JPS60250906A - Method of decoloring wood - Google Patents
Method of decoloring woodInfo
- Publication number
- JPS60250906A JPS60250906A JP10789484A JP10789484A JPS60250906A JP S60250906 A JPS60250906 A JP S60250906A JP 10789484 A JP10789484 A JP 10789484A JP 10789484 A JP10789484 A JP 10789484A JP S60250906 A JPS60250906 A JP S60250906A
- Authority
- JP
- Japan
- Prior art keywords
- decolorizing
- wood
- solution
- veneer
- weight
- 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
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】 〔技術分野〕 この発明は、木材の脱色法に関する。[Detailed description of the invention] 〔Technical field〕 This invention relates to a method for decolorizing wood.
人工化粧単板の製造にあたり、素材単板の脱色を、単板
に脱色液を塗布して行うことが、この出願人により開発
された。これは、例えば、素材単板にＮａＯ肥 ＫＯＨ
，、Ｌ ｉＯＨ等の強アルカリ水溶液を塗布し、養生（
放置の他、スチーム雰囲気にさらすなどする）し、３５
〜６０重量％の過酸化水素（以下、Ｈ２Ｏ２と記す）水
溶液を塗布し、再び養生（前記と同様）するようにして
行われる。この方法は、脱色液の使用量が少なくて済み
、廃液処理も簡単である、などの利点を有する。アルカ
リは、Ｈ２Ｏ２の活性化のために使用される。In the production of artificially decorated veneers, the applicant has developed a method for decolorizing the material veneer by applying a decolorizing liquid to the veneer. This can be done, for example, by applying NaO fertilizer KOH to the material veneer.
,, Apply a strong alkaline aqueous solution such as LiOH and cure (
(In addition to leaving it unattended, exposing it to a steam atmosphere, etc.)
~60% by weight hydrogen peroxide (hereinafter referred to as H2O2) aqueous solution is applied and cured again (same as above). This method has the advantage that only a small amount of decolorizing solution is required and waste solution treatment is simple. Alkali is used for activation of H2O2.
しかしながら、強アルカリ溶液を用いるため、単板にア
ルカリ焼けが生じ、脱色単板の黄味を取り除くことが困
難である。このようなことから、脱色に際しては、高濃
度（３５〜６０重量％）のＨ２０２溶液を使用して脱色
処理を行う必要があった。However, since a strong alkaline solution is used, alkali burn occurs on the veneer, making it difficult to remove the yellow tinge from the bleached veneer. For this reason, it was necessary to perform decolorization using a highly concentrated (35 to 60% by weight) H202 solution.
そこで、この発明は、単板にアルカリ焼けが起きにクク
、低濃度のＨ２Ｏ２を使用しても脱色処理を行うことが
できる木材の脱色法を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a method for decolorizing wood, which can be used to decolorize wood even when low concentration H2O2 is used without causing alkali burn on the veneer.
上記目的を達成する々差？この発明は、木材に脱色剤を
塗布することによって脱色を行うに当たり、脱色剤とし
てＨ２Ｏ２を用いることとし、活性剤として遷移金属イ
オンおよび／または弱アルカリを用いることを特徴とす
る木材の脱色法を要旨とする。Is there a difference in achieving the above objectives? The present invention provides a method for decolorizing wood, which is characterized in that H2O2 is used as the decolorizing agent and transition metal ions and/or weak alkali are used as the activator. This is the summary.
以下にこれを詳しく説明する。This will be explained in detail below.
脱色処理の順序は、従来と同様であるが、この発明の方
法においては、活性化にあたり、強アルカリ溶液を用い
ない。したがって、その代わりに、Ｃｏ （ＮＯ３）
２ ・６Ｈ２０＋Ｎｉ （ＮＯ３） ２ ・６０２０な
どの遷移金属イオンを含む硝酸塩などの水溶液を使用す
る。塩などの濃度は０．０１〜０．１重量％が適正であ
る。または、Ｋ ２ ＣＯ３、ＣａＣ０３、Ｎａ ２
ＣＯ３１（ＮＨａ ） ２ ＳＯ４などの弱アルカリ溶
液を使用する。弱アルカリの濃度は特に限定しないが２
．０〜５．０重量％が適切である。遷移金属イオンと弱
アルカリとは併用されてもよい。The order of decolorization treatment is the same as in the conventional method, but in the method of the present invention, a strong alkaline solution is not used for activation. Therefore, instead of Co(NO3)
2.6H20+Ni (NO3) An aqueous solution such as nitrate containing transition metal ions such as 2.6020 is used. The appropriate concentration of salt, etc. is 0.01 to 0.1% by weight. Or K2CO3, CaC03, Na2
A weakly alkaline solution such as CO31(NHa)2SO4 is used. The concentration of weak alkali is not particularly limited, but 2
．． 0-5.0% by weight is suitable. A transition metal ion and a weak alkali may be used in combination.
以上のような、遷移金属イオンおよび／または弱アルカ
リを含む水溶液を塗布された単板は、アルカリ焼けが軽
いため、低濃度（好ましくは２０〜３５重量％、より好
ましくは２５重量％以下）のＨ２Ｏ２溶液を塗布するこ
とで、所定の脱色性を得ることができる。遷移金属イオ
ンおよび／または弱アルカリ溶液の塗布量、ならびにＨ
２Ｏ２熔液の塗布量は適宜に採用されてよい。塗布方法
も、ロールコータ法、フロー−コータ法、スプレー法、
浸漬法等が自由に採用されて良い。The veneer coated with an aqueous solution containing transition metal ions and/or a weak alkali, as described above, has a low concentration (preferably 20 to 35% by weight, more preferably 25% by weight or less) because the alkali burn is mild. A predetermined decolorization property can be obtained by applying the H2O2 solution. Application amount of transition metal ion and/or weak alkaline solution, and H
The amount of the 2O2 solution applied may be determined as appropriate. Application methods include roll coater method, flow coater method, spray method,
Immersion methods etc. may be freely adopted.
以下に実施例を、従来例と併せて述べる。Examples will be described below together with conventional examples.
下表の条件で脱色処理を行った。その結果は、同表の色
値欄に示す通りであり、実施例はＨ２０２濃度が低いに
もかかわらず、従来例と同等の脱色性が得られた。Decolorization treatment was performed under the conditions shown in the table below. The results are as shown in the color value column of the same table, and although the H202 concentration was low in the example, decolorization properties equivalent to those of the conventional example were obtained.
（以 下 余 白）
Ｇｏ （ＮＯ３） ２ ・６Ｈ２０，Ｎｉ （ＮＯ３）
２ ・６Ｈ２０を各単独で使用した場合、および、Ｋ
２ Ｇｏ３ 、ＣａＣＯ３、Ｎａ ２ ＣＯ３、（Ｎ
Ｈ４） ２ ＳＯａ等を各単独で使用した場合も、いず
れも、上記併用の場合と同等の脱色性が得られた。(Left below) Go (NO3) 2 ・6H20,Ni (NO3)
2. When 6H20 is used alone, and K
2 Go3 , CaCO3, Na 2 CO3, (N
Even when H4) 2 SOa and the like were used alone, decolorizing properties equivalent to those obtained when they were used in combination were obtained.
この発明の方法によれば、低濃度のＨ２Ｏ２熔液で脱色
できるため、危険物（３５重量％を超えるＨ２Ｏ２熔液
）を使用する必要がなく設備化のために極めて有効であ
る。According to the method of the present invention, it is possible to decolorize with a low concentration H2O2 solution, so there is no need to use dangerous substances (H2O2 solution exceeding 35% by weight), and it is extremely effective for equipment installation.
代理人 弁理士 松 本 武 彦Agent: Patent Attorney Takehiko Matsumoto
Claims (2)
に当たり、脱色剤として過酸化水素を用いるとともに、
活性剤として遷移金属イオンおよび／または弱アルカリ
を用いることを特徴とする木材の脱色法。(1) When decolorizing wood by applying a decolorizing agent, hydrogen peroxide is used as the decolorizing agent, and
A method for decolorizing wood, characterized by using a transition metal ion and/or a weak alkali as an activator.
の木材の脱色法。(2) The method for decolorizing wood according to claim 1, wherein the wood is a veneer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10789484A JPS60250906A (en) | 1984-05-25 | 1984-05-25 | Method of decoloring wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10789484A JPS60250906A (en) | 1984-05-25 | 1984-05-25 | Method of decoloring wood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60250906A true JPS60250906A (en) | 1985-12-11 |
Family
ID=14470763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10789484A Pending JPS60250906A (en) | 1984-05-25 | 1984-05-25 | Method of decoloring wood |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60250906A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6905520B2 (en) * | 1997-05-28 | 2005-06-14 | Stain, Inc. | Mineral stains for wood and other substrates |
-
1984
- 1984-05-25 JP JP10789484A patent/JPS60250906A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6905520B2 (en) * | 1997-05-28 | 2005-06-14 | Stain, Inc. | Mineral stains for wood and other substrates |
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