JPH11240002A - Manufacture of wooden material - Google Patents
Manufacture of wooden materialInfo
- Publication number
- JPH11240002A JPH11240002A JP4216698A JP4216698A JPH11240002A JP H11240002 A JPH11240002 A JP H11240002A JP 4216698 A JP4216698 A JP 4216698A JP 4216698 A JP4216698 A JP 4216698A JP H11240002 A JPH11240002 A JP H11240002A
- Authority
- JP
- Japan
- Prior art keywords
- sulfite
- urea
- formaldehyde
- scavenger
- adhesive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は合板、パーティクル
ボード等の木質材料の製造に関する。さらに詳しくは、
木質材料の接着剤に起因するホルムアルデヒドの放散を
防止するホルムアルデヒド捕捉剤に関するものである。The present invention relates to the manufacture of woody materials such as plywood, particleboard and the like. For more information,
The present invention relates to a formaldehyde scavenger that prevents the emission of formaldehyde caused by an adhesive for wood materials.
【０００２】[0002]
【従来の技術】合板、パーティクルボード、木質繊維板
などの木質材料の製造には尿素−ホルムアルデヒド樹
脂、メラミン−ホルムアルデヒド樹脂、フェノール−ホ
ルムアルデヒド樹脂あるいはこれらの共縮合樹脂、いわ
ゆるホルムアルデヒド系樹脂などが接着剤として使用さ
れる。しかしながら、このような木質材料からは使用し
ているホルムアルデヒド系樹脂に起因して少量ではある
が遊離したホルムアルデヒドが大気中に放出され、生活
環境を悪化させ健康に害を与える原因として問題視され
ている。この問題の解決方法として従来から尿素および
メラミンに対するホルムアルデヒドの含有率を下げた低
モル比のホルムアルデヒド樹脂接着剤を使用する方法、
またホルムアルデヒドと反応してこれを捕捉するいわゆ
るホルムアルデヒド捕捉剤を木質材料に塗布する方法等
の手段が行われている。2. Description of the Prior Art Urea-formaldehyde resin, melamine-formaldehyde resin, phenol-formaldehyde resin or a co-condensation resin thereof, so-called formaldehyde resin, etc. is used as an adhesive for the production of wood materials such as plywood, particle board and wood fiber board. Used as However, from such woody materials, a small amount of formaldehyde released due to the formaldehyde resin used is released into the atmosphere, which is regarded as a problem as a cause of deteriorating the living environment and harming health. I have. As a method of solving this problem, a method using a formaldehyde resin adhesive having a low molar ratio with a reduced formaldehyde content relative to urea and melamine,
Means such as a method of applying a so-called formaldehyde scavenger, which reacts with formaldehyde to trap the formaldehyde, on a wooden material has been used.
【０００３】[0003]
【発明が解決しようとする課題】しかし、上記のホルム
アルデヒドの含有率を下げた低モル比のホルムアルデヒ
ド樹脂接着剤は貯蔵安定性が悪く、また合板製造時の仮
接着性も悪い。さらには製造した合板の接着強度が低下
する等の問題がある。したがって通常はホルムアルデヒ
ド樹脂接着剤による木質材料にホルムアルデヒド捕捉剤
として尿素を塗布する方法が行なわれるが、しかし尿素
には金属等を腐食発錆させるといった問題がある。However, the formaldehyde resin adhesive having a low molar ratio in which the formaldehyde content is reduced has poor storage stability, and also has poor temporary adhesion during plywood production. Furthermore, there is a problem that the adhesive strength of the manufactured plywood is reduced. Therefore, a method of applying urea as a formaldehyde scavenger to a wood material using a formaldehyde resin adhesive is usually performed. However, urea has a problem of corroding and rusting metals and the like.
【０００４】[0004]
【課題を解決するための手段】本発明者らは上記問題点
について鋭意検討を行った結果本発明を完成した。すな
わち、本発明の木質材料の製造方法は、ホルムアルデヒ
ド系樹脂接着剤を使用して合板、パーティクルボード等
の木質材料を製造するに際し、木質材料に尿素および亜
硫酸塩を尿素／亜硫酸塩の比が固形分重量比で９／１〜
２／８で塗布することを特徴とするものである。Means for Solving the Problems The present inventors have made intensive studies on the above problems and as a result have completed the present invention. That is, in the method for producing a wood material of the present invention, when a wood material such as plywood or particle board is produced using a formaldehyde resin adhesive, urea and sulfite are added to the wood material at a urea / sulfite ratio of solid. 9/1 ~ by weight ratio
It is characterized by being applied in 2/8.
【０００５】[0005]
【発明の実施の形態】本発明において対象とする接着剤
は尿素−ホルムアルデヒド樹脂、メラミン−ホルムアル
デヒド樹脂、フェノール−ホルムアルデヒド樹脂あるい
はこれらの共縮合樹脂、いわゆるホルムアルデヒド系樹
脂接着剤である。また本発明において使用する尿素およ
び亜硫酸塩はそれぞれがホルムアルデヒドの捕０剤とし
て知られているものであるが、本願発明においてはこの
二つを組み合わせて使用することにより、優れたホルム
アルデヒドの捕捉性を保ちながら、金属腐食を防止する
ことが出来るところに特徴がある。すなわち、尿素／亜
硫酸塩の比を重量比で９／１〜２／８の範囲で混合使用
する。９／１より亜硫酸塩が少ないと金属腐食性が大き
くなり、２／８より尿素が少ないと十分なホルムアルデ
ヒド捕捉効果を得ることが出来ない。また、亜硫酸塩と
しては通常亜硫酸ナトリウム、または亜硫酸カリウムが
好適に使用出来る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The adhesive to be used in the present invention is a urea-formaldehyde resin, a melamine-formaldehyde resin, a phenol-formaldehyde resin or a co-condensation resin thereof, a so-called formaldehyde resin adhesive. The urea and sulfite used in the present invention are each known as a formaldehyde scavenger. In the present invention, by using these two in combination, excellent formaldehyde scavenging properties can be obtained. The feature is that metal corrosion can be prevented while maintaining. That is, urea / sulfite is mixed and used in a weight ratio of 9/1 to 2/8. If the amount of sulfite is less than 9/1, the metal corrosiveness becomes large, and if the amount of urea is less than 2/8, a sufficient formaldehyde trapping effect cannot be obtained. As the sulfite, usually, sodium sulfite or potassium sulfite can be suitably used.
【０００６】本願発明のホルムアルデヒド捕捉剤は水溶
液として塗布するが、通常その濃度は５〜３０重量％、
好ましくは１０〜２０重量％である。濃度が薄すぎる
と、十分なホルムアルデヒド捕捉効果を得るためには多
量の捕捉液を塗布することになるため、これは木質材料
あるいは単板、チップ等に多量の水分を塗布することに
なり製品の外観を損ない、接着工程等に悪影響を及ぼす
おそれがある。また、濃度が濃すぎると捕捉剤水溶液の
塗布量が少なくなりすぎ、被塗布材料への均一な塗布が
困難となる。The formaldehyde scavenger of the present invention is applied as an aqueous solution, and its concentration is usually 5 to 30% by weight.
Preferably it is 10 to 20% by weight. If the concentration is too low, a large amount of trapping liquid will be applied in order to obtain a sufficient formaldehyde trapping effect.This means that a large amount of water will be applied to wood materials, veneers, chips, etc. The appearance may be impaired and the bonding process may be adversely affected. On the other hand, if the concentration is too high, the applied amount of the aqueous solution of the scavenger will be too small, and it will be difficult to apply uniformly to the material to be applied.
【０００７】本発明のホルムアルデヒド捕捉剤水溶液の
塗布時期はホルムアルデヒド系接着剤で接着する接着工
程の前後の任意の時期でよく、接着工程前の単板、木質
繊維やチップ等の素材に塗布する方法、あるいは、接着
工程後の木質材料の表面に塗布する方法のいずれでもよ
い。また塗布手段はスプレー塗布、ロール塗布など種々
の手段を選ぶことが出来る。塗布量は単板やチップの材
質、接着剤の種類、使用量などによって異なるが、一般
的な木質材の場合においては、固形分として０．１〜２
ｇ／尺2 （１．１〜２１．８ｇ／ｍ2 ）の塗布で十分な
効果を得ることが出来る。[0007] The aqueous formaldehyde scavenger aqueous solution of the present invention may be applied at any time before and after the bonding step of bonding with a formaldehyde-based adhesive, and is applied to a material such as veneer, wood fiber or chip before the bonding step. Alternatively, any method of applying to the surface of the woody material after the bonding step may be used. As the application means, various means such as spray application and roll application can be selected. The amount of coating varies depending on the material of the veneer or chip, the type of adhesive, the amount used, etc., but in the case of a general wood material, the solid content is 0.1 to 2%.
g / scale 2 (1.1 to 21.8 g / m 2 ) can provide a sufficient effect.
【０００８】[0008]
【実施例】以下、実施例により本発明をさらに具体的に
説明する。The present invention will be described more specifically with reference to the following examples.
【０００９】実施例１ 尿素−ホルムアルデヒド樹脂、メラミン−ホルムアルデ
ヒド樹脂、メラミン−尿素−ホルムアルデヒド樹脂、変
性フェノール−ホルムアルデヒド樹脂の各接着剤を用い
それぞれの合板を製造した（未処理合板）。また、さら
に同様に製造した合板に尿素−亜硫酸ナトリウム混合水
溶液（尿素濃度＝１０重量％、亜硫酸ナトリウム濃度＝
１０重量％）をスプレーにて塗布量が５ｇ／尺2 （５
４．５ｇ／ｍ2 ）となるよう均一に吹きつけた（処理合
板）。製造後２日目に、得られた合板からの放散ホルム
アルデヒド量をＪＡＳデシケータ法で測定した結果を表
１に示す。また、用いた尿素−亜硫酸ナトリウム水溶液
に鉄釘を３０日浸しておいたが、錆はみられなかった。Example 1 Each plywood was manufactured using each adhesive of urea-formaldehyde resin, melamine-formaldehyde resin, melamine-urea-formaldehyde resin, and modified phenol-formaldehyde resin (untreated plywood). Further, a urea-sodium sulfite mixed aqueous solution (urea concentration = 10% by weight, sodium sulfite concentration =
The coating amount of 10 wt%) with a spray is 5 g / scale 2 (5
4.5 g / m 2 ) (the treated plywood). On day 2 after the production, the amount of formaldehyde released from the obtained plywood was measured by the JAS desiccator method, and the results are shown in Table 1. The iron nail was soaked in the used aqueous urea-sodium sulfite solution for 30 days, but no rust was observed.
【００１０】[0010]
【表１】 [Table 1]
【００１１】実施例２ 単板に予め尿素−亜硫酸ナトリウム水溶液（尿素５重量
％、亜硫酸ナトリウム１０重量％）を塗布量２ｇ／尺2
（２１．８ｇ／ｍ2 ）となるようにスプレーで塗布し乾
燥した。この単板を使用し、実施例１と同様にしてホル
ムアルデヒド系樹脂接着剤を用いて合板を製造し、２日
後の放散ホルムアルデヒド量を測定した結果を表２に示
す。また、用いた尿素−亜硫酸カリウム水溶液に鉄釘を
３０日浸しておいたが、錆は見られなかった。Example 2 A urea-sodium sulfite aqueous solution (urea 5% by weight, sodium sulfite 10% by weight) was applied to a veneer in advance at a coating amount of 2 g / scale 2
(21.8 g / m 2 ) and dried by spraying. Using this veneer, a plywood was manufactured using a formaldehyde-based resin adhesive in the same manner as in Example 1, and the amount of diffused formaldehyde after 2 days was measured. Table 2 shows the results. The iron nail was immersed in the used aqueous urea-potassium sulfite solution for 30 days, but no rust was observed.
【００１２】[0012]
【表２】 [Table 2]
【００１３】比較例１ １０重量％尿素水溶液に鉄釘を浸しておいたところ、４
日後には錆が発生していた。Comparative Example 1 An iron nail was immersed in a 10% by weight aqueous urea solution.
After a day, rust had occurred.
【００１４】[0014]
【発明の効果】本発明の方法によれば、ホルムアルデヒ
ド捕捉剤に起因する金属例えば釘等の腐食を起こすこと
なく、ホルムアルデヒド系樹脂接着剤による木質材から
のホルムアルデヒド放散を低下させることができる。According to the method of the present invention, the formaldehyde resin adhesive can reduce the emission of formaldehyde from wood materials without causing corrosion of metals such as nails caused by the formaldehyde scavenger.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 貝ケ石 博元 大阪府高石市高砂１丁目６番地 三井化学 株式会社内 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Hiromoto Kaigaishi 1-6-6 Takasago, Takaishi-shi, Osaka Mitsui Chemicals, Inc.
Claims (2)
合板、パーティクルボード等の木質材料を製造するに際
し、木質材料に尿素および亜硫酸塩を尿素／亜硫酸塩の
比が固形分重量比で９／１〜２／８で塗布することを特
徴とする木質材料の製造方法。When producing a wood material such as plywood or particle board using a formaldehyde resin adhesive, urea and sulfite are added to the wood material at a urea / sulfite ratio of 9/1 in terms of solids weight ratio. A method for producing a woody material, wherein the method is applied at ２ to ／.
ウムである請求項１記載の木質材料の製造方法。2. The method according to claim 1, wherein the sulfite is sodium sulfite or potassium sulfite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4216698A JPH11240002A (en) | 1998-02-24 | 1998-02-24 | Manufacture of wooden material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4216698A JPH11240002A (en) | 1998-02-24 | 1998-02-24 | Manufacture of wooden material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11240002A true JPH11240002A (en) | 1999-09-07 |
Family
ID=12628392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4216698A Pending JPH11240002A (en) | 1998-02-24 | 1998-02-24 | Manufacture of wooden material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11240002A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007004507A1 (en) | 2005-07-06 | 2007-01-11 | Ipposha Oil Industries Co., Ltd. | Aldehyde capture material and process for production of plywood with the same |
| JP2008162237A (en) * | 2007-01-05 | 2008-07-17 | Ipposha Oil Ind Co Ltd | Method for producing wood board |
| CN114701033A (en) * | 2022-03-04 | 2022-07-05 | 哈尔滨工业大学（深圳） | Preparation method and application of surface carbonized delignified wood |
-
1998
- 1998-02-24 JP JP4216698A patent/JPH11240002A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007004507A1 (en) | 2005-07-06 | 2007-01-11 | Ipposha Oil Industries Co., Ltd. | Aldehyde capture material and process for production of plywood with the same |
| JP2008162237A (en) * | 2007-01-05 | 2008-07-17 | Ipposha Oil Ind Co Ltd | Method for producing wood board |
| CN114701033A (en) * | 2022-03-04 | 2022-07-05 | 哈尔滨工业大学（深圳） | Preparation method and application of surface carbonized delignified wood |
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