Biodegradable linerless adhesive tapes and labels

Abstract

A linerless label or tape comprises a substantially biodegradable, natural or synthetic, woven or non-woven substrate impregnated with a formulation including at least 90 weight percent of a polyester amide segmented block copolymer. This label or tape may be conveniently prepared above the melt temperature of the copolymer and is printable. It offers the advantage of being able to be prepared such that it is substantially non-tacky at room or storage temperatures, and yet may be easily affixed to a substrate when heated to a temperature above the melt temperature of the impregnant, preferably ranging from 60°C to 150°C. "Linerless" is defined as not requiring a separable, wastable layer, and a release coating to facilitate rolling or stacking is also not required.

Description

[0001] related application [0002] This application claims the benefit of US Provisional Application No. 61 / 665,342, filed June 28, 2012. field of invention [0003] The invention relates to the technical field of adhesive labels and adhesive tapes, in particular to the technical field of biodegradable, liner-free labels and adhesive tapes. Background of the invention [0004] Adhesive labels and tapes typically consist of a substrate coated with a pressure-sensitive adhesive (PSA). In order to keep the PSA from sticking to the substrate or backing paper in the desired location or prior to application, a "liner" or "liner" can be used. Backing paper", the breakaway liner is usually easier to remove and eventually disposed of, therefore, this method and means is not environmentally friendly in nature, other means to avoid the backing paper waste problem have been developed by researchers. [0005] For example, WO20081124 describes a layered structure comprising, in a possib...

AI Technical Summary

Problems solved by technology

[0010] While these and other inventions provide means for labels and tapes to be bonded to substrates, they fail to address the need for relatively or substantially non-adhesive biodegradable linerless labels or tapes (e.g., PSTC No. 5 or FINAT No. 9 or similar ASTM methods), and / or room temperature and / or typical storage temperatures and possibly up to 60°C-150°C exhibit improved peel test structure (eg, ASTM D3300 / D3300M) and / or shear test As a result (e.g., ASTM D3654 / D3654M), storage and placement on target substrates can be simplified, but can be easily heated and adhered to substrates

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