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Biopolymer coatings for compostable cardboard packaging

A technology of biopolymers and polymers, applied in household packaging, types of packaging items, special packaging items, etc.

Active Publication Date: 2021-10-08
WESTROCK MWV LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, PLA presents challenges when used in extrusion coating processes, including adhesion to paperboard, heat-sealability and large-scale edge weave and neck-in

Method used

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  • Biopolymer coatings for compostable cardboard packaging
  • Biopolymer coatings for compostable cardboard packaging
  • Biopolymer coatings for compostable cardboard packaging

Examples

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Embodiment Construction

[0016] Detailed descriptions of specific embodiments of packaging materials are disclosed herein. It is to be understood that the disclosed embodiments are merely examples of the ways in which particular aspects of the invention may be implemented, and do not represent an exhaustive list of all ways in which the invention may be embodied. As used herein, the word "exemplary" is used broadly to refer to various embodiments that serve as an illustration, sample, model, or pattern. In fact, it should be understood that the packaging materials described herein may be embodied in different and alternative forms. Any specific structural and functional details disclosed herein are not to be interpreted as limiting, but merely as a basis for the claims and as a representative basis for teaching one skilled in the art to variously employ the present invention.

[0017] Figure 1A A simplified cross-sectional view of a first packaging material 100 comprising paperboard 110 is shown, h...

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Abstract

Coatings for paperboard contain polylactic acid and inorganic materials. The inorganic material may be talc. The presence of talc has beneficial effects on extrusion processing behavior, including lower melt temperature, lower extrusion pressure and lower motor load. Additionally, the presence of talc reduces edge texture and necking during extrusion coating.

Description

[0001] References to related applications [0002] This application claims the benefit of priority under 35 U.S.C. §119(e) of US Provisional Application Serial No. 62 / 259,872, filed November 25, 2015, which is incorporated herein by reference in its entirety. technical field [0003] The present invention relates to biopolymer coating structures, and more particularly to biopolymer coating structures comprising inorganic components and having improved extrusion processing characteristics. Background technique [0004] In the field of packaging, it is often desirable to provide packaging structures with polymeric coatings. This polymer coating can impart durability, moisture resistance and other useful properties such as heat-sealability. Recently, there has been increasing interest in using biopolymers for polymer coating in such packaging structures. One popular biopolymer is polylactic acid (PLA). However, PLA presents challenges when used in extrusion coating processes...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21H27/10D21H27/18D21H27/30D21H19/42D21H19/56D21H19/80B32B27/36
CPCB32B27/36D21H27/10D21H27/30D21H19/42D21H19/56D21H19/80B32B7/04B32B7/12B32B27/10B32B27/18B32B27/22B32B27/308B32B2250/02B32B2250/03B32B2250/40B32B2264/10B32B2264/102B32B2264/104B32B2264/107B32B2307/31B32B2307/7163B32B2307/732B32B2307/748B32B2439/40D21H27/18B65D65/42B65D65/466D21H19/40D21H19/62D21H19/82
Inventor R.巴德瓦杰C.C.杨C.E.阿尔基维奇
Owner WESTROCK MWV LLC