JPS6067148A - Manufacture of laminated decorative veneer sheet - 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 The present invention relates to a method for manufacturing a laminated decorative veneer having oJ flexibility.

Decorative veneer is made by thinly slicing various precious woods to a thickness of about 0.2 to (L), and is used to attach it to the surface of plywood to obtain wood similar to precious wood.

Recently, the use of decorative veneer has become increasingly important due to the shortage of wood and the protection of natural resources. It is also used for applications such as laminating on the surface of fiberboard, etc. and pressing it with a mold with an uneven pattern to obtain a decorative board with a carved pattern, or pasting it on a curved surface using a vacuum laminator, roll press, etc. It's coming.

However, as mentioned above, decorative veneer is very thin,
Also, since it is made of wood, it has grain, so when trying to attach a veneer along a curved surface, it may break or break.
There were problems such as the wood being cut or cracks still appearing in the wood grain, making it impossible to obtain the desired product.

In order to solve these drawbacks, methods such as pasting paper on the decorative veneer or laminating plastic sheets have been proposed, but these methods have not always been satisfactory. That is, when laminating paper, if the paper is too thick, the paper will not have the same elasticity as decorative veneers to fold, and this will instead cause the decorative veneers to fold. There is the problem that it is difficult to select a paper with suitable physical properties, and since both paper and veneer are fibrous and absorbent, a large amount of adhesive must be used, and when doing so, the adhesive may be uneven. It is absorbed into the veneer and appears as a stain pattern on the surface of the veneer, spoiling its aesthetic appearance.

In the method of laminating folded plastic films, there are problems in that it is difficult to obtain a plastic film that has the desired physical properties because there are a limited number of plastic materials that can be used as films, and it also has to be laminated with an adhesive. It also has Therefore, a decorative veneer having desired flexibility cannot be obtained.

The present invention is intended to solve the above problems and provides a method for obtaining a laminated decorative veneer sheet having desired flexibility and thickness.

The present invention involves impregnating a fibrous sheet such as Japanese paper or non-woven fabric with a solution of a resin having adhesive properties, drying or partially curing the resin solution to form a sheet, and using this sheet as a fluororesin,
It is placed on a base plate-like non-adhesive member whose surface has been treated with silicone resin or the like to make it non-adhesive, and then a decorative veneer is layered on top of this sheet and pressure laminated using a press. The laminate is peeled off from a non-adhesive member.

In the present invention, the fibrous sheet is preferably thin paper such as rice paper or tissue paper, oro paper, thin nonwoven fabric, or the like. These fibrous sheets serve to hold the resin solution when it is applied. Therefore, those with good absorbency are preferred.

As the non-adhesive member, in addition to release paper coated with silicone resin, a plate made of fluororesin, polyethylene, or the like may be used. Fluororesins are advantageous because they are heat resistant.
Further, release paper is preferable because it is inexpensive and can be rolled up into nine rolls.

In the present invention, as shown in FIG.
In order to obtain a fibrous adhesive sheet whose surface is impregnated with a resin solution, the fibrous sheet may be immersed in a resin solution, pulled up and dried, but in the present invention, as shown in FIG. It is preferable to stretch the fibrous sheet 2 on the surface of the non-adhesive member 10, and then apply and impregnate it with a resin solution that provides desired physical properties. The resin solution may be applied by brushing, spray coating, or by using a squeegee cord.

The resin solution may contain an organic solvent or may consist only of resin. Various resins can be used as the resin, such as vinyl acid-vinyl chloride copolymer, epoxy resin, polyurethane, diallyl phthalate resin (DAP), and acrylic resin. It may be prepared separately by the usual method. Furthermore, natural rubber or synthetic rubber may be used as the resin in order to obtain appropriate flexibility.

1-711hI%-AZt-Spring PV It is preferable to have a small value of tree growth H7+=+J/j:/m [r)+Mk), good creep properties, and low heat recovery properties. For this reason, although it is preferable to use a thermosetting resin rather than a thermoplastic resin, it goes without saying that lamination to a curved surface during secondary processing is advantageous.

In the present invention, as described above, when a fibrous sheet is placed on a non-adhesive member and impregnated with a resin solution, the sheet acts as a holder, and the amount of resin solution exceeds that which can be impregnated into the sheet by the dipping method. This is advantageous because it allows a large amount of resin to be retained.

In the present invention, an adhesive sheet impregnated with resin is prepared in advance as described above, and this is placed on a non-adhesive member, and decorative veneers are stacked on top of each other and pressed or heated with a press. Alternatively, as shown in Fig. 2, a fibrous sheet is impregnated with a resin solution on a non-adhesive member to form an adhesive sheet 2', and then a decorative veneer 3 is stacked and laminated under pressure. You may also do so. The pressure bonding at this time may be such that the veneer 3 adheres to the sheet 2'.

Further, in the present invention, the resin solution may be applied so as to form a resin layer on the surface of the fibrous sheet without impregnating the resin solution until it reaches the back surface of the fibrous sheet. In this case,
Place the resin coated side on the non-adhesive material with the decorative veneer side facing,
Overlap the decorative veneers and press them together. Even in this case, the resin that permeates through the fibrous sheet when it is pressed is caught by the non-adhesive member.

Furthermore, the adhesive sheet may be made by first applying a resin solution onto the non-adhesive member and then placing the fibrous sheet thereon. On top of the fibrous sheets stacked in this manner, a decorative veneer is further stacked and bonded using a hot press or the like.

After laminating the decorative veneer 3 in this way, the non-adhesive member 1
Laminate A is peeled off from the surface to obtain the desired laminated decorative veneer sheet (see Figure 3).

In the present invention, as described above, since the resin solution is applied to the non-adhesive member by stacking the fibrous sheets, there is no possibility that the resin solution will stain the outside and stain other base materials. In addition, there was a problem that a film of the desired thickness could not be obtained by applying only a melted resin plate on a non-adhesive member, but a resin film of a desired thickness could not be obtained by using a fibrous sheet. Since the resulting resin film is reinforced with a fibrous sheet, it has the advantage of sufficient strength.

When using the method of the present invention, any desired resin can be selected from a wide range and desired physical properties can be obtained.

The resin solution may be colored if necessary, and a filler may be added thereto.

In addition, when using a release paper as a non-adhesive member, the release paper may be left attached at the same time as when using a laminated decorative veneer sheet. By doing this, the bonding surface is kept clean, making the bonding process advantageous.

In addition, in the present invention, since the decorative veneer is pressed against the decorative veneer when the resin impregnated into the sheet has a certain degree of viscosity or hardness, the resin will not be impregnated into the decorative veneer. It has many advantages, such as having original design effects and being able to be impregnated with a desired resin after being bonded to a target object. In addition, the decorative veneer laminated on the fibrous sheet 2 in the present invention is not a single piece, but small decorative veneers 5a, 3b, 3 cm° as shown in FIG.

may be arranged in a marquetry pattern.

The present invention will be explained below with reference to Examples.

Example 1 Made of Tetron fiber, basis weight 65t/n? A solution of butyral phenol resin is applied and impregnated onto the nonwoven fabric using a dipping method, and only the solvent is evaporated to dryness without curing the resin to obtain an adhesive sheet. This sheet had a gold coverage of ssf/rd.

Next, the above sheet was placed on an aluminum alloy plate treated with Teflon (fluororesin), and a thin natural wood veneer (thickness Q, 25wn) was placed on it.
was placed on top of that and hot-pressed.

The pressure bonding conditions were 130°C for 10 minutes and a pressure of 6 kgZ-.

Even when bonded to a curved surface (engraved pattern), it could be used satisfactorily without cracking or cracking.

Example 2 Adhesive j was applied with a spreader on the above non-adhesive member, Japanese paper (15f/rr?) and natural wood thin veneer (thickness 0.25111++1) were layered one after another on top of it and hot pressure pressed. did.

The press was 100°C, 1 minute, 7Kf/CITf,
The adhesive used was a mixture of 100 parts (by weight) of an ethylene-vinyl acetate copolymer emulsion and 15 parts of crosslinking, and the coating amount was 5 of/rrl on a dry basis.

Next, the thus obtained decorative veneer (Wt) sheet was vacuum-pressed to bond the curved surface, but no cracks, cracks, or cracks occurred.

Example 6 An aluminum alloy plate whose surface was treated with silicone 11)lW was used as a non-adhesive member, a non-woven fabric (same as in Example 1) was layered on this surface, and a culture enrichment agent was applied by spraying, and water and solvent were removed. After removing it by evaporation, decorative veneers (wood species: sakhi, thickness 0.25 m) were stacked and hot-press pressed to integrally laminate them.

The adhesive used was a mixture of 100 parts of a modified phenolic resin emulsion and 5 parts of a curing agent.

The amount of solids applied to the nonwoven fabric is 17'n? And so.

Further, the press was the same as in Example 2.

The thus obtained laminate was applied to a curved surface of a fiberboard using a mold press, but it adhered well without cracking or cracking.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing a state in which a fibrous sheet is laminated on a non-adhesive member, Fig. 2 is a sectional view showing a state in which the fibrous sheet is impregnated with a resin solution and a decorative veneer is laminated. The figure is a cross-sectional view of a laminated decorative veneer sheet of the present invention, and FIG. 4 is a cross-sectional view showing another embodiment of the present invention. In the figure: 1... Non-adhesive member 2... Fibrous sheet 3, 3a, 3b... Decorative single layer A... Laminated decorative veneer sheet and 1 other person jil'1 f! 1 spear 2 spear 3 Figure 24

Claims (1)

[Claims] A fibrous sheet such as Japanese paper or nonwoven fabric that has been coated or impregnated with resin in advance is placed on a non-adhesive member, or a resin solution is applied on the non-adhesive member and then a fibrous sheet is placed on the non-adhesive member. Alternatively, a fibrous sheet is placed on a non-adhesive member, a resin solution is applied and impregnated, and a decorative veneer is stacked and pressure-bonded on the fibrous sheet coated with the resin in this way, thereby forming a non-adhesive member. A method for manufacturing a laminated decorative veneer sheet, which is characterized by being peelable from the surface.