JPS5996907A - Method of decoloring plain wood furniture material - Google Patents

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】 この発明は白木家具材の脱色法に関するものである。[Detailed description of the invention] This invention relates to a method for decolorizing plain wood furniture materials.

一般に、木材を白木家具の部材の形で脱色するには、Ｈ
２Ｏ２やＮａＣｌＯ４を安定剤（水ガラス、リン酸ソー
ダ等）で安定したものに、ＮａＯＨやＫＯＨ等のアルカ
リ溶液を添加して活性化し、これを被脱色体に塗布する
ことにより行われている。しかしながら、この方法では
、高い脱色性は望めず木材に充分な白木感を付与するこ
とができなかった。Generally, to bleach wood in the form of plain wood furniture parts, H
It is carried out by adding an alkaline solution such as NaOH or KOH to 2O2 or NaClO4 stabilized with a stabilizer (water glass, sodium phosphate, etc.) to activate it, and applying this to the object to be decolored. However, with this method, high decolorization properties could not be expected and it was not possible to impart a sufficient white wood feel to the wood.

発明者らは、脱色性を高めるために研究を重ねた結果、
脱色剤溶液とアルカリ溶液を混合して用いるのではなく
、脱色剤溶液とアルカリ溶液とを別個に用いると脱色性
が向上し、かつ熱処理によシそれが一層向上するように
なるため、白木家具材に対して充分な白木感を付与しう
るようになることを見いだし、この発明に到達した。As a result of repeated research to improve decolorization properties, the inventors found that
Using a bleach solution and an alkaline solution separately instead of mixing the bleach solution and an alkaline solution improves the bleaching properties, and further improves this through heat treatment. The inventors have discovered that it is possible to impart a sufficient feel of plain wood to wood, and have thus arrived at this invention.

すなわち、この発明は、白木家具材にアルカリ溶液を塗
布する工程と、このアルカリ塗布を終えた白木家具材に
脱色剤溶液を塗布する工程と、脱色剤溶液塗布を終えた
白木家具材にスチーム処理を施す工程を備えたことをそ
の特徴とするものである。That is, this invention includes a step of applying an alkaline solution to plain wood furniture material, a step of applying a bleaching agent solution to the plain wood furniture material that has been coated with the alkali, and a step of steam-treating the plain wood furniture material that has been coated with the bleaching agent solution. It is characterized by having a step of applying.

つぎに、この発明をその一例にもとづいて詳しく説明す
る。すなわち、白木家具材にアルカリ水溶液（濃度４％
（重量、以下同じ）以下）を塗布する。Next, this invention will be explained in detail based on one example. In other words, an alkaline aqueous solution (concentration 4%) is applied to plain wood furniture material.
(weight, same below) apply.

つぎに、脱色剤水溶液（濃度１５チ以上のＨ２Ｏ２水溶
液）をアルカリ水溶液が塗布された白木家具材に塗布す
る。ついで、水蒸気スチームで３０分間以上かけて熱処
理を施す。この熱処理により、部材の脱色が促進される
。この場合、アルカリおよび脱色剤が部材の表面だけで
なく内部まで比較的均一に浸透しているため、部材表面
だけでなく内部まで均一な状態の脱色が行われるように
なる。上記アルカリ溶液としては、通常、ＮａＯＨ、Ｋ
ＯＨの水溶液が用いられ、その塗布は一般に作業の簡便
さの点から浸漬によって行われる。脱色剤水溶液の塗布
も同様に浸漬によって行われる。この発明では、安定剤
はなしでもよいが、より高い脱色効果を望むならば、水
ガラス、リン酸ソーダ系等の安定剤を用いる。安定剤は
アルカリ水溶液側に添加するのが好ましい。なお、アル
カリ塗布後の脱色剤水溶液の塗布を容易にするため、ア
ルカリ塗布後に熱処理（熱風乾燥、マイクロ波加熱、ス
チーム加熱等）を施すようにしてもよい。Next, a decolorizing agent aqueous solution (H2O2 aqueous solution with a concentration of 15 or more) is applied to the plain wood furniture material coated with the alkaline aqueous solution. Then, heat treatment is performed using steam for 30 minutes or more. This heat treatment promotes decolorization of the member. In this case, since the alkali and decolorizing agent permeate not only the surface of the member but also the interior thereof relatively uniformly, decolorization is performed in a uniform state not only on the surface of the member but also inside the member. The alkaline solution is usually NaOH, K
An aqueous solution of OH is used, and its application is generally carried out by dipping for ease of operation. Application of the decolorizing agent aqueous solution is similarly carried out by dipping. In this invention, a stabilizer may not be used, but if a higher decolorizing effect is desired, a stabilizer such as water glass or sodium phosphate is used. It is preferable to add the stabilizer to the alkaline aqueous solution side. Note that, in order to facilitate the application of the decolorizing agent aqueous solution after the alkali application, heat treatment (hot air drying, microwave heating, steam heating, etc.) may be performed after the alkali application.

この発明は、以上のようにして白木家具材を脱色するた
め、高い脱色効果を得ることができ、また脱色時間の短
縮化を実現しうるようになる。In the present invention, since the white wood furniture material is bleached as described above, a high bleaching effect can be obtained, and the bleaching time can be shortened.

つぎに、実施例について比較例と併せて説明する０ 〔実施例〕 厚み１．　Ｏｒａｎのアガチス単板（心材）にＮａＯＨ
の１％水溶液（安定剤として水ガラスの２％水溶液を加
え、安定させたもの）を塗布し、マイクロ波加熱を施し
た。つぎに、Ｈ２０□０２０％水溶液を単板に塗布して
、スチームによ９２時間加熱し脱色単板を得た。Next, examples will be explained together with comparative examples.0 [Example] Thickness 1. NaOH on Oran's agathis veneer (heartwood)
A 1% aqueous solution of (stabilized by adding a 2% aqueous solution of water glass as a stabilizer) was applied and microwave heating was performed. Next, a 20% H20□020% aqueous solution was applied to the veneer and heated with steam for 92 hours to obtain a decolorized veneer.

〔比較例１〕 厚み１．０聰のアガチス単板（心材）に、ＮａＯＨ１％
　ｌ　Ｈ２Ｏ２２０％　、水ガラス２チ含む脱色剤水溶
液を塗布して一昼夜放置し脱色単板を得た。[Comparative Example 1] 1% NaOH on agathis veneer (heartwood) with a thickness of 1.0 thick
A decolorizing agent aqueous solution containing 20% H2O2 and 2 glasses of water glass was applied and left to stand overnight to obtain a decolorized veneer.

〔比較例２〕 脱色剤水溶液の塗布後、スチーム加熱を２時間した１つ
それ以外は比較レリ１と同様にして脱色単板を得た。[Comparative Example 2] A decolorized veneer was obtained in the same manner as Comparative Reli 1 except that after applying the decolorizing agent aqueous solution, steam heating was performed for 2 hours.

以との実施例および比較例で得られた脱色単板を手厚ま
で切削して内部を露呈させ、内部の脱色状態を測定した
。その結果は次表のとおシであり、実施例のものはいず
れの比較例のものよりも脱色状態が良好であることがわ
かる。The bleached veneers obtained in the following Examples and Comparative Examples were cut to a certain thickness to expose the interior, and the bleached state of the interior was measured. The results are shown in the following table, and it can be seen that the decolorization state of the examples was better than that of any of the comparative examples.

（註）び値：明るさを表わす指標で、数値が大きい程白
さが大であることを示す。(Note) Brightness value: An index that expresses brightness; the higher the value, the greater the whiteness.

一値：赤味を表わす指標で、マイナスが大きい程緑味が
大で赤薩が欠けること を示す。Single value: An index that expresses redness; the greater the negative value, the more greenness there is and the lack of redness.

ｂ７値：黄味を表わす指標で、数値が大きい程黄味が大
で青味が欠けることを示 す。b7 value: An index representing yellowness; the higher the value, the more yellowness and lack of blueness.

代理人　弁理士　松　本　武　彦 手続補正書（自発） 昭和５８年　２月２８日 ２、発明の名称 白木家具材の脱色法 ３、補正をする者 事件との関係　　　　　特許出願人 任　　所　　　　大阪府門真市大字門真１０４８番地名
　称（５８３）松下電工株式会社 代表者　　（懐［６１役小林　郁 ４、代理人 な　　　し ６、補正の対象 ７、補正の内容 する。Agent: Patent Attorney Takehiko Matsumoto Procedural Amendment (Spontaneous) February 28, 1982 2. Name of the invention: Method for decolorizing plain wood furniture materials 3. Relationship with the case of the person making the amendment Patent applicant Location: Kadoma, Osaka Prefecture Address: 1048 Kadoma, Ichi-Oaza Name (583) Matsushita Electric Works Co., Ltd. Representative (61) Iku Kobayashi 4, no representative 6, subject of amendment 7, details of amendment.

（２）明細書の発明の名称器に「白木家具材の脱色法」
とあるを、「白木家具用材の脱色法」と訂正する。(2) “Method for decolorizing plain wood furniture” in the title of the invention in the specification
The statement has been corrected to read, "Method for decolorizing plain wood furniture materials."

（３）明細書の特許請求の範囲欄の全文を別紙のとおり
に訂正する。(3) The entire text of the scope of claims column of the specification shall be corrected as shown in the attached sheet.

（４）明細書第１頁第１８行、第２頁第１１〜１２．１
４，１６．１７行、第３頁第１，４行、第４頁第１行（
合計８個所）にそれぞれ「白木家具材」とあるをいずれ
も、「白木家具用材」と訂正する。(4) Specification page 1, line 18, page 2, lines 11-12.1
Lines 4, 16 and 17, page 3, lines 1 and 4, page 4, line 1 (
(Total of 8 places) where "plain wood furniture material" is written in each place will be corrected to "plain wood furniture material."

２、特許請求の範囲 （１）白木家具用材にアルカリ溶液を塗布する工程と、
このアルカリ塗布を終えた白木家具用材に脱色剤溶液を
塗布する工程と、脱色剤溶液塗布を終えた白木家具用材
にスチーム処理を施す工程を備えたことを特徴とする白
木家具、用４材の脱色法。2. Claims (1) A step of applying an alkaline solution to plain wood furniture material;
Plain wood furniture, characterized by comprising a step of applying a bleaching agent solution to the plain wood furniture material that has been coated with the alkali, and a step of subjecting the plain wood furniture material that has been coated with the bleaching agent solution to a steam treatment. Decolorization method.

（２）脱色剤溶液の塗布工程が、アルカリ塗布を終えた
白木家具用材に熱処理を施したのち脱色剤溶液を塗布す
る工程である特許請求の範囲第１項記載の白木家具用材
の脱色法。(2) The method for decolorizing plain wooden furniture materials according to claim 1, wherein the step of applying the decolorizing agent solution is a step of applying the decolorizing agent solution after subjecting the plain wooden furniture material that has been coated with alkali to a heat treatment.

（３）脱色剤溶液が過酸化水素溶液である特許請求の範
囲第１項または第２項記載の白木家具用材の脱色法。(3) The method for decolorizing plain wood furniture materials according to claim 1 or 2, wherein the decolorizing agent solution is a hydrogen peroxide solution.

Claims (3)

【特許請求の範囲】[Claims] （１）　　白木家具材にアルカリ溶液を塗布する工程と
、このアルカリ塗布を終えた白木家具材に脱色剤溶液を
塗布する工程と、脱色剤溶液塗布を終えた白木家具材に
スチーム処理を施す工程を備えたことを特徴とする白木
家具材の脱色法。(1) A process of applying an alkaline solution to plain wood furniture material, a process of applying a bleaching agent solution to the plain wood furniture material that has been coated with the alkali, and a step of applying steam treatment to the plain wood furniture material that has been coated with the bleaching solution. A method for decolorizing plain wood furniture material. （２）脱色剤溶液の塗布工程が、アルカリ塗布を終えた
白木家具材に熱処理を施したのち脱色剤溶液を塗布する
工程である特許請求の範囲第１項記載の白木家具材の脱
色法。(2) The method for decolorizing plain wood furniture materials according to claim 1, wherein the step of applying the decolorizing agent solution is a step of applying the decolorizing agent solution after subjecting the plain wood furniture material that has been coated with alkali to a heat treatment. （３）脱色剤溶液が過酸化水素溶液である特許請求の範
囲第１項または第２項記載の白木家具材の脱色法。(3) The method for decolorizing plain wood furniture material according to claim 1 or 2, wherein the decolorizing agent solution is a hydrogen peroxide solution.