Windproof and rainproof breathable soft shell knitted fabric and preparation method thereof

Abstract

The invention provides a windproof and rainproof breathable soft-shell knitted fabric and a preparation method, the windproof and rainproof breathable soft-shell knitted fabric comprises a surface layer, an inner layer and a middle layer, the middle layer is located between the surface layer and the inner layer, the surface layer is a mesh air layer, the middle layer is a windproof breathable layer formed by a perforated film or a coating, the inner layer is a single-sided fleece, the fleece surface faces the surface layer, and the surface of the inner layer faces the surface layer. The surface layer, the middle layer and the inner layer are bonded together through glue to form the composite fabric. Through the composite structure design of the knitted surface layer, the functional middle layer and the knitted velvet lining layer, multiple functions of wind prevention, rain prevention, oil prevention, easy decontamination, high breathability, warm keeping, softness and the like are achieved on the single fabric in a concentrated mode.

Description

Technical Field

[0001] This invention relates to the field of textile fabrics, and more specifically, to a windproof, rainproof, breathable soft-shell knitted fabric and its preparation method. Background Technology

[0002] Traditional knitted fabrics, especially those used in sweatshirts and sweatpants, while offering good breathability, elasticity, and a soft feel due to their loose loop structure, generally suffer from poor wind and rain protection. In changeable weather conditions, these garments are typically only suitable as inner layers, requiring an additional windproof and rainproof jacket. Although "hardshell" fabrics combining densely woven fabrics with waterproof and breathable membranes exist on the market, they tend to be stiff, noisy, and uncomfortable, failing to meet consumers' demands for a "soft, fluffy, structured, and naturally draping" wearing experience in casual wear.

[0003] Therefore, developing a fabric based on a knitted structure and integrating multifunctional layers through innovative composite processes to simultaneously achieve excellent wind and rain protection, high breathability, and the unique comfortable feel of knitting has significant market value. Summary of the Invention

[0004] In view of this, the purpose of this invention is to provide a method for preparing a windproof, rainproof, and breathable softshell knitted fabric. This method successfully prepares a composite softshell fabric with balanced performance by designing a specific surface knitted structure, a fleece-like treatment for the inner layer, and selecting a functional film for the middle layer and a composite process.

[0005] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0006] A windproof, rainproof, and breathable soft-shell knitted fabric includes an outer layer, an inner layer, and a middle layer, wherein the middle layer is located between the outer layer and the inner layer. The outer layer is configured as a mesh air layer, the middle layer is a windproof and breathable layer formed by a perforated film or coating, and the inner layer is a single-sided fleece with the fleece side facing the outer layer. The outer layer, middle layer, and inner layer are bonded together with adhesive to form a composite fabric.

[0007] Furthermore, the density of the intermediate layer is 5 to 10 pores per square centimeter.

[0008] Furthermore, the surface fabric structure is a plain weave fabric structure or a textured fabric structure.

[0009] Furthermore, a windproof and breathable layer is added to the inner side and / or inner layer of the surface layer.

[0010] Furthermore, the pattern of the surface fabric is in a cycle of 18 lines.

[0011] Furthermore, the organizational structures of the first, seventh, and thirteenth routes are the same; the organizational structures of the second, fifth, eighth, eleventh, fourteenth, and seventeenth routes are the same; the organizational structures of the fourth, tenth, and sixteenth routes are the same; and the organizational structures of the sixth, ninth, fifteenth, and eighteenth routes are the same.

[0012] Furthermore, the organizational structures of the first, seventh, and thirteenth lines are all: upper needle floating thread structure, upper needle tufted loop structure, lower needle tufted loop structure, and lower needle floating thread structure.

[0013] Furthermore, the organizational structures of the second, fifth, eighth, eleventh, fourteenth, and seventeenth lines are all looped purl stitches, looped purl stitches, floating purl stitches, and floating purl stitches.

[0014] Furthermore, the organizational structures of the fourth, tenth, and sixteenth lines are: purl stitch clustered loop, purl stitch floating thread, purl stitch floating thread, and purl stitch clustered loop; while the organizational structures of the sixth, ninth, fifteenth, and eighteenth lines are: purl stitch floating thread, purl stitch floating thread, purl stitch looped loop, and purl stitch looped loop.

[0015] Furthermore, the organizational structure of the third row is, in sequence, a floating stitch, a circular stitch, and a clustered stitch; the organizational structure of the twelfth row is, in sequence, a floating stitch, a circular stitch, and a clustered stitch.

[0016] Compared with existing technologies, the windproof, rainproof, and breathable soft-shell knitted fabric of the present invention has the following advantages:

[0017] Excellent functional integration: Through the composite structure design of "knitted outer layer + functional middle layer + knitted fleece inner layer", multiple functions such as windproof, rainproof, oilproof, easy to clean, high breathability, warmth and softness are achieved on a single fabric.

[0018] Outstanding comfort: Based on knitted fabrics, especially the brushed inner layer, it retains the soft, fluffy, and skin-friendly comfort required for the garment, which contrasts sharply with traditional hard shell fabrics.

[0019] Flexible and controllable process: It offers two possible paths: thin film lamination and coating lamination, which can be selected according to cost, performance focus, and production conditions. The weaving structure, auxiliaries, and lamination parameters are all adjustable, facilitating product series development.

[0020] Wide range of applications: The fabrics produced perfectly meet the market demand for "casual appearance and outdoor performance", enabling knitted sweatshirts, sweatpants and other items to cope with sudden weather changes, expanding their wearing scenarios and seasons.

[0021] The present invention also provides a method for preparing a windproof, rainproof, and breathable soft-shell knitted fabric, which is used to prepare the windproof, rainproof, and breathable soft-shell knitted fabric described above. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the cross-sectional structure of the windproof, rainproof, breathable soft shell knitted fabric described in this invention;

[0023] Figure 2 This is a schematic diagram of the triangular arrangement of the fabric described in this invention.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Surface layer, 2-Inner layer, 3-Middle layer. Detailed Implementation

[0026] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] As shown in the figure, a windproof, rainproof, and breathable softshell knitted fabric includes an outer layer 1, an inner layer 2, and a middle layer 3, wherein the middle layer 3 is located between the outer layer 1 and the inner layer 2. The outer layer 1 is set as a mesh air layer, and the outer layer material is woven from elastic polyurethane fibers. The middle layer 3 is a windproof and breathable layer formed by a perforated film or coating. The inner layer 2 is a single-sided fleece with the fleece side facing the outer layer 1. The material of the middle layer 3 is TPU fabric, and the density of the middle layer 3 is approximately 5 to 10 holes per square centimeter. The outer layer 1, the middle layer 3, and the inner layer 2 are bonded together with adhesive to form a composite fabric.

[0028] The surface fabric can be plain weave or textured fabric. The structure of the surface fabric is varied and not limited to one type. It can be changed according to the scene and market demand.

[0029] Furthermore, a windproof and breathable layer can be added to the inner side of the surface layer and / or the inner layer by bonding a perforated film or coating, and a third layer can be bonded together so that the surface layer and the inner layer can fit together tightly, and the final fabric has both windproof and breathable properties.

[0030] Furthermore, the pattern of the surface fabric is woven in a repeat of 18 rows, and the specific structural arrangement of the surface fabric is as follows:

[0031] The structure of the first group is as follows: purl stitch, purl stitch, purl stitch, purl stitch, purl stitch; the structure of the second group is as follows: purl stitch, purl stitch, purl stitch, purl stitch; the structure of the third group is as follows: purl stitch, purl stitch, purl stitch, purl stitch; the structure of the fourth group is as follows: purl stitch, purl stitch, purl stitch, purl stitch; the structure of the fifth group is as follows: purl stitch, purl stitch... The structure of the sixth row is as follows: purl stitch, purl stitch, knit stitch, knit stitch; the structure of the seventh row is as follows: purl stitch, purl stitch, knit stitch, knit stitch; the structure of the eighth row is as follows: purl stitch, purl stitch, knit stitch, knit stitch; the structure of the ninth row is as follows: purl stitch, purl stitch, knit stitch, knit stitch; the structure of the tenth row... The stitch structure for the eleventh group is as follows: purl stitch, purl stitch, purl stitch, purl stitch, purl stitch; the twelfth group is as follows: purl stitch, purl stitch, purl stitch, purl stitch; the thirteenth group is as follows: purl stitch, purl stitch, purl stitch, purl stitch; the fourteenth group is as follows: purl stitch, purl stitch... The structure of the fifteenth group is, in order, purl stitch floating thread, purl stitch circular thread, and purl stitch circular thread; the structure of the sixteenth group is, in order, purl stitch circular thread, purl stitch floating thread, and purl stitch circular thread; the structure of the seventeenth group is, in order, purl stitch circular thread, purl stitch floating thread, and purl stitch floating thread; the structure of the eighteenth group is, in order, purl stitch floating thread, purl stitch circular thread, and purl stitch circular thread.

[0032] As part of the embodiments of the present invention, a method for preparing a windproof, rainproof, and breathable soft-shell knitted fabric is also provided, specifically including the following process:

[0033] Step S1: Weaving and pretreatment of the surface fabric

[0034] Yarn preparation: Three types of yarn are selected: 40-60S cotton yarn, 30-50D polyester yarn, and 20-40D spandex yarn.

[0035] Weaving: Knitted on a double-sided circular knitting machine. A mesh air layer structure is used. For specific details on the triangular arrangement and needle arrangement, please refer to [reference needed]. Figure 2The triangular arrangement is designed to create a stable air layer structure and the desired texture. This structure gives the fabric good crispness and a certain degree of bulkiness, while its mesh structure lays the foundation for breathability later on.

[0036] The woven surface fabric is then scouring and pre-setting. Optionally, if a lighter base color is required, hydrogen peroxide bleaching can be used.

[0037] Pre-setting: Heat setting is performed at 160-180℃ with the coil width stretched for 20-40 seconds to stabilize the coil structure and reduce deformation during subsequent processing.

[0038] The pre-designed surface fabric is dyed, softened, and functionally treated.

[0039] Softening treatment: To compensate for the hardening of the hand feel that may be caused by composite and functional finishing, the surface fabric before functional finishing is softened by impregnating it with a hydrophilic silicone softener to make the fabric soft.

[0040] Functional finishing: The surface fabric is impregnated with a soft functional finishing agent, which forms a water- and oil-repellent film on the surface of the fabric fibers, giving the surface fabric waterproof, oil-proof and easy-to-clean properties; the finishing agent is a fluorine-free, durable, soft waterproof agent, which can achieve waterproof, oil-proof and easy-to-clean functions while taking into account the hand feel, so that it can also have a soft hand feel after lamination, which is in stark contrast to traditional hard shell fabrics.

[0041] Step S2: Weaving and napping of the inner fabric

[0042] Yarn preparation and weaving: Select 100% polyester or polyester-cotton blended yarn as the ground yarn and polyester low-elasticity yarn as the terry yarn, and weave a single-sided terry structure on a single-sided circular knitting machine.

[0043] Pile raising: The terry cloth is first subjected to conventional scouring and relaxation treatment.

[0044] A multi-stage steel wire raising machine is used for raising the nap. The raising roller speed, fabric tension, and number of stages are adjusted to ensure that the loop yarn is evenly broken and combed into a dense, soft, short-pile surface free of long hairs. The pile height is controlled between 1.5-2.0 mm. A shearing process is then performed to make the pile surface smooth and even.

[0045] Finally, the fleece undergoes a tumbling process, where it is tumbled in a high-temperature hot air oven to cause the fibers to intertwine, forming a fluffy, full fleece fabric that is not prone to shedding.

[0046] Step S3: Preparation of intermediate functional membrane

[0047] A microporous polyurethane (TPU) breathable membrane is selected as the intermediate functional layer, or a coated membrane is selected as the intermediate layer. The thickness of the intermediate layer is 0.01~0.05mm. The microporous polyurethane breathable membrane needs to be laser-drilled to form a uniform micropore array with a pore size of 5-10 micrometers and a pore density of approximately 5-10 pores per square centimeter. The coating slurry needs to be uniformly mixed with water-based polyurethane resin (breathable type), ammonium bicarbonate, nonionic surfactant, polyurethane associative thickener, carbodiimide water-based crosslinking agent, and deionized water to form a slurry.

[0048] Step S4: Composite Process

[0049] This invention employs a "sandwich" dot-bonded composite process to balance peel strength and breathability.

[0050] If the intermediate layer uses a microporous polyurethane breathable membrane:

[0051] The selected waterborne polyurethane (PU) adhesive has a solid content of 40% and exhibits excellent adhesion, water resistance, and flexibility.

[0052] Lay the inner single-sided fleece fabric obtained in step S2 flat, with the fleece side facing down (i.e., the side that bonds with the film is the fabric base). Apply the adhesive to the fabric base of the inner layer fabric in a dotted pattern using rotary screen printing or spraying, with an adhesive application amount of approximately 10~25g / m².

[0053] Lay the perforated TPU film prepared in step S3 flat onto the inner fabric coated with adhesive.

[0054] The material is fed into the first laminating machine for hot-press lamination, which allows the adhesive to initially cure and temporarily fixes the intermediate layer and the inner layer.

[0055] Lay the pre-treated surface fabric obtained in step S1 flat. Apply water-based PU adhesive to the outer surface of the TPU film using a dotted application method, with an adhesive application rate of approximately 10-25 g / m². Align and bond the TPU film with the inner layer to the surface fabric, then send it to the second laminating machine for final hot-press lamination to ensure a strong bond between the three layers.

[0056] If the intermediate layer is a coating functional layer:

[0057] The coating is a water-based polyurethane resin (breathable type) slurry with a solid content of about 40% and a particle size of 5~15μm.

[0058] Lay the inner or outer layer fabric prepared by S1 or S2 flat with the back side facing up. Using a doctor blade coating method, apply the coating slurry prepared by S3 onto the inner or outer layer fabric, with a wet coating thickness of approximately 0.04-0.08 mm. Immediately cover the wet coating with another layer of fabric, forming a sandwich structure of "outer layer-wet coating-inner layer". Place the mixture in an oven for segmented drying and curing, causing the micropore-forming agent to decompose and escape, leaving interconnected micropores in the PU film layer. Simultaneously, the resin fully cross-links and cures, firmly bonding the three layers together.

[0059] Final shaping: The final shaping is carried out on the width shaping machine.

[0060] Example 1

[0061] Step S1: Weaving and pretreatment of the surface fabric

[0062] Yarn preparation: Three yarn specifications are selected: 50S cotton yarn, 40D polyester yarn, and 40D spandex yarn.

[0063] Weaving: Knitted on a double-sided circular knitting machine. A mesh air layer structure is used. For specific details on the triangular arrangement and needle arrangement, please refer to [reference needed]. Figure 2 The triangular arrangement is designed to create a stable air layer structure and the desired texture. This structure gives the fabric good crispness and a certain degree of bulkiness, while its mesh structure lays the foundation for breathability later on.

[0064] Fabric pretreatment: The woven surface fabric is treated as follows:

[0065] Scouring: Treat in a solution containing scouring agent (2 g / L) and soda ash (1 g / L) at 90°C for 30 minutes to remove spinning oil and wax.

[0066] Alternatively, if a lighter base color is required, a hydrogen peroxide bleaching process can be used.

[0067] Pre-setting: Heat setting is performed at 160℃ with the coil width stretched for 30 seconds to stabilize the coil structure and reduce deformation during subsequent processing.

[0068] The surface fabric of the pre-designed pattern is dyed.

[0069] Softening treatment: To compensate for the hardening of the hand feel that may be caused by the composite and waterproofing treatment, the surface fabric before waterproofing treatment is softened by impregnating it with a hydrophilic silicone softener, with a working solution concentration of 20g / L, a roll-on rate of 65%, and baking at 150℃ for 60 seconds.

[0070] Functional finishing: Impregnate the surface fabric with a functional finishing agent (e.g., a fluorine-free durable waterproofing agent) at a working solution concentration of 60 g / L and a pick-up rate of 70%. Then bake at 160°C for 90 seconds to allow the finishing agent to form a water- and oil-repellent film on the surface of the surface fabric fibers.

[0071] Step S2: Weaving and napping of the inner fabric

[0072] Yarn preparation: Use 100% polyester (T) or polyester-cotton blended 32-count yarn as the ground yarn, and 150D polyester low elastic yarn as the terry yarn.

[0073] Weaving: Weaving a single-sided terry weave on a single-sided circular knitting machine.

[0074] napped / fluffed:

[0075] The terry cloth is first subjected to conventional scouring and relaxation treatment.

[0076] A multi-stage steel wire raising machine is used for raising the nap. The raising roller speed, fabric tension, and number of stages are adjusted to ensure that the loop yarn is evenly broken and combed into a dense, soft, short-pile surface without long hairs. The pile height is controlled between 1.5-2.0mm.

[0077] The wool is sheared to make the pile surface smooth and even.

[0078] Finally, the fabric undergoes a fleece treatment, where it is tumbled in a high-temperature hot air oven to entangle the fibers, creating a fluffy, full, and non-shedding fleece fabric. The pre-setting temperature is controlled at 150℃ for 25 seconds.

[0079] Step S3: Preparation of intermediate functional membrane

[0080] A microporous polyurethane (TPU) breathable membrane was selected as the intermediate functional layer. The film thickness was 0.015 mm.

[0081] The TPU film is laser-drilled to create a uniform array of micropores. The pore size is 5-10 micrometers, and the pore density is approximately 5-10 pores per square centimeter. These micropores are much smaller than water droplets, effectively blocking liquid water penetration while allowing water vapor molecules to pass through freely.

[0082] Step S4: Composite Process

[0083] This embodiment employs a "sandwich" dot-matrix bonding composite process to balance peel strength and breathability.

[0084] Adhesive preparation: Select water-based polyurethane (PU) adhesive with a solid content of 40%, which has excellent adhesion, water resistance and flexibility.

[0085] First composite layer (membrane and inner layer):

[0086] Lay the inner fleece fabric obtained in step S2 flat with the fleece side facing down (i.e., the side that is bonded to the membrane is the fabric base).

[0087] The adhesive is applied to the backing of the inner fabric in a dotted pattern using rotary screen printing or spraying, with an application rate of approximately 15 g / m².

[0088] Lay the perforated TPU film prepared in step S3 flat onto the inner fabric coated with adhesive.

[0089] The film is fed into the first laminating machine and hot-pressed at 115°C and 0.4 MPa at a speed of 15 m / min. This allows the adhesive to initially cure, temporarily fixing the film to the inner layer.

[0090] Second composite layer (with surface layer):

[0091] Lay the surface fabric obtained and pretreated in step S1 flat.

[0092] Similarly, water-based PU adhesive is applied to the outer surface of the TPU film in a dotted manner, with an adhesive application amount of approximately 12g / m².

[0093] Align and bond the TPU film with the inner layer (film side up) to the outer fabric.

[0094] The material is fed into a second laminating machine, where it undergoes final hot-press lamination at 125°C and 0.5 MPa pressure, with a machine speed of 12 meters per minute. This ensures a strong bond between the three layers of material.

[0095] Example 2

[0096] The main difference between this embodiment and Embodiment 1 lies in the way the windproof and breathable layer is implemented, with a coating method used instead of a separate perforated membrane.

[0097] Steps S1 and S2 are the same as in Example 1, respectively preparing the surface fabric and the inner napped fabric.

[0098] Step S3: Preparation of coating slurry

[0099] A slurry is formed by mixing 100 parts by weight of waterborne polyurethane resin (breathable type) with a solid content of about 40%, 30 parts by weight of ammonium bicarbonate with a particle size of 5~15μm, 1.0 part by weight of nonionic surfactant, 2.0 parts by weight of polyurethane associative thickener, 2.0 parts by weight of carbodiimide waterborne crosslinking agent, and 10~20 parts by weight of deionized water.

[0100] Step S3: One-step coating and lamination process

[0101] Lay the inner fabric flat with the bottom side facing up. Using a scraper coating method, evenly apply the above-mentioned paste to the inner fabric, with a wet coating thickness of approximately 0.08 mm. Immediately cover the outer fabric with the wet coating, forming a sandwich structure of "outer layer-wet coating-inner layer".

[0102] The film is then sent to the drying room for segmented drying and curing: First, it is pre-dried at 100℃ for 2 minutes to partially evaporate the moisture and form a preliminary film. Then, it is baked at 140℃ for 3 minutes to decompose and release the micropore forming agent, leaving interconnected micropores in the PU film layer. At the same time, the resin is completely cross-linked and cured, firmly bonding the three layers together.

[0103] Performance testing

[0104] The air permeability of the fabrics obtained in Examples 1 and 2 was tested according to the test method of national standard GB / T 5453-1997 to characterize their windproof performance; the moisture permeability of the fabrics obtained in Examples 1 and 2 was tested according to the test method of national standard GB / T 12704.1-2009.

[0105] Air permeability (mm / s) <![CDATA[Water vapor transmission rate (g / (m 2 ·24h))]]> Water resistance rating (level) Test Standards GB / T 5453-1997 GB / T 12704.1-2009 GB / T 4745-2012 Example 1 14 3300 Level 4 Example 2 15 2800 Level 4

[0106] This fabric exhibits excellent windproof, water-repellent, and waterproof properties. Maintaining the softness, fluffiness, and structured yet naturally draping characteristics required for sweatshirt knit fabrics, sweatshirts and sweatpants made from this material are windproof and light rainproof. For autumn and winter, it offers superior warmth and protection, adapting to more lifestyle scenarios and providing young people with a more convenient, casual, stylish, and functional way to dress. It meets the market demand for fabrics that combine leisure and outdoor needs, and its development will satisfy the needs of casual and athletic individuals for multifunctional clothing fabrics when facing sudden weather changes.

[0107] While the present invention has been disclosed above, it is not limited thereto. Any person skilled in the art can make various modifications and alterations without departing from the spirit and scope of the invention; therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

Claims

1. A windproof, rainproof, breathable soft-shell knitted fabric, characterized in that, It includes an outer layer (1), an inner layer (2) and a middle layer (3), wherein the middle layer (3) is located between the outer layer (1) and the inner layer (2), the outer layer (1) is a mesh air layer, the middle layer (3) is a windproof and breathable layer formed by a perforated film or coating, the inner layer (2) is a single-sided fleece with the fleece side facing the outer layer (1), and the outer layer (1), the middle layer (3) and the inner layer (2) are bonded together with glue to form a composite fabric.

2. The windproof, rainproof, breathable soft-shell knitted fabric according to claim 1, characterized in that, The density of the intermediate layer (3) is 5 to 10 pores per square centimeter.

3. The windproof, rainproof, breathable soft-shell knitted fabric according to claim 1, characterized in that, The surface layer (1) fabric structure is a plain weave fabric structure or a textured fabric structure.

4. The windproof, rainproof, breathable soft-shell knitted fabric according to claim 1, characterized in that, An additional windproof and breathable layer is added to the inner side of the surface layer (1) and / or the inner layer (2).

5. The windproof, rainproof, breathable soft-shell knitted fabric according to claim 1, characterized in that, The pattern of the outer layer (1) fabric is in a cycle of 18 lines.

6. The windproof, rainproof, breathable soft-shell knitted fabric according to claim 5, characterized in that, The organizational structures of Routes 1, 7, and 13 are the same; The organizational structures of Routes 2, 5, 8, 11, 14, and 17 are the same; The organizational structures of the Fourth, Tenth, and Sixteenth Routes are the same; The organizational structures of Routes 6, 9, 15, and 18 are the same.

7. The windproof, rainproof, breathable soft-shell knitted fabric according to claim 5 or 6, characterized in that, The organizational structures of the first, seventh, and thirteenth lines are all: purl needle floating thread, purl needle tufted loop, purl needle tufted loop, and purl needle floating thread. The organizational structures of the second, fifth, eighth, eleventh, fourteenth, and seventeenth lines are all: purl needle loop, purl needle loop, purl needle floating thread, and purl needle floating thread.

8. The windproof, rainproof, breathable soft-shell knitted fabric according to claim 5 or 6, characterized in that, The weaving structures for the fourth, tenth, and sixteenth lines are: purl loop weaving, purl floating thread weaving, purl floating thread weaving, and purl loop weaving. The weaving structures for the sixth, ninth, fifteenth, and eighteenth lines are: purl floating thread weaving, purl floating thread weaving, purl loop weaving, and purl loop weaving. The weaving structure for the third line is: purl floating thread weaving, purl floating thread weaving, purl loop weaving, and purl loop weaving. The weaving structure for the twelfth line is: purl floating thread weaving, purl floating thread weaving, purl loop weaving, and purl loop weaving.

9. A method for preparing a windproof, rainproof, breathable soft-shell knitted fabric, characterized in that, The method for preparing the windproof, rainproof, breathable softshell knitted fabric according to any one of claims 1 to 8 comprises the following steps: Weaving and pretreatment of the outer fabric: Three types of yarn are selected: 40-60S cotton yarn, 30-50D polyester yarn, and 20-40D spandex yarn. The yarn is woven on a double-sided circular knitting machine. The woven outer fabric is then scouring, pre-setting, and dyeing. Weaving and napping of the inner fabric: Polyester or polyester-cotton blended yarn is selected as the ground yarn, and polyester low elastic yarn is selected as the loop yarn. The single loop structure is woven on a single circular knitting machine. The loop fabric is first subjected to conventional scouring and relaxation treatment, and then raised using a multi-wire napping machine. The pile height is controlled at 1.5-2.0mm. The inner fabric is then dyed. Softening and functional finishing of the surface fabric: Impregnation with a hydrophilic silicone softener gives the fabric a soft hand feel before functional finishing; then impregnation of the softened fabric with a softening functional finishing agent causes the finishing agent to form a water- and oil-repellent film on the surface of the surface fabric fibers, giving the surface fabric waterproof, oil-proof and easy-to-clean functions, while also taking into account the hand feel. Preparation of the intermediate functional layer: Microporous polyurethane breathable membrane or coating is selected as the intermediate functional layer. For microporous polyurethane breathable membrane, laser perforation is required to form a uniform micropore array with a pore size of 5-10 micrometers and a pore density of approximately 5-10 pores per square centimeter. For coating functional layer, a doctor blade coating method is used to uniformly coat the composite surface of the inner or outer fabric with a mixture of water-based polyurethane resin and adhesive to ultimately form a windproof and breathable functional layer. Lamination Process: If the intermediate layer uses a microporous polyurethane breathable membrane, the prepared inner or outer fabric needs to be laid flat. Adhesive is applied in dots to the lamination surface of the inner or outer fabric using rotary screen printing or spraying. The prepared perforated TPU film is then laid flat on the adhesive-coated inner or outer fabric and fed into a laminating machine for hot-pressing lamination. This allows the adhesive to initially cure, fixing the intermediate layer to the outer layer. The other layer of fabric, which has been prepared and pretreated, is then laid flat on the outside of the TPU film. The surface is coated with adhesive, and the TPU film with the composite inner or outer layer is aligned and bonded to another layer of fabric. It is then fed into a laminating machine for final hot-pressing to ensure a strong bond between the three layers. If the middle layer is a coated functional layer, the inner or outer fabric is laid flat with the back side facing up. A scraper coating method is used to evenly coat the mixed slurry containing water-based polyurethane resin and adhesive onto the inner or outer fabric. Immediately, another layer of fabric is placed over the wet coating to form a sandwich structure of "outer layer-wet coating-inner layer".

10. The method for preparing the windproof, rainproof, breathable soft-shell knitted fabric according to claim 9, characterized in that, The adhesive is a water-based polyurethane adhesive.

Images