Yarn, textile fabric and preparation method thereof

Abstract

The invention discloses a yarn, a textile fabric and a preparation method of the yarn, the yarn comprises natural fiber / regenerated fiber, conventional polyester staple fiber fiber and low-melting-point composite fiber, the section structure of the low-melting-point composite fiber is of a point-core structure, components of points are distributed on the periphery of components of a core at intervals, and the components of the points are distributed on the periphery of the core at intervals. The core is a conventional melting point polyester / chinlon component, and the point is a low melting point polyester / chinlon component. According to the invention, the low-melting-point composite fiber is mixed in the natural fiber / regenerated fiber and the conventional polyester staple fiber, and the low-melting-point polyester / chinlon component in the low-melting-point composite fiber is easy to melt after being heated, so that the low-melting-point polyester / chinlon component adheres to other fibers, the interface cohesive force between the fibers is increased, and the fibers are not easy to slip; the fuzzing and pilling phenomena of the textile fabric are fundamentally reduced or avoided; meanwhile, due to the section structure of the point-core structure of the low-melting-point composite fiber, consolidation points among the fibers are reduced, and the softness of the fabric is improved.

Description

Technical Field

[0001] The invention belongs to the field of textiles, and in particular relates to a yarn, a textile fabric and a preparation method thereof. Background Art

[0002] During the use of textiles, they are inevitably subjected to repeated friction. The ends of the fibers in many fabrics will be exposed on the surface, forming fuzz. When these fuzz cannot fall off quickly and continue to be subjected to friction, they will form particles and appear pilling, thereby damaging the appearance of the fabric. Therefore, it has attracted much attention from consumers.

[0003] There are many factors that affect the pilling degree of fabrics, including fiber properties, spinning methods, process conditions, yarn blending ratio, raw material matching, weaving type, organizational structure, dyeing and finishing processes, wearing conditions, etc.

[0004] Textile fabrics made by blending conventional polyester staple fibers and natural fibers / regenerated fibers will experience pilling after long-term wearing and friction, which seriously affects the appearance of the fabric. The main reason is that conventional polyester staple fibers and natural fibers / regenerated fibers break and entangle after friction and are not easy to fall off, thus forming pilling.

[0005] There are currently two solutions on the market for anti-pilling of textile fabrics made of polyester fibers:

[0006] 1. By reducing the breaking strength and bonding strength of polyester fibers, the manufactured textile fabrics are easy to fall off after being worn and pilled, but the effect is minimal, and the strength cannot be reduced blindly to affect the spinnability and weaving properties of the fibers;

[0007] 2. Increasing the strength of polyester fiber makes it less likely to break, but increasing the strength will affect the feel and style of the textile fabric, and its application range is relatively narrow.

[0008] In view of this, the present invention is proposed. Summary of the invention

[0009] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a yarn, which is prepared by mixing low-melting-point composite fibers into natural fibers / regenerated fibers and conventional polyester staple fibers, and utilizing the fact that the low-melting-point polyester / nylon component in the low-melting-point composite fibers is easily melted when heated at a certain temperature, thereby adhering to the natural fibers / regenerated fibers and conventional polyester staple fibers, increasing the interface cohesion between the fibers, and effectively preventing the fibers from relative slipping, thereby reducing or avoiding the pilling of the textile fabric; at the same time, due to the point-core structure of the cross-sectional structure of the low-melting-point composite fibers, the consolidation points between the low-melting-point composite fibers and other fibers are reduced on the basis of ensuring the interface cohesion, thereby using less material, having low cost, and having good softness.

[0010] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0011] A yarn comprises natural fiber / regenerated fiber, conventional polyester staple fiber and low-melting-point composite fiber, wherein the cross-sectional structure of the low-melting-point composite fiber is a point-core structure, and the components of the points are distributed at intervals on the periphery of the components of the core.

[0012] In the above scheme, the natural fiber / regenerated fiber includes cellulose fiber / cellulose regenerated fiber / protein fiber such as wool, cotton, viscose, modal, etc.

[0013] Further, the low melting point composite fiber comprises a conventional melting point polyester / nylon component and a low melting point polyester / nylon component, the core is the conventional melting point polyester / nylon component, and the core is the low melting point polyester / nylon component;

[0014] The low melting point polyester / nylon component is embedded into the outer periphery of the conventional melting point polyester / nylon component to form an integrated monofilament;

[0015] Preferably, the area of ​​the low-melting polyester / nylon component embedded in the periphery of the conventional melting point polyester / nylon component accounts for 20% to 80% of the entire cross-sectional area of ​​the low-melting point polyester / nylon component, preferably 40% to 60%;

[0016] Preferably, the number of the points is 1 to 4, more preferably 1 to 2.

[0017] In the above scheme, the distance between the cross-sectional center of the low-melting polyester / nylon component and the cross-sectional center of the conventional melting polyester / nylon component is less than the sum of the radius of the low-melting polyester / nylon component and the radius of the conventional melting polyester / nylon component.

[0018] The preparation of the low melting point composite fiber: the low melting point polyester / nylon component and the conventional melting point polyester / nylon component are melt-extruded by a screw respectively, and then compositely sprayed out by a special component spinneret, cooled, drawn and wound to obtain the composite fiber with a point-core cross-section structure.

[0019] Furthermore, the mass ratio of the low melting point polyester / nylon component to the conventional melting point polyester / nylon component is (10:90) to (50:50), preferably (20:80) to (30:70);

[0020] Preferably, the cross-sectional area of ​​the low melting point polyester / nylon component is smaller than the cross-sectional area of ​​the conventional melting point polyester / nylon component.

[0021] Furthermore, the melting point of the low-melting-point polyester / nylon component is 100°C to 200°C.

[0022] The melting point of the conventional polyester staple fiber is 230°C to 260°C.

[0023] The low-melting point composite fiber can be in the form of low-melting point composite fiber long fibers and / or low-melting point composite fiber short fibers, preferably short fibers, wherein the specification of the low-melting point composite fiber short fibers is (0.8-3.0D)×(38-90mm).

[0024] In the above scheme, the melting point temperature of the low-melting point polyester / nylon component in the low-melting point composite fiber is relatively low, and the melting point temperature of the conventional melting point polyester / nylon component and the conventional polyester staple fiber is relatively high. In the preparation process of textile fabrics, when the temperature of the post-finishing process is higher than the melting point temperature of the low-melting point polyester / nylon component and lower than the melting point temperature of the conventional melting point polyester / nylon component and the conventional polyester staple fiber, the conventional melting point polyester / nylon component and the conventional polyester staple fiber are not affected, but the low-melting point polyester / nylon component will melt and adhere to and consolidate with other fibers, so that the staple fibers will not move relative to each other after adhesion, thereby fundamentally and well solving the problem of pilling of textile fabrics.

[0025] Furthermore, the mass ratio of the natural fiber / regenerated fiber, conventional polyester staple fiber and low-melting-point composite fiber is (10-50): (50-90): (5-30), preferably (10-35): (50-90): (10-15);

[0026] Preferably, the mass percentage of the low-melting-point composite fiber in the textile fabric is 5% to 30%, preferably 5% to 15%.

[0027] A textile fabric is prepared by using the yarn as described above.

[0028] A method for preparing a textile fabric, used for preparing a yarn and a textile fabric as described above, the method comprising:

[0029] (1) mixing natural fiber / regenerated fiber, conventional polyester staple fiber and low melting point composite fiber according to mass percentage;

[0030] (2) preparing yarn from the blended fiber in step (1) by a spinning process;

[0031] (3) preparing the yarn into a grey cloth;

[0032] (4) The grey cloth is prepared into textile fabric through finishing process.

[0033] In the above schemes, the spinning process includes air-spinning, ring spinning, siro spinning, siro compact spinning, vortex spinning, etc.; when the yarn is prepared into grey cloth, it includes preparing knitted grey cloth with knitted fabrics of all knitting structures such as cover weaving, needle-containing or interweaving, or using the yarn as warp yarn and / or weft yarn to prepare woven grey cloth.

[0034] Preferably, the specification of the yarn in step (2) is 10S to 80S.

[0035] Furthermore, in step (1), the mass ratio of the natural fiber / regenerated fiber, conventional polyester staple fiber and low-melting point composite fiber when mixed is (10-50): (50-90): (5-30), preferably (10-35): (50-90): (10-15).

[0036] Preferably, in step (3), the yarn is prepared into a grey cloth alone or together with other functional fibers.

[0037] In the above scheme, other functional fibers include antibacterial fibers, moisture wicking fibers, deodorizing fibers, antistatic fibers, heat storage fibers, etc. The yarn in this application is mixed with other functional fibers to prepare grey cloth, so that the textile fabric prepared in this application can not only solve the problem of pilling, but also have other functions, further enriching the functions of the textile fabric and expanding the scope of application.

[0038] Furthermore, the post-finishing process in step (4) includes pre-setting and post-setting, the pre-setting temperature is higher or lower than the melting point temperature of the low-melting polyester / nylon component in the low-melting composite fiber by 0°C to 50°C, preferably by 10°C to 20°C; the post-setting temperature is higher than the melting point temperature of the low-melting polyester / nylon component in the low-melting composite fiber by 10°C to 30°C, preferably by 10°C to 20°C.

[0039] Preferably, the speed of pre-setting and post-setting is 10 m / min to 30 m / min, preferably 20 m / min to 24 m / min.

[0040] In the above scheme, when the pre-forming temperature is higher than the melting temperature of the low-melting polyester / nylon component, during the pre-forming process, a small amount of low-melting polyester / nylon component in the low-melting composite fiber is melted by heat and adheres and consolidates with other surrounding fibers, which can play a preliminary anti-pilling effect; when the pre-forming temperature is lower than the melting temperature of the low-melting polyester / nylon component, during the pre-forming process, the low-melting polyester / nylon component maintains the original silk state, and then other necessary post-finishing processes such as napping, milling, etc. can be completed, and then the napped short fibers are adhered and consolidated during the post-forming treatment, thus playing an anti-pilling role and improving the thermal insulation performance of the fabric.

[0041] It should be noted that the melting point of the conventional melting point polyester / nylon component is generally above 200° C., which is higher than the pre-setting or post-setting temperature, and will not melt due to heat during the post-finishing process.

[0042] Furthermore, the post-finishing process in step (4) includes dyeing, and during the dyeing process, 6% to 8% alkaline solution is added for alkaline treatment to adjust the pH to 10 to 12.

[0043] In the above scheme, the grey cloth is stirred during the dyeing process; during the alkali treatment process, the low-melting point composite fiber will be peeled off in the length direction under the action of the alkali solution, and the fiber splitting phenomenon will occur. The fineness of the peeled low-melting point polyester / nylon component is 0.2~0.5D, and it will undergo a certain degree of positional displacement under the action of stirring and be evenly dispersed between the fibers.

[0044] Therefore, when the pre-setting temperature is higher than the melting temperature of the low-melting polyester / nylon component, during the pre-setting process, a small amount of low-melting polyester / nylon component in the low-melting composite fiber is melted by heat and adheres to other surrounding fibers. In the post-setting process, most of the low-melting polyester / nylon components are stripped and heated again to form discontinuous point bonding points, which are evenly dispersed between the fibers, so that the textile fabric can not only reduce or avoid pilling, but also increase the gaps between fibers, making the overall texture of the textile fabric softer and more comfortable.

[0045] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0046] 1. The present invention provides a yarn, which is prepared by mixing low-melting-point composite fibers with natural fibers / regenerated fibers and conventional polyester staple fibers, and utilizing that the low-melting-point polyester / nylon component in the low-melting-point composite fibers is easily melted when heated at a certain temperature, thereby adhering to the natural fibers / regenerated fibers and conventional polyester staple fibers, thereby increasing the interfacial cohesion between the fibers and reducing or avoiding the pilling of textile fabrics; at the same time, due to the point-core cross-sectional structure of the low-melting-point composite fibers, the consolidation points between the low-melting-point composite fibers and other fibers are reduced on the basis of ensuring the interfacial cohesion, thereby using less materials, having low cost, and having good softness.

[0047] 2. The present invention also provides a method for preparing a textile fabric. During the alkali treatment process, the low-melting point composite fiber will be peeled off in the length direction under the action of the alkali solution, and the phenomenon of fiber splitting will occur. The fineness of the peeled low-melting point polyester / nylon component is 0.2~0.5D, and it will undergo a certain degree of positional displacement under the action of stirring and will be evenly dispersed among the fibers.

[0048] 3. In the present invention, when the pre-setting temperature is higher than the melting temperature of the low-melting polyester / nylon component, during the pre-setting process, a small amount of low-melting polyester / nylon component in the low-melting composite fiber is melted by heat and adheres to other surrounding fibers. In the post-setting process, since most of the low-melting polyester / nylon components are peeled off and heated again, discontinuous point bonding points are formed, which are evenly dispersed between the fibers, so that the textile fabric can not only reduce or avoid pilling, but also increase the gap between fibers, making the overall texture of the textile fabric softer and more comfortable.

[0049] 4. In the present invention, when the pre-setting temperature is lower than the melting temperature of the low-melting polyester / nylon component, during the pre-setting process, the low-melting polyester / nylon component maintains the original silk state, and then other necessary post-finishing processes such as napping and shrinking can be completed. Then, during the post-setting process, the setting temperature is higher than the melting temperature of the low-melting polyester / nylon component, thereby achieving the purpose of melting the low-melting polyester / nylon component and adhering and consolidating with other fibers, so that the staple fibers will not move relative to each other after adhesion, thereby fundamentally and well solving the problems of pilling, hair loss, etc. of textile fabrics.

[0050] 5. In the present invention, the yarn is mixed with other functional fibers to prepare grey cloth, so that the textile fabric prepared in the present invention can not only solve the problem of pilling, but also have other functions, further enriching the functions of the textile fabric and expanding the scope of application.

[0051] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0053] Figure 1 is a schematic diagram of the cross-sectional structure of the low-melting-point composite fiber in Example 1 of the present invention;

[0054] Figure 2 is a schematic diagram of the cross-sectional structure of the low-melting-point composite fiber in Comparative Example 13 of the present invention;

[0055] Figure 3 is a schematic diagram of the cross-sectional structure of the low-melting-point composite fiber in Comparative Example 14 of the present invention;

[0056] Figure 4It is a schematic diagram of the cross-sectional structure of the low-melting-point composite fiber in Comparative Example 15 of the present invention.

[0057] In the figure, the open circles represent the regular melting point polyester / nylon components, and the twill filled circles represent the low melting point polyester / nylon components.

[0058] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0059] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention is clearly and completely described below in conjunction with some embodiments. It can be understood by those skilled in the art that the following implementation is only used to explain the technical principle of the present invention and is not intended to limit the scope of protection of the present invention. For example, although the present application describes the steps of the method of the present invention in a specific order, these orders are not restrictive. Without departing from the basic principles of the present invention, those skilled in the art can perform the steps in different orders.

[0060] It should be noted that:

[0061] Pilling resistance test method: The modified Martindale method is used to test the pilling resistance of the sample. The parameters can be selected according to the fabric type and the product standard requirements: such as GB / T4802.2-2008 requirements.

[0062] Stiffness test method: Use the inclined plane method to measure and calculate fabric stiffness indicators such as bending stiffness and bending elastic modulus, and then select the fabric that best meets the requirements based on the numerical values, and use this as a benchmark to evaluate the stiffness of other fabrics.

[0063] Example 1

[0064] (1) A low-melting-point composite fiber having a point-core cross-sectional structure with two points and a conventional melting point polyester component as a core and a low-melting-point composite fiber as a point is prepared with a mass ratio of a low-melting-point nylon component to a conventional melting point polyester component of 20:80, wherein the melting point temperature of the low-melting-point composite fiber is 150° C., the area of ​​the low-melting-point composite fiber embedded in the outer periphery of the conventional melting point polyester component accounts for 50% of the entire cross-sectional area of ​​the low-melting-point composite fiber, and the low-melting-point composite fiber is a staple fiber with a specification of 1.5D×38 mm;

[0065] (2) mixing cotton fiber, conventional polyester staple fiber and low melting point composite fiber in a mass ratio of 35:50:15, wherein the melting point temperature of the conventional polyester staple fiber is 250°C;

[0066] (3) preparing 40S yarn from the blended fiber in step (2) by a ring spinning process;

[0067] (4) using the yarn of step (3) as the loops of single-sided terry cloth, 30S cotton yarn as the base yarn, and a 28-needle single-sided machine to prepare a terry cloth grey cloth;

[0068] (5) The knitted grey fabric is first passed through a setting machine with a setting temperature of 130° C. and a setting speed of 24 m / min, thereby ensuring that the low-melting-point composite fiber maintains the original state and can be dyed, napped, sheared, and other treatments in the subsequent finishing process; during the dyeing process, a 6% sodium carbonate solution is added for alkaline treatment and the pH is adjusted to 10; then, the knitted grey fabric is post-set for melt bonding with a post-setting temperature of 165° C. and a setting speed of 24 m / min, and then other finishing processes are performed to prepare the textile fabric.

[0069] Example 2

[0070] (1) A low-melting point composite fiber having a point-core cross-sectional structure with three points and a conventional melting point nylon component as a core and a low-melting point polyester component as a point is prepared with a mass ratio of a low-melting point polyester component to a conventional melting point nylon component of 30:70, wherein the melting point temperature of the low-melting point nylon component is 180° C., and the area of ​​the low-melting point polyester component embedded in the outer periphery of the conventional melting point nylon component accounts for 30% of the entire cross-sectional area of ​​the low-melting point polyester component. The low-melting point composite fiber is a short fiber with a specification of 1.5D×38 mm;

[0071] (2) mixing viscose fiber, conventional polyester staple fiber and low melting point composite fiber in a mass ratio of 20:50:30, wherein the melting point temperature of the conventional polyester staple fiber is 240°C;

[0072] (3) preparing 40S yarn from the blended fiber in step (2) by ring spinning;

[0073] (4) the yarns in step (3) are used as warp yarns and weft yarns, and are woven into woven fabrics through a 2 / 1 weaving structure;

[0074] (5) The woven grey fabric is first passed through a setting machine with a setting temperature of 170° C. and a setting speed of 18 m / min, thereby ensuring that the low-melting-point composite fiber maintains the original state and can be dyed, napped, sheared, and other treatments in the subsequent finishing process; during the dyeing process, a 7% sodium carbonate solution is added for alkaline treatment and the pH is adjusted to 11; then, the fabric is post-set for melt bonding with a post-setting temperature of 190° C. and a setting speed of 18 m / min, and then other finishing processes are performed to prepare the textile fabric.

[0075] Example 3

[0076] (1) A low-melting point composite fiber having a point-core cross-sectional structure with four points and a conventional melting point polyester component as a core and a low-melting point polyester component as a point is prepared with a mass ratio of a low-melting point polyester component to a conventional melting point polyester component of 50:50, wherein the melting point temperature of the low-melting point polyester component is 130° C., and the area of ​​the low-melting point polyester component embedded in the outer periphery of the conventional melting point polyester component accounts for 80% of the entire cross-sectional area of ​​the low-melting point polyester component, and the low-melting point composite fiber is a staple fiber with a specification of 1.5D×38 mm;

[0077] (2) viscose fiber, conventional polyester staple fiber and low melting point composite fiber are mixed in a mass ratio of 40:50:10, wherein the melting point temperature of the conventional polyester staple fiber is 230°C;

[0078] (3) preparing a core-spun yarn of 20S+40D spandex from the blended fiber in step (2) by a ring spinning core-spun yarn process;

[0079] (4) The yarn in step (3) is the weft yarn, the conventional indigo yarn is the warp yarn, and the 3 / 1T / R twill weave is used to prepare the stretch denim fabric;

[0080] (5) The stretch denim grey fabric is first passed through a setting machine with a setting temperature of 100°C and a setting speed of 25 m / min, so as to ensure that the low-melting-point composite fiber maintains the original state and can be dyed, napped, sheared and other treatments in the subsequent finishing process; during the dyeing process, a 7% sodium carbonate solution is added for alkaline treatment and the pH is adjusted to 11; then, the fabric is post-formed for melt bonding with a post-formation temperature of 150°C and a setting speed of 25 m / min, and then other finishing processes are performed to prepare the textile fabric.

[0081] Example 4

[0082] (1) The mass ratio of the low-melting-point nylon component to the conventional melting-point polyester component is 20:80, and a low-melting-point composite fiber filament having a point-core cross-sectional structure with two points and a conventional melting-point polyester component as a core and a low-melting-point nylon component as a point is prepared, wherein the melting point temperature of the low-melting-point nylon component is 150°C, and the area of ​​the low-melting-point nylon component embedded in the outer periphery of the conventional melting-point nylon component accounts for 50% of the entire cross-sectional area of ​​the low-melting-point polyester component, and the low-melting-point composite fiber filament 75D24f is a connecting wire for a double-sided air layer fabric; and then a low-melting-point composite staple fiber with a specification of 1.5D×38mm is prepared by the same process as above;

[0083] (2) mixing viscose fiber, conventional polyester staple fiber and low melting point composite staple fiber in a mass ratio of 35:50:15, wherein the melting point temperature of the conventional polyester staple fiber is 250°C;

[0084] (3) preparing 40S yarn from the blended fiber in step (2) by siro spinning process;

[0085] (4) The yarn in step (3) is the front and back yarn, the low melting point composite fiber filament is the connecting yarn, a double-sided 28-needle circular knitting machine, and a double-sided air layer structure are prepared into a knitted fabric;

[0086] (5) The knitted grey fabric is first passed through a setting machine with a pre-setting temperature of 160° C. and a setting speed of 24 m / min; then dyed, during which a 6% sodium carbonate solution is added for alkali treatment and the pH value is adjusted to 10; the post-setting temperature is 165° C. and the setting speed is 24 m / min, and then other post-finishing processes are performed to prepare a textile fabric.

[0087] Example 5

[0088] (1) A low-melting-point composite fiber having a point-core cross-sectional structure with two points and a conventional melting point polyester component as a core and a low-melting-point composite fiber as a point is prepared with a mass ratio of a low-melting-point nylon component to a conventional melting point polyester component of 20:80, wherein the melting point temperature of the low-melting-point composite fiber is 150° C., the area of ​​the low-melting-point composite fiber embedded in the outer periphery of the conventional melting point polyester component accounts for 50% of the entire cross-sectional area of ​​the low-melting-point composite fiber, and the low-melting-point composite fiber is a staple fiber with a specification of 1.5D×38 mm;

[0089] (2) mixing viscose fiber, conventional polyester staple fiber and low melting point composite fiber in a mass ratio of 35:50:15, wherein the melting point temperature of the conventional polyester staple fiber is 250°C;

[0090] (3) preparing 40S yarn from the blended fiber in step (2) by a compact siro spinning process;

[0091] (4) The yarn in step (3) is the veil, polyester filament 50D 36f is the connecting thread, a double-sided 28-needle circular knitting machine, and a double-sided T / R twill weave are prepared into a knitted fabric;

[0092] (5) The knitted grey fabric is first passed through a setting machine with a pre-setting temperature of 160° C. and a setting speed of 24 m / min; then dyed, during which a 6% sodium carbonate solution is added for alkali treatment and the pH value is adjusted to 10; the post-setting temperature is 165° C. and the setting speed is 24 m / min, and then other post-finishing processes are performed to prepare a textile fabric.

[0093] Comparative Example 1

[0094] On the basis of Example 1, the low melting point composite fiber was removed from the raw material, and other conditions remained unchanged. The performance parameters of the obtained textile fabric are shown in Table 1.

[0095] Comparative Example 2

[0096] On the basis of Example 1, the low-melting point composite fiber is replaced with a core-skin type cross-section structure with conventional melting point polyester fiber as the core and low-melting point nylon fiber as the skin, and other conditions remain unchanged. The performance parameters of the obtained textile fabric are shown in Table 1.

[0097] Comparative Example 3

[0098] On the basis of Example 1, the low-melting-point composite fiber is directly replaced by a single-component low-melting-point nylon fiber, and other conditions remain unchanged. The performance parameters of the obtained textile fabric are shown in Table 1.

[0099] Comparative Example 4

[0100] On the basis of Example 1, the post-setting temperature is set to be lower than the melting point of the low-melting component in the low-melting composite fiber, and other conditions remain unchanged. The performance parameters of the obtained textile fabric are shown in Table 1.

[0101] Comparative Example 5

[0102] On the basis of Example 1, the grey cloth was not subjected to alkali treatment during the dyeing process, and other conditions remained unchanged. The performance parameters of the obtained textile fabric are shown in Table 1.

[0103] Comparative Example 6

[0104] On the basis of Example 1, the area of ​​the low-melting-point nylon component embedded into the periphery of the conventional melting-point polyester component is adjusted to 5% of the entire cross-sectional area of ​​the low-melting-point nylon component, and other conditions remain unchanged. The performance parameters of the obtained textile fabric are shown in Table 1.

[0105] Comparative Example 7

[0106] On the basis of Example 1, the area of ​​the low-melting-point nylon component embedded in the periphery of the conventional melting-point polyester component is adjusted to 100% of the entire cross-sectional area of ​​the low-melting-point nylon component, and other conditions remain unchanged. The performance parameters of the resulting textile fabric are shown in Table 1.

[0107] Experimental Example 1

[0108] This experimental example tests the textile fabric samples prepared in Examples 1 to 5 and Comparative Examples 1 to 5, and the test results are shown in Table 1:

[0109] Table 1 Performance parameters of textile fabrics

[0110]

[0111]

[0112] As shown in Table 1, Comparative Example 1 is used as a blank control, and only viscose fiber and conventional polyester staple fiber are used as raw materials to prepare textile fabrics. Due to the lack of low-melting point composite fiber, the low-melting point composite fiber will not melt when heated in the post-finishing process, and the viscose fiber and the conventional polyester staple fiber will not stick together. That is, there is a lack of interfacial cohesion between the viscose fiber and the conventional polyester staple fiber, and relative movement is likely to occur, and the prepared textile fabric is prone to pilling problems.

[0113] Although low-melting-point composite fibers are added as raw materials to prepare textile fabrics in Comparative Example 2, since the low-melting-point composite fibers used are of a skin-core cross-section structure with conventional melting point polyester as the core and low-melting point nylon as the skin, the low-melting point nylon is firmly wrapped around the periphery of the conventional melting point polyester, and the surface area of ​​the low-melting point nylon is increased many times. When the setting temperature exceeds the melting point temperature of the low-melting-point composite fibers, too much contact area is caused for adhesion and consolidation between the fibers, resulting in the final textile fabric being too stiff, poorly soft, and not very comfortable to wear.

[0114] In Comparative Example 3, the single-component low-melting-point nylon fiber is directly mixed with the viscose fiber and the conventional polyester staple fiber. Compared with the low-melting-point composite fiber with a point-core cross-sectional structure in the present application, since there is no conventional polyester component in the single-component low-melting-point nylon fiber, when the shaping temperature exceeds the melting point of the low-melting-point nylon fiber, the entire fiber will be adhered and consolidated with other fibers, lacking the softness brought to the fabric by the non-melting conventional polyester component, making the adhesion area feel hard, resulting in the final textile fabric being too stiff and poor in wearing comfort. At the same time, if all low-melting-point nylon is used, its cost will increase significantly.

[0115] In Comparative Example 4, when the post-setting temperature is lower than the melting point of the low-melting-point component in the low-melting-point composite fiber, the low-melting-point component will not melt and adhere to other fibers during the post-setting treatment, and there will be no adhesion when hot melt fibers separate during the dyeing process. Therefore, the prepared textile fabric has no anti-pilling effect, and is the same as ordinary products.

[0116] In Comparative Example 5, due to the lack of the alkali treatment process, the low-melting-point component in the low-melting-point composite fiber will not break and peel into discontinuous points, and its position will not change, and it cannot form dispersed and uniform adhesion and consolidation points with other surrounding fibers. Although it has good anti-pilling effect, it cannot carry out the cotton scouring process, which seriously affects the quality of the fabric.

[0117] In Comparative Example 6, the area of ​​the low-melting-point nylon component embedded in the periphery of the conventional melting-point polyester component accounts for too small a proportion of the entire cross-sectional area of ​​the low-melting-point nylon component, only 5%. This results in the phenomenon of two components being easily separated during the preparation of the low-melting-point composite fiber, which seriously affects the spinnability of the fiber, and therefore makes it impossible to carry out subsequent fabric performance testing.

[0118] In Comparative Example 7, the area of ​​the low-melting-point nylon component embedded in the periphery of the conventional melting-point polyester component accounts for 100% of the entire cross-sectional area of ​​the low-melting-point nylon component, that is, the entire low-melting-point component is surrounded by the conventional melting-point component. Although the low-melting-point component is melted by heat during the subsequent shaping of the fabric, it cannot contact and adhere to the viscose fiber and the conventional polyester staple fiber, and has no anti-pilling effect. Even after alkali treatment, a small part of the low-melting-point component may be able to contact the outside, but because it cannot be peeled off from the core, the anti-pilling effect is limited.

[0119] In Examples 1 to 5, low-melting-point composite fibers with a point-core cross-sectional structure are mixed with viscose fibers and conventional polyester staple fibers, and the low-melting-point component in the low-melting-point composite fibers is easily melted when heated at a certain temperature, thereby adhering to other fibers, increasing the interfacial cohesion between the fibers, and reducing or avoiding the pilling of textile fabrics; at the same time, due to the point-core cross-sectional structure of the low-melting-point composite fibers, the area of ​​the low-melting-point component embedded in the periphery of the conventional melting-point component has a suitable proportion in the entire cross-sectional area of ​​the low-melting-point component, so that the consolidation point is reduced on the basis of ensuring the interfacial cohesion between the low-melting-point composite fibers and other fibers, with less material consumption and low cost; the gaps between the fibers are increased, the mechanical properties of the textile fabric are effectively improved, and the overall texture of the textile fabric is softer, more comfortable, and more commercially valuable.

[0120] In addition, Examples 1-3 require a napping step. Since the yarn is a short-fiber blended yarn, there will be broken fine hair fibers in the fabric after napping, which are easy to fall off during subsequent processing and use. Adding a certain proportion of low-melting-point composite short-fiber fibers to the yarn can effectively solve the problem of hair loss; in Example 4, polyester filaments need to be used as connecting wires for double-sided knitted fabrics. If ordinary conventional polyester filaments are used, they are likely to be exposed on the surface of the fabric, and ordinary conventional polyester filaments are easily broken by snagging, resulting in pilling. The use of low-melting-point composite filaments can effectively solve the problem of filament snagging and greatly improve the wearing performance of the fabric.

[0121] Experimental Example 2

[0122] In this experimental example, on the basis of Example 1, the mass ratio of the low-melting-point nylon component to the conventional melting-point polyester component in the low-melting-point composite fiber was changed, and other conditions remained unchanged, to obtain Comparative Examples 8 to Comparative Examples 12, and the properties of the prepared textile fabrics were tested. The test results are shown in Table 2:

[0123] Table 2 Performance parameters of textile fabrics

[0124]

[0125] As can be seen from Table 2, according to the preparation method of the textile fabric in the present application, the mass ratio of the low-melting point nylon component to the conventional melting point polyester component in the low-melting point composite fiber is changed. When the mass ratio of the low-melting point nylon component to the conventional melting point polyester component is within the range of (10:90) to (50:50) specified in the present application, such as Comparative Examples 9 to 11 and Example 1, the textile fabric has a better anti-pilling effect and a more appropriate softness, especially when the mass ratio of the low-melting point nylon component to the conventional melting point polyester component is within the range of (20:80) to (30:70), such as Example 1 and Comparative Example 10, the textile fabric has a relatively better anti-pilling effect and the most appropriate softness. In addition, while meeting the performance requirements, technical and economic aspects are also easier to achieve.

[0126] However, when the mass ratio of the low-melting point nylon component to the conventional melting point polyester component exceeds the above-mentioned limited range, such as in Comparative Example 8, when the low-melting point nylon component decreases to a certain level, the spinnability of the low-melting point composite fiber is seriously affected, and it may even be impossible to prepare it. Even if a small amount of sample can be obtained, the small amount of low-melting point component leads to fewer adhesion points, and the anti-pilling effect does not meet the requirements. For example, in Comparative Example 12, the low-melting point nylon component is obviously too high. Although the anti-pilling effect is good, the fabric feels obviously too hard, and as the low-melting point component increases, its cost also increases accordingly.

[0127] Experimental Example 3

[0128] In this experimental example, on the basis of Example 1, the number of midpoints of the low-melting-point composite fiber was changed, and other conditions remained unchanged, to obtain Comparative Examples 13 to 15, and the properties of the prepared textile fabrics were tested. The test results are shown in Table 3:

[0129] Table 3 Performance parameters of textile fabrics

[0130]

[0131] Under the premise that the mass ratio of the low-melting-point nylon component to the conventional melting-point polyester component in the low-melting-point composite fiber remains unchanged, as the number of points increases, the size of each point becomes smaller, and the prepared fabric has more and more adhesion points after shaping; the cross-sectional structure diagram of the low-melting-point composite fiber in Comparative Example 13 is shown in Figure 2The cross-sectional structure diagram of the low melting point composite fiber in Example 1 is shown in FIG. Figure 1 The cross-sectional structure diagram of the low melting point composite fiber in Comparative Example 14 is shown in FIG. Figure 3 The cross-sectional structure diagram of the low melting point composite fiber in Comparative Example 15 is shown in FIG. Figure 4 shown.

[0132] It can be seen from Table 3 that, under the premise that the mass ratio of the low-melting point nylon component to the conventional melting point polyester component remains unchanged, the number of midpoints of the low-melting point composite fiber is changed. When the number of midpoints of the low-melting point composite fiber is 1 or 2, the obtained textile fabric has the most appropriate stiffness while ensuring the anti-pilling effect.

[0133] When the number of points in the low-melting point composite fiber is 3 or 4, the excessive number of adhesion points will cause the fabric to be slightly harder than the optimal condition after shaping. In addition, compared with other numbers of points, the difficulty of preparing the low-melting point composite fiber with 3 or 4 points is relatively high.

[0134] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A yarn, characterized in that: The invention comprises natural fiber / regenerated fiber, conventional polyester staple fiber and low-melting-point composite fiber. The cross-sectional structure of the low-melting-point composite fiber is a point-core structure, and the components of the points are distributed at intervals on the periphery of the components of the core.

2. A yarn according to claim 1, characterized in that: The low melting point composite fiber comprises a conventional melting point polyester / nylon component and a low melting point polyester / nylon component, the core is the conventional melting point polyester / nylon component, and the core is the low melting point polyester / nylon component; The low melting point polyester / nylon component is embedded into the outer periphery of the conventional melting point polyester / nylon component to form an integrated monofilament; Preferably, the area of ​​the low-melting polyester / nylon component embedded in the periphery of the conventional melting point polyester / nylon component accounts for 20% to 80% of the entire cross-sectional area of ​​the low-melting point polyester / nylon component, preferably 40% to 60%; Preferably, the number of the points is 1 to 4, more preferably 1 to 2.

3. A yarn according to claim 2, characterized in that: The mass ratio of the low melting point polyester / nylon component to the conventional melting point polyester / nylon component is (10:90) to (50:50), preferably (20:80) to (30:70); Preferably, the cross-sectional area of ​​the low melting point polyester / nylon component is smaller than the cross-sectional area of ​​the conventional melting point polyester / nylon component.

4. A yarn according to claim 2 or 3, characterized in that: The melting point of the low-melting-point polyester / nylon component is 100°C to 200°C.

5. A yarn according to any one of claims 1 to 4, characterized in that: The mass ratio of the natural fiber / regenerated fiber, conventional polyester staple fiber and low-melting-point composite fiber is (10-50): (50-90): (5-30), preferably (10-35): (50-90): (10-15); Preferably, the mass percentage of the low-melting-point composite fiber in the textile fabric is 5% to 30%, preferably 5% to 15%.

6. A textile fabric, characterized in that: The invention is prepared by using a yarn as described in any one of claims 1 to 5.

7. A method for preparing a textile fabric, characterized in that: For preparing a yarn as claimed in any one of claims 1 to 5 and a textile fabric as claimed in claim 6, the method comprises: (1) mixing natural fiber / regenerated fiber, conventional polyester staple fiber and low melting point composite fiber according to mass percentage; (2) forming yarn from the fibers mixed in step (1) by a spinning process; (3) preparing the yarn into a grey cloth; (4) The grey cloth is prepared into textile fabric through finishing process.

8. The method for preparing a textile fabric according to claim 7, characterized in that: In step (1), the mass ratio of the natural fiber / regenerated fiber, conventional polyester staple fiber and low-melting point composite fiber when mixed is (10-50): (50-90): (5-30), preferably (10-35): (50-90): (10-15); Preferably, in step (3), the yarn is prepared into a grey cloth alone or together with other functional fibers.

9. The method for preparing a textile fabric according to claim 7, characterized in that: The post-finishing process in step (4) includes pre-setting and post-setting, wherein the pre-setting temperature is 0°C to 50°C higher or lower than the melting point temperature of the low-melting polyester / nylon component in the low-melting composite fiber, preferably 10°C to 20°C; and the post-setting temperature is 10°C to 30°C higher than the melting point temperature of the low-melting polyester / nylon component in the low-melting composite fiber, preferably 10°C to 20°C.

10. The method for preparing a textile fabric according to claim 7, characterized in that: The post-finishing process in step (4) includes dyeing, during which 6% to 12% alkali solution is added for alkali treatment to adjust the pH to 10 to 12.

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