Tool set for manufacturing adhesive patches, method of manufacturing an adhesive patch and adhesive layering
Inventors
Bee, Markus • GALLINGER, HELENA • Saifert, Alexander • Weber-Stebliwez, Andreas • Schlögel, Georg • Nishiura, Akio • Sasaki, Akinori • Goto, Masaoki
Assignees
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Publication Number
US-12459151-B2
Publication Date
2025-11-04
Expiration Date
Abstract
A tool set for manufacturing adhesive patches, by processing laminate web. The tool set includes a cutting tool having a cutting face lying in a cutting plane, and an embossing tool having a pressing face lying in a pressing plane, where the cutting plane and the pressing plane are parallel. The embossing tool is configured to press an edge area shape of the adhesive patch to be manufactured, and the cutting tool is configured to cut out the adhesive patch to be manufactured by cutting in edge area or outside the edge area. Furthermore, a method of manufacturing adhesive patches. The method essentially includes a feeding step, a pressing step and cutting step. Lastly an adhesive layering having a backing layer and an adhesive matrix layer. The backing layer having a larger size than the adhesive matrix layer.
Core Innovation
The disclosure relates to an adhesive patch and to a method of manufacturing adhesive patches by using a tool set. The tool set includes a cutting tool and an embossing tool that are coaxially moveable relative to each other. The method feeds a laminate web comprising a backing layer, a support layer, and an adhesive matrix layer arranged between the backing layer and the support layer as input material.
An edge area of the adhesive patch to be manufactured is pressed on the backing layer, thereby pressing out adhesive matrix material under the edge area and bending the edge area around the adhesive matrix layer. After pressing, the adhesive patch to be manufactured is cut out by cutting the backing layer outside the edge area. The pressing and bending form an edge region in which adhesive matrix material is displaced under the edge area so that it is reduced at the perimeter.
In the disclosed embodiments, the adhesive patch is produced from a laminate web with an overlapping area where embossing covers and bends the backing layer around the adhesive matrix layer and forms a pressed-out area of adhesive matrix material contacting the overlapping area. The disclosure also covers adhesive patch intermediate products in which an overlapping area is in loose contact with the support layer. Downstream operations described include removing a support layer, transferring and connecting the adhesive patch to a release liner, and packaging.
Claims Coverage
The partial content includes one independent claim directed to a manufacturing method, supported by dependent claims that refine both the adhesive edge/overlap structure and the tool geometry/operation. Across the independent claim and its dependents, the coverage centers on pressing to displace adhesive matrix material at an edge area, followed by cutting the backing layer outside that edge area using coaxially moveable cutting and embossing tools.
Coaxially moveable cutting and embossing tools for edge pressing and cutting
A method using a tool set comprising a cutting tool and an embossing tool, wherein the cutting tool and the embossing tool are coaxially moveable relative to each other, including feeding a laminate web; pressing an edge area of the adhesive patch on the backing layer to press out adhesive matrix material under the edge area and bend the edge area around the adhesive matrix layer; and cutting out the adhesive patch by cutting the backing layer outside the edge area.
Pressing-face and cutting-face dimension relationship
The tool set has a cutting face and a pressing face, wherein the inner and outer dimensions of the pressing face essentially match the inner and outer dimensions of the cutting face, with the inner dimension of the pressing face being between 80% and 98% of the dimensions of the cutting face.
Height-offset relationship between cutting face and pressing face
The tool set is configured so that at the cutting position the cutting face and/or pressing face has a recessed height offset on which the laminate web is arranged, and the cutting face protrudes relative to the pressing face by a height equal to the backing layer of the laminate web.
Embossing that covers and bends backing around adhesive matrix to form pressed-out area
In the adhesive layering of an overlapping area, embossing covers and bends the backing layer around the adhesive matrix layer and forms a pressed-out area of adhesive matrix material contacting the overlapping area.
Adhesive patch intermediate product with loose contact overlapping area
An adhesive patch intermediate product comprises at least one adhesive layering on a support layer, with the adhesive matrix layer arranged between the support layer and the backing layer, and wherein the overlapping area is in loose contact with the support layer.
Support-layer removal and release-liner transfer with packaging
The method further includes removing the support layer, transferring and connecting the adhesive patch to a release liner, and packaging.
Overall, the claim coverage emphasizes a manufacturing method in which coaxially moveable cutting and embossing tools press an edge area to displace adhesive matrix material and bend the edge area around the adhesive matrix layer, followed by cutting the backing outside that edge area. Dependent claims further define embossing behavior in an overlapping area, specify intermediate product structure via loose contact, and constrain tool geometry via dimension and height-offset relationships, with downstream transfer to a release liner and packaging.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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