JP2000334708A - Method for removing bamboo oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To sufficiently remove oil from the surface of a natural green bamboo rapidly and to such an extent that the oil is removed even from the fine parts of the bamboo without losing its rigidity and strength, in the process of treating the bamboo for preventing its color from being faded or coloring it. SOLUTION: An aqueous basic solution prepared by adding 0.01-1 wt.% basic compound and 0.01-1 wt.% surfactant, is heated at about 70-100 deg.C. Next a bamboo is soaked in the aqueous basic solution to remove oil from the bamboo.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for removing an oil component coating a bamboo skin surface.

[0002]

2. Description of the Related Art The freshness and emotions of bamboo are favored by a wide range of people, and bamboo is widely used in home interiors and furniture, accessories and outdoor fences. However, since the fading and deterioration of the bamboo material starts immediately after cutting, processing the bamboo as it is cut has problems with the quality or life of the product, and in many cases, the fading prevention treatment, coloring, and maintaining or strengthening the rigidity Processing has been performed. As a result, products using natural bamboo materials are given high prices, and imitation bamboo made of synthetic resin, which has high durability and low price, is mainly used.

In recent years, in addition to the above-mentioned applications, plants such as houseplants have been installed from stores to homes. In order to produce Japanese architecture and Japanese-style interior decoration, they are used for display as interior decorations. Aotake's needs are expanding.
Since bamboo is difficult to grow as an affordable potted plant due to its vegetative properties unlike ordinary plants, most of such bamboo for display is imitation bamboo. Although it is relatively easy to manufacture synthetic resin imitation bamboo used for construction and construction materials as described above, such imitation bamboo for displays includes knots and branches of actual bamboo. Because it is required to reproduce even the details such as the details and the subtle texture, molding with synthetic resin is difficult,
Generally, natural green bamboo treated to prevent fading is used.

[0004] When a natural green bamboo is subjected to surface treatment such as prevention of fading, coloring and coating, the surface of the bamboo skin is first coated in order to sufficiently infiltrate the respective treatment liquid into the bamboo skin surface. It is necessary to perform an oil removal process for removing wax components and the like.

[0005] As a method of the oil removal treatment, a method of physically removing the surface of bamboo skin by sanding with sandpaper or the like, a method of dipping the bamboo skin in a basic solution, and the like are generally known. However, in the above method, although the bamboo diameter is large and can be used for a straight bamboo, the small bamboo used for the display has a small diameter. Therefore, there is a problem in that the processing solution of the next stage cannot sufficiently penetrate, and a satisfactory quality and texture cannot be obtained.

Further, when green bamboo is immersed in the treatment liquid for a long time to sufficiently remove oil, not only the elution of the oil component on the surface of the bamboo skin, but also the fiber structure of the bamboo due to the component contained in the treatment liquid or the added heat. And other problems such as a decrease in rigidity and strength of the bamboo material and a cause of breaking the bamboo when dried.

[0007]

SUMMARY OF THE INVENTION The present invention provides a method for quickly and finely removing natural green bamboo from the surface of the green bamboo in the course of performing a treatment for preventing fading or coloring, without losing the rigidity or strength of the green bamboo. It is an object to be able to sufficiently drain the oil to the part.

[0008]

Means for Solving the Problems * 1 The technical means of the present invention for solving the above-mentioned problems is that "a basic compound is contained in an amount of 0.01 to 1% by weight and a surfactant is contained in an amount of 0.01% by weight.
The basic aqueous solution prepared so as to be contained at 1 to 1% by weight is heated to about 70 to 100 ° C., and bamboo is immersed in the basic aqueous solution for treatment ”. Here, as the basic compound contained in the basic aqueous solution, sodium hydroxide or potassium hydroxide can be used.

The above technical means works as follows. According to the above-mentioned means, the ability of the bamboo skin surface for oil removal is improved. This is because a bamboo is treated by heating a treatment solution prepared to contain a basic compound that removes oil components from the surface of the bamboo skin and a surfactant. It is thought that the desorption reaction of the oil component from the bamboo skin is enhanced by the activation of the interface between the bamboo skin surface and the oil component by the surfactant and the heat, and as a result, the ability of the oil removal treatment of the bamboo skin surface Is thought to rise.

[0010]

According to the present invention having the above configuration, the following specific effects are obtained. Since the ability of the surface of the bamboo bar for oil removal is improved, the processing efficiency is increased, and the time for immersion in the processing solution is short. Therefore, the bamboo fiber is not broken by the treatment liquid, and the rigidity and strength of the bamboo are not lost. In addition, oil components in fine parts such as bamboo nodes and branches can be removed. [Others] * 2. In Item 1 or 2, by "containing sodium hydroxide or potassium hydroxide at 0.01 to 0.1% by weight", sodium hydroxide or potassium hydroxide is added at 0.1%.
By containing at 0.1 to 0.1% by weight, the remaining of the basic compound on the bamboo or the destruction of the bamboo fiber structure by the basic compound is reduced, and operations such as dyeing and surface treatment after oil removal processing are performed. In the process, bamboo is hard to break. * 3. In paragraph 1 or 2 above, the interface between the surface of the bamboo skin and the oil component is obtained by adding stirring by ultrasonic vibration by "adding stirring by ultrasonic vibration when bamboo is immersed." Further activation, the time for immersing the bamboo in the treatment liquid is reduced, and the oil removal processing is performed more quickly.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the bamboo oil removing method of the present invention will be described. Since bamboo fiber tissue shows resistance to basicity, there are many cases where a basic treatment solution is used to desorb the oil component from the surface of bamboo skin, and as a basic compound, its price and availability and Sodium hydroxide is generally used because of its easy handling, and sodium hydroxide is used as a basic compound in the examples of the present invention. The basic compound used in the treatment liquid is 0.01 to
It is prepared so as to contain 1% by weight, preferably 0.01% to 0.1%, most preferably 0.02 to 0.1%.
It is preferable that the composition be prepared so as to be contained at 05% by weight.

The surfactant used in the treatment solution may be any one that exhibits a surfactant activity in a basic solution, but preferably exhibits a high surfactant activity in a temperature range of 70 to 100 ° C. . Also, the surfactant is
It is prepared so as to contain 0.01 to 1% by weight, preferably 0.01 to 0.1% by weight, most preferably 0.1 to 0.1% by weight.
What is prepared so that it may be contained at 05%-0.1% is good.

When the bamboo is immersed, the temperature of the processing solution is 7
0-100 ° C., preferably 90-100 ° C.
° C, most preferably from 98 to 100 ° C. Since the treatment liquid is heated to maintain the treatment temperature, gentle convection occurs in the treatment liquid, and particularly, the oil on the bamboo skin surface does not need to be stirred or the treatment tank is shaken. Components are eliminated. When stirring by ultrasonic waves or the like is performed during the treatment, the elimination reaction is promoted, so that the treatment time is shortened.

The bamboo to be treated by the method of the present invention is desirably three days or less from the bamboo forest. It is possible to process bamboo more than 4 days after cutting,
The rate of occurrence of inconvenience such as cracking in various working steps such as dyeing and surface processing performed continuously after the oil removal treatment of the present invention increases.

Next, the embodiment of the present invention will be described in detail. (Example 1) For green bamboo of 3 to 9 cm in diameter cut out from bamboo grove, bamboo leaves and unnecessary twigs were removed, and the total length was 3
The length of the bamboo is trimmed so as to be 00 to 400 cm, washed with water to remove foreign substances and dirt attached to the surface of the green bamboo, and dried.

A processing tank having a rectangular parallelepiped shape (length 30 cm × width 450 cm × height 30 cm) is filled with 0.2 to 0.25 g / L.
Sodium hydroxide, 0.5 g / L surfactant (Sa
A processing liquid (about 200 L) prepared to be ndozinNIT 286%: Clariant Japan Co., Ltd. is prepared, and the processing liquid is heated to 98 ° C. by a heating device disposed at the bottom of the processing tank. 10 to 30 green bamboos are immersed in this processing solution, and the processing is performed for 10 to 20 minutes while maintaining the temperature of the processing liquid at 98 ° C., so that the oil component on the bamboo surface is eluted into the processing liquid.

After the bamboo is taken out of the processing tank, the processing liquid and the wax component adhering to the surface are completely washed off by washing with water, and the bamboo is exposed to the sun for 20 to 30 days to be dried. 10 to 30 bleached bamboo with oil component removed,
0.2 g / L Kayacryl Yellow 3RL (Hodogaya Chemical Industry Co., Ltd.), 0.3 g / L Cation Orange RLH20
0% (Hodogaya Chemical Industry Co., Ltd.), 0.1 g / L Eisen Malachito Green (Hodogaya Chemical Industry Co., Ltd.), three kinds of basic dyes, 1.0 g / L 80% acetic acid, 0.5 g / L interface It is prepared by containing an activator (Sandozin NIT286%: Clariant Japan) and is immersed in a dye solution (about 250 L) heated to 90 ° C. for 10 minutes to dye.

After the bamboo taken out of the dyeing solution is washed away, the bamboo is immersed in hot water at 80 ° C. for 20 minutes to fix the color, and then washed with water and dried. The dyed bamboo is
A transparent urethane resin is applied to the surface. When used as an imitation bamboo for a display, bamboo leaves or the like made of synthetic resin are attached to the branches of the bamboo. Example 2 Bamboo pretreated in the same manner as in Example 1
2 to 0.25 g / L sodium hydroxide, 0.5 g / L
A treatment solution (about 200 L) prepared to be a surfactant (Sandozin NIT 286%: Clariant Japan) and heated to 98 ° C. was prepared.
30 pieces are immersed in the processing liquid in the processing tank, and the processing is performed for 2 to 3 minutes while maintaining the temperature of the processing liquid at 98 to 100 ° C.

The green bamboo is taken out of the processing solution, washed with water and dried, and then the surface of the bamboo skin is polished and smoothed by sandblasting. The polished bamboo is immersed in a processing solution prepared to contain 2% by weight of copper acetate and heated to 98 ° C., while maintaining the temperature of the processing solution at 98 ° C.
Treat for 0 to 20 minutes to dye the bamboo surface. It is taken out of the treatment liquid, washed with water, shaded and dried, and used by applying a transparent urethane resin to the surface as in Example 1. Example 3 Bamboo pretreated in the same manner as in Example 1 was heated to 90 ° C. by treating a treatment solution prepared in the same manner as in Example 2 above.
The bamboo is immersed to maintain the temperature of the processing liquid at about 90 ° C., and the processing liquid is subjected to ultrasonic vibration for 5 to 10 minutes. After being removed from the processing solution, the same processing as in Example 1 is performed.

Claims (4)

[Claims] 1. A basic aqueous solution prepared so as to contain 0.01 to 1% by weight of a basic compound and 0.01 to 1% by weight of a surfactant is heated to about 70 to 100 ° C.,
A bamboo oil removal method in which bamboo is immersed in this basic aqueous solution for treatment. 2. The bamboo oil removing method according to claim 1, wherein the basic compound contained in the basic aqueous solution is sodium hydroxide or potassium hydroxide. 3. The method for draining bamboo oil according to claim 2, comprising 0.01 to 0.1% by weight of sodium hydroxide or potassium hydroxide. 4. The bamboo oil draining method according to claim 1, wherein the bamboo is immersed by stirring with ultrasonic vibration.