Disposable lid having polymer composite of polyolefin and mineral filler

a polymer composite and mineral filler technology, applied in the field of polymer compositions, can solve the problems of high impact polystyrene resin, comparatively high carbon footprint, etc., and achieve the effect of high density

a polymer composite and mineral filler technology, applied in the field of polymer compositions, can solve the problems of high impact polystyrene resin, comparatively high carbon footprint, etc., and achieve the effect of high density

US20120267368A1Inactive Publication Date: 2012-10-25PACTIV CORP
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  • Disposable lid having polymer composite of polyolefin and mineral filler
  • Disposable lid having polymer composite of polyolefin and mineral filler

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[0020]Reference will now be made in detail to the present preferred embodiments of the application, examples of which are illustrated in the accompanying drawings. The disposable lids presented herein generally are intended for use with cups or other containers for holding high temperature beverages, such as coffee. Although reference will be made herein to lids for hot beverage cups, other similar or suitable uses are contemplated.

[0021]Typically, polyolefins have a heat deflection temperature lower than high impact polystyrene (“HIPS”) and thus are not suitable for use alone (i.e., neat) as a lidding material for hot beverage cups. However, in accordance with the disclosed subject matter, the heat deflection temperature of the polyolefin can be improved by adding at least one mineral filler to form a polymer composite. The resulting polymer composite can have a heat deflection temperature at least about that of high impact polystyrene and thus be suitable for use as a lidding mate...

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Abstract

Disposable lid comprises a thermoformed sheet in the shape of a lid for a hot beverage container. The sheet comprises a polymer composite of a polyolefin and at least one mineral filler. The sheet has a thickness less than about 0.035 inches and a heat deflection temperature at least comparable to that of high impact polystyrene.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application claims the benefit of and priority to U.S. Provisional Application Ser. No. 61 / 477,886, filed Apr. 21, 2011, which is hereby incorporated by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present application generally relates to polymer compositions particularly suited for disposable lids and the like. Particularly, the present application relates to a disposable lid comprising a thermoformed sheet having a polymer composite of polyolefin and at least one mineral filler.[0004]2. Description of Related Art[0005]Hot beverages, such as freshly brewed coffee for people on the go, are usually served in heavy paper cups with disposable lids. Coffee is typically brewed at 90-96° C., held at 82-88° C. and served at 70-80° C. A coffee cup lid preferably has a mechanical strength to withstand the force required to push the lid onto the cup and to maintain the dimensional stability at t...

Claims

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Application Information

Patent Timeline
25 Oct 2012
Publication
US20120267368A1
IPC
B65D51/00
CPC
B65D43/00; C08K3/0075; C08K3/34; C08L23/02; C08K3/26; C08L23/12; C08K2003/265; C08L23/06
Inventors
WU, WEN PAO; FORBES, ALAN H.