Composite fabric and preparation method therefor, and textile

Abstract

The present invention relates to the technical field of textiles, and specifically relates to a composite fabric and a preparation method therefor, and a textile. The composite fabric is formed by sequentially hot-melt laminating a first fabric layer, a membrane layer, a comfort layer, and a second fabric layer in the thickness direction by means of an adhesive; the first fabric layer and the membrane layer, as well as the membrane layer and the comfort layer, are laminated by means of a dot-patterned hot-melt adhesive; the material of the membrane layer is a polytetrafluoroethylene membrane or a modified polytetrafluoroethylene membrane. In the present application, a polytetrafluoroethylene membrane or a modified polytetrafluoroethylene membrane having waterproof, moisture-permeable and air-permeable properties is selected as the material of the membrane layer, and the first fabric layer and the membrane layer, as well as the membrane layer and the comfort layer, are laminated by means of a dot-patterned hot-melt adhesive, thereby avoiding the technical problems of poor air permeability and poor moisture permeability caused by an adhesive covering the contact surface between the membrane layer and an adjacent layer in the lamination process. Thus, the composite fabric simultaneously possesses air permeability, waterproofness, and moisture permeability, and the comfort of the composite fabric is improved.

Description

A composite fabric, its preparation method and textile Technical Field

[0001] This invention belongs to the field of textile technology, specifically relating to a composite fabric, its preparation method, and the textile thereof. Background Technology

[0002] Currently, commercially available bedding products, such as mattress protectors, mattress covers, and mattress pads, typically use composite fabrics as a protective layer to prevent liquids from penetrating into the mattress, thus avoiding cleaning difficulties and hygiene problems caused by stains. These composite fabrics usually have a certain degree of water resistance and breathability to cope with common liquid stains in daily life, such as bedwetting in children, incontinence in the elderly, menstrual periods, and pet stains. However, although existing mattress protectors can effectively prevent liquid penetration, they have the following shortcomings in terms of breathability: poor breathability, especially during prolonged use, may cause users to feel stuffy and uncomfortable, thereby affecting sleep quality. This is particularly important for users who have long-term contact with bedding, such as pregnant women, infants, and the elderly.

[0003] Existing waterproof and breathable composite fabrics (such as those used in outdoor jackets) offer high levels of waterproofing and breathability, but their focus is primarily on enhancing windproof performance, resulting in poor breathability. These fabrics are unsuitable for use as mattress protectors in household bedding because their excessive emphasis on waterproofing and windproofing neglects the need for breathability in bedding.

[0004] In summary, there is an urgent need to develop a composite fabric with good waterproof performance, so that the fabric can simultaneously have high moisture permeability and breathability, effectively preventing liquid from seeping into the mattress without affecting the comfort of the bedding, especially in hot weather or during long-term use, so as to maintain good breathability and avoid discomfort caused by stuffiness or sweating. Summary of the Invention

[0005] In view of this, the present invention provides a composite fabric, its preparation method and textile, to solve the problems of the above-mentioned composite fabrics having only waterproof and moisture-permeable properties and poor breathability, and to give the fabric good waterproof properties, so that the fabric also has high moisture permeability and breathability, effectively preventing liquid from penetrating into the mattress without affecting the comfort of the bedding, especially in hot weather or when used for a long time, it can maintain good breathability and avoid discomfort caused by stuffiness or sweating.

[0006] The inventors also discovered that in related technologies, composite fabrics are usually made by bonding with adhesives. However, during the bonding process, adhesives reduce the contact area between the film layer and adjacent layers, resulting in poor air permeability and poor moisture permeability.

[0007] To achieve the above solution, the technical solution of the present invention is as follows:

[0008] In the first aspect, this application provides a composite fabric, which is formed by bonding a first fabric layer, a membrane layer, a comfort layer, a spacer fabric layer, and a second fabric layer sequentially along the thickness direction using an adhesive. The first fabric layer and the membrane layer, as well as the membrane layer and the comfort layer, are bonded together by point-to-point hot-melt bonding using an adhesive. The membrane layer is made of polytetrafluoroethylene (PTFE) membrane or a membrane formed of modified polytetrafluoroethylene.

[0009] Optionally, the material of the first fabric layer is an anti-slip fabric, knitted fabric, or brushed fabric formed from at least one of natural fibers, polyester fibers, and polyurethane fibers.

[0010] It should be noted that, in this application, the term "knitted fabric" refers to a fabric formed by bending yarns into loops and interlocking them with knitting needles.

[0011] Optionally, the pore size formed by the polytetrafluoroethylene or modified polytetrafluoroethylene is 5-15 μm, preferably 6-15 μm.

[0012] Optionally, the thickness of the film layer is 5-15 μm, preferably 6-10 μm.

[0013] Optionally, the comfort layer may be made of sponge, fiber felt, foam, or silicone cotton.

[0014] Optionally, the sponge is selected from polyurethane sponge, polyvinyl alcohol sponge, or polyester sponge.

[0015] Optionally, the thickness of the comfort layer is 0.1-0.3 cm, preferably 0.15-0.3 cm.

[0016] Optionally, the material of the second fabric layer is a natural fiber fabric, a polyester fiber fabric, or a woven fabric, knitted fabric, or brushed fabric formed by natural fibers and polyester fibers.

[0017] It should be noted that, in this application, the term "woven fabric" refers to a fabric made by intertwining or weaving yarns together.

[0018] Optionally, the adhesive located between the first fabric layer and the membrane layer, and between the membrane layer and the comfort layer, is selected from a first adhesive, which is selected from a moisture-curing reactive polyurethane hot melt adhesive (i.e., PUR hot melt adhesive) with a viscosity of 3400-5000 cps at a temperature of 90°C.

[0019] Optionally, the comfort layer and the second fabric are bonded together by a mesh of adhesive through a hot-melt bonding process.

[0020] Optionally, the areal density of the adhesive in the adhesive regions located between the first fabric layer and the film layer, and between the film layer and the comfort layer, is 5-10 g / m². 2 Preferably 6-10 g / m 2 .

[0021] Optionally, the areal density of the adhesive in the adhesive region between the comfort layer and the second fabric layer is 10-20 g / m². 2 The preferred concentration is 12-20 g / m³. 2 .

[0022] Optionally, the adhesive located between the comfort layer and the second fabric is selected from a second adhesive, which is selected from a moisture-curing reactive polyurethane hot melt adhesive with a viscosity of 4500-6000 cps at a temperature of 110°C.

[0023] Optionally, the thickness of the adhesive is 20-50 μm, preferably 25-50 μm.

[0024] Optionally, the composite fabric further includes a spacer fabric layer located between the comfort layer and the second fabric layer.

[0025] Optionally, the spacer fabric layer is made of at least one of natural fibers and polyester fibers.

[0026] It should be noted that, in this application, the term "spaced fabric" refers to a fabric formed by several sets of yarns forming two or more layers of fabric, and by another set of yarns connecting the layers of fabric together.

[0027] Optionally, the thickness of the spacer fabric layer is 0.2-0.4 cm, preferably 0.25-0.4 cm.

[0028] Optionally, the spacer fabric layer and the comfort layer, as well as the spacer fabric layer and the second fabric, are all bonded together by a second adhesive mesh hot melt composite.

[0029] Optionally, the areal density of the adhesive in the adhesive regions located between the spacer fabric layer and the comfort layer, and between the spacer fabric layer and the second fabric layer, is 10-20 g / m². 2 The preferred concentration is 12-20 g / m³. 2 .

[0030] Optionally, the second fabric layer has a plurality of recesses, all of which are interconnected.

[0031] Optionally, the bottom surface of the first fabric layer is provided with a number of anti-slip points.

[0032] Secondly, this application also provides a method for preparing the composite fabric as described above, the method comprising the following steps:

[0033] The first fabric layer and the film layer are bonded together using the adhesive, then pressed, cooled, subjected to moisture reaction, and cured. The first fabric layer is then bonded together with the comfort layer, pressed, cooled, subjected to moisture reaction, and cured. The second fabric layer is then bonded together with the first fabric layer, pressed, cooled, subjected to moisture reaction, and cured to obtain the composite fabric.

[0034] Optionally, the first fabric layer and / or film may be corona treated prior to bonding.

[0035] Optionally, when the adhesive is selected from the first adhesive, the coating temperature of the adhesive is 90-100°C, preferably 95-100°C.

[0036] Optionally, when the adhesive is selected from the second adhesive, the coating temperature of the adhesive is 110-120°C, preferably 115-120°C.

[0037] Optionally, when the adhesive is selected from the first adhesive, the open time of the adhesive is 15-30s, preferably 16-30s.

[0038] Optionally, when the adhesive is selected from the second adhesive, the open time of the adhesive is 25-45s, preferably 26-45s.

[0039] Optionally, the coating speed of the adhesive is 40-60 m / min, preferably 45-60 m / min.

[0040] Optionally, the pressing pressure is 40-60N, preferably 45-60N.

[0041] Optionally, the relative humidity of the moisture reaction is 60%RH-70%RH, preferably 65%RH-70%RH.

[0042] Optionally, the duration of the moisture reaction is 15-45 seconds, preferably 20-45 seconds.

[0043] Optionally, the cooling rate is 3-5°C / min, preferably 3.5-5°C / min.

[0044] Optionally, after the final curing, the process further includes the step of hot pressing to form a plurality of recesses, all of which are interconnected.

[0045] Optionally, the hot pressing temperature is 180-220℃, preferably 200-220℃; the hot pressing pressure is 0.3-0.5 MPa, preferably 0.3-0.5 MPa; and the hot pressing duration is 24-48 h, preferably 25-48 h.

[0046] Thirdly, this application also provides a textile product made of the composite fabric described above or a composite fabric prepared according to the method described above.

[0047] In this application, textiles include, but are not limited to: mattress protectors (covers), bed covers, mattress protectors, bed covers, etc.

[0048] As described above, the composite fabric and its preparation method of the present invention, as well as the textiles thereof, have the following beneficial effects:

[0049] This application selects a polytetrafluoroethylene (PTFE) membrane or a modified PTFE membrane with waterproof, moisture-permeable, and breathable properties as the membrane material. The first fabric layer and the membrane layer, as well as the membrane layer and the comfort layer, are bonded together by point-to-point hot-melt adhesive bonding. This avoids the technical problems of poor breathability and poor moisture permeability caused by adhesive covering the contact surface between the membrane layer and adjacent layers during the bonding process. As a result, the composite fabric has the characteristics of breathability, waterproofness, and moisture permeability, thus improving the comfort of the composite fabric.

[0050] This application selects a low-modulus, high-elasticity moisture-curing reactive polyurethane hot melt adhesive (i.e., PUR hot melt adhesive) as the adhesive in the composite process, and combines it with dot-matrix hot melt composite technology. This can improve flexibility and comfort while ensuring the adhesion between the film layer and adjacent layers. It avoids the technical problems of poor air permeability and poor moisture permeability caused by the contact surface between the film layer and adjacent layers during the composite process, thereby improving the air permeability and moisture permeability of the composite fabric.

[0051] This application uses a membrane with a specific pore size and thickness (5-15 μm pore size and 5-15 μm thickness) to sequentially bond the first fabric layer, the membrane layer, the comfort layer, and the second fabric layer along the thickness direction using an adhesive to heat-melt composite fabric. This avoids the technical problem of poor air permeability and poor moisture permeability caused by the adhesive covering the contact surface between the membrane layer and adjacent layers during the bonding process, thereby further improving the air permeability and moisture permeability of the composite fabric.

[0052] This application controls parameters such as adhesive coating density, coating speed, and coating temperature within a specific range, which can ensure the bonding effect while avoiding the problems of poor air permeability and poor moisture permeability caused by adhesive covering the contact surface during the composite process. This improves the air permeability and moisture permeability of the composite fabric, thereby enabling the composite fabric to take into account waterproof performance, air permeability, and moisture permeability.

[0053] This application, by controlling the cooling rate within a specific range, can prevent uneven adhesive layer or air bubbles, ensure the smoothness of the composite fabric, avoid the adverse effects on breathability and moisture permeability caused by air bubbles or uneven adhesive layer, and thus improve the breathability and moisture permeability of the fabric.

[0054] This application improves the breathability and moisture permeability of composite fabrics by controlling the relative humidity of the moisture reaction within a specific range, while ensuring the bonding effect and avoiding the problems of poor air permeability and poor moisture permeability caused by the adhesive covering the contact surfaces of each layer during the composite process.

[0055] This application, by adding a hot-pressing step after the final curing, enables the surface of the composite fabric to form several recesses, and creates a moisture-permeable channel between all the recesses that facilitates the flow of heat and prevents the evaporation of sweat, thereby improving the breathability, moisture permeability and comfort of the composite fabric. Attached Figure Description

[0056] Figure 1 is a cross-sectional view of the composite fabric of Example 1, wherein 1-first fabric layer, 2-film layer, 3-comfort layer, 4-spacer fabric layer, and 5-second fabric layer;

[0057] Figure 2 is a top view of the composite fabric of Example 1. Detailed Implementation

[0058] The present invention will be further illustrated by specific examples below. However, it should be noted that the specific material ratios, process conditions and results described in the embodiments of the present invention are only for illustrating the present invention and cannot be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

[0059] One embodiment of this application provides a composite fabric, which is composed of a first fabric layer, a film layer with a thickness of 5-15 μm, a comfort layer with a thickness of 0.1-0.3 cm, and a second fabric layer, which are sequentially bonded together along the thickness direction by an adhesive with a thickness of 20-50 μm.

[0060] The first fabric layer and the membrane layer, as well as the membrane layer and the spacer fabric layer, are bonded together by a first adhesive in a dotted hot-melt manner. The areal density of the first adhesive in the bonding area between the first fabric layer and the membrane layer, or between the membrane layer and the comfort layer, is 5-10 g / m². 2The first adhesive is selected from a moisture-curing reactive polyurethane hot melt adhesive with a viscosity of 3400-5000 cps at 90℃; the first fabric layer is made of at least one of natural fibers, polyester fibers and polyurethane fibers to form an anti-slip fabric, knitted fabric or brushed fabric; the membrane layer is made of polytetrafluoroethylene membrane or modified polytetrafluoroethylene membrane, and the pore size of the polytetrafluoroethylene membrane or modified polytetrafluoroethylene membrane is 5-15μm.

[0061] The comfort layer and the second fabric are bonded together by a second adhesive mesh through hot-melt bonding. The areal density of the second adhesive in the bonding area between the comfort layer and the second fabric layer is 10-20 g / m². 2 The second adhesive is selected from a moisture-curing reactive polyurethane hot melt adhesive with a viscosity of 4500-6000cps at 110℃. The material of the comfort layer is sponge, fiber felt, foam or silicone cotton.

[0062] The second fabric layer is made of woven, knitted, or brushed fabric formed from at least one of natural fibers and polyester fibers.

[0063] In another embodiment of the present invention, the composite fabric further includes a spacer fabric layer with a thickness of 0.2-0.4 cm, which is located between the comfort layer and the second fabric layer. The spacer fabric layer and the comfort layer, as well as the spacer fabric layer and the second fabric layer, are bonded together by a second adhesive mesh through hot-melt bonding. The areal density of the second adhesive in the bonding areas between the spacer fabric layer and the comfort layer, and between the spacer fabric layer and the second fabric layer, is 10-20 g / m². 2 The spacer fabric layer is made of at least one of natural fibers and polyester fibers.

[0064] In another embodiment of the present invention, the second fabric layer is provided with a plurality of recesses, all of which are interconnected, and the depth of the recesses is 40-60μm.

[0065] Another embodiment of this application also provides a method for preparing the composite fabric as described above, comprising the following steps:

[0066] The first fabric layer and the film layer are bonded together at a speed of 40-60 m / min using a first adhesive, pressed under a pressure of 40-60 N, cooled, and subjected to a moisture reaction at a relative humidity of 60%-70% RH for 15-45 s to cure. Then, the first fabric layer is bonded together at a speed of 40-60 m / min using a first adhesive, pressed under a pressure of 40-60 N, cooled, and subjected to a moisture reaction at a relative humidity of 60%-70% RH for 15-45 s to cure. Finally, the second fabric layer is bonded together at a speed of 40-60 m / min using a second adhesive, pressed under a pressure of 40-60 N, cooled, and subjected to a moisture reaction at a relative humidity of 60%-70% RH for 15-45 s to cure, thus obtaining the composite fabric.

[0067] In another embodiment of this application, after the final curing, the method further includes the following step: hot pressing at a temperature of 180-220°C and a pressure of 0.3-0.5 MPa for 24-48 hours to form a plurality of recesses, all of which are interconnected.

[0068] Another embodiment of this application also provides a textile fabric made of the composite fabric described above or a composite fabric prepared according to the method described above.

[0069] The present invention will be described in detail below through specific examples and embodiments. It should also be understood that the following embodiments are only for specific illustration of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-essential improvements and adjustments made by those skilled in the art based on the above description of the present invention are within the scope of protection of the present invention. The specific process parameters, etc., in the following examples are merely examples within a suitable range; that is, those skilled in the art can make appropriate selections within the appropriate range based on the description herein, and are not intended to be limited to the specific values ​​in the examples below.

[0070] Example 1

[0071] A method for preparing a composite fabric, comprising the following specific steps:

[0072] S1. At a temperature of 90℃ and a speed of 40m / min, a spot coating method is used to apply PUR hot melt adhesive A (viscosity of 4200±800cps at 90℃, commercially available) to the surface layer (the layer opposite to the bottom surface) of a 50D 100% polyester weft-knitted single-sided plain fabric (with several anti-slip dots evenly distributed on the bottom surface) using a spot coating method. The open time of PUR hot melt adhesive A is 30s, and the coating density is 5g / m². 2 The coating thickness is 20μm;

[0073] S2. Subsequently, a PTFE membrane with an average pore size of 5 μm and a thickness of 5-8 μm was subjected to corona treatment to obtain a pretreated PTFE membrane; the pretreated PTFE membrane was then bonded to one side of the above-mentioned flat cloth coated with PUR hot melt adhesive, pressed under a pressure of 40 N, cooled by water at a rate of 3 °C / min, subjected to a moisture reaction at a relative humidity of 60% RH for 15 s, and cured for 24 h to obtain the pretreated flat cloth 1;

[0074] S3. Unwind a 0.2cm thick 50D polyurethane foam sheet, and apply the above-mentioned PUR hot melt adhesive A to one side of the polyurethane foam sheet using a dot-coating method at a temperature of 90℃ and a speed of 40m / min. The open time of PUR hot melt adhesive A is 30s, and the coating density is 10g / m³. 2 The coating thickness is 40μm, and then it is bonded to one side of the PTFE film of the pretreated flat cloth 1. It is pressed under a pressure of 40N, cooled by water at a rate of 3℃ / min, and subjected to a moisture reaction at a relative humidity of 60%RH for 15s, and cured for 24h to obtain the pretreated flat cloth 2.

[0075] S4. Unwind a commercially available 0.3cm thick knitted weft-knitted three-dimensional spacer fabric made of polyester fiber. Coat one side of the fabric with PUR hot melt adhesive B (viscosity 5250±750cps at 110℃, commercially available) using a diamond-patterned roller at 110℃ and a speed of 40m / min. The open time of PUR hot melt adhesive B is 45s, and the coating density is 10g / m². 2 The coating thickness is 40μm, and then it is bonded to the polyurethane sponge sheet of the pretreated flat cloth 2. It is pressed under a pressure of 40N, cooled by water at a rate of 3℃ / min, and subjected to a moisture reaction at a relative humidity of 60%RH for 15s, and cured for 24h to obtain the pretreated flat cloth 3.

[0076] S5. A yarn with a density of 29 stitches / inch and a weight of 170 g / m² is made by mixing 40S cotton yarn and 50D T800 high-elastic polyester DTY yarn at a mass ratio of 73.6:26.4. 2 Commercially available knitted fabric was unwound and coated with the aforementioned PUR hot melt adhesive B using a diamond-patterned roller at a temperature of 110°C and a speed of 40 m / min. The open time of PUR hot melt adhesive B was 45 s, and the coating density was 10 g / m². 2 The coating thickness is 40μm, and then it is bonded to the knitted weft three-dimensional spacer fabric of the pretreated plain fabric 3. It is pressed under a pressure of 40N, cooled by water at a rate of 3℃ / min, and subjected to a moisture reaction at a relative humidity of 60%RH for 15s, and cured for 24h to obtain the pretreated plain fabric 4.

[0077] S6. Cut the four edges of the pretreated plain fabric, place it in a mold, and press it at a temperature of 180℃ and a pressure of 0.3Mpa for 48h to form several evenly distributed recesses with a depth of 40μm. All the recesses are interconnected to obtain the composite fabric (as shown in Figure 1 and Figure 2).

[0078] Example 2

[0079] A method for preparing a composite fabric, comprising the following specific steps:

[0080] S1. At a temperature of 100℃ and a speed of 60m / min, the surface layer (i.e., the layer opposite to the bottom surface) of a 50D 100% polyester weft-knitted single-sided plain fabric (brushed bottom surface, commercially available) is applied to the fabric using a dot-coating method with PUR hot melt adhesive A (commercially available). The open time of PUR hot melt adhesive A is 15s, and the coating density is 10g / m². 2 The coating thickness is 40μm;

[0081] S2. Subsequently, a PTFE membrane with an average pore size of 5 μm and a thickness of 5-15 μm was subjected to corona treatment to obtain a pretreated PTFE membrane; the pretreated PTFE membrane was then bonded to the side of the above-mentioned flat cloth coated with PUR hot melt adhesive, pressed under a pressure of 60 N, cooled by water at a rate of 5 °C / min, subjected to a moisture reaction at a relative humidity of 70% RH for 45 s, and cured for 24 h to obtain the pretreated flat cloth 1;

[0082] S3. Then, unwind the 0.2cm thick 50D polyurethane foam sheet, and apply the above-mentioned PUR hot melt adhesive A (commercially available) to one side of the polyurethane foam sheet using a dot-coating method at a temperature of 100℃ and a speed of 60m / min. The open time of PUR hot melt adhesive A is 15s, and the coating density is 20g / m². 2 The coating thickness is 40μm, and then it is laminated with the PTFE film of the pretreated flat cloth 1. It is pressed under a pressure of 60N, cooled by water at a rate of 5℃ / min, and subjected to a moisture reaction at a relative humidity of 70%RH for 45s, and cured for 24h to obtain the pretreated flat cloth 2.

[0083] S4. Unwind a 0.3cm thick knitted weft-knitted three-dimensional spaced fabric made of polyester fiber, and coat one side of the fabric with the aforementioned PUR hot melt adhesive B (commercially available) using a diamond-patterned roller at a temperature of 120℃ and a speed of 60m / min. The open time of PUR hot melt adhesive B is 25s, and the coating density is 20g / m². 2The coating thickness is 40μm, and then it is bonded to the polyurethane sponge sheet of the pretreated flat cloth 2. It is pressed under a pressure of 60N, cooled by water at a rate of 5℃ / min, and subjected to a moisture reaction at a relative humidity of 70%RH for 45s. It is then cured for 24h to obtain the pretreated flat cloth 3.

[0084] S5. A yarn made from 75D / 72F DTY yarn and 30D spandex at a mass ratio of 88:12 has a density of 32 needles / inch and a weight of 230g / m². 2 Commercially available polyester / spandex double-sided fleece knitted fabric was unwound and coated with commercially available PUR hot melt adhesive B on one side of the fabric using a diamond-patterned roller at a temperature of 120°C and a speed of 60 m / min. The open time of PUR hot melt adhesive B was 25 s, and the coating density was 20 g / m². 2 The coating thickness is 40μm, and then it is bonded to the knitted weft three-dimensional spacer fabric of the pretreated plain cloth 3. It is pressed under a pressure of 60N, cooled by water at a rate of 5℃ / min, and subjected to a moisture reaction at a relative humidity of 70%RH for 45s, and cured for 24h to obtain the pretreated plain cloth 4.

[0085] S6. Cut the four edges of the pretreated plain fabric, place it in a mold, and press it at a temperature of 180℃ and a pressure of 0.5Mpa for 24h to form several evenly distributed recesses with a depth of 60μm. All recesses are interconnected to obtain a composite fabric.

[0086] Example 3

[0087] In addition to directly mixing pre-treated plain cloth 2 polyurethane sponge wadding with 40S cotton yarn and 50D T800 high-elastic polyester DTY yarn at a mass ratio of 73.6:26.4 to produce a density of 29 stitches / inch and a weight of 170g / m², 2 In addition to the commercially available knitted fabric, the composite fabric was prepared in the same manner as in Example 1. The difference between this example and Example 1 is that the knitted weft-knitted three-dimensional spacer fabric layer is not included.

[0088] Example 4

[0089] The composite fabric was prepared in the same manner as in Example 1, except for the following conditions:

[0090] S6. Cut the four edges of the pretreated plain fabric to obtain the composite fabric.

[0091] The difference between this embodiment and Embodiment 1 is that hot pressing was not performed.

[0092] Comparative Example 1

[0093] The composite fabric was prepared in the same manner as in Example 1, except that a TPU film with an average pore size of 5 μm and a thickness of 5-8 μm was used instead of a polytetrafluoroethylene film.

[0094] Comparative Example 2

[0095] The composite fabric was prepared in the same manner as in Example 1, except that EVA hot melt adhesive A with a viscosity of 4200±800cps at 90°C was used instead of PUR hot melt adhesive A and EVA hot melt adhesive B with a viscosity of 5250±750cps at 110°C was used instead of PUR hot melt adhesive B.

[0096] Comparative Example 3

[0097] The composite fabric was prepared in the same manner as in Example 1, except that the thickness of the PTFE membrane was 15-20 μm.

[0098] Comparative Example 4

[0099] The composite fabric was prepared in the same manner as in Example 1, except that the thickness of the PTFE membrane was 3-5 μm.

[0100] Comparative Example 5

[0101] The composite fabric was prepared in the same manner as in Example 1, except that the pore size of the PTFE membrane was 2-3 μm.

[0102] Comparative Example 6

[0103] The composite fabric was prepared in the same manner as in Example 1, except that the pore size of the PTFE membrane was 20-25 μm.

[0104] Comparative Example 7

[0105] Except for the coating density of PUR hot melt adhesive A in steps S1 and S2, which is 15 / m². 2 In addition, the composite fabric was prepared in the same manner as in Example 1.

[0106] Comparative Example 8

[0107] Except for the coating density of PUR hot melt adhesive A in steps S1 and S2, which is 4 g / m³. 2 In addition, the composite fabric was prepared in the same manner as in Example 1.

[0108] Comparative Example 9

[0109] Except for steps S3 and S4, where the coating density of PUR hot melt adhesive B is 22 g / m³ 2 In addition, the composite fabric was prepared in the same manner as in Example 1.

[0110] Comparative Example 10

[0111] Except for steps S3 and S4, where the coating density of PUR hot melt adhesive B is 9 g / m³ 2 In addition, the composite fabric was prepared in the same manner as in Example 1.

[0112] Comparative Example 11

[0113] Except that the coating temperature of PUR hot melt adhesive A in steps S1 and S2 is 85°C, the composite fabric is prepared in the same manner as in Example 1.

[0114] Comparative Example 12

[0115] Except that the coating temperature of PUR hot melt adhesive A in steps S1 and S2 is 105°C, the composite fabric is prepared in the same manner as in Example 1.

[0116] Comparative Example 13

[0117] The composite fabric was prepared in the same manner as in Example 1, except that the coating speed was 38 m / min.

[0118] Comparative Example 14

[0119] The composite fabric was prepared in the same manner as in Example 1, except that the coating speed was 65 m / min.

[0120] Comparative Example 15

[0121] The composite fabric was prepared in the same manner as in Example 1, except that the cooling rate was 2°C / min.

[0122] Comparative Example 16

[0123] The composite fabric was prepared in the same manner as in Example 1, except that the cooling rate was 6°C / min.

[0124] Comparative Example 17

[0125] The composite fabric was prepared in the same manner as in Example 1, except that the relative humidity for the moisture reaction was 55% RH.

[0126] Comparative Example 18

[0127] The composite fabric was prepared in the same manner as in Example 1, except that the relative humidity for the moisture reaction was 75% RH.

[0128] Performance testing

[0129] The waterproof performance of the composite fabrics prepared in Examples 1-4 and Comparative Examples 1-18 was tested according to GB / T 4744-2013 "Test and Evaluation of Waterproof Performance of Textiles - Hydrostatic Pressure Method". The results are shown in Table 1.

[0130] The air permeability of the composite fabrics prepared in Examples 1-4 and Comparative Examples 1-18 was tested according to GB / T 5453-1997 "Determination of Air Permeability of Textile Fabrics" (sample area 20 cm²). 2 (with a pressure drop of 100 Pa), the results are shown in Table 1;

[0131] The moisture resistance of the composite fabrics prepared in Examples 1-4 and Comparative Examples 1-18 were tested according to GB / T 11048-2018 Determination of thermal and moisture resistance of textiles under steady-state conditions for physiological comfort (evaporative hot plate method), and the results are shown in Table 1.

[0132] Table 1 Test Results

[0133] As shown in Table 1, the air permeability and moisture resistance of the composite fabric in Comparative Example 1 (using a TPU film with an average pore size of 5 μm and a thickness of 5-8 μm instead of a polytetrafluoroethylene film) were not detected. However, the air permeability of the composite fabric in Example 1 was 5.9 mm / s, and the moisture resistance was 11.6 m²·Pa / W. These results indicate that this application, by selecting a polytetrafluoroethylene film or a modified polytetrafluoroethylene film with waterproof, moisture-permeable, and air-permeable properties as the film layer material, and by using adhesives to hot-melt bond the first fabric layer and the film layer, as well as the film layer and the comfort layer, avoids the technical problems of poor air permeability and poor moisture permeability caused by adhesives covering the contact surface between the film layer and adjacent layers during the bonding process. This allows the composite fabric to possess air permeability, waterproofness, and moisture permeability, thus improving the comfort of the composite fabric.

[0134] As shown in Table 1, the breathability of the composite fabric in Example 1 is significantly improved compared to Example 3 (excluding the knitted weft-knitted three-dimensional spacer fabric layer). This result indicates that the present application can improve the breathability of the composite fabric, thereby improving the comfort of the composite fabric, by using a spacer fabric layer formed by spacer fabric located between the comfort layer and the second fabric layer.

[0135] As shown in Table 1, compared with Example 4 (without hot pressing), the composite fabric of Example 1 exhibits significantly improved air permeability and significantly reduced moisture resistance. This result demonstrates that by adding a hot pressing step after the final curing process, this application can create several recesses on the surface of the composite fabric, forming moisture-permeable channels between all the recesses that facilitate the flow of heat and prevent the evaporation of sweat, thereby improving the air permeability and moisture permeability of the composite fabric.

[0136] As shown in Table 1, compared with Comparative Example 2 (which uses EVA hot melt adhesive instead of PUR hot melt adhesive), the composite fabric of Example 1 exhibits significantly improved waterproof performance and breathability, and significantly reduced moisture resistance. This result demonstrates that the use of a low-modulus, high-elasticity moisture-curing reactive polyurethane hot melt adhesive (i.e., PUR hot melt adhesive) as the adhesive in the composite process, combined with dot-matrix hot melt composite technology, can improve flexibility and comfort while ensuring adhesion between the film layer and adjacent layers. This avoids the technical problems of poor breathability and moisture permeability caused by the contact surface between the film layer and adjacent layers during the composite process, thereby improving the breathability and moisture permeability of the composite fabric.

[0137] As shown in Table 1, compared with Comparative Examples 3-6 (where the thickness and pore size of the PTFE membrane were not within the range of 5-15 μm), the composite fabric of Example 1 exhibited significantly improved air permeability and significantly reduced moisture resistance. This result demonstrates that this application, by selecting membranes with specific pore sizes and thicknesses (5-15 μm pore size and 5-15 μm thickness), sequentially heat-melt-bonds the first fabric layer, membrane layer, comfort layer, and second fabric layer along the thickness direction using adhesives. This avoids the technical problem of poor air permeability and poor moisture permeability caused by adhesives covering the contact surface between the membrane layer and adjacent layers during the bonding process, thereby further improving the air permeability and moisture permeability of the composite fabric.

[0138] As shown in Table 1, compared with Comparative Examples 7-10 (coating density not within the above-mentioned specific range), Comparative Examples 11-12 (coating temperature not within the above-mentioned specific range), and Comparative Examples 13-14 (coating speed not within the above-mentioned specific range), the composite fabric of Example 1 exhibits significantly improved waterproof performance, breathability, or significantly reduced moisture resistance. This application, by controlling parameters such as adhesive coating density, coating speed, coating thickness, and coating temperature within specific ranges, ensures bonding effectiveness while avoiding poor breathability and moisture permeability caused by adhesive covering the contact surface during the lamination process. This improves the breathability and moisture permeability of the composite fabric, thereby enabling the composite fabric to achieve a balance of waterproof, breathable, and moisture-permeable properties.

[0139] As shown in Table 1, compared with Comparative Examples 15-16 (where the cooling rate was not within the specific range mentioned above), the composite fabric of Example 1 exhibits significantly improved air permeability and significantly reduced moisture resistance. This result demonstrates that by controlling the cooling rate within a specific range, this application can prevent uneven adhesive layering or the formation of bubbles, ensuring the smoothness of the composite fabric and avoiding the adverse effects on air permeability and moisture permeability caused by bubbles or uneven adhesive layering, thereby improving the air permeability and moisture permeability of the fabric.

[0140] As shown in Table 1, compared with Comparative Examples 17-18 (where the cooling rate was not within the specific range mentioned above), the composite fabric of Example 1 exhibited significantly improved air permeability and significantly reduced moisture resistance. This result indicates that controlling the relative humidity of the moisture reaction within a specific range can ensure bonding effectiveness while avoiding the problems of poor air permeability and poor moisture permeability caused by adhesive covering the contact surfaces of each layer during the lamination process, thus improving the air permeability and moisture permeability of the composite fabric.

[0141] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A composite fabric, characterized by, The composite fabric is formed by bonding a first fabric layer, a membrane layer, a comfort layer, and a second fabric layer sequentially along the thickness direction using an adhesive. The first fabric layer and the membrane layer, as well as the membrane layer and the comfort layer, are bonded together by point-like hot-melt bonding. The membrane layer is made of polytetrafluoroethylene (PTFE) or a membrane formed from modified PTFE.

2. The composite facing material of claim 1, wherein, The material of the first fabric layer is an anti-slip fabric, knitted fabric, or brushed fabric formed from at least one of natural fibers, polyester fibers, and polyurethane fibers. And / or, the pore size of the polytetrafluoroethylene membrane or the membrane formed by modified polytetrafluoroethylene is 5-15 μm; And / or, the thickness of the film layer is 5-15 μm; And / or, the comfort layer is made of sponge, fiber felt, foam or silicone cotton; And / or, the thickness of the comfort layer is 0.1-0.3 cm; And / or, the material of the second fabric layer is a woven fabric, knitted fabric or brushed fabric formed from at least one of natural fibers and polyester fibers.

3. The composite facing material of claim 1, wherein, The adhesive located between the first fabric layer and the film layer and between the film layer and the comfort layer is selected from a first adhesive, which is selected from a moisture-curing reactive polyurethane hot melt adhesive with a viscosity of 3400-5000cps at a temperature of 90°C. and / or the areal density of the adhesive located between the first fabric layer and the membrane layer and between the membrane layer and the comfort layer is 5-10 g / m 2 ; and / or the area density of the adhesive of the adhesive region located between the comfort layer and the second fabric layer is 10-20 g / m 2 ; And / or, the thickness of the adhesive is 20-50 μm; And / or, the comfort layer is formed by a mesh-like hot-melt bonding process with the second fabric; And / or, the adhesive between the comfort layer and the second fabric is selected from a second adhesive, which is selected from a moisture-curing reactive polyurethane hot melt adhesive with a viscosity of 4500-6000 cps at a temperature of 110°C. And / or, it also includes a spacer fabric layer located between the comfort layer and the second fabric layer; And / or, the second fabric layer is provided with a plurality of recesses, all of which are interconnected.

4. The composite facing material of claim 3, wherein, The spacer fabric layer is made of at least one of natural fibers and polyester fibers. And / or, the thickness of the spacer fabric layer is 0.2-0.4 cm; And / or, the depth of the recess is 40-60 μm.

5. The composite facing material of claim 3, wherein, The spacer fabric layer and the comfort layer, as well as the spacer fabric layer and the second fabric, are all bonded together by a mesh-like hot-melt composite with the second adhesive.

6. The composite facing material of claim 3, wherein, The area density of the adhesive in the adhesive regions located between the spacer fabric layer and the comfort layer and between the spacer fabric layer and the second fabric layer is 10-20 g / m 2 .

7. The method of making a composite fabric according to any one of claims 1 to 6, wherein, The preparation method includes the following steps: The first fabric layer and the film layer are bonded together using the adhesive, then pressed, cooled, subjected to moisture reaction, and cured. The first fabric layer is then bonded together with the comfort layer, pressed, cooled, subjected to moisture reaction, and cured. The second fabric layer is then bonded together with the first fabric layer, pressed, cooled, subjected to moisture reaction, and cured to obtain the composite fabric.

8. The production method according to claim 7, wherein The adhesive is applied at a speed of 40-60 m / min; And / or, the pressing pressure is 40-60N; And / or, the cooling rate is 3-5°C / min; And / or, the relative humidity of the moisture reaction is 60%RH-70%RH; And / or, the duration of the moisture reaction is 15-45 seconds; and / or, after the last maturation curing, a hot pressing step is included to form a plurality of recesses, all of said recesses being interconnected.

9. The production method according to claim 8, wherein The hot pressing is performed at a temperature of 180-220°C, a pressure of 0.3-0.5 Mpa, and a time of 24-48h.

10. A textile, characterized in that, The textile is made of the composite fabric according to any one of claims 1-6 or made according to the method of any one of claims 7-9.

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