Smooth and high-elastic waterproof fabric

Abstract

The utility model provides a smooth and high-elastic waterproof fabric. The smooth and high-elastic waterproof fabric comprises a water-repellent smooth layer, a plain weave fabric layer, an adhesive layer and a waterproof and moisture-permeable polyurethane film layer which are sequentially compounded, the water-repellent smooth layer is an organic silica film layer; the plain weave fabric layer is of an organization structure formed by interweaving warp yarn and weft yarn in a one-up and one-down mode, the warp yarn and the weft yarn are elastic polyester composite yarn, and the elastic polyester composite yarn is formed by conducting parallel composite spinning on first polyester yarn and second polyester yarn. The first polyester yarn and the second polyester yarn are respectively 20-25D / 24F polyester fully drawn yarns, and the shrinkage rates of the first polyester yarn and the second polyester yarn are different. The waterproof fabric has elasticity similar to that of spandex, the elasticity is stable, the risk of'white exposure 'of conventional spandex fabric is overcome, and the waterproof fabric is waterproof, moisture permeable and good in surface hand feeling smoothness.

Description

Technical Field

[0001] The present application relates to the technical field of functional yarn fabrics, and in particular to a smooth, highly elastic and waterproof fabric. Background Art

[0002] At present, outdoor sports are popular, and waterproof jackets are becoming more and more common in outdoor sports. Elastic waterproof jacket fabrics are becoming more and more popular among consumers because of their large elastic elongation and elastic recovery, which can guarantee consumers' comfort and freedom to the greatest extent. Among them, spandex stretch waterproof jackets have been more popular in the market. However, due to the influence of factors such as spandex's easy aging and difficulty in shaping, the elasticity of spandex is often unstable.

[0003] In order to improve the elasticity and durability of waterproof fabrics, a Chinese patent document with announcement number CN 204773922 U discloses a highly safe waterproof elastic fabric, which includes a fabric body, the surface of the fabric body is covered with a polyurethane film, the surface of the polyurethane film is covered with moisture wicking fibers, the surface of the moisture wicking fibers is provided with air holes, the surface of the moisture wicking fibers is covered with a waterproof layer, the waterproof layer is a polytetrafluoroethylene layer, the surface of the waterproof layer is covered with a polyurethane coating layer, and the polyurethane coating layer is a fluoromonomer water-based polyurethane; the fabric body is made of fabric, the fabric is a warp knitted fabric, the padding pattern is 1-0 / 2-3, the veil is made of 75D / 36T400 polyester fiber fully stretched silk filament, the bottom yarn is made of FDY84D / 36F polyester filament, the T400 polyester fiber fully stretched silk filament is hollow, and the cross-section is cross-shaped.

[0004] The warp knitted fabric has certain elasticity and waterproofness, and the elasticity is relatively long-lasting, but its elasticity and smooth surface feel need to be further improved. Utility Model Content

[0005] In view of this, the present application provides a smooth, highly elastic waterproof fabric. The waterproof fabric provided by the present application is waterproof and has good smoothness and resilience.

[0006] The present application provides a smooth, highly elastic waterproof fabric, comprising a water-repellent and smooth layer, a plain fabric layer, an adhesive layer and a waterproof and breathable polyurethane film layer which are laminated in sequence;

[0007] The water-repellent and smooth layer is a silicone film layer; the plain fabric layer has a tissue structure formed by warp yarns and weft yarns interwoven one above and one below, the warp yarns and weft yarns are both elastic polyester composite yarns, and the elastic polyester composite yarns are formed by parallel composite spinning of a first polyester yarn and a second polyester yarn, the first polyester yarn and the second polyester yarn are respectively 20-25D / 24F polyester fully stretched yarns, and the first polyester yarn and the second polyester yarn have different shrinkage rates.

[0008] Preferably, the first polyester yarn is a PET yarn with a shrinkage rate of 45-48%, and the second polyester yarn is a PET yarn with a shrinkage rate of 52-55%.

[0009] Preferably, the warp yarns and weft yarns are twisted elastic polyester composite yarns, and the twisting method is S twist.

[0010] Preferably, the twisting degree of the twisting is 800-1000 twists.

[0011] Preferably, the density ratio of the warp yarn to the weft yarn is 170-185T / 150-160T.

[0012] Preferably, the water-repellent and slippery layer is a bio-based organic silicon oxide film layer.

[0013] Preferably, the average thickness of the adhesive layer is 0.01-0.02 μm, and the gram weight is 7-10 g / m 2 .

[0014] Preferably, the average thickness of the waterproof and moisture-permeable polyurethane film layer is 0.015-0.018 mm.

[0015] Compared with the prior art, the waterproof fabric provided by the present application is mainly composed of a four-layer structure from top to bottom: the first layer is a water-repellent and smooth layer, which is an organic silicon oxide film layer; the second layer is a plain weave fabric layer, the warp and weft yarns are elastic polyester composite yarns, the elastic polyester composite yarn is formed by the parallel composite spinning of the first polyester yarn and the second polyester yarn, the first polyester yarn and the second polyester yarn are respectively polyester fully stretched yarns with different shrinkage rates and 20-25D / 24F; the third layer is an adhesive layer, and the fourth layer is a waterproof and breathable polyurethane film layer, the main function of the adhesive layer is to bond the second layer and the fourth layer together. The waterproof fabric described in the present application has elasticity similar to spandex, and the elasticity is stable, which overcomes the risk of "whitening" of conventional spandex fabrics, and it is also waterproof and breathable, and the surface feels smooth. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic diagram of the cross-sectional structure of the waterproof fabric provided in an embodiment of the present application;

[0017] Figure 2 This is a schematic diagram of the structure of the elastic polyester composite yarn of the plain fabric layer in the embodiment of the present application. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0020] The present application provides a smooth, highly elastic waterproof fabric, comprising a water-repellent and smooth layer, a plain fabric layer, an adhesive layer and a waterproof and breathable polyurethane film layer which are laminated in sequence;

[0021] The water-repellent and smooth layer is a silicone film layer; the plain fabric layer has a tissue structure formed by warp yarns and weft yarns interwoven one above and one below, the warp yarns and weft yarns are both elastic polyester composite yarns, and the elastic polyester composite yarns are formed by parallel composite spinning of a first polyester yarn and a second polyester yarn, the first polyester yarn and the second polyester yarn are respectively 20-25D / 24F polyester fully stretched yarns, and the first polyester yarn and the second polyester yarn have different shrinkage rates.

[0022] The waterproof fabric provided by the present application is waterproof and has good smoothness and resilience, which is convenient for application.

[0023] See also Figure 1 , Figure 1 The schematic diagram of the cross-sectional structure of the waterproof fabric provided in the embodiment of the present application is shown in FIG. 1 is a water-repellent and smooth layer, 2 is a plain fabric layer, 3 is an adhesive layer, and 4 is a waterproof and breathable polyurethane film layer.

[0024] The waterproof fabric described in the embodiment of the present application includes a water-repellent and smooth layer 1 and a plain fabric layer 2, wherein the plain fabric layer 2 is the main body of the fabric, and the water-repellent and smooth layer 1 is generally arranged on the upper surface of the plain fabric layer 2. Preferably, the water-repellent and smooth layer is a bio-based organic silicon oxygen film layer, the main component of which is a silicon oxygen organic compound, which realizes the functions of surface water repellency and slipperiness. The water-repellent and smooth layer 1 is mainly formed by polyaliphatic compounds rich in silicon, which is used to reduce the surface tension of the fabric so that its tension is less than the tension of water, thereby playing a water-repellent role; and because silicon has the property of reducing the friction coefficient, when the human body touches it, it feels smooth. In addition, it can be linked to the main body of the fabric through an isocyanate resin or a melamine resin bridge. In the embodiment of the present application, the water-repellent and smooth layer 1 is a bio-based water-repellent and smooth film extracted and formed from castor plants, banana peels and other peels, and can be made of Rudolf's BIO CGR bio-based water repellent formation.

[0025] In the embodiment of the present application, the plain fabric layer 2 is formed by interlacing warp yarns and weft yarns according to an up-and-down weave pattern. The warp yarns and weft yarns are both elastic polyester composite yarns, which have good elasticity and are obtained by parallel composite spinning of two first polyester yarns and second polyester yarns with different shrinkage rates. Polyester is a general term for polymers obtained by polycondensation of polyols and polyacids. Polyester fibers usually refer to polyethylene terephthalate (PET) fibers, commonly known as polyester. The elastic polyester composite yarn structure is as follows: Figure 2 As shown, it is generally a circular cross-section, and the black and white colors represent the first polyester yarn and the second polyester yarn in parallel composite. The shrinkage rate is mainly the percentage of the change in yarn length under boiling water heating conditions, and the formula is: shrinkage rate = (original length of yarn - length after boiling water) / original length of yarn * 100%; specifically, the first polyester yarn is a PET yarn with a shrinkage rate of 45%-48%, and the second polyester yarn is a PET yarn with a shrinkage rate of 52%-55%; when subjected to high-temperature treatment such as dyeing, due to the inconsistent shrinkage rates of the two fibers, permanent curling will be generated, making the fabric elastic.

[0026] In addition, the first polyester yarn and the second polyester yarn are 20-25D / 24F polyester fully drawn yarn (FDY); the FDY type fiber is selected here, in addition to making the fabric smooth, when it shrinks, the surface of the fabric is smoother, and the smoothness of the fabric is further improved. The stretched and deformed yarn generally uses pre-oriented yarn as raw material, and is a relatively low-elastic filament made by a one-step stretching and deformation method. According to the different degrees of fiber stretching, it can be divided into drawn yarn (DY) and fully drawn yarn (FDY). The fully drawn yarn has relatively stable quality, less hairy yarn and broken ends. In addition, most of the unstretched and deformed yarns cannot be used directly. According to the spinning speed, they are generally divided into: undrawn yarn (UDY), semi-oriented yarn (MOY), pre-oriented yarn (POY), and highly oriented yarn (HOY). The specifications of the first polyester yarn can be 20D / 24F-25D / 24F, and the specifications of the second polyester yarn can be 20D / 24F-25D / 24F. The fiber fineness of filaments is usually expressed by a fixed length system. For example, a filament of 9,000 meters long and weighing 1 gram is 1 denier (D for short). Denier (also known as "denier") is a unit of measure for fabrics and yarns. It refers to the weight of 9,000 meters (9 kilometers) of filaments / thread at the standard moisture regain. 24F is a yarn composed of 24 filaments, and F is the number of holes in the spinneret.

[0027] In order to make the fabric surface smoother, the yarn form of the first polyester yarn and the second polyester yarn is selected to be FDY. Since the FDY form is smooth, its friction is small, which helps to improve the smoothness of the fabric; while DTY (stretched textured yarn) and ATY (air textured yarn) are relatively rough and will increase the resistance of the fabric surface.

[0028] In order to ensure the elasticity and smooth and elastic feel of the fabric, the warp yarn and the weft yarn are twisted elastic polyester composite yarns, and the twisting method is S twist. Furthermore, the twist of the twist is 800-1000 twists. The twist should not be too large or too small. If it is too large, the fabric will feel hard, and the feel and elasticity will be poor. If the twist is too small, the fabric will feel loose and have no texture. The twist is the number of twists of a specified length before the yarn is untwisted. The yarn rotates 360 degrees around its axis to form one twist. S twist means that the inclination direction of the fibers in the yarn is consistent with the middle of the letter S, and it is a twisted yarn in the right-hand direction or clockwise direction.

[0029] In an embodiment of the present application, the density ratio of the warp yarn and the weft yarn is 170-185T / 150-160T, that is, the warp yarn density * weft yarn density is (170T-185T) * (150T-160T); its structural ratio design ensures the maximum yarn recovery space, ensures the elasticity of the fabric, and improves the feel and texture of the fabric.

[0030] On the lower surface of the plain fabric layer 2, the embodiment of the present application uses an adhesive layer 3 to bond a composite waterproof and breathable polyurethane film layer 4 to form the waterproof fabric structure. Preferably, the adhesive layer 3 is mainly a polymethylurethane layer, which facilitates the firm bonding of the plain fabric layer 2 and the waterproof and breathable polyurethane film layer 4. The average thickness of the adhesive layer 3 can be 0.01μm-0.02μm; the preferred mesh number of the polymethylurethane component can be 120 mesh-140 mesh, and the gram weight of this layer is generally 7g / m 2 -10 g / m 2 Within this range, the waterproof fabric not only has good bonding performance, but also has good smooth and elastic feel and elasticity.

[0031] The waterproof and breathable polyurethane film layer 4 is mainly composed of polyurethane, which is generally a continuous non-porous hydrophilic film, and the film mainly plays the role of waterproof and breathable. Specifically, the average thickness of the waterproof and breathable polyurethane film layer is 0.015mm-0.018mm.

[0032] The present application embodiment provides a method for preparing the smooth and highly elastic waterproof fabric as described above, comprising the following steps:

[0033] According to the structure of plain weave, select the corresponding yarn to weave into plain weave fabric;

[0034] A water-repellent and smooth layer is coated on one surface of the plain fabric, and an adhesive is coated on the other surface and then covered with a waterproof and breathable polyurethane film to obtain the smooth and highly elastic waterproof fabric.

[0035] The organizational structure, yarn characteristics and selection are consistent with those described above; the plain fabric formed can also be bleached and / or dyed, and there is no special limitation in this application, such as using a polyester high-temperature overflow dyeing process. The embodiment of this application can be coated to form a bio-based water-repellent and smooth film to obtain a water-repellent and smooth layer; the adhesive and waterproof and breathable polyurethane film are also as described above.

[0036] The width of the waterproof fabric product obtained in the embodiment of the present application is not limited, and the weight can be 115-130g / m 2 The waterproof fabric has good waterproofness and resilience, stable elasticity, smooth and elastic feel, and is suitable for use as outdoor clothing.

[0037] The present application is further described in detail below in conjunction with the accompanying drawings and actual examples. The examples described here are only to help understand the present application, but are not intended to be limiting of the present application. Among them, the raw materials involved in the examples of the present application are commercially available.

[0038] Example 1

[0039] This embodiment provides a smooth and elastic waterproof fabric, the structure of which is as follows: Figure 1 As shown, it includes a water-repellent and smooth layer 1, a plain fabric layer 2, an adhesive layer 3 and a waterproof and breathable polyurethane film layer 4; the water-repellent and smooth layer 1 is arranged on the upper surface of the plain fabric layer 2, the lower surface of the plain fabric layer 2 is the adhesive layer 3, and under the adhesive layer 3 is the waterproof and breathable polyurethane film layer 4.

[0040] The water-repellent and slippery layer 1 is a bio-based water-repellent and slippery film, the main component of which is an organic silicon-oxygen compound.

[0041] The plain fabric layer 2 is white, wherein A yarn is the warp yarn and B yarn is the weft yarn. Both are PET yarns with different shrinkage rates. The boiling water shrinkage rate of A yarn is 45%, and the boiling water shrinkage rate of B yarn is 52%. Due to the different shrinkage rates of A yarn and B yarn, permanent curling will occur when subjected to high temperature, thereby producing relatively stable elasticity. The deniers of A yarn and B yarn are both 20D / 24F; the two yarn forms are both selected as FDY. The A yarn and B yarn are also twisted, and the twisting method is S twisting with a twist of 800 twists. The twist should not be less than 800 twists, otherwise the fabric will feel loose and have no texture. Twisting can improve the compactness of the fabric, improve the flatness of the fabric, reduce the friction of the fabric surface, and improve the smoothness of the fabric. In addition, the warp density and weft density are 170T*150T respectively, and the density should not be too small, otherwise there will be seams such as cracks.

[0042] The adhesive layer 3 is coated on the lower surface of the plain fabric layer 2 to form a waterproof and breathable polyurethane film layer 4 that is covered and integrated into the fabric. The thickness of the adhesive layer 3 is 0.01 μm-0.02 μm, the mesh number is 120-140, and the gram weight is about 7-8 g / m 2 The waterproof and breathable polyurethane film layer mainly has the function of waterproof and breathable, and has a thickness of 0.015 mm.

[0043] In summary, through the above-mentioned product design, the utility model can make the product have a smooth and chewy feel and good elasticity compared to conventional products.

[0044] The following is a specific comparison result of the product performance test. It can be seen that compared with conventional products, the product of the utility model not only has a smoother surface, but also has better resilience and elongation.

[0045] Table 1 Comparison of smooth feel performance of waterproof fabric samples described in Example 1

[0046]

[0047]

[0048] Note: The test method is to lay the fabric samples flat on a slope with an angle of 30° / 45° (the slope angle is 30 degrees and 45 degrees), and the length of the slope is 45 cm. 200g of solid soap in different states is placed on the top of the conventional fabric 1 and the fabric sample of this embodiment, and allowed to slide freely from the test surface, and the time to slide to the bottom is recorded. The test is performed three times, and the test surface is the first layer (water-repellent and slippery layer).

[0049] Conventional fabric 1 is a polyester mechanical stretch fabric with a plain weave structure, using a single yarn, a specification of 50D / 72FDTY (untwisted), and a shrinkage rate between 20% and 25%; fabric density: warp density 130T-150T, weft density 115T-130T.

[0050] Table 2 Comparison of elasticity and other properties of the waterproof fabric samples described in Example 1

[0051]

[0052]

[0053] Example 2

[0054] The structure of the waterproof fabric is the same as that of Example 1; wherein the water-repellent and smooth layer 1 is a bio-based water-repellent and smooth film, the main component of which is an organic silicon oxide compound.

[0055] In the plain fabric layer 2, A yarn is the warp yarn and B yarn is the weft yarn. Both are PET yarns with different shrinkage rates. The boiling water shrinkage rate of A yarn is 47%, and the boiling water shrinkage rate of B yarn is 53%. Due to the different shrinkage rates of A yarn and B yarn, permanent curling will occur when subjected to high temperature, thereby producing relatively stable elasticity. The denier numbers of A yarn and B yarn are both 25D / 24F; the two yarn forms are both selected as FDY. The A yarn and B yarn are also twisted, and the twisting method is S twisting, and the twist is 1000 twists. The twist should not be greater than 1000 twists, otherwise the fabric will feel hard and have poor elasticity. Twisting can improve the compactness of the fabric, improve the flatness of the fabric, reduce the friction of the fabric surface, and improve the smoothness of the fabric. In addition, the warp density and the weft density are 185T*160T respectively. The density should not be too large, otherwise the fiber will not have enough shrinkage space, which will affect the elastic properties of the fabric.

[0056] The adhesive layer 3 is coated on the lower surface of the plain fabric layer 2, so that the waterproof and breathable polyurethane film layer 4 is combined with the fabric. The thickness of the adhesive layer 3 is 0.01 μm-0.02 μm, the mesh number is 120 mesh-140 mesh, and the gram weight is about 9-10 g / m 2 The waterproof and breathable polyurethane film layer mainly has the function of waterproof and breathable, and has a thickness of 0.015 mm.

[0057] In summary, through the above-mentioned product design, the utility model can make the product have a smooth and chewy feel and good elasticity compared to conventional products.

[0058] The following is a specific comparison result of the product performance test (the test method is the same as that of Example 1). It can be seen that compared with conventional products, the product of the utility model not only has a smoother surface, but also has better resilience and elongation.

[0059] Table 3 Comparison of smooth feel performance of waterproof fabric samples described in Example 2

[0060]

[0061] Table 4 Comparison of elasticity and other properties of waterproof fabric samples described in Example 2

[0062]

[0063]

[0064] It can be seen from the above embodiments that the waterproof fabric described in the present application has elasticity similar to that of spandex, and has stable elasticity (elastic recovery rate can be 75%-80%, elastic elongation can be 15%-20%), overcoming the risk of "whitening" of conventional spandex fabrics, and is also waterproof and breathable (such as water resistance 3000-5000mm H2O, moisture permeability 3000-5000g / m 2 / day), the surface feels smoother.

[0065] The above description is only a preferred embodiment of the present application, and does not limit the implementation mode and protection scope of the present application. For those skilled in the art, it should be aware that any solution obtained by equivalent substitution and obvious changes made using the description and illustrations of the present application should be included in the protection scope of the present application.

Claims

1. A smooth, highly elastic waterproof fabric, characterized in that: It includes a water-repellent and smooth layer, a plain fabric layer, an adhesive layer and a waterproof and breathable polyurethane film layer which are compounded in sequence; The water-repellent and smooth layer is a silicone film layer; the plain fabric layer has a tissue structure formed by warp yarns and weft yarns interwoven one above and one below, the warp yarns and weft yarns are both elastic polyester composite yarns, and the elastic polyester composite yarns are formed by parallel composite spinning of a first polyester yarn and a second polyester yarn, the first polyester yarn and the second polyester yarn are respectively 20-25D / 24F polyester fully stretched yarns, and the first polyester yarn and the second polyester yarn have different shrinkage rates.

2. The waterproof fabric according to claim 1, characterized in that: The first polyester yarn is a PET yarn with a shrinkage rate of 45-48%, and the second polyester yarn is a PET yarn with a shrinkage rate of 52-55%.

3. The waterproof fabric according to claim 1, characterized in that: The warp yarns and weft yarns are twisted elastic polyester composite yarns, and the twisting method is S twist.

4. The waterproof fabric according to claim 3, characterized in that: The twisting degree of the twisting is 800-1000 twists.

5. The waterproof fabric according to any one of claims 1 to 4, characterized in that: The density ratio of the warp yarn to the weft yarn is 170-185T / 150-160T.

6. The waterproof fabric according to any one of claims 1 to 4, characterized in that: The water-repellent and slippery layer is a bio-based organic silicon oxide film layer.

7. The waterproof fabric according to any one of claims 1 to 4, characterized in that: The average thickness of the adhesive layer is 0.01-0.02 μm, and the gram weight is 7-10 g / m 2 .

8. The waterproof fabric according to any one of claims 1 to 4, characterized in that: The average thickness of the waterproof and moisture-permeable polyurethane film layer is 0.015-0.018 mm.

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