JP2743125B2 - Cork anti-fading agent and cork - Google Patents
Cork anti-fading agent and corkInfo
- Publication number
- JP2743125B2 JP2743125B2 JP3228151A JP22815191A JP2743125B2 JP 2743125 B2 JP2743125 B2 JP 2743125B2 JP 3228151 A JP3228151 A JP 3228151A JP 22815191 A JP22815191 A JP 22815191A JP 2743125 B2 JP2743125 B2 JP 2743125B2
- Authority
- JP
- Japan
- Prior art keywords
- cork
- fading
- cork material
- discoloration
- thiourea
- 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 - Fee Related
Links
Landscapes
- Chemical And Physical Treatments For Wood And The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コルク材の経時変化に
よる退色を防止する変退色防止剤に関し、具体的には紫
外線によるコルク材表面の変退色を防止せしめるコルク
材退色防止剤とコルク材に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-fading agent for preventing discoloration of cork material due to aging, and more particularly, to a cork anti-fading agent for preventing discoloration of cork material surface due to ultraviolet rays, and a cork material. About.
【０００２】[0002]
【従来の技術】コルク材は地中海沿岸地方で栽培される
ブナ科の常緑樹・コルク樫の樹皮であることが知られて
いる。一般的に木材は長時間太陽光に曝すと変色が生じ
るものであり、樹木の木材が黒色あるいは黄色に「やけ
変色」するのに対し、樹皮であるコルク材は白色に「さ
める変色」を生じる。このコルク材の変色は、コルクが
酸素を媒介として紫外線可視光線を吸収して高いエネル
ギーを持ち、二重結合や三重結合などをもって発色及び
退色団となり易いＣ＝Ｃ，Ｃ＝０原子団などが分散され
たり開裂されたりすることに起因すると考えられる。2. Description of the Related Art Cork is known to be the bark of evergreen and cork oaks of the family Fagaceae cultivated in the Mediterranean coastal region. In general, wood is discolored when exposed to sunlight for a long period of time, and the wood of trees "discolors" to black or yellow, whereas the bark, corkwood, "discolors" to white. . The discoloration of this cork material is as follows: cork absorbs ultraviolet and visible light rays through oxygen, has high energy, and has C = C, C = 0 atomic groups and the like which are liable to form a color and a bleaching group through double bonds or triple bonds. It is thought to be due to dispersal and cleavage.
【０００３】[0003]
【発明が解決しようとする課題】この変色を防ぐため
に、一つの解決策としてコルク表面を着色し太陽光を遮
る方法が採られるが、この方法では表面を濃く着色しな
ければその効果は薄く、該濃く塗ればコルク材の保有す
る風味あるいは機能まで損なう別の不具合が発生しす
る。この方法で一般的に用いられているものとしては、
ウレタン塗装をコルク材表面に施すことが知られてい
る。しかし、このウレタン塗装も前記のように薄色の着
色では有効な退色防止剤になり得ず、半ばコルク材の退
色は防止することの不可能なものと諦められている。本
発明はこのような欠点に鑑み、紫外線、可視光線等の太
陽光によるコルク材の経時影響を遮断して変退色を防ぐ
変退色防止剤とコルク材を提供することを目的としてい
る。In order to prevent this discoloration, a method of coloring the cork surface and blocking sunlight is adopted as one solution. However, in this method, the effect is thin unless the surface is colored deeply. If it is applied darkly, another problem occurs that impairs the flavor or function possessed by the cork material. Commonly used in this method are:
It is known to apply urethane coating to cork material surfaces. However, this urethane coating cannot be an effective anti-fading agent in the case of light coloration as described above, and it is given up that it is impossible to prevent the fading of the cork material in the middle. The present invention has been made in view of the above-described drawbacks, and has as its object to provide a discoloration preventing agent and a cork material that prevent the discoloration and fading of the cork material by blocking the influence of sunlight such as ultraviolet rays and visible light over time.
【０００４】[0004]
【課題を解決するための手段】本発明は、コルク材退色
防止剤であって、有機酸のクエン酸と環元剤の チオ尿素
を組合せて調整し、これらを水あるいはアルコール水ま
たはアル コールに溶解せしめたことを特徴としている。SUMMARY OF THE INVENTION The present invention relates to an anti-fading agent for cork material , comprising citric acid as an organic acid and thiourea as a reducing agent.
And adjust them, and remove them with water or alcoholic water.
Other is characterized in that by dissolving the alcohol.
【０００５】コルク材の型成においては、前記コルク材
退色防止剤を接着剤と共にコルク粒中に投入し、これを
型枠に充填型成せしめて、内部まで退色しないコルク材
を形成する。 In forming a cork material, the above-mentioned cork material fading preventing agent is put into a cork grain together with an adhesive, and the cork material is filled in a mold to form a cork material which does not fade to the inside .
【０００６】[0006]
【実施例】下記実験方法にて本発明の実験を行い評価し
た。 処理方法−コルクシート材に薬剤を常温３０分浸漬処理
しその後風乾． 性能評価−ＪＩＳ Ｌ ０８４２ カーボンアーク灯光
試験（２０ｈ） 実験結果及び考察 アルカリの耐光性に与える影響について検討を加え、ア
ルカリ性が強いほど「アルカリ焼け」と云われる変色が
起き、弱酸性が変色防止効果が高いことに着目し、この
種の弱酸性各種酸類を上記実験にて比較検討したとこ
ろ、酒石酸、クエン酸、フィチン酸、リンゴ酸、タンニ
ン酸などが退色防止作用が有ることか確認された。EXAMPLES The experiments of the present invention were evaluated by the following experimental methods. Treatment method-The chemical was immersed in a cork sheet at room temperature for 30 minutes, and then air-dried. Performance evaluation-JIS L 0842 Carbon arc lamp light test (20h) Experimental results and considerations The effect of alkali on light resistance was examined, and the more alkaline, the more discoloration called "alkaline burning" occurred, and the weak acidity prevented discoloration. By focusing on the fact that the acidity is high, various kinds of weakly acidic acids of this kind were compared and examined in the above experiment, and it was confirmed that tartaric acid, citric acid, phytic acid, malic acid, tannic acid, and the like have an effect of preventing fading.
【０００７】次に、還元剤を中心に各種化合物を用いて
その効果について調査検討した。還元剤として、亜硫酸
ナトリウム、尿素、チオ尿素、二酸化チオ尿素が 考えら
れた。この中で、亜鉛酸ナトリウム、尿素、チオ尿素、
二酸化チオ尿素の全てに効果が認められたが、中でもチ
オ尿素の効果が大きかった。Next, the effects of various compounds, mainly reducing agents, were investigated. Sulfurous acid as reducing agent
Sodium, urea, thiourea, considered thiourea dioxide
Was. Among them, sodium zincate, urea, thiourea,
The effect was observed for all of thiourea dioxide, and the effect of thiourea was particularly large.
【０００８】そこで、次に各種酸と上記物質の複合効果
について調査した。酸ではクエン酸を、環元剤としては
チオ尿素をそれぞれ混合した後、コルクシート材に塗布
処理し紫外線照射を行った。その結果、クエン酸−チオ
尿素混合系で最も著しい効果が認められた。まとめコル
クシート材の紫外線照射による変退色を防止するため各
種薬剤を用いてその効果を調べた。その結果、クエン酸
を中心とする弱有機酸とチオ尿素の混合系で著しい効果
が認められた。この処理法は外観を損なわず、作業性が
容易で、原料シートの炭化度に応じて配合量を変化させ
ることが出来ると云う利点があり、現在実用化するめど
が付いたところである。[0008] Then, the composite effect of various acids and the above substances was investigated next. The acid is citric acid and the reducing agent is
After each thiourea was mixed, it was applied to a cork sheet material and irradiated with ultraviolet light. As a result, the most remarkable effect was observed in the citric acid-thiourea mixed system. Summary In order to prevent discoloration and discoloration of cork sheet material due to ultraviolet irradiation, the effect was investigated using various chemicals. As a result, a remarkable effect was observed in a mixed system of thiourea and a weak organic acid mainly composed of citric acid. This treatment does not impair the appearance, easy workability, there is advantage that that it is possible to change the amount depending on the carbonization of the material sheet, it was with prospect currently practical.
【０００９】[0009]
【発明の効果】上記のように本発明は、コルク材の物性
及び天然材が持つ良好な外観を一切損なうことなく変退
色防止をなさしめることに成功した。特に、焼き処理し
た炭化コルク材は退色（白色）が著しいが、これに対し
て顕著な退色防止効果を見せる。また、本発明のコルク
材退色防止剤の塗布作業性は極めて良好であり、コルク
材に混合した場合では内部全体から退色防止をなすこと
が出来るので、摩耗あるいは切削加工において有利な材
料を提供できる。As described above, the present invention has succeeded in preventing discoloration and fading without impairing the physical properties of the cork material and the good appearance of the natural material at all. In particular, the carbonized cork material which has been baked has a remarkable fading (white color), but exhibits a remarkable fading preventing effect. Further, the application workability of the cork material anti-fading agent of the present invention is extremely good, and when mixed with cork material, it is possible to prevent fading from the entire inside, so that it is possible to provide a material which is advantageous in abrasion or cutting. .
Claims (2)
し、これらを水 あるいはアルコール水またはアルコール
に溶解せしめたことを特徴とするコルク材退色防止剤。(1) Combination of citric acid and thiourea
Water or alcohol water or alcohol
An anti-fading agent for cork material, characterized by being dissolved in water.
コルク粒中に投入しこれを型枠に充填せしめて型成した
ことを特徴とするコルク材。2. A cork material characterized in that the cork material fading preventing agent is put into a cork particle together with an adhesive, and this is filled in a mold to form a cork material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3228151A JP2743125B2 (en) | 1991-05-29 | 1991-05-29 | Cork anti-fading agent and cork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3228151A JP2743125B2 (en) | 1991-05-29 | 1991-05-29 | Cork anti-fading agent and cork |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04351501A JPH04351501A (en) | 1992-12-07 |
| JP2743125B2 true JP2743125B2 (en) | 1998-04-22 |
Family
ID=16872028
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3228151A Expired - Fee Related JP2743125B2 (en) | 1991-05-29 | 1991-05-29 | Cork anti-fading agent and cork |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2743125B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030077913A (en) * | 2002-03-26 | 2003-10-04 | 학교법인 동의학원 | Colored wood made from wood and organic acid |
| JP6009785B2 (en) * | 2012-03-14 | 2016-10-19 | 永大産業株式会社 | Light-resistant wood and method for producing the same |
| CN105034110A (en) * | 2015-06-10 | 2015-11-11 | 马魁 | Corn-husk treating agent |
| CN111571749A (en) * | 2020-05-25 | 2020-08-25 | 安徽持家汉家居工艺品有限公司 | Flame-retardant treatment method for wicker handicraft |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57125002A (en) * | 1981-01-26 | 1982-08-04 | Uchiyama Mfg | Cork for bottle stopper inhibiting blackening generated through iron tannate reaction |
| JPH01123670A (en) * | 1987-11-06 | 1989-05-16 | Dantani Plywood Co Ltd | Production of decorative sheet |
-
1991
- 1991-05-29 JP JP3228151A patent/JP2743125B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04351501A (en) | 1992-12-07 |
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