JPS6090708A - Method of decoloring wood - Google Patents
Method of decoloring woodInfo
- Publication number
- JPS6090708A JPS6090708A JP19946083A JP19946083A JPS6090708A JP S6090708 A JPS6090708 A JP S6090708A JP 19946083 A JP19946083 A JP 19946083A JP 19946083 A JP19946083 A JP 19946083A JP S6090708 A JPS6090708 A JP S6090708A
- Authority
- JP
- Japan
- Prior art keywords
- wood
- veneers
- decolorization
- decolorizing
- concentration
- 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 20
- 238000000034 method Methods 0.000 title claims description 19
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 24
- 238000004042 decolorization Methods 0.000 claims description 17
- 239000007864 aqueous solution Substances 0.000 claims description 8
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 6
- 239000012670 alkaline solution Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 2
- 239000004115 Sodium Silicate Substances 0.000 claims 1
- 239000012669 liquid formulation Substances 0.000 claims 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims 1
- 229910052911 sodium silicate Inorganic materials 0.000 claims 1
- 230000000694 effects Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 238000000354 decomposition reaction Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 2
- 238000004043 dyeing Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 generally Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 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、木材の脱色法に関する。[Detailed description of the invention] 〔Technical field〕 This invention relates to a method for decolorizing wood.
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であるので、一般には、表
面に人工の化粧単板が貼着された建材が主に使用されて
いる。化粧単板は、安価な樹木の製材からスライスされ
た素材単板に脱色および染色を施し、これを積層成形し
たフリッチをスライスすることによって得られる。BACKGROUND ART Wood with wood grains expressed on its surface has traditionally been used favorably as interior material for houses. However, since it is very expensive to use a large amount of natural wood, generally, building materials with artificial decorative veneers pasted on the surface are mainly used. Decorative veneer is obtained by decolorizing and dyeing raw material veneers sliced from inexpensive lumber from trees, and then slicing flitches made by laminating and molding the veneers.
化粧単板の生産量を増やすためには脱色や染色の工程に
おける素材単板（以下、「単板」と略す）の処理能力を
高める必要がある。しかし、従来、Ｈ２Ｏ２水浴液塗布
後の単板を養生（放置）する際に単板の積載枚数を一定
枚数以北にす・ると、２４時間の養生後には積載中層部
あたりの単板が単板間や単板内に色もどりを発生させて
しまい、単板の処理能力に不満があった。In order to increase the production volume of decorative veneers, it is necessary to increase the processing capacity of material veneers (hereinafter referred to as "veneers") in the bleaching and dyeing processes. However, conventionally, when curing (leaving) the veneers after applying the H2O2 water bath solution, if the number of veneers stacked is set north of a certain number, after 24 hours of curing, the veneers in the middle layer of the stack are This caused discoloration between and within the veneers, and there was dissatisfaction with the veneer processing ability.
そこで、この発明は、従来の脱色法におけるＨ２Ｏ１水
溶液塗布後の単板積載枚数よりも多数枚単板を積載養生
しても色もどりが発生せず、脱色処理能力が高い木材の
脱色法を提供することを目的とする。Therefore, the present invention provides a method for decolorizing wood that does not cause discoloration even if a larger number of veneers are loaded and cured than the number of veneers loaded after application of an H2O1 aqueous solution in the conventional decolorization method, and has a high decolorization ability. The purpose is to
発明者らは、鋭意検討を重ねた結果、従来の脱色処理に
おいて色もどりが発生するのは、Ｈ２Ｏ２水溶液塗布後
に積載された単板が、Ｈ２Ｏ２の分解熱が蓄熱されるこ
とＫよって長時間高熱にさらされるためであることをつ
きとめた。すなわち、従来の脱色工程においては、単板
に塗布するアルカ１１液の配合は、例えば、ＮａＯＨ３
，５〜５重量重量係号３イ酸ソーダ（ＳＳ３）８〜１０
重１１以下、「優」と略す）であり、他方、過酸化水素
（Ｈ２Ｃｈ ）水溶液の濃度は５５〜６０優と非常に高
いものであった。As a result of extensive research, the inventors found that the reason for color reversion in conventional decolorization treatment is that the veneer stacked after applying the H2O2 aqueous solution is heated to high temperatures for a long period of time due to the heat of decomposition of H2O2 being accumulated. It was determined that this was due to exposure to That is, in the conventional decolorization process, the composition of the alkaline 11 solution applied to the veneer is, for example, NaOH3
, 5~5 Weight Weight Coefficient 3 Sodium Isate (SS3) 8~10
On the other hand, the concentration of the hydrogen peroxide (H2Ch) aqueous solution was very high at 55 to 60%.
発明者らの見出しだところによれば、このような高濃度
のアルカリ液やＨ２Ｏ２水浴液を単板に塗布して脱色を
行った場合、前記のごとき分解熱の蓄熱が起きるのであ
る。そこで、発明者らは、上記の目的を達成するためさ
らに研究を重ね、この発明を完成した。According to the inventors' heading, when decolorizing a veneer by applying such a highly concentrated alkaline solution or H2O2 water bath solution, the above-mentioned accumulation of decomposition heat occurs. In order to achieve the above object, the inventors conducted further research and completed this invention.
すなわち、この発明は、木材にアルカリ液を塗布して放
置したのち、過酸化水素水浴液を塗布して放置す小木材
の脱色法であって、アルカリお上び過酸化水素の濃度を
、所定の脱色度が得られる範囲内で低いものにしている
ことを特徴とする木材の脱色法をその要旨とする。以Ｆ
、これを、その実施例に基づいて詳しく説明する。That is, this invention is a method of decolorizing small wood by applying an alkaline solution to the wood and leaving it for a while, and then applying a hydrogen peroxide bath solution and leaving it to stand. The gist of this invention is a method for decolorizing wood, which is characterized in that the degree of decolorization is as low as possible. From F
This will be explained in detail based on an example.
Ｈ２Ｏ２水溶液塗布後養生中の単板温度をＦげるために
はＨ２Ｏ２０分解熱を減らす必要がある。それには、Ｈ
２Ｏ２の濃度を下げなければならない。しかし、濃度が
ひくすぎた場合には、所望の脱色効果が得られなくなる
。したがって、Ｈ２Ｏ２の分解熱を減らし、かつ所望の
脱色効果を得るためには、Ｈ２Ｏ２の濃度、さらにそれ
に合わせてアルカリの濃度に低い範囲を設けてこれに限
定し脱色反応を緩慢にして脱色を行えば良い。例えば、
アルカリ液中のＮａＯＨおよび５Ｓ３（３号ケイ酸ノー
ダ）の濃度をそれぞれ２．０〜２，５優、４．０〜６．
０係の範囲とし、Ｉｈ０ｚ水溶液中のＨ２Ｃｈの濃度を
３０〜４５憾の範囲とする。このような範囲内の濃度を
有するアルカリ液やＨｚ（ｈ水浴液を用いて脱色処理を
行えば、養生時の単板積載枚数が従来の脱色処理におけ
る一定の積載枚数を超えるものであったとしても一部の
単板に色もどりが生じることがないのである。In order to raise the temperature of the veneer during curing after application of the H2O2 aqueous solution, it is necessary to reduce the heat of decomposition of H2O20. For that, H
The concentration of 2O2 must be reduced. However, if the concentration is too low, the desired decolorizing effect cannot be obtained. Therefore, in order to reduce the heat of decomposition of H2O2 and obtain the desired decolorizing effect, the concentration of H2O2 and the concentration of alkali should be set in a low range and limited to this range to slow down the decolorization reaction and perform decolorization. It's fine. for example,
The concentrations of NaOH and 5S3 (No. 3 silicate) in the alkaline solution were 2.0 to 2.5% and 4.0 to 6.5%, respectively.
The concentration of H2Ch in the Ih0z aqueous solution is in the range of 30 to 45. If decolorization is performed using an alkaline solution or Hz (h water bath) having a concentration within this range, the number of veneers loaded during curing will exceed the fixed number of veneers loaded in conventional decolorization. Also, some veneers do not change color.
つぎに、この発明にかかる木材の脱色法の一実施例と従
来の脱色法に基づく比較例において、Ｈ２０Ｍ水溶液塗
布後単板を５００枚積載して２４時間の養生を行ったの
ちの積載状態の単板から、それぞれ中層部の単板を取り
出してその状態を調査した。Next, in an embodiment of the wood decolorization method according to the present invention and a comparative example based on a conventional decolorization method, 500 veneers were loaded after applying an H20M aqueous solution and cured for 24 hours. The middle layer of each veneer was taken out and its condition was investigated.
以下の表に、単板の色の測定結果と色もどりの程度を示
す。Ａは実施例、Ｂは比較例である。The table below shows the results of measuring the color of the veneer and the degree of color reversal. A is an example and B is a comparative example.
（以 下 余 白）
つづいて、上記実施例Ａおよび比較例Ｂにおける養生時
間と単板温度との関係を第１図にグラフで示す。(Margins below) Next, the relationship between curing time and veneer temperature in Example A and Comparative Example B is shown graphically in FIG.
以上、第１表および第１図かられかるように、Ｈ２Ｏ２
の濃度を４０優にした場合（実施例Ａ）は、Ｈ２Ｏ２の
濃度が６０４である場合（比較例Ｂ）に比べ、養生中積
載されている単板の温度が１００℃付近の高温にある時
間が短かく、２４時間の養生後も色もどりが発生しない
。As can be seen from Table 1 and Figure 1 above, H2O2
When the concentration of H2O2 is 40% (Example A), compared to when the concentration of H2O2 is 604% (Comparative Example B), the temperature of the loaded veneer is at a high temperature of around 100℃ during curing. The time is short and the color does not change even after 24 hours of curing.
この発明にかかる木材の脱色法は、実施例では単板に対
して脱色を行うものであったが、単板以外の木質材料に
対して行われても構わない。In the method for decolorizing wood according to the present invention, a veneer is bleached in the embodiment, but the method may be applied to wood materials other than veneers.
以上のように、この発明にかかる木材の脱色法は、木材
にアルカリ液を塗布して放置したのち、過酸化水素水浴
液を塗布して放置する木材の脱色法であって、アルカリ
および過酸化水素の濃度を、所定の脱色度が得られる範
囲内で低いものにしていることを特徴としているので、
従来の脱色処理におけるＨ２Ｏ２塗布後の単板積載枚数
を超えて単板を積載しても色もどりが発生せず、単板の
脱色処理能力が向上するという効果がもたらされる。ま
た、脱色薬剤の濃度を下げることができるので、コスト
を下けることができ、Ｈ２Ｏ２の取扱いに危険が伴わな
くなるという効果ももたらされるのである。As described above, the method for decolorizing wood according to the present invention is a method for decolorizing wood in which an alkaline solution is applied to the wood and left to stand, and then a hydrogen peroxide bath solution is applied and left to stand. It is characterized by keeping the concentration of hydrogen as low as possible within the range that provides the desired degree of decolorization.
Even if veneers are stacked in excess of the number of veneers loaded after H2O2 application in the conventional decolorization process, color reversion does not occur, and the effect of improving the decolorization processing ability of the veneers is brought about. Furthermore, since the concentration of the decolorizing agent can be lowered, costs can be lowered, and there is also the effect that handling of H2O2 is no longer accompanied by danger.
第１図はこの発明にかかる木材の脱色法の一実施例にお
いて養生時間と単板温度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FIG. 1 is a graph showing the relationship between curing time and veneer temperature in an embodiment of the wood decolorization method according to the present invention. Agent Patent Attorney Takehiko Matsumoto
Claims (2)
化水素水溶液を塗布して放置する木材の脱色法であって
、アルカリおよび過酸化水素の濃度を、所定の脱色度が
得られる範囲内で低いものにしていることを特徴とする
木材の脱色法。(1) A wood decolorization method in which an alkaline solution is applied to the wood and left to stand, and then a hydrogen peroxide aqueous solution is applied and left to stand, and the concentration of alkali and hydrogen peroxide is adjusted within a range that provides a predetermined degree of decolorization. A method for decolorizing wood that is characterized by reducing the color within the interior.
．５重量係、３号ケイ酸ソーダ４．０〜６．０重量優に
定められていて、過酸化水素水溶液の濃度が３０〜４５
重量憾に定められている特許請求の範囲＠１項記載の木
材の脱色法。(2) Alkaline liquid formulation is sodium hydroxide 2.0-2
．． 5 weight, No. 3 sodium silicate 4.0 to 6.0 weight, and the concentration of hydrogen peroxide aqueous solution is 30 to 45.
A method for decolorizing wood according to claim 1, which is heavily defined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19946083A JPS6090708A (en) | 1983-10-24 | 1983-10-24 | Method of decoloring wood |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19946083A JPS6090708A (en) | 1983-10-24 | 1983-10-24 | Method of decoloring wood |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6090708A true JPS6090708A (en) | 1985-05-21 |
Family
ID=16408167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19946083A Pending JPS6090708A (en) | 1983-10-24 | 1983-10-24 | Method of decoloring wood |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6090708A (en) |
-
1983
- 1983-10-24 JP JP19946083A patent/JPS6090708A/en active Pending
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