ABSORBENT ARTICLE HAVING INTEGRAL STRETCH PANELS AND METHODS FOR MAKING THE SAME
Absorbent articles suitable for use as training pants or other hygiene products are provided. The absorbent articles include a chassis having a contiguous front section, a rear section, and a crotch section extending between the front section and the rear section. Edges of the front section connect to edges of the rear section to define a waist opening. The chassis includes a substrate layer having pairs of film sections attached to the front section and the rear section. Each film section is spaced apart from one another and are stretchable in at least a direction along the waist opening. Products according to the invention may provide any of several benefits, including at least one of improved fit, comfort, manufacturability, and visual appearance.
1 . An absorbent article comprising:
a chassis having a contiguous front section, a contiguous rear section, and a crotch section extending between the front section and the rear section, edges of the front section being connected to edges of the rear section to define a waist opening,
wherein the chassis comprises a substrate layer having a pair of film sections attached to each of the front section and the rear section, the film sections of each of the pairs being spaced apart from one another and being stretchable in at least a direction along the waist opening.
2 . The device of claim 1 , wherein the chassis further comprises an absorbent core interposed between the substrate layer and a liquid permeable topsheet, the absorbent core configured to receive liquid through the topsheet.
3 . The device of claim 2 , wherein the chassis further comprises an acquisition layer interposed between the topsheet and the absorbent core, the acquisition layer configured to receive liquid through the topsheet and direct liquid to the absorbent core.
4 . The device of claim 2 , wherein the chassis further comprises a liquid impermeable barrier layer interposed between the absorbent core and substrate layer.
5 . The device of claim 1 , wherein the substrate layer has a substantially hour-glass configuration.
6 . The device of claim 1 , wherein the substrate layer is made of a non-woven material.
7 . The device of claim 1 , wherein each film section is nonporous.
8 . The device of claim 1 , wherein each film section is stretchable in a direction transverse to the waist opening.
9 . The device of claim 1 , wherein each film section is stretchable in a machine direction and in a cross-direction transverse to the machine direction.
10 . A method of applying a stretchable layer of an absorbent article comprising the steps of:
advancing a substrate of the absorbent article in a machine direction;
applying a layer of adhesive to the substrate in a slot coating corresponding to a shape of the stretchable layer;
orienting the stretchable layer such that it is stretchable in the machine direction; and
attaching the stretchable layer to the substrate by means of the adhesive.
11 . The method of claim 10 , further comprising stretching the stretchable layer in a stretched conditioned such that the stretchable layer corresponds to a shape of the layer of adhesive.
12 . The method of claim 11 , wherein the step of stretching comprises stretching the stretchable layer in the machine direction and in a cross direction traverse to the machine direction.
13 . A method of forming an absorbent article comprising the steps of:
providing a substrate layer of a chassis having a contiguous front section, a contiguous rear section, and a crotch section extending between the front section and the rear section;
attaching a pair of film sections to each of the front section and the rear section such that the film sections of each of the pairs is spaced apart from one another and stretchable in at least a direction along the waist opening; and
connecting edges of the front section to edges of the rear section to define a waist opening.
14 . The method of claim 13 , further comprising the step of advancing a substrate of the absorbent article in a machine direction.
15 . The method of claim 13 , wherein the attaching step comprises at least one step consisting of adhesive bonding, heating sealing, or ultrasonic bonding the pair of film sections to each of the front section and the rear section.
16 . The method of claim 13 , further comprising the step of applying a layer of adhesive to the substrate in a slot coating corresponding to a shape of the stretchable layer.
17 . The method of claim 13 , further comprising the step of orienting the stretchable layer such that it is stretchable in the machine direction.