JPS5914908A - Manufacture of decorative veneer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] This invention relates to a method for manufacturing decorative veneers.

A decorative veneer in which multiple sheets of veneer are laminated with an adhesive, pressed and bonded to obtain a laminated flitch, and this laminated flitch is sliced in a direction that intersects the laminated surface to reproduce a natural wood grain pattern. In the manufacturing method, colored paper colored in the summer wood color is sandwiched between the veneers of the material to represent the summer wood found in coniferous trees such as cedar, pine, and cypress in the wood grain pattern to be reproduced. A well-known method is to use paper to represent all of the summer wood, and to use veneer to represent the spring wood.

However, colored papers such as kraft paper have poor slicing properties compared to raw veneers, and the blades are subject to severe wear.Furthermore, the resulting sliced veneers have unevenness caused by the veneer and paper parts. The problem was that it could be done.

Therefore, the purpose of this invention is to improve the overall slicability and
And to provide a method for manufacturing a decorative veneer which can eliminate unevenness of the sliced veneer and also can form a summer wood part resembling a natural wood grain pattern.

A first embodiment of this invention will be described based on FIG.

In other words, the method for manufacturing this decorative veneer is shown in Figure 1g1 (a).
As shown in FIGS. 1(a) and 1(b), fibrous sheets 1 colored in summer wood color and spring wood material veneers 2 are alternately laminated via an adhesive. Then, the flitch 4 was obtained by pressing and gluing with the concave-convex die 3 ((C) in the same figure).
A decorative veneer 6 is obtained by slicing this to reveal the summer wood portion 5.
((d) and (e) in the same figure).

Here, the fibrous sheet 1 employs a wet-laid nonwoven fabric made of a mixture of pipe and rayon.

By using such a fibrous sheet 1.

The slicability is improved compared to the conventional case of using paper, and the decorative veneer 6 is free from irregularities. On the other hand, instead of one paper, I used vinylon.

When using non-woven fabrics such as polyester and acrylic.

Since the strength of these fibers themselves is thicker than that of wood fibers, they have poor slicability and are difficult to color, which is not preferable. Furthermore, in the case of a nonwoven fabric that is a complete mixture of fibers such as vinylon, polyester, or acrylic, and pipes, the slicability is poor due to the strength of the fibers themselves, and it is difficult to uniformly color these dissimilar materials. Furthermore, in the case of nonwoven fabrics, dry nonwoven fabrics use long fibers, so the fibers are fluffy and randomly oriented, so they lack a natural feel. In this way, all of the materials currently used for summer clothing that have been studied have slicability,
It had various problems in terms of dyeability, reproducibility of summer wood parts, etc., and was not satisfactory.

On the other hand, when using a wet-laid nonwoven fabric completely mixed with Noklube and rayon as described above, the slicability and dyeability are significantly improved, and the resulting decorative veneer 6 also has a natural texture with no unevenness. A completely new fact was discovered that it is possible to express the summer wood section 5, which is rich in color.

The wet nonwoven fabric is a mixture of rayon and glue.

It is obtained by using polyvinyl alcohol or the like as a binder. In this way, by mixing rayon with globulin, it also has the advantage of being cheaper than rayon alone. The mixing ratio of rayon and pulp can be determined as appropriate, but it is not preferable to use rayon alone and polyvinyl alcohol as an indizer because the slicability and dyeing properties will be poor.

Next, the method for manufacturing the decorative veneer of this example will be explained using test examples.

Test example 1 Shina rotary veneer 1 dyed in the color of pine wood as a material veneer
．． 0 key was used. On the other hand, a wet non-woven fabric (thickness: 0.1 ym) made from 50% rayon, 45% pulp, and 5% indica (colored with pigment to the color of powdered charcoal material) was used for the summer wood section.

Apply 120 to 130 y/- of adhesive to the veneer of the material, place the colored nonwoven fabric on top of it, and then place (5) -A. Then, the adhesive was cured to obtain a composite veneer. Multiple sheets of this composite veneer were laminated with adhesive in a concave-convex mold, pressed and bonded to obtain two flitches, and then a predetermined thickness was obtained. A decorative veneer was obtained by slicing it into pieces.This product had an extremely natural feel, resembling natural pine.

Test Example 2 A nonwoven fabric with a thickness of 0.08 trm made of 50% rayon, 25% pulp, and 5% binder was used as the wet-laid nonwoven fabric. I got a decorative veneer.

Test example 3: 60cm of rayon and 35q of pulp as materials for expressing the summer wood part
Test Example J except that a coloring agent was mixed at the time of paper making with a blending ratio of 6 and a binder of 5% to give a powder material color.
In the same manner as above, a decorative veneer with an extremely natural feel resembling natural pine was obtained.

A second embodiment of the invention will be described based on FIGS. 2 and 3. In other words, as shown in Fig. 2, the manufacturing method for this decorative veneer is as follows: (6) of the material veneer 2'. A sheet piece 8, which is the same as the fibrous sheet forming the summer material part, is adhered to one side of the part 70.

In this way, by gluing the sheet piece 8 of the fibrous sheet to the repair part 7, the problem that the repair piece 71 cut into the material veneer 2' falls off during the adhesive application process can be avoided. can be prevented.

Furthermore, the sheet piece 8 is made of the same material and color as the fibrous sheet used to express the summer material.

Spring wood material veneer 2' having a repaired part 7 with sheet pieces 8 temporarily glued together and a fibrous sheet colored in summer wood color are alternately laminated, pressed and glued to obtain a flitch, and this is sliced. , Vi on the obtained decorative veneer, as shown in Figure 3, the line i of the summer wood part 5' is partially bent, giving it a more natural look.
It is possible to express all the natural wood grain patterns. In FIG. 3, a region A where the line width of the summer material portion 5' becomes thicker indicates a region where the sheet piece 8 is adhered.

Next, the method for manufacturing the decorative veneer of this example will be explained using a test example.

Test Example 4 Sina rotary veneer (material veneer was dyed in the color of pine wood, then knots in the veneer were punched out and repaired by patching (the repaired part was an oval shape with a major axis of 10 cul*minor axis 7c71+).

A piece of kraft paper colored in powdered charcoal color and coated with a two-component polyurethane adhesive was applied to one side of this part and adhered. Kraft paper is 0.125mm thick, long sleeve 15cm, short axis] Oa
An oval shaped one was used.

Next, apply adhesive i 110 to 12 on the repaired veneer of the material.
A layer of kraft paper colored in the same powdered charcoal color as above was placed on the entire surface of the veneer, and these sheets were then glued together using release paper using soft pressure and tightness. A composite veneer to which colored kraft paper was glued was obtained. Multiple pieces of this composite veneer were laminated with an adhesive in a concave-convex mold, pressed and bonded to obtain a flitch, and this was sliced to obtain a decorative veneer with a wood grain pattern very similar to natural pine. .

A third embodiment of the present invention will be described based on the fourth example.

That is, as shown in Fig. M4, this decorative veneer manufacturing method involves continuously feeding out a fibrous sheet 1' from a drum 9, applying or impregnating it with an adhesive 10, and folding the adhesive-containing fibrous sheet 11. A material veneer 2' is interposed between each folded sheet.

With this configuration, there is no need to carry out the composite process of combining wood veneers and fibrous sheets, or to transport the composite veneers, as was adopted in the test example in the above-mentioned embodiment, and flitching can be done in one step. can be created, greatly improving productivity. In addition, when using a water-curing adhesive such as urethane resin as an adhesive, if it is applied onto the material veneer 2', the pot life may be shortened due to the moisture contained in the material veneer 2N. Since the moisture content of fibrous sheets such as paper or non-woven fabrics is several orders of magnitude at most, there is no risk that the pot life will be shortened.

The entire method for manufacturing the decorative veneer of the present invention will now be explained with reference to test examples.

Test Example 5 (9) As shown in Fig. 4, urethane adhesive was coated on both sides of vinylon nonwoven fabric (wet method, thickness 0, 05 mm) at a thickness of 120 to 130 Y/-, and folded to form a single sheet. A total of 150 boards were laminated, pressed and glued using a concave-convex mold to obtain a flitch, and then sliced to create a decorative veneer. The material used was Aius rotary veneer 1. Oar moisture content 3
It is adjusted to 0 to 50-.

Test Example 6 Urethane adhesive 130 on Kraft paper (thickness 5 mil)
A decorative veneer was obtained in the same manner as in Test Example 5 except that it was impregnated with ~150 y/-. The material veneer used was Shina rotary veneer (thickness: 1.0 wm) 'JFr: After dyeing in an appropriate color, the moisture content was set to 40 to 60%.

Test Example 7 In Test Example 6, uncolored kraft paper (basis weight 120 y/y) gold was used as the fibrous sheet, and a ferric oxide pigment was added to the adhesive and kraft paper was used at the same time as the impregnation of the adhesive. The paper was colored charcoal wood. Here, the amount of adhesive adhered was 130 to 1409/d. The decorative veneer thus obtained had a clear summer wood part and a grain pattern very similar to natural pine. This is because, since the colored adhesive is applied to the sheet, the penetration of the pigment into the veneer is reduced compared to the case where the colored adhesive is applied to the veneer.

A fourth embodiment of this invention will be described. In other words, this decorative veneer manufacturing method involves pressing and bonding a wet fibrous sheet in which water is retained in the fibrous sheet and a material veneer using a water-curing adhesive such as urethane resin. .

Conventionally, water contained in the veneer has been used to supply water to water-curing adhesives, but this method had the problem of requiring strict control of the moisture content of the veneer.

Therefore, if the fibrous sheet is made to retain all of the moisture as described above, the moisture content can be easily adjusted and the moisture can be completely evenly impregnated.

Work efficiency and productivity can be completely improved.

Next, the entire method for manufacturing the decorative veneer of the present invention will be explained with reference to test examples.

Test Example 8 A 1° Otin material veneer (shina rotary veneer) was dyed in the color of pine spring wood, and the moisture content was adjusted to a relatively wide range of 10 to 50.
I made it to Chi.

On the other hand, a fibrous sheet (paper, absolute dry basis weight 12Of/m"
) k to attach this and the veneer with a water-curing adhesive (110
~x3oy/lr? ) A flitch was obtained by pressing and gluing with a concave-convex mold through a k-shaped plate, and a decorative veneer was created by slicing.

Test Example 9 Material veneer (shina rotary veneer) with a moisture content of 20 to 60% and a thickness of 1.0 yen and a moisture content of 50 to 60% and an absolute dry basis weight of 50 y
/ m” of vinylon nonwoven fabric, and a water-curable adhesive (7
0-90? /rr? ) A decorative veneer was obtained in the same manner as in Test Example 8, except that the veneer was pressed and bonded using a veneer.

Other examples of the decorative veneer manufacturing method of the present invention will be described below.

In other words, when non-woven fabric is used as the summer material, 1
Since the coloring is uniform, there is a problem in that it is not possible to express uneven summer wood parts with uneven coloring.

Therefore, when a nonwoven fabric is dipped in or coated with a dye liquid such as ink or a pigment liquid, and then a large number of nonwoven fabrics 12 are stacked and dried as shown in Fig. 5, the solvent containing the colorant migrates and overlaps. This transfers to the upper and lower surfaces of the nonwoven fabric, resulting in an unusual summer material with uneven color. At that time, as shown in FIG. 5, an impermeable thin resin film 13 (
For example, by inserting a 10 μm thick polyester film, etc., the colorant is prevented from migrating on the lower surface of this resin film 13, and color unevenness can be formed even within a single sheet of nonwoven fabric 12. In addition, in order to create a summer wood part with an even more natural feel, we impregnated a nonwoven fabric that had been colored in the summer wood color in advance with water, and then one side of this (
A coloring solution in which an oil bath dye is dissolved in an organic solvent (for example, ethyl acetate) that is incompatible with water is applied by spraying or the like to both surfaces (if necessary), and then dried by heating. In this way (13), since the inside of the nonwoven fabric is impregnated with water,
Since the oil-soluble dye is prevented from penetrating into the interior, and the organic solvent is evaporated first by heating and drying, a thin colored layer can be formed at the interface of the nonwoven fabric. The decorative veneer using this non-woven fabric as a material to express the summer wood part has a thin dark colored part expressed in the summer wood part 5', as shown in Figure 6, and has a pattern that is very close to the natural wood grain pattern. Become.

According to yet another example, wrinkles can be prevented when a nonwoven fabric is used as the material for the summer material. That is, as shown in Tomb 7 (a), the spring material veneer 21
A nonwoven fabric 14' is laminated with an adhesive on top of the nonwoven fabric 14', and a release sheet (not shown) is placed on top of the nonwoven fabric 14' and then pressed and bonded.
In the conventional pre-process to obtain the composite veneer 15', wrinkles 16 tend to occur in the nonwoven fabric 14' during pressing, and if the nonwoven fabric 14' is formed and sliced as is, wood grains will appear on the decorative veneer 6' as shown in FIG. 7(b). It appears as defective 17. Therefore, as shown in FIG. 8, a roll coater 19 is applied to a release sheet 18 such as a polypropylene film or sheet.
) amount of adhesive (for example, urethane adhesive) is applied, temporarily bonded to the nonwoven fabric 14 using a roll press 20, and then cut to a predetermined length and bonded onto the material veneer to prevent wrinkles from forming. It is also possible to improve productivity.

As described above, the method for producing a decorative veneer of the present invention involves laminating a fibrous sheet colored in the color of summer wood, a material veneer for spring wood, and a veneer using an adhesive, and then forming a flitch by pressing and bonding the veneer. By slicing this, the slicability is improved and a summer wood portion resembling a natural wood grain pattern can be embedded.

[Brief explanation of the drawing]

Figure jI1 is the first 5j of this invention! Process explanatory diagram showing an example! Figure 2 is a sectional view showing a second embodiment of the invention, N
Fig. 3 is a front view showing an example of a decorative veneer obtained in the second embodiment, Fig. 4 is a process explanatory diagram showing the N3 embodiment of the present invention, and Fig. 5 is a treatment of the nonwoven fabric for expressing the summer material part. Figure 6 is a cross-sectional view showing the method, and Figure 6 is a front view showing an example of a decorative veneer obtained using a nonwoven fabric treated by another method. Figures N7 (a) and (b) are
) are respectively a perspective view of a conventional composite veneer having a wrinkled nonwoven fabric and a front view of a conventional decorative veneer obtained using this composite veneer, and FIG. 8 is a process explanation showing the wrinkle prevention treatment of the nonwoven fabric. It is a diagram. l...Fibrous sheet, 2...Material veneer, 4...Flitch, 5...Summer wood department, 6...Decorative veneer, 7...Repair department agent Akio I, patent attorney 〒==HISTORY 45- Figure 2 Figure 3 Figure 4 (a) (b) Figure 7

Claims (1)

[Claims] (1) A fibrous sheet colored in the color of summer wood and a veneer of material for spring wood are laminated via an adhesive, pressed and bonded to obtain a flitch, and this is sliced. A method for producing a decorative veneer characterized by: (2) The method for manufacturing a decorative veneer according to claim (1), wherein the fibrous sheet is a wet-laid nonwoven fabric made of a mixture of bulb and rayon. (3) A sheet piece identical to the fibrous sheet is bonded to at least one side of the repaired part by punching out the defective part of the wood veneer and notching it.
) The method for manufacturing the decorative veneer described in section 2. (4) The fibrous sheet is continuously folded while being coated or impregnated with an adhesive, and a veneer of material is interposed between each folded sheet and then pressed and bonded. (5) The method of manufacturing a decorative veneer according to the patent claim, wherein the fibrous sheet retains moisture, and the wet fibrous sheet and the material veneer are pressed and bonded together using a water-curing adhesive. A method for manufacturing a decorative veneer according to scope item (1).