝网络牢度的方法 技术领域
本发明属于纺丝领域，涉及一种提高网络复丝网络牢度的方法。
背景技术
网络技术是化纤生产中广泛应用、成熟度比较高的一项技术，具有较强的实用性和较大的发展空间。网络加工是一项有效提高化纤长丝抱合力的技术，可使丝条达到不加捻、免上浆的目的，可有效缩短长丝织造时的工艺流程。现阶段，长丝网络技术通常采用的技术措施是将未网络的复丝喂入网络喷嘴的丝道内，通过一个喷口向丝道内射入高压气流，高压气流在丝道内形成的旋转涡流使得复丝内的单丝相互纠缠、穿插，从而形成网络结。影响复丝网络牢度的因素通常有压缩空气压强、加工速度等，通过优化压缩空气压强、加工速度等技术参数可以适当提高网络丝的网络牢度，因此，这种方法得到的网络复丝在织造时网络结在综框及钢扣反复的作用下，还是会出现松脱的现象，从而会影响织造质量。
发明内容
针对现有技术存在的问题，本发明的一种提高网络复丝网络牢度的方法，具体是：设计新的喷嘴，并其中该喷嘴中的两个喷口在丝道内形成的不同旋转方向涡流的作用，使复丝在网络时单丝不是沿一个方向纠缠、穿插，使得网络结的结构形态更加稳定，网络的牢度也更高，有效减少了织造时网络结的松脱现象，为网络复丝织造时的织造质量提供了保证。
为达到上述目的，本发明提供的技术方案如下：
一种提高网络复丝的网络牢度的方法，采用DTY纺丝工艺，未经网络作用的复丝经张力器调整预加张力后由喂给罗拉和喂给皮辊握持后喂入并穿过喷嘴的丝道，由引纱罗拉和引纱皮辊握持引出，并由卷绕罗拉卷绕即得所述网络复丝；
喷嘴是由一立方体结构(材质一般是金属材质)加工形成，所述立方体上，面a和面a’相互平行，面b和面b’相互平行，面c和面c’相互平行；所述加工是指在面c上开设贯通面b和面b’的槽w、槽v和槽u，在面a上开设延伸至面a’的通孔，通孔穿过槽w、槽v和槽u并作为所述喷嘴的丝道，其中槽w和槽v之间的一部分丝道记为丝道A，槽v和槽u之间的一部分丝道记为丝道B；在面b上开设与所述丝道A连通的孔x，所述孔x与所述丝道A的连接面完全落入所述丝道A的侧壁上；在面b’上开设有与所述丝道B连通的孔y，所述孔y与所述丝道B的连接面完全落入所述丝道B的侧壁上；所述孔x的中心轴线和所述孔y的中心轴线均与所述丝道的中心轴线异面垂直，所述孔x的中心轴线和所述孔y的中心轴线在所述丝道的横截面上的投影线相互平行且相较于横截面的中心点对称；x作为丝道A的喷 口I，孔y作为丝道B的喷口II；
喂给罗拉和喂给皮辊之间的握持点与引纱罗拉和引纱皮辊之间的握持点之间的连线与丝道的中心轴线重合，且喂给罗拉和引纱罗拉的线速度相等；
复丝穿过喷嘴的丝道时，喷口I和喷口II分别向丝道A和丝道B内间歇射入压缩气流(即在丝道A内，复丝先经喷口I射入的气流的网络作用，再在丝道B内经喷口II射入的气流的网络作用)；喷口I向丝道A内射入气流的时间为t 1，经过△t后，喷口II开始向丝道B内射入气流，射入的时间为t 2，其中t 1和t 2相等；其中，△t＝d/v，d为所述喷口I与所述喷口II的中心轴线之间的水平距离，v为引纱罗拉的线速度；
喷口Ⅰ向丝道内射入压缩气流的压强大于喷口Ⅱ向丝道内射入压缩气流的压强。
长丝网络加工的一般原理为当长丝经过喷嘴时，受到喷口气流的冲击作用，丝束原先平行的单丝分离，形成对称的蓬松波状而成开松段，称为开纤部，未受气流冲击的单丝在涡流的作用下相互穿插、转移，形成假捻辫状而成网络结，称为交络部。衡量网络复丝的网络程度通常有两个指标，一是网络度N，是指单位长度(m)上网络结的数目；二是网络牢度S，定义为Nr/N，其中，Nr为单位长度的网络复丝在负荷132mN/tex作用3min后，残留的网络结的数目，根据FZ/T 50001-2005《合成纤维长丝网络度试验方法》测试。
本发明提高复丝网络牢度的原理为：
网络加工的原理是复丝在旋转气流的作用下会发生相互纠缠，由于气流是以旋转涡流的形态在流动，因此，复丝在受到气流作用相互穿插、转移时，其穿插、转移的方向与气流的旋转方向有关，都是顺着气流的方向。现有技术中的网络工艺所制得的网络复丝之所以网络牢度不高，在织造时会存在松脱的现象，是因为，现有技术中的网络工艺中网络结产生时，单丝之间的纠缠及穿插方向是一致的。
在本发明中，先通过设置喷嘴前后的喂给罗拉和喂给皮辊之间的握持点与引纱罗拉和引纱皮辊之间的握持点之间的连线与丝道的中心轴线重合，且喂给罗拉和引纱罗拉的线速度相等，可以使喂给罗拉和引纱罗拉之间无超喂现象，从而可以保证复丝在喷嘴的丝道内处于中心轴线上，然后本发明还在网络喷嘴上设置两个喷口，由于喷口I和喷口II位于丝道的相对侧，即喷口I和喷口II都不对准丝道的中心轴线，旋转气流的只作用于复丝中心外侧的单丝，使外侧单丝对中心的单丝形成一定的包缠效果，具体地：由于喷口I位于丝道A中心轴线的上半部，其射入丝道A的气流会形成旋转的涡流形态，旋转流动的气流会使长丝在网络时，网络结的形态随气流的方向发生偏转，即网络结的形态顺着气流旋转的方向；由于喷口II位于丝道B截面的下半部，其射入丝道B的气流也会形成旋转的涡流形态，且丝道A内的旋转气流的方向与丝道B内的旋转气流方向是相反的，且两个丝道内的旋转气流被中间槽v分割，相互独立不影响，所以复丝在丝道A内形成的网络结的偏转的方向与在丝道B内形成的网络结的偏转方向相 反，则复丝网络时，纠缠穿插的方向也是相反的，因此，当外侧单丝对中心的单丝形成一定的包缠时在两股反向相反的气流作用下，还会相互打结，因此网络后的牢度更高；同时，本发明控制喷口I射入气流的压强较大，则喷口I射入的气流形成的涡流作用更强，复丝中的单丝在涡流的作用下发生的转移幅度更大，因此喷口Ⅰ的气流决定了复丝网络的偏转方向，喷口II射入气流的压强小，会使经喷口I网络后的复丝在网络结处再次反方向穿插，但不会改变网络结的偏转方向，只是起到打乱并干扰网络结的方向，使单丝之间的纠缠、穿插作用更强，形成网络结的主要形态，通过对工艺的控制，使喷口I形成的网络结再次受到喷口II气流的作用，单丝再次反方向转移、纠缠，因此，网络结的网络牢度变的更好，更不易脱离，织造时的牢度更好。
作为优选的技术方案：
如上所述的一种提高网络复丝网络牢度的方法，所述丝道的直径为2.5～3mm，所述喷口I与所述喷口II的结构相同，孔径均为0.5～1mm，所述孔x的中心轴线在所述丝道的横截面上的投影线与所述横截面的中心点之间的距离0.5～0.8mm。
如上所述的一种提高网络复丝网络牢度的方法，喷口I向丝道A内射入气流的压强为0.1～0.3MPa，喷口II向丝道B内射入气流的压强为0.05～0.08MPa。
如上所述的一种提高网络复丝网络牢度的方法，d的取值范围为18～20mm，v的取值范围为30～50m/s。
如上所述的一种提高网络复丝网络牢度的方法，预加张力为0.01～0.05N。该预加张力的设置目的是：由于添加了喂给罗拉和引纱罗拉，复丝在丝道内是伸直状态，预加张力太大，会影响单丝的穿插、转移。
如上所述的一种提高网络复丝网络牢度的方法，t 1为0.1～0.3ms。
如上所述的一种提高网络复丝网络牢度的方法，所述网络复丝的规格为3～15tex/10～40F。
如上所述的一种提高网络复丝网络牢度的方法，所述网络复丝在纵向长度方向上由连续的若干个循环单元组成；每个循环单元是由顺序连接的开纤部和交络部组成。
如上所述的一种提高网络复丝网络牢度的方法，所述网络复丝的网络牢度为97～99％。
有益效果
与现有技术相比，本发明的一种提高网络复丝网络牢度的方法具有以下优点：
(1)本发明的一种提高网络复丝网络牢度的方法所形成的网络复丝的网络牢度高，网络后的复丝在织造时网络结不易松开，可以达到不加捻、不上浆即可织造，缩短了织造工艺流程；
(2)本发明的一种提高网络复丝网络牢度的方法，工艺简单，所用网络喷嘴加工加工方便，较易实现，适用范围广。
附图说明
图1为提高网络复丝网络牢度的装置结构示意图；
图2为喷嘴的剖面结构示意图；
其中，1-未经网络作用的复丝，2-张力器，3-喂给罗拉，4-喂给皮辊，5-喷嘴，6-丝道A，7-丝道B，8-引纱罗拉，9-引纱皮辊，10-卷绕罗拉，11-喷口I，12-喷口II。
具体实施方式
下面结合具体实施方式，进一步阐述本发明。应理解，这些实施例仅用于说明本发明而不用于限制本发明的范围。此外应理解，在阅读了本发明讲授的内容之后，本领域技术人员可以对本发明作各种改动或修改，这些等价形式同样落于本申请所附权利要求书所限定的范围。
实施例1
一种提高网络复丝网络牢度用的喷嘴，其结构如下：
如图2所示，喷嘴是由一立方体结构(金属材质)加工形成，所述立方体上，面a和面a’相互平行，面b和面b’相互平行，面c和面c’相互平行；所述加工是指在面c上开设贯通面b和面b’的槽w、槽v和槽u，在面a上开设延伸至面a’的直径为2.5～3mm的通孔，通孔穿过槽w、槽v和槽u并作为所述喷嘴的丝道，其中槽w和槽v之间的一部分丝道记为丝道A6，槽v和槽u之间的一部分丝道记为丝道B 7；在面b上开设与所述丝道A连通的孔x，所述孔x与所述丝道A的连接面完全落入所述丝道A的侧壁上；在面b’上开设有与所述丝道B连通的孔y，所述孔y与所述丝道B的连接面完全落入所述丝道B的侧壁上；所述孔x的中心轴线和所述孔y的中心轴线均与所述丝道的中心轴线异面垂直，所述孔x的中心轴线和所述孔y的中心轴线在所述丝道的横截面上的投影线相互平行且相较于横截面的中心点对称；x作为丝道A的喷口I 11，孔y作为丝道B的喷口II 12；喷口I与喷口II的结构相同，孔径均为0.5～1mm；孔x的中心轴线在丝道的横截面上的投影线与所述横截面的中心点之间的距离0.5～0.8mm。
实施例2
一种提高网络复丝的网络牢度的方法，其网络方法如下：
(1)原料准备A：未经网络作用的规格为25tex/40F的涤纶POY；
(2)以A为复丝原料，采用DTY工艺进行纺丝：如图1所示，未经网络作用的涤纶POY 1经张力器2调整预加张力后，由喂给罗拉3和喂给皮辊4握持后喂入并穿过喷嘴5(实施例1中的结构)的丝道，由引纱罗拉8和引纱皮辊9握持引出，并由卷绕罗拉10卷绕，制成规格为15tex/40F的网络复丝；
其中，喂给罗拉和喂给皮辊之间的握持点与引纱罗拉和引纱皮辊之间的握持点之间的连线与丝道的中心轴线重合，且喂给罗拉和引纱罗拉的线速度相等；当复丝穿过喷嘴的丝道时，喷口I和喷口II分别向丝道A和丝道B内间歇射入压缩气流(即在丝道A内，复丝先经喷口I射入的气流的网络作用，再 在丝道B内经喷口II射入的气流的网络作用)；喷口I向丝道A内射入气流的时间为t 1，经过△t后，喷口II开始向丝道B内射入气流，射入的时间为t 2；其中t 1和t 2相等，△t＝d/v，d为所述喷口I与所述喷口II的中心轴线之间的水平距离，v为引纱罗拉的线速度；喷口Ⅰ向丝道内射入压缩气流的压强大于喷口Ⅱ向丝道内射入压缩气流的压强；具体的工艺参数和喷嘴的结构参数设置如下：
预加张力为0.05N；
丝道直径为3mm
喷口直径为1mm
t 1为0.3ms；
d为18mm；
v为35m/s；
喷口I向丝道A内射入气流的压强为0.3MPa；
喷口II向丝道B内射入气流的压强为0.05MPa；
制得的网络复丝在纵向长度方向上由连续的若干个循环单元组成，每个循环单元是由顺序连接的开纤部和交络部组成；网络复丝的网络牢度为99％。
实施例3
一种提高网络复丝的网络牢度的方法，其网络方法如下：
(1)原料准备A：未经网络作用的规格为17tex/30F的涤纶POY；
(2)以A为复丝原料，采用DTY工艺进行纺丝：如图1所示，未经网络作用的涤纶POY 1经张力器2调整预加张力后，由喂给罗拉3和喂给皮辊4握持后喂入并穿过喷嘴5(实施例1中的结构)的丝道，由引纱罗拉8和引纱皮辊9握持引出，并由卷绕罗拉10卷绕，制成规格为10tex/30F的网络复丝；
其中，喂给罗拉和喂给皮辊之间的握持点与引纱罗拉和引纱皮辊之间的握持点之间的连线与丝道的中心轴线重合，且喂给罗拉和引纱罗拉的线速度相等；当复丝穿过喷嘴的丝道时，喷口I和喷口II分别向丝道A和丝道B内间歇射入压缩气流(即在丝道A内，复丝先经喷口I射入的气流的网络作用，再在丝道B内经喷口II射入的气流的网络作用)；喷口I向丝道A内射入气流的时间为t 1，经过△t后，喷口II开始向丝道B内射入气流，射入的时间为t 2；其中t 1和t 2相等，△t＝d/v，d为所述喷口I与所述喷口II的中心轴线之间的水平距离，v为引纱罗拉的线速度；喷口Ⅰ向丝道内射入压缩气流的压强大于喷口Ⅱ向丝道内射入压缩气流的压强；具体的工艺参数和喷嘴的结构参数设置如下：
预加张力为0.01N；
丝道直径为2.5mm
喷口直径为0.5mm
t 1为0.2ms；
d为20mm；
v为50m/s；
喷口I向丝道A内射入气流的压强为0.1MPa；
喷口II向丝道B内射入气流的压强为0.08MPa；
制得的网络复丝在纵向长度方向上由连续的若干个循环单元组成，每个循环单元是由顺序连接的开纤部和交络部组成；网络复丝的网络牢度为97％。
实施例4
一种提高网络复丝的网络牢度的方法，其网络方法如下：
(1)原料准备A：未经网络作用的规格为20tex/35F的涤纶POY；
(2)以A为复丝原料，采用DTY工艺进行纺丝：如图1所示，未经网络作用的涤纶POY 1经张力器2调整预加张力后，由喂给罗拉3和喂给皮辊4握持后喂入并穿过喷嘴5(实施例1中的结构)的丝道，由引纱罗拉8和引纱皮辊9握持引出，并由卷绕罗拉10卷绕，制成规格为12tex/35F的网络复丝；
其中，喂给罗拉和喂给皮辊之间的握持点与引纱罗拉和引纱皮辊之间的握持点之间的连线与丝道的中心轴线重合，且喂给罗拉和引纱罗拉的线速度相等；当复丝穿过喷嘴的丝道时，喷口I和喷口II分别向丝道A和丝道B内间歇射入压缩气流(即在丝道A内，复丝先经喷口I射入的气流的网络作用，再在丝道B内经喷口II射入的气流的网络作用)；喷口I向丝道A内射入气流的时间为t 1，经过△t后，喷口II开始向丝道B内射入气流，射入的时间为t 2；其中t 1和t 2相等，△t＝d/v，d为所述喷口I与所述喷口II的中心轴线之间的水平距离，v为引纱罗拉的线速度；喷口Ⅰ向丝道内射入压缩气流的压强大于喷口Ⅱ向丝道内射入压缩气流的压强；具体的工艺参数和喷嘴的结构参数设置如下：
预加张力为0.01N；
丝道直径为3mm
喷口直径为0.5mm
t 1为0.1ms；
d为20mm；
v为50m/s；
喷口I向丝道A内射入气流的压强为0.1MPa；
喷口II向丝道B内射入气流的压强为0.08MPa；
制得的网络复丝在纵向长度方向上由连续的若干个循环单元组成，每个循环单元是由顺序连接的开纤部和交络部组成；网络复丝的网络牢度为98％。
实施例5
一种提高网络复丝的网络牢度的方法，其网络方法如下：
(1)原料准备A：未经网络作用的规格为14tex/20F的涤纶POY；
(2)以A为复丝原料，采用DTY工艺进行纺丝：如图1所示，未经网络作用的涤纶POY 1经张力器2调整预加张力后，由喂给罗拉3和喂给皮辊4握持后喂入并穿过喷嘴5(实施例1中的结构)的丝道，由引纱罗拉8和引纱皮辊9握持引出，并由卷绕罗拉10卷绕，制成规格为8tex/20F的网络复丝；
其中，喂给罗拉和喂给皮辊之间的握持点与引纱罗拉和引纱皮辊之间的握持点之间的连线与丝道的中心轴线重合，且喂给罗拉和引纱罗拉的线速度相等；当复丝穿过喷嘴的丝道时，喷口I和喷口II分别向丝道A和丝道B内间歇射入压缩气流(即在丝道A内，复丝先经喷口I射入的气流的网络作用，再在丝道B内经喷口II射入的气流的网络作用)；喷口I向丝道A内射入气流的时间为t 1，经过△t后，喷口II开始向丝道B内射入气流，射入的时间为t 2；其中t 1和t 2相等，△t＝d/v，d为所述喷口I与所述喷口II的中心轴线之间的水平距离，v为引纱罗拉的线速度；喷口Ⅰ向丝道内射入压缩气流的压强大于喷口Ⅱ向丝道内射入压缩气流的压强；具体的工艺参数和喷嘴的结构参数设置如下：
预加张力为0.05N；
丝道直径为2.5mm
喷口直径为1mm
t 1为0.3ms；
d为18mm；
v为30m/s；
喷口I向丝道A内射入气流的压强为0.3MPa；
喷口II向丝道B内射入气流的压强为0.05MPa；
制得的网络复丝在纵向长度方向上由连续的若干个循环单元组成，每个循环单元是由顺序连接的开纤部和交络部组成；网络复丝的网络牢度为99％。
对比例1
一种网络复丝的网络方法，其操作基本同实施例2，不同之处仅在于：喷口II中不射入压缩气流；
制得的网络复丝的网络牢度为87％。将对比例1和实施例2进行对比可以看出，对比例1的网络牢度下降，这是因为当喷口II不射入压缩气流时，复丝仅受到喷口I射入的压缩气流的作用，其网络牢度和现有技术的网络牢度处于同一水平。
对比例2
一种网络复丝的网络方法，其操作基本同实施例2，不同之处仅在于：喷口Ⅰ向丝道内射入压缩气 流的压强等于喷口Ⅱ向丝道内射入压缩气流的压强，均为0.3mpa；
制得的网络复丝的网络牢度为82％。将对比例2和实施例2进行对比可以看出，对比例2的网络牢度下降，这是因为喷口I向丝道内射入压缩气流的压强等于喷口II向丝道内射入压缩气流的压强时，由于两股气流的方向相反，压强相同，喷口II射入的气流对喷口I形成的网络结的解捻作用较强，反而会降低网络牢度。
对比例3
一种网络复丝的网络方法，其操作基本同实施例2，不同之处仅在于：采用的喷嘴的结构与实施例1之间存在区别，即孔x的中心轴线在丝道的横截面上的投影线与所述横截面的中心点之间的距离为0。
制得的网络复丝的网络牢度为83％。将对比例3和实施例2进行对比可以看出，对比例3的网络牢度下降，这是因为当喷口I和喷口II射入气流的方向都对准丝道的中心位置时，气流的作用会直接作用于复丝的中心，位于中心区域的气流会向两边扩散，从而比较混合且形成的涡流形态不稳定，导致所形成的交缠、打结作用较弱，因此，网路牢度相对较低。
对比例4
一种网络复丝的网络方法，其操作基本同实施例2，不同之处仅在于：采用的喷嘴的结构与实施例1之间存在区别，即所述孔x的中心轴线和所述孔y的中心轴线在所述丝道的横截面上的投影线相互平行且相较于横截面的中心点不对称，且孔x的中心轴线在丝道的横截面上的投影线与所述横截面的中心点之间的距离为0，而孔y的中心轴线在丝道的横截面上的投影线与所述横截面的中心点之间的距离同实施例1。
制得的网络复丝的网络牢度为88％。将对比例4和实施例2进行对比可以看出，对比例4的网络牢度下降，这是因为当喷口I中的气流对准复丝的中心，而喷口Ⅱ吹一侧单丝时，由于喷口I射入气流的压强较大，且作用于复丝的中心位置，形成的涡流效应较差，单丝在气流I作用下的转移，交缠较弱，因此网路牢度较低。
对比例5
一种网络复丝的网络方法，其操作基本同实施例2，不同之处仅在于：采用的喷嘴的结构与实施例1之间存在区别，即所述孔x的中心轴线和所述孔y的中心轴线在所述丝道的横截面上的投影线相互平行且相较于横截面的中心点不对称，且孔x的中心轴线在丝道的横截面上的投影线与所述横截面的中心点之间的距离同实施例1，而孔y的中心轴线在丝道的横截面上的投影线与所述横截面的中心点之间的距离为0。
制得的网络复丝的网络牢度为90％。将对比例5和实施例2进行对比可以看出，对比例5的网络牢度下降，这是因为当喷口Ⅰ的气流对准一侧单丝，而喷口Ⅱ的气流对准复丝的中间位置时，其作用原理 与对比例4的作用原理是一致的，不过由于喷口Ⅰ吹一侧时比喷口Ⅱ吹一侧时形成的涡流作用要强，因此对比例5的网络牢度大于对比例4。
对比例6
一种网络复丝的网络方法，其操作基本同实施例2，不同之处仅在于：采用的喷嘴的结构与实施例1之间存在区别，即所述孔x和孔y都是在面b上形成。
制得的网络复丝的网络牢度为92％。将对比例6和实施例2进行对比可以看出，对比例6的网络牢度下降，这是因为当喷口Ⅰ和喷口Ⅱ射入气流的方向相同，对网络结的网络方向是相同的，无反向的纠缠、打结作用，则网络牢度会降低。

Claims (9)

  1. 一种提高网络复丝的网络牢度的方法，采用DTY纺丝工艺，其特征是：未经网络作用的复丝经张力器调整预加张力后由喂给罗拉和喂给皮辊握持后喂入并穿过喷嘴的丝道，由引纱罗拉和引纱皮辊握持引出，并由卷绕罗拉卷绕即得所述网络复丝；
    喷嘴是由一立方体结构加工形成，所述立方体上，面a和面a’相互平行，面b和面b’相互平行，面c和面c’相互平行；所述加工是指在面c上开设贯通面b和面b’的槽w、槽v和槽u，在面a上开设延伸至面a’的通孔，通孔穿过槽w、槽v和槽u并作为所述喷嘴的丝道，其中槽w和槽v之间的一部分丝道记为丝道A，槽v和槽u之间的一部分丝道记为丝道B；在面b上开设与所述丝道A连通的孔x，所述孔x与所述丝道A的连接面完全落入所述丝道A的侧壁上；在面b’上开设有与所述丝道B连通的孔y，所述孔y与所述丝道B的连接面完全落入所述丝道B的侧壁上；所述孔x的中心轴线和所述孔y的中心轴线均与所述丝道的中心轴线异面垂直，所述孔x的中心轴线和所述孔y的中心轴线在所述丝道的横截面上的投影线相互平行且相较于横截面的中心点对称；x作为丝道A的喷口I，孔y作为丝道B的喷口II；
    喂给罗拉和喂给皮辊之间的握持点与引纱罗拉和引纱皮辊之间的握持点之间的连线与丝道的中心轴线重合，且喂给罗拉和引纱罗拉的线速度相等；
    复丝穿过喷嘴的丝道时，喷口I和喷口II分别向丝道A和丝道B内间歇射入压缩气流；喷口I向丝道A内射入气流的时间为t 1，经过△t后，喷口II开始向丝道B内射入气流，射入的时间为t 2，其中t 1和t 2相等；其中，△t＝d/v，d为所述喷口I与所述喷口II的中心轴线之间的水平距离，v为引纱罗拉的线速度；
    喷口Ⅰ向丝道内射入压缩气流的压强大于喷口Ⅱ向丝道内射入压缩气流的压强。
  2. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，所述丝道的直径为2.5～3mm，所述喷口I与所述喷口II的结构相同，孔径均为0.5～1mm，所述孔x的中心轴线在所述丝道的横截面上的投影线与所述横截面的中心点之间的距离0.5～0.8mm。
  3. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，喷口I向丝道A内射入气流的压强为0.1～0.3MPa，喷口II向丝道B内射入气流的压强为0.05～0.08MPa。
  4. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，d的取值范围为18～20mm，v的取值范围为30～50m/s。
  5. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，预加张力为0.01～0.05N。
  6. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，t 1为0.1～0.3ms。
  7. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，所述网络复丝的规格为3～15tex/10～40F。
  8. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，所述网络复丝在纵向长度方向上由连续的若干个循环单元组成；每个循环单元是由顺序连接的开纤部和交络部组成。
  9. 根据权利要求1所述的一种提高网络复丝网络牢度的方法，其特征在于，所述网络复丝的网络牢度为97～99％。
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