Method for preparing moisture-absorbing and breathable fabric

Abstract

The invention discloses a method for preparing a moisture-absorbing and breathable fabric. The method firstly spreads a functional adhesive material on a positioning film to form a functional adhesive layer, then obtains a functional adhesive layer with a set shape by laser engraving, retains the functional adhesive layer with the set shape on the positioning film, removes the remaining functional adhesive layers, and completes waste discharge. After that, the functional adhesive layer and the positioning film are hot-pressed and compounded on the fabric base layer to form a composite body. On the basis of the composite body, a slit is cut on the fabric base layer by laser, and the slit is in a non-closed curve shape and penetrates the fabric base layer along the thickness direction of the fabric base layer, thereby forming a corresponding movable page on the fabric base layer. After the cutting is completed, the positioning film is removed to obtain a moisture-absorbing and breathable fabric. On the moisture-absorbing and breathable fabric obtained by the present invention, the functional adhesive layer has a uniform thickness, a clear outline, a flat adhesive surface, no mutual adhesion, a good appearance, and a high position accuracy, and there are fewer situations such as slit position offset and slit shape deviation.

Description

Technical Field

[0001] The invention relates to the technical field of clothing, and in particular to a method for preparing a moisture-absorbing and breathable fabric. Background Art

[0002] Breathability is one of the important indicators to measure the comfort and functionality of sportswear. During strenuous exercise, the human body will produce a lot of sweat and heat. If the sportswear does not have good breathability, the sweat cannot be discharged in time, which will cause the humidity in the clothes to increase, making the wearer feel stuffy and uncomfortable, and even affecting sports performance. Sportswear with good breathability can effectively regulate body temperature and avoid excessive sweating that causes the body temperature to drop too quickly, thereby protecting the health of athletes.

[0003] As shown in the invention patent with application publication number CN118120992A, it discloses an intelligent drag-reducing breathable fabric, which includes a base layer and a printing layer arranged on the back of the base layer. The back of the base layer is used to contact the skin. The printing layer is distributed in the form of multiple dot prints on the back of the base layer. One side of the dot print is angled or curved. A slit is arranged at the junction edge of the dot print with the angled or curved side and the base layer. The dot print has the property of hygroscopic expansion. When the back of the base layer is wet, the dot print absorbs moisture and expands, driving the corresponding base layer to curl inward and lift outward along the slit to form a drag-reducing structure. Through this drag-reducing structure, it can not only intelligently absorb moisture and open for ventilation during exercise and sweating, but also intelligently reduce drag, with a drag reduction efficiency of up to 30%.

[0004] Also disclosed is a method for preparing an intelligent drag-reducing breathable fabric, which is used to prepare the above-mentioned intelligent drag-reducing breathable fabric. The method uses screen printing to print printing adhesive to form dot printing, which is suitable for liquid printing adhesive. The adhesive force of liquid printing adhesive is relatively weak, and it is difficult to form a drag-reducing structure on a relatively thick and hard base layer.

[0005] During the printing process, the liquid printing adhesive may flow and diffuse, resulting in unclear edges and deviations in the edge shape of the printed layer. It is also easy to penetrate into the fiber gaps of the base layer, affecting the lifting effect of the base layer and the appearance of the fabric. In addition, due to the fluidity of the printing adhesive, if the gaps between the dot printing distribution are small, the dot printings are easy to stick together during printing. If the gaps between the dot printing distribution are large, the printing layer will have insufficient adhesive strength, and the drag reduction structure will not be able to open for ventilation after moisture absorption. In addition, the base layer without printing adhesive between the dot printings is prone to being squeezed and wrinkled, resulting in a poor appearance of the drag reduction structure.

[0006] In addition, this method requires multiple continuous cycle printing, and multiple positioning is required during printing, which affects the shape and position accuracy of the final printed layer.

[0007] After the adhesive is cured, a slit needs to be processed at the edge where the dot print and the base layer meet. However, if the base layer of the fabric is thin or soft, the base layer may be easily affected during the slit processing, causing it to deform, affecting the cutting accuracy, and easily causing the slit position to shift, the slit shape to deviate, and the quality of the finished product. Summary of the invention

[0008] The object of the present invention is to provide a method for preparing a moisture-absorbing and breathable fabric. The prepared fabric has high cutting accuracy, uniform thickness of the functional adhesive layer and clear edges.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0010] A method for preparing a moisture-absorbing and breathable fabric comprises the following steps:

[0011] S1. Prepare the positioning film and the functional rubber, and lay the functional rubber on the positioning film;

[0012] S2. The functional rubber material is arranged and leveled, and the functional rubber material is cured to form a functional rubber layer;

[0013] S3. The functional adhesive layer is engraved into a set shape by laser, and the functional adhesive layer having a set shape is retained on the positioning film, and the remaining functional adhesive layer is removed by laser;

[0014] S4. The functional adhesive layer having a set shape is hot-pressed together with the positioning film on the fabric base to form a composite body, so that the functional adhesive layer is transferred to the fabric base, wherein the positioning film and the fabric base are located on both sides of the functional adhesive layer, and the fabric base and the functional adhesive layer have different hygroscopic expansion rates;

[0015] S5. Cutting a slit on the fabric base layer by laser, wherein the slit is in a non-closed curve shape and penetrates the fabric base layer along the thickness direction of the fabric base layer, thereby forming an active page on the fabric base layer, and the position of the slit is adjacent to the position of the functional adhesive layer;

[0016] S6. removing the positioning film to obtain a moisture-absorbing and breathable fabric.

[0017] Furthermore, step S1 also includes: heating the solid functional adhesive material to a set temperature to melt the functional adhesive material into a liquid state, and then spreading the liquid functional adhesive material onto the positioning film.

[0018] Furthermore, the set temperature is 90-120°C.

[0019] Furthermore, in step S2: the functional rubber material is flattened by a scraper or a rubber coating roller, the rubber coating roller comprises a central section and a limiting section, the limiting sections are located at both ends of the central section, and the diameter of the limiting sections is greater than the diameter of the central section.

[0020] Furthermore, the functional adhesive is a hydrophilic polyurethane hot melt adhesive.

[0021] Furthermore, in step S4, the temperature of the hot pressing composite is 140-150° C., and the duration of the hot pressing composite is 10-15 seconds.

[0022] Furthermore, the thickness of the functional adhesive layer is 0.13-0.17 mm; the thickness of the positioning film is 0.03-0.15 mm.

[0023] Furthermore, the movable page has a movable edge and a fixed edge connected to each other, the shape of the movable edge is adapted to the shape of the cut, the fixed edge is the connecting edge between the movable page and the fabric base layer, and the functional adhesive layer with a set shape includes a first strip-shaped portion, and the length direction of the first strip-shaped portion intersects with the length direction of the fixed edge.

[0024] Furthermore, the functional adhesive layer having a set shape further includes a second strip-shaped portion, and the second strip-shaped portion is arranged along the movable edge and / or the fixed edge.

[0025] Furthermore, the functional adhesive layer includes more than two first strip-shaped portions, the first strip-shaped portions are arranged at intervals and have the same length direction, and the second strip-shaped portions connect the first strip-shaped portions to each other.

[0026] The present invention has the following beneficial effects:

[0027] 1. In the present invention, a functional adhesive is coated on a positioning film and solidified to form a functional adhesive layer. The functional adhesive layer is cut into a set shape by laser and then transferred to the fabric base layer by hot pressing and compounding. No multiple positioning is required during the entire molding and transfer process. The functional adhesive layer for controlling the opening and closing of the movable leaf on the finally obtained moisture-absorbing and breathable fabric has a uniform thickness, a clear outline, a flat adhesive surface, and no mutual adhesion. It has a good appearance and high position accuracy.

[0028] 2. The present invention removes / burns the functional adhesive layer outside the set shape through laser, and the laser discharges waste without manual removal, which greatly reduces the production cost.

[0029] 3. The present invention utilizes a positioning film to transfer the functional adhesive layer. When cutting and slitting, the positioning film can also assist the fabric base layer to maintain flatness, thereby avoiding the fabric base layer being pulled during cutting and causing its deformation, affecting the cutting accuracy, thereby reducing the occurrence of slit position offset, slit shape deviation, etc. Under the action of the positioning film, this method is suitable for the preparation of moisture-absorbing and breathable fabrics with a small fabric base thickness and hardness, and has a wide range of applications.

[0030] 4. The present invention uses laser cutting to form a functional adhesive layer with a set shape. The functional adhesive layer retained after cutting includes a first strip-shaped portion. The first strip-shaped portion can be used to concentrate the adhesive force in the length direction of the first strip-shaped portion, weakening the adhesive force in other directions, thereby controlling the direction of the expansion force of the functional adhesive layer after absorbing moisture, thereby achieving the purpose of controlling the lifting direction of the movable leaf, which is beneficial to improving the curling window opening effect and appearance effect of the movable leaf after the fabric absorbs moisture.

[0031] 5. The present invention adopts a hydrophilic polyurethane hot melt adhesive which is solid at room temperature and liquid after melting as the functional adhesive. After the hot melt adhesive is solidified into a film, it can be directly bonded to the fabric base layer by hot pressing without the need for additional hot melt adhesive bonding. The functional adhesive layer can also absorb water and expand, so that the movable leaf can be rolled up for ventilation and air permeability. Compared with liquid adhesive, the hot melt adhesive has a stronger adhesive force and is not easy to penetrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of the structure of the complex of the present invention (I).

[0033] Figure 2 This is a schematic diagram of the structure of the moisture-absorbing and breathable fabric of the present invention (I).

[0034] Figure 3 It is a schematic diagram of the decomposition structure of the moisture-absorbing and breathable fabric of the present invention.

[0035] Figure 4 This is a schematic diagram of the structure of the moisture-absorbing and breathable fabric of the present invention (II).

[0036] Figure 5 for Figure 4 Schematic diagram of the AA section structure.

[0037] Figure 6 It is a schematic diagram of the structure of the glue coating roller of the present invention.

[0038] Figure 7 Schematic diagram of the connection structure between the fabric base layer and the functional adhesive layer of the present invention (I).

[0039] Figure 8 This is a schematic diagram of the connection structure between the fabric base layer and the functional adhesive layer of the present invention (II).

[0040] Fig. 9 Schematic diagram of the connection structure between the fabric base layer and the functional adhesive layer of the present invention (III).

[0041] Fig.10 Schematic diagram of the connection structure between the fabric base layer and the functional adhesive layer of the present invention (IV).

[0042] Explanation of the main component symbols: 1. Positioning film; 2. Functional adhesive layer; 3. Fabric base layer; 4. Cutting seam; 5. Movable leaf; 6. Gluing roller; 7. Center section; 8. Limiting section; 9. Gluing area; 10. Movable edge; 11. Fixed edge; 12. First strip portion; 13. Second strip portion. DETAILED DESCRIPTION

[0043] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods.

[0044] The present invention discloses a method for preparing a moisture-absorbing and breathable fabric. The method pre-prepare a functional adhesive layer 2 with a set shape, and then transfer the functional adhesive layer 2 with a set shape to a fabric base layer 3 to form a Figure 1 The composite is cut to form a through slit 4, and then the positioning film 1 for auxiliary transfer and cutting is removed to obtain the composite. Figure 2-5 The moisture-absorbing and breathable fabric shown is as follows:

[0045] S1. Prepare a positioning film 1 and a functional adhesive, and spread the functional adhesive on the positioning film 1.

[0046] The positioning film 1 has a thickness of about 0.03 to 0.15 mm, that is, about 3 to 15 filaments, which can provide isolation and protection and is easy to peel off.

[0047] In this embodiment, the functional adhesive material selected is PUR hot melt adhesive with a melting point of 90°C (hydrophilic moisture-curing reactive polyurethane hot melt adhesive, such as PUR286 polyurethane hot melt adhesive sold by Xiamen Keyi New Materials Co., Ltd.). The PUR hot melt adhesive is solid at room temperature, becomes liquid after heating, has fluidity, and can be coated. After coating, it reacts with moisture in the air to cure into a film; the film reacts very sensitively to water vapor, expands rapidly when encountering water vapor, and can return to its original state after drying, and has excellent adhesion and toughness (elasticity).

[0048] Compared with liquid adhesive, the functional adhesive has stronger adhesive force, which is beneficial to broaden the selection of fabric base layer 3, and the molecular structure is relatively stable, so it is not easy to penetrate when transferred to the fabric base layer 3. For the hot melt adhesive, it is necessary to preheat it before spreading it, heat the functional adhesive to a set temperature, melt the solid functional adhesive into a liquid, and then transfer and spread the liquid functional adhesive onto the positioning film 1. The set temperature during heating is 90-120°C.

[0049] S2. The functional rubber material is leveled, for example, by scraping or pressing, and the functional rubber material is cooled by natural cooling, active cooling, etc., so that the functional rubber material absorbs moisture in the air and solidifies to form a functional rubber layer 2. The functional rubber material can be leveled or pressed by a scraper or a rubber coating roller 6. Compared with leveling by a scraper, rolling and pressing by a rubber coating roller 6 is more convenient for controlling the thickness of the functional rubber layer 2.

[0050] like Figure 6 As shown, the glue roller 6 includes a central section 7 and a limiting section 8. The limiting section 8 is arranged at both ends of the central section 7, and the diameter of the limiting section 8 is larger than the diameter of the central section 7, so that a glue pressing area 9 is formed between the outer wall surface of the central section 7 and the side wall surface of the limiting section 8. As the glue roller 6 rolls, the functional adhesive material can be flattened through the glue pressing area 9, so that the functional adhesive layer 2 after curing is flat and has uniform thickness. According to the preparation requirements, the glue roller 6 with different diameter differences between the central section 7 and the limiting section 8 can be selected to obtain functional adhesive layers 2 of different thicknesses.

[0051] In this embodiment, the thickness of the functional adhesive layer 2 is 0.13-0.17 mm, i.e., about 13-17 filaments, preferably 15 filaments, so as to take into account the breathability of the fabric and the wearing comfort after the garment is made, reduce the foreign body feeling when wearing, and pass the washing test and is not easy to fall off after washing.

[0052] S3. The functional adhesive layer 2 is engraved into a set shape by laser, and the functional adhesive layer 2 with the set shape is retained on the positioning film 1, and the rest of the functional adhesive layer 2 is removed by laser burning. Since the functional adhesive layer 2 is first solidified and then engraved, the functional adhesive layer 2 with the set shape finally obtained has a clear outline and a flat adhesive surface, and the functional adhesive layers 2 are not adhered to each other.

[0053] S4. The functional adhesive layer 2 having a set shape is hot-pressed together with the positioning film 1 on the fabric base layer 3 to form a Figure 1 The composite body shown in the figure transfers the functional adhesive layer 2 onto the fabric base layer 3. In the composite body, the positioning film 1 and the fabric base layer 3 are located on both sides of the functional adhesive layer 2, and the fabric base layer 3 and the functional adhesive layer 2 have different hygroscopic expansion rates. The temperature of the hot pressing composite is 140-150°C, preferably 145°C, and the duration of the hot pressing composite is 10-15 seconds, preferably 10 seconds.

[0054] S5. A slit 4 is cut on the fabric base layer 3 by means of a laser cutting complex. The slit 4 is in a non-closed curve shape and penetrates the fabric base layer 3 in the thickness direction of the fabric base layer 3 , thereby forming an active page 5 on the fabric base layer 3 .

[0055] The position of the slit 4 is adjacent to the position of the functional adhesive layer 2. The functional adhesive layer 2 can be arranged on the movable leaf 5 on one side of the slit 4, or on the other side of the slit 4, or on both sides of the slit 4. If the functional adhesive layer 2 is arranged on one side, only one layer of the fabric base layer 3 is cut when the slit 4 is cut, or only two layers of the fabric base layer 3 and the positioning film 1 are cut. If the functional adhesive layer 2 is arranged on both sides of the slit 4, the functional adhesive layer 2 may also need to be cut when the slit 4 is cut.

[0056] The positioning film 1 can help the fabric base layer 3 to maintain flatness during cutting, avoid deformation of the fabric base layer 3 caused by cutting, and affect cutting accuracy, thereby reducing the occurrence of the position offset and shape deviation of the slit 4, and obtaining a moisture-absorbing and breathable fabric with better quality. Under the action of the positioning film 1, this method is not only suitable for the preparation of moisture-absorbing and breathable fabrics with thicker and harder fabric base layers 3, but also suitable for the preparation of moisture-absorbing and breathable fabrics with thinner, softer, and more easily deformed fabric base layers 3, and has a wide range of applications.

[0057] S6. Since the active leaf 5 is formed based on the slits 4 in a non-closed curve shape, after each slit 4 is cut, the positioning film 1 can be completely torn off at one time regardless of whether the positioning film 1 is cut. After the positioning film 1 is torn off and removed, the moisture-absorbing and breathable fabric can be obtained.

[0058] In the obtained moisture-absorbent and breathable fabric, due to the difference in moisture absorption expansion rate between the fabric base layer 3 and the functional adhesive layer 2, after moisture absorption, the functional adhesive layer 2 absorbs moisture and expands, which can drive the slit 4 to open, increase the contact area between the skin and the outside air, and achieve the purpose of moisture absorption, ventilation and air permeability. In this embodiment, the functional adhesive layer 2 with a set shape is mainly arranged on the movable page 5, and after moisture absorption, it can drive the movable page 5 to lift up and open the slit 4 for ventilation and air permeability.

[0059] like Figure 7-10 As shown, the movable page 5 has a movable edge 10 and a fixed edge 11 connected to each other. The shape of the movable edge 10 is adapted to the shape of the slit 4, and the fixed edge 11 is the connecting edge between the movable page 5 and the fabric base 3. The functional adhesive layer 2 with a set shape includes a first strip portion 12, and the length direction of the first strip portion 12 intersects with the direction of the fixed edge 11 of the movable page connection line or is even perpendicular to each other. Through the first strip portion 12, the adhesive force of the functional adhesive layer 2 on the fabric can be concentrated in the length direction of the first strip portion 12, weakening the adhesive force in other directions, thereby controlling the movable page 5 to be lifted as much as possible along the length direction of the first strip portion 12, so as to achieve the purpose of controlling the lifting direction of the movable page 5, which is conducive to improving the appearance effect of the moisture-absorbing and breathable fabric.

[0060] In addition to the first strip-shaped portion 12, the functional adhesive layer 2 having a set shape further includes a second strip-shaped portion 13, which is arranged along the movable edge 10 and / or the fixed edge 11 of the movable leaf 5. The second strip-shaped portion 13 can not only prevent the edge of the movable leaf 5 from being spun, but also prevent the edge of the movable leaf 5 from wrinkling after moisture absorption, especially wrinkling at intervals between the first strip-shaped portions 12, thereby avoiding affecting the curling window effect and appearance effect of the movable leaf 5.

[0061] In any functional adhesive layer 2 with a set shape, it is preferred to provide more than two first strips 12, each of which is parallel, spaced, and has the same length direction, so as to fully drive the movable leaf 5 to open and close. The second strip 13 connects the first strips 12 together to prevent wrinkles.

[0062] In summary, the moisture-absorbing and breathable fabric functional adhesive layer 2 made by the method has uniform thickness, clear contour, flat adhesive surface, strong adhesive force, a wide range of fabric base layer 3 can be selected, the cutting seam 4 has high cutting accuracy and controllable opening direction, and the appearance of the fabric after moisture absorption is better.

[0063] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details may be made to the present invention without departing from the spirit and scope of the invention as defined in the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A method for preparing a moisture-absorbing and breathable fabric, characterized in that: The following steps are involved: S1. Prepare a positioning film and a functional adhesive, lay the functional adhesive on the positioning film, wherein the functional adhesive is a hydrophilic polyurethane hot melt adhesive; S2. The functional rubber material is arranged and leveled, and the functional rubber material is cured to form a functional rubber layer; S3. The functional adhesive layer is engraved into a set shape by laser, and the functional adhesive layer having a set shape is retained on the positioning film, and the remaining functional adhesive layer is removed by laser; S4. The functional adhesive layer having a set shape is hot-pressed together with the positioning film on the fabric base to form a composite body, so that the functional adhesive layer is transferred to the fabric base, wherein the positioning film and the fabric base are located on both sides of the functional adhesive layer, and the fabric base and the functional adhesive layer have different hygroscopic expansion rates; S5. Cutting a slit on the fabric base layer by laser, wherein the slit is in a non-closed curve shape and penetrates the fabric base layer along the thickness direction of the fabric base layer, thereby forming an active page on the fabric base layer, and the position of the slit is adjacent to the position of the functional adhesive layer; The movable leaf has a movable edge and a fixed edge connected to each other, the shape of the movable edge is adapted to the shape of the slit, the fixed edge is the connecting edge between the movable leaf and the fabric base layer, and the functional adhesive layer with a set shape includes a first strip portion, the length direction of the first strip portion intersects with the length direction of the fixed edge; S6. removing the positioning film to obtain a moisture-absorbing and breathable fabric.

2. The method for preparing a moisture-absorbing and breathable fabric according to claim 1, characterized in that: Step S1 also includes: The solid functional adhesive is subjected to a heat treatment, the functional adhesive is heated to a set temperature, the functional adhesive is melted into a liquid state, and then the liquid functional adhesive is spread onto the positioning film.

3. The method for preparing a moisture-absorbing and breathable fabric according to claim 2, characterized in that: The set temperature is 90-120°C.

4. The method for preparing a moisture-absorbing and breathable fabric according to claim 1, characterized in that: In step S2: The functional rubber material is flattened by a scraper or a rubber coating roller, wherein the rubber coating roller comprises a central section and a limiting section, wherein the limiting sections are located at two ends of the central section, and the diameter of the limiting sections is greater than the diameter of the central section.

5. The method for preparing a moisture-absorbing and breathable fabric according to claim 1, characterized in that: In step S4: The temperature of the hot pressing composite is 140-150° C., and the duration of the hot pressing composite is 10-15 seconds.

6. The method for preparing a moisture-absorbing and breathable fabric according to claim 1, characterized in that: The thickness of the functional adhesive layer is 0.13-0.17 mm; the thickness of the positioning film is 0.03-0.15 mm.

7. The method for preparing a moisture-absorbing and breathable fabric according to claim 1, characterized in that: The functional adhesive layer having a set shape further includes a second strip portion, and the second strip portion is arranged along the movable edge and / or the fixed edge.

8. The method for preparing a moisture-absorbing and breathable fabric according to claim 7, characterized in that: The functional adhesive layer includes more than two first strip-shaped portions, the first strip-shaped portions are arranged at intervals and have the same length direction, and the second strip-shaped portion connects the first strip-shaped portions to each other.

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