JPWO2021263066A5 - - Google Patents

Description

In non-limiting examples, the ratio of Wd to Y is 0.45 or less, or 0.375 or less, or 0.27 or less, or 0.25 or less, or 0.2 or less, or from about 0.05 to about 0.45, or from about 0.1 to about 0.4, with each range recited in increments of 0.05 within this range. Additionally or alternatively, the ratio of Wd to X is 0.9 or less, or 0.4 or less, or from about 0.05 to about 0.9, or from 0.2 to about 0.4, with each range recited in increments of 0.05 within this range. The ratio of Wd to X may be 0.55 or less.

Referring to FIG. 3, the laminate 10 may further include a reinforcing member 50 disposed between the elastomeric material and at least one of the nonwoven layers. The reinforcing member helps provide strength to the laminate. Non-limiting examples of reinforcing members include additional bonds 52, such as adhesive, heat or pressure bonds, additional substrate layers 54, including separate layers of material and/or folded materials, and combinations thereof. The additional substrate layer 54 may include a nonwoven, an elastomeric material, or combinations thereof. The additional substrate layer 54 may include the same material as the first nonwoven, the second nonwoven and/or the elastomeric layer, or the additional substrate layer 54 may include a different material than any of the aforementioned layers.

Claims (13)

An absorbent article (100),
a chassis (120) comprising a topsheet (124), a backsheet (126), and an absorbent core (128) disposed between the topsheet and the backsheet;
A lug (130) joined to the chassis,
A laminate (10) comprising a first nonwoven (12) and a second nonwoven (16) and an elastomeric material (14) sandwiched between the first nonwoven and the second nonwoven, the laminate further comprising a plurality of ultrasonic bonds (31) joining the nonwoven layers via the elastomeric material , wherein:
the elastomeric material has a maximum dimension Y in a direction of extension;
the elastomeric material defines a primary region (18) including an elastic region (32) and one or more inextensible zones (34);
the elastic region has a maximum dimension X in the direction of stretch, and the one or more inextensible zones have an aggregate lateral width of Wd;
The ratio of Wd to Y is 0.3 or less;
and an ear portion (130) ,
The stretch direction includes a lateral direction of the absorbent article,
Wd is 13 mm or less,
An absorbent article , wherein the ratio of Wd to X is 0.55 or less . 2. The absorbent article of claim 1 , wherein Wd is 6.5 mm or less. The one or more non-stretch zones include
a first inextensible zone (34a) disposed laterally inward of said elastic region and having a width Wd1;
The absorbent article according to claim 1 or 2 , further comprising a second non-stretchable zone (34b) disposed laterally outward of said elastic region and having a lateral width Wd2, said Wd1 being different from Wd2. The absorbent article of claim 3 , wherein Wd2 is greater than Wd1. 5. The absorbent article of claim 4 , wherein the ratio of Wd2 to Wd1 is at least 2. The absorbent article according to any one of claims 1 to 5 , wherein the laminate further comprises a reinforcing portion (50) disposed between the elastomeric material and the first nonwoven fabric or the second nonwoven fabric. The absorbent article according to any one of claims 1 to 6 , wherein the elastomeric material comprises a film (15). A method for assembling a laminate of absorbent articles according to any one of claims 1 to 7 , comprising the steps of:
providing a first substrate (202) and a second substrate (210), each of the first substrate (204, 212) and the second substrate (210) having an opposing first surface (204, 212) and an opposing second surface (206, 214) and defining a width in a transverse direction;
wrapping the first surface of the first substrate onto a peripheral surface (404) of an anvil (402);
advancing a resilient material (208) into a spreader mechanism (412), said spreader mechanism including an engagement portion (419);
stretching the elastic material in the transverse direction to a first elongation (E 1 ) in the spreader mechanism;
advancing the resilient material from the spreader mechanism to the anvil, the anvil comprising an active vacuum zone (415) having a maximum width Wv in the transverse direction, the maximum width being divided into a first portion (452) and a second portion (454), the first portion being in overlapping relationship with and disposed inside the engagement portion in the transverse direction, the first portion having a width VZi in the transverse direction and the second portion having a width VZo in the transverse direction, VZi being greater than VZo;
positioning the elastic material in contact with the second surface of the first substrate on the anvil;
advancing the second substrate to position the first surface of the second substrate in contact with the elastic material and position the second surface of the first substrate on the anvil;
and ultrasonically bonding the first substrate to the second substrate with the elastic material positioned between the first substrate and the second substrate. The method of claim 8 , wherein the engagement portion comprises one or more radially protruding nubs (428). 10. The method of claim 8 or 9 , wherein the anvil comprises a plurality of apertures (414) in fluid communication with a vacuum source in the working vacuum zone. The method according to any one of claims 8 to 10 , wherein the ratio of VZi to VZo is greater than 5. 12. The method of claim 8, wherein the anvil comprises a configurable tube (460) in fluid communication with an outer surface of the anvil via a radially extending connector ( 466 ), the method further comprising using the configurable tube to provide the operating vacuum zone. 13. The method of claim 8 , wherein the anvil has a maximum width Wa in the transverse direction, and the maximum width Wv of the operating vacuum zone is less than or equal to 20% of the maximum width Wa of the anvil.