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Wall covering and method of producing the same

A technology for coverings and walls, applied in the direction of acidic copolymer adhesives, adhesive types, film/sheet adhesives, etc., can solve the problems of lack of moisture barrier, difficult to remove wall coverings, etc., to achieve The effect of low sliding resistance

Active Publication Date: 2017-02-22
AHLSTROM MUNKSJO OYJ
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, the compositions under study contain components that produce irreversible changes after application of the wall covering against the desired surface, which makes it difficult to remove the wall covering after it has adhered to the surface
[0012] Another problem is the lack of a properly functioning moisture barrier that will allow wetting and subsequent effective drying of the adhesive while still protecting the substrate layer of the wall covering

Method used

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  • Wall covering and method of producing the same
  • Wall covering and method of producing the same

Examples

Experimental program
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Effect test

example 1

[0098] To achieve a repositionable adhesive coating, a polyacrylic acid precursor (a water-soluble monomer, preferably an α,β-ethylenically unsaturated carboxylic acid monomer commercially known as PD8081H, composed of rich The aqueous product supplied by HB Fuller) was mixed with a cross-linking agent, ammonium zirconium carbonate (AZC).

[0099] The amount of cross-linking agent added is not enough to achieve complete compounding of polyacrylic acid monomers.

[0100] figure 1 Slip resistance and final adhesion as a function of crosslinker concentration are shown. The results were obtained under the following conditions:

[0101] - Water application: 130 grams per square meter on the substrate

[0102] -3 minute wetting time before application to primed plasterboard

[0103] - Analysis of slip resistance after 10 minutes

[0104] - Analysis of final adhesion after 28 hours.

[0105] As evident from the figure, by limiting the amount of AZC in the aqueous polyacrylic a...

example 2

[0114] Peelable, repositionable wall covering rolls are prepared as follows:

[0115] 130 grams of nonwoven wall covering were used as the base substrate. On the backside of the base substrate, a precoat is applied using a precoat formulation. The preparation has the following composition:

[0116] 30% Rhoplex E 3482 (Dow), acrylic latex

[0117] 70% Barrisurf HX (Imerys), a very high profile clay

[0118] Coatings were prepared at 64% solids. The coat weight was 10 grams. Drying of the coated coils was carried out at elevated temperature (130° C.).

[0119] The water permeability / absorption of the base substrate was measured by Cobb (1 minute). result in figure 2 given in.

[0120] As is evident from the figure, the precoat consisting of latex Rhoplex E 3482 and clay Barrisurf HX formed an effective barrier coating.

[0121] On the precoated coils thus obtained, a top coat was applied.

[0122] The top coat is an aqueous dispersion with the following composition of...

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Abstract

A wall covering, a method of producing it and a method of covering a wall. The wall covering comprises a planar substrate, such as a nonwoven base substrate, having a front, and a back facing opposite the front. There is a barrier layer on the back of the substrate and an adhesive layer superimposed on the barrier layer. The adhesive layer comprises a first polymer component, a second polymer component, the first polymer component being a non crosslinked polymer and said second polymer component being a crosslinked polymer exhibiting properties of superabsorbency. The adhesive exhibits when exposed to water, a strength sufficient for binding to a wall substrate and a glide resistance low enough for allowing repositioning of the wall cover by sliding the wallcover on the wall without having to lift it up over a period of time of at least 5 minutes.

Description

technical field [0001] The present invention relates to wall coverings and methods for their preparation. In particular, the present invention relates to wall coverings comprising a nonwoven substrate having a barrier layer on the back and an adhesive layer on the barrier layer. [0002] The invention also relates to a method for at least partially covering a wall. Background technique [0003] Adhesives for wall coverings are usually based on pre-slurried CMC and starch, CMC+starch or pressure sensitive adhesive formulations. For example, US 4,355,074 discloses the use of the swellable polymer NaCMC as a binder. [0004] However, conventional wall coverings currently do not provide adhesion and repositionability by spraying water onto the wall. [0005] Additional adhesive compositions are known in the patent literature. Thus, US Patent No. 4,361,452 discloses a water-based adhesive for use in wall coverings. This patent provides adhesives containing water-insoluble bu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/20D21H19/56D21H19/58D21H19/60D21H19/82D21H27/20
CPCD21H19/20D21H19/56D21H19/58D21H19/60D21H19/82D21H27/20C09J2433/00C09J7/21C09J2433/001C09J133/02C09J2409/001C09J7/30C09J2400/263C09J2301/122C09J2301/312
Inventor D.M.本顿E.莱蒂H.发哈特N.特雷姆布拉M.瓦拉李新华O.舒尔勒
Owner AHLSTROM MUNKSJO OYJ
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