Invention Grant
- Patent Title: Method for manufacturing a packaging material
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Application No.: US15119482Application Date: 2015-02-19
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Publication No.: US10040273B2Publication Date: 2018-08-07
- Inventor: Kimmo Nevalainen , Jari Räsänen , Ville Ribu
- Applicant: Stora Enso OYJ
- Applicant Address: FI Helsinki
- Assignee: STORA ENSO OYJ
- Current Assignee: STORA ENSO OYJ
- Current Assignee Address: FI Helsinki
- Agency: Greer, Burns & Crain, Ltd.
- Priority: SE1450204 20140219
- International Application: PCT/IB2015/051268 WO 20150219
- International Announcement: WO2015/125101 WO 20150827
- Main IPC: B32B27/32
- IPC: B32B27/32 ; B32B27/10 ; B32B37/15 ; B32B7/12 ; B29C47/06 ; B29C47/02 ; B65D1/26 ; B65D65/40 ; B29C47/00 ; C08L23/06 ; B29K23/00 ; B29L9/00 ; B29L31/00

Abstract:
The invention relates to a polymer-coated packaging material, a method of manufacturing the same, and products, such as a disposable drinking cup, made from the material. The packaging material comprises a fibrous base (1) of paper or board and an extruded polymer layer (2) containing a blend of (i) 0 to 25 wt-% of a branched low-density polyethylene (LDPE) with a lower melt viscosity and (ii) 75 to 90 wt-% of a linear low-density polyethylene (LLDPE) with a higher melt viscosity. The packaging material of the invention comprises multilayer coatings, e.g. an adhesive innermost and a heat-sealable outermost layer (2, 4) of said blend and a vapor barrier middle layer (3) of at most 90 wt-% of high density polyethylene (HDPE). The layers (2, 3, 4) are brought and adhered to the fibrous base (1) by coextrusion. To maximize renewability of the materials HDPE and LLDPE as used for the structure are of biologic origin.
Public/Granted literature
- US20170008264A1 A METHOD FOR MANUFACTURING A PACKAGING MATERIAL Public/Granted day:2017-01-12
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