JPS59201809A - Method of decolorizing wood veneer - Google Patents
Method of decolorizing wood veneerInfo
- Publication number
- JPS59201809A JPS59201809A JP7707083A JP7707083A JPS59201809A JP S59201809 A JPS59201809 A JP S59201809A JP 7707083 A JP7707083 A JP 7707083A JP 7707083 A JP7707083 A JP 7707083A JP S59201809 A JPS59201809 A JP S59201809A
- Authority
- JP
- Japan
- Prior art keywords
- decolorizing
- wood veneer
- wood
- curing
- alkali
- 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
- 239000002023 wood Substances 0.000 title claims description 46
- 238000000034 method Methods 0.000 title claims description 16
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 38
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 20
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 10
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 10
- 238000005470 impregnation Methods 0.000 claims description 9
- 239000012670 alkaline solution Substances 0.000 claims description 6
- 101001018064 Homo sapiens Lysosomal-trafficking regulator Proteins 0.000 claims description 2
- 102100033472 Lysosomal-trafficking regulator Human genes 0.000 claims description 2
- 235000010703 Modiola caroliniana Nutrition 0.000 claims description 2
- 244000038561 Modiola caroliniana Species 0.000 claims description 2
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 2
- 235000012239 silicon dioxide Nutrition 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- 239000003513 alkali Substances 0.000 description 21
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 18
- 238000004042 decolorization Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 11
- 239000007844 bleaching agent Substances 0.000 description 8
- 239000004115 Sodium Silicate Substances 0.000 description 7
- 238000000354 decomposition reaction Methods 0.000 description 7
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 7
- 229910052911 sodium silicate Inorganic materials 0.000 description 7
- 239000003381 stabilizer Substances 0.000 description 7
- 239000007788 liquid Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 239000007864 aqueous solution Substances 0.000 description 4
- 238000005507 spraying Methods 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- 238000004061 bleaching Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- WMFOQBRAJBCJND-UHFFFAOYSA-M Lithium hydroxide Chemical compound [Li+].[OH-] WMFOQBRAJBCJND-UHFFFAOYSA-M 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 229920000592 inorganic polymer Polymers 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 241001337993 Agathis <wasp> Species 0.000 description 1
- 235000015392 Sesbania grandiflora Nutrition 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 210000000170 cell membrane Anatomy 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003712 decolorant Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 239000000391 magnesium silicate Substances 0.000 description 1
- 229910052919 magnesium silicate Inorganic materials 0.000 description 1
- 235000019792 magnesium silicate Nutrition 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000010534 mechanism of action Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 210000004872 soft tissue Anatomy 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 210000001519 tissue Anatomy 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
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、木材単板の脱色法に関する。[Detailed description of the invention] 〔Technical field〕 This invention relates to a method for decolorizing wood veneers.
従来、木材単板を脱色するのに、数枚〜数百枚の単板を
準備し、単板と単板の間に隙間を形成させて積層し、こ
れを脱色剤を含む浴の中に浸漬して脱色処理を行なって
いる。この時、浴は加温して反応を促進させながら脱色
を行なうが、木材単板の内部まで比較的均一に脱色する
には長時間（２〜７時間）かかり、大量のエネルギーを
必要とする。また、一度脱色に用いた浴には、木材から
でる抽出分が蓄積するため、脱色効率が大巾に下がり、
数回毎に浴を廃棄して再建浴してやらねばならない。こ
の廃液には、残留の脱色剤がかなりの９含まれているの
で、公害対象物として廃棄にコヌトがかさむと共に、脱
色剤をムダに捨てていることにもなり、脱色コストに大
さく影響している。このような欠点を解消するため、脱
色剤を木材単板に塗布することにより、省廃液、省資源
。Traditionally, to bleach wood veneers, several to several hundred veneers are prepared, stacked with gaps formed between them, and then immersed in a bath containing a bleaching agent. Decolorization treatment is carried out. At this time, the bath is heated to accelerate the reaction and decolorize, but it takes a long time (2 to 7 hours) and a large amount of energy to decolorize the wood veneer relatively uniformly. . In addition, once the bath is used for decolorizing, extracts from the wood accumulate, which greatly reduces the decolorizing efficiency.
The bath must be discarded and rebuilt every few times. This waste liquid contains a considerable amount of residual decolorizing agent, so it costs a lot of money to dispose of it as a pollution object, and it also means that the decolorizing agent is wasted, which greatly affects decolorizing costs. ing. In order to eliminate these drawbacks, we save waste liquid and resources by applying decolorizing agent to the wood veneer.
省エネルギーを達成し、脱色コストの低減を図ろうとす
る試みが行なわれている。しかし、目的とする木材単板
の内部まで均一に脱色するには効果が十分でなく、特に
、脱色が困難な心材部などは満足すべき状況ではなかっ
た。Attempts are being made to achieve energy savings and reduce decolorization costs. However, the effect was not sufficient to uniformly bleach the interior of the target wood veneer, and the situation was not satisfactory, especially in the heartwood, where bleaching is difficult.
この発明は、このような事情に鑑みなされたもので、木
材単板の内部まで均一に効率よく藤色することを可能と
する木材単板の脱色法を提供することを目的とする。The present invention was made in view of the above circumstances, and an object of the present invention is to provide a method for decolorizing a wood veneer that makes it possible to uniformly and efficiently dye the inside of the wood veneer a mauve color.
発明者らは、このような目的を達成するため鋭意検討す
ることとした。そして、従来の方法においては脱色剤が
効率よく働いていなかったのではないかと考え、脱色剤
の用い方と脱色剤の作用効果との関係について検討を進
めた。その結果、−浴混入ではなく、活性化促進剤であ
るアルカリと脱色剤である過酸化水素 （以下Ｈ２Ｏ２
と略記する）音別々に用いて処理することとすれば、Ｈ
２Ｏ２のアルカリ活性化による自己分解ロスが抑制され
、Ｈ２Ｏ２全量が有効に脱色に寄与することを見出し、
この発明を完成するに至った。The inventors decided to conduct intensive studies in order to achieve such an objective. Considering that decolorizing agents may not be working efficiently in conventional methods, researchers investigated the relationship between how decolorizing agents are used and their effects. As a result, - rather than bath contamination, alkali which is an activation accelerator and hydrogen peroxide (hereinafter referred to as H2O2
(abbreviated as )), if the sounds are processed separately, H
It was discovered that self-decomposition loss due to alkali activation of 2O2 is suppressed, and the total amount of H2O2 effectively contributes to decolorization,
This invention was completed.
したがって、この発明は、木材単板の脱色において、木
材単板にアルカリ液を含浸させ、次いで、Ｈ２Ｏ２水を
含浸させることを特徴とする木材単板の脱已法をその要
旨としている。以下これについて詳、￥ｆｆｌに説明す
る。Therefore, the gist of the present invention is a method for decolorizing a wood veneer, which is characterized by impregnating the wood veneer with an alkaline solution and then impregnating it with H2O2 water. This will be explained in detail below.
この発明でいう含浸とは、塗布または浸漬などをいう。Impregnation as used in this invention refers to coating or dipping.
木材単板を脱色する場合の脱色機構は、一般に、次のよ
うに考えられる。すなわち、まず、脱色剤が木材表面に
拡散し、次いで、脱色剤が木材の通導部（導管、仮導管
、放射組織など）を伝って浸透しながら脱色する。引続
き、脱色剤が木材の実質部（細胞膜、柔組織など）を拡
散しながら脱色する。ところがＨ２Ｏ２系脱色剤を用い
る場合において、Ｈ２Ｏ２の活性剤としてアルカリを一
浴混合して使用しているとさけ、木材を！脱色すると同
時ン′こ、他方ではアルカリの活性化を受けてＨ２Ｏ２
の自己が屏も併行して起っていると推察される。The bleaching mechanism for bleaching wood veneers is generally considered as follows. That is, first, the bleaching agent diffuses onto the surface of the wood, and then the bleaching agent penetrates through the conductive parts (ducts, tracheids, radial tissues, etc.) of the wood and decolors. Subsequently, the bleaching agent diffuses and bleaches the wood's parenchymal parts (cell membranes, soft tissues, etc.). However, when using a H2O2-based decolorizer, if you mix alkali as an activator for H2O2 in one bath, you can avoid damaging the wood! At the same time as decolorization, on the other hand, H2O2 is activated by alkali.
It is inferred that the self and the folding are occurring simultaneously.
この発明に７りλかる単板の脱色処理法は、アルカリと
Ｈ２Ｏ２ｉ−浴でなく、別々に用いるようにすることに
よって、脱色剤が小板の内ｊ：１もＶＣ浸入して脱色り
作用付完了する土での時間内に、アルカリによってＨ２
Ｏ２が自己分解するのを抑制し、効率よく脱色が行なわ
Ｊ′Ｌ、るようＶｃｆることを特徴とするものである。The method for decolorizing a veneer according to this invention uses separate alkaline and H2O2i baths, rather than using an alkali bath and a H2O2i bath, so that the decolorant penetrates VC into j:1 of the platelets and causes decolorization. Within the time it takes for the soil to finish attaching, H2 is removed by the alkali.
It is characterized by suppressing self-decomposition of O2 and efficiently decolorizing J'L, Vcf.
つまり、先に、木材単板にアルカリを含浸さ亡“Ｃ木材
単板内部にアルカリ全浸透さセ’（オき、この後、Ｈ２
Ｏ２を含浸させる。これンこより、先に浸透−したアル
カリが単板の内部でＨ２０２を迎える状態となるので、
従来法の叩く一浴混合による両者が会合するような状態
を呈することがない。このため、アルカリにょるＨ２Ｏ
２の自己分解ロスがなくなり、Ｈ２Ｏ２が効ゐよく′脱
色に寄与するので、ちる。In other words, first, the wood veneer is impregnated with alkali.
Impregnate with O2. From this point on, the alkali that has penetrated earlier reaches H202 inside the veneer, so
The conventional method of mixing in one bath by beating does not cause the two to come together. For this reason, alkaline H2O
The self-decomposition loss of 2 is eliminated, and H2O2 effectively contributes to decolorization.
この発明にか力諷る木材単板の含浸処理法におい−Ｃ１
木４オ）株根は、通常、厚み０．５〜１，５■のものが
用いられるが、これに限定されるものではない。In the impregnation treatment method for wood veneer that is highly praised by this invention-C1
Tree 4e) The roots of the stock usually have a thickness of 0.5 to 1.5 cm, but are not limited to this.
アルカリとしては、ＮａＯＨ、ＫＯＨ、ＬｉＯＨなどが
用いられる。アルカリ液の濃度は１〜１０重量係重量板
のアルカリ液含浸量は５０〜３００ｇ／ｍ２が好ましい
。また、Ｈ２Ｏ２の濃度は１０〜６０重量係、単板のＨ
２Ｏ２水の含浸量は５０〜３００ ｇ／ｍ２が好ましい
。As the alkali, NaOH, KOH, LiOH, etc. are used. The concentration of the alkaline liquid is preferably 1 to 10 by weight, and the amount of alkaline liquid impregnated into the weight plate is preferably 50 to 300 g/m2. In addition, the concentration of H2O2 is 10 to 60% by weight, and the H2O2 concentration of the veneer is
The amount of 2O2 water impregnated is preferably 50 to 300 g/m2.
この発明では、木材単板内部へのアルカリおよびＨ２Ｏ
２の浸透を促進し、均一に効率よく脱色を行なうために
、必要に応じて、アルカリ含浸後および／まだはＨ２Ｏ
２含浸後に養生を行なう。すなわち、木材単板にアルカ
リを含浸した後、例えば室温放置などで養生を行なうと
アルカリが木材単板の内部まで均一に浸透する。また、
Ｈ２Ｏ２を含浸した後、例えばスチーム雰囲気にさらす
などの養生を行なうと、Ｈ２Ｏ２は木材単板の内部へ浸
透し、先に内部へ浸透しているアルカリと会合する。こ
のとき、Ｈ２Ｏ２は、分解に必要な一定比率のアルカリ
で活性化を受けながら、木材単板内部の着色部分の極〈
近傍で脱色を行なうのである。養生としては、アルカリ
含浸後の養生またはＨ２Ｏ２含没後の養生の各単独養生
でもよい。アルカリ含浸後の養生としては、ビニールシ
ートなどで密封した状態で行なう室温養生が好ましい。In this invention, alkali and H2O inside the wood veneer
In order to promote the penetration of 2 and perform decolorization uniformly and efficiently, if necessary, add H2O
2.Cure after impregnation. That is, if a wood veneer is impregnated with an alkali and then cured, for example, by leaving it at room temperature, the alkali will uniformly penetrate into the inside of the wood veneer. Also,
After being impregnated with H2O2, when curing is performed, for example by exposing it to a steam atmosphere, the H2O2 penetrates into the interior of the wood veneer and combines with the alkali that has previously penetrated into the interior. At this time, H2O2 is activated by a certain proportion of alkali necessary for decomposition, and is activated by the colored part inside the wood veneer.
Decolorization is carried out in the vicinity. The curing may be carried out individually, such as curing after alkali impregnation or curing after H2O2 impregnation. For curing after alkali impregnation, it is preferable to cure at room temperature while sealed with a vinyl sheet or the like.
まだ、Ｈ２Ｏ２含没後の養生は、スチーム養生が好まし
く行なわれる。However, steam curing is preferably carried out for curing after H2O2 impregnation.
養生は、アルカリおよびＨ２Ｏ２の浸透を促進し、木材
単板の内部まで均一に脱色を行なうことができればよく
、前記条件に特に限定されるものではない。The curing is not particularly limited to the above conditions as long as it can promote the penetration of alkali and H2O2 and uniformly decolorize the interior of the wood veneer.
次に、この発明においては、アルカリで活性化されだＨ
２Ｏ２の自己分解全積極的に抑制しながらより一層有効
に脱色を進行させるだめに、′珪酸ソーター、硫酸マグ
ネシウムなどをＨ２Ｏ２安定剤として使用することがで
きる。具体的には、珪酸ソーダをアルカリ液に混入し、
硫酸マグネシウムをＨ２Ｏ２液に混入して使用される。Next, in this invention, H
In order to further effectively decolorize while actively suppressing the self-decomposition of 2O2, silicic acid sorter, magnesium sulfate, etc. can be used as a H2O2 stabilizer. Specifically, by mixing sodium silicate into an alkaline solution,
Magnesium sulfate is used by mixing it with H2O2 liquid.
すなわち、これらＨ２Ｏ２安定剤の効果は、上記組合せ
によって発揮される。逆の組合せ、つまり、珪酸ソーダ
をＨ２Ｏ２に、硫酸マグネシウムをアルカリに混入した
場合は、ゲル化゛まだは沈殿が生じて効果がほとんど発
揮されない。これらＨ２Ｏ２安定剤の作用は明らかでな
いが、次のように考えられる。つまり、珪酸ソーダおよ
び硫酸マグネシウムは、無機高分子ニなり易い。この無
機高分子がＨ２Ｏ２をキャッチし、Ｈ２Ｏ２の自己分解
を抑制させるだめに、より有効な脱色が、木材単板内部
まで均一に行なわれると推定される。That is, the effects of these H2O2 stabilizers are exhibited by the above combination. When the reverse combination is used, that is, when sodium silicate is mixed with H2O2 and magnesium sulfate is mixed with an alkali, precipitation occurs before gelation occurs, resulting in little effect. Although the action of these H2O2 stabilizers is not clear, it is thought to be as follows. In other words, sodium silicate and magnesium sulfate tend to be inorganic polymers. Since this inorganic polymer catches H2O2 and suppresses self-decomposition of H2O2, it is presumed that more effective decolorization is uniformly carried out inside the wood veneer.
Ｈ２Ｏ２安定剤の使用形態としては、ケイ酸ソーダをア
ルカリに混入して脱色する方法および／または硫酸マグ
ネシウムをＨ２Ｏ２に混入して脱色する方法のいずれも
脱色効果は大きいが、特に両者の方法を併用した場合に
、最も脱色効果が顕著である。特に、木材では、非常に
脱色が困難とされているような心材部などに対しても、
内部まで均一に脱色することができるのである。これら
の作用機構は明らかではないが、硫酸マグネシウムと珪
酸ンーターが脱色時に複雑な複合組成物を形成し、Ｈ２
Ｏ２をより効率よく作用させているのではないかと考え
られる。このよりなＨ２Ｏ２安定剤の混入量は、脱色す
る木材単板の樹種などにより適宜調整して決めればよい
。なお、Ｈ２Ｏ２安定剤の欧州に際し、前記養生と組合
わせて脱色を行なうとより一層すぐれた脱色効果を得る
ことができる。H2O2 stabilizers can be used by mixing sodium silicate with alkali to decolorize them and/or by mixing magnesium sulfate into H2O2 to decolorize them, both of which have great decolorizing effects, but especially when both methods are used in combination. The decolorizing effect is most pronounced when In particular, it can be applied to the heartwood of wood, which is extremely difficult to bleach.
This allows for uniform decolorization to the inside. Although their mechanism of action is not clear, magnesium sulfate and silicate nitrate form a complex composition during decolorization, and H2
It is thought that O2 is made to act more efficiently. The amount of the H2O2 stabilizer to be mixed may be determined by adjusting the amount depending on the species of the wood veneer to be bleached. In addition, when using the H2O2 stabilizer, an even better decoloring effect can be obtained if decolorization is performed in combination with the curing described above.
以下に、実施例について詳細に説明する。Examples will be described in detail below.
木材単板としてアガチス材の辺材部と心材部を用いた。 The sapwood and heartwood of agathis wood were used as the wood veneer.
これら全２重置板（以下係と略す）ＮａＯＨ水溶液に１
分間浸漬した後、ポリエチレンシートで密封して１昼夜
室温養生した。その後、２０４Ｈ２０２水溶液に１分間
浸漬した後、これを１００℃のスチーム養生器に入れて
３０分間養生し、脱色を行なった。All of these double-layered plates (hereinafter abbreviated as holders) were placed in a NaOH aqueous solution with 1
After being immersed for a minute, it was sealed with a polyethylene sheet and cured at room temperature for one day and night. Thereafter, after being immersed in a 204H202 aqueous solution for 1 minute, it was placed in a steam incubator at 100°C and cured for 30 minutes to decolorize it.
〔実施例２〕
実施例１と同じ木材単板を使用した。これらに４ ’１
６ ＮａＯＨ水溶液をスプレー塗布した後、ポリエチレ
ンシートで密封して３昼夜室温養生した。その後、３５
％Ｈ２Ｏ２水浴液をゴムロールで塗布した後、１００℃
で１時間スチーム養生して脱色を行なった。[Example 2] The same wood veneer as in Example 1 was used. 4'1 to these
6 After spray coating the NaOH aqueous solution, the sample was sealed with a polyethylene sheet and cured at room temperature for 3 days and nights. After that, 35
%H2O2 water bath solution was applied with a rubber roll and then heated to 100°C.
Decolorization was performed by steam curing for 1 hour.
〔実施例３〕
実施例１と同じ木材単板を使用した。これらに３ ’ｉ
＝ ＮａＯＨと５係の３号珪酸ソーダの混入水浴液をス
プレー塗布し、以下は実施例１と同一条件で処理して脱
色を行なった。[Example 3] The same wood veneer as in Example 1 was used. 3'i to these
= A water bath solution containing NaOH and No. 3 sodium silicate of Part 5 was spray applied, and the following treatment was carried out under the same conditions as in Example 1 to perform decolorization.
〔実施例４〕
実施例１と同じ木材単板を使用した。実施例１と同一条
件でアルカリ含浸および養生を行なった木材単板に、２
５係のＨ２Ｏ２と１％の硫酸マグネシウムの混入水溶液
をスプレー塗布した後、１００℃で２時間スチーム養生
して脱色を行なった。[Example 4] The same wood veneer as in Example 1 was used. A wood veneer that had been impregnated with alkali and cured under the same conditions as in Example 1 was
After spraying an aqueous solution containing H2O2 (Part 5) and 1% magnesium sulfate, it was decolorized by steam curing at 100° C. for 2 hours.
〔実施例５〕
実施例１と同じ木材単板を使用した。５チＮａＯＨと８
係の３号珪酸ソーダの混入水浴液をスプレー塗布した。[Example 5] The same wood veneer as in Example 1 was used. 5 Ch NaOH and 8
A water bath solution mixed with No. 3 sodium silicate was applied by spraying.
次いで、２５ ％ Ｈ２Ｏ２と２係硫酸マグネシウム混
入水をスプレー塗布し、１００℃で３０分間スチーム養
生して脱色を行なった。Next, water mixed with 25% H2O2 and dihydric magnesium sulfate was applied by spraying, and decolorization was performed by steam curing at 100° C. for 30 minutes.
〔実施例６〕
実施例５に２いて、アルカリ塗布後に２昼夜の室温養生
を行なった以外は、実施例５と全く同一条件で脱色を行
なった。[Example 6] Decolorization was carried out under exactly the same conditions as in Example 5, except that after alkali application, room temperature curing was performed for two days and nights.
なお、実施例１〜６の木材単板に対するＮａＯＨおよび
Ｈ２Ｏ２の含浸量および脱色度を第１表にあられした。Table 1 shows the impregnated amounts of NaOH and H2O2 and the degree of decolorization for the wood veneers of Examples 1 to 6.
（以 下 余 白）
第１表にみるように、実施例１〜６はいずれも脱色効果
が認められる。特に、Ｈ２Ｏ２安定剤とし−ご珪酸ソー
ダと硫酸マグネシウムの両刀を使用した実施例５，６は
、脱色が困難な心材部でもすぐれた脱色効果が認められ
る。(Margin below) As shown in Table 1, the decolorizing effect is observed in all Examples 1 to 6. In particular, in Examples 5 and 6, in which both sodium silicate and magnesium sulfate were used as the H2O2 stabilizer, an excellent decolorizing effect was observed even in the heartwood, which is difficult to decolor.
この発明にかかる木材単板の脱色法は、別々に、まず木
材単板にアルカリ液を含浸させ、次いでＨ２Ｏ２を含浸
させるようにしたので、Ｈ２Ｏ２の自己分解ロスが抑制
され、心材部のような脱色困難な木材単板でも、内部ま
で均一に効率よく脱色することができるようになる。こ
のため、従来の脱色法などに比較して著しく脱色効果が
向上し、省廃液、省資源、省エネルギーにも寄与するの
で、コストダウンを図ることができる。In the method for decolorizing wood veneers according to the present invention, the wood veneers are first impregnated with an alkaline solution and then impregnated with H2O2, so that self-decomposition loss of H2O2 is suppressed and the loss of color in the heartwood area is suppressed. Even wood veneers that are difficult to bleach can now be bleached uniformly and efficiently to the inside. For this reason, the decolorizing effect is significantly improved compared to conventional decolorizing methods, etc., and it also contributes to saving waste liquid, saving resources, and saving energy, so that costs can be reduced.
代理人 弁理士 松 本 武 彦Agent: Patent Attorney Takehiko Matsumoto
Claims (7)
を含浸させ、次いで、過酸化水素水を含浸させることを
特徴とする木材単板の脱色法。(1) A method for decolorizing a wood veneer, which comprises impregnating the wood veneer with an alkaline solution and then impregnating it with a hydrogen peroxide solution.
の範囲第１項記載の木材単板の脱色法。(2) A method for decolorizing a wood veneer according to claim 1, wherein curing is performed after impregnation with an alkaline solution.
許請求の範囲第２項記載の木材単板の藤色法。(3) Curing is done by leaving it at room temperature48
The mauve method for wood veneer according to claim 2.
範囲＠１項から第３項までのいずれかに記載の木材単板
の脱色法。(4) A method for decolorizing a wood veneer according to any one of claims 1 to 3, wherein curing is performed after impregnation with hydrogen peroxide solution.
なわれるものである特許請求の範囲第４項記載の木材単
板の脱色法。(5) A method for decolorizing a wood veneer according to claim 4, wherein the curing is carried out by leaving it in a steam atmosphere.
である特許請求の範囲第１項から第５項までのいずれか
に記載の木材単板の脱色法。(6) A method for decolorizing a wood veneer according to any one of claims 1 to 5, wherein the alkaline solution contains silicic acid powder.
のである特許請求の範囲第１項から第６項までのいず庇
かに記載の木材単板の脱色法。(7) A method for decolorizing a wood veneer according to any one of claims 1 to 6, wherein the hydrogen peroxide solution is mixed with magnesium sulfate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7707083A JPS59201809A (en) | 1983-04-30 | 1983-04-30 | Method of decolorizing wood veneer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7707083A JPS59201809A (en) | 1983-04-30 | 1983-04-30 | Method of decolorizing wood veneer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59201809A true JPS59201809A (en) | 1984-11-15 |
Family
ID=13623529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7707083A Pending JPS59201809A (en) | 1983-04-30 | 1983-04-30 | Method of decolorizing wood veneer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59201809A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096407A (en) * | 1983-10-31 | 1985-05-30 | 松下電工株式会社 | Method of decoloring woody veneer |
-
1983
- 1983-04-30 JP JP7707083A patent/JPS59201809A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096407A (en) * | 1983-10-31 | 1985-05-30 | 松下電工株式会社 | Method of decoloring woody veneer |
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