JPH02235739A - Manufacture of grain decorative sheet and board coated with vinylchloride resin - Google Patents

Abstract

PURPOSE:To enable the harmonized uneven surface corresponding to the grain of a wooden plate to be surely formed on the upper surface of a convex sheet or a board with excellent operational property by a method in which the synthetic resin film which is softened and melted when being press-tightened under heating, but has no adhesion to vinyl chloride resin, is inserted between the vinyl chloride resin film over laid on a wooden plate-stuck convex sheet and mirror surface plates, and then they are press-treated. CONSTITUTION:An uneven cloth 9 is coated with a water soluble styrene- butadiene thermosetting adhesive, and a wooden convex plate 2 is stuck thereto. A wooden plate-stuck convex sheet 3 is made by pressure-bonding said materials. The surface 7 of the wooden plate is coated with the polyurethane adhesive 4 of solvent type and is dried naturally. Next, a soft vinylchloride resin film 5 is superposed on the wooden plate-stuck convex sheet 3, and further thereon, low density polyethylene film 6 of convex thickness is placed. These materials are inserted between two metallic mirror surface-plates 20, 20, and are press- tightened under heating between the platens 21, 21 in a hot cold flat press, and then they are continuously press-tightened under cooling.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a polyvinyl chloride resin useful for surface decoration materials for furniture and office supplies, interior materials for buildings, and interior materials for ships, etc. This article relates to coated wood grain decorative sheets and boards and their manufacturing methods. (Prior Art) Conventionally, in the field of surface decorative materials, synthetic resin films, especially vinyl chloride resin films, have been applied to backing sheets and backing decorative boards in order to protect the surface and maintain aesthetic effects. A method is used to cover the This resin film coating has been conventionally used for example! ! 18
As can be seen with reference to FIGS. 7 and 8, first, 3 liters of adhesive is applied to the surface 7 of the proof plate such as the mockup sheet 3, and then a vinyl chloride resin film 30 is layered on top of it, and then this laminate is The basic procedure is to place two pieces of mirror-finished metal plates into the mirror-finish plate, optionally interpose a releasable film between the vinyl chloride resin film 30 and the mirror-finished plate, and then to integrate them by heat pressing or the like in a press machine. It has been carried out.

However, in this method, the smoothness of the mirror plate is directly reflected, and as shown in FIG. 7, the vinyl chloride resin surface 32 of the resulting sheet has a very smooth finish.

Therefore, the grain of the wood, which is originally uneven, is not expressed on the sheet surface, so the sheet product only feels like a plastic sheet, and has almost no material feel like a model. there were. In addition, since this is a method of applying pressure directly using a hard mirror plate, scratches or foreign matter on the mirror plate may cause corresponding damage or damage to the vinyl chloride resin surface 32, which may affect the commercial value of the sheet product. There were cases where it decreased significantly. Therefore, as a method of improving this, conventionally,
As shown in Japanese Patent No. 23748, etc., a soft cushion material such as a Baber cushion or a rubber cushion is placed on an overlay vinyl chloride resin film, and this is pressed as described above (hereinafter abbreviated as method A). ), or a method in which a synthetic resin film that softens and melts during heat pressing is placed on top of the overlay vinyl chloride resin film and is pressed as described above (hereinafter abbreviated as method B) has been adopted. was.

(Problems to be Solved by the Invention) Method A is a method in which the elasticity of the cushioning material is used to push the softened and melted vinyl chloride resin into the recesses on the surface of the roof board during heat pressing. However, since the cushioning material itself does not melt during heat pressing,
The molten vinyl chloride resin could not be sufficiently penetrated into the recesses of the calibration plate, especially the fine and complicated conduit parts, and as a result, as shown in Figure 8, the vinyl chloride resin surface 3 of the resulting sheet product
3 has a surface that has only gentle irregularities and does not correspond accurately to the grain of the school board, and does not give the three-dimensional effect typical of a school board. On the other hand, in method B, the synthetic resin film melts during hot pressing,
This pressure is used to force the molten vinyl chloride resin into the recesses of the roof board. However, when using vinyl chloride resin film, which is considered to be very suitable for synthetic resin films, although the molten vinyl chloride resin can penetrate into the inside of the conduit of the pattern board, the vinyl chloride resin films adhere to each other during heat pressing. , it becomes extremely difficult to separate the two after the pressing process. Therefore, in general, a method is taken in which a releasable film, such as a polyester film with a thickness of 20 mm, which does not adhere to the vinyl chloride resin even during heating, is interposed between the overlay vinyl chloride resin film and the synthetic resin film above it. I've been exposed to it.

However, since releasable films such as polyester films generally do not soften sufficiently during hot pressing, their presence poses an obstacle to ensuring that the molten vinyl chloride resin penetrates sufficiently into the proof plate, especially the conduit. As shown in Figure 8, the resulting sheet product is a sheet with a gently uneven surface that does not correspond exactly to the grain of the board, and fully expresses the elegance and aesthetic effect of the board. There was nothing I could do. The present invention has been made to solve the above-mentioned problems, and
The purpose is to provide a method for manufacturing a vinyl chloride resin-coated wood-grain decorative sheet and board that reliably forms a synchronized uneven surface that accurately corresponds to the grain of the proof board on the upper surface of the sheet or the upper surface of the board. be. Furthermore, the present invention provides a synchronous uneven surface corresponding to the wood grain of a Japanese board. The purpose of the present invention is to provide vinyl chloride resin-coated wood decorative sheets and boards having the following properties.

(Means for Solving the Problems) After intensive research to solve the above problems, the inventors of the present invention have developed a synthetic resin film that softens and melts during heat pressing but does not have adhesive properties with vinyl chloride resin. When the mirror plate is interposed between the vinyl chloride resin film overlaid on the board pasting sheet and the mirror plate is pressed in a press machine as shown below, a synchronous uneven surface corresponding to the grain of the proof plate is formed. The present inventors have discovered that it is possible to reliably produce a resin-coated wood grain decorative sheet without using a release film, and have completed the present invention.

That is, the method for manufacturing a vinyl chloride resin-coated wood grain decorative sheet of the present invention is a method for manufacturing a resin-coated wood grain decorative sheet that forms a symmetrical uneven surface corresponding to the wood grain of the proof board. Apply adhesive to the surface of the proof plate of the sheet pasted with a speed plate, then overlay a soft vinyl chloride resin film on the adhesive surface of the sheet pasted with the proof plate, and further on top of that,
A synthetic resin film that softens and melts during heat pressing but does not adhere to the vinyl chloride resin film is placed, is hot pressed and then cold pressed continuously, and then the synthetic resin film is peeled off. It is something.

Further, the manufacturing method of the present invention can also be applied to the case where a return board is used instead of the calibration board pasted sheet. Therefore, the present invention provides a method for manufacturing a resin-coated wooden decorative board that forms a symmetrical uneven surface that corresponds to the grain of the backing board, in which an adhesive that melts during heat pressing is applied to the surface of the backing board of the backing board. Then, a soft vinyl chloride resin film is layered on the adhesive surface of the gating board, and then on top of that,
A synthetic resin film that softens and melts during hot pressing but does not adhere to the vinyl chloride resin film is placed, is hot pressed and then cold pressed continuously, and then the synthetic resin film is peeled off. The present invention also relates to a method for manufacturing a vinyl chloride resin-coated wooden decorative board.

Further, the present invention is manufactured according to both of the above-mentioned manufacturing methods, and is made by coating a soft vinyl chloride resin film on the surface of a proofboard pasting sheet or board via an adhesive, and which corresponds to the wood grain of the proofboard. The present invention relates to a vinyl chloride resin-coated wood grain decorative sheet and a wood grain decorative board formed with a uniformly uneven surface.

Furthermore, the present invention provides a vinyl chloride resin-coated wooden sheet manufactured by adhering the vinyl chloride resin-coated decorative sheet obtained as a product to a substrate used for a calibration board using an adhesive and pressing it. Also related to hairdressing boards. In the present invention, as a vinyl chloride resin film, for example, 5
A soft vinyl chloride resin film with a thickness of 0 to 250 l is applied.

Further, the synthetic resin film used in the present invention may be any film as long as it softens and melts during hot pressing, but at the same time does not adhere to the vinyl chloride resin; for example, a polyethylene film or an ionomer resin film can be used.

The thickness of this resin film is determined by the depth of the concave portion of the calibration plate used, and generally a film with a thickness of about 301 L to about 1501 L is used. In addition, in the present invention, the adhesive applied to the calibration plate pasting sheet and the calibration plate pasting board must not only have good adhesion to vinyl chloride resin, but also have the property of softening, melting, and sticking at the temperature during hot pressing. For example, thermoplastic adhesives, especially water-soluble melamine resins, styrene-butadiene resins,
Adhesives such as vinyl acetate resin can be applied.
If the adhesive does not soften or melt sufficiently at the heat-pressing temperature, the molten polyethylene, etc. will be able to push the molten vinyl chloride resin deep into the recesses of the pattern surface, creating a faithful relief on the sheet surface. A problem arises in that it is no longer possible to form.

Furthermore, the proof plate pasting sheet used in the present invention is one in which a proof plate is lined with a sheet-like material such as non-woven fabric, and conventionally used sheets can be used. As the adhesive for backing, for example, a styrene-butadiene adhesive or the like is used.

As a pattern board, various precious woods such as cypress, oak, zelkova, cherry tree, etc.
Domestic materials such as elm, black persimmon, Tochigi, yellowfin, shioji, tabunoki, red damask, makore, ash, sen, and Quercus, as well as teak, rosewood, mahogany, herzai maple, saiichi nut, zebrawood, ebony, abodeira, Rosewood, Mangasiro, Tao, Satinwood, Brazilian Rose, Andes Rose, Wonderwood,
Brazilian Core, African Rose, Eurasian Teak, White Tagaya, Hansel Rose, Amazon Rose, Tamakura, Karin, Hersimmon, Royal Pine,
Chinchan rose, Siamese persimmon, Buhi'nga, Oritsu Saiichi Norenat, Kuraro Saiichi Lunat, Iris Rose, Silver Rose, Leo, Indian Heart, etc. are mixed with a certain thickness, for example, 0.15 to 0.60ms. A decorative veneer cut to a certain thickness is used, and the proof plate can be either a so-called thin model or a so-called thick one. The grain of the wood, such as straight-grained, straight-grained, board-grained, or heathered, does not matter.

Furthermore, the calibration board used in the present invention is obtained by pasting the above-mentioned calibration board onto a smooth substrate using the same adhesive as in the case of the kayo board pasting sheet. Available. Substrates used include plywood, especially lauan plywood, and fiberboard, such as hardboard.
, especially medium density U & fiberboard (MDF). and inorganic boards such as calcium silicate board, asbestos slate, asbestos cement perlite board, and gypsum board.

However, when looking microscopically at boards with plywood as the substrate, there are cases where the center core of the plywood is partially missing and forms a cavity, or where the center cores partially overlap. It should be avoided because the surface is not smooth and the press pressure during compaction may not be applied evenly to the entire board surface. In addition, the pressing process, which is important in the present invention, involves placing a laminate of a return board pasting sheet, a calibration board pasting board, a vinyl chloride resin film, and a polyethylene film between two mirror-finished metal plates, using a cold/hot flat press machine. Inside, both films are softened and melted under conditions (for example, 12
This is carried out by hot pressing at 5°C and 8 kg/cm² and successive cold pressing (forced cooling without releasing the pressure).

The conditions for hot pressing are selected as appropriate, taking into account the type and thickness of the material used. In addition, when the vinyl chloride resin-coated decorative wood sheet produced by the method of the present invention is adhered and pressed onto a smooth substrate to produce a decorative wood-grained board, the substrate used for the calibration board, For example, plywood or fiberboard can be used as the substrate. As the adhesive for pasting, water-based vinyl urethane-based or vinyl acetate-based adhesives can be used.

Further, the pressing step may be performed by hot pressing under relatively low temperature and pressure conditions.

(Function) The present invention uses a synthetic resin film that softens and melts during heat pressing, but does not have adhesive properties with the vinyl chloride resin film at the same time, as a buffer film overlaid on the overlay vinyl chloride resin film. During hot pressing, the pressure of the molten synthetic resin allows the molten vinyl chloride resin to penetrate deep into the recesses (particularly deep into the conduit part) on the surface of the roof board of the roof board pasting sheet (or calibration board pasting board). , and the synthetic resin film can be easily peeled off after the pressing process. Therefore, it is possible to reliably form on the vinyl chloride resin surface of the resulting sheet product (board product) a synchronized uneven surface that corresponds precisely to the grain of the proof plate. In addition, the presence of a synthetic resin film can alleviate the effects of scratches and foreign matter on the metal mirror plate. (Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

Example 1 As shown in FIG. 1, the vinyl chloride resin-coated wood decorative sheet 1 of this example is made of a case in which a return plate (Mizunara) 2 of 0.25 ml and 1 thickness is lined with a non-woven fabric 9 using an adhesive 10. A soft vinyl chloride resin film 5 with a thickness of 0.15 mm is laminated and pressed onto the board pasting sheet 3 using an adhesive 4, and the top surface of the sheet has a matching uneven surface 8 corresponding to the grain of the wood surface 7
It has.

The method for manufacturing this wood grain decorative sheet 1 is as follows. First, water-soluble styrene-butadiene thermosetting adhesive 10
was applied onto a non-woven fabric 9 with a basis weight of 2 Qg/s2, and a casing plate 2 was attached thereon, and this was heated at 105'C x 120 seconds x
Calibration plate pasted sheet 3 was obtained by heat-pressing under the conditions of 7 kg/cm2. Next, after polishing the surface 7 of the proof plate pasting sheet 3, a solvent-based polyurethane adhesive 4 is applied to the proof plate surface 7.
This was then allowed to air dry.

Then, as shown in FIG. 2, a soft vinyl chloride resin film 5 is placed on top of the proof plate pasting sheet 3 coated with adhesive 4, and then 0.10mm thick low-density polyethylene A synthetic resin film 6, which is a film, is placed, placed between two metal mirror plates 20, 20, heat-pressed between 8 discs 2l, 2l in a hot/cold flat press machine, and then continuously pressed. It was cold pressed. Heat compression: 125℃ x lO minutes x
The cold compaction was carried out under the conditions of 8 kg/cm2, and the cold compaction was carried out under the conditions of 10 min x 8 kg/C2. The pressurized state was maintained at all times during the pressing process. However, during hot pressing, air may be vented several times to release residual solvent, moisture, etc. By this pressing process, both resin films 5 and 6 were melted, and a product as shown in FIG. 3 was obtained.

After that, the product shown in Figure 3 was taken out of the press machine, and
The synthetic resin film 6 on the side is replaced with the vinyl chloride resin film 5.
When it was peeled off further, a vinyl chloride resin-coated wood grain decorative sheet 1 was obtained, which had a symmetrical uneven surface 8 that looked like it had been embossed and which corresponded precisely to the wood grain of the pattern board.

Example 2 As shown in FIG. 4, the vinyl chloride resin-coated wood grain decorative board 11 of this example has a calibration plate pasted board 12 applied in place of the calibration plate pasted sheet 3 of Example I. be. In other words, a 0.25m thick proof board (Mongolian oak) 2 is glued with adhesive l.
4. Mock-up board l attached to medium-density fiberboard 13 by 4.
2, a 0.15 mm thick soft vinyl chloride resin film 5 is laminated and pressed with an adhesive 4, and the upper surface of the sheet has a matching uneven surface 8 corresponding to the grain of the calibration plate surface 7. .

This wood grain decorative board 11 was manufactured using the same procedure and conditions as in Example 1. That is, first, a water-soluble styrene-butadiene thermosetting adhesive 14 is applied onto a medium density TA fiber board 13, and a calibration plate 2 is pasted thereon.
By heat-pressing under the conditions of S°Cx 120 seconds x 7 kg/cm', a board 12 was obtained.

Next, after polishing the pattern surface 7 of the pattern board l2,
A solvent-type polyurethane adhesive 4 was applied to the surface 7 of the calibration plate, and then air-dried.

Then, as shown in FIG. 5, a soft vinyl chloride resin film 5 is layered on the calibration board l2 coated with the adhesive 4, and then a 0.10 mm thick low-density polyethylene film is placed on top of the flexible vinyl chloride resin film 5. Place the resin film 6 on it, put it into a hot/cold flat press machine, place the metal mirror plate 20 between the resin film 6 and the hot platen 2l, heat press it, and then cold press it continuously. Did. Hot pressing was carried out under the conditions of 125°C x 15 minutes x Elkg/cm2, and cold pressing was carried out under the conditions of 15 minutes x 8kg/cm2, with a slightly longer pressing time. During the pressing process, the pressurized state was maintained at all times. However, air was vented several times as necessary during hot pressing.

Through this pressing process, both the resin films 5 and 6 are melted to obtain a product as shown in FIG. When it was peeled off, a vinyl chloride resin-coated wooden grain decorative board 11 was obtained, which had a embossed-like textured surface 8 formed thereon that corresponded precisely to the grain of the backing plate.

(Effects of the Invention) As explained above, the vinyl chloride resin-coated wood-grain decorative sheet and the method for manufacturing the same wood-grain decorative board of the present invention provide a synchronous uneven surface that accurately corresponds to the wood grain of the proof plate on the top surface of the sheet or It can be formed on the top surface of the board reliably and with good workability, and the synthetic resin film can also act as a cushioning material to reduce the adverse effects of scratches on the mirror board and foreign matter mixed in.

In addition, the vinyl chloride resin-coated wood grain decorative sheet and wood grain decorative board of the present invention have a synchronized uneven surface that accurately corresponds to the grain of the board, and the natural three-dimensional effect of the surface of the pattern board is faithfully reproduced. It does not impair the warmth and depth of the material, which is unique to wood, and has a very good aesthetic effect, significantly increasing its commercial value.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a vinyl chloride resin-coated decorative wood sheet according to Example 1 of the present invention. FIG. Figure 3 is a sectional view showing a vinyl chloride resin-coated wood grain decorative sheet in the process of being manufactured by the manufacturing method of the present invention, Figure 4 is a vinyl chloride resin-coated sheet of Example 2 of the present invention. 5 is a cross-sectional view showing a decorative wood grain board, FIG. 5 is a diagram showing the stacked arrangement of each member in a hot/cold press machine when manufacturing the decorative wood board shown in FIG. 4 according to the present invention, and FIG. 6 is a diagram showing the present invention. FIGS. 7 and 8 are cross-sectional views showing a vinyl chloride resin-coated wood decorative board that is in the process of being manufactured by the manufacturing method, and FIGS. 7 and 8 are cross-sectional views showing vinyl chloride resin-coated decorative wood sheets manufactured by the conventional manufacturing method. In the figure, vinyl chloride resin coated wood grain decorative sheet school board school board pasting sheet adhesive soft vinyl chloride resin film synthetic resin film school board surface synchronized uneven surface 1l... vinyl chloride resin coated wood grain decorative board 12...
・Schoolboard Paste Board Figure 2 (and 2 others) Flute 3 Figure 5 Figure 6 Figure 8 Figure 8 1 bottle 1 Hivinyl resin base 1 wood decorative sheet 21 wedge plate 3 talented friends. 1 fortune receipt 4/adhesion 5...soft page 1 vinyl citrus film 4 frame 6.・・Imaisui resin film 7・Ship plate surface 8・・Synchronized concavity. l! ll! ll Surface 11...Mounded vinyl resin coated crystallized oxide 12...
・Merchandise water code

Claims (6)

[Claims] (1) ■In a method for manufacturing a resin-coated wood grain decorative sheet that forms a symmetrical uneven surface that corresponds to the wood grain of the board, an adhesive that melts during heat pressing is applied to the ■board surface of the board-attached sheet, Next, a soft vinyl chloride resin film is placed on top of the adhesive surface of the board-attached sheet, and on top of that is placed a synthetic resin film that softens and melts during heat pressing but does not adhere to the vinyl chloride resin film. 1. A method for producing a vinyl chloride resin-coated wood decorative sheet, which comprises hot pressing and successive cold pressing, and then peeling off the synthetic resin film. (2) ■In a method for manufacturing a resin-coated wood grain decorative board that forms a symmetrical uneven surface that corresponds to the wood grain of the board, an adhesive that melts during heat pressing is applied to the ■board surface of the board-bound board; Next, a soft vinyl chloride resin film is placed on top of the adhesive surface of the above board, and on top of that is placed a synthetic resin film that softens and melts during heat pressing but does not adhere to the vinyl chloride resin film. 1. A method for producing a vinyl chloride resin-coated wooden decorative board, which comprises hot pressing and successive cold pressing, and then peeling off the synthetic resin film. (3) The manufacturing method according to claim 1 or 2, characterized in that a polyethylene film or an ionomer resin film is used as the synthetic resin film. (4) Manufactured according to the method according to claim 1, wherein a soft vinyl chloride resin film (1) is coated on the surface of a board-attached sheet via an adhesive, and (3) a synchronous uneven surface corresponding to the wood grain of the board is formed. A wood grain decorative sheet coated with vinyl chloride resin. (5) Manufactured according to the method according to claim 2, wherein a soft vinyl chloride resin film (1) is coated on the surface of a board pasted board via an adhesive, and (3) a synchronous uneven surface corresponding to the grain of the board is formed. A wood grain decorative board coated with vinyl chloride resin. (6) A vinyl chloride resin, characterized in that it is produced by adhering the vinyl chloride resin-coated wood grain decorative sheet according to claim 4 to a substrate used for a board with an adhesive and pressing it. Covered wooden decorative board.