JPS60224501A - 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 [Technical Field] The present invention relates to a method for manufacturing decorative veneers mixed with additives.

[Background technology]

In the conventional manufacturing method for decorative veneers, rotary or sliced veneers of a certain thickness are bleached or dyed and dried, and then a plurality of veneers are glued into a predetermined mold. They were laminated and pressure-glued to create a laminated flitch, which was then sliced to obtain decorative veneers.

The decorative veneer manufactured in this way has a wood grain pattern that resembles natural wood on its surface, making it suitable for wall materials.

It is widely used as a surface material for interior items such as ceiling materials.

However, in order to improve the properties of such decorative veneers, it has been considered to incorporate various additives such as fragrances and fungicides, but it is difficult to uniformly diffuse the additives within the veneer. It was difficult and the retention of the additive was poor.

For example, when adding a fragrance that emits the scent of a natural resin, there is a problem that the fragrance is highly volatile because it is water-soluble or alcohol-based, and the fragrance evaporates during the manufacturing process.

[Purpose of the invention]

An object of the present invention is to provide a method for manufacturing a decorative veneer that can sustainably retain additives such as fragrances and fungicides for a long period of time.

[Disclosure of the invention]

The method for manufacturing decorative veneers of the present invention is to apply a mixture of a fluid liquid resin, a curable liquid resin, and an additive to a material veneer, wash it off, or impregnate it, steam it, dry it, and then bond a plurality of veneers with an adhesive. This method is characterized in that an assembled flitch is created by laminating and adhering the flitch through the flitch, and then this flitch is sliced.

The fluid liquid resin is polyethylene glycol (
Polyethylene glycol methacrylate (hereinafter abbreviated as PEGMA) can be used as the cold hardening liquid resin. These have conventionally been used to improve the performance of wood, such as its dimensional stability and crack resistance. In this invention, such PEG and PEGMA are mixed, and additives such as fragrances and fungicides are added thereto. The obtained mixture is used for material veneer (dyed veneer, bleached veneer, sliced veneer, etc.) K
Impregnated or applied with a spray or roll coater and treated with steam. At that time, PEGMA is used alone or with the addition of a curing agent.

When using a fragrance as an additive, the PEG and PEGM
The blending ratio of A can be determined as appropriate, but PEGM
The higher the ratio of A, the higher the persistence of the fragrance.

However, when the PEGMA content is higher than 90% for dogs, the scent emission is extremely reduced. Usually 30-60% PEG.

PEGMA of about 70 to 40% is good. Steaming increases the temperature of the veneer, allowing the liquid applied or impregnated under high humidity to diffuse into the veneer and penetrate deeper into the veneer, and also to reduce the effect of PEGMA curing within the veneer. give. Steaming temperature is usually 80-110℃
The position is good.

It is preferable to use a fragrance that has good compatibility with PEG or PEGMA, and an alcohol-based fragrance is preferable in terms of uniform diffusion. The veneer treated in this manner has the three components PEG, PEGMA, and fragrance mixed inside the veneer, but since PEG does not harden, it can microscopically flow within the veneer. On the other hand, since PEGMA is microscopically hardened inside the nest plate by a hardening agent or heat, it has no fluidity, and the added fragrance is retained by this PEGMA K. In other words, the fluidity of PEG and the retention power of PEGMA interact to exert long-term and sustained pressure on fragrance release. This means that the above PEGMA blending ratio is 90%.
This is easily understood from the fact that the larger the size, the stronger the fragrance retention ability and the lower the fragrance release, while the higher the PEG ratio, the higher the fragrance emission and the lower the persistence.

On the other hand, when using a fungicide as an additive, the fungicide is similarly mixed with PEG and PEGMA, applied to or impregnated on the nesting board, and then steamed. In this case, mold growth is generally affected by temperature, humidity, and the moisture content of the veneer, but the moisture content of the veneer has a particularly large effect, and even within a single veneer, there are areas with high moisture content and areas with low moisture content. 5) If there is a mixture of 5) and 5) areas, mold will occur more frequently in areas with high moisture content. Therefore, in order to prevent the growth of mold, it is important to treat the veneer so that the high moisture content area contains a large amount of the fungicide. For this reason, PEG.

The mixed solution of PEGMA and fungicide preferably has fluidity that allows it to flow as moisture moves within the veneer,
Normally, the blending ratio is 50% or more of PEG and 50% or less of PEGMA.0 However, if the moisture content distribution within the veneer is not a problem, the above ratio can be changed as appropriate.The fungicide used is PEG. It is preferable to use a material having excellent compatibility with PEGMA in order to obtain a high antifungal effect. The veneer treated in this manner has three components, PEG, PEGMA, and a fungicide, entrapped inside the veneer. Since PEG does not harden, it microscopically moves (flows) along with the moisture in the veneer, and if a moisture content distribution occurs in a single veneer, it will flow more and concentrate in areas with higher moisture content. Along with this, the fungicide will also be concentrated in areas with high moisture distribution. This means that the moisture content (6
) Provides an extremely effective preventive effect against areas where mold is likely to grow.

Furthermore, PEGMA is cured within the veneer and is in a so-called fixed state (microscopically). At this time, the fungicide that came with it also remains fixed. This is a trap, PE
The two components, G and PEGMA, interact to make the fungicide more sustainable and effective.

After being treated with fragrances or fungicides in this way, as shown in Figure 1 (
G) ~ Q)) K As shown, a plurality of treated material veneers 1 are laminated in a concave-convex mold 2 via an adhesive, and bonded by pressure to obtain an assembled flitch 3, and this flitch is inserted from a predetermined direction. The decorative veneer 4 having a desired wood grain pattern is obtained by slicing.

Furthermore, by using PEG and PEGMA,
It is also possible to improve the dimensional stability and crack resistance, which are their original functions.

Example [Fragrance-mixed decorative veneer] Example 1: A mixed solution of PEG/PEGMA/fragrance (hinoki diol) = 30/6515 is applied to a dyed nest board (material veneer) using a roll coater in the decorative veneer manufacturing process. 200~250y/rr? It was applied and steamed at 80°C for 1 hour. After drying, it was made into a laminated flitch and sliced to obtain a laminated decorative veneer.

Example 2: Decolorized veneer (material veneer) K PEG/PEG
MA ten curing agent/fragrance (geraniol) = 55/38/7
300~400y/fr with a roll coater? Apply, 1
Steaming treatment was performed at 00°C for 2 hours. This was made into a laminated flitch and sliced to obtain a laminated decorative veneer.

Example 3: A dyed veneer was coated with PEG/PEGMA curing agent/fragrance (heliotrobin) = 8/90/2 using a roll coater at a rate of 100 to 2009/rr? It was applied and steamed at 100°C for 8 hours. This was made into a laminated flitch and sliced to obtain a laminated decorative veneer.

Example 4: Decolorized veneer [PEG/PEGMA/
Fragrance (geraniol) = 80/18/2 from 200 to 30
0y/- was applied and steamed at 80°C for 2 hours. This was made into a laminated flitch and sliced to obtain a laminated decorative nest board.

After applying each of the decorative veneers obtained in Examples 1 to 4 to plywood as a wall material, a scent test was conducted. In the test, 10 people evaluated the scent after 300 days. The results are shown in Table 1.

The evaluation results were classified and displayed in the following four stages.

A: I feel a strong scent B: I feel a scent C: I hardly feel a scent D: I don't feel a scent at all It can be seen that this lasts for a long period of time.

[Decorative veneer mixed with fungicide]

Example 5: PEG/PEGMA/on dyed veneer
Antifungal agent (benzimidazole compound) = 50/43
/7 mixed solution with a roll coater to 150-200? /r
d coating and steaming treatment at 90°C for 1.5 hours. After drying, it was made into a laminated flitch and sliced to obtain a laminated decorative veneer.

Example 6: Decolorized veneer KPEG/PEGMA
/ fungicide (organic iodine compound) = 71/25/4 mixed solution with a roll coater at 200-300y/rr? It was applied and steamed at 100°C for 2 hours.

This was made into a laminated flitch and sliced to obtain a laminated decorative veneer.

Example 7: PEG/PEGMA on sliced veneer
/ Antifungal agent (organic chlorine compound) - Spray a mixed solution of 88/715 at 250 to 300 y/rr? Apply,
Steaming treatment was performed at 95° C. for 1 hour. This was made into a laminated flitch and sliced to obtain a laminated decorative veneer (10). Example 8: Dyed veneer was coated with PEG/PEGMA/
A mixed solution of fungicidal agent (organic nitrogen sulfur compound) = 30/60/10 was applied with a roll coater at 100 to 200 y/n? It was applied and steamed at 100°C for 1 hour.

This was made into a laminated flitch and sliced to obtain a laminated decorative veneer.

The decorative veneers obtained in Examples 1 to 4 were inoculated with several types of fungi,
When we conducted a mold growth acceleration test, we found that the untreated mold developed mold in one week, whereas Examples 1 to 4 developed mold in one week.
The number of days each of these occurred is shown in Table 2.

Note that the number of days elapsed in the table is the number of days in which mold appeared on 115 or more of the test piece area.

This result shows that the method of the present invention has an excellent antifungal effect on decorative veneers.

Note that when a fragrance and a fungicide are used together, the effects of each can be achieved at the same time. I cut it, PEG
Of course, other fluid liquid resins or curable liquid resins may be used in place of PEGMA.

These liquid resins are preferably water-soluble so that they can penetrate well into the veneer.

〔Effect of the invention〕

According to the present invention, the effect of mixing additives into the material veneer can be sustained over a long period of time, and a decorative veneer with a high-class feel can be obtained.

[Brief explanation of drawings]

FIG. 1 is a process explanatory diagram showing an example of the manufacturing method of the present invention. 1...Material veneer, 3...Laminated fritsch, 4...Decorative veneer (A) Figure 1 (8) (C)

Claims (4)

[Claims] (1) Coating or impregnating a mixture of fluid liquid resin, hardening liquid resin, and additives on a material veneer, steaming it, drying it, and then laminating and bonding multiple sheets with an adhesive to form an assembled flitch. A method for producing a decorative veneer, which comprises creating and slicing this flitch. (2) The method for manufacturing a decorative veneer according to claim (1), wherein the fluid liquid resin is polyethylene glycol and the curable liquid resin is polyethylene glycol methacrylate. (3) Claim No. 1, wherein the additive is a fragrance.
) Manufacturing method of decorative veneer described in section 0 (4) Claim No. 2, wherein the additive is a fungicide (
1) The method for producing a decorative veneer as described in section 1).