Interlaced composite yarn and interlacing method

Abstract

The objective of the present invention is to provide an interlaced composite yarn and an interlacing method. The interlaced composite yarn in the present invention includes a plurality of cycle segments along the longitudinal direction as interlaced filaments, and each cycle segment is composed of a spread section I, an entangled section I, a spread section II, and an entangled section II arranged in order, and the entangled strength of the entangled section I and the entangled section II are different. In the manufacturing method, the filaments are sequentially subjected to an initial tension by a tensioner adjuster, pass through a yarn guide tube of a nozzle, and are wound up by a take-up roller to become an interlaced composite yarn. Furthermore, the nozzle is provided with an injection port I and an injection port II, and when the multifilament passes through the yarn guide tube of the nozzle, compressed air is intermittently injected by the injection port I and the injection port II, and the single airflow injection time of the injection port I and the injection port II is the same, the intermittent time is the same, and the injection airflow pressure of the injection port I is higher than the injection airflow pressure of the injection port II. The present invention expands the application range of the interlaced yarn.

Description

[Technical field]

[0001] The present invention relates to the field of spinning technology, and in particular to an interlaced composite yarn and an interlacing processing method and application. [Background technology]

[0002] Interlacing is a widely applied and mature technology in chemical fiber manufacturing, with high practicality and potential. For example, interlacing in DTY (Drawn Textured Yarn) production is a method for efficiently increasing the bundling of filaments, which does not require twisting or sizing processes, and simplifies the processing process while giving the yarn a wool-like texture. Interlacing is a process in which high-pressure air is blown into a jet nozzle to entangle the filaments, forming open and entangled parts at regular intervals in the yarn. Current research on interlacing mainly focuses on processing parameters, interlacer dimensions, processing principles, etc. Energy saving, ease of use, high adaptability, and excellent product quality have become the mainstream of interlacing technology development, and in particular, research on nozzle modularization aimed at the combination of interlacing and oiling is currently hot. However, the function of the interlacer to date is relatively single, and the texture of interlaced products is poorly varied, so the applicability of the technology is still insufficient. Summary of the Invention [Problem to be solved by the invention]

[0003] To make up for the shortcomings in the prior art, the present invention provides an interlaced composite yarn and an interlacing method and application. [Means for solving the problem]

[0004] The proposal of the present invention is as follows. The interlaced composite yarn includes a plurality of cycle segments along the longitudinal direction as interlaced filaments, and further includes spread portions I, entangled portions I, spread portions II, and entangled portions II, which are arranged in order, and the entanglement strengths of entangled portions I and II are different.

[0005] The principle is that in interlaced yarn, the original parallel monofilaments are separated into multiple bulky open sections when subjected to the impact force of the airflow from the nozzle, and the parts between them become entangled with each other due to the vortex current, forming knots, or entangled sections.

[0006] There are two indicators for evaluating interlaced yarn. The first is the number of entanglements N, which indicates the number of entanglements per unit length (m). The second is the entanglement strength S, defined as Nr / N, where Nr is the residual number of entanglements after applying a load of 132mN / tex to a unit length of yarn for 3 minutes. The evaluation method is based on the Chinese industrial standard FZ / T 50001-2005 "Method for measuring the number of entanglements in synthetic fibers."

[0007] Preferably, in the interlaced composite yarn, the entanglement strength of the entangled portion I is 85 to 95%, and the entanglement strength of the entangled portion II is 40 to 60%; the number of entanglements of the entangled portion I is 20 to 50, and the number of entanglements of the entangled portion II is 20 to 50; the length of the entangled portion I is 7 to 15 mm, the length of the spread portion I is 3 to 10 mm, the length of the entangled portion II is 7 to 15 mm, and the length of the spread portion II is 3 to 10 mm; and the filaments are standard ultrafine DTY of 3 to 15 tex / 10 to 40 F.

[0008] The present invention also provides a method for processing the interlaced composite yarn. That is, the filaments are sequentially subjected to an initial tension by a tensioner adjuster, passed through a yarn guide tube of a nozzle, and wound up by a take-up roller to become an interlaced composite yarn. The nozzle is a processed cube (generally made of metal), in which face a and face a', face b and face b', and face c and face c' are parallel to each other; the processing described above means that grooves w and v are dug from face c through face b and face b', a through hole is opened from face a to face a', and the through hole passes through groove w and groove w to become a yarn guide tube, holes x and y are opened from face b or face b' to the through hole, hole x becomes nozzle I and hole y becomes nozzle II, and the distance between the central axis of hole x and the central axis of hole y is 5 to 10 mm.

[0009] When the multifilament passes through the yarn guide tube of the nozzle, compressed air is intermittently injected by nozzle I and nozzle II (i.e., the multifilament traveling through the yarn guide tube is subjected to the intertwining action of the airflow from nozzle I and nozzle II in turn). Specifically, the airflow injection from nozzle II starts after a time T1 has elapsed from the end of the airflow injection from nozzle I, and the airflow injection from nozzle I resumes after a time T2 has elapsed from the end of the airflow injection from nozzle II. Furthermore, the single airflow injection time from nozzle I and nozzle II is the same, T1 and T2 are the same, the linear velocity of the take-up roller is 30 to 50 m / s, and the input airflow pressure from nozzle I is greater than the input airflow pressure from nozzle II.

[0010] As the multifilament passes through the nozzle's yarn conduit, the central longitudinal axis of the yarn overlaps with the central longitudinal axis of the yarn conduit.

[0011] The interlaced composite yarn and its manufacturing method in the present invention relate to the entanglement effect by two jets devised in a nozzle. The two jets mentioned above are arranged side by side at an interval and face the central axis of the yarn guide tube together, but the input air pressure of jet I is greater than that of jet II, so the entanglement strength by the airflow of jet I is higher than that of jet II, and the airflow input of jet I and jet II is intermittent, but the input frequency is the same. Therefore, by controlling the linear speed of the take-up roller, the interlaced filaments have a structure that changes periodically in the longitudinal direction. One period is composed of the spread portion I, the entangled portion I, the spread portion II, and the entangled portion II, among which the entangled portion I is formed by the jet portion I and the entangled portion II is formed by the jet portion II, so that the entangled strength of the entangled portion I is higher than that of the entangled portion II.

[0012] Preferably, in the method for producing an interlaced composite yarn, the single airflow injection time of nozzle I and nozzle II is both 0.1-0.2 ms, T1 and T2 are both 0.225-0.3 ms; the input airflow pressure of nozzle I is 0.2-0.3 MPa, and the input airflow pressure of nozzle II is 0.05-0.1 MPa; nozzles I and II are located on the same side of the nozzle, have central axes perpendicular to the central axis of the yarn guide tube, and have the same structure, and the initial tension that the filament receives from the tension adjuster is 0.05-0.15 N.

[0013] The present invention also provides one application of the interlaced composite yarn, that is, the interlaced composite yarn is used as a warp yarn to weave a fabric.

[0014] The interlaced composite yarn of the present invention, which includes interlacing part I and interlacing part II with different interlacing strength, is more likely to loosen due to friction between the heddle and the reed when it is used as a warp yarn, and the warp yarn in the obtained fabric is intermittently tightened and loosened, which should have different light reflection. Therefore, although the surface of the fabric is actually flat, the thickness of the warp yarn is randomly distributed, making the surface look uneven. Fabrics with such texture can be used in the fields of fabrics such as clothing and decoration. Effect of the Invention

[0015] The present invention broadens the scope of application of interlaced yarns compared with the prior art. In addition to the effect of eliminating the need for the twisting and sizing processes of interlaced yarns as in the prior art, the interlaced composite yarn of the present invention includes interlaced parts with different interlacing strengths, and when used as a warp yarn to weave a fabric, the parts with low interlacing strength tend to loosen, giving the resulting fabric different textures such as gloss and apparent flatness. [Brief description of the drawings]

[0016] [Figure 1] FIG. 1 is a schematic diagram showing the structure of an interlaced composite yarn of the present invention. [Diagram 2] FIG. 2 is a schematic diagram showing the processing steps of the interlaced composite yarn of the present invention. [Diagram 3] FIG. 2 is a three-dimensional structural diagram of an interlace nozzle according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] The present invention will be described in more detail below with reference to examples, but the present invention is not limited to the following examples as long as it does not exceed the gist of the present invention. Even if various modifications of the present invention are permitted by a person skilled in the art who has read the contents of the present invention, they are also limited within the scope of the claims of the present invention as equivalent forms of the present invention.

[0018] Example 1 The nozzle for interlaced composite yarn has the following structure: Referring to FIG. 3, the nozzle is a machined cube (generally made of a metal material), in which faces a and a', b and b', and c and c' are parallel to each other; grooves w and v are dug from face c through faces b and b', a through hole is drilled from face a to face a', and the through hole passes through grooves w and w to become a yarn (diameter 2.5 to 3 mm) passage 9, holes x and y are drilled from face b or face b' to the through hole, hole x becomes nozzle I 10 and hole y becomes nozzle II 11, nozzles I and II are located on the same side of the nozzle, have central axes perpendicular to the central axis of the yarn passage, and have the same structure (the hole diameters are all 1 to 1.5 mm), and the distance between the central axis of hole x and the central axis of hole y is 5 to 10 mm.

[0019] Example 2 The method for producing the interlaced composite yarn is as follows: (1) As shown in Figure 2, the standard 3tex / 10F ultra-fine DTY is subjected to an initial tension of 0.05N from the tension adjuster 6, passes through the nozzle's yarn guide tube 9, and is wound up by the take-up roller 8 to become the interlaced composite yarn 1; Wherein, the structure of the nozzle is as described in Example 1. More specifically, the distance between the central axis of hole x and the central axis of hole y is 5 mm, the diameter of hole x and hole y is 1 mm, and the diameter of the yarn guide tube is 2.5 mm; when the multifilament A passes through the yarn guide tube of the nozzle, compressed air is intermittently injected through nozzles I and II (i.e., the multifilament running through the yarn guide tube is subjected to the intertwining action of the airflow from nozzles I and II in turn). Specifically, nozzle I the airflow injection of nozzle I starts after a time T1 from the end of the airflow injection of nozzle II, and the airflow injection of nozzle I resumes after a time T2 from the end of the airflow injection of nozzle II; the single airflow injection time of nozzle I and nozzle II is both 0.1ms, T1 and T2 are both 0.233ms, the input airflow pressure of nozzle I is 0.2MPa, the input airflow pressure of nozzle II is 0.05MPa, and the linear velocity of the take-up roller is 30m / s; (2) The obtained interlaced composite yarn 1 is composed of a plurality of cycle segments along the longitudinal direction thereof, and referring to FIG. 1 , any of the cycle segments includes a spread portion I2, an entangled portion I3, a spread portion II4, and an entangled portion II5, which are connected in sequence, and further, the length of the spread portion I is 3 mm, the length of the entangled portion I is 7 mm, the length of the spread portion II is 3 mm, the length of the entangled portion II is 7 mm, the number of entanglements in the entangled portion I is 50, and the number of entanglements in the entangled portion II is 50, The interlacing strength of interlacing section I is 85%, and the interlacing strength of interlacing section II is 40%; (3) In fabrics woven using the interlaced composite yarn as the warp thread, the warp threads are tightened and loosened intermittently, which causes them to reflect light differently, resulting in a random distribution of warp thread thickness and an uneven surface.

[0020] Example 3 The method for producing the interlaced composite yarn is as follows: (1) As shown in FIG. 2, the standard 5tex / 15F extra fine DTY is subjected to an initial tension of 0.08N from the tension adjuster 6, passes through the nozzle's yarn guide tube 9, and is wound up by the take-up roller 8 to become the interlaced composite yarn 1; Wherein, the structure of the nozzle is as described in Example 1. More specifically, the distance between the central axis of hole x and the central axis of hole y is 7 mm, the diameters of holes x and y are 1.1 mm, and the diameter of the yarn guide tube is 2.7 mm; when the multifilament A passes through the yarn guide tube of the nozzle, compressed air is intermittently injected through nozzles I and II (i.e., the multifilament running through the yarn guide tube is subjected to the intertwining action of the airflow from nozzles I and II in turn). Specifically, nozzle I the airflow injection of nozzle I starts after a time T1 from the end of the airflow injection of nozzle II, and the airflow injection of nozzle I resumes after a time T2 from the end of the airflow injection of nozzle II; the single airflow injection time of nozzle I and nozzle II is both 0.125ms, T1 and T2 are both 0.225ms, the input airflow pressure of nozzle I is 0.22MPa, the input airflow pressure of nozzle II is 0.07MPa, and the linear velocity of the take-up roller is 40m / s; (2) The obtained interlaced composite yarn 1 is composed of a plurality of cycle segments along the longitudinal direction thereof, and referring to FIG. 1 , any of the cycle segments includes a spread portion I2, an entangled portion I3, a spread portion II4, and an entangled portion II5, which are sequentially connected, and further, the length of the spread portion I is 5 mm, the length of the entangled portion I is 9 mm, the length of the spread portion II is 5 mm, the length of the entangled portion II is 9 mm, the number of entanglements in the entangled portion I is 36, and the number of entanglements in the entangled portion II is 36, The interlacing strength of interlacing section I is 88%, and the interlacing strength of interlacing section II is 44%; (3) In fabrics woven using the interlaced composite yarn as the warp thread, the warp threads are tightened and loosened intermittently, which causes them to reflect light differently, resulting in a random distribution of warp thread thickness and an uneven surface.

[0021] Example 4 The method for producing the interlaced composite yarn is as follows: (1) As shown in FIG. 2, the standard 8tex / 22F extra fine DTY is subjected to an initial tension of 0.1N by the tension adjuster 6, passes through the nozzle's yarn guide tube 9, and is wound by the take-up roller 8 to become the interlaced composite yarn 1; Wherein, the structure of the nozzle is as described in Example 1. More specifically, the distance between the central axis of the hole x and the central axis of the hole y is 8 mm, the diameters of the holes x and y are 1.2 mm, and the diameter of the yarn guide tube is 2.8 mm; when the multifilament A passes through the yarn guide tube of the nozzle, compressed air is intermittently injected through the nozzle I and the nozzle II (i.e., the multifilament running through the yarn guide tube is subjected to the intertwining action of the airflow from the nozzle I and the nozzle II in turn). Specifically, the nozzle After the end of the airflow injection of I, the airflow injection of nozzle II starts after a time T1, and after the end of the airflow injection of nozzle II, the airflow injection of nozzle I resumes after a time T2, the single airflow injection time of nozzle I and nozzle II is both 0.2ms, T1 and T2 are both 0.286ms, the input airflow pressure of nozzle I is 0.25MPa, the input airflow pressure of nozzle II is 0.08MPa, and the linear velocity of the take-up roller is 35m / s; (2) The obtained interlaced composite yarn 1 is composed of a plurality of cycle segments along its longitudinal direction, and referring to FIG. 1 , any of the cycle segments includes a spread portion I2, an entangled portion I3, a spread portion II4, and an entangled portion II5, which are sequentially connected, and further, the length of the spread portion I is 7 mm, the length of the entangled portion I is 10 mm, the length of the spread portion II is 7 mm, the length of the entangled portion II is 10 mm, the number of entanglements in the entangled portion I is 30, the number of entanglements in the entangled portion II is 30, the entanglement strength of the entangled portion I is 90%, and the entanglement strength of the entangled portion II is 50%; (3) In fabrics woven using the interlaced composite yarn as the warp thread, the warp threads are tightened and loosened intermittently, which causes them to reflect light differently, resulting in a random distribution of warp thread thickness and an uneven surface.

[0022] Example 5 The method for producing the interlaced composite yarn is as follows: (1) As shown in FIG. 2, the standard 12tex / 30F extra fine DTY is subjected to an initial tension of 0.12N from the tension adjuster 6, passes through the nozzle's yarn guide tube 9, and is wound up by the take-up roller 8 to become the interlaced composite yarn 1; Wherein, the structure of the nozzle is as described in Example 1. More specifically, the distance between the central axis of hole x and the central axis of hole y is 9 mm, the diameters of holes x and y are 1.4 mm, and the diameter of the yarn guide tube is 3 mm; when the multifilament A passes through the yarn guide tube of the nozzle, compressed air is intermittently injected through nozzles I and II (i.e., the multifilament running through the yarn guide tube is subjected to the intertwining action of the airflow from nozzles I and II in turn). Specifically, the nozzle I After the end of the airflow injection, the airflow injection of nozzle II starts at time T1, and after the end of the airflow injection of nozzle II, the airflow injection of nozzle I resumes at time T2, the single airflow injection time of nozzle I and nozzle II is both 0.188ms, T1 and T2 are both 0.25ms, the input airflow pressure of nozzle I is 0.28MPa, the input airflow pressure of nozzle II is 0.09MPa, and the linear velocity of the take-up roller is 48m / s; (2) The obtained interlaced composite yarn 1 is composed of a plurality of cycle segments along its longitudinal direction, and referring to FIG. 1 , any of the cycle segments includes a spread portion I2, an entangled portion I3, a spread portion II4, and an entangled portion II5, which are sequentially connected, and further, the length of the spread portion I is 9 mm, the length of the entangled portion I is 12 mm, the length of the spread portion II is 9 mm, the length of the entangled portion II is 12 mm, the number of entanglements in the entangled portion I is 24, the number of entanglements in the entangled portion II is 24, the entanglement strength of the entangled portion I is 93%, and the entanglement strength of the entangled portion II is 55%; (3) In fabrics woven using the interlaced composite yarn as the warp thread, the warp threads are tightened and loosened intermittently, which causes them to reflect light differently, resulting in a random distribution of warp thread thickness and an uneven surface.

[0023] Example 6 The method for producing the interlaced composite yarn is as follows: (1) As shown in FIG. 2, the standard 15tex / 40F extra fine DTY is subjected to an initial tension of 0.15N from the tension adjuster 6, passes through the nozzle's yarn guide 9, and is wound up by the take-up roller 8 to become the interlaced composite yarn 1; Wherein, the structure of the nozzle is as described in Example 1. More specifically, the distance between the central axis of hole x and the central axis of hole y is 10 mm, the diameters of holes x and y are 1.5 mm, and the diameter of the yarn guide tube is 3 mm; when the multifilament A passes through the yarn guide tube of the nozzle, compressed air is intermittently injected through nozzles I and II (i.e., the multifilament running through the yarn guide tube is subjected to the intertwining action of the airflow from nozzles I and II in turn). Specifically, the injection After a time T1 from the end of the airflow injection of nozzle I, the airflow injection of nozzle II begins, and after a time T2 from the end of the airflow injection of nozzle II, the airflow injection of nozzle I resumes, the single airflow injection time of nozzle I and nozzle II is both 0.2ms, T1 and T2 are both 0.3ms, the input airflow pressure of nozzle I is 0.3MPa, the input airflow pressure of nozzle II is 0.1MPa, and the linear velocity of the take-up roller is 50m / s; (2) The obtained interlaced composite yarn 1 is composed of a plurality of cycle segments along its longitudinal direction, and referring to FIG. 1 , any of the cycle segments includes a spread portion I2, an entangled portion I3, a spread portion II4, and an entangled portion II5, which are sequentially connected, and further, the length of the spread portion I is 10 mm, the length of the entangled portion I is 15 mm, the length of the spread portion II is 10 mm, the length of the entangled portion II is 15 mm, the number of entanglements in the entangled portion I is 20, the number of entanglements in the entangled portion II is 20, the entanglement strength of the entangled portion I is 95%, and the entanglement strength of the entangled portion II is 60%; (3) In fabrics woven using the interlaced composite yarn as the warp thread, the warp threads are tightened and loosened intermittently, which causes them to reflect light differently, resulting in a random distribution of warp thread thickness and an uneven surface.

Claims

1. An interlaced composite yarn made of filaments that are interlaced multifilaments, It comprises a plurality of longitudinally consecutive cycle segments, Each cycle segment includes a spread portion I, an entangled portion I, a spread portion II, and an entangled portion II, which are connected in order, The intertwining portion I and the intertwining portion II have different intertwining strengths. An interlaced composite yarn.

2. The entanglement strength of the entangled portion I is 85 to 95%; The intertwining strength of the intertwining portion II is 40 to 60%. The interlaced composite yarn of claim 1 .

3. the filament is a fine denier DTY multifilament; The specifications for fine denier DTY multifilament are 3-15 tex / 10-40F. The interlaced composite yarn of claim 1 .

4. A method for interlacing the interlaced composite yarn according to any one of claims 1 to 3, comprising: A non-interlaced multifilament having a pretension adjusted by a tensor is passed through a yarn path of a nozzle, and the interlaced composite yarn is wound by a winding roller to form the interlaced composite yarn; The nozzle is formed by processing a cubic structure, and in the cubic structure, faces a and a', faces b and b', and faces c and c' are parallel to each other, respectively; The processing includes forming grooves w and v on face c, the grooves w and v penetrating face b and face b', a through hole is formed which communicates the surface a with the surface a′ and passes through the groove w and the groove v to serve as a yarn path for the nozzle; A hole x and a hole y communicating with the through hole are formed on the surface b or the surface b'; a connecting surface between the hole x and the through hole, and a connecting surface between the hole y and the through hole completely enter into a side wall of the through hole, Hole x is the nozzle orifice I, Hole y is the nozzle orifice II, the distance between the center point of the connection surface between hole x and the through hole and the center point of the connection surface between hole y and the through hole is 5 to 10 mm; When the multifilament passes through the yarn path of the nozzle, compressed airflows are intermittently sprayed onto the yarn path from nozzle I and nozzle II, an airflow is sprayed from nozzle II after a certain time interval T1 has elapsed after the airflow spray from nozzle I has finished, and an airflow is sprayed again from nozzle I after a certain time interval T2 has elapsed after the airflow spray from nozzle II has finished, the single airflow spraying time of nozzle I and nozzle II is the same, T1 and T2 are the same, the linear speed of the winding roller is 30 to 50 m / s, and the pressure of the airflow sprayed onto the yarn path from nozzle I is greater than the pressure of the airflow sprayed onto the yarn path from nozzle II. A method for interlacing an interlaced composite yarn, comprising:

5. The single airflow ejection time of nozzle I and nozzle II is 0.1 to 0.2 ms. T1 and T2 are both 0.225 to 0.3 ms. A method for interlacing the interlaced composite yarn according to claim 4.

6. The pressure of the airflow ejected from the nozzle I is 0.2 to 0.3 MPa. The pressure of the airflow ejected from nozzle II is 0.05 to 0.1 MPa. A method for interlacing the interlaced composite yarn according to claim 4.

7. The nozzle I and the nozzle II have the same structure and their central axes are both perpendicular to the central axis of the yarn path. A method for interlacing the interlaced composite yarn according to claim 4.

8. The pretension applied to the multifilament by the tensor is 0.05 to 0.15 N. A method for interlacing the interlaced composite yarn according to claim 4.

9. Use of the interlaced composite yarn according to any one of claims 1 to 3, A woven fabric is produced using the interlaced composite yarn as a weft.

2. Use of an interlaced composite yarn.

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