Patent · US Expired

Laminating film without a release layer, process for the production thereof and use thereof

US5876852A · kind A · utility

6Cited by

2References

2Claims

0Family size

Assignee

Wolff Walsrode AG · DE

Inventors

Nicole Hargarter · Charlottesville, US
Dirk Schultze · Bad Fallingbostel, DE
Reinhard Kunold · Bad Fallingbostel, DE

Key dates

Filing date	Jul 10, 1996
Grant date	Mar 2, 1999
Priority date	—
Expiry date	Jul 10, 2016

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31587
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

Film of at least two layers having at least one side softening at a lower temperature and at least one side softening at a higher temperature, wherein the higher-softening side substantially consists of a thermoplastic polyurethane which softens at above 100.degree. C. on a Kofler hot bench and the median of the softening range is at least 15.degree. C. above that of the lower-softening layer and the matrix component of the lower-softening side consists of at least one hot-bonding thermoplastic material from the group comprising polyamides, polyesters and polyurethanes having a median of the softening range on a Kofler hot bench of below 100.degree. C. and at least one thermoplastic additive component containing hydrocarbon is added to the lower-softening layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.