A fancy composite network yarn and its preparation method and implementation device

Abstract

The present invention belongs to the field of spinning technology, and relates to a fancy composite network yarn and a preparation method and implementation device thereof. The network yarn is composited by two filament multifilaments, and has irregularly arranged parallel parts and mixed parts in the longitudinal length, forming a variety of appearance effects. By controlling the airflow parameters and wire path design of the two network nozzles, the unstable mixing and entanglement of the filament multifilaments in the network process are achieved to form a unique network structure. The network yarn of the present invention not only improves the cohesion and weavability, but also enriches the appearance style of the fabric and broadens the application field of the filament fabric. The preparation method is simple, the device structure is reasonable, and it is easy to implement.

Description

Technical Field

[0001] The invention belongs to the technical field of spinning, and relates to a fancy composite network yarn and a preparation method and a realization device thereof. Background Art

[0002] In the production of chemical fiber filaments, network processing technology has developed quite maturely and is widely used, becoming a key technology to effectively improve the cohesion of chemical fiber filaments. Especially in the production process of DTY (drawn textured yarn), network processing technology achieves the purpose of no twisting and no sizing of the yarn, significantly shortening the overall process flow. At present, the research focus on filament network processing is mainly concentrated on the optimization of network processing parameters, the design of network device size and the in-depth exploration of network processing principles.

[0003] The core principle of network processing is that when the filament multifilament passes through the wire path of the network nozzle, it will be impacted by the jet airflow perpendicular to the direction of the tow, causing the tow to be dispersed and the filaments to be entangled with each other. This winding movement is carried out in two directions until it encounters resistance and stops stretching, thus forming a network point at the obstructed position. As the filament multifilament continues to advance, the network point formed at the front end maintains its entangled structure through the compressed air zone, while the rear tow is loosened and re-entangled when entering the new compressed air zone, and this cycle is repeated to form a continuous network cycle. The key to this process is the continuous supply of compressed air, which ensures the continuous generation of periodic network points.

[0004] The network nozzles used in the existing filament network processing technology (such as TMT-ATF-1500 network nozzles, DH-800 network nozzles, etc.) can only make the filament multifilaments produce a uniform network to increase the cohesion and improve its weaving performance. However, the internal structure of the filament multifilaments after networking is stable, and the appearance is single. There is no significant difference between the fabrics woven with it and the fabrics woven with the filament multifilaments without networking. On the other hand, when using filaments for weaving, since most filaments at this stage do not have the performance of short fiber yarns such as segmented color yarns and bamboo yarns with changeable appearance, the fabrics woven from filaments are usually uniform in surface and single in style, which to a certain extent affects the application of filament fabrics. Summary of the invention

[0005] The purpose of the present invention is to solve the problems existing in the prior art and to provide a fancy composite network yarn and a preparation method and a device thereof.

[0006] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A fancy composite network yarn is formed by a network composite of filament multifilament I and filament multifilament II, and the fancy composite network yarn is composed of a plurality of consecutive irregularly arranged parallel parts I, mixed parts I, parallel parts II and mixed parts II in the longitudinal length;

[0008] The parallel part I is composed of loose filament multifilament I and loose filament multifilament II; the parallel part II is composed of loose filament multifilament II and mutually entangled filament multifilament I; the mixed part I is composed of filament multifilament I and filament multifilament II mixed and entangled evenly; the mixed part II is composed of filament multifilament I and filament multifilament II mixed and entangled unevenly.

[0009] As the preferred technical solution:

[0010] As mentioned above, the fancy composite network yarn, the filament multifilament I and the filament multifilament II are both fine denier DTY multifilaments, and the specification parameters are the same, both are 3~8tex / 10~20F.

[0011] As described above, the fancy composite network yarn has the length of the parallel part I being 3.5~4mm, the length of the parallel part II being 3.5~4mm, the network strength of the filament multifilament I in the parallel part II being 50~60%, the length of the mixed part I being 3.5~4mm, the network strength of the mixed part I being 65~70%, the length of the mixed part II being 3.5~4mm, and the network strength of the mixed part II being 50~70%.

[0012] The present invention also provides a method for preparing a fancy composite network yarn as described in any of the above items. During the parallel continuous movement of filament multifilament I and filament multifilament II, the two are controlled to pass through two network nozzles that continuously spray airflow in turn. The two network nozzles are arranged at intervals. The first network nozzle is located on the rear side of the moving direction, and the airflow of the first network nozzle only acts on the filament multifilament I. The second network nozzle is located on the front side of the moving direction, and the airflow of the second network nozzle acts on the filament multifilament I and the filament multifilament II at the same time. The first network nozzle includes wire path I, and the second network nozzle includes wire path III. The length of wire path I is 10~15mm, and the length of wire path III is 35~50mm.

[0013] The principle of the network is that when the silk passes through the silk path in the network nozzle, it is laterally impacted by the high-pressure airflow ejected from the jet pipe perpendicular to the silk bundle or at a certain angle, and the fibers are blown apart and loosened, thereby obtaining fluffy properties. After entering the silk path, the high-pressure airflow is divided into three airflows. The middle airflow blows through the silk bundle and reaches the corresponding inner wall of the silk path. Under the action of the inner wall resistance, two weaker return airflows are generated. Then the two return airflows merge with the other two stronger airflows entering the silk path and are ejected from the outlets at both ends of the nozzle. Due to the convergence of these two strong and weak airflows, a turbulent airflow is formed in the silk path, causing the fibers in the silk path to entangle with each other, forming a dense network node.

[0014] During interlacing, continuous compressed air is introduced into the two interlacing nozzles; the filament multifilament I and filament multifilament II pass through Figure 2When the device is used, the airflow of the first network nozzle only acts on the filament multifilament I. The filament multifilament I is blown away by the airflow, and then entangled with each other under the action of the rotating vortex formed by the airflow. The wire path length of the first network nozzle is shorter. According to the network principle, the filament multifilament I will form more network knots in the first network nozzle. Therefore, after leaving the first network nozzle, the filament multifilament I is composed of a loose fiber opening part and a tangled intertwining part. Since the airflow of the first network nozzle does not act on the filament multifilament II, the filament multifilament II is still in a loose state after leaving the first network nozzle.

[0015] When the filament multifilament I that has been networked and the filament multifilament II that has not been networked are combined and enter the second network nozzle, the airflow of the second network nozzle will act on the filament multifilament I and the filament multifilament II at the same time. Since the filament multifilament I has been networked, the filament multifilament I is composed of a loose open fiber part and a tangled intertwined part. Therefore, the airflow of the second network nozzle only acts on the open fiber part of the filament multifilament I and the filament multifilament II. When the loose open fiber part of the filament multifilament I and the loose filament multifilament II are not affected by the airflow of the second network nozzle, a parallel part I is formed; when the loose open fiber part of the filament multifilament I and the loose filament multifilament II are affected by the airflow of the second network nozzle, the monofilaments in the loose open fiber part of the filament multifilament I and the monofilaments in the filament multifilament II are evenly entangled with each other to form a mixed part. The mixing section I is a network knot evenly distributed in the cross section of the yarn body; when the entangled intertwined section of the filament multifilament I and the loose filament multifilament II are not affected by the airflow of the second network nozzle, the parallel section II is formed; when the entangled intertwined section of the filament multifilament I and the loose filament multifilament II are affected by the airflow of the second network nozzle, the intertwined section of the filament multifilament I as a whole is entangled with the single filaments in the filament multifilament II to form a mixing section II, i.e., network knots unevenly distributed in the cross section of the yarn body are formed. In addition, the length of the silk path of the second network nozzle is longer. According to the network principle, the number of network knots formed in silk path II will be less, that is, the interval length between the two network knots will be longer, so the shape of the network knots formed in the second network nozzle is not fixed.

[0016] As the preferred technical solution:

[0017] In the method described above, the pressure of the airflow ejected by the first network nozzle is 1-1.2 kg / cm 2 The pressure of the airflow ejected by the second network nozzle is 1.5~2kg / cm 2The pressure of the airflow ejected by the first network nozzle is lower than the pressure of the airflow ejected by the second network nozzle. This is because in order to realize that the airflow of the first network nozzle only acts on the filament multifilament I and the airflow of the second network nozzle acts on the filament multifilament I and the filament multifilament II at the same time, it is necessary to design the outlet diameter of the second network nozzle to be larger than the first network nozzle. In order to ensure a better airflow effect, the pressure of the airflow ejected by the second network nozzle needs to be larger.

[0018] The present invention also provides a device for implementing the method described in any of the above items, comprising a shell and a first network nozzle and a second network nozzle simultaneously located in the shell; a wire path II is provided in the shell, the first network nozzle comprises a wire path I, and the second network nozzle comprises a wire path III; wire paths I, II and III are interconnected and arranged in sequence from left to right.

[0019] As the preferred technical solution:

[0020] In the device as described above, both wire path I and wire path III are prisms formed by moving a "D"-shaped bottom surface parallel to the front-to-back direction along the left-right direction, and "D" is composed of line segments and arcs. The line segments are located above the arcs and parallel to the front-to-back direction.

[0021] In the device as described above, the first network nozzle also includes an air chamber I and a jet tube I, which is connected to both the air chamber I and the silk path I, and the outlet of the jet tube I is located on one side of the central axis of the silk path I; the second network nozzle also includes an air chamber II and a jet tube II, which is connected to both the air chamber II and the silk path III, and the central axis of the jet tube II is perpendicular to and intersects with the central axis of the silk path III.

[0022] In the device as described above, both the injection tube I and the injection tube II are circular tubes, the inner diameter of the injection tube I is 1-1.2 mm, and the inner diameter of the injection tube II is 1.5-1.6 mm;

[0023] The vertical distance between the center of the outlet of the jet tube I and the central axis of the wire path I is 0.05-0.15 mm; the vertical distance between the center of the outlet of the jet tube II and the central axis of the wire path III is 0 mm;

[0024] Silk channel II is a cylinder formed by moving a circular bottom surface parallel to the front-rear direction in the left-right direction;

[0025] The equivalent circle diameter of wire channel I is 2.5~3mm; the length of wire channel II is 20~30mm and the diameter is 1~1.5mm; the equivalent circle diameter of wire channel III is 2~3mm;

[0026] The above parameters cooperate with each other to improve the network effect and network fastness of the final product.

[0027] Beneficial effects:

[0028] (1) The fancy composite network yarn of the present invention is composed of irregularly arranged parallel parts and mixed parts in the longitudinal length, has high cohesion and good weavability, enriches the appearance style of the fabric, and can be widely used in clothing, home decoration, industrial textiles and other fields.

[0029] (2) The present invention ensures that the filament multifilaments can form stable network nodes during the networking process by precisely controlling the air flow parameters and the wire path design of the two network nozzles, thereby improving the network fastness and enhancing the durability and stability of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of the fancy composite network yarn of Example 1 of the present invention (the figure only shows the sequence of the parallel part I, the mixed part I, the parallel part II, and the mixed part II of the fancy composite network yarn in the longitudinal length);

[0031] Figure 2 It is a schematic diagram of the three-dimensional structure of the device for preparing fancy composite network yarn of the present invention;

[0032] Figure 3 It is a front structural schematic diagram of the device for preparing fancy composite network yarn of the present invention;

[0033] Figure 4 It is a schematic diagram of the top view of the structure of the device for preparing fancy composite network yarn of the present invention;

[0034] Among them, 1-parallel part I, 2-mixing part I, 3-parallel part II, 4-mixing part II, 51-air chamber I, 52-air chamber II, 53-shell, 54-wire path I, 55-wire path II, 56-wire path III, 57-injection pipe I, 58-injection pipe II. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0036] A device for preparing fancy composite network yarn, such as Figure 2~Figure 4 As shown, it includes a housing 53 and a first network nozzle and a second network nozzle located in the housing 53;

[0037] The first network nozzle includes a wire path Ⅰ 54, an air chamber Ⅰ 51 and an injection pipe Ⅰ 57, and the second network nozzle includes a wire path Ⅲ 56, an air chamber Ⅱ 52 and an injection pipe Ⅱ 58, and a wire path Ⅱ 55 is provided in the housing 53;

[0038] Silk channel I 54, silk channel II 55, and silk channel III 56 are interconnected and arranged in sequence from left to right;

[0039] Both wire channel I 54 and wire channel III 56 are prisms formed by moving a "D"-shaped bottom surface parallel to the front-back direction in the left-right direction, and the "D" is composed of a line segment and an arc line, and the line segment is located above the arc line and parallel to the front-back direction; wire channel II 55 is a cylinder formed by moving a circular bottom surface parallel to the front-back direction in the left-right direction; the length of wire channel I 54 is 10~15mm, and the equivalent circle diameter is 2.5~3mm; the length of wire channel II 55 is 20~30mm, and the diameter is 1~1.5mm; the length of wire channel III 56 is 35~50mm, and the equivalent circle diameter is 2~3mm;

[0040] Both the injection tube Ⅰ 57 and the injection tube Ⅱ 58 are circular tubes, the inner diameter of the injection tube Ⅰ 57 is 1~1.2mm, and the inner diameter of the injection tube Ⅱ 58 is 1.5~1.6mm; the injection tube Ⅰ 57 is connected with the air chamber Ⅰ 51 and the wire path Ⅰ 54 at the same time, and the outlet of the injection tube Ⅰ 57 is located on one side of the central axis of the wire path Ⅰ 54; the injection tube Ⅱ 58 is connected with the air chamber Ⅱ 52 and the wire path Ⅲ 56 at the same time, and the central axis of the injection tube Ⅱ 58 is perpendicular to and intersects with the central axis of the wire path Ⅲ 56; the vertical distance between the center of the outlet of the injection tube Ⅰ 57 and the central axis of the wire path Ⅰ 54 is 0.05~0.15mm; the vertical distance between the center of the outlet of the injection tube Ⅱ 58 and the central axis of the wire path Ⅲ 56 is 0mm.

[0041] The following are the test methods for the relevant performance indicators in each embodiment:

[0042] Network fastness: tested in accordance with FZ / T 50001-91 standard.

[0043] Example 1

[0044] A method for preparing a fancy composite network yarn, using the above-mentioned device, the specific steps are as follows:

[0045] (1) Preparation of raw materials;

[0046] Filament multifilament I and Filament multifilament II: both are fine denier DTY multifilaments, with specifications of 3tex / 10F;

[0047] (2) During the parallel continuous movement of the filament multifilament I and the filament multifilament II, the two are controlled to pass through the first network nozzle and the second network nozzle in turn, so as to obtain a fancy composite network yarn;

[0048] Among them, the size parameters of the device are: the length of wire path I is 10mm, and the equivalent circle diameter is 2.5mm; the length of wire path II is 20mm, and the diameter is 1mm; the length of wire path III is 35mm, and the equivalent circle diameter is 2mm; the inner diameter of injection tube I is 1mm, and the inner diameter of injection tube II is 1.5mm; the vertical distance between the center of the outlet of injection tube I and the central axis of wire path I is 0.05mm;

[0049] Related process parameters: The pressure of the airflow ejected by the first network nozzle is 1kg / cm 2 The pressure of the airflow ejected by the second network nozzle is 1.5kg / cm 2 .

[0050] like Figure 1 As shown, the finally obtained fancy composite network yarn is composed of a number of continuous irregularly arranged parallel parts Ⅰ 1, mixed parts Ⅰ 2, parallel parts Ⅱ 3 and mixed parts Ⅱ 4 in the longitudinal length; the parallel part Ⅰ 1 is composed of loose filament multifilaments Ⅰ and loose filament multifilaments Ⅱ; the parallel part Ⅱ 3 is composed of loose filament multifilaments Ⅱ and mutually entangled filament multifilaments Ⅰ; the mixed part Ⅰ 2 is formed by uniformly mixing and entangled filament multifilaments Ⅰ and filament multifilaments Ⅱ; the mixed part Ⅱ 4 is formed by unevenly mixing and entangled filament multifilaments Ⅰ and filament multifilaments Ⅱ; the length of the parallel part Ⅰ 1 is 3.5~3.8mm, the length of the parallel part Ⅱ 3 is 3.5~3.8mm, the network fastness of the filament multifilament Ⅰ in the parallel part Ⅱ 3 is 50~53%, the length of the mixed part Ⅰ 2 is 3.5~3.8mm, the network fastness of the mixed part Ⅰ 2 is 65~68%, and the network fastness of the mixed part Ⅱ The length of 4 is 3.5~3.8mm, and the network fastness of the mixed part II 4 is 50~68%.

[0051] Example 2

[0052] A method for preparing a fancy composite network yarn, using the above-mentioned device, the specific steps are as follows:

[0053] (1) Preparation of raw materials;

[0054] Filament multifilament I and Filament multifilament II: both are fine denier DTY multifilaments, with specifications of 5tex / 14F;

[0055] (2) During the parallel continuous movement of the filament multifilament I and the filament multifilament II, the two are controlled to pass through the first network nozzle and the second network nozzle in turn, so as to obtain a fancy composite network yarn;

[0056] Among them, the size parameters of the device are: the length of wire path I is 12mm, and the equivalent circle diameter is 2.5mm; the length of wire path II is 22mm, and the diameter is 1.2mm; the length of wire path III is 40mm, and the equivalent circle diameter is 2.4mm; the inner diameter of injection tube I is 1mm, and the inner diameter of injection tube II is 1.5mm; the vertical distance between the center of the outlet of injection tube I and the central axis of wire path I is 0.08mm;

[0057] Related process parameters: The pressure of the airflow ejected by the first network nozzle is 1kg / cm 2 The pressure of the airflow ejected by the second network nozzle is 1.6kg / cm 2 .

[0058] The final fancy composite network yarn is composed of a number of continuous irregularly arranged parallel parts I, mixed parts I, parallel parts II and mixed parts II in the longitudinal length; the parallel part I is composed of loose filament multifilaments I and loose filament multifilaments II; the parallel part II is composed of loose filament multifilaments II and mutually entangled filament multifilaments I; the mixed part I is formed by uniform mixing and entanglement of filament multifilaments I and filament multifilaments II; the mixed part II is formed by uneven mixing and entanglement of filament multifilaments I and filament multifilaments II; the length of the parallel part I is 3.6~4mm, the length of the parallel part II is 3.6~4mm, the network fastness of the filament multifilament I in the parallel part II is 53~58%, the length of the mixed part I is 3.6~4mm, the network fastness of the mixed part I is 66~70%, the length of the mixed part II is 3.6~4mm, and the network fastness of the mixed part II is 60~70%.

[0059] Example 3

[0060] A method for preparing a fancy composite network yarn, using the above-mentioned device, the specific steps are as follows:

[0061] (1) Preparation of raw materials;

[0062] Filament multifilament I and Filament multifilament II: both are fine denier DTY multifilaments, with specifications of 6tex / 16F;

[0063] (2) During the parallel continuous movement of the filament multifilament I and the filament multifilament II, the two are controlled to pass through the first network nozzle and the second network nozzle in turn, so as to obtain a fancy composite network yarn;

[0064] Among them, the size parameters of the device are: the length of wire path I is 13mm, and the equivalent circle diameter is 2.6mm; the length of wire path II is 26mm, and the diameter is 1.3mm; the length of wire path III is 40mm, and the equivalent circle diameter is 2.6mm; the inner diameter of injection tube I is 1.1mm, and the inner diameter of injection tube II is 1.6mm; the vertical distance between the center of the outlet of injection tube I and the central axis of wire path I is 0.1mm;

[0065] Relevant process parameters: The pressure of the airflow ejected by the first network nozzle is 1.1kg / cm 2 The pressure of the airflow ejected by the second network nozzle is 1.7kg / cm 2 .

[0066] The final fancy composite network yarn is composed of a number of continuous irregularly arranged parallel parts I, mixed parts I, parallel parts II and mixed parts II in the longitudinal length; the parallel part I is composed of loose filament multifilaments I and loose filament multifilaments II; the parallel part II is composed of loose filament multifilaments II and mutually entangled filament multifilaments I; the mixed part I is formed by uniform mixing and entanglement of filament multifilaments I and filament multifilaments II; the mixed part II is formed by uneven mixing and entanglement of filament multifilaments I and filament multifilaments II; the length of the parallel part I is 3.8~4mm, the length of the parallel part II is 3.8~4mm, the network fastness of the filament multifilament I in the parallel part II is 58~60%, the length of the mixed part I is 3.8~4mm, the network fastness of the mixed part I is 66~70%, the length of the mixed part II is 3.8~4mm, and the network fastness of the mixed part II is 58~70%.

[0067] Example 4

[0068] A method for preparing a fancy composite network yarn, using the above-mentioned device, the specific steps are as follows:

[0069] (1) Preparation of raw materials;

[0070] Filament multifilament I and Filament multifilament II: both are fine denier DTY multifilaments, with specifications of 8tex / 20F;

[0071] (2) During the parallel continuous movement of the filament multifilament I and the filament multifilament II, the two are controlled to pass through the first network nozzle and the second network nozzle in turn, so as to obtain a fancy composite network yarn;

[0072] Among them, the size parameters of the device are: the length of wire path I is 14mm, and the equivalent circle diameter is 2.8mm; the length of wire path II is 28mm, and the diameter is 1.4mm; the length of wire path III is 45mm, and the equivalent circle diameter is 2.8mm; the inner diameter of injection tube I is 1.2mm, and the inner diameter of injection tube II is 1.6mm; the vertical distance between the center of the outlet of injection tube I and the central axis of wire path I is 0.12mm;

[0073] Relevant process parameters: The pressure of the airflow ejected by the first network nozzle is 1.2kg / cm 2 The pressure of the airflow ejected by the second network nozzle is 1.8kg / cm 2 .

[0074] The final fancy composite network yarn is composed of a number of continuous irregularly arranged parallel parts I, mixed parts I, parallel parts II and mixed parts II in the longitudinal length; the parallel part I is composed of loose filament multifilaments I and loose filament multifilaments II; the parallel part II is composed of loose filament multifilaments II and mutually entangled filament multifilaments I; the mixed part I is formed by uniform mixing and entanglement of filament multifilaments I and filament multifilaments II; the mixed part II is formed by uneven mixing and entanglement of filament multifilaments I and filament multifilaments II; the length of the parallel part I is 3.7~4mm, the length of the parallel part II is 3.7~4mm, the network fastness of the filament multifilament I in the parallel part II is 55~60%, the length of the mixed part I is 3.7~4mm, the network fastness of the mixed part I is 68~70%, the length of the mixed part II is 3.7~4mm, and the network fastness of the mixed part II is 55~70%.

[0075] Example 5

[0076] A method for preparing a fancy composite network yarn, using the above-mentioned device, the specific steps are as follows:

[0077] (1) Preparation of raw materials;

[0078] Filament multifilament I and Filament multifilament II: both are fine denier DTY multifilaments, with specifications of 8tex / 20F;

[0079] (2) During the parallel continuous movement of the filament multifilament I and the filament multifilament II, the two are controlled to pass through the first network nozzle and the second network nozzle in turn, so as to obtain a fancy composite network yarn;

[0080] Among them, the size parameters of the device are: the length of wire path I is 15mm, and the equivalent circle diameter is 3mm; the length of wire path II is 30mm, and the diameter is 1.5mm; the length of wire path III is 50mm, and the equivalent circle diameter is 3mm; the inner diameter of injection tube I is 1.2mm, and the inner diameter of injection tube II is 1.6mm; the vertical distance between the center of the outlet of injection tube I and the central axis of wire path I is 0.15mm;

[0081] Relevant process parameters: The pressure of the airflow ejected by the first network nozzle is 1.2kg / cm 2 The pressure of the airflow ejected by the second network nozzle is 2kg / cm 2 .

[0082] The final fancy composite network yarn is composed of a number of continuous irregularly arranged parallel parts I, mixed parts I, parallel parts II and mixed parts II in the longitudinal length; the parallel part I is composed of loose filament multifilaments I and loose filament multifilaments II; the parallel part II is composed of loose filament multifilaments II and mutually entangled filament multifilaments I; the mixed part I is formed by uniform mixing and entanglement of filament multifilaments I and filament multifilaments II; the mixed part II is formed by uneven mixing and entanglement of filament multifilaments I and filament multifilaments II; the length of the parallel part I is 3.8~4mm, the length of the parallel part II is 3.8~4mm, the network fastness of the filament multifilament I in the parallel part II is 55~58%, the length of the mixed part I is 3.8~4mm, the network fastness of the mixed part I is 66~70%, the length of the mixed part II is 3.8~4mm, and the network fastness of the mixed part II is 55~70%.

Claims

1. A fancy composite network yarn, which is formed by the network composite of filament multifilament I and filament multifilament II, characterized in that: The fancy composite network yarn is composed of a number of consecutive irregularly arranged parallel parts I, mixed parts I, parallel parts II and mixed parts II in the longitudinal length; The parallel part I is composed of loose filament multifilament I and loose filament multifilament II; the parallel part II is composed of loose filament multifilament II and mutually entangled filament multifilament I; the mixed part I is formed by uniformly mixing and entangled filament multifilament I and filament multifilament II; the mixed part II is formed by unevenly mixing and entangled filament multifilament I and filament multifilament II; The preparation method is: During the parallel continuous movement of filament multifilaments I and filament multifilaments II, the two are controlled to pass through two network nozzles that continuously spray airflow in sequence, the two network nozzles are arranged at intervals, the first network nozzle is located at the rear side of the moving direction, the airflow of the first network nozzle only acts on the filament multifilaments I, after leaving the first network nozzle, the filament multifilaments I are composed of loose fiber opening parts and entangled intertwining parts, after leaving the first network nozzle, the filament multifilaments II are still in a loose state, the second network nozzle is located at the front side of the moving direction, the airflow of the second network nozzle acts on the filament multifilaments I and the filament multifilaments II at the same time, the first network nozzle includes a wire path I, the second network nozzle includes a wire path III, the length of the wire path I is 10-15 mm, and the length of the wire path III is 35-50 mm; The pressure of the airflow ejected from the first network nozzle is lower than the pressure of the airflow ejected from the second network nozzle; The first network nozzle also includes an air chamber I and a jet tube I, which is connected to both the air chamber I and the silk path I, and the outlet of the jet tube I is located on one side of the central axis of the silk path I; the second network nozzle also includes an air chamber II and a jet tube II, which is connected to both the air chamber II and the silk path III, and the central axis of the jet tube II is perpendicular to and intersects with the central axis of the silk path III.

2. The fancy composite network yarn according to claim 1, characterized in that: Both filament multifilament I and filament multifilament II are fine denier DTY multifilaments with the same specification parameters, both of which are 3~8tex / 10~20F.

3. The fancy composite network yarn according to claim 1, characterized in that: The length of the parallel part I is 3.5~4mm, the length of the parallel part II is 3.5~4mm, the network fastness of the filament multifilament I in the parallel part II is 50~60%, the length of the mixed part I is 3.5~4mm, the network fastness of the mixed part I is 65~70%, the length of the mixed part II is 3.5~4mm, and the network fastness of the mixed part II is 50~70%.

4. The fancy composite network yarn according to claim 1, characterized in that: The pressure of the airflow ejected by the first network nozzle is 1~1.2kg / cm 2 The pressure of the airflow ejected by the second network nozzle is 1.5~2kg / cm 2 .

5. The fancy composite network yarn according to claim 1, characterized in that: The first network nozzle and the second network nozzle are located in the shell at the same time; a wire path II is arranged in the shell, and wire paths I, II and III are interconnected and arranged in sequence from left to right.

6. The fancy composite network yarn according to claim 5, characterized in that: Both Silk Path I and Silk Path III are prisms formed by moving a "D"-shaped bottom surface parallel to the front-to-back direction along the left-to-right direction. The "D" is composed of a line segment and an arc. The line segment is located above the arc and parallel to the front-to-back direction.

7. The fancy composite network yarn according to claim 5, characterized in that: Both the jet tube I and the jet tube II are round tubes, the inner diameter of the jet tube I is 1-1.2 mm, and the inner diameter of the jet tube II is 1.5-1.6 mm; The vertical distance between the center of the outlet of the jet tube I and the central axis of the wire path I is 0.05-0.15 mm; the vertical distance between the center of the outlet of the jet tube II and the central axis of the wire path III is 0 mm; Silk channel II is a cylinder formed by moving a circular bottom surface parallel to the front-rear direction in the left-right direction; The equivalent circle diameter of wire path I is 2.5~3mm; the length of wire path II is 20~30mm and the diameter is 1~1.5mm; the equivalent circle diameter of wire path III is 2~3mm.

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