JP2000167806A - Multilayer ligneous tape and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a multilayer ligneous tape which is free from curling tendency and a fine split generated in a cut section and is provided with optimum characteristics corresponding to use easily. SOLUTION: A multilayer ligneous tape 20 is formed by joining a continuous resin sheet 4 which is obtained by impregnating resin into nonwoven paper, at least two layers on the rear of a continuous sliced veneer 3. Hardness and softness are made optimum by preparation of the continuous resin sheet 4. Regulation is easily performed so as to equip the optimum characteristics corresponding to use. Even when the multilayer ligneous tape 20 is rewound from a roll, curling tendency is hardly formed. In the case of sticking the same to base material, workability is good. Further, it differs from a case using many natural fancy woods and a unit cost is inexpensive and working is simple and generation of a crack and joining failure are difficult to be caused and the rate of generation of a defective is low. Moreover, a fine split is not generated in a cut cross section and after-working at time of application is easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multilayer wood tape used as a surface finishing material for furniture, building materials and the like, and a method for producing the same.

[0002]

2. Description of the Related Art A wood tape is known in which a continuous backing sheet made of nonwoven paper or the like is joined to the back surface of a continuous veneer formed by connecting a plurality of extremely thin veneers in a row.

[0003] As shown in FIG. 7, this woody tape covers an edge of a base material x such as a stair made of laminated wood, for example, and presents an appearance as if it were a single board made of a precious wood. It is used as a finishing material and repair material. By the way, the adhered surface of the substrate x has irregularities on the surface,
In the case of a thin wood tape, the unevenness appears on the tape surface, and thus a thick tape is required. Also, as shown in the figure, the wood tape joined to the leading edge of the stairs is chamfered, and therefore, similarly, it needs to be thick, and the cut surface is also a wood surface. It must not be uncomfortable.

Therefore, conventionally, as disclosed in Japanese Utility Model Publication No. Hei 8-9161, 0.03
A few sheets of wood tape on which a continuous backing sheet with a thickness of about mm is pasted and joined together in the form of a stack to achieve the required thickness, while exposing the edge of the veneer on the cut surface and cutting it. The surface was made to have a woody feel.

[0005]

However, the above-mentioned multilayer wood tape in which a plurality of veneers are laminated together with a backing sheet is too stiff and inflexible. When it is wound up, it tends to have a winding habit and cannot be rewound in a straight line. When performing secondary processing, a step for flattening is required, or the tape is curved and joined. In such a case, there was a problem that workability deteriorated. In addition, the edge of each protruding plate was crispy on the cut surface, requiring post-processing, and the construction was troublesome. Furthermore, since a large number of veneers made of precious wood are used, the unit price is high, and the rate of occurrence of defective products due to cracks and defective joints during manufacturing is high, and the yield is poor. Furthermore, it is desirable that the characteristics such as hardness and flexibility are optimal depending on the application. However, in the conventional configuration, the laminated structure of the veneers was not used, and the adjustment could not be performed.

An object of the present invention is to provide a multilayer wooden tape which does not have the drawbacks of the conventional structure and to provide a manufacturing method capable of optimally manufacturing such a multilayer wooden tape.

[0007]

According to the present invention, two or more continuous resin sheets formed by impregnating nonwoven paper with resin are joined to the back surface of a continuous veneer in which a plurality of extremely thin veneers are connected in a row. It is a multilayer wood tape characterized by the following.

As the continuous resin sheet, pulp,
A nonwoven paper mainly composed of rayon, hemp, cotton or the like impregnated with an acrylic resin, a melamine resin or the like and having a thickness of about 0.21 to 0.60 mm can be suitably used. Here, since the thickness of the veneer is about 0.5 mm, this continuous resin sheet is about the thickness of the veneer. The non-woven paper that is not impregnated with resin is about 0.03 to 0.20 mm. In this way, it is possible to increase the wall thickness by impregnating the resin, and by selecting the resin, it does not have a curl, and By preparing a continuous resin sheet, it is possible to easily obtain a sheet having optimal flexibility according to the application. This resin sheet is an industrial product and has a uniform thickness due to the characteristics of the material.

Here, the continuous resin sheet may be a wood-colored resin sheet such as light brown. Thereby, when the cut surface is exposed as shown in FIG.
It becomes possible to give a woody feeling to the cut surface.

[0010] In the multilayered wood tape having such a structure,
Running the continuous resin sheet in a tension state, applying an adhesive to the upper surface thereof, supplying the continuous protruding plate from above, superimposing the back surface on the application surface of the adhesive,
A first step of joining a continuous veneer to a continuous resin sheet to form a surface tape, a second step of joining two continuous resin sheets to form a base-side two-layer sheet, and a front-side two-layer Good manufacturing can be achieved by sequentially performing the third step of joining one or more base-side two-layer sheets to the lower surface of the sheet.

In the first step of the above construction, when the continuous resin sheet is run in tension and an adhesive such as urethane resin is applied to the upper surface thereof by a roll coater or a hot melt applicator, the continuous Since the resin sheet has a uniform thickness, the supply amount of the adhesive is stable, and uneven application of the adhesive does not occur. Also, the continuous resin sheet has
By being impregnated with an acrylic resin, a melamine resin, or the like, the applied adhesive is hardly absorbed, so that uneven application does not occur and the adhesive can be saved. Further, since the application unevenness does not occur, the bonding strength is improved.

Further, since the continuous resin sheet is run, no tensile force acts on the butted portion of the continuous veneer plate, and no gap is formed in the butted portion even when the running speed is increased. Furthermore, since the continuous resin sheet has a uniform thickness, it does not meander even if the traveling speed is increased.

Here, the second step and the third step can be performed by the same means as in the first step. In this case, the second step is a joining step between the continuous resin sheets, and the third step is a joining between the top sheet and the lower surface of the continuous resin sheet of the base sheet. Is also good.

As described above, since the present invention is a multilayered wood tape using a veneer only on the surface, by manufacturing by the above-described manufacturing method, there is no uneven application of the adhesive, and the adhesive can be saved. In addition to this, the sheets can be firmly joined, the feed rate can be increased, and the production efficiency can be improved.

Here, by using a reactive hot-melt adhesive such as a urethane resin as an adhesive for bonding each sheet, it reacts with moisture in the air together with its natural cooling, cross-links and cures. Becomes For this reason, when applying a multilayer wooden tape to the base material x, heat may be applied in some cases. However, even if heat is applied, the continuous resin sheet and the veneer do not peel off, resulting in stable quality.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the accompanying drawings. 1 and 2 show a multilayer wooden tape 20 according to one embodiment of the present invention. Here, this multilayer wooden tape 20 is formed by joining three continuous resin sheets 4 to the back surface of the continuous veneer plate 3.

The multilayer wooden tape 20 has a total thickness of, for example, about 1.5 mm to 2 mm, and the continuous veneer 3 has a thickness of 0.5 m.
m, the continuous resin sheet 4 has a thickness of 0.38 mm. Here, the continuous veneer 3 is formed by connecting a plurality of ultra-thin veneers made of precious wood in a row, and the continuous resin sheet 4 is made of a non-woven paper made of pulp, rayon, hemp, cotton, or the like. %), A melamine resin (0.5% by weight) and the like. The nonwoven paper is colored paper such as light brown, and therefore, the continuous resin sheet 4 is also made of a wood-colored resin sheet.

Next, the means for producing the multilayered wood tape 20 having the above-described structure will be described. This multilayer wood tape 20
After forming the continuous veneer 3 from the ultra-thin veneer 1, as shown in FIG. 4, one continuous resin sheet 4 is joined to the lower surface of the continuous veneer 3 to produce the front-side double-layer sheet 21. One step, a second step in which two continuous resin sheets 4 are joined to each other to produce a base-side two-layer sheet 22, and the base-side two-layer sheet 22 is joined to the lower surface of the front-side two-layer sheet 21 It is manufactured by executing the third step.

The manufacturing process of the continuous veneer 3 will be described with reference to FIG. First, a thickness of 0.3 to 1.0 mm obtained by cutting wood using a woodworking slicer or rotary lathe
As shown in FIG. 3A, the very thin protruding plate 1 is cut into a predetermined shape. The width of the extremely thin veneer 1 obtained by this shaping is about 50 mm to 300 mm, and is determined according to the use.

Both ends of the ultra-thin protruding plate 1 are subjected to finger joint processing, and as shown in FIG. The joint edges 1a and 1b are formed. Then
The joint edges 1a and 1b are butted together, and a temporary fixing tape 2 is provided on the upper surface of the butted portion as shown in FIG.
Are bonded to form a continuous protruding plate 3 by connecting a plurality of ultra-thin protruding plates 1 in a line. The continuous protruding plate 3 is wound into a roll shape as it becomes longer.

The temporary fixing tape 2 temporarily fixes the butted portion until the connecting of the butted portion is completed by a continuous resin sheet 4 to be described later bonded to the back surface of the continuous veneer plate 3. 3 is removed in a grinding step after joining the continuous resin sheet 4 to the continuous resin sheet 4.

On the other hand, the continuous resin sheet 4 is mainly made of pulp, rayon, hemp, cotton, etc., and is impregnated with acrylic resin, melamine resin, etc., and is a relatively thick nonwoven paper having a thickness of about 0.21 to 0.60 mm. Consists of Actually, as described above, one having a thickness of 0.38 mm is used. The resin impregnated in the continuous resin sheet can be appropriately prepared depending on the application. These nonwoven papers are industrial products, and their thickness is uniform due to the properties of the materials. The continuous resin sheet 4 is formed to have the same width as the continuous protruding plate 3, and is wound in a roll shape.

Next, the first step for manufacturing the front-side double-layer sheet 21 will be described. As shown in FIG. 4, a feeding machine 5A and a winding machine 6 arranged at predetermined intervals at front and rear positions.
The continuous resin sheet 4 is run around by winding the continuous resin sheet 4 between the rolls and winding the continuous resin sheet 4 attached to the feeder 5A while rewinding the same. Here, the winding machine 6 is rotationally driven in the winding direction, and the rotation of the unwinding machine 5A is controlled so as to idle in a slightly braking state, so that the continuous resin sheet 4 runs in a tension state. I have.

The adhesive 8 (see FIG. 5) is continuously applied to the upper surface of the continuous resin sheet 4 running in a tension state. The adhesive 8 may be a urethane-based, vinyl acetate-based, acrylic-based adhesive applied by a roll coater 7 or a quick-drying reactive hot-melt adhesive applied by a hot-melt applicator (not shown). Is used. The roll coater 7 is provided with a pair of front and rear pressing rollers 9b, 9b at a lower portion thereof.
b, 9b to form a continuous resin sheet 4 into a roll coater 7
Surface contact with the peripheral surface of the main roller 9a.
The adhesive 8 can be applied well.

Here, by using a reactive hot melt adhesive such as a urethane resin as an adhesive for joining the sheets 3 and 4, it reacts with moisture in the air together with its natural cooling, cross-links and cures. Will be done. For this reason,
When the multilayer wood tape is applied to the base material as a finishing material, heat may be applied in some cases. However, even when such heat is applied, the continuous resin sheet and the veneer do not peel off, and the quality is stable.

The continuous resin sheet 4 coated with the adhesive 8 is conveyed by a conveyor 10 driven and controlled at the same speed, and the roll-shaped continuous protruding plate 3 mounted on the feeder 5B is viewed from above. 5, the tape is supplied while being rewound so that the surface to which the temporary fixing tape 2 is attached faces upward, and the back surface of the continuous protruding plate 3 is continuously overlapped with the surface to which the adhesive 8 is applied. Free rollers 11
Press with. Next, after being heated and semi-dried by the heater 12, pressure is applied by the roll press 13 to join the continuous protruding plate 3 to the continuous resin sheet 4, which is wound into a roll by the winder 6. When a reactive hot-melt adhesive is used as the adhesive 8, the drying process by the heater 12 is unnecessary because of quick drying.

The continuous veneer plate 3 on which the continuous resin sheet 4 is backed is left in a roll form for a few days and cured, and then sent to a grinding process where its surface is ground by sanding. Thus, the temporary fixing tape 2 is removed, the surface is smoothed, and the thickness is adjusted to a predetermined thickness. As a result of this sanding process, the seam between the joint edges 1a and 1b of the ultra-thin protruding plates 1 and 1 almost disappears, and the continuous protruding plate 3 has the appearance of a single sheet that is seemingly continuous. Is completed. The front side two-layer sheet 21 is wound into a roll.

In this configuration, when the adhesive 8 is continuously applied to the upper surface of the continuous resin sheet 4 running in a tension state by the roll coater 7 or the hot melt applicator, the continuous resin sheet 4 has a uniform thickness. Because
The application amount of the adhesive 8 by the roll coater 7 or the hot melt applicator can be stably and uniformly applied, and the application of the adhesive 8 does not become uneven. Thereby, the joining strength between the continuous resin sheet 4 and the continuous protruding plate 3 can be improved, and a strong and non-peelable joining state can be obtained.

Further, in the continuous resin sheet 4 described above, since the acrylic resin, melamine resin or the like is impregnated, the applied adhesive 8 is hardly absorbed. At this time, when a reactive hot melt adhesive is used as the adhesive 8, since it is quick-drying, it starts to harden immediately after application, so that absorption by non-woven paper is less likely to occur. For this reason, uneven coating does not occur, and the adhesive 8 can be saved. Further, since the application unevenness does not occur, the joining strength is improved, and the joining between the continuous resin sheet 4 and the continuous protruding plate 3 becomes possible.

On the other hand, in parallel, a second step of manufacturing the base material side two-layer sheet by joining the two continuous resin sheets 4 and 4 to each other is executed. In this second step, only the continuous veneer plate 3 of FIG. 4 is replaced with one continuous resin sheet 4,
This is the same as the first step, and the description is omitted. Even in such a step, the adhesive 8 is applied to the upper surface of the continuous resin sheet 4 by causing the one continuous resin sheet 4 to travel in a straight line.
The same effect as described above is achieved.

The two-layer sheet 21 on the front side and the two-layer sheet 22 on the base material thus manufactured are connected to each other in a third step to form a multilayer wooden tape 20 having a continuous veneer 3 on the surface. It will be manufactured. Here, the substrate-side two-layer sheet 22 is connected to the continuous resin sheet 4 on the lower surface of the front-side two-layer sheet 21, and the third step is also the joining of the continuous resin sheets 4 and 4. Therefore, any of the front-side double-layer sheet 21 and the base-side double-layer sheet 22 may be run straight. In this step also, since the continuous veneer 3 and the continuous resin sheet 4 of the first step are replaced by the front-side two-layer sheet 21 and the base-side two-layer sheet 22, the lower surface of the front-side two-layer sheet 21 is removed. The same apparatus and the same steps as those of the first step can be used as they are, except that they are set so as to be joined. FIG. 6 shows the joining process. The other parts are the same as those in FIG.

The multilayer wood tape 20 manufactured in this way has a continuous veneer plate 3 provided only on the front surface and a plurality of continuous resin sheets 4 laminated on the back surface thereof. The continuous resin sheet 4 has substantially the same thickness as the continuous protruding plate 3, and the hardness and flexibility are
By adjusting the amount of the resin to be impregnated into the nonwoven paper and the material of the resin, it is possible to optimize the resin according to the application. For this reason, it is possible to achieve the thickness of the multilayered wood tape obtained by laminating a plurality of conventional veneers, and it is difficult to form a winding habit even after being wound up in a roll shape and then rewound. Good nature. Also, unlike those using a large number of natural precious woods, the unit price is low, the processing is easy, the cracks are not easily generated, the joining failure is not likely to occur, and the incidence of defective products is low.

Further, the continuous resin sheet 4 may be a wood-colored resin sheet such as a light brown color. In this case, the cut surface is exposed by the chamfering y as shown in FIG. In addition, the cut surface can be made to have a woody feeling, and a more excellent finish can be obtained.

[0034]

According to the present invention, as described above, a continuous resin sheet obtained by impregnating a nonwoven paper with a resin is joined to two or more layers on the back surface of a continuous veneer plate. Finish material can be formed, and when applied to the surface to be adhered of a substrate having irregularities, the irregularities are absorbed, and the surface after application can be smoothed, and the continuous resin sheet By the preparation, the hardness and the flexibility can be optimized, and it is easy to adjust to the one having the optimal characteristics according to the use.
Good workability when affixing to a substrate. Also, unlike those using a large number of natural precious woods, the unit price is low, the processing is easy, the cracks are not easily generated, the joining failure is not likely to occur, and the incidence of defective products is low. In addition, there is no cut on the cut surface, and post-processing during construction is easy.

Further, the continuous resin sheet 4 can be a wood-colored resin sheet such as a light brown color. In this case, the cut surface is exposed by the chamfering y as shown in FIG. In addition, it is possible to give a woody feeling to the cut surface.

Further, the continuous resin sheet is run in a tension state, an adhesive is applied to the upper surface thereof, the continuous veneer is supplied from above, and the back surface thereof is superimposed on the surface to which the adhesive is applied. In the above-described method for manufacturing a multilayered wood tape including the first step of joining a continuous veneer to a continuous resin sheet to form a surface tape, an adhesive is provided on the continuous resin sheet that has been run in tension. Since the continuous resin sheet has a uniform thickness, the supply amount of the adhesive is stable, and the applied adhesive is hardly absorbed, so that application unevenness does not occur, and the bonding strength is reduced. Can be improved and adhesives can be saved. In addition, since the continuous resin sheet travels, no tensile force acts on the butted portion of the continuous veneer, and even if the traveling speed is increased,
Since there is no gap in the butted portion, and since the continuous resin sheet has a uniform thickness, it does not meander, thereby improving production efficiency.

[Brief description of the drawings]

FIG. 1 is a vertical sectional side view of a multilayer wooden tape 20 according to one embodiment of the present invention.

FIG. 2 is a perspective view of a multilayer wooden tape 20 according to one embodiment of the present invention.

3A and 3B show a manufacturing process of the continuous veneer 3; FIG. 3A is a perspective view before the ultra-thin veneer 3 is connected; FIG. 3B is a plan view before connection of the ultra-thin veneer subjected to finger joint processing. 3C is a side view of a continuous veneer formed by connecting extremely thin veneers.

FIG. 4 is a schematic view of a first step.

FIG. 5 is a partially enlarged side view of a bonding step in FIG. 4;

FIG. 6 is a partially enlarged side view of a third step.

FIG. 7 is a vertical sectional side view showing an example of use of the multilayer wooden tape 20.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ultra-thin veneer 3 Continuous veneer 4 Continuous resin sheet 20 Multi-layer wood tape 21 Front side two-layer sheet 22 Base material side two-layer sheet

Continued on front page F-term (reference) 2B002 AA03 AA04 AB03 BA02 BA13 BA19 BB06 DA04 DA06 2B250 AA01 AA13 BA02 BA03 BA05 CA11 DA04 EA01 EA13 FA21 FA28 FA31 GA03 HA01 4F100 AK01B AK01C AK25 AK36 AK51 BA10 BA03 BA03 BA03 BA03 BA03 BA03 DG10C DG15B DG15C EC012 EC182 EH012 EJ192 EJ82B EJ82C GB07 GB81 HB01B HB01C JK14 JL02 JL10B JL10C JM02A

Claims (3)

[Claims] The present invention is characterized in that two or more continuous resin sheets obtained by impregnating nonwoven paper with a resin are joined to the back surface of a continuous veneer in which a plurality of ultra-thin veneers are connected in a row. Multi-layer wood tape. 2. The multilayer wood tape according to claim 1, wherein the continuous resin sheet is a wood-colored resin sheet. 3. Production of a multi-layered wood tape in which two or more continuous resin sheets obtained by impregnating a nonwoven paper with a resin are joined to the back surface of a continuous veneer in which a plurality of ultra-thin veneers are connected in a row. A method, wherein the continuous resin sheet is run in a tensile state, an adhesive is applied to an upper surface thereof, and the continuous veneer is supplied from above, and a back surface thereof is overlapped with the adhesive applied surface. A first step of joining a continuous veneer to a continuous resin sheet to form a front-side two-layer sheet, and a second step of joining two continuous resin sheets to form a base-side two-layer sheet, A third step of joining one or a plurality of base-side two-layer sheets to the lower surface of the front-side two-layer sheet.