Fabric with one hydrophilic side and one waterproof side

Abstract

The utility model discloses a fabric with a hydrophilic single face and a waterproof single face. The fabric comprises a weft plain stitch structure composed of an outer layer and an inner layer. A waterproof agent printing layer is arranged on the surface of the outer layer; the weft plain stitch structure is formed by weaving cotton covered with polyester; the outer layer is a cotton yarn woven layer, the inner layer is a polyester yarn woven layer, cotton yarns and polyester yarns are compounded in a cotton covering polyester mode, the proportion of the cotton yarns on the outer layer is 70%-75%, and the proportion of the polyester yarns on the inner layer is 25%-30%. According to the weft plain stitch structure, through differentiated coil density design, large pores are formed in the outer layer to promote permeation of a surface waterproof agent, and the capillary effect is enhanced through the inner layer compact structure; 2, cotton and polyester are blended according to a specific proportion, so that the moisture absorption rate of the outer layer is ensured (the moisture absorption rate reaches 0.8 ml / cm < 2 >. S when the cotton component is greater than or equal to 70%), and the dimensional stability is maintained through the polyester component;

Description

TECHNICAL FIELD

[0001] The application relates to the field of fabrics, in particular to a single-side hydrophilic and single-side waterproof fabric. BACKGROUND

[0002] The current single-side hydrophilic and single-side waterproof fabric is mainly applied to the fields of sportswear and outdoor clothing, but the existing technology has the problem of balancing hydrophilicity and waterproofness. When a high-hydrophilic material is used for the inner layer of the fabric, although sweat can be quickly absorbed, water can easily penetrate to the outer layer to form obvious sweat stains. On the contrary, if a thick and heavy waterproof treatment is used for the outer layer, the moisture absorption effect of the inner layer is inhibited and the wearing comfort is reduced.

[0003] In the traditional process, a double-layer fabric composite structure is usually used, but the thickness is increased and the air permeability is reduced. Some single-layer structures are treated by a post-finishing coating, but the coating is prone to cracking, resulting in insufficient durability, and the finishing process significantly affects the moisture absorption performance of the hydrophilic layer. In the existing weaving structure, the blending of hydrophobic fibers and hydrophilic fibers can easily lead to chaotic capillary effect, and the moisture cannot be directed and transferred, so it is difficult to achieve the effect of one-way moisture management.

[0004] Therefore, there is an urgent need for a fabric that can realize moisture absorption of the inner layer and sweat stain prevention of the outer layer through structure optimization. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at overcoming the defects of the prior art, and provides a single-side hydrophilic and single-side waterproof fabric. The fabric can realize moisture absorption of the inner layer and sweat stain prevention of the outer layer.

[0006] In order to achieve the above-mentioned purpose, the application adopts the following technical scheme:

[0007] A single-side hydrophilic and single-side waterproof fabric comprises a weft plain stitch structure composed of an outer layer and an inner layer. The outer surface of the outer layer is provided with a waterproof agent printing layer. The weft plain stitch structure is formed by cotton-covered polyester weaving. The outer layer is a cotton yarn weaving layer, and the inner layer is a polyester yarn weaving layer. The cotton yarn and the polyester yarn are compounded by the cotton-covered polyester method. The proportion of the outer layer cotton yarn is 70%-75%, and the proportion of the inner layer polyester yarn is 25%-30%.

[0008] Preferably, in the weft plain stitch structure, the longitudinal density of the outer layer loop is 75-80 loops / 5 cm, the horizontal density is 60-65 stitches / 5 cm, the longitudinal density of the inner layer loop is 85-90 loops / 5 cm, and the horizontal density is 70-75 stitches / 5 cm.

[0009] Preferably, in the weft plain stitch structure, the reverse side loop forms a smooth hydrophilic surface, and the front side loop forms a water-locking structure. The density ratio of the front side loop to the reverse side loop is 1:0.8-0.9.

[0010] Preferably, the waterproof agent printing layer is a mixture of 8%-12% of a fluorine-free waterproof agent, 0.8%-1.2% of a crosslinking agent, 1%-1.6% of a thickening agent and the balance of water.

[0011] Preferably, the waterproof agent printing layer forms a micro-dot pattern with a spacing of 0.5-1.2mm and a coverage of 45-60%; and the waterproof agent printing layer is shaped by baking at 145-155℃.

[0012] Preferably, the waterproof agent printing layer has a thickness of 0.005mm-0.03mm and is distributed on the surface of the outer layer.

[0013] Preferably, the weaving density of the polyester yarn in the inner layer is 1.2-1.5 times that of the cotton yarn in the outer layer, and the inner layer and the outer layer have a gradient porosity structure, and the porosity of the inner layer is less than that of the outer layer.

[0014] Preferably, the cotton yarn is 40S combed cotton with a length of 13.5CM / 50G; and the polyester yarn is 50D / 72F drawn textured yarn with a length of 12.5CM / 50G.

[0015] Preferably, the fabric has a grammage of 165g / m2.

[0016] Preferably, the fabric has an effective width of 167CM.

[0017] In summary, the utility model has the following beneficial technical effects:

[0018] 1. The weft flat needle structure is designed by differential loop density, the outer layer forms larger pores to promote the penetration of the surface waterproof agent, and the inner layer has a tight structure to enhance the capillary effect.

[0019] 2. The specific proportion of cotton and polyester blending ensures the moisture absorption rate of the outer layer (when the cotton component is greater than or equal to 70%, the moisture absorption rate is 0.8ml / cm 2 ·s), and the polyester component maintains dimensional stability. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the weaving diagram of the utility model.

[0021] Figure 2 is the loop structure diagram of the cotton yarn covering the polyester yarn.

[0022] Marked: 1 cotton yarn; 2, polyester yarn. DETAILED DESCRIPTION

[0023] The orientation terms mentioned or possibly mentioned in the present specification, such as up, down, left, right, front, back, front side, back side, top, bottom, etc., are defined with respect to the structure shown in the drawings, and they are relative concepts, so they can change accordingly according to different positions and different use states. Therefore, these or other orientation terms should not be interpreted as restrictive terms. In addition, the terms "first", "second", "third" or similar expressions are only used for description and differentiation purposes, and cannot be understood as indicating or implying the relative importance of the corresponding components.

[0024] The following will be described in detail in combination with the accompanying drawings. Figure 1 - the accompanying drawings Figure 2 The present application will be further described in detail.

[0025] The present application discloses a single-sided hydrophilic and single-sided waterproof fabric.

[0026] A single-sided hydrophilic and single-sided waterproof fabric, comprising a weft plain stitch structure composed of an outer layer and an inner layer; the outer layer is provided with a waterproof agent printed layer on the surface; the weft plain stitch structure is formed by cotton cover polyester weaving; the weft plain stitch structure is a single-sided weaving structure. The characteristic is that all loops are formed in the same direction. The outer layer is a cotton yarn weaving layer, and the inner layer is a polyester yarn weaving layer. Cotton yarn 1 and polyester yarn 2 are compounded by cotton cover polyester, and the cotton cover polyester weaving process can form a gradient density structure.

[0027] The proportion of the outer layer cotton yarn 1 is 70%-75%, preferably 75%, and the proportion of the inner layer polyester yarn 2 is 25%-30%, preferably 25%.

[0028] The cotton yarn 1 is 40S combed cotton, and the length of the thread is 13.5CM / 50G; the polyester yarn 2 is 50D / 72F drawn textured yarn, and the length of the thread is 12.5CM / 50G.

[0029] The weft plain stitch structure formed by cotton cover polyester weaving can distribute the fiber function in a certain direction. The accurate control of the cotton / polyester ratio can not only meet the one-way moisture transfer demand (when the inner layer absorbs moisture, the outer layer waterproof agent and the tight polyester layer can block the back seepage), but also maintain the air permeability of the fabric. The difference in loop structure of the front and back of the weft plain stitch further enhances the one-way moisture transfer effect.

[0030] 40S combed cotton (13.5CM / 50G thread length) creates a high specific surface area fiber bundle (18-25% higher than conventional cotton yarn), which increases the liquid absorption amount per unit time; 50D / 72F polyester (12.5CM / 50G thread length) forms a 0.8μm-1.2μm dense yarn gap, which can block the penetration of liquid droplets below 0.6mm in diameter together with the waterproof agent.

[0031] In the weft-knitting structure, the outer layer has a longitudinal density of 75-80 loops / 5cm and a transverse density of 60-65 stitches / 5cm, while the inner layer has a longitudinal density of 85-90 loops / 5cm and a transverse density of 70-75 stitches / 5cm.

[0032] The outer layer, with its lower longitudinal density (75-80 stitches / 5cm) and transverse density (60-65 stitches / 5cm), forms a smooth surface structure, improving sweat absorption. The inner layer, with its higher longitudinal density (85-90 stitches / 5cm) and transverse density (70-75 stitches / 5cm), forms a dense mesh layer, increasing the resistance to liquid water penetration. This differentiated density design between the inner and outer layers makes it difficult for sweat, once captured by the outer layer, to penetrate the inner layer's waterproof barrier.

[0033] In the weft-knitted fabric structure, the reverse coil forms a smooth hydrophilic surface, and the coil forms a water-locking structure. The density ratio of the front and reverse coils is 1:0.8-0.9.

[0034] The smooth, hydrophilic surface of the reverse coil reduces the interfacial energy of the liquid by decreasing fiber entanglement, promoting rapid spread and adsorption of sweat (contact angle reduced by 23-30%); the water-locking structure on the front compresses the pores through high-density coils, forming an impermeable layer with a hydraulic resistance of ≥5kPa, which can effectively resist backflow caused by capillary diffusion of sweat.

[0035] The waterproofing agent printing layer is a mixture of 8%-12% fluorine-free waterproofing agent, preferably 10% in this application; 0.8%-1.2% crosslinking agent, preferably 1% in this application; 1.3% thickener and the balance being water.

[0036] The fluorine-free waterproofing agent avoids environmental pollution, while a 10% concentration, combined with a crosslinking agent, constructs a nanoscale hydrophobic film (contact angle ≥130°) on the fiber surface without clogging the internal pores of the cotton fibers (maintaining a moisture permeability ≥5000g / m²). 2 •24h). The thickener enables the printing paste to form a coherent microscopic water-repellent network rather than a completely sealed coating, thus balancing waterproofness and breathability.

[0037] The waterproofing agent printing layer forms a micro-dot pattern with an interval of 0.5-1.2mm and a coverage of 45-60%; the waterproofing agent printing layer is baked and set at 145-155℃.

[0038] The 0.5-1.2mm micro-matrix spacing creates a gradient surface tension field (Δγ≥15mN / m) between the waterproof and non-waterproof areas, guiding sweat to diffuse directionally along the non-printed areas. A 45-60% coverage rate creates a "hydrophobic island + hydrophilic channel" composite structure, preventing outer droplet penetration (hydrostatic pressure ≥8kPa) while retaining over 55% of the effective moisture-absorbing area. Baking at 1450-155℃ causes the waterproofing agent to form covalent bonds with the hydroxyl groups of the cotton fibers, improving wash resistance (waterproofing retention rate >85% after 20 washes).

[0039] The thickness of the waterproofing agent printing layer is 0.005mm-0.03mm, and it is distributed on the outer surface.

[0040] An ultra-thin waterproof layer of 0.005mm-0.03mm ensures that the capillaries between fibers are not completely sealed (porosity retention >70%), achieving an anti-siphon effect (water absorption height difference ≥4cm) while maintaining a water vapor transfer rate loss of <15%. Precise thickness control avoids fiber hardening problems caused by traditional coatings (flexural modulus increase ≤8%).

[0041] The inner polyester yarn 2 has a weaving density that is 1.2-1.5 times that of the outer cotton yarn 1. The inner and outer layers have a gradient pore structure, with the porosity of the inner layer being less than that of the outer layer.

[0042] The inner layer has a density 1.2-1.5 times that of the outer layer, forming a pore size gradient (outer layer pore size 8-12μm → inner layer 5-7μm), generating a Laplace pressure difference (ΔP≥200Pa), which forces sweat to move unidirectionally from the macroporous hydrophilic layer to the microporous hydrophobic layer; the gradient pores also reduce the critical pressure threshold for liquid penetration (breakthrough pressure >12kPa), avoiding sweat stains caused by reverse wetting.

[0043] The fabric weighs 165 grams per square meter.

[0044] 165g / m 2 Optimizing yarn packing density by weight improves the fabric's moisture permeability (>6000g / m²). 2 The balance between 24h resistance and impermeability (hydrostatic pressure resistance > 10000Pa) is achieved, compared to conventional sports fabrics (120-180g / m²). 2 (This technology improves waterproofing efficiency by more than 30% for the same weight.)

[0045] The effective width of the fabric is 167 cm.

[0046] The 167CM effective width is suitable for economical fabric layout in garment cutting (increasing material utilization by 5-8%), eliminating the risk of water seepage at splicing lines caused by the width limitation of traditional waterproof fabrics, while ensuring the consistency of functional structure performance in the fabric width direction (lateral waterproof difference rate <3%).

[0047] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application; therefore, according to the technical scheme of the present application, a person skilled in the art can propose a plurality of structure modes and implementation modes which can be replaced with each other without changing the essential spirit of the present application. Therefore, the above specific embodiments and drawings are only exemplary descriptions of the technical scheme of the present application, and should not be regarded as the whole or regarded as the limitation or restriction of the technical scheme of the present application. Therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A fabric that is hydrophilic on one side and waterproof on the other, characterized in that: It includes a plain weft knit structure consisting of an outer layer and an inner layer; the outer layer surface is provided with a waterproofing agent printing layer; the plain weft knit structure is formed by cotton-over-polyester knitting; the outer layer is a cotton yarn knitting layer, the inner layer is a polyester yarn knitting layer, the cotton yarn (1) and the polyester yarn (2) are combined by cotton-over-polyester method, wherein the proportion of cotton yarn (1) in the outer layer is 70%-75%, and the proportion of polyester yarn (2) in the inner layer is 25%-30%; in the plain weft knit structure, the longitudinal density of the outer layer loop is 75-80 loops / 5cm, the transverse density is 60-65 stitches / 5cm, the longitudinal density of the inner layer loop is 85-90 loops / 5cm, and the transverse density is 70-75 stitches / 5cm; in the plain weft knit structure, the reverse loop forms a smooth hydrophilic surface, the front loop forms a water-locking structure, and the density ratio of the front and reverse loops is 1:0.8-0.

9.

2. The fabric as described in claim 1, characterized in that: The waterproofing agent printing layer forms a micro-dot matrix pattern with an interval of 0.5-1.2mm and a coverage rate of 45-60%; the waterproofing agent printing layer is baked and set at 145-155℃.

3. The fabric as described in claim 1, characterized in that: The thickness of the waterproofing agent printing layer is 0.005mm-0.03mm, and it is distributed on the outer surface.

4. The fabric as described in claim 1, characterized in that: The inner layer polyester yarn (2) has a weaving density that is 1.2-1.5 times that of the outer layer cotton yarn (1). The inner and outer layers have a gradient pore structure, and the porosity of the inner layer is less than that of the outer layer.

5. The fabric as described in claim 1, characterized in that: The cotton yarn (1) is 40S combed cotton with a length of 13.5CM / 50G; the polyester yarn (2) is 50D / 72F stretch textured yarn with a length of 12.5CM / 50G.

6. The fabric as described in claim 1, characterized in that: The fabric weighs 165 grams per square meter.

7. The fabric as described in claim 1, characterized in that: The effective width of the fabric is 167 cm.

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