JPH0362524B2 - - Google Patents

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Publication number
JPH0362524B2
JPH0362524B2 JP57191382A JP19138282A JPH0362524B2 JP H0362524 B2 JPH0362524 B2 JP H0362524B2 JP 57191382 A JP57191382 A JP 57191382A JP 19138282 A JP19138282 A JP 19138282A JP H0362524 B2 JPH0362524 B2 JP H0362524B2
Authority
JP
Japan
Prior art keywords
veneer
degreasing
solution
wood
aqueous solution
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.)
Expired - Lifetime
Application number
JP57191382A
Other languages
Japanese (ja)
Other versions
JPS5979718A (en
Inventor
Tatsuo Ito
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 JP19138282A priority Critical patent/JPS5979718A/en
Publication of JPS5979718A publication Critical patent/JPS5979718A/en
Publication of JPH0362524B2 publication Critical patent/JPH0362524B2/ja
Granted legal-status Critical Current

Links

Description

【発明の詳細な説明】[Detailed description of the invention]

本発明は木質単板など木材の脱脂処理法に関す
るものである。 原木をロータリースライスなどして得られる木
質単板は、春材色や夏材色に染色したのちに接着
剤を介して多数枚積層圧締して集成フリツチ化
し、この集成フリツチを積層面と交叉する面でス
ライスして、突板などとして用いる人工化粧単板
に加工される。そして木質単板を上記のように染
色処理するにあたつては、その前に脱脂処理や脱
色処理が行なわれる。すなわち素材の木質単板を
95±2℃に加熱されたNa2CO3の1%溶液中に1
時間程度浸漬することにより脱脂処理を行なつて
ヤニ分などの除去をし、次で例えばNa2Si3O70.4
%、MgSO4・7H2O0.04%、NaOH0.25%、
H2O21.8%(初期濃度)の配合で形成される60±
5℃に加温した脱色液中にこの木質単板を1〜3
時間程度浸漬することにより脱色処理を施し、こ
の後に例えば95±2℃の熱水中に30秒間程度木質
単板を通して湯洗処理したのちに染色処理を施す
のである。しかしながら上記脱脂処理にあつて、
処理温度が95±2℃と高温で行なわれるため、木
質単板中より溶出分がこの脱脂処理の際に抽出さ
れ易く、この処理の際に木質単板の強度が劣化
し、木質単板より作成した集成フリツチをスライ
スするときにいわゆる目ボレが発生し易くなると
いう問題があつた。しかもこのように95±2℃と
いう高温で脱脂処理を行なうために長時間の処理
を行なうと木材に黄色化やアルカリ焼けが生じる
ことになつて長時間の処理が行なえず、ヤニの中
でも中ヤニ、濃ヤニや赤ヤニの除去は十分行なえ
ないという問題もあつた。 本発明は上記の点に鑑みてなされたものであつ
て、木材の強度が低下するようなおそれなく、し
かもヤニの除去を十分に行なうことができる木材
の脱脂処理法を提供することを目的とするもので
ある。 しかして本発明は、木材のヤニ部分にアルカリ
溶液を予め塗布し、次いで60±5℃に加温した脱
脂溶液中で木材の脱脂処理を行なうことにより上
記目的を達成したものであり、以下本発明を詳細
に説明する。 脱脂溶液としては、通常Na2CO3の0.5〜2.0%
水溶液やNaOHの0.2〜1.0%水溶液を用いること
ができ、この脱脂溶液を60±5℃に加温した状態
で木質単板など木材を1〜5時間浸漬することに
より脱脂処理を行なうものである。ここで、脱脂
溶液が65℃を超えた温度に加熱して用いられると
木材の劣化が大きくなつて強度低下を来すもので
あり、また55℃より低い温度では脱脂処理が十分
に行なわれないものである。ここで、アガチス単
板を脱脂処理する場合のアガチス単板の処理温度
と引張強度との関係を第1表に示す。
The present invention relates to a method for degreasing wood such as wood veneer. Wooden veneers obtained by rotary slicing raw wood are dyed in spring wood color or summer wood color, and then laminated and pressed together using adhesive to form a laminated fritsch. It is sliced on the surface to be processed into artificial decorative veneers for use as veneers, etc. Before dyeing the wood veneer as described above, degreasing and bleaching are performed. In other words, the material is wood veneer.
1 in a 1% solution of Na 2 CO 3 heated to 95 ± 2 °C.
Degreasing treatment is performed by soaking for about an hour to remove resin, etc., and then, for example, Na 2 Si 3 O 7 0.4
%, MgSO47H2O0.04 %, NaOH0.25%,
60± formed by a formulation of H2O2 1.8% (initial concentration)
Place 1 to 3 pieces of this wood veneer in a decolorizing solution heated to 5℃.
Decolorization is performed by immersing the board for about an hour, and then the wooden veneer is passed through hot water at, for example, 95±2°C for about 30 seconds, and then washed in hot water, followed by dyeing. However, in the above degreasing process,
Since the treatment is carried out at a high temperature of 95±2°C, eluted substances from the wood veneer are easily extracted during this degreasing treatment, and the strength of the wood veneer deteriorates during this treatment, making it stronger than the wood veneer. There was a problem that so-called eye blur tends to occur when slicing the created assembled fritsch. Moreover, if the degreasing treatment is carried out at a high temperature of 95 ± 2°C for a long time, the wood will turn yellow and become burnt with alkali, making it impossible to carry out long-term treatment. There was also the problem that dark tar and red tar could not be removed sufficiently. The present invention has been made in view of the above points, and an object of the present invention is to provide a method for degreasing wood that can sufficiently remove resin without causing any fear that the strength of the wood will decrease. It is something to do. Therefore, the present invention has achieved the above object by applying an alkaline solution to the resin part of the wood in advance, and then degreasing the wood in a degreasing solution heated to 60±5°C. The invention will be explained in detail. As a degreasing solution, usually 0.5-2.0% of Na2CO3
An aqueous solution or a 0.2 to 1.0% aqueous solution of NaOH can be used, and the degreasing process is performed by soaking wood such as wood veneer for 1 to 5 hours in this degreasing solution heated to 60±5°C. . If the degreasing solution is heated to a temperature exceeding 65°C, the degreasing of the wood will increase and its strength will decrease, and if the degreasing solution is used at a temperature lower than 55°C, the degreasing treatment will not be carried out adequately. It is something. Here, Table 1 shows the relationship between the treatment temperature and tensile strength of the agathis veneer when the agathis veneer is degreased.

【表】 そして本発明にあつてはこのように比較的低い
温度で脱脂処理を行なうために5時間程度まで処
理時間を長くとることができるものである。従つ
て脱脂処理に時間を十分にとつて、ヤニ成分のき
つい中ヤニの除去が可能になる。しかしこのよう
に脱脂溶液に木材を浸漬して処理するだけでは濃
ヤニの除去は不十分な場合がある。このために本
発明では、本質単板のヤニ部分にアルカリ溶液を
予め塗布しておき、これを脱脂処理に供するよう
にしている。塗布するアルカリ溶液としては例え
ばNa2CO3やNaOHの1〜10%水溶液を用いるこ
とができ、このアルカリ溶液を塗布したのち1〜
3昼夜程度放置してアルカリ溶液がヤニ部に十分
作用するようにするのが好ましい。このようにヤ
ニ部分にアルカリ溶液を予め塗布しておいて脱脂
処理をおこなうことによつて、ヤニ成分の濃ヤニ
の除去も可能になり、ヤニ除去を十分におこなう
ことができるものである。 このように脱脂処理を行なつたのち、木材とし
て木質単板を用いた場合、例えばNa2Si3O70.4
%、MgSO4・7H2O0.04%、NaOH0.15%、
H2O21.5〜2.5%(初期濃度)の配合の脱色液に脱
色液を60±5℃に加温した状態で1〜3時間浸漬
することにより脱色処理を施し、次で95±2℃の
熱水中に30秒間程度通してこれを湯洗処理し、さ
らにこの木質単板に染色を施して乾燥させ、あと
はこの木質単板を用いて集成フリツチ化し、集成
フリツチをスライスすることにより突板用人工化
粧単板を得るのである。ここで、上記のような条
件で脱脂処理を行なつたあと脱色処理を行なう
と、脱色処理時間当りの脱色度が向上し、脱色処
理時間を短縮化することができることも確認され
ており、また比較的低温で脱脂処理を行なうため
に脱脂溶液の加温に要するエネルギー量を低減
(従来の2/3程度で済む)できるものである。 次に上記本発明を従来例及び実施例及び比較例
によつて具体的に説明する。 実施例 1 1.0mm厚のアガチス素材単板を定寸にカツトし
たのち、アルカリ溶液としてNa2CO3の10%水溶
液をこの単板のヤニ部分に100±20g/m2の塗布
量で塗布し、24時間放置した。こののちNa2CO3
の1%水溶液に60±2℃、3時間の条件でこの単
板を浸漬することにより脱脂処理を行なつた。こ
のように脱脂処理を行なつた単板の横引張強度は
9.4Kg/cm2で、従来例の8.7Kg/cm2(第1表参照)
より強度が向上しているものであつた。次でこの
単板をNa2Si3O70.4%、MgSO4・7H2O0.04%、
NaOH0.15%、H2O21.8%(初期濃度)の水溶液
で60±3℃、1〜3時間の処理条件にて脱色処理
を行なつた。この単板を95±2℃の熱水中で30秒
間湯洗処理したのち、A289(スミノール ミリン
グ ブラウン 3G;住友化学)の0.1%水溶液で
調製した染色液に95±2℃、1〜3時間の処理条
件で単板を浸漬して染色処理した。このように染
色処理した単板を乾燥したのちに、接着剤を介し
て多数枚積層して圧締することにより集成フリツ
チを作成し、この集成フリツチを積層面と交差す
る面でスライスすることにより突板用の化粧単板
を得た。 実施例 2 アルカリ溶液としてNa2CO3の10%水溶液のか
わりに、水:メタノール=2:1を溶媒とする
Na2CO3の1%溶液を用いるようにした他は、実
施例1と同様にした。 実施例 3 アルカリ溶液としてNa2CO3の10%水溶液のか
わりに、NaOHの5%水溶液を用いるようにし
た他は、実施例1と同様にした。 実施例 4 アルカリ溶液としてNa2CO3の10%水溶液のか
わりに、溶媒をメタノールとするNaOHの5%
溶液を用いるようにした他は、実施例1と同様に
した。 従来例 1.0mm厚のアガチス素材単板を定寸にカツトし
たのち、Na2CO3の1%水溶液に95±2℃、1時
間の条件でこの単板を浸漬することにより脱脂処
理を行なつた。次でこの単板をNa2Si3O70.4%、
MgSO4・7H2O0.04%、NaOH0.25%、H2O21.8
%(初期濃度)の水溶液で60±5℃、1〜3時間
の処理条件にて脱色処理を行ない、以下は実施例
1と同様にした。 〈比較例 1〉 1.0mm厚のアガチス素材単板を定寸にカツトし
たのち、Na2CO3の1%水溶液に60±2℃、3時
間の条件でこの単板を浸漬することにより脱脂処
理を行なつた。次でこの単板をNa2Si3O70.4%、
MgSO4・7H2O0.04%、NaOH0.15%、H2O21.8
%(初期濃度)の水溶液で60±3℃、1〜3時間
の条件にて脱色処理を行ない、以下は実施例1と
同様にした。 〈比較例 2〉 1.0mm厚のアガチス素材単板を定寸にカツトし
たのち、NaOHの0.4%水溶液に60±2℃、3時
間の条件でこの単板を浸漬することにより脱脂処
理を行なつた。次でこの単板をNa2Si3O70.4%、
MgSO4・7H2O0.04%、NaOH0.15%、H2O21.8
%(初期濃度)の水溶液で60±3℃、1〜3時間
の条件にて脱色処理を行ない、以下は実施例1と
同様にした。 <比較例3> 1.0mm厚のアガチス素材単板を定寸にカツトし
たのち、アルカリ溶液としてNa2CO3の10%水溶
液をこの単板のヤニ部分に100±20g/m2の塗布
量で塗布し、24時間放置した。こののちNa2CO3
の1%水溶液に95±2℃、1時間の条件でこの単
板を浸漬することにより脱脂処理を行なつた。次
でこの単板をNa2Si3O70.4%、MgSO4
7H2O0.04%、NaOH0.25%、H2O21.8%(初期濃
度)の水溶液で60±3℃、1〜3時間の条件にて
脱色処理を行ない、以下は実施例1と同様にし
た。 〈比較例 4〉 アルカリ溶液としてNa2CO3の10%水溶液のか
わりに、水:メタノール=2:1を溶媒とする
Na2CO3の1%溶液を用いるようにした他は、比
較例3と同様にした。 〈比較例 5〉 アルカリ溶液としてNa2CO3の10%水溶液のか
わりに、NaOHの5%水溶液を用いるようにし
た他は、比較例3と同様にした。 〈比較例 6〉 アルカリ溶液としてNa2CO3の10%水溶液のか
わりに、溶媒をメタノールとするNaOHの5%
溶液を用いるようにした他は、比較例3と同様に
した。 上記実施例、従来例、比較例における脱脂処理
板の脱ヤニ効果を第2表に示す。第2表中「○」
は完全除去、「△」はヤニ分の色が薄くなる、
「×」は未除去を示す。
[Table] In the present invention, since the degreasing treatment is carried out at such a relatively low temperature, the treatment time can be extended to about 5 hours. Therefore, sufficient time is allowed for the degreasing process, and it becomes possible to remove the hard tar components. However, simply immersing wood in a degreasing solution as described above may not be sufficient to remove thick tar. For this reason, in the present invention, an alkaline solution is applied in advance to the tarred portion of the essential veneer, and this is subjected to the degreasing treatment. As the alkaline solution to be applied, for example, a 1 to 10% aqueous solution of Na 2 CO 3 or NaOH can be used, and after applying this alkaline solution,
It is preferable to leave it for about 3 days and nights so that the alkaline solution can sufficiently act on the tar. By pre-applying an alkaline solution to the tar area and performing the degreasing treatment in this manner, it is possible to remove the thick tar component, and it is possible to sufficiently remove the tar. After degreasing in this way, if a wooden veneer is used as the wood, for example, Na 2 Si 3 O 7 0.4
%, MgSO47H2O0.04 %, NaOH0.15%,
Decolorization is performed by immersing the decolorizing solution in a decolorizing solution containing 1.5 to 2.5% H 2 O 2 (initial concentration) at 60±5℃ for 1 to 3 hours, and then at 95±2℃. The wood veneer is washed in hot water for about 30 seconds, then dyed and dried.The wood veneer is then used to form a laminated fritsch, and the laminated fritsch is sliced. An artificial decorative veneer for veneer is obtained. It has been confirmed that if decolorization is performed after degreasing under the above conditions, the degree of decolorization per decolorization time can be improved and the decolorization time can be shortened. Since the degreasing process is carried out at a relatively low temperature, the amount of energy required to heat the degreasing solution can be reduced (about 2/3 that of conventional methods). Next, the present invention will be specifically explained using conventional examples, working examples, and comparative examples. Example 1 After cutting a 1.0 mm thick agathis material veneer to a specified size, a 10% aqueous solution of Na 2 CO 3 was applied as an alkaline solution to the resin part of the veneer in an amount of 100±20 g/m 2 . , left for 24 hours. After this Na 2 CO 3
The veneer was degreased by immersing it in a 1% aqueous solution at 60±2°C for 3 hours. The lateral tensile strength of the veneer that has been degreased in this way is
9.4Kg/cm 2 compared to 8.7Kg/cm 2 of the conventional example (see Table 1)
The strength was further improved. Next, this veneer was treated with Na 2 Si 3 O 7 0.4%, MgSO 4 7H 2 O 0.04%,
Decolorization treatment was performed using an aqueous solution of 0.15% NaOH and 1.8% H 2 O 2 (initial concentration) at 60±3° C. for 1 to 3 hours. After washing this veneer in hot water at 95±2℃ for 30 seconds, it was immersed in a staining solution prepared with a 0.1% aqueous solution of A289 (Sminol Milling Brown 3G; Sumitomo Chemical) at 95±2℃ for 1 to 3 hours. The veneer was immersed and dyed under the following treatment conditions. After drying the dyed veneers, a composite frit is created by laminating and pressing a large number of veneers with adhesive, and by slicing this composite frit on a plane that intersects with the laminated surface. A decorative veneer for veneer was obtained. Example 2 Using water:methanol=2:1 as the solvent instead of a 10% aqueous solution of Na 2 CO 3 as the alkaline solution
The same procedure as in Example 1 was carried out except that a 1% solution of Na 2 CO 3 was used. Example 3 The same procedure as in Example 1 was carried out, except that a 5% aqueous solution of NaOH was used instead of a 10% aqueous solution of Na 2 CO 3 as the alkaline solution. Example 4 Instead of a 10% aqueous solution of Na 2 CO 3 as the alkaline solution, 5% of NaOH with methanol as the solvent
The same procedure as in Example 1 was carried out except that a solution was used. Conventional example: After cutting a 1.0 mm thick agathis material veneer to a specified size, the veneer is degreased by immersing it in a 1% aqueous solution of Na 2 CO 3 at 95±2°C for 1 hour. Ta. Next, this veneer was treated with Na 2 Si 3 O 7 0.4%,
MgSO47H2O0.04 %, NaOH0.25%, H2O2 1.8
% (initial concentration) under the treatment conditions of 60±5° C. for 1 to 3 hours, and the following procedure was the same as in Example 1. <Comparative Example 1> After cutting a 1.0 mm thick agathis material veneer to a specified size, the veneer was degreased by immersing it in a 1% aqueous solution of Na 2 CO 3 at 60±2°C for 3 hours. I did this. Next, this veneer was treated with Na 2 Si 3 O 7 0.4%,
MgSO47H2O0.04 %, NaOH0.15%, H2O2 1.8
% (initial concentration) at 60±3° C. for 1 to 3 hours, and the following procedure was the same as in Example 1. <Comparative Example 2> A 1.0 mm thick agathis material veneer was cut to size and then degreased by immersing the veneer in a 0.4% NaOH aqueous solution at 60±2°C for 3 hours. Ta. Next, this veneer was treated with Na 2 Si 3 O 7 0.4%,
MgSO47H2O0.04 %, NaOH0.15%, H2O2 1.8
% (initial concentration) at 60±3° C. for 1 to 3 hours, and the following procedure was the same as in Example 1. <Comparative Example 3> After cutting a 1.0 mm thick agathis material veneer to a specified size, a 10% aqueous solution of Na 2 CO 3 was applied as an alkaline solution to the resinous part of the veneer in an amount of 100±20 g/m 2 . It was applied and left for 24 hours. After this Na 2 CO 3
The veneer was degreased by immersing it in a 1% aqueous solution of 1% at 95±2°C for 1 hour. Next, this veneer was treated with Na 2 Si 3 O 7 0.4%, MgSO 4 .
Decolorization treatment was performed with an aqueous solution of 7H 2 O 0.04%, NaOH 0.25%, H 2 O 2 1.8% (initial concentration) at 60 ± 3 ° C. for 1 to 3 hours, and the following was the same as in Example 1. I made it. <Comparative Example 4> Instead of a 10% aqueous solution of Na 2 CO 3 as the alkaline solution, water:methanol = 2:1 was used as the solvent.
The same procedure as Comparative Example 3 was carried out except that a 1% solution of Na 2 CO 3 was used. <Comparative Example 5> Comparative Example 3 was carried out in the same manner as in Comparative Example 3, except that a 5% aqueous solution of NaOH was used instead of a 10% aqueous solution of Na 2 CO 3 as the alkaline solution. <Comparative Example 6> Instead of a 10% aqueous solution of Na 2 CO 3 as an alkaline solution, 5% NaOH using methanol as the solvent
The same procedure as Comparative Example 3 was carried out except that a solution was used. Table 2 shows the detaning effects of the degreased plates in the above Examples, Conventional Examples, and Comparative Examples. “○” in Table 2
``△'' means complete removal, ``△'' means the color of the tar becomes lighter.
"x" indicates not removed.

【表】【table】

Claims (1)

【特許請求の範囲】[Claims] 1 木材のヤニ部分にアルカリ溶液を予め塗布
し、次いでこの木材を60±5℃に加温した脱脂溶
液中で処理することを特徴とする木材の脱脂処理
法。
1. A method for degreasing wood, which is characterized in that an alkaline solution is applied in advance to the resinous part of the wood, and then the wood is treated in a degreasing solution heated to 60±5°C.
JP19138282A 1982-10-30 1982-10-30 Method of degreasing and treating wood Granted JPS5979718A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19138282A JPS5979718A (en) 1982-10-30 1982-10-30 Method of degreasing and treating wood

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19138282A JPS5979718A (en) 1982-10-30 1982-10-30 Method of degreasing and treating wood

Publications (2)

Publication Number Publication Date
JPS5979718A JPS5979718A (en) 1984-05-09
JPH0362524B2 true JPH0362524B2 (en) 1991-09-26

Family

ID=16273659

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19138282A Granted JPS5979718A (en) 1982-10-30 1982-10-30 Method of degreasing and treating wood

Country Status (1)

Country Link
JP (1) JPS5979718A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6112302A (en) * 1984-06-28 1986-01-20 佐野木材株式会社 Method of preventing exudation of resin from wood
JP3512495B2 (en) * 1994-12-05 2004-03-29 中国塗料株式会社 Treatment agent for wood containing tar, method for treating wood containing tar using the treating agent, and use of wood treated by the method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5312401A (en) * 1976-07-20 1978-02-03 Daicel Ltd Method of treating woods
JPS5441306A (en) * 1977-09-05 1979-04-02 Yamanashi Prefecture Wood defatting method

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5312401A (en) * 1976-07-20 1978-02-03 Daicel Ltd Method of treating woods
JPS5441306A (en) * 1977-09-05 1979-04-02 Yamanashi Prefecture Wood defatting method

Also Published As

Publication number Publication date
JPS5979718A (en) 1984-05-09

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