Viscose spunlace non-woven fabric / chinlon knitted composite fabric and preparation method and application thereof

Abstract

The invention provides a viscose spunlace non-woven fabric / chinlon knitted composite fabric and a preparation method and application thereof. The viscose spunlace non-woven fabric / chinlon knitted composite fabric comprises an inner-layer hydrophobic fabric and an outer-layer hydrophilic fabric, wherein the inner-layer hydrophobic fabric and the outer-layer hydrophilic fabric are overlapped and fixed through a composite adhesive; wherein the inner-layer hydrophobic fabric is a chinlon knitted fabric, and the outer-layer hydrophilic fabric is a viscose spunlace non-woven fabric. The inner-layer fabric is the hydrophobic chinlon knitted fabric, the outer-layer fabric is the viscose non-woven fabric with good hydrophilicity, a water potential difference is formed in the structure through the difference of the hydrophilic and hydrophobic properties of the inner layer and the outer layer, and a wetting gradient is generated between the layers, so that water is spontaneously transferred from a hydrophobic end to a hydrophilic end, and the flowing direction of liquid is controlled; therefore, when the composite fabric serves as the inner layer fabric of the mask, condensed water of exhaled air can be guided to the viscose spunlace non-woven fabric from the chinlon knitted fabric serving as the skin attaching layer, so that the skin layer is kept relatively dry and comfortable, and the wearing experience of the mask is improved.

Description

Technical Field

[0001] The invention relates to the technical field of conventional protective masks, and in particular to a viscose spunlace nonwoven fabric / nylon knitted composite fabric and a preparation method and application thereof. Background Art

[0002] Masks are essential products used in medical treatment, public health safety and personal health protection, and the market demand is very high. Especially during the period when the epidemic is rampant, protective materials, especially masks, have become the first choice for everyone to go out. Therefore, a mask with strong comfort, good air permeability and good moisture permeability is essential. Most conventional disposable medical protective masks use non-woven fabrics as the inner layer material of the mask, which is highly hydrophobic, and thus cannot extract moisture from the exhaled gas of the human body, and the wearing comfort is poor. In addition, masks with multi-layer heterosexual structures have appeared in the prior art, and the inner layer also uses a hydrophobic inner layer and a hydrophilic outer layer, and a nanofiber filter layer is arranged between the inner layer and the outer layer. Similarly, the inner layer is a hydrophobic layer, which cannot extract moisture from the exhaled gas of the human body, and the wearing comfort is poor.

[0003] Therefore, a highly moisture-permeable protective mask that can extract moisture from exhaled gas and improve wearing comfort is of great significance. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the shortcomings of the prior art, the present invention provides a viscose spunlace non-woven fabric / nylon knitted composite fabric and a preparation method and application thereof, which forms a water potential difference between the inner and outer layers of the fabric and produces a wetness gradient between the layers, so that water is spontaneously transferred from the hydrophobic end to the hydrophilic end, thereby controlling the direction of liquid flow, improving moisture conductivity and moisture permeability, and solving the problems raised in the above-mentioned background technology.

[0006] (II) Technical solution

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] According to a first aspect of the present invention, a method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric is provided, comprising the following steps:

[0009] S1. Plain weave nylon filaments using a circular knitting machine, wash them, and shape them to obtain nylon knitted fabrics;

[0010] S2, preparing viscose spunlace nonwoven fabric by viscose fiber laying and spunlace reinforcement;

[0011] S3. The nylon knitted fabric and the viscose spunlace nonwoven fabric are fed into the laminating machine from two directions, and the composite adhesive is added between the nylon knitted fabric and the viscose spunlace nonwoven fabric through the adhesive roller of the laminating machine, and then the fabric is laminated by a pressing roller, rolled up and left to stand, so as to obtain the viscose spunlace nonwoven fabric / nylon knitted composite fabric.

[0012] Preferably, in step S1, the fineness of the nylon filament is 60-75D, and the number of strands is 20-30F.

[0013] Preferably, in step S1, the water washing temperature is 40-50° C., and the insulation time is 10-20 min.

[0014] Preferably, in step S1, the shaping temperature is 140-160°C.

[0015] Preferably, in step S2, the viscose fiber laying and hydroentanglement reinforcement method uses a flat straight laying method.

[0016] Preferably, in step S3, the composite adhesive is selected from PUR hot melt adhesive;

[0017] The diameter of the dot arc surface groove on the glue roller is 0.8 mm, the depth of the groove is 0.3 mm, and the groove spacing is 1.5 mm.

[0018] According to a second aspect of the present invention, there is provided a viscose spunlace nonwoven fabric / nylon knitted composite fabric obtained according to the above-mentioned preparation method, comprising an inner layer of hydrophobic fabric and an outer layer of hydrophilic fabric, wherein the inner layer of hydrophobic fabric and the outer layer of hydrophilic fabric are fixed by overlapping with a composite adhesive;

[0019] Wherein, the inner layer of hydrophobic fabric is nylon knitted fabric, and the outer layer of hydrophilic fabric is viscose spunlace non-woven fabric.

[0020] According to a third aspect of the present invention, there is provided a viscose spunlace nonwoven fabric / nylon knitted composite fabric for use as an inner layer fabric of a mask.

[0021] (III) Beneficial effects

[0022] The present invention provides a viscose spunlace nonwoven fabric / nylon knitted composite fabric and a preparation method and application thereof. It has the following beneficial effects:

[0023] (1) The present invention provides a viscose spunlace nonwoven fabric / nylon knitted composite fabric, wherein the inner layer fabric is a hydrophobic nylon knitted fabric, and the outer layer fabric is a hydrophilic viscose nonwoven fabric. The difference in hydrophilic and hydrophobic properties between the inner and outer layers forms a water potential difference in the structure, and a moisture gradient is generated between the layers, so that water is spontaneously transferred from the hydrophobic end to the hydrophilic end, thereby controlling the direction of liquid flow and improving the unidirectional moisture conduction ability of the composite fabric. When used as the inner layer fabric of a mask, most of the condensed water from sweat or exhaled gas will be guided from the nylon knitted fabric as the skin-contacting layer to the viscose spunlace nonwoven fabric, thereby keeping the skin layer relatively dry and improving the wearing experience of the mask.

[0024] (2) This scheme provides a viscose spunlace nonwoven fabric / nylon knitted composite fabric with a thickness of ≤1.2mm, an air permeability of ≥1600mm / s, and a moisture permeability of ≥4500g / m 2 ·d. Lightweight, breathable and has high moisture permeability.

[0025] (3) The present invention provides a method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric, which has low material cost, simple preparation method and small amount of glue. DETAILED DESCRIPTION

[0026] Hereinafter, the present invention will be described in detail. Before the description is made, it should be understood that the terms used in this specification and the appended claims should not be interpreted as being limited to the general meaning and dictionary meaning, but should be interpreted according to the corresponding meanings and concepts of the technical aspects of the present invention on the basis of the principle that the inventor is allowed to appropriately define the terms for the best interpretation. Therefore, the descriptions presented here are only preferred examples for the purpose of distance illustration and are not intended to limit the scope of the present invention, so that it should be understood that other equivalents or improved methods can be obtained without departing from the spirit and scope of the present invention.

[0027] Example 1

[0028] A method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric comprises the following steps:

[0029] Step 1, using a 34-inch 28-needle circular knitting machine and a crochet system to plain weave nylon filaments with a specification of 70D / 24F, washing and heat preservation at 40°C for 15 minutes, and shaping at 150°C to obtain nylon knitted fabric;

[0030] Step 2, the fiber web is laid by flat straight-laid viscose fiber web laying and spunlacing to prepare a viscose spunlaced nonwoven fabric;

[0031] Step 3, feeding the nylon knitted fabric and the viscose spunlace non-woven fabric from two directions of the laminating machine, adding the PUR hot melt adhesive between the nylon knitted fabric and the viscose spunlace non-woven fabric through the adhesive roller of the composite adhesive, and then laminating them through a pressing roller, winding them up and letting them stand, to obtain the viscose spunlace non-woven fabric / nylon knitted composite fabric, wherein the diameter of the dot arc surface groove on the adhesive roller is 0.8 mm, the depth of the groove is 0.3 mm, and the groove spacing is 1.5 mm.

[0032] The viscose spunlace nonwoven fabric / nylon knitted composite fabric prepared in this embodiment comprises an inner layer of hydrophobic fabric and an outer layer of hydrophilic fabric, wherein the inner layer of hydrophobic fabric and the outer layer of hydrophilic fabric are laminated and fixed by PUR hot melt adhesive; wherein the inner layer of hydrophobic fabric is nylon knitted fabric, the outer layer of hydrophilic fabric is viscose spunlace nonwoven fabric, the thickness of the composite fabric is 1.2 mm, the air permeability is 1700 mm / s, and the moisture permeability is 4700 g / m 2 ·d.

[0033] Example 2

[0034] A method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric comprises the following steps:

[0035] Step 1, using a 34-inch 28-needle circular knitting machine and a crochet system to plain weave nylon filaments with a specification of 60D / 20F, washing and heat preservation at 40°C for 15 minutes, and shaping at 150°C to obtain nylon knitted fabric;

[0036] Step 2, the fiber web is laid by flat straight-laid viscose fiber web laying and spunlacing to prepare a viscose spunlaced nonwoven fabric;

[0037] Step 3, feeding the nylon knitted fabric and the viscose spunlace non-woven fabric from two directions of the laminating machine, adding the PUR hot melt adhesive between the nylon knitted fabric and the viscose spunlace non-woven fabric through the adhesive roller of the composite adhesive, and then laminating them through a pressing roller, winding them up and letting them stand, to obtain the viscose spunlace non-woven fabric / nylon knitted composite fabric, wherein the diameter of the dot arc surface groove on the adhesive roller is 0.8 mm, the depth of the groove is 0.3 mm, and the groove spacing is 1.5 mm.

[0038] The viscose spunlace nonwoven fabric / nylon knitted composite fabric prepared in this embodiment comprises an inner layer of hydrophobic fabric and an outer layer of hydrophilic fabric, wherein the inner layer of hydrophobic fabric and the outer layer of hydrophilic fabric are laminated and fixed by PUR hot melt adhesive; wherein the inner layer of hydrophobic fabric is nylon knitted fabric, the outer layer of hydrophilic fabric is viscose spunlace nonwoven fabric, the thickness of the composite fabric is 1.1 mm, the air permeability is 1600 mm / s, and the moisture permeability is 4650 g / m 2 ·d.

[0039] Example 3

[0040] A method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric comprises the following steps:

[0041] Step 1, using a 34-inch 28-needle circular knitting machine and a crochet system to plain weave nylon filaments with a specification of 75D / 30F, washing and heat preservation at 40°C for 15 minutes, and shaping at 150°C to obtain nylon knitted fabric;

[0042] Step 2, the fiber web is laid by flat straight-laid viscose fiber web laying and spunlacing to prepare a viscose spunlaced nonwoven fabric;

[0043] Step 3, feeding the nylon knitted fabric and the viscose spunlace non-woven fabric from two directions of the laminating machine, adding the PUR hot melt adhesive between the nylon knitted fabric and the viscose spunlace non-woven fabric through the adhesive roller of the composite adhesive, and then laminating them through a pressing roller, winding them up and letting them stand, to obtain the viscose spunlace non-woven fabric / nylon knitted composite fabric, wherein the diameter of the dot arc surface groove on the adhesive roller is 0.8 mm, the depth of the groove is 0.3 mm, and the groove spacing is 1.5 mm.

[0044] The viscose spunlace nonwoven fabric / nylon knitted composite fabric prepared in this embodiment comprises an inner layer of hydrophobic fabric and an outer layer of hydrophilic fabric, wherein the inner layer of hydrophobic fabric and the outer layer of hydrophilic fabric are laminated and fixed by PUR hot melt adhesive; wherein the inner layer of hydrophobic fabric is nylon knitted fabric, the outer layer of hydrophilic fabric is viscose spunlace nonwoven fabric, the thickness of the composite fabric is 1.2 mm, the air permeability is 1800 mm / s, and the moisture permeability is 4860 g / m 2 ·d.

[0045] As mentioned above, the air permeability and moisture permeability of the viscose spunlace nonwoven / nylon knitted composite fabric can be adjusted by adjusting the specifications of the nylon filaments. However, considering the material cost, the specifications of the nylon filaments are selected from 70D / 24F for best results. It not only has the characteristics of light weight, moderate fabric gap, tight structure, and low processing difficulty of subsequent washing and finishing, but also meets the requirements for air permeability and moisture permeability. If finer nylon filaments are used, not only the raw material price is high, but also the fabric gap is too large, the structure is loose, and the difficulty of subsequent washing and finishing and composite processing is increased.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric, characterized in that: The following steps are involved: S1. Plain weave nylon filaments using a circular knitting machine, wash them, and shape them to obtain nylon knitted fabrics; S2, preparing viscose spunlace nonwoven fabric by viscose fiber laying and spunlace reinforcement; S3. The nylon knitted fabric and the viscose spunlace nonwoven fabric are fed into the laminating machine from two directions, and the composite adhesive is added between the nylon knitted fabric and the viscose spunlace nonwoven fabric through the adhesive roller of the laminating machine, and then the fabric is laminated by a pressing roller, rolled up and left to stand, so as to obtain the viscose spunlace nonwoven fabric / nylon knitted composite fabric.

2. The method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric according to claim 1, characterized in that: In step S1, the fineness of the nylon filament is 60-75D, and the number of strands is 20-30F.

3. The method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric according to claim 1, characterized in that: In step S1, the water washing temperature is 40-50°C, and the insulation time is 10-20 minutes.

4. The method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric according to claim 1, characterized in that: In step S1, the shaping temperature is 140-160°C.

5. The method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric according to claim 1, characterized in that: In step S2, the fiber laying of the viscose fiber laying and hydroentanglement reinforcement method is carried out in a flat straight laying manner.

6. The method for preparing a viscose spunlace nonwoven fabric / nylon knitted composite fabric according to claim 1, characterized in that: In step S3, the composite adhesive is selected from PUR hot melt adhesive; The diameter of the dot arc surface groove on the glue roller is 0.8 mm, the depth of the groove is 0.3 mm, and the groove spacing is 1.5 mm.

7. A viscose spunlace nonwoven fabric / nylon knitted composite fabric obtained by the preparation method according to any one of claims 1 to 6, characterized in that: It comprises an inner layer of hydrophobic fabric and an outer layer of hydrophilic fabric, wherein the inner layer of hydrophobic fabric and the outer layer of hydrophilic fabric are overlapped and fixed by a composite adhesive; Wherein, the inner layer of hydrophobic fabric is nylon knitted fabric, and the outer layer of hydrophilic fabric is viscose spunlace non-woven fabric.

8. Use of the viscose spunlace nonwoven fabric / nylon knitted composite fabric as claimed in claim 7 as an inner layer fabric of a mask.