US 2022/0307201 A1 · Method of producing a fibrous product and a fibrous product

Abstract

The present invention relates to multi-layer fiber products and a method of manufacturing these kinds of products. The present product comprises a first layer consists mainly of natural fibers and a second, heat-sealing layer located on top of the first layer. The heat-sealing layer consists mainly of synthetic thermoplastic fibers or particles. According to the present method, the heat-sealing layer is brought onto the first layer already during the web forming process, the first and the second layers being formed and joined together in a foam forming process. With the present invention, it is possible to decrease the amount of plastic materials in packaging materials having heat-sealing properties.

Claims17

Dependent claims

A multilayered fibrous product comprising:

a first layer comprising natural fibers, and
a second layer comprising synthetic fibers or particles,
said first and second layers formed and joined together by foam forming, said first and said second layers being arranged in an overlapping relationship, and said second layer being capable of conferring properties of heat-sealing to the fibrous product.

Dependencies are inferred from the claim text.

Facts

Application

17/842,907Filed 17 Jun 2022

Priority

FI 2017620631 Dec 2017

Published

29 Sep 2022

Term ends

Not estimatedThe source records don’t support an estimate.

Classification58 codes

B32B 29/005
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: next to another layer of paper…
D21H 17/34
Synthetic macromolecular compounds: obtained by reactions only involving carbon-to-carbon unsaturated bonds
B32B 5/18
Layered products characterised by the non- homogeneity or physical structure , i.e. comprising a fibrous, filamentary, particulate or foam…
B32B 5/245
One layer being a fibrous or filamentary layer: another layer next to it being a foam layer

Method of producing a fibrous product and a fibrous product

Life of this patent

Method of producing a fibrous product and a fibrous product

Life of this patent

Abstract

Claims17