Methods of bonding materials, especially materials used in absorbent articles
Methods of and apparatus for bonding and/or embossing of materials, especially materials used in the manufacture of hygienic articles, including, but not limited, to absorbent articles such as feminine hygiene articles, disposable diapers, incontinence devices, wipes, and the like.
1. A method of bonding a laminate, the method comprising the steps of:
(a) providing an anvil roll and a patterned roll, said anvil roll and said patterned roll being capable of counter-rotating in relation to each other, said anvil roll having an anvil roll surface and said patterned roll having a patterned roll surface, at least one load bearing member disposed between said patterned roll surface and said anvil roll surface, said load bearing member having a caliper, at least one pattern element extending from said patterned roll surface, said pattern element having a height, said caliper of said load bearing member being greater than said height of said pattern element;
(b) providing a loading force to press said anvil roll to said patterned roll;
(c) providing a laminate between said patterned roll surface and said anvil roll surface; and
(d) counter-rotating said anvil roll and said patterned roll in relation to one another to compress said laminate between said pattern element and said anvil roll surface to effect a bond in said laminate.
2. The method of claim 1 , wherein said pattern element has a land surface, said land surface is selected from the group consisting of a circle, and an oval.
3. The method of claim 1 , wherein said load bearing member is integral with said pattern roll.
4. The method of claim 1 , wherein said load bearing member is on said anvil roll.
5. An apparatus for bonding or embossing a laminate, the apparatus comprising: an anvil roll and a patterned roll, said anvil roll and said patterned roll being capable of counter-rotating in relation to each other, said anvil roll having an anvil roll surface and said patterned roll having a patterned roll surface, at least one load bearing member disposed between said patterned roll surface and said anvil roll surface, said load bearing member having a caliper, at least one pattern element extending from said patterned roll surface, said pattern element having a height, said caliper of said load bearing member being greater than said height of said pattern element.
6. The apparatus of claim 5 , wherein said pattern element has a land surface, said land surface is selected from the group consisting of a circle, and an oval.
7. The apparatus of claim 5 , wherein said load bearing member is integral with said pattern roll.
8. The method of claim 5 , wherein said load bearing member is on said anvil roll.