Multiple-layer edgebanding

Patent metadata

Field	Value
Publication number	US-9957420-B2
Application number	US-201414270656-A
Country	US
Kind code	B2
Filing date	May 6, 2014
Priority date	Nov 9, 2011
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

Composite of shaped bodies made from wooden materials with film-shaped substrates, wherein a surface of the shaped body has a first layer comprising a crosslinked radiation-curing hot-melt adhesive, said layer is covered with a second adhesive layer of a hot-melt adhesive, and said second adhesive layer is adhesively bonded to a film-shaped substrate. A method for producing composite shaped bodies of this type is provided, in which method, as one step, the surface is coated with a UV-crosslinkable hot-melt adhesive, and which method makes in-line production of the composite bodies possible.

First claim

The invention claimed is:

1. A composite shaped element comprising wood materials and a film-shaped substrate, wherein a surface of the shaped element comprises a first layer of a crosslinked, radiation-cured melt adhesive, this layer being covered with a second adhesive layer of a hot melt adhesive, and this second adhesive layer being adhesively bonded to a film-shaped substrate.

2. The composite according to claim 1 , wherein the radiation-curing adhesive is a UV-crosslinking adhesive containing 60 to 95 wt % polyester polymers and/or polyether polymers having at least one radiation-curing functional group, 5 to 40 wt % oligomers having at least two radiation-curing groups and/or monomers having one radiation-curable group, 0.1 to 20 wt % additives comprising photoinitiators.

3. The composite according to claim 2 , wherein the UV-crosslinking adhesive further contains 10 to 50 wt % fillers or pigments, wherein the sum of all constituents is to yield 100 wt %.

4. The composite according to claim 1 , wherein the first layer of the crosslinked radiation-curing melt adhesive is profiled and/or shaped.

5. The composite according to claim 1 , wherein the second adhesive layer is made up of a crosslinked reactive polyurethane melt adhesive.

6. The composite according to claim 1 , wherein the wood material is selected from wood, particle board, MDF panel, and/or the film-shaped substrate is selected from plastic film, paper substrate, veneer film, or plastic edge strip.

7. A method for manufacturing a composite according to claim 1 , comprising the steps of:
coating a surface of a shaped element with a radiation-curable melt adhesive;
crosslinking the adhesive layer with actinic radiation;
optionally, mechanically processing the crosslinked surface;
applying a second melt adhesive onto the processed surface;
adhesively bonding the first substrate to a film-shaped substrate.

8. The method according to claim 7 , wherein the first melt adhesive is applied at a temperature at which the adhesive has a viscosity of between 1000 and 20,000 mPas.

9. The method according to claim 8 , wherein the second melt adhesive can be applied to the crosslinked first layer immediately after crosslinking.

10. The method according to claim 8 , wherein an NCO-reactive polyurethane melt adhesive is used as a second melt adhesive.

11. The method according to claim 7 , wherein the layer thickness of the UV-crosslinkable adhesive is between 1 and 5 mm, and is crosslinkable by exposure to UV radiation.

12. The method according to claim 11 , wherein the layer of the UV-crosslinkable adhesive is crosslinked by irradiated for between 0.3 and 15 seconds with UV radiation.

Assignees

• Henkel Ag & Co Kgaa

Inventors

• Morgeneyer Thomas
• Pielert Lutz
• Lotz Juergen

Classifications

• B32B21/08

  of synthetic resin · CPC title

• B32B21/13

  all layers being exclusively wood · CPC title

• B32B2255/08

  on wood layer · CPC title

• B32B2255/26

  Polymeric coating · CPC title

• Y10T428/2809

  including irradiated or wave energy treated component · CPC title