WO2021104182A1

WO2021104182A1 - Disposable trouser-type sanitary product

Info

Publication number: WO2021104182A1
Application number: PCT/CN2020/130702
Authority: WO
Inventors: 黄翠玉; 杨鸿勃; 许自淡
Original assignee: 福建恒安集团有限公司
Priority date: 2019-11-25
Filing date: 2020-11-22
Publication date: 2021-06-03
Also published as: CN110946710A; CN110946710B

Abstract

A disposable trouser-type sanitary product, which solves the problems of poor softness and uneven elasticity distribution in the clothing layer of a sanitary product and tight feeling during use, and comprises an outer clothing layer and an absorber disposed in the outer clothing layer. The outer clothing layer is defined to have a longitudinal direction along a length direction and a transverse direction along a width direction. The outer clothing layer is composed of a front waist and abdomen elastic sheet (1), an inelastic crotch sheet (2), and a back waist and hip elastic sheet (3) that are sequentially connected along the longitudinal direction. The front waist and abdomen elastic sheet (1) and the back waist and hip elastic sheet (3) are formed by compounding elastic non-woven fabric (4) and spunbonded non-woven fabric (5) or elastic non-woven fabric (4) and hot air non-woven fabric. The two lateral sides of the front waist and abdomen elastic sheet (1) and of the back waist and hip elastic sheet (3) are fixedly connected to form a structure having a waist opening and two leg openings. The spunbonded non-woven fabric (5) is folded inward and downward at the waist opening towards a body contact side. The longitudinal length of a folding region is 20-50 mm. An elastic material is provided in the folding region.

Description

Disposable pants-type sanitary product

Technical field

The invention relates to the field of sanitary products, in particular to a disposable pants-type sanitary product.

Background technique

Disposable pants-type sanitary products, which generally consist of an outer clothing layer and an absorber arranged in the outer clothing layer. The outer clothing layer generally includes a front clothing layer and a rear clothing layer. One end of the absorber is fixedly connected to the front clothing layer. The other end is fixedly connected with the rear clothing layer, and the lateral sides of the front and rear clothing layers are fixedly welded to form a closed structure with waist openings and leg openings. There are two common structures for the front and rear clothing layers. One is a one-piece structure and the other is a two-piece structure. The clothing layers of these two structures are usually composed of two layers of non-woven composite elastic. The clothing layer is elastic only in the area where the elastic bands are distributed, not the entire clothing layer. The overall elasticity distribution is not even, and the structure with a large number of distributed elastic bands will cause the user to feel "struck". The overall flexibility of the layer is also relatively poor.

Chinese Patent No. 201721925567.5 discloses anti-stretch pants, including a front waist corresponding to the front waist of the human body, a rear waist corresponding to the back waist of the human body, a front crotch corresponding to the front crotch of the human body, and a front waist corresponding to the human body. The diaper body of the back crotch part of the back crotch and the elastic waist circumference respectively arranged between the front waist part and the back waist part are characterized in that the middle connecting section of the anti-strangulation sheet is fixedly connected to the rear waist part, The anti-stripping sheet includes a connecting section in the middle and a buffer section provided at both ends of the connecting section. The buffer section covers the elastic waist circumference, and the length of the buffer section is more than 3/2 of the elastic waist length. The width of the section is greater than the width of the elastic waist. By adding the anti-stroke sheet, the buffer section of the anti-stroke sheet is just set between the elastic waist and the baby's delicate skin, and the area is larger than the elastic waist. In the process of wearing, after the adult manually smooths the anti-stroke sheet, the elastic waist is directly pressed on the buffer section of the anti-stroke sheet, which plays a good buffering effect and prevents obvious red marks on the baby’s delicate skin. When the product is worn, the adult needs to wipe the anti-stroke sheet specially. If the anti-stroke sheet is accidentally flattened, the baby will feel foreign body in the waist area when using it, making it even more uncomfortable to use.

Summary of the invention

Therefore, in view of the above content, the present invention provides a disposable trouser-type sanitary product, which solves the problems of poor softness, uneven elastic distribution of the clothing layer of the sanitary product in the prior art, and a feeling of strangling when used.

In order to achieve the above objective, the present invention is achieved through the following technical solutions: a disposable pants-type sanitary product, comprising an outer clothing layer and an absorber arranged in the outer clothing layer, defining the outer clothing layer to have a longitudinal and a longitudinal direction along the length Along the widthwise direction, the outer clothing layer is composed of a front waist and abdomen elastic sheet, a crotch inelastic sheet, and a back waist hip elastic sheet that are sequentially connected along the longitudinal direction, and the front waist and abdomen elastic sheet and The back waist and hip elastic sheets are all composed of elastic non-woven fabric and spunbonded non-woven fabric or elastic non-woven fabric and hot air non-woven fabric. The side fixed connection forms a structure with a waist opening and two leg openings. The spunbonded non-woven fabric or hot-air non-woven fabric is folded down at the waist opening toward the body contacting side, and the longitudinal length of the folded area is 20-50mm, an elastic material is arranged in the folding area, and the longitudinal length of the front waist and abdomen elastic sheet is 15-50mm shorter than the longitudinal length of the back waist and hip elastic sheet;

The absorbent body includes a liquid-permeable surface layer, a flow guide layer, an upper absorbent paper, a convex absorbent paper, a bottom absorbent paper, and a liquid-impermeable bottom layer which are sequentially stacked from top to bottom. Between the liquid-permeable bottom layer, 3 to 5 elastic bands extending in the longitudinal direction and arranged side by side along the transverse interval are arranged, and the longitudinal length of each elastic band is 1/3-4/5 of the longitudinal length of the absorbent paper of the bottom layer. The horizontal area where the elastic bands are distributed occupies 1/3-4/5 of the horizontal width of the bottom absorbent paper, the convex absorbent paper is arranged in the longitudinal upper half area of the absorbent body, and the upper absorbent paper is provided with a plurality of A cutting line through the convex absorbent paper and the bottom absorbent paper. The liquid-permeable surface layer is provided with diversion grooves that penetrate the diversion layer, the upper absorbent paper, the convex absorbent paper and the bottom absorbent paper. The sexual surface layer, the diversion layer, the upper absorbent paper, the convex absorbent paper and the bottom absorbent paper are connected by the guide groove;

The elastic non-woven fabric has a weight of 30-80gsm, and the elastic non-woven fabric is composed of an upper polypropylene layer, a bottom polypropylene layer and an elastomer arranged between the two. The elastomer is SBS block copolymer. Physical elastomer or polyolefin elastomer, the mass fraction of the upper polypropylene layer and the bottom polypropylene layer is 10-40%, and the mass of the elastomer is 30-80%, and it is fixed by hot rolls The elastic non-woven fabric obtained by bonding has a nip area of 10-15%.

A further improvement is that the cross section of the convex absorbent paper has an e-shaped folded structure.

A further improvement is that the longitudinal length of the front waist and abdomen elastic sheet is 150-230 mm, and the longitudinal length of the back waist and hip elastic sheet is 180-280 mm.

A further improvement is that the number of elastic bands between the bottom absorbent paper and the liquid-impermeable bottom layer is four.

A further improvement is that the elastic material is elastic.

By adopting the aforementioned technical solutions, the beneficial effects of the present invention are:

1. In the disposable trouser-type sanitary product of the present invention, the outer clothing layer is composed of elastic non-woven fabric and spunbonded non-woven fabric or elastic non-woven fabric and hot air non-woven fabric. The elastic non-woven fabric is made of upper polypropylene Layer, the bottom polypropylene layer and the elastomer between the two, the elastomer is SBS block copolymer type elastomer or polyolefin type elastomer, the outer clothing layer adopts this structure instead of the traditional double The layer of non-woven fabric is sandwiched with elastic, which is relatively soft, and the whole is elastic, the elasticity is evenly distributed, and it will not produce a feeling of strangulation during use;

2. The waist area is inner-wrapped, that is, the spunbonded non-woven fabric or hot-air non-woven fabric is folded down at the waist opening to the body contact side, and elastic materials are arranged in the folded area to strengthen the elasticity of the waistband;

3. The longitudinal length of the front waist and abdomen elastic sheet is 15-50mm shorter than the longitudinal length of the back waist and hip elastic sheet, so that the front and back elastic sheets can better fit the human body;

4. Three layers of absorbent paper are used in the absorbent body to match the elastic band. The three layers of absorbent paper are the upper absorbent paper, the convex absorbent paper and the bottom absorbent paper. The layer of absorbent paper is cut to destroy the rigidity of the absorbent paper itself. With the elastic band arranged between the bottom absorbent paper and the liquid-impermeable bottom layer, the resulting softness is improved, and the resulting close-fitting performance is also improved, and, The elastic bands are distributed in 3 to 5 layers, and they are concentrated in the area of 1/3-4/5 of the horizontal width of the bottom absorbent paper. The longitudinal length of the elastic band accounts for 1/3-4/5 of the lower absorbent paper. The elastic bands are distributed in one In a more concentrated and larger area, it is better to achieve personal fit;

5. The liquid-permeable surface layer, diversion layer, upper absorbent paper, convex absorbent paper and bottom absorbent paper are connected by diversion grooves to accelerate the absorption of excrement fluid and guide the direction of the diffusion of excrement fluid;

6. The cross-section of the convex absorbent paper is an e-folded structure, which improves the absorption of liquid.

Description of the drawings

Figure 1 is a schematic structural diagram of an embodiment of the present invention;

Figure 2 is a cross-sectional view of T-T in Figure 1;

Figure 3 is a cross-sectional view from the surface of the absorbent body to the bottom surface of the outer garment in the embodiment of the present invention;

4 is a schematic diagram of the composite structure of the upper absorbent paper, the convex absorbent paper and the bottom absorbent paper in the embodiment of the present invention;

Figure 5 is a cross-sectional view of B-B in Figure 4;

Figure 6 is a cross-sectional view of H-H in Figure 4;

Figure 7 is a schematic diagram of the inner package structure of the spunbonded non-woven fabric in an embodiment of the present invention;

Figure 8 is a schematic diagram of the structure of an elastic non-woven fabric in an embodiment of the present invention;

Figure 9 is a schematic structural diagram of an activation system in an embodiment of the present invention;

Figure 10 is an expanded view of the circumferential side of the gear in the embodiment of the present invention;

11 is a schematic diagram of the meshing connection structure of the gear c1 and the gear c2 in the embodiment of the present invention;

Figure 12 is a flow chart of the preparation method of the embodiment of the present invention.

Detailed ways

The implementation of the present invention will be described in detail below with reference to specific embodiments, so as to fully understand how the present invention applies technical means to solve technical problems and achieve the realization process of technical effects and implement them accordingly.

Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the reagents and products used are also commercially available. The source of the reagents used, the trade name, and those whose components are necessary to be listed are all indicated when they first appear.

Example

1 to 11, a disposable pant-type sanitary napkin includes an outer clothing layer and an absorbent body arranged in the outer clothing layer, defining that the outer clothing layer has a longitudinal direction along the length direction and a transverse direction along the width direction, so The outer clothing layer is composed of a front waist and abdomen elastic sheet 1, an inelastic crotch sheet 2 and a back waist and hip elastic sheet 3 that are sequentially connected along the longitudinal direction, the front waist and abdomen elastic sheet 1 and the back waist and hip The three elastic sheets are all composed of elastic non-woven fabric 4 and spunbonded non-woven fabric 5. The front waist and abdomen elastic sheet 1 and the back waist hip elastic sheet 3 are fixedly connected on both sides to form a waist opening and two The structure of a leg opening, the spunbonded non-woven fabric 5 is folded inwardly and downwardly toward the body contact side at the waist opening, the longitudinal length of the folded region 6 is 30mm, and the folded region 6 is provided with rubber Rib 61, the longitudinal length of the front waist and abdomen elastic sheet 1 is 180mm, the longitudinal length of the back waist and hip elastic sheet 3 is 200mm, the longitudinal length of the front waist and abdomen elastic sheet 1 and the back waist hip elastic sheet 3 It has a certain difference and fits the curve of the human body better; the elastic non-woven fabric 4 gram weight is 50gsm, and the elastic non-woven fabric 4 is composed of an upper polypropylene layer 41, a bottom polypropylene layer 43 and the The mass fraction of the upper polypropylene layer 41 is 15%, the mass fraction of the bottom polypropylene layer 43 is 15%, the mass fraction of the elastomer 42 is 70%, and the mass fraction of the elastomer 42 is SBS block copolymer type elastomer, the three-layer fiber web structure of the elastic non-woven fabric is fixed and bonded by hot rolls, and the area of the nip is 11%. The existence of the polypropylene layer can ensure the elastic non-woven to the greatest extent The stability of the fabric structure avoids the loss of elasticity in the process of winding, slitting and storage.

The absorbent body includes a liquid-permeable surface layer 8, a flow guide layer 9, an upper layer absorbent paper 10, a convex absorbent paper 11, a bottom absorbent paper 17 and a liquid-impermeable bottom layer 14 which are sequentially stacked from top to bottom. The liquid-permeable surface layer 8 is composed of a hydrophilic non-woven fabric 81 and leak-proof partitions 82 arranged on both lateral sides thereof. The leak-proof partitions are provided with elastic bands 83, and the liquid-impermeable bottom layer 14 is made of PE Film composition, the bottom absorbent paper 17 and the liquid-impermeable bottom 14 are provided with four elastic bands 15 extending in the longitudinal direction and arranged side by side at intervals along the transverse direction. The longitudinal length of each of the elastic bands 15 is the bottom absorbent paper 17 2/3 of the longitudinal length, the lateral area where the four elastic bands are distributed accounts for 2/3 of the lateral width of the bottom absorbent paper 17, the convex absorbent paper 11 is arranged in the upper longitudinal region of the absorbent body, the The upper absorbent paper 10 is evenly spaced with cutting lines 12 penetrating the convex absorbent paper 11 and the bottom absorbent paper 17, and the liquid-permeable surface layer 8 is provided with a penetrating diversion layer 9, upper absorbent paper 10, and convex absorbent paper. The guiding groove 16 of the paper 11 and the bottom absorbent paper 17, the liquid-permeable surface layer 8, the guiding layer 9, the upper absorbent paper 10, the convex absorbent paper 11 and the bottom absorbent paper 17 are connected by the guiding groove 16 The cross section of the convex absorbent paper 11 is an e-folded structure, that is, the convex absorbent paper is folded inward in the transverse direction and then folded inward again in the transverse direction, and folded twice in the same direction, formed It has a thick structure layer relative to the upper absorbent paper 10 and the bottom absorbent paper 17.

In addition, the outer surface of the back waist-hip elastic sheet of the outer clothing layer of this product is also provided with a discarding sticker 18, which is glued and arranged on the outer surface of the back waist-hip elastic sheet.

Specifically, the preparation method of the disposable pants-type sanitary product of the present invention is:

It includes preparing an outer clothing layer, preparing an absorbent body, and fixing the absorbent body on the outer clothing layer and welding it into a trouser-shaped structure and cutting into individual products. The preparation of the outer clothing layer includes the following steps:

a. Prepare an elastic non-woven fabric, which includes:

a1. Add a layer of elastomer on the polypropylene layer;

a2. Add a polypropylene layer to the elastomer described in step a1 and fix it by hot rolling to form an elastic non-woven fabric with a three-layer fiber network structure;

The elastic non-woven fabric weighs 50gsm and is manufactured by spunbonded non-woven fabric technology. It has a three-layer structure: PP layer + elastomer + PP layer. Select SBS elastomer as the elastomer. The mass fraction of the PP layer accounts for 30%, the mass fraction of the elastic layer accounts for 70%, and the three-layer fiber web is finally fixed and bonded by a hot roll. Rolling point area accounts for 11%.

b. Send the elastic non-woven fabric prepared in step a to the activation system for activation processing;

The activation system includes input driving roller a, two heating roller groups b, traction driving roller e, activation gear c, output driving roller d, and the input driving roller a, heating roller group b, traction driving roller e, activation The gear c and the output drive roller d are respectively connected to the power output end in transmission connection, and the activation process is to sequentially pass the elastic non-woven fabric through the input drive roller a, each of the heating roller groups b, the traction drive roller e, and the activation gear c. The output drive roller d is activated; the linear velocity of the output drive roller d is twice the linear velocity of the input drive roller a, and the linear velocity of the traction drive roller e is consistent with the linear velocity of the input drive roller a. The heating roller group b is composed of two heating rollers. The rotation of each heating roller is opposite. The front and back sides of the elastic non-woven fabric are in contact with the heating rollers. The heating temperature of each heating roller is 48°C. The included angle between the non-woven fabric and each heating roller in the circumferential direction is 180°. The activation gear is composed of a pair of gears, namely, a c1 gear and a c2 gear, and flat teeth are evenly spaced on the circumferential side of each gear. c3 and the flat teeth on the pair of gears are staggered during operation;

c. The elastic non-woven fabric obtained in step b is slit in the longitudinal direction and then combined with the spunbonded non-woven fabric by hot melt adhesive into one body, and each of the elastic non-woven fabrics after slitting is located in the spunbonded non-woven fabric. On both sides of the longitudinal direction and the outer clothing layer made therefrom;

The preparation of the absorbent body includes the following steps:

1) Preparation of liquid-permeable surface layer: a layer of hydrophobic non-woven fabric is compounded online on both lateral sides of the hydrophilic non-woven fabric;

2) Preparation of the diversion layer;

3) Preparation of absorbent core: preparing upper absorbent paper, preparing convex absorbent paper, preparing bottom absorbent paper, and combining the aforementioned upper absorbent paper, convex absorbent paper and bottom absorbent paper into one body and performing cutting line processing. The specific steps of the thread treatment are: stack the upper absorbent paper, the convex absorbent paper and the bottom absorbent paper together, and cut the surface of the upper absorbent paper with a cutter, and the cutting line penetrates from the upper absorbent paper to the bottom absorbent paper;

4) Preparation of elastic bands: 4 elastic bands, the longitudinal length of each elastic band is 2/3 of the longitudinal length of the bottom absorbent paper, and the lateral area where the elastic bands are distributed occupies 2/of the transverse width of the bottom absorbent paper 3;

5) Preparation of liquid-impermeable bottom layer: on-line spray glue on the bottom layer of the PE film to compound a layer of non-woven fabric;

6) The prepared elastic band is first combined with the prepared liquid-impermeable bottom layer, in which the elastic band is set on the PE film, and then the prepared absorbent core, diversion layer, and liquid-permeable layer are sequentially laminated on it. The absorbent surface layer is made into the absorbent body, and then the absorbent body is cut into individual items and then rotated 90° and transferred to the next process on-line;

The outer clothing layer is also internally wrapped, and the specific processing steps are: after the spunbonded non-woven fabric in step c is combined with the slit elastic non-woven fabric, spray the spunbonded non-woven fabric at 30 mm at both longitudinal ends of the spunbonded non-woven fabric. The elastic band is then folded down and inward on the area where the elastic band is sprayed to form an inner envelope area.

Wherein, in the present invention, the longitudinal length of the folding area is 20-50mm, the longitudinal length of the front waist and abdomen elastic sheet is 15-50mm shorter than the longitudinal length of the back waist hip elastic sheet; the longitudinal length of each elastic band is the bottom water absorption 1/3-4/5 of the longitudinal length of the paper, the lateral area of the elastic distribution accounts for 1/3-4/5 of the lateral width of the bottom absorbent paper, and the elastic non-woven fabric has a grammage of 30-80gsm, The included angle between the elastic non-woven fabric and each heating roller contact distribution along the circumferential direction is greater than 120°, and the objective of the present invention can be achieved within the above-mentioned parameter range.

In addition, the pants-type sanitary product of the present invention may be pants-type diapers, pants-type adult diapers, etc., in addition to the pants-type sanitary napkins exemplified in the embodiments.

The front waist and abdomen elastic sheet and the back waist hip elastic sheet of the present invention can also be composited by elastic non-woven fabric and hot-air non-woven fabric.

The elastic non-woven fabric of the present invention can be cut in half before activation, and then activated after slitting. After the activation, the spunbonded non-woven fabric or the hot-air non-woven fabric can be compounded. The process flow chart can refer to FIG. 12.

After the elastic non-woven fabric of the present invention is prepared, it needs to be wound up for standby, and then sent to the production line of sanitary products for use.

The above records are only examples using the content of this creation technology. Any modification or change made by this creation by a person familiar with this art belongs to the scope of the patent claims of this creation, and is not limited to those disclosed in the examples.

Claims

A disposable trouser-type sanitary product, comprising an outer clothing layer and an absorber arranged in the outer clothing layer, defining that the outer clothing layer has a longitudinal direction along the length direction and a transverse direction along the width direction, and is characterized in that: the outer clothing layer The layer is composed of a front waist and abdomen elastic sheet, a crotch inelastic sheet, and a back waist and hip elastic sheet that are sequentially connected along the longitudinal direction. The front waist and abdomen elastic sheet and the back waist and hip elastic sheet are all made of elastic non-woven Fabric and spunbond non-woven fabric or elastic non-woven fabric and hot-air non-woven fabric are composited. The front waist and abdomen elastic sheet and the back waist hip elastic sheet are fixedly connected on both lateral sides to form a waist opening and two legs The structure of the opening, the spunbonded non-woven fabric or the hot-air non-woven fabric is folded inwardly and downwardly toward the body contacting side at the waist opening, the longitudinal length of the folded region is 20-50mm, and the folded region is provided An elastic material, the longitudinal length of the front waist and abdomen elastic sheet is 15-50mm shorter than the longitudinal length of the back waist and hip elastic sheet;

The absorbent body includes a liquid-permeable surface layer, a flow guide layer, an upper absorbent paper, a convex absorbent paper, a bottom absorbent paper, and a liquid-impermeable bottom layer which are sequentially stacked from top to bottom. Between the liquid-permeable bottom layer, 3 to 5 elastic bands extending in the longitudinal direction and arranged side by side along the transverse interval are arranged, and the longitudinal length of each elastic band is 1/3-4/5 of the longitudinal length of the absorbent paper of the bottom layer. The horizontal area where the elastic bands are distributed occupies 1/3-4/5 of the horizontal width of the bottom absorbent paper, the convex absorbent paper is arranged in the longitudinal upper half area of the absorbent body, and the upper absorbent paper is provided with a plurality of A cutting line through the convex absorbent paper and the bottom absorbent paper. The liquid-permeable surface layer is provided with diversion grooves that penetrate the diversion layer, the upper absorbent paper, the convex absorbent paper and the bottom absorbent paper. The sexual surface layer, the diversion layer, the upper absorbent paper, the convex absorbent paper and the bottom absorbent paper are connected by the guide groove;

The elastic non-woven fabric has a weight of 30-80gsm, and the elastic non-woven fabric is composed of an upper polypropylene layer, a bottom polypropylene layer and an elastomer arranged between the two. The elastomer is SBS block copolymer. Physical elastomer or polyolefin elastomer, the mass fraction of the upper polypropylene layer and the bottom polypropylene layer is 10-40%, and the mass of the elastomer is 30-80%, and it is fixed by hot rolls The elastic non-woven fabric obtained by bonding has a nip area of 10-15%.
The disposable trouser-type sanitary product according to claim 1, wherein the cross section of the convex absorbent paper is an e-folded structure.
A disposable trouser-type sanitary product according to claim 1 or 2, wherein the longitudinal length of the front waist and abdomen elastic sheet is 150-230mm, and the longitudinal length of the back waist and hip elastic sheet is 180-280mm.
The disposable trouser-type sanitary product according to claim 1 or 2, characterized in that there are four elastic bands between the bottom absorbent paper and the liquid-impermeable bottom layer.
The disposable trouser-type sanitary product according to claim 1, wherein the elastic material is elastic.