US 8,999,491 B2 · Wet-strength corrugated fiberboard

Abstract

The present invention relates to single face or double faced corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction, ii) a biodegradable polymeric coating from 1 to 100 μm in thickness. More particularly, the present invention relates to single face or double faced and/or corrugated fiberboard comprising one or more corrugated plies, wherein at least one of the linerboard plies or corrugated plies is a paper-film assembly comprising: i) a 30 to 600 g/m2 grammage papery material of construction as outer layer, ii) a biodegradable polymeric coating from 1 to 100 μm in thickness as interlayer, and iii) a 30 to 600 g/m2 grammage papery material of construction as inner layer. The present invention further relates to methods of producing this corrugated fiberboard.

Claims12

Dependent claims

A single- or double-faced corrugated fiberboard comprising one or more linerboard plies and one or more corrugated plies, wherein at least one of the linerboard plies or at least one of the corrugated plies is a paper-film assembly comprising:

i) a 30 to 600 g/m2 grammage papery material of construction as a layer, wherein said layer includes wastepaper to an extent in the range from 10 to 100%;
and
ii) a biodegradable polymeric coating from 1 to 100 μm in thickness.

Dependencies are inferred from the claim text.

Facts

Application

13/214,880Filed 22 Aug 2011 · us provisional application

Priority

23 Aug 2010

Published

US 2012/0045622 A123 Feb 2012

Granted

7 Apr 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification36 codes

B31F 1/2886
Combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard: additionally reinforcing, e.g. by applying…
B32B 3/28
Characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or…
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 27/10
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of paper or cardboard

Wet-strength corrugated fiberboard

Life of this patent

Wet-strength corrugated fiberboard

Life of this patent

Abstract

Claims12