JPS6096406A - Method of decoloring wood - Google Patents

Method of decoloring wood

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Publication number
JPS6096406A
JPS6096406A JP20506483A JP20506483A JPS6096406A JP S6096406 A JPS6096406 A JP S6096406A JP 20506483 A JP20506483 A JP 20506483A JP 20506483 A JP20506483 A JP 20506483A JP S6096406 A JPS6096406 A JP S6096406A
Authority
JP
Japan
Prior art keywords
curing
wood
value
decolorization
time
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
Application number
JP20506483A
Other languages
Japanese (ja)
Inventor
吉武 賢一
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP20506483A priority Critical patent/JPS6096406A/en
Publication of JPS6096406A publication Critical patent/JPS6096406A/en
Pending legal-status Critical Current

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  • 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.

【背景技術〕[Background technology]

住宅の内装材等として、従来より、表面に木目が表現さ
れた木材が好んで使用される。しかし、自然銘木を多く
使用するとなれば非常に高価になるので、一般には、表
面に人工の化粧単板が貼着された地材が主に使用されて
いる。人工化粧単板は、安価な樹木の製材からスライス
された素材単板に脱脂、脱色および染色を施し、これを
積層成形して集成フリッチを得、これをスライスするこ
とKよって得られる。脱色は、脱脂などの前処理をした
素材単板に過酸化水素(以下、nIz(hJと略記する
)を塗布し、100℃スチーム雰囲気中で養生して脱色
する方法が行表われている。しかし、発明者の検討した
ところKよれば、このような100℃スチーム雰囲気中
での高温養生では一11〜2時間程度で脱色度が最高と
なり、2時間を越える頃から逆に色戻りが発生するよう
Kなる。さらに、この条件で脱色を継続すると、それに
つれて脱色度が低ドし、約24時間後には、はは素材単
板に近い色にまで、色戻りしてしまう。このため、最高
の脱色状態と判断される段階ですぐに湯洗処理に移す必
要があり、養生時間の調整管理が大変であった。
BACKGROUND ART Wood with wood grains expressed on its surface has traditionally been used favorably as interior material for houses. However, since using a large amount of natural wood would be very expensive, generally a base material with an artificial decorative veneer attached to the surface is mainly used. Artificial decorative veneers are obtained by degreasing, decolorizing, and dyeing raw material veneers sliced from cheap lumber from trees, laminating them to form flitches, and slicing them. For decolorization, a method has been developed in which hydrogen peroxide (hereinafter referred to as nIz (abbreviated as hJ) is applied to a veneer of material that has been pretreated such as degreasing, and the material is cured in a steam atmosphere at 100° C. to decolorize the material. However, according to the inventor's study, K found that in such high-temperature curing in a 100°C steam atmosphere, the degree of decolorization reaches its maximum after about 11 to 2 hours, and conversely, color reversion occurs after 2 hours. Furthermore, if decolorization is continued under these conditions, the degree of decolorization will gradually decrease, and after about 24 hours, the color will return to a color close to that of a veneer of material.For this reason, It was necessary to immediately proceed to the hot water washing process at the stage when the best decolorization state was determined, making it difficult to adjust and manage the curing time.

〔発明の目的〕[Purpose of the invention]

この発明は、このような事情に鑑みなされたもので、養
生中に色戻りすることなく、高い脱色度のものを得るこ
とを可能とし、かつ養生時間の管理を容易にすることを
目的とする。
This invention was made in view of the above circumstances, and aims to make it possible to obtain a product with a high degree of decolorization without color reversion during curing, and to facilitate the management of curing time. .

〔発明の量系〕[Quantity system of invention]

発明者は、上記口中を達成するために鋭意検討 5した
。その結果、この発明を完成するに至った。
The inventor conducted extensive studies in order to achieve the above-mentioned mouth feel. As a result, this invention was completed.

この発明は、木材に”脱色剤を塗布した後、ス吋−ム雰
囲気に放置して脱色木材を得る木材の脱色法であって、
雰囲気温度80℃以下で養生することを特徴とする木材
の脱色法をその要旨としている。以下に、これについて
詳細に説明する。
This invention is a method of decolorizing wood by applying a decolorizing agent to the wood and then leaving it in a steam atmosphere to obtain bleached wood, which comprises:
Its gist is a method for decolorizing wood, which is characterized by curing at an ambient temperature of 80°C or lower. This will be explained in detail below.

第1図(a)、第1図(b)、および第1図(c)は、
脱色単板のL半値、A半値、?値と養生温度との関係を
あられすグラフである。図中、第1図−(a)の破線は
発明者が設定した?値の規格値下限を示し、第1図(c
)の破線は8次値の規格値上限を示す。図にみるようK
、脱色単板の脱色度の目安となるL値(明るさ)、A値
(赤さ)、B値(黄味)を比較したとき、養生温度(養
生中の雰囲気温度)が60℃では、養生の処理時間が長
くなるにつれてL半値。
FIG. 1(a), FIG. 1(b), and FIG. 1(c) are
L half value, A half value of bleached veneer, ? This is a graph showing the relationship between the value and the curing temperature. In the figure, the broken line in Figure 1-(a) was set by the inventor? The lower limit of the standard value is shown in Figure 1 (c
) The broken line indicates the upper limit of the standard value of the 8th order value. As shown in the figure, K
When comparing the L value (brightness), A value (redness), and B value (yellowness), which are indicators of the degree of decolorization of decolorized veneer, when the curing temperature (ambient temperature during curing) is 60°C, As the curing processing time increases, the L half value decreases.

h’<直およびB’+’(直が徐々に向上している。し
かし、養生温度が100℃ではこの傾向が逆転している
h'< directness and B'+' (directness are gradually improving. However, when the curing temperature is 100°C, this tendency is reversed.

そして、養生温度が、80℃の近辺では時間の長短にあ
まり左右されないことが分かる。また、特にtM直は、
80℃を越えると著しく下限規格値を外れるようになる
。つまり、養生温度が高くなるほど色戻りを起し易くな
り、養生時間が長くなるほどこの傾向は顕著であること
をあられしている。
It can be seen that when the curing temperature is around 80°C, it is not affected much by the length of time. Also, especially the tM direct,
When the temperature exceeds 80°C, the temperature significantly deviates from the lower limit specification value. In other words, the higher the curing temperature, the more likely color reversion will occur, and the longer the curing time, the more pronounced this tendency will be.

通常、工場などにおける脱色は、数十枚から数百枚の単
板を積層した状態で養生が行なわれている。このような
多量の単板について養生処理を行なう場合、養生初期の
段階では、積層されている外部単板と最内部単板が、均
等に養生を受ける状態に至らない。このため、養生が短
時間では脱色ムラを起し易い。このようなことから、養
生にはある程度の長時間が必要となるのである。他方、
第1図(a)、第1図(b)および第1図(c)にみる
ように80℃以上の高温で養生を行なうと、養生時間の
長短による影響が顕著であるため、若干の時間差が生じ
ると色戻りが発止し易くなり、養生時間の管理が極めて
きびしくなるという問題もある。他方、一工程時間が1
日の1勤務時間に近いかまたはこれを超えるような場合
、日勤者の勤務時間を延長するか、または交替勤務体系
が必要となり、大変である。そのような場合は、むしろ
24時間に近い養生時間を選べる方がよい。
Normally, decolorization in factories and the like is carried out by curing tens to hundreds of veneers stacked together. When curing such a large amount of veneers, at the initial stage of curing, the outer veneer and the innermost veneer that are laminated do not reach a state where they are evenly cured. Therefore, if curing is carried out for a short period of time, uneven decoloration is likely to occur. For this reason, curing requires a certain amount of time. On the other hand,
As shown in Figure 1 (a), Figure 1 (b), and Figure 1 (c), when curing is performed at a high temperature of 80°C or higher, the effect of the length of curing time is significant, so there may be a slight difference in time. When this occurs, color reversion is likely to occur, and there is also the problem that curing time management becomes extremely strict. On the other hand, one process time is 1
If the work hours are close to or exceed one working day, it is difficult to extend the working hours of day workers or to adopt a shift work system. In such cases, it is better to choose a curing time that is closer to 24 hours.

したがって、高い脱色度の状態で色戻りを起すことなく
、かつ養生時間の調、整管理を容易にす、るためには、
長時間養生が可能な養生温度すなわち養生温度80℃以
下にする必要がある。さらに好ましくは60℃以下にお
いて長時間養生を行なうことが好ましい。このような条
件で養生すると例えば翌日の日勤時間に合わせるように
計画することができるので、養生工程の時間管理が極め
て容易となるのである。
Therefore, in order to prevent color reversion in a state of high decolorization and to facilitate curing time adjustment and maintenance management,
It is necessary to set the curing temperature to 80° C. or lower to enable long-term curing. More preferably, curing is performed for a long time at 60° C. or lower. When curing under these conditions, it is possible to schedule the curing to coincide with, for example, the next day's work hours, making time management of the curing process extremely easy.

この発明において使用する木材は、その種類。The types of wood used in this invention are:

太き、さなどを問わない。また、木材の前処理の有無も
問わないが、通常アルカリ液を十分浸透養生させたもの
音用いる。
It doesn't matter how thick or short it is. Although it does not matter whether the wood has been pretreated or not, wood that has been thoroughly soaked and cured with an alkaline solution is usually used.

実際には、先ずH2O2水溶液をひき板、単板などから
なる木材表面に塗布含浸駿た後、これを数十枚から数百
枚程度積層し、養生温度80℃以下のスチーム雰囲気中
(−*生室)に木材を放置するのである。この時の関係
湿度は、90〜100 %が好ましい。このような条件
では、長時間放置しても色戻りすることなく、最高の脱
色状態を維持することができるようになる。木材に塗布
する薬剤(アルカリ液、H2O2水溶液)の濃度を低く
すると、より長時間にわたって安定に良好な脱色状態を
維持できる。
In practice, first, an aqueous H2O2 solution is applied to the surface of wood made of sawn boards, veneers, etc. to impregnate it, and then tens to hundreds of sheets of this are laminated in a steam atmosphere at a curing temperature of 80°C or less (-* The wood is left in the living room). The relative humidity at this time is preferably 90 to 100%. Under these conditions, the best bleached state can be maintained without color reversion even if left for a long time. By lowering the concentration of the chemical (alkaline solution, H2O2 aqueous solution) applied to wood, a good decolorization state can be stably maintained for a longer period of time.

養生脱色中の関係湿度は、前記の如く常に高湿の状態に
しておくことが好ましい。養生中に乾燥するようなこと
になると、 H2O2が分解して脱色度が低下したり、
単板などの薄層板は割れを生じたりするからである。ま
た、脱色後の染色工程を考慮しても、含水率が高く、か
つ含水率ムラの少ない方が*ムラが少なくなるので、養
生脱色中は高湿状態が望まし粋のである。
It is preferable that the relative humidity during curing and decolorization is always kept high as described above. If it becomes dry during curing, H2O2 decomposes and the degree of decolorization decreases,
This is because thin laminates such as veneers may crack. Also, even when considering the dyeing process after decolorization, the higher the moisture content and the less uneven the moisture content, the less uneven the moisture content will be. Therefore, high humidity conditions are desirable during curing and decolorization.

この発明で使用するH2O2は、濃度、塗布量、塗布方
法など特に限定されるものではない。また、発明の効果
を妨げない範囲において、H2O2に他の畢加物を含有
させてもよい。
The H2O2 used in this invention is not particularly limited in terms of concentration, coating amount, coating method, etc. Further, other additives may be added to H2O2 within a range that does not impede the effects of the invention.

この発明にかかる脱色法によって得た単板を染色して積
層圧締し、これをスライスすると非常に色の美しい人工
化粧単板が得られる。
When the veneers obtained by the decolorization method of this invention are dyed, laminated and pressed, and then sliced, artificial decorative veneers with extremely beautiful colors can be obtained.

以下に、実施例について比較例と併せて説明する。Examples will be described below along with comparative examples.

(実施例) 厚み1. Orttx 、長さ800朋1幅200馴の
アガチス単板にアルカリを塗布した後、20時間以上養
生した。次いで、H2O2504水溶液を塗布含浸させ
、これを100枚積層して直ちに温度60℃。
(Example) Thickness 1. After applying alkali to an agathis veneer with a length of 800 mm and a width of 200 mm, it was cured for more than 20 hours. Next, a H2O2504 aqueous solution was applied and impregnated, 100 sheets of this were laminated, and the temperature was immediately heated to 60°C.

関係湿度100憾の雰囲気中(養生室)に入れて養生し
た。
It was cured in an atmosphere (curing room) with relative humidity of 100 degrees centigrade.

(比較例) 実施例と同じ単板を用いて、この単板に実施例と同様に
アルカIJ i布およびH2O2塗布含浸したもの10
0枚を積層し、直ちに温度100℃のスチーム雰囲気中
(養生室)に入れて養生した。
(Comparative example) Using the same veneer as in the example, this veneer was impregnated with Alka IJ cloth and H2O2 coating in the same manner as in the example 10
0 sheets were laminated and immediately placed in a steam atmosphere (curing chamber) at a temperature of 100° C. for curing.

実施例および比較例の脱色単板のし半値、A*値および
8軒値と養生時間との関係を第2図および第3図にあら
れした。これらの図中、L*値−養生時間の関係グラフ
における破線は規格値下限を示し、B半値−養生時間の
関係グラフにおける破線は規格値上限を示している。ま
た、L*値、A*値、B電値は、n=5の平均であられ
した。
FIGS. 2 and 3 show the relationship between the half value, A* value, and 80% value of the bleached veneers of Examples and Comparative Examples and the curing time. In these figures, the broken line in the relationship graph between L* value and curing time shows the lower limit of the standard value, and the broken line in the relationship graph between B half value and curing time shows the upper limit of the standard value. Further, the L* value, A* value, and B electric value were averaged over n=5.

実施例は、第2図にみるように養生の処理時間が30時
間に達しても、L半値が規格値内にあり、B半値も養生
直後の1〜2時間を除き、規格値内に入っていて、色戻
りを起していないことがわかる。
As shown in Figure 2, in the example, even if the curing processing time reached 30 hours, the L half value was within the standard value, and the B half value was also within the standard value except for 1 to 2 hours immediately after curing. It can be seen that there is no color reversion.

これ九対し、比較例は、第3図にみるように、養生時間
が18時間を越えるとL半値が規格値を大きく外れ、か
つバラツキも一層犬き/〈なり、色戻りが著しいことが
わかる。
On the other hand, in the comparative example, as shown in Figure 3, when the curing time exceeds 18 hours, the L half value greatly deviates from the standard value, and the variation becomes even worse, indicating that the color reversion is significant. .

〔発明の効果〕〔Effect of the invention〕

この発明にかかる木材の脱色法は、養生温度を80℃以
下にして養生を行なうようにしているので、養生中に色
戻りを起すことなく、高い脱色度のものが得られる。し
かも、養生時間の調整管理が容易になる。
In the method for decolorizing wood according to the present invention, curing is carried out at a curing temperature of 80° C. or lower, so that a high degree of decolorization can be obtained without causing color reversion during curing. Moreover, adjustment and management of curing time becomes easier.

【図面の簡単な説明】[Brief explanation of the drawing]

喀1図(a)、第1図(b)および第1図(c)は、脱
色単板のL半値、IP値、およびB米量と養生温度との
関係をあられすグラフ、第2図は実施例における脱色単
板のL半値、へ半値およびB半値と養生時間との関係を
あられすグラフ、第3図は比較例における脱色単板のL
半値、?値およびB電値と養生時間との関係をあられす
グラフである。 代理人 弁理士 松 本 武 彦 (a) (b) 養住温度(−C) (C) 第1図 可A売ネ市正書(自発) 1.事件の表示 昭和58年特許願第205064号 2、発明の名称 住 所 大阪府門真市大字門真1048番地名 称(5
83)松下電工株式会社 代表者 イl噺小林 郁 4、代理人 な し 6、補正の対象 明細書および図面 7、補正の内容 (11明細書第3頁第12〜14行に「図中・・・示す
。」とあるを削除する。 (2) 明細書第4頁第11行に1最内部単板」とある
を、「内部単板」と訂正する。 (3) 第1図(a)、(b)、(C)を別紙のとおり
訂正する。 (a) (b) 第1図
Figure 1 (a), Figure 1 (b), and Figure 1 (c) are graphs showing the relationship between the L half value, IP value, and B rice amount of decolorized veneer and curing temperature, and Figure 2 Figure 3 is a graph showing the relationship between the L half value, B half value, and B half value of the bleached veneer in the example and the curing time.
Half price? It is a graph showing the relationship between the value and the B electric value and the curing time. Agent Patent attorney Takehiko Matsumoto (a) (b) Nursing temperature (-C) (C) Figure 1 A-sale city official document (voluntary) 1. Indication of the case 1982 Patent Application No. 205064 2 Name of the invention Address 1048 Kadoma, Kadoma City, Osaka Prefecture Name (5)
83) Matsushita Electric Works Co., Ltd. Representative Iru Kobayashi 4, No agent 6, Specification subject to amendment and drawings 7, Contents of amendment (11 Specification, page 3, lines 12-14, "In the drawings... (2) In the 11th line of page 4 of the specification, the phrase ``innermost veneer'' is corrected to read ``inner veneer''. (3) Figure 1 (a) ), (b), and (C) are corrected as shown in the attached sheet. (a) (b) Figure 1

Claims (2)

【特許請求の範囲】[Claims] (1) 木材に脱色剤を塗布した後、スチーム雰囲気に
放置して脱色木材を得る木材の脱色法であって、雰囲気
温度80℃以下で養生することを特徴とする木材の脱色
法。
(1) A method for decolorizing wood, in which a decolorizing agent is applied to wood and then the wood is left in a steam atmosphere to obtain decolorized wood, which method is characterized by curing at an ambient temperature of 80° C. or lower.
(2)雰囲気温度が60℃以下である特許請求の範囲j
#!I1項記載の木材の脱色法・
(2) Claims j in which the ambient temperature is 60°C or less
#! Wood decolorization method described in Section I1
JP20506483A 1983-10-31 1983-10-31 Method of decoloring wood Pending JPS6096406A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20506483A JPS6096406A (en) 1983-10-31 1983-10-31 Method of decoloring wood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20506483A JPS6096406A (en) 1983-10-31 1983-10-31 Method of decoloring wood

Publications (1)

Publication Number Publication Date
JPS6096406A true JPS6096406A (en) 1985-05-30

Family

ID=16500827

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20506483A Pending JPS6096406A (en) 1983-10-31 1983-10-31 Method of decoloring wood

Country Status (1)

Country Link
JP (1) JPS6096406A (en)

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