Stretch laminate having novel adhesive pattern and methods of making the same

Patent metadata

Field	Value
Publication number	US-9452586-B2
Application number	US-201514624940-A
Country	US
Kind code	B2
Filing date	Feb 18, 2015
Priority date	Dec 8, 2004
Publication date	Sep 27, 2016
Grant date	Sep 27, 2016

Abstract

A stretch laminate having a first nonwoven material, a second nonwoven material, an elastic film. The elastic film has a first longitudinal side edge and a second longitudinal side edge. The stretch laminate further has a first plane of adhesive having differing amounts of adhesive as measured laterally within the stretch laminate. The differing amounts of adhesive being controllable. The first plane of adhesive being interposed between the first nonwoven material and the elastic film. The stretch laminate further has a second plane of adhesive having differing amounts of adhesive as measured laterally within the stretch laminate. The differing amounts of adhesive being controllable. The second plane of adhesive being interposed between the second nonwoven material and the elastic film. Each of the above elements are substantially laminated together to form a laminate. The laminate is activated to form the stretch laminate.

First claim

What is claimed is:

1. A stretch laminate comprising:
a first nonwoven material;
a second nonwoven material;
an elastic film, said elastic film being interposed between said first and second nonwoven materials, said elastic film having a first longitudinal side edge and a second longitudinal side edge, wherein portions of said first and second nonwoven materials extend laterally outboard of said first and second longitudinal side edges of said elastic film;
a first plane of adhesive having differing amounts of adhesive as measured laterally within the stretch laminate, said first plane of adhesive being interposed between said first nonwoven material and said elastic film;
a second plane of adhesive having differing amounts of adhesive as measured laterally within the stretch laminate, said second plane of adhesive being interposed between said second nonwoven material and said elastic film;
wherein at least one of said first plane of adhesive or said second plane of adhesive comprises:
a first portion of adhesive being laterally located between said first and second longitudinal side edges of said elastic film, said first portion of adhesive being defined as film adhesive;
a second portion of adhesive being laterally located near at least one longitudinal side edge of said elastic film and inboard of said at least one longitudinal side edge, said second portion of adhesive being defined as tackdown adhesive; and
a third portion of adhesive being laterally located outboard of said longitudinal side edges of said elastic film to adhere the portions of the first nonwoven material extending laterally outboard of the first and second longitudinal side edges of said elastic film to corresponding portions of the second nonwoven material extending laterally outboard of the first and second longitudinal side edges of said elastic film, said third portion of adhesive being defined as nonwoven adhesive;
wherein the tackdown adhesive is present in an amount greater than an amount of the film adhesive and greater than an amount of the nonwoven adhesive;
wherein the film adhesive is discontinuous, the tackdown adhesive is continuous, and the nonwoven adhesive is continuous;
wherein the elastic film is applied discontinuously between said first and second nonwoven material;
wherein each of the above elements being substantially laminated together to form a laminate; and
wherein said laminate is activated to form the stretch laminate.

2. The stretch laminate of claim 1 , wherein the other of said first plane of adhesive or said second plane of adhesive comprises:
a first portion of adhesive being laterally located between said first and second longitudinal side edges of said elastic film, said first portion of adhesive being defined as film adhesive;
a second portion of adhesive being laterally located near at least one longitudinal side edge of said elastic film, said second portion of adhesive being defined as tackdown adhesive; and
a third portion of adhesive being laterally located outboard of said longitudinal edges of said elastic film, said third portion of adhesive being defined as nonwoven adhesive.

3. The stretch laminate of claim 2 , wherein said nonwoven adhesive has an application amount less than that of said tackdown adhesive.

4. The stretch laminate of claim 1 , wherein said laminate is activated in a cross direction of said laminate.

5. The stretch laminate of claim 4 , wherein the laminate is activated between the longitudinal side edges of said elastic film.

6. The stretch laminate of claim 1 , wherein at least one of the tackdown adhesive, the film adhesive and the nonwoven adhesive are applied using a spray applicator.

7. A stretch laminate comprising:
a first nonwoven material;
a second nonwoven material;
an elastic film, said elastic film being interposed between said first and second nonwoven material, said elastic film having a first longitudinal side edge and a second longitudinal side edge, wherein portions of said first and second nonwoven materials extend laterally outboard of said first and second longitudinal side edges of said elastic film;
a first plane of adhesive, said first plane of adhesive being interposed between said first nonwoven material and said elastic film;
a second plane of adhesive, said second plane of adhesive being interposed between said first nonwoven material and said elastic film, wherein said first and second plane of adhesive have differing amounts of adhesive from each other as measured laterally within the stretch laminate;
a third plane of adhesive, said third plane of adhesive being interposed between said second nonwoven material and said elastic film;
a fourth plane of adhesive, said fourth plane of adhesive being interposed between said second nonwoven material and said elastic film, wherein said third and fourth plane of adhesive have differing amounts of adhesive from each other as measured laterally within the stretch laminate;
wherein said first and fourth planes of adhesive comprise:
a first portion of adhesive being laterally located between said first and second longitudinal side edges of said elastic film, said first portion of adhesive being defined as film adhesive; and
a second portion of adhesive being laterally located near at least one longitudinal side edge of said elastic film and inboard of said at least one longitudinal side edge, said second portion of adhesive being defined as tackdown adhesive;
wherein said second and third planes of adhesive comprise of adhesive being laterally located outboard of said longitudinal side edges of said elastic film to adhere the portions of the first nonwoven material extending laterally outboard of the first and second longitudinal side edges of said elastic film to corresponding portions of the second nonwoven material extending laterally outboard of the first and second longitudinal side edges of said elastic film, said second and third planes of adhesive being defined as nonwoven adhesive;
wherein the tackdown adhesive is present in an amount greater than an amount of the film adhesive and greater than an amount of the nonwoven adhesive;
wherein at least one of said first plane of adhesive, said second plane of adhesive, said third plane of adhesive, or said fourth plane of adhesive is applied through an adhesive applicator having a plurality of shims designated for application of said film adhesive, said tackdown adhesive, and/or said nonwoven adhesive;
wherein the film adhesive is discontinuous, the tackdown adhesive is continuous, and the nonwoven adhesive is continuous;
wherein the elastic film is applied discontinuously between said first and second nonwoven material;
wherein each of the above elements being substantially laminated together to form a laminate; and
wherein said laminate is activated to form the stretch laminate.

8. The stretch laminate of claim 7 , wherein said laminate is activated in a cross direction of said laminate.

9. The stretch laminate of claim 8 , wherein the laminate is activated between the longitudinal side edges of said elastic film.

10. The stretch laminate of claim 7 , wherein at least one of the tackdown adhesive, the film adhesive and the nonwoven adhesive are applied using a spray applicator.

11. A stretch laminate comprising:
a first nonwoven material;
a second nonwoven material;
an elastic film; said elastic film being interposed between said first and second nonwoven material, said elastic film having a first longitudinal side edge and a second longitudinal side edge, wherein portions of said first and second nonwoven materials extend laterally outboard of said first and second longitudinal side edges of said

Assignees

• Procter & Gamble

Inventors

• Lightcap William Lawrence
• Lam Joseph Hung
• Maldonado Clarissa
• Martin Kevin Lee

Classifications

• Y10T442/659

  Including an additional nonwoven fabric · CPC title

• Y10T428/24851

  Intermediate layer is discontinuous or differential · CPC title

• B32B37/1292

  selectively, e.g. in stripes, in patterns (B32B37/0076 takes precedence) · CPC title

• B32B3/10 Primary

  characterised by a discontinuous layer, i.e. formed of separate pieces of material · CPC title

• B32B2250/40

  Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA · CPC title