JPH07283B2 - Method for manufacturing laminated sheet material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a laminated thin plate material for a name wood veneer, which is attached to the surface of a wooden base material such as a building material or a furniture material to make the surface of the wooden base material into a natural wood shape. .

[0002]

2. Description of the Related Art Conventionally, when manufacturing a wood veneer veneer material,
An adhesive tape with a thickness of 0.05 to 0.1 mm is attached to the abutting part of a thin veneer veneer having a thickness of 2 to 0.6 mm to form a long veneer thin veneer, A non-woven fabric having a thickness of 0.05 to 0.1 mm is lined with an adhesive on the side opposite to the tape-adhering surface of the shakumei wood veneer, and the tape-adhering surface of this laminated plate is ground to scrape off the tape. The surface of the thin veneer veneer was ground and finished. As a conventional technique, there is JP-A-3-211004.

[0003]

The wood veneer material is bent according to the surface shape of the wood base material, and it is necessary to reduce the thickness of the veneer material in order to bend the wood veneer into a complicated shape. In the above-mentioned method for producing a single-ply wood veneer material, an adhesive in a fluid state is applied to line the non-woven fabric.
If a thin nameplate veneer with a thickness of about 0.25 mm is used, the adhesive passes through to the opposite side of the application surface and stains the opposite side or the contact part with the machine, so the thickness of the nameplate thin veneer Is required to be 0.35 to 0.45 mm or more, and there is a problem that the thickness of the nameplate thin veneer is limited and the cost becomes high, and the adhesive tape is scraped off from the long length nameplate thin veneer. In order to do this, the grinding allowance must be 0.15-0.25 mm, and about half of the thickness of the nameplate thin veneer is scraped off, so about half of the cost of the expensive and valuable nameplate veneer is wasted. However, there is a problem in that the product yield becomes poor and the product cost becomes high. The present invention aims to solve the above problems.

[0004]

According to the method for manufacturing a laminated thin plate material of the present invention, the abutting portions of a large number of thin veneers that are joined in the longitudinal direction are joined by joining tapes affixed to the abutting portions. Create a long seamed thin veneer and then have a structure in which a thin film that blocks the permeation of liquid is sandwiched integrally between two layers of non-woven fabric, and the heat-adhesive adhesive does not flow In the state where the backing material coated on one side in the state is overlapped on the joining tape sticking surface side of the seamed thin veneer, the seamed thin veneer and the backing material are heated and pressed to bond them together. It has the configuration as described above.

[0005]

[Function] A spliced thin veneer and a backing material, which are formed by joining the abutting portions of the thin veneer with a joining tape, are applied to the backing material to make them in a non-fluid state and have a thermal adhesive property. By bonding with an adhesive,
Adhesive to the back surface of the backing material by using a backing material with a thin film sandwiched between two layers of non-woven fabric to prevent penetration of the adhesive to the surface of the seamed thin veneer and to prevent liquid permeation Of the bonding tape is sandwiched between the seamed thin veneer and the backing material to reduce the grinding allowance when the surface of the seamed thin veneer is ground.

[0006]

As described above, according to the present invention, the backing material having the thin film is bonded to the seamed thin veneer with the heat-adhesive adhesive in the non-fluid state. It is possible to accurately prevent the penetration of the adhesive, prevent the adhesive from penetrating the surface of the seamed thin veneer, and eliminate the dirt on the front and back surfaces of the laminate due to the penetrating adhesive. This has the effects of improving the quality of the laminated thin plate material and enabling the use of a thin single plate having a thin plate thickness. Further, since the joining tape is sandwiched between the laminated thin veneer and the backing material 5, it is not necessary to scrape off the joining tape when grinding the laminated thin veneer. It is possible to grind with a minimum grinding allowance, and it is possible to reduce the thickness of the laminated thin plate material by reducing the plate thickness of the thin single plate.

[0007]

An embodiment of the present invention will be described below with reference to the drawings. The thin veneer 1 constituting the surface layer part of the laminated thin plate material A for a name tree veneer is made by cutting a natural wood such as a hardwood into a thin sheet having a constant width. In this example, the thickness of the thin veneer 1 is Is set in the range of 0.2 to 0.25 mm. At each end of each thin veneer 1 spliced in the longitudinal direction, a comb-toothed joint 1a having a plurality of tapered projections arranged in the width direction is formed by punching. .

In the production of the laminated thin plate material A, first, the joint parts 2 of the joint parts 1a of the two thin veneers 1 to be joined are abutted with each other without a gap, and they are joined by a joining tape 3 attached to one surface thereof. A large number of thin veneers 1 are sequentially spliced in the longitudinal direction to form a long spliced thin veneer 4 and wound into a roll.

The bonding tape 3 is an ultra-thin tape having a thickness of 0.03 mm or less, which is obtained by impregnating a tape base material with a heat-adhesive adhesive such as a polyvinyl acetate adhesive and then drying it. The joining tape 3 is formed on the abutting portion 2 of the thin veneer 1 from the lateral direction, and the joining tape is cut according to the width of the thin veneer 1 in a state of being superposed, and the joining tape 3 and the abutting portion 2 are cut. Is heated and pressed by a hot press device, the joining tape 3 is thermocompression-bonded to the abutting portion 2 to join the abutting portion 2.

Next, the backing material 5 having a three-layer structure, which is bonded to the long spliced thin veneer 4, is run together with the spliced thin veneer 4 while heat-bonding to the bonding surface of the backing material 5. The liquid adhesive 8 is applied by a coating device 9 having a knife coater 9a, the adhesive is dried by a drying device 10 until the fluidity disappears, and then the backing material 5 is applied in a non-fluid state. Of the long seamed thin veneer 4 on both sides of the spliced thin veneer 4 with the bonding tape 3 affixed with the bonding tape 3 while the spliced thin veneer 4 and the backing material 5 are hot pressed by the hot press roller 11. The laminated sheet 12 is created by continuously bonding the joining material 4 to the joining tape sticking surface 4a of the seamed thin veneer 4 by heating and pressing, and melting the backing material 5 with an adhesive. Four Sandwiched between the backing 5.

As the backing material 5, a three-layer structure in which a liquid-impermeable synthetic resin thin film 6 having the property of preventing the permeation of liquid such as water and solvent is sandwiched integrally between two layers of non-woven fabrics 7, 7. And a non-woven sheet having a thickness of 0.05 to 0.1 mm is used.

Next, the surface of the laminated sheet 12, that is,
The surface of the seamed thin veneer 4 lined with the backing material 5 is ground by a sanding device so that the grinding allowance is 0.05 to 0.1 m.
0.23 to 0.28 m when the grinding process is performed to obtain m.
It is possible to manufacture a laminated sheet material A having a thickness of m. The ground surface of the laminated thin plate material A is coated if necessary.

Next, the operation and effect of the embodiment having the above-mentioned structure will be described. In this example, when the laminated thin plate material A is manufactured, the abutting portions 2 of a large number of thin veneers 1 to be joined in the longitudinal direction are joined by the joining tapes 3 attached to the abutting portions 2 to form a long joint. A laminated thin veneer 4 is prepared, and then, a thin film 6 for preventing liquid permeation is integrally sandwiched between two layers of non-woven fabric 7, and a heat-adhesive adhesive is in a non-flowing state. In a state where the backing material 5 applied to one surface is overlapped with the joining tape adhering surface 4a side of the seamed thin veneer 4, the seamed thin veneer 4 and the backing material 5 are heated and pressed to bond them together. Then, the surface of the seamed thin veneer 4 lined with the backing material 5 is ground.

Therefore, according to the method of this embodiment, the backing material 5 having a three-layer structure including the thin film 6 is bonded to the seamed thin veneer 4 by the non-fluid state heat-adhesive adhesive. It is possible to accurately prevent the penetration of the adhesive into the back surface of the laminated thin plate material A, and to prevent the penetration of the adhesive into the surface of the seamed thin veneer 4, and the surface of the laminated thin plate material A by the penetrated adhesive. There is an effect that the dirt on the back surface is eliminated and the quality of the laminated thin plate material A is improved, and the thin single plate 1 having a thin plate thickness of about 0.2 to 0.25 mm can be used.

Further, the joining tape 3 is a spliced thin single plate 4
Laminated veneer 4 sandwiched between and
Since it is not necessary to scrape the joining tape 3 at the time of grinding, the spliced thin veneer 4 can be ground with a minimum grinding allowance, and the thin veneer 4 can be thinned to reduce the thickness of the laminated thin plate material A. Can be reduced.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention and showing a step of laminating a laminated thin veneer and a backing material.

FIG. 2 is a plan view of a main part of a seamed thin veneer.

FIG. 3 is an enlarged cross-sectional view of a laminated thin plate material.

FIG. 4 is an enlarged cross-sectional view of a backing material.

[Explanation of symbols]

 1 thin veneer 2 butt section 3 joining tape 4 spliced thin veneer 5 backing material A laminated thin plate material

Claims (1)

[Claims] 1. A long seamed thin veneer is produced by joining the abutting portions of a large number of thin veneers seamed in the longitudinal direction with a joining tape attached to the abutting parts. , A thin film for preventing liquid permeation is integrally sandwiched between two layers of non-woven fabric, and a backing material coated on one side with a thermo-adhesive adhesive in a non-flowing state A method for producing a laminated thin plate material, characterized in that the spliced thin veneer and the backing material are heated and pressed to be bonded together in a state of being laminated on the bonding tape sticking surface side of the single plate.