Methods, compositions and blends for forming articles having improved environmental stress crack resistance
AssigneeViva Healthcare Packaging Limited
InventorIan Jacobs
Life of this patent
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Abstract
Several processes for the manufacture of thin-walled tubes are described, including: injection moulding an article and annealing the article, injection moulding a blend of a polymer and a high melt flow polymer, injection moulding a blend of a polymer and nanoparticles or nanocomposites. Using nanoparticles to improve ESCR and/or tear resistance of a polymer or blend is also disclosed.
Claims26
A process for the manufacture of flexible thin-walled articles comprising:
- injection moulding a body of the article from a plastics material;
- adapting the body to form a base of the article;
- and
- annealing the plastics material.
A process for the manufacture of flexible thin-walled articles including:
- injection moulding a blend of (a) at least one polymer and (b) at least one high melt flow compatible polymer having an MFI of greater than 100.
A process for the manufacture of flexible thin-walled articles including:
- injection moulding a blend of (a) at least one polymer and (b) at let one, compatible polymer, wherein at least one of (a) and (b) includes a polypropylene having varying tacticity within its structure.
A process for the manufacture of flexible thin-walled articles including:
- injection moulding a blend of (a) at least one polymer and b) at least one compatible polymer, wherein the extractables content for the blend and/or the flexible thin-walled article manufactured is less than or equal to 2.0 wt % as measured by ASTM D-5227.
Dependencies are inferred from the claim text.