초록 ▼

A method of forming apertures generally greater than about 0.05 square millimeters in a thin sheet material. The thin sheet material includes a first side and a second side at least one side of the thin sheet material is substantially coated with an adhesive. The method comprises the steps of (a) pl

A method of forming apertures generally greater than about 0.05 square millimeters in a thin sheet material. The thin sheet material includes a first side and a second side at least one side of the thin sheet material is substantially coated with an adhesive. The method comprises the steps of (a) placing the adhesive-coated thin sheet material on a patterned anvil having a pattern of raised areas wherein the height of the raised areas is equal to or less than the thickness of the thin sheet material and the adhesive; and (b) subjecting the thin sheet material to a sufficient amount of sonic vibrations to aperture the thin sheet material and the adhesive; and whereby the thin sheet material and the adhesive is apertured in a pattern generally the same as the pattern of raised areas on the patterned anvil.

대표청구항 ▼

[ We claim:] [1.] A method of forming apertures in a nonwoven or foam sheet material having a first side and a second side wherein at least one side of the nonwoven or foam sheet material is substantially coated with an adhesive and further wherein the area of each of the formed apertures is general

[ We claim:] [1.] A method of forming apertures in a nonwoven or foam sheet material having a first side and a second side wherein at least one side of the nonwoven or foam sheet material is substantially coated with an adhesive and further wherein the area of each of the formed apertures is generally greater than about 0.05 square millimeters, the method comprising the steps of:(a) placing the adhesive-coated sheet material on a patterned anvil having a pattern of flattened raised areas wherein the height of the flattened raised areas is equal to or less than the thickness of the sheet material and the adhesive; and(b) subjecting the sheet material to a sufficient amount of sonic vibrations to aperture the sheet material and the adhesive; andwhereby the sheet material and the adhesive is apertured in a pattern generally the same as the pattern of raised areas on the patterned anvil.