Super-soft adsorption moisture-permeable nursing spunlace material and preparation method thereof

Abstract

The invention provides a super-soft adsorption moisture-permeable spunlace material and a preparation method thereof. The super-soft adsorption moisture-permeable nursing spunlace material is composed of a super-soft adsorption layer and a supporting layer, the super-soft adsorption layer is formed by fibrillated fine denier lyocell fibers; the supporting layer is composed of coarse denier polyester fibers; the fibrillated fine-denier lyocell fibers and the fibrillated coarse-denier polyester fibers are combined, so that capillary channels are formed in the material, and liquid is promoted to be transferred from the supporting layer to the super-soft adsorption layer under the capillary action. The method has the beneficial effects that the fibrillation phenomenon of the lyocell fibers is controlled and utilized, the entanglement effect of the fibers in the subsequent mixing process is guaranteed, and the material strength is improved; and the specific surface area of the fiber is also increased, so that the skin fitting property, the softness and the liquid absorption property of the material are enhanced. Raw materials with large fiber fineness difference are selected, the fibrillation phenomenon is further utilized, dense capillary channels are formed in the materials, the capillary effect of the capillary channels is fully exerted, and the liquid one-way transmission effect is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of nursing spunlace materials, and in particular to an ultra-soft absorbent and moisture-permeable spunlace material and a preparation method thereof. Background Art

[0002] With the development of the beauty industry, facial mask products have become a necessity in people's lives. More and more consumers have higher requirements for functionality such as softness and skin-fitting. Therefore, the characteristics of extreme softness and skin-fitting have become a high-end research direction for facial mask base materials.

[0003] At present, non-woven materials made of regenerated cellulose fiber, lyocell fiber, polyester fiber, etc. are widely used as carriers of facial mask base fabrics. However, in actual use, different facial mask base fabrics may have various problems such as poor skin-friendliness, poor moisture permeability, lack of softness, excessive thickness, and severe pilling.

[0004] For example, application number 201811052002.X discloses a degradable, highly absorbent, and removable wet-process spunlace nonwoven mask base fabric made of viscose fiber, wood pulp fiber, and PLA fiber in a fiber ratio of 50:38:12. After the raw materials are initially processed, they are first wet-processed to obtain a base fabric sample, and then combined with the spunlace process, the sample is subjected to three spunlaces to reinforce it, and finally the reinforced mask base fabric is thermally bonded by a hot air process, and the obtained mask base fabric has a surface density of 39g / m2-41g / m2. The mask base fabric prepared by this process has problems such as easy pilling and shedding, which greatly affects the consumer experience when used. Summary of the invention

[0005] In order to solve the technical problems that the mask materials prepared by the existing wet molding process have poor adsorption and moisture permeability, and the mask materials formed by the composite process have high thickness and poor softness, the present invention provides an ultra-soft adsorption and moisture-permeable care spunlace material and a preparation method.

[0006] The specific technical scheme of the present invention is:

[0007] In the first aspect, the present invention provides an ultra-soft absorbent and moisture-permeable care spunlace material, which is composed of an ultra-soft absorbent layer and a support layer; the ultra-soft absorbent layer is composed of fibrillated fine-denier lyocell fibers; the support layer is composed of coarse-denier polyester fibers; the fibrillated fine-denier lyocell fibers and the coarse-denier polyester fibers are combined to form capillary channels inside the material, thereby promoting the transfer of liquid from the support layer to the ultra-soft absorbent layer under capillary action.

[0008] Research has found that Lyocell fibers undergo fibrillation during processing. In conventional wet fiber preparation and wet molding processes, the fibrillation of fibers is uncontrollable and has a certain degree of randomness. The fibrillated fibers produced in this state will affect the product's fuzzing, chipping, strength and other properties. Therefore, process improvements are made during the fiber stirring and grinding process, and a circulating grinding device is set up to fully fibrillate the fibers. This can not only ensure the entanglement effect of the fibers during subsequent mixing and improve the strength of the material, but also increase the specific surface area of ​​the fibers, thereby enhancing the material's skin-fitting, softness and liquid absorption.

[0009] In addition, the support layer uses coarse denier polyester fibers in order to combine with the fibrillated fine denier lyocell fibers in the ultra-soft adsorption layer, thereby forming capillary channels inside the material, which is conducive to the capillary effect, promoting the transfer of liquids such as essence and water from the support layer to the ultra-soft adsorption layer under capillary action, thereby enhancing the skin's absorption of essence and water.

[0010] Preferably, the linear density of the fine denier lyocell fiber is less than 0.9 dtex, and the linear density of the coarse denier polyester fiber is greater than 2.0 dtex.

[0011] Reason: The two fiber layers should use fiber raw materials with a large difference in thickness as much as possible, so as to strengthen the formation of capillary channels, which is beneficial to improving the material's ability to transport liquids.

[0012] Preferably, the ratio of the surface density of the ultra-soft adsorption layer to the surface density of the support layer is 0.6-1, and the ratio of the thickness of the ultra-soft adsorption layer to the thickness of the support layer is 0.3-0.6.

[0013] The study found that: when the ratio of the surface density of the ultra-soft adsorption layer to the surface density of the support layer is less than 0.6, due to the large proportion of the support layer, the material's softness, skin-friendliness and pilling performance are very poor, and it cannot meet the requirements of being used as a mask base fabric; and when the ratio of the surface density of the soft adsorption layer to the surface density of the support layer is greater than 1, the material's liquid absorption performance is too good, affecting the functionality of the capillary channels inside the material, which is not conducive to the one-way flow of liquid.

[0014] Preferably, the fibrillation rate of the fine denier lyocell fiber is greater than 80%.

[0015] Reason: To split as many fluffy microfibers as possible on the fiber surface, so that when compounded with the coarse denier polyester fiber layer, more and more stable capillary channels are formed to enhance the capillary effect.

[0016] Preferably, the length of the fine denier lyocell fiber is 3 mm to 6 mm, and the moisture regain of the coarse denier polyester fiber is less than 4.5%.

[0017] Reason: This type of coarse denier polyester fiber has strong water-repellent properties. After the support layer composed of it is compounded with the ultra-soft adsorption layer, it can form a fiber structure with certain unidirectional liquid-conducting properties. Ultimately, under the action of the above-mentioned capillary effect, its unidirectional flowability can be fully exerted.

[0018] Preferably, the ultra-soft absorbent moisture-permeable care spunlace material is a mesh spunlace non-woven fabric with a mesh size of 40 to 60 meshes, and the mass per unit area of ​​the ultra-soft absorbent moisture-permeable care spunlace material is 40 g / m 2 ~60g / m 2 .

[0019] On the other hand, the present invention provides a method for preparing an ultra-soft absorbent and moisture-permeable care spunlace material:

[0020] (1) adding fine denier lyocell fibers into a 1# fiber stirring tank, and preparing a fully fibrillated first fiber slurry through stirring, circulating grinding, and impurity removal;

[0021] (2) feeding the first fiber slurry into an inclined screen forming system, and forming the first wet-laid fiber web, i.e., the ultra-soft adsorption layer, through the inclined screen forming process;

[0022] (3) adding the coarse denier polyester fiber into the 2# fiber stirring tank, stirring and dispersing to obtain a second fiber slurry, and then forming the second wet-laid fiber web, i.e., the support layer, through an inclined net;

[0023] (4) After the ultra-soft fiber layer is compounded with the support layer, it is subjected to spunlace reinforcement, mesh jacquard, rolling, drying and rolling to produce an ultra-soft absorbent, moisture-permeable and care spunlace material.

[0024] Preferably, in step (1), the concentration of the fiber slurry 1 is 0.7wt% to 1.2wt%; the volume of the fiber slurry is controlled at 20m 3 ~40m 3 ; The flow rate is 1500L / min~2500L / min; the circulation disc grinding time is set to 15min~30min; the circulation disc grinding power is 60%~100%.

[0025] In addition, in order to prevent the inevitable phenomenon of fiber entanglement and formation of cotton lumps caused by fiber fibrillation, a de-impurity device is set up to further filter out impurities such as cotton lumps and cotton balls.

[0026] Preferably, in step (3), the concentration of the fiber slurry 2 is 0.5wt% to 1.5wt%.

[0027] Preferably, in step (4), the mesh jacquard has an aperture of 40 to 60 meshes.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] (1) The present invention controls and utilizes the fibrillation phenomenon of lyocell fibers, which not only ensures the entanglement effect of the fibers during subsequent mixing and improves the strength of the material, but also increases the specific surface area of ​​the fibers, thereby enhancing the skin-fitting, softness and liquid absorption of the material.

[0030] (2) The present invention selects raw materials with a large difference in fiber fineness and further utilizes the fibrillation phenomenon to form dense capillary channels inside the material, giving full play to its capillary effect to achieve the effect of unidirectional liquid transmission.

[0031] (3) The present invention conducts in-depth research and imposes restrictions on the fibrillation rate and moisture regain of the fiber, which is different from the conventional product structure and further enhances the functionality of the material such as softness, moisture permeability and adsorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the cross-sectional structure of the ultra-soft absorbent and moisture-permeable care spunlace material according to Example 1 of the present invention.

[0033] The accompanying drawings are marked as: ultra-soft adsorption layer 1, support layer 2. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with embodiments and drawings.

[0035] Overall embodiment

[0036] A super soft absorbent moisture permeable care spunlace material, such as Figure 1 As shown, it is composed of an ultra-soft absorption layer 1 and a support layer 2; the ultra-soft absorption layer 1 is composed of fibrillated fine-denier lyocell fibers; the support layer 2 is composed of coarse-denier polyester fibers.

[0037] As a specific implementation, the linear density of the fine denier lyocell fiber is less than 0.9 dtex; the linear density of the coarse denier polyester fiber is greater than 2.0 dtex.

[0038] As a specific implementation manner, the ratio of the surface density of the ultra-soft adsorption layer to the surface density of the support layer is 0.6-1.

[0039] As a specific implementation manner, the ratio of the thickness of the ultra-soft adsorption layer to the thickness of the support layer is 0.3 to 0.6.

[0040] As a specific implementation, the fibrillation rate of the fine denier lyocell fiber is greater than 80%.

[0041] As a specific implementation, the length of the fine denier lyocell fiber is 3 mm to 6 mm.

[0042] As a specific implementation, the moisture regain of the coarse denier polyester fiber is less than 4.5%.

[0043] As a specific implementation, the ultra-soft absorbent moisture-permeable care spunlace material is a mesh spunlace non-woven fabric with a mesh size of 40 to 60 meshes.

[0044] As a specific implementation method, the ultra-soft absorbent moisture permeable care spunlace material has a unit area mass of 40 g / m 2 ~60g / m 2 .

[0045] A method for preparing an ultra-soft absorbent and moisture-permeable care spunlace material comprises the following steps:

[0046] (1) adding fine denier lyocell fibers into a 1# fiber stirring tank, and preparing a fully fibrillated first fiber slurry through stirring, circulating grinding, and impurity removal;

[0047] (2) feeding the first fiber slurry into an inclined screen forming system, and forming the first wet-laid fiber web, i.e., the ultra-soft adsorption layer, through the inclined screen forming process;

[0048] (3) adding the coarse denier polyester fiber into the 2# fiber stirring tank, stirring and dispersing to obtain a second fiber slurry, and then forming the second wet-laid fiber web, i.e., the support layer, through an inclined net;

[0049] (4) After the ultra-soft fiber layer is compounded with the support layer, it is subjected to spunlace reinforcement, mesh jacquard, rolling, drying and rolling to produce an ultra-soft absorbent, moisture-permeable and care spunlace material.

[0050] As a specific embodiment, in step (1), the concentration of the fiber slurry 1 is 0.7wt% to 1.2wt%; the volume of the fiber slurry is controlled at 20m 3 ~40m 3 ; The flow rate is 1500L / min~2500L / min; the circulation disc grinding time is set to 15min~30min; the circulation disc grinding power is 60%~100%.

[0051] As a specific implementation, in step (3), the concentration of the fiber slurry 2 is 0.5wt% to 1.5wt%.

[0052] As a specific implementation, in the step (4), the aperture of the mesh jacquard is 40-60 mesh.

[0053] Example 1

[0054] A super-soft absorbent moisture-permeable care spunlace material, wherein the super-soft absorbent layer is composed of 100% fine-denier lyocell fibers, wherein the fine-denier lyocell fibers have a linear density of 0.8 dtex and a length of 5 mm; the support layer is composed of 100% coarse-denier polyester fibers, wherein the coarse-denier polyester fibers have a linear density of 2.5 dtex and a moisture regain of 4.2%; the surface density ratio of the super-soft absorbent layer to the surface density of the support layer is 0.805; the thickness ratio of the super-soft absorbent layer to the thickness of the support layer is 0.5; the fibrillation rate of the fine-denier lyocell fibers is 85%; the super-soft absorbent moisture-permeable care spunlace material is a mesh spunlace non-woven fabric, and the mesh number is 50 meshes; the unit area mass of the super-soft absorbent moisture-permeable care spunlace material is 50 g / m 2 .

[0055] A method for preparing an ultra-soft absorbent and moisture-permeable care spunlace material comprises the following steps:

[0056] (1) Add fine denier lyocell fiber into a 1# fiber stirring tank, and obtain a fiber slurry with a concentration of 1 wt% by stirring, circulating grinding, and impurity removal; wherein the volume of the fiber slurry is controlled at 30 m 3 ; Flow rate is 2000L / min; Circulation disc grinding time is set to 30min; Circulation disc grinding power is 70%;

[0057] (2) The fiber slurry is fed into an inclined screen forming system and formed into a wet-laid fiber web 1 after being formed by the inclined screen. The unit area mass of the wet-laid fiber web 1 is 22.3 g / m 2 ;

[0058] (3) Add the coarse denier polyester fiber into the 2# fiber stirring tank, stir and disperse it to obtain a fiber slurry 2, the concentration of which is 1.2 wt%, and then form it through an inclined net to obtain a wet-laid fiber web 2, the unit area mass of which is 27.7 g / m 2 ;

[0059] (4) After the ultra-soft fiber layer is compounded with the support layer, it is subjected to spunlace reinforcement, mesh jacquard, rolling, drying and rolling to produce an ultra-soft absorbent and moisture-permeable care spunlace material;

[0060] Example 2

[0061] An ultra-soft absorbent, moisture-permeable, care spunlace material, which is different from Example 1 only in that the fibrillation rate of the fine-denier lyocell fiber is 70%.

[0062] Comparative Example 1

[0063] An ultra-soft absorbent and moisture-permeable care spunlace material, which is different from Example 1 only in that the ratio of the surface density of the ultra-soft absorbent layer to the surface density of the support layer is 0.5.

[0064] Comparative Example 2

[0065] An ultra-soft absorbent and moisture-permeable care spunlace material, which is different from Example 1 only in that the ratio of the surface density of the ultra-soft absorbent layer to the surface density of the support layer is 1.5.

[0066] Comparative Example 3

[0067] A super soft absorbent moisture permeable care spunlace material, which is different from Example 1 only in that: the super soft absorbent moisture permeable care spunlace material has a unit area mass of 70g / m 2 .

[0068] Comparative analysis of test data:

[0069] Test purpose: Example 1, Example 2, Comparative Example 1, Comparative Example 2 and Comparative Example 3 were tested respectively to test the unit area mass, thickness, softness, breaking strength and breaking elongation index of the materials, and conduct comparative analysis.

[0070] Test method:

[0071] (1) Mass per unit area: Tested in accordance with GB / T 24218.1 Textiles - Test methods for nonwoven fabrics - Part 1: Determination of mass per unit area;

[0072] (2) Dry thickness: Tested in accordance with GB / T 24218.2 Textiles - Test methods for nonwovens - Part 2: Determination of thickness;

[0073] (3) Breaking strength: Tested in accordance with GBT / 24218.3 "Textile nonwovens test methods Part 3: Determination of breaking strength and elongation at break (strip method)";

[0074] (4) Softness: According to GB / T 8942-2016 Determination of paper softness

[0075] Test comparison data:

[0076]

[0077]

[0078] Criteria:

[0079] (1) The smaller the softness value, the softer the material;

[0080] Test result analysis:

[0081] (1) Comparative Example 1: Since the ratio of the surface density of the ultra-soft adsorption layer to the surface density of the support layer in Comparative Example 1 is 0.5, the material thickness, strength and softness values ​​are significantly increased. However, the increase in material thickness is not conducive to liquid absorption, and the increase in softness value indicates that the material is not soft enough.

[0082] (2) Compared with Example 1, since the ratio of the surface density of the ultra-soft adsorption layer to the surface density of the support layer in Example 2 is 1.5, the material thickness, strength and softness values ​​are significantly reduced, but the strength is greatly affected, which is not conducive to use.

[0083] (3) Compared with Example 1, the fibrillation rate of the fine denier lyocell fiber in Example 2 is 70%, and the number of fluffy fine microfibers split out from the fiber surface is reduced, resulting in a decrease in the softness of the material and an increase in strength.

[0084] (4) Compared with Example 1, the mass per unit area of ​​the material in Example 3 is too high, and the material thickness and strength are too high, resulting in poor softness.

[0085] The raw materials and equipment used in the present invention, unless otherwise specified, are all commonly used raw materials and equipment in the art; the methods used in the present invention, unless otherwise specified, are all conventional methods in the art.

[0086] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent transformation made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. An ultra-soft absorbent and breathable spunlace material, characterized by: The spunlace material consists of an ultra-soft adsorption layer and a support layer. The ultra-soft adsorption layer is composed of fibrillated fine-denier lyocell fibers, and the support layer is composed of coarse-denier polyester fibers. The fibrillated fine-denier lyocell fibers and the coarse-denier polyester fibers are combined to form capillary channels inside the material, thereby promoting the transfer of liquid from the support layer to the ultra-soft adsorption layer under capillary action.

2. The ultra-soft absorbent and breathable spunlace material according to claim 1, characterized in that: The linear density of the fine-denier lyocell fiber is less than 0.9 dtex, and the linear density of the coarse-denier polyester fiber is greater than 2.0 dtex.

3. The ultra-soft absorbent and breathable spunlace material according to claim 2, characterized in that: The ratio of the surface density of the ultra-soft adsorption layer to the surface density of the support layer is 0.6-1, and the ratio of the thickness of the ultra-soft adsorption layer to the thickness of the support layer is 0.3-0.

6.

4. The ultra-soft absorbent and breathable spunlace material according to claim 3, characterized in that: The fibrillation rate of the fine-denier lyocell fiber is greater than 80%.

5. The ultra-soft absorbent and breathable spunlace material according to claim 4, characterized in that: The length of the fine-denier lyocell fiber is 3 mm to 6 mm, and the moisture regain of the coarse-denier polyester fiber is less than 4.5%.

6. The ultra-soft absorbent and breathable spunlace material according to claim 5, characterized in that: The ultra-soft absorbent moisture-permeable care spunlace material is a mesh spunlace non-woven fabric with a mesh size of 40 to 60 meshes. The ultra-soft absorbent moisture-permeable care spunlace material has a unit area mass of 40 g / m 2 ~60g / m 2 .

7. A method for preparing the ultra-soft absorbent and breathable spunlace material according to any one of claims 1 to 6, characterized in that: The steps include: (1) adding fine denier lyocell fibers into a 1# fiber stirring tank, and preparing a fully fibrillated first fiber slurry through stirring, circulating grinding, and impurity removal; (2) feeding the first fiber slurry into an inclined screen forming system, and forming the first wet-laid fiber web, i.e., the ultra-soft adsorption layer, after being formed by the inclined screen; (3) adding the coarse denier polyester fiber into the 2# fiber stirring tank, stirring and dispersing to obtain a second fiber slurry, and then forming the second wet-laid fiber web, i.e., the support layer, through an inclined net; (4) After the ultra-soft fiber layer is compounded with the support layer, it is subjected to spunlace reinforcement, mesh jacquard, rolling, drying and rolling to produce an ultra-soft absorbent, moisture-permeable and care spunlace material.

8. The preparation method according to claim 7, characterized in that: In the step (1), the concentration of the first fiber slurry is 0.7wt% to 1.2wt%; the volume of the first fiber slurry is controlled at 20m 3 ~40m 3 ; The flow rate is 1500L / min~2500L / min; the circulation disc grinding time is set to 15min~30min; the circulation disc grinding power is 60%~100%.

9. The preparation method according to claim 7, characterized in that: In the step (3), the concentration of the second fiber slurry is 0.5wt% to 1.5wt%.

10. The preparation method according to claim 7, characterized in that: In the step (4), the mesh jacquard has an aperture of 40 to 60 meshes.

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