CN113151977B

CN113151977B - Super-soft anti-reverse-seepage kapok diaper material and preparation method thereof

Info

Publication number: CN113151977B
Application number: CN202110138903.6A
Authority: CN
Inventors: 李素英; 刘诺; 郝芃; 严峻; 张海峰; 孙信; 李伟岸
Original assignee: Nantong University
Current assignee: Shandong Hengfa Sanitary Products Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2022-07-05
Anticipated expiration: 2041-02-01
Also published as: CN113151977A

Abstract

The invention discloses a super soft and anti-reverse osmosis kapok diaper material. The material is composed of two fiber webs with different pore sizes in gradient. It is viscose/wood pulp wet-laid fiber web; its preparation method is as follows: 1) uniform kapok/viscose spunlace fiber web is preliminarily obtained by spunlace process; Viscose/wood pulp wet-laid fiber web; ③The viscose/wood pulp wet-laid fiber web output from the inclined web and the kapok/viscose spunlace fiber web output from the lower web are then compounded by flat web and drum spunlace; ④ The composite fiber web is dried in a drying cylinder and hot air combined, and after dehydration, a super-soft anti-reverse osmosis kapok diaper material is obtained. The advantages of the present invention: the excellent characteristics of kapok are fully exerted through the non-woven process, and the production cost is low, light and soft, dry and breathable, antibacterial and anti-mite, fast penetration and absorption, not easy to reverse osmosis, safe and environmentally friendly.

Description

Super-soft anti-reverse-seepage kapok diaper material and preparation method thereof

Technical Field

The invention relates to an ultra-soft anti-reverse osmosis kapok diaper material and a preparation method thereof, and the diaper material is suitable for the field of sanitary materials.

Background

With the development of economy and the improvement of the living standard of people, the market demand for non-woven fabrics closely related to the life and work of people is continuously improved. Since the development of the diaper product as a main sanitary material, the modern diaper is a liquid absorption and control system established by a plurality of layers of non-woven materials, a surface layer is used as a first layer for realizing liquid absorption of the diaper, and the diaper product mainly has the functions of absorbing and transmitting liquid such as urine and the like to a next layer structure of the diaper, is required to be fine and soft, is kept dry and does not irritate the skin.

The wet surface course of urine on the market at present generally adopts the lower chemical synthesis fibre of hygroscopicity, makes the surface course material obtain the ability that liquid pierces through modes such as hydrophilic agent aftertreatment, now, for further giving the surface course special effect and satisfying the demand of market differentiation, people regard gradually nature, security and the feature of environmental protection of product itself. Patent CN107630319A discloses a local hydrophilic non-woven fabrics and production method thereof, it has adopted the hot-rolling to carry out unsmooth processing to hydrophobic non-woven fabrics, and at the sunken hydrophilic agent of coating, body fluid contact non-woven fabrics surface can bypass hydrophobic arch and water conservancy diversion is absorbed by the absorbed layer in hydrophilic sunken when being used for the diaper surface course, with this dry and comfortable effect of surface course that obtains, but the concave-convex structure of its formation can cause uncomfortable sense to the skin on the one hand, on the other hand also can destroy concave-convex structure and make sunken moisture reverse osmosis to the skin easily under human pressure effect, and it adopts chemical fiber, chemical finishing agent, biological safety is not good enough, also do not do benefit to sustainable development. The kapok fiber is the finest, lightest and highest-hollowness fiber in natural fibers, has the advantages of antibiosis, mildew prevention, mite prevention, good chemical performance, hydrophobicity, oleophylicity, no odor, no toxicity and no human allergic substances, is a green ecological biodegradable natural fiber, is also a novel material in the textile field, and has social, economic and environmental protection significance when being developed and utilized.

Disclosure of Invention

Aiming at the problems of the existing diaper materials, the invention comprehensively applies a non-woven wet-method web forming process, a flat screen and a drum spunlace process to prepare a composite web, takes the fluffy kapok/viscose spunlace web with a larger aperture structure as a surface layer, and takes the viscose/wood pulp wet-method web with a smaller aperture structure as an absorption layer, thereby maintaining the structure of the kapok fiber, fully exerting the excellent characteristics of the kapok fiber, and meeting the requirements of the development of the diaper materials on functionality, comfort, safety, environmental protection, light weight and individuation to a greater extent;

the invention aims to improve the rapid penetration, the reverse osmosis resistance and the antibacterial property of the diaper material, particularly a surface layer, by taking safety and environmental protection as the invention principle, introduces the natural kapok fiber, fully utilizes the physical structure and the excellent performance of the natural kapok fiber, and leads the surface layer material to be light, thin, comfortable, safe, efficient and more personalized.

The technical scheme is as follows: the super-soft anti-reverse osmosis kapok diaper material is prepared by compounding two fiber nets with different gradient pore diameters through a non-woven spunlace process; the absorption layer is a surface layer with larger aperture and an absorption layer with smaller aperture, and the surface layer is a fiber web prepared from kapok and viscose; the absorbent layer is a web made from viscose and wood pulp fibers.

Furthermore, the thickness of the kapok fiber is 0.9-1.8D, the length is 16-32mm, the thickness of the viscose fiber is 1.5-2.5D, and the length is 38-51 mm.

Furthermore, the thickness of the viscose staple fibers is 1.0-2.0D, the length of the viscose staple fibers is 8-12mm, and the wood pulp fibers are softwood pulp.

Further, the kapok/viscose spunlace fiber web and the viscose/wood pulp wet fiber web are compounded through a flat net and a rotary drum spunlace process, and then are dried through a drying cylinder and hot air in a combined mode, redundant water is evaporated, the fiber web is further reinforced, and the structure presents a pore structure with a large upper aperture and a small lower aperture.

Furthermore, the gram weight of the surface layer is 10-20g/m2, and the gram weight of the absorption layer is 30-40g/m 2.

Further, other fibers may be mixed in the surface layer.

The preparation method of the super-soft anti-reverse osmosis kapok diaper material comprises the following steps:

(1) pre-wetting kapok fibers with the mass fraction of 40% -60%, the thickness of 0.9-1.8D and the length of 16-32mm to prevent the kapok from flying apart in the subsequent processing process, then mixing the kapok fibers with viscose fibers with the mass fraction of 40% -60%, the thickness of 1.5-2.5D and the length of 38-51mm, opening and carding, preliminarily preparing uniform kapok/viscose spunlace fiber webs after two times of spunlacing, wherein the pore diameter is large and is beneficial to liquid penetration;

(2) dispersing 80-90% wood pulp into fibriform by special pulping equipment, mixing with 10-20% viscose staple fiber with the thickness of 1.0-2.0D and the length of 8-12mm to prepare homogeneous mixed pulp, wherein the mass concentration of the mixed pulp is 0.2-0.4%, and conveying the pulp to an inclined net under the action of a pulp pump to form a viscose/wood pulp wet-process web;

(3) the viscose/wood pulp wet-process fiber web output by the inclined net is stripped from the upper net under the pre-spunlace effect, and is laid on the kapok/viscose spunlace fiber web output by the lower net, the viscose/viscose spunlace fiber web and the kapok/viscose spunlace fiber web enter a lapping curtain as a whole and enter a flat net spunlace region along with the movement of the lapping curtain, the fiber web and a spunlace head are kept vertical, the spunlace pressure is 20-50MPa, and the number of spunlace channels is 4-7; then the spun-laced composite fiber web enters a drum spunlace area, the composite fiber web is tightly attached to the drum, the kapok/viscose spunlace fiber web is an outer layer, the pore enlargement spunlace effect is good, the viscose/wood pulp fiber web is an inner layer, fibers are further entangled under the action of pressure, the pore is reduced, finally the spun-laced composite fiber web is led away from the curved surface of the drum, and redundant water is removed through negative pressure suction and mangling by a mangle roller;

(4) and (3) drying the composite fiber web for 10-20s by passing through a drying cylinder with the temperature of 70-100 ℃, and then penetrating the fiber web by using hot air with the temperature of 90-120 ℃ to completely evaporate water, thus preparing the super-soft anti-reverse-seepage kapok diaper material.

Compared with the prior art, the invention has the beneficial effects that:

(1) the natural kapok fiber, the wood pulp fiber and the viscose fiber are used as raw materials, so that the biological safety is excellent; the viscose fiber is used for the surface layer fiber web, has certain hydrophilicity, can reduce the surface energy of the surface layer, accelerates the induced wicking and ensures that urine quickly penetrates through the surface layer fiber web; the wood pulp fiber is used for the fiber web of the absorption layer, so that the quick liquid absorption can be realized; the kapok fiber is hydrophobic and has a high-hollow structure, so that liquid penetrating through the surface layer is not easy to reverse seep, and the surface layer is kept dry and comfortable;

(3) the spunlace process is adopted to carry out primary shaping on the face layer ceiba/viscose spunlace fiber web, the flexible entanglement process ensures the fluffy porous structure of the face layer material, simultaneously the structure of the ceiba fiber is also completely maintained, and the excellent characteristics of the ceiba fiber are fully exerted;

(4) the flat net and the drum spunlace process are adopted to compound the two layers of fiber webs, chemical auxiliaries are not needed, the kapok/viscose spunlace fiber web is arranged on the outer layer of the drum, the pore enlargement spunlace effect is good, the viscose/wood pulp fiber web is arranged on the inner layer, fibers are further entangled under the action of pressure, the pore size is reduced, a pore structure with a larger upper pore size and a smaller lower pore size is endowed to the composite fiber web, and the capillary wicking effect is enhanced;

(5) the used fiber is completely biodegradable, and the sustainable development is met;

(6) the preparation method is easy to operate and can be used for mass production.

Drawings

FIG. 1 is a structural cross-sectional view of the present invention;

FIG. 2 is a process flow diagram of the present invention;

1. kapok/viscose spunlace webs; 2. viscose/wood pulp wet-laid webs; 3. a water stabbing head; 4. a dewatering box; 5. a suspension slurry tank; 6. a drum; 7. a mangle roll; 8. drying the cylinder; 9. a hot air drying room; 10. and (5) cooling the roller.

Detailed Description

Example 1

As shown in figure 1, the super-soft anti-reverse osmosis kapok diaper material is prepared by compounding a surface layer kapok/viscose spunlace fiber web 1 which has larger pore diameter and is beneficial to liquid penetration and is not easy to reverse osmosis and an absorption layer viscose/wood pulp wet fiber web 2 which has smaller pore diameter and can realize quick liquid absorption, wherein the gram weight of the surface layer is 15g/m²The gram weight of the absorption layer is 35g/m²The flexible entanglement stable pore structure has large upper pore diameter and small lower pore diameter, and has large imbibition power, small reverse osmosis power and excellent biological safety.

As shown in fig. 2, the preparation method of the super-soft anti-reverse osmosis kapok diaper material comprises the following steps:

(1) pre-wetting kapok fibers with the mass fraction of 40%, the thickness of 0.9-1.8D and the length of 16-32mm to prevent the kapok from flying off in the subsequent processing process, then mixing the kapok fibers with the mass fraction of 60%, the thickness of 1.5D and the length of 38mm, carding the mixture, performing two-pass spunlacing between a spunlace head 3 and a dewatering box 4 to preliminarily prepare uniform kapok/viscose spunlace fiber webs 1, wherein the pore diameter is large and is beneficial to liquid penetration;

(2) dispersing wood pulp with the mass fraction of 80% into fibriform by using a special pulping device, mixing the fibriform with viscose short fibers with the mass fraction of 20%, the thickness of 1.8D and the length of 10mm to prepare homogeneous mixed pulp, wherein the mass concentration of the mixed pulp is 0.4%, and conveying the pulp in a suspension pulp tank 5 to an inclined net to form a wet viscose/wood pulp net 2 by a pulp feeding pump;

(3) placing the viscose/wood pulp wet-process fiber web 2 and the ceiba/viscose spunlace fiber web 1 up and down, passing between the spunlace head 3 and the dewatering box 4, peeling the viscose/wood pulp wet-process fiber web 2 output by the inclined net from the upper net under the pre-spunlace effect, laying the viscose/wood pulp wet-process fiber web 2 on the ceiba/viscose spunlace fiber web 1 output by the lower net, enabling the viscose/wood pulp wet-process fiber web and the ceiba/viscose spunlace fiber web to enter a lapping curtain as a whole and enter a flat net spunlace area along with the movement of the lapping curtain, keeping the fiber webs vertical to the spunlace head 3, wherein the spunlace pressure is 30MPa, and the number of spunlace tracks is 5; then the spun-laced composite fiber web enters a spun-laced area of a rotary drum 6, the composite fiber web is tightly attached to the rotary drum 6, and is further spun-laced through a spun-laced head 3 on the side surface of the rotary drum 6, wherein the kapok/viscose spun-laced fiber web 1 is an outer layer, the pore enlargement and the spun-laced effect are good, the viscose/wood pulp fiber web 2 is an inner layer, fibers are further entangled, the pore is reduced under the action of pressure, and finally the spun-laced composite fiber web is led away from the curved surface of the rotary drum 6 and is subjected to negative pressure suction and rolling pressure by a mangle roller 7 to remove redundant water;

(4) and (3) drying the composite fiber web for 15s on the surface of a drying cylinder 8 at the temperature of 80 ℃, penetrating the fiber web by hot air at the temperature of 100 ℃ in a hot air drying room 9 to completely evaporate water, and cooling by a cooling roller 10 to obtain the super-soft anti-reverse-seepage kapok diaper material.

Example 2

As shown in figure 1, the super-soft anti-reverse osmosis kapok diaper material is prepared by compounding a surface layer kapok/viscose spunlace fiber web 1 which has larger pore diameter and is beneficial to liquid penetration and is not easy to reverse osmosis and an absorption layer viscose/wood pulp wet fiber web 2 which has smaller pore diameter and can realize quick liquid absorption, wherein the gram weight of the surface layer is 10 g/m²The gram weight of the absorption layer is 40g/m²The flexible entanglement stable pore structure has large upper pore diameter and small lower pore diameter, and has large imbibition power, small reverse osmosis power and excellent biological safety.

(1) pre-wetting kapok fibers with the mass fraction of 50%, the thickness of 0.9-1.8D and the length of 16-32mm to prevent the kapok from flying off in the subsequent processing process, then mixing the kapok fibers with the mass fraction of 50%, the thickness of 2.5D and the length of 51mm, carding the mixture, performing two-pass spunlacing between a spunlace head 3 and a dewatering box 4 to preliminarily prepare uniform kapok/viscose spunlace fiber webs 1, wherein the pore diameter is large and is beneficial to liquid penetration;

(2) dispersing the wood pulp with the mass fraction of 85% into fibriform by using a special pulping device, mixing the fibriform with viscose short fibers with the mass fraction of 15%, the thickness of 2D and the length of 12mm to prepare homogeneous mixed pulp, wherein the mass concentration of the mixed pulp is 0.3%, and conveying the pulp in a suspension pulp tank 5 to an inclined net to form a net by the action of a pulp feeding pump to form a viscose/wood pulp wet-process fiber net 2;

(3) placing the viscose/wood pulp wet-process fiber web 2 and the ceiba/viscose spunlace fiber web 1 up and down, passing between the spunlace head 3 and the dewatering box 4, peeling the viscose/wood pulp wet-process fiber web 2 output by the inclined net from the upper net under the pre-spunlace effect, laying the viscose/wood pulp wet-process fiber web 2 on the ceiba/viscose spunlace fiber web 1 output by the lower net, enabling the viscose/wood pulp wet-process fiber web and the ceiba/viscose spunlace fiber web to enter a lapping curtain as a whole and enter a flat net spunlace area along with the movement of the lapping curtain, keeping the fiber webs vertical to the spunlace head 3, wherein the spunlace pressure is 45MPa, and the number of spunlace tracks is 4; then the spun-laced composite fiber web enters a spun-laced area of a rotary drum 6, the composite fiber web is tightly attached to the rotary drum 6, and is further spun-laced through a spun-laced head 3 on the side surface of the rotary drum 6, wherein the kapok/viscose spun-laced fiber web 1 is an outer layer, the pore enlargement and the spun-laced effect are good, the viscose/wood pulp fiber web 2 is an inner layer, fibers are further entangled, the pore is reduced under the action of pressure, and finally the spun-laced composite fiber web is led away from the curved surface of the rotary drum 6 and is subjected to negative pressure suction and rolling pressure by a mangle roller 7 to remove redundant water;

(4) and (3) drying the composite fiber web for 10s on the surface of a drying cylinder 8 at the temperature of 90 ℃, penetrating the fiber web by using hot air at the temperature of 110 ℃ in a hot air drying room 9 to completely evaporate water, and cooling by using a cooling roller 10 to obtain the super-soft anti-reverse-seepage kapok diaper material.

Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. a super-soft anti-reverse osmosis kapok diaper material is characterized in that: this super-soft anti-reverse osmosis kapok diaper material is made up of the fiber webs of two gradient different apertures, and is compounded through non-woven spunlace technology ; are respectively a surface layer with a larger aperture and an absorbent layer with a smaller aperture, the surface layer is a fiber web prepared from kapok and viscose fibers; the absorbent layer is a fiber web prepared from viscose and wood pulp fibers;

The preparation method of the ultra-soft anti-reverse osmosis kapok diaper material comprises the following steps:

(1) Pre-wet the kapok fibers with a mass fraction of 40%-60%, a thickness of 0.9-2.8D and a length of 16-32mm to prevent the kapok from scattering during subsequent processing, and then mixed with the mass fraction of 40%-60% , Viscose fibers with a thickness of 1.4-2.5D and a length of 38-51mm are mixed and then loosened and carded. After two spunlaces, a uniform kapok/viscose spunlace fiber web is initially obtained, and the larger aperture is conducive to liquid penetration;

(2) Disperse the wood pulp with a mass fraction of 80%-90% into a precipitation fiber with a special beating equipment, and mix it with a sticky pulp with a mass fraction of 10%-20%, a thickness of 1.5-2D and a length of 8-12mm The glue short fibers are mixed and prepared into a homogeneous mixed pulp, the mass concentration of the mixed pulp is 0.2-0.4%, and the pulp is transported to the oblique screen under the action of the sizing pump to form the net to form a viscose/wood pulp wet fiber web;

(3) The viscose/wood pulp wet-laid fiber web output from the oblique net is peeled off from the upper web under the action of pre-spunlace, and is laid on the kapok/viscose spunlace fiber web output from the lower web, and the two enter the web laying curtain as a whole , and enter the spunlace area of the flat web with the movement of the laying curtain, the fiber web and the spunlace head remain vertical, the spunlace pressure is 20-50MPa, and the number of spunlace passages is 4-7; then it enters the drum spunlace area, and the composite The fiber web is tightly attached to the drum, the kapok/viscose spunlace fiber web is the outer layer, and the spunlace effect is good when the pores are enlarged, and the viscose/wood pulp fiber web is the inner layer, and the fibers are further entangled by the pressure. It becomes smaller, and finally the spunlace composite fiber web is drawn away from the surface of the drum, and the excess water is removed by negative pressure suction and liquid roll pressing;

(4) The composite fiber web is heated on the surface of the drying cylinder at 70-100°C for 10-20s, and then hot air at 90-120°C is used to penetrate the fiber web to completely evaporate the water, and the preparation of the ultra-soft anti-reverse osmosis kapok diaper material is completed. .

2. a kind of super soft anti-reverse osmosis kapok diaper material according to claim 1, is characterized in that: described kapok fiber thickness is 0.9-2.8D, length 16-32mm, viscose fiber thickness is 1.4-2.5D , the length is 38mm-51mm.

3. a kind of super-soft anti-reverse osmosis kapok diaper material according to claim 1, is characterized in that: described viscose staple fiber thickness is 1.5-2D, length is 8-12mm, and wood pulp fiber is softwood pulp Meal.

4. a kind of super-soft anti-reverse osmosis kapok diaper material according to claim 1, is characterized in that: described kapok/viscose spunlace fiber web and viscose/wood pulp wet-laid fiber web are first made of flat web and The drum spunlace process is compounded, and then it is dried in a drying cylinder and hot air combined to evaporate excess water and further strengthen the fiber web, which presents a pore structure with a large pore size in the upper part and a small pore size in the lower part.

5. A kind of super soft anti-reverse osmosis kapok diaper material according to claim 1, characterized in that: the gram weight of the surface layer is 10-20g/m2, and the gram weight of the absorbing layer is 30-40g/m2.

6. A kind of ultra-soft anti-reverse osmosis kapok diaper material according to claim 5, characterized in that: the surface layer can also be mixed with other fibers.