# US 10,442,031 B2 · Optimization of the activation of adhesive agents by laser radiation

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- Number: US 10,442,031 B2
- Document ID: US10442031B2
- Status: Granted
- Kind: B2
- Application number: 15/489,934
- Filed: 2017-04-18
- Published: 2017-08-03
- Granted: 2019-10-15
- Earliest claimed: 2012-02-10
- Assignees: Homag GmbH
- Applicants: Homag GmbH
- Inventors: Axel Petrak
- Web page: https://patentgrep.com/patent/US10442031B2

## CPC

- B23K 26/0006: {taking account of the properties of the material involved (B23K26/32, B23K26/40 take precedence)}
- B23K 1/0056: {soldering by means of beams, e.g. lasers, electron beams [EB]}
- B23K 26/035: Aligning the laser beam (automatically B23K26/042)
- B23K 26/08: Devices involving relative movement between laser beam and workpiece
- B23K 26/20: Bonding (soldering by means of radiant energy B23K1/005)
- B23K 26/702: {Auxiliary equipment}
- B27D 5/003: {securing a veneer strip to a panel edge (fitting a tenonned strip to a grooved panel edge B27M3/0026)}
- B29C 63/003: {continuously}
- B29C 63/0065: {Heat treatment}
- B32B 37/10: characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
- B32B 37/1207: {Heat-activated adhesive (B32B37/04 takes precedence)}
- B29C 65/1619: {Mid infrared radiation [MIR], e.g. by CO or CO2 lasers}
- B29C 65/1632: {direct heating the surfaces to be joined}
- B29C 65/1658: {scanning once, e.g. contour laser welding}
- B29C 65/1674: {making use of laser diodes (B29C65/167 takes precedence)}
- B29C 65/48: using adhesives {, i.e. using supplementary joining material; solvent bonding}
- B29C 66/112: {Single lapped joints}
- B29C 66/114: {Single butt joints}
- B29C 66/472: {said single elements being substantially flat}
- B29C 66/83411: {Roller, cylinder or drum types (B29C66/83431 takes precedence; rollers, cylinders or drums moving relative to and tangentially to the parts to be joined B29C66/8362)}
- B32B 2037/1253: {curable adhesive}
- B32B 2310/0843: using laser
- B23K: SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B27D: WORKING VENEER OR PLYWOOD (applying liquids or other fluent materials to surface in general B05; grinding, sanding, or polishing of wood B24; applying adhesives or glue to surfaces of wood B27G11/00; manufacture of veneer B27L5/00)
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM

## Abstract

The present invention relates to devices with which, for example, narrow surfaces of preferably plate-like workpieces can be provided with a coating material. The device includes a laser for outputting a laser beam to a laser beam emitter, wherein the laser beam is directed onto the coating material or onto the workpiece in such a manner that the laser beam forms a plane of reference with solder on the surface of the coating material or the workpiece.

## Claims

### Claim 1

A method for activating an adhesive agent provided on a coating material of a workpiece, comprising
using a movement device to move the coating material or workpiece;
outputting a laser beam from a laser to a laser beam emitter,
directing the laser beam to the coating material or the workpiece such that the laser beam forms a plane of reference perpendicular to a surface of the coating material or the workpiece,
utilizing more p-polarized light than s-polarized light in the plane of reference within the laser beam;
activating the adhesive agent provided on the coating material with the laser beam,
and pressing the coating material with a pressure roller onto the workpiece after activation of the adhesive agent, wherein the laser beam forms an angle of 20°-30° in respect to a plane of the coating material or the workpiece.

### Claim 2 (depends on 1)

The method according to claim 1, characterized in that more than 75% of p-polarized light is present in the plane of reference.

### Claim 3 (depends on 1)

The method according to claim 1, characterized in that almost exclusively p-polarized light is present in the plane of reference.

### Claim 4 (depends on 1)

The method according to claim 1, wherein the method further comprises using a deflection mirror or prism to deflect the laser beam.

### Claim 5 (depends on 1)

The method according to claim 1, characterized in that the light of the laser beam comprises direct radiation.

### Claim 6 (depends on 1)

The method according to claim 1, characterized in that the laser emits a laser beam with only a particular polarization and wherein the laser is selected from the group consisting of a diode laser, a fiber laser, a CO2 laser and a solid state laser.

### Claim 7 (depends on 1)

The method according to claim 1, further comprising a movement device for moving the workpiece.

### Claim 8 (depends on 1)

The method according to claim 1, wherein the laser beam forms an angle from 20-27° with the plane of the coating material or the workpiece.

### Claim 9 (depends on 1)

The method according to claim 1, wherein the coating material with the adhesive agent comprises a coextruded material.