Invention Grant
- Patent Title: Laminates made using hot melt adhesives based on a blend of propylene polymers made using single-site catalysts
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Application No.: US16243254Application Date: 2019-01-09
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Publication No.: US10597563B2Publication Date: 2020-03-24
- Inventor: Baoyu Wang , Kelley Gerschke , Terhi I. Hawkins , Charley Paul , Kimberly E. Secrist
- Applicant: Bostik, Inc.
- Applicant Address: US WI Wauwatosa
- Assignee: BOSTIK, INC.
- Current Assignee: BOSTIK, INC.
- Current Assignee Address: US WI Wauwatosa
- Agent Christopher R. Lewis
- Main IPC: C08J11/06
- IPC: C08J11/06 ; C09J123/14 ; C09J11/06 ; B32B27/32 ; B32B5/02 ; B32B27/12 ; C08L23/14 ; B32B5/04 ; B32B5/26 ; B32B7/12 ; B32B3/04 ; B32B37/12

Abstract:
A laminate comprises a primary substrate and a secondary substrate mated with the primary substrate through contact with a hot melt adhesive. The hot melt adhesive comprises a polymer blend based on a low molecular weight semicrystalline propylene based polymer and a high molecular weight essentially amorphous propylene based polymer, both of which are prepared by using single-site catalysts. The composition further contains a compatible tackifier, a plasticizer, an antioxidant, and optionally a wax, a filler, a colorant, a UV absorber, another polymer, or combinations thereof. Particularly preferred applications include nonwoven disposable diaper and feminine sanitary napkin construction, diaper and adult incontinent brief elastic attachment, diaper and napkin core stabilization, diaper backsheet lamination, industrial filter material conversion, and surgical gown and surgical drape assemblies.
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