Skin-friendly elastic fabric and preparation method thereof

Abstract

The present invention discloses a skin-friendly elastic fabric and a preparation method thereof. The preparation method of the skin-friendly elastic fabric comprises the following steps: Step 1: using a thermoplastic fiber surface layer and a cotton fiber surface layer to hydroentangle and compound and dry to obtain a composite fabric, and mechanically pleating the composite fabric into a wavy shape; Step 2: taking two layers of wavy composite fabrics prepared in Step 1, and the thermoplastic fiber surface layers of the two layers are close to each other, and the elastomer sandwiched between the two layers is used as an intermediate layer for thermal compounding, and after compounding, the elastomer is cooled and shaped to obtain the skin-friendly elastic fabric. The thermoplastic fiber surface layer side of the two layers of composite fabrics is thermally compounded by the intermediate layer composed of the elastomer, and the composite fabric is wavy, so that the tensile performance of the entire skin-friendly elastic fabric is good, and at the same time, because both sides of the skin-friendly composite fabric are cotton fiber surface layers, its skin-friendly performance is good.

Description

Technical Field

[0001] The invention belongs to the field of composite fabrics, and in particular relates to a skin-friendly elastic fabric and a preparation method thereof. Background Art

[0002] At present, the skin contact layer of the elastic waist bandage in disposable daily necessities and medical consumables is mainly spunbond material layer or elastic silk, etc., and consumers will feel itchy and other discomfort when using it. The material prepared by the spunlace process is not easy to shed, soft and comfortable, and is widely used in daily skin-friendly products. At the same time, cotton fiber is non-allergenic, soft and breathable, and has good hygienic properties. Therefore, the elastic bandage made by the cotton fiber spunlace process has good skin-friendliness and hygiene. However, due to the heat resistance of cotton fiber and the particularity of the spunlace process, it is difficult to make elastic bandages by the cotton fiber spunlace process. At present, CN114875685A "A method for producing elastic non-woven fabrics" discloses the following steps: S1: preparing coating; S2: soaking, washing, drying and standby; the invention uses coating to compound the elastic net into the non-woven fabric from top to bottom, which requires a large amount of chemical adhesives, which is not friendly to sensitive people. CN215904049U "A High Elastic Nonwoven Fabric" discloses that the outer sides of the upper cotton layer and the lower cotton layer are provided with sewn elastic bands. The patent combines the cotton layer and the elastic band by sewing, and the process is relatively traditional and has high labor costs. Summary of the invention

[0003] In order to achieve the above-mentioned object, the object of the present invention is to provide a skin-friendly elastic fabric with a simple preparation method and good elasticity.

[0004] In order to achieve the above object, the technical solution of the present invention is as follows: A method for preparing a skin-friendly elastic fabric comprises the following steps:

[0005] Step 1: hydroentangle the thermoplastic fiber surface layer and the cotton fiber surface layer and dry them to obtain a composite fabric, and mechanically pleat the composite fabric into a wavy shape;

[0006] Step 2: Take two layers of wavy composite fabrics prepared in step 1, with the thermoplastic fiber surface layers of the two layers close to each other, and perform thermal bonding with an elastomer sandwiched between the two layers as an intermediate layer. After bonding, cool and shape them to obtain a skin-friendly elastic fabric.

[0007] The beneficial effect of the above technical solution is that: by thermally compounding the thermoplastic fiber surface layer side of the two layers of composite fabrics with an intermediate layer composed of an elastomer, and the composite fabric is wavy, the tensile properties of the entire skin-friendly elastic fabric are good. At the same time, since both sides of the skin-friendly composite fabric are cotton fiber surface layers, its skin-friendly performance is good.

[0008] The preparation method of the composite fabric in step 1 of the above technical solution is as follows:

[0009] Step 1.1: Combing cotton fibers and thermoplastic fibers into webs respectively to prepare a cotton fiber surface layer and a thermoplastic fiber surface layer;

[0010] Step 1.2: folding the thermoplastic fiber surface layer back at even intervals along its length direction to form a thick mesh layer area, and the area between two adjacent thick mesh layer areas is a thin mesh layer area, and the convex directions of the thick mesh layer areas are consistent;

[0011] Step 1.3: overlapping the thermoplastic fiber surface layer treated in step 1.2 with the cotton fiber surface layer, with the cotton fiber surface layer being located on the side of the thermoplastic fiber surface layer that is away from the convexity of the thick mesh layer area;

[0012] Step 1.4: The thermoplastic fiber surface layer and the cotton fiber surface layer laminated in step 1.3 are hydroentangled and composited, and then dried to obtain a composite fabric, and then the composite fabric is pleated into a wavy shape and placed in a fixed pleating device.

[0013] The beneficial effects of the above technical solution are: its preparation method is simple, and the composite performance between the cotton fiber surface layer and the thermoplastic fiber surface layer after composite is good.

[0014] The weight of the cotton fiber surface layer in step 1.1 of the above technical solution is 15-20g / m 2 The weight of the thermoplastic fiber surface layer is 10-15g / m 2 .

[0015] The beneficial effect of the above technical solution is that its thickness is moderate.

[0016] After the composite fabric is pleated in step 1.4 of the above technical solution, the raised side of each thick mesh layer area thereon forms a peak and is bonded to the middle layer.

[0017] The beneficial effect of the above technical solution is that it has good bonding effect. At the same time, because the thermoplastic fiber surface layer is folded back to form a thick mesh layer area to bond with the middle layer, the melting of the middle layer can be avoided from infiltrating into the cotton fiber surface layer, thereby always maintaining the skin-friendly performance of the cotton fiber surface layer.

[0018] In the step 1.2 of the above technical solution, the width of the thick mesh layer area is 2-4 cm, and the thickness is 0.1-0.2 mm, and the width of the thin mesh layer area is 4-6 cm, and the thickness is 0.05-0.1 mm.

[0019] The beneficial effect of the above technical solution is that it makes the bonding effect between the composite fabric and the intermediate layer better during thermal bonding.

[0020] The elastomer described in the above technical solution is TPU elastomer or spandex elastomer.

[0021] The beneficial effect of the above technical solution is that it has good elasticity.

[0022] In the above technical solution, in step 2, the raised side of each thick mesh layer area is bonded to the middle layer, and a through hole is enclosed between the thin mesh layer area and the middle layer between two adjacent thick mesh layer areas.

[0023] The beneficial effect of the above technical solution is that it can provide stretching margin for the stretching of the middle layer.

[0024] The temperature of the thermal compounding in step 2 of the above technical solution is 100-140°C.

[0025] The beneficial effect of the above technical solution is that its composite temperature is moderate.

[0026] The cooling and shaping in step 2 of the above technical solution is to cool the skin-friendly elastic fabric after thermal bonding at room temperature for 2-3 hours in a naturally relaxed state.

[0027] The beneficial effect of the above technical solution is that the stress in the skin-friendly elastic fabric can be released as much as possible, so that it can expand and contract naturally in the later stage.

[0028] The second object of the present invention is to provide a skin-friendly elastic fabric with good elasticity and good skin-friendly performance.

[0029] In order to achieve the above-mentioned purpose, the technical solution of the present invention is as follows: a skin-friendly elastic fabric, comprising the skin-friendly elastic fabric prepared by the preparation method of the skin-friendly elastic fabric as described above.

[0030] The beneficial effects of the above technical solution are: it has good skin affinity, good elasticity and good stretchability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the thermoplastic fiber surface layer in Example 1 of the present invention being folded back;

[0032] Figure 2 This is a schematic diagram of the structure of the composite fabric described in Example 1 of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of the composite fabric after pleating in Example 1 of the present invention;

[0034] Figure 4 This is a schematic structural diagram of the skin-friendly elastic fabric described in Example 1 of the present invention.

[0035] In the figure: 1 composite fabric, 11 thermoplastic fiber surface layer, 111 thick mesh layer area, 112 thin mesh layer area, 12 cotton fiber surface layer, 2 middle layer. DETAILED DESCRIPTION

[0036] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention. The present invention is described in more detail by way of example with reference to the accompanying drawings in the following paragraphs. The advantages and features of the present invention will become clearer according to the following description and claims. It should be noted that the drawings are all in a very simplified form and are not in precise proportions, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention.

[0037] Example 1

[0038] like Figure 1-Figure 4 As shown, this embodiment provides a method for preparing a skin-friendly elastic fabric, comprising the following steps:

[0039] Step 1: hydroentangle the thermoplastic fiber surface layer 11 and the cotton fiber surface layer 12 and dry them to obtain a composite fabric 1, and mechanically pleat the composite fabric 1 into a wavy shape;

[0040] Step 2: Take two layers of wavy composite fabrics 1 prepared in step 1, and place the thermoplastic fiber surface layer 11 sides of the two layers close to each other, and perform thermal compounding with an elastomer sandwiched between the two layers as an intermediate layer 2. After compounding, cool and shape the two layers of composite fabrics to obtain a skin-friendly elastic fabric. The composite fabric is formed by thermally compounding the thermoplastic fiber surface layer sides of the two layers of composite fabrics with an intermediate layer composed of an elastomer, and the composite fabric is wavy, so that the entire skin-friendly elastic fabric has good tensile properties. At the same time, since both sides of the skin-friendly composite fabric are cotton fiber surface layers, its skin-friendly performance is good.

[0041] The preparation method of the composite fabric 1 in step 1 of the above technical solution is as follows:

[0042] Step 1.1: Combing cotton fibers and thermoplastic fibers into webs respectively to prepare a cotton fiber surface layer 12 and a thermoplastic fiber surface layer 11;

[0043] Step 1.2: folding the thermoplastic fiber surface layer 11 back at even intervals along its length direction to form a thick mesh layer area 111, and the area between two adjacent thick mesh layer areas 111 is a thin mesh layer area 112, and the convex directions of the thick mesh layer areas 111 are consistent;

[0044] Step 1.3: overlapping the thermoplastic fiber surface layer 11 treated in step 1.2 with the cotton fiber surface layer 12, wherein the cotton fiber surface layer 12 is located on the side of the thermoplastic fiber surface layer 11 that is away from the protrusion of the thick mesh layer area 111;

[0045] Step 1.4: The thermoplastic fiber surface layer 11 and the cotton fiber surface layer 12 overlapped in step 1.3 are hydroentangled and then dried to obtain a composite fabric 1. The composite fabric 1 is then pleated into a wavy shape and placed in a fixed pleating device. The preparation method is simple, and the composite performance between the cotton fiber surface layer and the thermoplastic fiber surface layer is good after the composite.

[0046] In the step 1.1 of the above technical solution, the weight of the cotton fiber surface layer 12 is 15-20 g / m 2 The weight of the thermoplastic fiber surface layer 11 is 10-15g / m 2 , its thickness is moderate.

[0047] After the composite fabric 1 is pleated in step 1.4 of the above technical solution, the raised side of each thick mesh layer area 111 thereon forms a peak and is bonded to the middle layer 2, and the bonding effect is good. At the same time, since the thermoplastic fiber surface layer is folded back to form a thick mesh layer area to bond to the middle layer, the melting of the middle layer can be avoided from infiltrating into the cotton fiber surface layer, thereby always maintaining the skin-friendly performance of the cotton fiber surface layer.

[0048] In the step 1.2 of the above technical solution, the width of the thick mesh layer area 111 is 2-4 cm (the distance between two adjacent thin mesh layer areas), and the thickness is 0.1-0.2 mm. The width of the thin mesh layer area 112 is 4-6 cm (the distance between two adjacent thick mesh layer areas), and the thickness is 0.05-0.1 mm. This makes the bonding effect of the composite fabric and the intermediate layer better during thermal bonding.

[0049] The elastomer described in the above technical solution is TPU elastomer or spandex elastomer, which has good elasticity.

[0050] In step 2 of the above technical solution, the raised side of each thick mesh layer area 111 is bonded to the middle layer 2, and a through hole is formed between the thin mesh layer area 112 and the middle layer 2 between two adjacent thick mesh layer areas 111, thereby providing a stretching margin for the stretching of the middle layer.

[0051] The temperature of the thermal compounding in step 2 of the above technical solution is 100-140° C., and the compounding temperature is moderate.

[0052] The cooling and shaping in step 2 of the above technical solution is to cool the skin-friendly elastic fabric after thermal bonding at room temperature for 2-3 hours in a naturally relaxed state, so as to release the stress in the skin-friendly elastic fabric as much as possible, so that it can stretch and contract naturally in the later stage.

[0053] Example 2

[0054] Continue to see Figure 4 This embodiment provides a skin-friendly elastic fabric, including a skin-friendly elastic fabric prepared by the preparation method of the skin-friendly elastic fabric described in Example 1, which has good skin-friendliness, good elasticity, and good tensile properties.

[0055] Example 3

[0056] This embodiment provides a method for preparing a skin-friendly elastic fabric, comprising the following steps:

[0057] S1: Combing into a web, the raw materials for the web are hydrophilic polyester fiber (thermoplastic fiber) and pure cotton fiber (cotton fiber), wherein the hydrophilic polyester fiber is a hydrophilic polyester staple fiber for spunlace with a specification of 1.50-1.80 dtex × length 36-40 mm and a crimp number of 11.0-12.0 / 25 mm; the pure cotton fiber is a pure cotton fiber with a specification of 1.11-1.43 dtex × length 23-33 mm and a micronaire value of 3.7-4.2, wherein the ratio of hydrophilic polyester fiber to pure cotton fiber is 1:2, wherein the hydrophilic polyester fiber and pure cotton fiber are weighed in proportion, and after the grabbing and opening process, the hydrophilic polyester fiber and pure cotton fiber are combed into a web by two air flow conveying systems and a combing machine. The weight of the hydrophilic polyester fiber surface layer (thermoplastic fiber surface layer) is controlled at 10-15g / m 2 ; The weight of the pure cotton fiber surface layer (cotton fiber surface layer) is controlled at 20-30g / m 2 The hydrophilic polyester fiber surface layer is folded back into a thick and thin surface layer (a structure in which thick mesh layer areas and thin mesh layer areas are alternating), wherein the width of the thick mesh layer area in the hydrophilic polyester fiber surface layer is 2.0-4.0cm and the thickness is 0.1-0.2cm; the width of the thin mesh layer area is 4.0-6.0cm and the thickness is 0.05-0.1cm. At this time, the structure of the net laying is that the pure cotton fiber surface layer is at the bottom and the hydrophilic polyester fiber surface layer is at the top.

[0058] S2: Spunlace drying: The laid composite mesh layer is reinforced by a spunlace process and dried in an oven at a temperature of 100-120°C to obtain a composite fabric.

[0059] S3: Mechanical pleating: the composite fabric dried by spunlace is mechanically pleated in a fixed mold, and pleats are formed on the composite fabric every 3.0-5.0 cm. The thick mesh layer area is the turning point of pleating (corresponding to the position of the wave crest) and is located at the top, and the pleated composite fabric in the fixed mold is transferred together.

[0060] S4: Thermal composite, select TPU elastomer as the middle layer, and transfer the two composite surface layers to the upper and lower layers of the elastomer under the condition of fixed stretching of the TPU elastomer by mechanical equipment, in which the thick mesh layer area is in direct contact with the elastomer, and finally pass through an oven for thermal composite, wherein the oven temperature is 100-140℃.

[0061] S5: Cooling and shaping, cool the composite skin-friendly elastic fabric at room temperature for 2-3 hours in a naturally relaxed state.

[0062] The skin-friendly elastic fabric prepared in this embodiment has extremely high elasticity, strong recovery, softness and comfort, good hygiene, and strong composite properties, and is more suitable for use in disposable medical elastic products such as skin-friendly elastic bandages and skin-friendly restraints.

[0063] Example 4

[0064] The same as Example 3, except that in step S1, the thermoplastic fiber is a hydrophilic polypropylene staple fiber with a fineness of 0.60-0.80 dtex × a length of 35-40 mm and a crimp number of 11.0-12.0 / 25 mm for spunlace; wherein the weight of the thermoplastic fiber surface layer is controlled at 10-12 g / m 2 ; The weight of the pure cotton fiber surface layer is controlled at 18-25g / m 2 .

[0065] The skin-friendly elastic fabric prepared in this embodiment has high elasticity, strong recovery, softness and comfort, and is lighter in overall weight, and is more suitable for use in disposable lightweight products such as diapers, waist elastic materials for menstrual pants, and the like.

[0066] It should be noted that the above detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present application belongs.

[0067] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0068] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example.

[0069] Also, when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0070] In addition, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus that includes a series of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, product, or apparatus.

[0071] For ease of description, spatially relative terms such as "on", "above", "on the upper surface of", "upper", etc. may be used herein to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figures. It should be understood that the spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures.

[0072] For example, if a device in a drawing is inverted, a device described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above" can encompass both "above" and "below." The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

[0073] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in the industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with the profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A method for preparing a skin-friendly elastic fabric, It is characterized in that The steps include: Step 1: hydroentangle a thermoplastic fiber surface layer (11) and a cotton fiber surface layer (12) and dry them to obtain a composite fabric (1), and mechanically pleat the composite fabric (1) into a wave shape; Step 2: Take two layers of the wavy composite fabric (1) prepared in step 1, with the thermoplastic fiber surface layers (11) of the two layers close to each other, and use an elastic body sandwiched between the two layers as an intermediate layer (2) for thermal bonding. After bonding, cool and shape the two layers to obtain a skin-friendly elastic fabric; The preparation method of the composite fabric (1) in step 1 is as follows: Step 1.1: Combing cotton fibers and thermoplastic fibers into webs respectively to prepare a cotton fiber surface layer (12) and a thermoplastic fiber surface layer (11); Step 1.2: folding the thermoplastic fiber surface layer (11) back at even intervals along its length direction to form a thick mesh layer area (111), and the area between two adjacent thick mesh layer areas (111) is a thin mesh layer area (112), and the convex directions of the thick mesh layer areas (111) are consistent; Step 1.3: overlapping the thermoplastic fiber surface layer (11) treated in step 1.2 with the cotton fiber surface layer (12), with the cotton fiber surface layer (12) being located on the side of the thermoplastic fiber surface layer (11) that is away from the protrusion of the thick mesh layer region (111); Step 1.4: The thermoplastic fiber surface layer (11) and the cotton fiber surface layer (12) laminated in step 1.3 are hydroentangled and then dried to obtain a composite fabric (1). The composite fabric (1) is then pleated into a wave shape and placed in a fixed pleating device.

2. The method for preparing the skin-friendly elastic fabric according to claim 1, It is characterized in that The weight of the cotton fiber surface layer (12) in step 1.1 is 15-20 g / m 2 The weight of the thermoplastic fiber surface layer (11) is 10-15g / m 2 .

3. The method for preparing the skin-friendly elastic fabric according to claim 1, It is characterized in that In the step 1.2, the width of the thick mesh layer area (111) is 2-4 cm, and the thickness is 0.1-0.2 mm, and the width of the thin mesh layer area (112) is 4-6 cm, and the thickness is 0.05-0.1 mm.

4. The method for preparing the skin-friendly elastic fabric according to claim 1, It is characterized in that After the composite fabric (1) is pleated in step 1.4, the raised side of each thick mesh layer area (111) thereon forms a wave crest and is bonded to the middle layer (2).

5. The method for preparing the skin-friendly elastic fabric according to claim 1, It is characterized in that The elastomer is a TPU elastomer or a spandex elastomer.

6. The method for preparing the skin-friendly elastic fabric according to claim 4, It is characterized in that A through hole is formed between the thin mesh layer area (112) between two adjacent thick mesh layer areas (111) and the middle layer (2).

7. The method for preparing the skin-friendly elastic fabric according to claim 1, It is characterized in that The temperature of the thermal compounding in step 2 is 100-140°C.

8. The method for preparing the skin-friendly elastic fabric according to claim 1, It is characterized in that The cooling and shaping in step 2 is to cool the skin-friendly elastic fabric after thermal bonding in a naturally relaxed state at room temperature for 2-3 hours.

9. A skin-friendly elastic fabric, It is characterized in that The skin-friendly elastic fabric is prepared by the preparation method according to any one of claims 1 to 8.

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