Fabric with adjustable fabric tightness, preparation method thereof and clothing

Abstract

The invention discloses a fabric with adjustable fabric tightness and a preparation method and clothing thereof.The fabric comprises warp and weft, the warp is obtained by twisting functional chinlon filaments in the first twisting direction, the weft is obtained by twisting functional chinlon filaments in the second twisting direction, the first twisting direction is opposite to the second twisting direction, the functional chinlon filaments are spiral, and the functional chinlon filaments are spiral. The interweaving parts of the warp yarns and the weft yarns are mutually nested; the warp yarns and the weft yarns have a first state and a second state, when the temperature is higher than or equal to 30 DEG C, the warp yarns and the weft yarns are in the first state, and the fabric tightness of the fabric is 45%-70%; when the temperature is lower than or equal to 15 DEG C, the warp yarns and the weft yarns are in a second state, and the fabric tightness of the fabric is 80%-95%. According to the preparation method of the fabric, the fabric of which the fabric tightness is regulated and controlled along with the temperature change can be prepared.

Description

Technical Field

[0001] The invention belongs to the technical field of textiles, and in particular relates to a fabric with adjustable tightness, a preparation method thereof, and clothing. Background Art

[0002] For areas with large temperature differences, or when going from an air-conditioned room to the outdoors, people often adjust their sensation of cold or heat by adding clothes. Most clothes on the market have only a single function and cannot meet the needs of high-temperature breathability and low-temperature warmth at the same time. This also means that we have to carry extra clothes with us, which brings inconvenience to our travel.

[0003] In the prior art, garments that combine these two functions often undergo complex finishing. For example, Chinese utility model patent publication number CN219342488U, entitled "Intelligent Temperature-Regulating 3D Warp-Knitted Spacer Fabric," discloses the use of intelligent temperature-regulating 3D warp-knitted spacer fabric. By combining temperature-sensitive smart yarns with conventional yarns in the fabric structure, the thermal resistance and bulk of the fabric are controlled by the temperature-sensitive changes of the yarns, forming a different layered structure to regulate human body temperature. However, the temperature control is not flexible enough. Another example is Chinese invention patent publication number CN108866726B, entitled "A Method for Preparing Heat-Expandable Yarn," which discloses mixing expandable graphite with a high-temperature resistant adhesive, vacuum degassing and stirring the resulting mixture, and evenly spraying it onto the surface of a high-temperature resistant fiber. After curing, the mixture is produced using spinning technology to produce heat-expandable yarn. The yarn expands by utilizing the graphite's expansion properties at high temperatures. However, this method is only suitable for use in aviation, aerospace, energy, and other fields and cannot meet clothing needs. Another example is the Chinese invention patent, publication number CN115125739B, titled "Intelligent Pipe Insulation Fabric and Preparation Method Thereof." It discloses a fabric that achieves thermal expansion and contraction properties by coating it with a heat-expandable and cold-contractable PU adhesive. This allows for breathability while improving stiffness and adaptability. However, the production process is complex. The resulting functional fabrics, which require complex post-processing, are both expensive to produce and sell for, and therefore fail to meet widespread consumer demand. Summary of the Invention

[0004] In view of this, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a fabric with adjustable fabric tightness, a preparation method thereof, and clothing.

[0005] One object of the present invention is to provide a fabric with adjustable fabric tightness, comprising warp yarns and weft yarns, wherein the warp yarns are obtained by twisting functional nylon filaments in a first twist direction, and the weft yarns are obtained by twisting functional nylon filaments in a second twist direction, the first twist direction is opposite to the second twist direction, the functional nylon filaments are spiral in shape, and the interweaving of the warp yarns and the weft yarns is nested with each other; the warp yarns and the weft yarns both have a first state and a second state, when the temperature is greater than or equal to 30°C, the warp yarns and the weft yarns are both in the first state, and the fabric tightness of the fabric is 45%-70%; when the temperature is less than or equal to 15°C, the warp yarns and the weft yarns are both in the second state, and the fabric tightness of the fabric is 80%-95%.

[0006] By designing functional nylon filaments and twisting them in the first twist direction and the second twist direction respectively, warp yarns and weft yarns with spiral structures in opposite directions can be obtained. By using such warp yarns and weft yarns for warp and weft interweaving, a fabric with adjustable fabric tightness can be obtained. Since the warp yarns and weft yarns themselves have spiral structures with opposite directions, such a structure is three-dimensional, so that in the interwoven fabric, the warp yarns and weft yarns are nested with each other at the intersection of the warp yarns and the weft yarns, which is beneficial to enhancing the stability of the fabric, thereby increasing the windproof performance of the fabric; and, without increasing the yarn weight, the existence of the three-dimensional gaps between the warp yarns and the weft yarns can also increase the thickness of the fabric to a certain extent. In addition, due to the introduction of temperature-sensitive materials into nylon filaments, when the temperature is greater than or equal to 30°C, the warp and weft yarns will stretch and become thinner, making the fabric tightness of the fabric smaller, enhancing the breathability of the fabric and preventing stuffiness; when the temperature is less than or equal to 15°C, the warp and weft yarns will shrink and become thicker, increasing the fabric tightness of the fabric. At the same time, the cavity of the spiral warp and weft yarns becomes larger, which is conducive to increasing the amount of static air, thereby improving the warmth retention effect of the fabric.

[0007] According to some preferred embodiments of the present invention, the lengths of the warp and weft yarns when both are in the first state are greater than the lengths of the warp and weft yarns when both are in the second state. In the first state, the functional nylon filaments stretch and become thinner when heated, thereby increasing the lengths of the warp and weft yarns. In the second state, the functional nylon filaments shrink and become thicker when cooled, thereby decreasing the lengths of the warp and weft yarns.

[0008] According to some preferred embodiments of the present invention, the spiral functional nylon filaments are obtained by spinning a functional nylon melt through a spinneret, and the spinneret is provided with through holes extending through the thickness direction thereof.

[0009] According to some preferred embodiments of the present invention, the functional nylon melt is obtained by uniformly mixing nylon chips with a temperature-sensitive masterbatch and then melting them. The addition of the temperature-sensitive masterbatch enables the functional nylon filaments to change their morphology in response to changes in ambient temperature, thereby intelligently regulating the gaps between the warp and weft yarns in the fabric to adjust the fabric's tightness.

[0010] According to some preferred embodiments of the present invention, the area of ​​the through holes accounts for 20%-40% of the area of ​​the spinneret.

[0011] According to some preferred embodiments of the present invention, the through hole has a first side and a second side, one end of the first side is connected to one end of the second side, the other end of the first side is connected to the other end of the second side, and both the first side and the second side are arc-shaped.

[0012] According to some preferred embodiments of the present invention, the spinneret has a third side, the first side and the second side are both recessed inwardly toward the third side, and the second side is located between the first side and the third side.

[0013] According to some preferred embodiments of the present invention, the midpoint of the first side and the midpoint of the second side are located on the same straight line parallel to the length or width direction of the spinneret, and the curvature of the first side is greater than that of the second side.

[0014] Preferably, in some embodiments of the present invention, the structural design of the through hole as described above can ensure that the shape of the functional nylon filament obtained after being ejected from the spinneret is a spiral shape with a good three-dimensional sense, and the functional nylon filament of such a shape can further ensure that the warp yarn and weft yarn obtained after subsequent monofilament twisting have a stable spiral structure.

[0015] According to some preferred embodiments of the present invention, the surface density of the fabric is 60-100 g / m 2

[0016] According to some preferred embodiments of the present invention, the fineness of the functional nylon filament is 50-100D.

[0017] Another object of the present invention is to provide a method for preparing the fabric with adjustable fabric tightness as described above, comprising the following steps:

[0018] The nylon chips and the temperature-sensitive masterbatch are uniformly mixed and melted to obtain a functional nylon melt, and the functional nylon melt is then extruded, spun by a spinneret, cooled by a side wind, and stretched to obtain a spiral functional nylon filament;

[0019] Twisting a portion of the functional nylon filaments monofilamentally in a first twist direction to obtain warp yarns, and twisting another portion of the functional nylon filaments monofilamentally in a second twist direction to obtain weft yarns, wherein the first twist direction is opposite to the second twist direction;

[0020] The warp yarn and the weft yarn are shaped at high temperature and then interwoven through warp and weft to obtain the fabric.

[0021] The preparation method of the fabric with adjustable fabric tightness of the present invention does not require complicated post-finishing steps, but achieves the effect that the tightness of the fabric can be adjusted with temperature changes by improving the structure of the yarn itself. The preparation method is simple and can effectively reduce production costs.

[0022] According to some preferred embodiments of the present invention, the mass ratio of the nylon chips to the temperature-sensitive masterbatch is 2:1-5:2. In some embodiments of the present invention, the temperature-sensitive masterbatch is a functional polymer masterbatch with temperature-sensitive groups grafted, blended, or copolymerized on the surface, such as polyetheretherketone (PEEK) grafted with poly-N-isopropylacrylamide, polyethersulfone (PES) / polysulfone (PSU) block temperature-sensitive copolymers, etc., so that the functional nylon melt can achieve temperature-sensitive properties.

[0023] According to some preferred embodiments of the present invention, the twist of the functional nylon filament during monofilament twisting is 100-150 twists / 10cm.

[0024] According to some preferred embodiments of the present invention, the warp and weft interweaving is woven using a rapier loom in a satin, twill, or plain weave structure, with a monofilament tension of 0.10-0.20 g / D during weaving. Due to the special structure of the warp and weft yarns in the present invention, using an air jet loom or a water jet loom for weft insertion can cause kinking. However, using a double rapier loom that can stably hold the weft yarn can avoid this problem. On the drawing-in machine, the warp yarns are sequentially inserted into the heald eyelets of different healds of 10 heald frames to ensure that each warp monofilament does not entangle with each other, and the weft yarns are introduced into the shed one at a time. In addition, the weft insertion parameters are: the time for entering the weft sword is 70°-75°, the time for joining the weft sword is 180°, and the time for exiting is 295°-320°.

[0025] In addition, the monofilament tension during the weaving process is set to 0.10-0.20g / D. This is because the warp and weft yarns are stretched by such tension, which can make the grooves of the warp and weft yarns more obvious, making it easier for the warp and weft yarns to nest with each other, thereby increasing the stability of the fabric.

[0026] According to some preferred embodiments of the present invention, the temperature for high-temperature setting of the warp and weft yarns is 100-120° C. The purpose of high-temperature setting of the warp and weft yarns is to ensure that the spiral structure of the warp and weft yarns is stable.

[0027] According to some preferred embodiments of the present invention, the first twist direction is an S twist direction or a Z twist direction. Specifically, when the first twist direction is an S twist direction, the second twist direction is a Z twist direction; when the first twist direction is a Z twist direction, the second twist direction is an S twist direction, thereby ensuring that the warp and weft yarns used for interweaving are always obtained by twisting monofilaments with opposite twist directions.

[0028] Another object of the present invention is to provide a clothing product made using the fabric with adjustable fabric tightness as described above. The clothing made using the fabric with adjustable fabric tightness of the present invention, due to the design and improvement of the yarn structure of the fabric itself, can adjust the fabric tightness of the clothing fabric in time according to temperature changes when such clothing is switched between high and low temperature environments, so that people wearing the clothing can have a warming effect in a low temperature environment and have good breathability in a high temperature environment without feeling stuffy.

[0029] Due to the adoption of the above technical solutions, compared with the prior art, the benefits of the present invention are as follows: the fabric with adjustable fabric tightness and the preparation method thereof, through the design of functional nylon filaments, are twisted in a first twist direction and a second twist direction respectively to obtain warp yarns and weft yarns with spiral structures in opposite directions. After warp and weft interweaving such warp yarns and weft yarns, a fabric whose fabric tightness is regulated with temperature changes can be obtained, and the stability of the fabric is improved; the preparation method of the present invention does not require complicated post-finishing steps, the preparation method is simple, and can effectively reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0031] Figure 1 Schematic diagram of the main structure of the functional nylon filament of the present invention;

[0032] Figure 2 Schematic diagram of the main structure of the spinneret in the present invention;

[0033] Figure 3 Schematic diagram of the main structure of the warp yarn in the present invention;

[0034] Figure 4 Schematic diagram of the main structure of the weft yarn in the present invention;

[0035] Figure 5 This is a schematic diagram of the main structure of the fabric in the first state of the present invention;

[0036] Figure 6 This is a schematic diagram of the main structure of the fabric in the second state of the present invention;

[0037] Wherein, the accompanying drawings are marked as follows:

[0038] Spinneret-1, through hole-11, first side-111, second side-112, third side-12. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0040] The present invention provides a fabric with adjustable fabric tightness, the surface density of the fabric is 60-100g / m 2 The fabric includes warp yarn and weft yarn. The warp yarn is obtained by twisting spiral functional nylon filaments in a first twist direction, and the weft yarn is obtained by twisting spiral functional nylon filaments in a second twist direction. The first twist direction is opposite to the second twist direction, and the warp yarn and the weft yarn are nested in each other at the interweaving parts.

[0041] Furthermore, the fineness of the functional nylon filament is 50-100D. The spiral functional nylon filament of the present invention is obtained by spinning the functional nylon melt through a spinneret 1, wherein the functional nylon melt is obtained by evenly mixing nylon chips and temperature-sensitive masterbatch and then melting them. The addition of the temperature-sensitive masterbatch enables the functional nylon filament obtained after spinning to change its shape (elongation and contraction) according to changes in ambient temperature, thereby being able to intelligently control the gap between the warp yarn and the weft yarn in the fabric to control the fabric tightness of the fabric.

[0042] Furthermore, if Figure 2 As shown, the spinneret 1 is provided with a through hole 11 running through the thickness direction thereof, and the area of ​​the through hole 11 accounts for 20%-40% of the area of ​​the spinneret 1, wherein the through hole 11 has a first side 111 and a second side 112, and the spinneret 1 has a third side 12; one end of the first side 111 is connected to one end of the second side 112, and the other end of the first side 111 is connected to the other end of the second side 112, and the second side 112 is located between the first side 111 and the third side 12.

[0043] The first side 111 and the second side 112 are both arc-shaped, and both are recessed inwardly toward the third side 12. The midpoints of the first side 111 and the second side 112 lie on the same straight line parallel to the length or width of the spinneret 1, and the curvature of the first side 111 is greater than that of the second side 112. This structural design ensures that the functional nylon filaments obtained after being ejected from the spinneret 1 have a spiral shape with a good three-dimensional effect, further ensuring that the warp and weft yarns obtained after subsequent monofilament twisting have a stable spiral structure. Combined with the design of the functional nylon filaments containing temperature-sensitive materials, the fabric can change its tightness as the warp and weft yarns change shape when switching between low and high temperature environments.

[0044] Specifically, the warp yarn and the weft yarn of the present invention both have a first state and a second state. When the temperature is greater than or equal to 30°C, Figure 5 As shown, the warp and weft yarns are in the first state, that is, the elongated state, the fabric tightness is 45%-70%, and the air permeability is good; when the temperature is less than or equal to 15 ° C, as shown in FIG. Figure 6 As shown, both the warp yarns and the weft yarns are in the second state, i.e., the contracted state, and the fabric tightness of the fabric is 80%-95%, with good warmth retention.

[0045] The present invention also provides a method for preparing a fabric with adjustable fabric tightness, comprising the following steps:

[0046] Step 1: Preparation of functional nylon melt

[0047] According to the mass ratio of nylon chips to temperature-sensitive masterbatch of 2:1-5:2, weigh an appropriate amount of nylon chips and temperature-sensitive masterbatch, mix them evenly, add them into the reactor, heat them to 250-260°C while stirring, and melt them to obtain functional nylon melt.

[0048] Among them, the thermosensitive masterbatch is a functional polymer masterbatch with thermosensitive groups grafted, blended or copolymerized on the surface, such as polyetheretherketone (PEEK) grafted with poly-N-isopropylacrylamide, polyethersulfone (PES) / polysulfone (PSU) block thermosensitive copolymer, etc.

[0049] Step 2: Preparation of functional nylon filament

[0050] First, the spinneret 1 is designed and processed according to the spiral shape of the functional nylon filament. Then, the functional nylon melt in step 1 is accurately measured by a metering pump and transferred to a screw extruder with a pre-designed spinneret 1 under heat preservation conditions. After extrusion, it is ejected through the spinneret 1 to form a filament bundle. After crosswind cooling and stretching, a spiral functional nylon filament with a fineness of 50-100D is obtained. Its structure is as follows Figure 1 shown.

[0051] Step 3: Weaving

[0052] A portion of the functional nylon filaments obtained in step 2 are twisted in a first twist direction to obtain the following: Figure 3 The warp yarn shown in FIG, and then the functional nylon filament obtained in step 2 is twisted in the second twist direction to obtain the warp yarn shown in FIG. Figure 4 The twist of the weft yarn shown is 100-150 twists / 10 cm, and the first twist direction is opposite to the second twist direction. The warp and weft yarns are then shaped at a temperature of 100-120°C, interwoven with each other using a rapier loom, and then heat-set after being removed from the loom to obtain the fabric with adjustable fabric tightness of the present invention.

[0053] On the drawing-in machine, the warp yarns are sequentially threaded into the heald eyes of the different healds of the 10 heald frames. The weft yarns are introduced into the shed one at a time. The monofilament tension during weaving is 0.10-0.20 g / D. The weft insertion parameters are: weft insertion time at 70-75°, weft connection time at 180°, and weft withdrawal time at 295-320°. The resulting fabric has a satin, twill, or plain weave structure.

[0054] Furthermore, the first twist direction is an S twist direction, and the second twist direction is a Z twist direction, or the first twist direction is a Z twist direction, and the second twist direction is an S twist direction.

[0055] Example 1

[0056] This embodiment provides a method for preparing a fabric with adjustable fabric tightness and the fabric prepared therefrom. The method for preparing the fabric specifically comprises the following steps:

[0057] Step 1: Preparation of functional nylon melt

[0058] According to the mass ratio of nylon chips to temperature-sensitive masterbatch of 2:1, appropriate amounts of nylon chips and temperature-sensitive masterbatch were weighed, mixed evenly, and added into the reactor. The mixture was heated to 250°C while stirring, and the functional nylon melt was obtained by melting.

[0059] Step 2: Preparation of functional nylon filament

[0060] First, design and process the spinneret 1 according to the spiral shape of the functional nylon filament, then accurately measure the functional nylon melt in step 1 with a metering pump, and transfer it to a screw extruder with a pre-designed spinneret 1 under heat preservation conditions. After extrusion, it is sprayed out through the spinneret 1 to form a filament bundle, and then cooled by side wind and stretched to obtain a spiral functional nylon filament with a fineness of 55D.

[0061] Step 3: Weaving

[0062] A portion of the functional nylon filaments obtained in step 2 is mono-twisted in an S-twist direction to obtain a warp yarn, and another portion of the functional nylon filaments obtained in step 2 is mono-twisted in a Z-twist direction to obtain a weft yarn. The twist of the mono-twist is 120 twists / 10 cm. The warp and weft yarns are then shaped at 100°C and interwoven in a satin weave using a rapier loom. After being heat-set after being removed from the loom, the fabric is obtained. On the drawing-in machine, the warp yarns are sequentially threaded into the heald eyes of different healds of 10 heald frames, and the weft yarns are introduced into the shed one at a time. The mono-filament tension during weaving is 0.15 g / D. The weft insertion parameters are: weft lance entry time is 70°-75°, weft lance connection time is 180°, and weft withdrawal time is 295°-320°.

[0063] The surface density of the fabric prepared in this embodiment is 62g / m 2 , it has been measured that when the temperature is greater than or equal to 30℃, the fabric tightness of the fabric is 58% and the air permeability is 140mm / s; when the temperature is less than or equal to 15℃, the fabric tightness of the fabric is 85%.

[0064] Example 2

[0065] This embodiment provides a method for preparing a fabric with adjustable fabric tightness and the fabric prepared therefrom. The method for preparing the fabric specifically comprises the following steps:

[0066] Step 1: Preparation of functional nylon melt

[0067] According to the mass ratio of nylon chips to temperature-sensitive masterbatch of 5:2, appropriate amount of nylon chips and temperature-sensitive masterbatch were weighed, mixed evenly and added into the reactor. The mixture was heated to 260°C while stirring and melted to obtain functional nylon melt.

[0068] Step 2: Preparation of functional nylon filament

[0069] First, design and process the spinneret 1 according to the spiral shape of the functional nylon filament, then accurately measure the functional nylon melt in step 1 with a metering pump, and transfer it to a screw extruder with a pre-designed spinneret 1 under heat preservation conditions. After extrusion, it is sprayed out through the spinneret 1 to form a filament bundle, and then cooled by side wind and stretched to obtain a spiral functional nylon filament with a fineness of 60D.

[0070] Step 3: Weaving

[0071] A portion of the functional nylon filaments obtained in step 2 is twisted in the Z twist direction to obtain a warp yarn, and another portion of the functional nylon filaments obtained in step 2 is twisted in the S twist direction to obtain a weft yarn. The twist of the monofilament twist is 130 twists / 10 cm. The warp yarn and the weft yarn are both shaped at a temperature of 120°C, and then the warp and weft are interwoven according to the plain weave using a rapier loom. After being unloaded from the machine, the fabric is heat-set to obtain the fabric.

[0072] On the drawing-in machine, the warp yarns are sequentially threaded through the heald eyes of the different healds of the 10 heald frames. The weft yarns are introduced into the shed one at a time. The monofilament tension during weaving is 0.18 g / D. The weft insertion parameters are: weft insertion time at 70°-75°, weft connection time at 180°, and weft withdrawal time at 295°-320°. The resulting fabric has a twill or plain weave structure.

[0073] The surface density of the fabric prepared in this embodiment is 75g / m 2 , it has been measured that when the temperature is greater than or equal to 30℃, the fabric tightness of the fabric is 65% and the air permeability is 106mm / s; when the temperature is less than or equal to 15℃, the fabric tightness of the fabric is 91%.

[0074] Comparative Example 1

[0075] It is basically the same as Example 1, with the only difference being that in step 2, the spinneret is not specially designed, that is, the spinneret in this comparative example does not have the through-hole 11 with a special shape design in Example 1, and only a conventional spinneret is used, so that the functional nylon filament obtained after spinning is not spiral-shaped, but of a conventional shape, and its cross-section is circular.

[0076] The fabric prepared in this comparative example was measured to have a fabric tightness of 52% and an air permeability of 140 mm / s when the temperature was greater than or equal to 30°C; and a fabric tightness of 65% when the temperature was less than or equal to 15°C.

[0077] Comparative Example 2

[0078] The method is basically the same as Example 1, with the only difference being that in step 3, the functional nylon filaments are all twisted in an S-twist direction to obtain warp yarns and weft yarns.

[0079] The fabric prepared in this comparative example was measured to have a fabric tightness of 48% and an air permeability of 150 mm / s when the temperature was greater than or equal to 30°C; and a fabric tightness of 66% when the temperature was less than or equal to 15°C.

[0080] Comparative Example 3

[0081] The method is basically the same as Example 1, with the only difference being that in step 3, the functional nylon filaments are all twisted in the Z twist direction to obtain warp yarns and weft yarns.

[0082] The fabric prepared in this comparative example was measured to have a fabric tightness of 48% and an air permeability of 150 mm / s when the temperature was greater than or equal to 30°C; and a fabric tightness of 66% when the temperature was less than or equal to 15°C.

[0083] Comparative Example 4

[0084] The process is basically the same as Example 1, except that no temperature-sensitive masterbatch is added in step 1.

[0085] The fabric prepared in this comparative example has a fabric tightness of 65% as measured and calculated, which does not change with temperature.

[0086] Results and Discussion

[0087] From the test data of Example 1 and Comparative Examples 1 to 4, it can be seen that the fabric tightness of the fabric prepared in Example 1 is adjusted greatly with temperature changes. However, among Comparative Examples 1 to 4, the fabric tightness of the fabric prepared in Comparative Example 4 cannot change with temperature changes due to the lack of the addition of the temperature-sensitive masterbatch.

[0088] In Comparative Example 1, due to the lack of a specially designed spinneret structure, the resulting functional nylon filaments are not spiral-shaped. Even when further woven using warp and weft yarns obtained by twisting monofilaments in opposite directions, the resulting fabric's tightness adjusts only slightly with temperature changes. This is because the functional nylon filaments forming the warp and weft yarns in Comparative Example 1 are conventional fiber shapes, lacking internal cavities and resulting in a poor three-dimensional effect. Even though the yarns expand or contract with temperature changes, the gap between the warp and weft yarns changes only slightly, resulting in a smaller change in tightness.

[0089] The fabrics prepared in Comparative Examples 2 and 3 are both woven using warp yarns and weft yarns obtained by twisting single filaments in the same twist direction. The tightness of the fabrics in the two comparative examples is adjusted very little with temperature changes. This is because the degree of inlay between the warp yarns and weft yarns of the fabrics in Comparative Examples 2 and 3 is low. When the temperature changes, although the yarns will stretch or shrink accordingly, the gaps between the warp yarns and the weft yarns change consistently, resulting in a small change in the tightness of the fabric.

[0090] It can be seen from this that the present invention provides a fabric with adjustable fabric tightness and a preparation method thereof. Through the structural design of functional nylon filaments, the filaments are twisted in a first twist direction and a second twist direction respectively to obtain warp yarns and weft yarns with spiral structures in opposite directions. By using such warp yarns and weft yarns for warp and weft interweaving, a fabric whose fabric tightness can be adjusted with temperature changes can be obtained without the need for complicated post-finishing steps.

[0091] The above embodiments are intended only to illustrate the technical concepts and features of the present invention. Their purpose is to enable those skilled in the art to understand the contents of the present invention and implement them accordingly. They are not intended to limit the scope of protection of the present invention. Any equivalent changes or modifications made in accordance with the spirit of the present invention are intended to be covered by the scope of protection of the present invention.

Claims

1. A fabric with adjustable tightness, characterized in that: The fabric comprises warp yarns and weft yarns, wherein the warp yarns are obtained by twisting functional nylon filaments in a first twist direction, and the weft yarns are obtained by twisting functional nylon filaments in a second twist direction, wherein the first twist direction is opposite to the second twist direction, the functional nylon filaments are spiral in shape, and the interweaving of the warp yarns and the weft yarns is nested with each other; the warp yarns and the weft yarns both have a first state and a second state, and when the temperature is greater than or equal to 30°C, the warp yarns and the weft yarns are both in the first state, and the fabric tightness of the fabric is 45%-70%; when the temperature is less than or equal to 15°C, the warp yarns and the weft yarns are both in the second state, and the fabric tightness of the fabric is 80%-95%.

2. The fabric with adjustable tightness according to claim 1, characterized in that: The lengths of the warp yarns and the weft yarns when both are in the first state are greater than the lengths of the warp yarns and the weft yarns when both are in the second state.

3. The fabric with adjustable tightness according to claim 1, characterized in that: The spiral functional nylon filaments are obtained by spinning the functional nylon melt through a spinneret, and the spinneret is provided with through holes running through the thickness direction of the spinneret.

4. The fabric with adjustable tightness according to claim 3, characterized in that: The functional nylon melt is obtained by uniformly mixing nylon chips and temperature-sensitive masterbatch and then melting them.

5. The fabric with adjustable tightness according to claim 3, characterized in that: The area of ​​the through holes accounts for 20%-40% of the area of ​​the spinneret.

6. The fabric with adjustable tightness according to claim 5, characterized in that: The through hole has a first side and a second side, one end of the first side is connected to one end of the second side, the other end of the first side is connected to the other end of the second side, and both the first side and the second side are arc-shaped.

7. The fabric with adjustable tightness according to claim 6, characterized in that: The spinneret has a third side, the first side and the second side are both recessed inwardly toward the third side, and the second side is located between the first side and the third side.

8. The fabric with adjustable tightness according to claim 7, characterized in that: The midpoint of the first side and the midpoint of the second side are located on the same straight line parallel to the length or width direction of the spinneret, and the curvature of the first side is greater than that of the second side.

9. The fabric with adjustable tightness according to claim 1, characterized in that: The fineness of the functional nylon filament is 50-100D, and the surface density of the fabric is 60-100g / m 2 .

10. A method for preparing a fabric with adjustable tightness according to any one of claims 1 to 9, characterized in that: The steps include: The nylon chips and the temperature-sensitive masterbatch are uniformly mixed and melted to obtain a functional nylon melt, and the functional nylon melt is then extruded, spun by a spinneret, cooled by a side wind, and stretched to obtain a spiral functional nylon filament; Twisting a portion of the functional nylon filaments monofilamentally in a first twist direction to obtain warp yarns, and twisting another portion of the functional nylon filaments monofilamentally in a second twist direction to obtain weft yarns, wherein the first twist direction is opposite to the second twist direction; The warp yarn and the weft yarn are shaped at high temperature and then interwoven through warp and weft to obtain the fabric.

11. The preparation method according to claim 10, characterized in that: The mass ratio of the nylon chips to the temperature-sensitive masterbatch is 2:1-5:

2.

12. The preparation method according to claim 10, characterized in that The twist degree of the functional nylon filaments when twisting the monofilaments is 100-150 twists / 10cm.

13. The preparation method according to claim 10, characterized in that The warp and weft interweaving is carried out by using a rapier loom and in accordance with the weave structure of satin weave, twill weave or plain weave, and the monofilament tension during weaving is 0.10-0.20 g / D.

14. The preparation method according to claim 10, characterized in that The temperature for high-temperature setting of the warp yarn and the weft yarn is 100-120°C.

15. The preparation method according to claim 10, characterized in that The first twist direction is an S twist direction or a Z twist direction.

16. A clothing product made from the fabric with adjustable tightness according to any one of claims 1 to 9.

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