CN115919551A - Disposable absorbent article - Google Patents

Abstract

The invention provides a disposable absorbent article (100), which comprises a front waistline part (110), a back waistline part (120), a crotch part (130) and an absorbent core (132), wherein the absorbent core is positioned in the crotch part and respectively connected with the front waistline part and the back waistline part, two side edges (111, 112) of the front waistline part are respectively jointed with two side edges (121, 122) of the back waistline part to form a waistline opening and two leg openings, the front waistline part and the back waistline part comprise elastic non-woven fabric layers (115, 125) which can elastically stretch along the transverse direction, each elastic non-woven fabric layer comprises a non-woven fabric base material and a plurality of thread-shaped elastic bodies (138) which extend along the transverse direction and are separated from each other along the longitudinal direction, and the thread-shaped elastic bodies are attached to the non-woven fabric base material in a sewing thread mode. The absorbent article provides improved comfort.

Description

Disposable Absorbent Articles

technical field

The present invention relates to a disposable absorbent article.

Background technique

"Absorbent article" generally refers to a disposable article adapted to conform to the skin of a user to absorb and contain body exudates, such as diapers, urine absorbent pads, panty liners, sanitary napkins, and the like. Disposable pant-type absorbent articles include pant-type paper diapers, pant-type sanitary napkins, and the like.

Existing disposable pants-type absorbent articles usually include an outer layer of non-woven fabric, an inner layer of non-woven fabric, and an elastic body sandwiched between the two layers of non-woven fabrics and extending along the width of the article at the waist circumference. Gives stretchable properties along the width of the item. For example title is called " short pants type disposable diaper ", publication number is the Chinese patent of CN1993094B, title is called " multifunctional training clothing ", publication number is the Chinese patent application of CN101180021A. The manufacturing process of the girdle usually includes the rubber coating process of the elastic body, applying hot melt glue to the elastic body continuously or intermittently to fix it between the outer non-woven fabric and the inner non-woven fabric. Due to the coating of a large amount of hot melt adhesive, the resilience performance of the elastomer is weakened, and the softness of the article will also be reduced.

Contents of the invention

It is an object of the present invention to provide an absorbent article providing improved comfort.

To this end, the present invention provides a disposable absorbent article, comprising a front waist portion, a rear waist portion, a crotch, and an absorbent core located in the crotch and respectively connected to the front waist part and the rear waist part, the two side edges of the front waist part are respectively joined with the two side edges of the back waist part to form a waist opening and two leg openings, the front waist part and the back waist part include An elastic non-woven fabric layer that can be elastically stretched in the transverse direction, the elastic non-woven fabric layer includes a non-woven fabric substrate and a plurality of linear elastic bodies extending in the transverse direction and spaced apart from each other in the longitudinal direction, the plurality of lines The elastic body is attached to the non-woven fabric substrate in the form of sewing thread. The stitches of the linear elastic body on the non-woven fabric substrate are basically straight lines, such as but not limited to the No. 101 single-thread chain stitch, the No. 301 single-needle flat seam stitch, and the No. Chainstitch stitches. Parallel linear stitches of the elastomer endow the elastic nonwoven layer with elastic shrinkage properties in the transverse direction. When using multi-thread stitches, there is at least one elastic body in the plurality of sewing threads of a stitch. The elastic non-woven fabric made of elastomer sewing thread in disposable absorbent articles reduces the use of hot melt adhesives, weakens the adverse effect on the elastic resilience performance, and makes the front and rear waistlines of the article softer comfortable.

According to an optional embodiment of the present invention, the elastic non-woven fabric layer of the front waistline and the rear waistline of the disposable absorbent article is located on the clothing side, and the front waistline and the rear waistline also include a non-woven fabric layer located on the skin side .

According to an optional embodiment of the present invention, the disposable absorbent article further includes a garment-side non-woven fabric layer covering the front waist portion, the rear waist portion, and the crotch portion, and the elastic parts of the front waist portion and the rear waist portion The non-woven layer is on the skin side.

According to an optional embodiment of the present invention, the front waist portion and the rear waist portion of the disposable absorbent article further include a clothing-side non-woven fabric layer and a skin-side non-woven fabric layer, and the elastic non-woven fabric layer is sandwiched between Between the non-woven fabric layer on the clothing side and the non-woven fabric layer on the skin side.

In various embodiments, the multiple layers of the front waist portion and the rear waist portion can be laminated and bonded together in any suitable way, such as but not limited to bonding, thermocompression, ultrasonic welding, and combinations of the aforementioned bonding methods.

According to an optional embodiment of the present invention, the front and rear ends of the absorbent core of the disposable absorbent article are joined to the inner sides of the multilayer composite nonwoven fabrics of the front waistline and the rear waistline, respectively.

According to an optional embodiment of the present invention, the front and rear ends of the absorbent core of the disposable absorbent article are respectively joined between the multi-layer nonwoven fabrics of the front waistline and the rear waistline.

According to an alternative embodiment of the present invention, the front end of the absorbent core of the disposable absorbent article is joined to the inner side of the multi-layer composite nonwoven fabric of the front waist portion, and the rear end of the absorbent core is joined to the multiple layers of the rear waist portion. Between layers of non-woven fabric.

According to an alternative embodiment of the present invention, the front end of the absorbent core of the disposable absorbent article is bonded between the layers of nonwoven fabrics in the front waist portion, and the rear end of the absorbent core is bonded to the layers of nonwoven fabric in the rear waist portion. The inner side of the composite non-woven fabric.

According to an optional embodiment of the present invention, the denier of the linear elastic body on the elastic nonwoven fabric in the disposable absorbent article is in the range of 10 to 420 denier (Denier), and the longitudinal interval is in the range of 1.5 to 10 mm, The spacing between adjacent sewing perforations in the ultimate stretch state is in the range of 1.0 to 20 mm. The width of the elastic nonwoven fabric in the state of ultimate stretch corresponds to the width of the nonwoven fabric substrate in an unshrunk state when no linear elastic body is attached thereto.

According to an optional embodiment of the present invention, the stitches of the linear elastic body on the elastic non-woven fabric in the disposable absorbent article on the non-woven fabric substrate are selected from one of the following: 101 in the ISO4915 International Stitch Standard for Sewing No., No. 301, No. 401.

According to an optional embodiment of the present invention, the ratio of the width of the elastic non-woven fabric layer in the elastic non-woven fabric layer along the extending direction of the linear elastic body to the width of the unstretched state is between 1.5 and 5.0. The width of the elastic nonwoven fabric in the state of ultimate stretch corresponds to the width of the nonwoven fabric substrate in an unshrunk state when no linear elastic body is attached thereto.

According to an optional embodiment of the present invention, the ratio of the width of the waist opening of the disposable absorbent article in the transverse direction in the state of ultimate stretch to the width in the state of unstretch is between 1.5 and 4.0. The width of the waist opening in the state of ultimate stretch substantially corresponds to the width of the state in which the nonwoven fabric substrate is not shrunk when the linear elastic body is not attached.

Description of drawings

Other features and advantages of the present invention will be better understood through the following preferred embodiments described in detail in conjunction with the accompanying drawings, in which the same reference numerals represent the same or similar components. It should be understood that the accompanying drawings are not only used for explaining the present invention, but also help to define the present invention when necessary.

FIG. 1 is a schematic diagram of a pants-type diaper 100;

FIG. 2 is a schematic plan view of the underpants-type diaper 100 unfolded in a stretched state;

FIG. 3 is a schematic diagram of a pants-type diaper 200;

FIG. 4 is a schematic plan view of the underpants-type diaper 200 unfolded in a stretched state.

Detailed ways

The making and using of the embodiments are discussed in detail below. It should be understood, however, that the specific embodiments discussed are merely illustrative of specific ways to make and use the invention and do not limit the scope of the invention.

In this specification, when describing the structural position of each component, directional expressions such as "upper", "lower", "top" and "bottom" are not absolute, but relative. These directional expressions are appropriate when the respective parts are arranged as shown in the drawings, but should be changed accordingly when the positions of the respective parts in the drawings are changed.

It can be understood that the "width" direction, "transverse direction" and the X direction in the accompanying drawings correspond to each other, the "length" direction, "longitudinal" and the Y direction in the accompanying drawings correspond to each other, and the "thickness" direction and the X direction in the accompanying drawings correspond to each other. The Z directions correspond to each other. "Skin side" or "inner side" refers to the side facing or closer to the wearer's skin in the thickness direction when the absorbent article is worn, and "non-skin side" or "clothing side" refers to the side of the absorbent article The side of the garment that is turned away from the wearer's skin or facing outward when worn.

1 and 2 show a pants-type diaper 100 . The diaper 100 includes a front waist portion 110, a rear waist portion 120, and a crotch portion 130, which respectively contact the front abdomen, rear abdomen, and crotch of the wearer when worn. The absorbent core 132 is located in the crotch and connects the front waist portion 110 and the rear waist portion 120, respectively. The two side edges 111 , 112 of the front waistline are joined with the two side edges 121 , 122 of the back waistline respectively to form a waist opening 114 and leg openings 133 , 134 .

The front waist portion 110 includes a skin-side nonwoven fabric layer 115 and a garment-side elastic nonwoven fabric layer 116 . The rear waist portion 120 includes a skin-side nonwoven fabric layer 125 and a clothing-side elastic nonwoven fabric layer 126 . The front end part of the absorptive core 132 is interposed between the nonwoven fabric layers 115 and 116, and the rear end part is interposed between the nonwoven fabric layers 125 and 126. The elastic non-woven fabric layers 116, 126 are combined with the non-woven fabric layers 115, 125 respectively by any suitable means, such as but not limited to bonding, thermocompression, ultrasonic welding, and the like. The elastic non-woven fabric layers 116 and 126 can elastically expand and contract in the transverse direction, so as to provide elastic expansion and contraction in the transverse direction for the front waist portion 110 and the rear waist portion 120 .

The elastic non-woven fabric layer 116, 126 comprises a non-woven fabric substrate and a plurality of linear elastic bodies 138 extending transversely and spaced apart from each other in the longitudinal direction. The linear elastic bodies 138 are attached to the non-woven fabric in the form of sewing threads. Substrate. The stitches of the linear elastic body 138 on the non-woven substrate are basically straight lines, such as but not limited to the No. 101 single-thread chain stitch stitch, No. 301 single-needle flat stitch stitch, and No. 401 stitch stitch in the ISO4915 sewing international stitch standard. Double chainstitch stitching. The parallel linear stitch elastics impart elastically shrinkable properties to the elastic nonwoven layer 116, 126 in the transverse direction. When using multi-thread stitches, there is at least one elastic body in the plurality of sewing threads of a stitch.

The diaper 100 may also include several other components not shown in the figure, such as but not limited to waist elastics, leg elastics, anti-side leakage stand-up partitions, and the like.

3 and 4 show a pants-type diaper 200 . The diaper 200 includes a front waist portion 210, a rear waist portion 220, and a crotch portion 230, and the absorbent core 232 is located in the crotch portion. The two side edges 211 , 212 of the front waistline are joined with the two side edges 221 , 222 of the back waistline respectively to form a waist opening 214 and leg openings 233 , 234 .

The garment-side nonwoven fabric layer 215 covers the entirety of the front waist portion 210 , the rear waist portion 220 , and the crotch portion 230 . The front waist portion 210 further includes a skin-side elastic nonwoven fabric layer 216 , and the rear waistline portion 220 further includes a skin-side elastic nonwoven fabric layer 226 . The front end part of the absorptive core 232 is interposed between the nonwoven fabric layers 216 and 215, and the rear end part is interposed between the nonwoven fabric layers 226 and 215. The elastic non-woven fabric layers 216, 226 are bonded to the non-woven fabric layer 215 by any suitable means such as but not limited to bonding, thermocompression, ultrasonic welding, and the like. The elastic non-woven fabric layers 216 and 226 can elastically expand and contract in the transverse direction, so as to provide elastic expansion and contraction in the transverse direction for the front waist portion 210 and the rear waist portion 220 .

The elastic nonwoven layer 216, 226 includes a nonwoven substrate and a plurality of elastic stitching threads 238 extending in the transverse direction and spaced apart from each other in the longitudinal direction. The stitches of the elastic sewing thread 238 on the non-woven substrate are basically straight lines, such as but not limited to No. 101 single-thread chain stitches, No. 301 single-needle flat stitches, and No. Chainstitch stitches. The parallel linear stitches of the elastomer impart the elastic nonwoven layer 216, 226 with the characteristic of elastically shrinking in the transverse direction. When using multi-thread stitches, there is at least one elastic body in the plurality of sewing threads of a stitch.

The diaper 200 may also include several other components not shown in the figure, such as but not limited to waist elastics, leg elastics, anti-side leakage stand-up partitions, and the like.

The technical contents and technical characteristics of the present invention have been disclosed above, but it can be understood that under the creative idea of the present invention, those skilled in the art can make various changes and improvements to the above-mentioned disclosed concept, but all belong to the protection scope of the present invention . Although only examples of disposable diapers and absorbent pads are shown in connection with the figures, this is not limiting. The present invention also encompasses infant diapers, panty liners, sanitary napkins, pant napkins, and any other type of disposable absorbent article adapted to conform to the wearer's skin to absorb and contain body exudates.

The description of the above embodiments is illustrative rather than restrictive, and the protection scope of the present invention is determined by the claims.

Claims (8)

1. Disposable absorbent article comprising a front waist portion, a rear waist portion, a crotch portion, an absorbent core located in the crotch portion and connecting the front waist portion and the rear waist portion respectively , the two side edges of the front waist part are respectively joined with the two side edges of the back waist part to form a waist opening and two leg openings, It is characterized in that the front waist part and the rear waist part include elastic non-woven fabric layers that can stretch in the transverse direction, and the elastic non-woven fabric layers include non-woven fabric substrates and a plurality of strips that extend transversely and are spaced apart from each other in the longitudinal direction. The linear elastic body is opened, and the plurality of linear elastic bodies are attached to the non-woven fabric substrate in the form of sewing threads. 2 . The disposable absorbent article according to claim 1 , wherein the elastic nonwoven fabric layer is located on the clothing side, and the front and rear waistline sections further include a nonwoven fabric layer located on the skin side. 3. The disposable absorbent article according to claim 1, further comprising a garment-side nonwoven fabric layer covering the front waist portion, the rear waist portion, and the crotch portion, and the front waist portion, the rear waist portion The elastic nonwoven layer of the portion is located on the skin side. 4. The disposable absorbent article according to claim 1, wherein the front waist portion and the rear waist portion further include a clothing-side non-woven fabric layer and a skin-side non-woven fabric layer, and the elastic non-woven fabric A layer is interposed between the garment-side non-woven fabric layer and the skin-side non-woven fabric layer. 5. The disposable absorbent article according to any one of claims 1 to 4, wherein the denier of the linear elastic body is in the range of 10 to 420 denier, and the longitudinal interval is in the range of 1.5 to 10 mm Within the limit stretch state, the spacing between adjacent sewing perforations is in the range of 1.0 to 20 mm. 6. The disposable absorbent article according to any one of claims 1 to 4, wherein the stitches of the linear elastic body on the non-woven fabric substrate are selected from one of the following: ISO4915 Sewing No. 101, No. 301 and No. 401 in the international stitch standard. 7. The disposable absorbent article according to any one of claims 1 to 4, characterized in that, the width of the elastic non-woven fabric layer in a state of ultimate stretch along the extending direction of the linear elastic body is different from that of The width ratio in stretched state is between 1.5 and 5.0. 8. The disposable absorbent article according to any one of claims 1 to 4, characterized in that, the ratio of the width of the waist opening in the transverse direction in the state of ultimate stretch to the width in the state of unstretch is 1.5 to 4.0.

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