阅读说明：本技术 一种棕榈藤生材金属着色新方法 (Novel metal coloring method for palm rattan raw material ) 是由 汪佑宏 何伟 张利萍 刘亚梅 朱莹琦 石传喜 于 2019-11-01 设计创作，主要内容包括：本发明公开了一种棕榈藤生材金属着色新方法,木材加工技术领域,该方法将熔点为70℃锡铋镉铅合金放入容器中加热至水的沸点(100℃)使其呈熔融状态,再将新采收的棕榈藤生材从节间截断成一定规格后放入容器中,并用一重物压没在熔融合金液面下。由于棕榈藤生材中的液态水分气化及空气受热迅速膨胀而排出藤材,致使藤材内部产生真空负压,将熔融合金吸入棕榈藤材、置换掉其内部的液态水分和空气,冷却后获得金属着色的棕榈藤材。与未着色的棕榈藤素材相比,本发明所述方法获得的金属着色的棕榈藤材,其明度变暗、颜色有红黄色变蓝绿色,色饱和度减小,色调角度值增大,总色差非常大,着色前后呈现出两种完全不同的颜色；同时省去了棕榈藤生材干燥过程而节省能量,而且因及时、隔绝空气干燥,减少了棕榈藤在干燥过程中的不均匀、不可控的酶变色、热变色等,丰富了棕榈藤材的材色、提高了棕榈藤材及相关产品的附加值。(The invention discloses a new method for coloring palm rattan raw material metal, which belongs to the technical field of wood processing, and is characterized in that a tin-bismuth-cadmium-lead alloy with the melting point of 70 ℃ is placed in a container and heated to the boiling point (100 ℃) of water to enable the raw material to be in a molten state, then the newly-collected palm rattan raw material is cut into a certain specification from internodes and placed in the container, and a weight is pressed under the liquid level of the molten alloy. The liquid water in the palm rattan raw material is gasified and the air is heated to rapidly expand to be discharged out of the rattan material, so that vacuum negative pressure is generated in the rattan material, the molten alloy is absorbed into the palm rattan material, the liquid water and the air in the palm rattan material are replaced, and the palm rattan material with metal coloring is obtained after cooling. Compared with the uncolored palm rattan material, the metal colored palm rattan material obtained by the method has the advantages that the lightness is dark, the color is changed from red to yellow to blue and green, the color saturation is reduced, the hue angle value is increased, the total color difference is very large, and two completely different colors are presented before and after coloring; meanwhile, the drying process of the palm rattan raw material is omitted, so that energy is saved, uneven and uncontrollable enzyme discoloration, thermal discoloration and the like of the palm rattan in the drying process are reduced due to timely and isolated air drying, the material color of the palm rattan is enriched, and the additional value of the palm rattan and related products is improved.)

1. A novel palm rattan raw material metal coloring method is characterized by comprising the following steps:

step 1, hot bath replacement

Firstly, putting a tin-bismuth-cadmium-lead alloy with the melting point of 70 ℃ into a container, heating to the boiling point (100 ℃) of water to enable the tin-bismuth-cadmium-lead alloy to be in a molten state, cutting a newly-collected palm rattan raw material into a certain specification from internodes, putting the palm rattan raw material into the container filled with the molten alloy, and pressing the palm rattan raw material to be submerged below the liquid level of the molten alloy by using a weight;

due to the heating of the molten alloy, liquid moisture in the palm rattan raw material is gasified and air is heated to rapidly expand to be discharged out of the rattan material, so that vacuum negative pressure is generated in the rattan material, the molten alloy is sucked into the palm rattan material, and the liquid moisture and the air in the palm rattan material are replaced;

step 2, obtaining finished products

Taking out the sample after the constant weight is reached, wiping the surface of the sample before the molten alloy is solidified, putting the sample into a dryer, and cooling to obtain a palm rattan material with metal coloring;

step 3, color detection

And (3) testing the color of the metal-colored palm rattan material obtained after the treatment in the step (2) by using a color difference meter, and comparing and analyzing the color with the value measured by the unmodified palm rattan material.

2. The new palm vine raw material metal coloring method according to claim 1, characterized in that the palm vine raw material in step 1 is newly harvested palm vine raw material, omitting the drying process of the palm vine raw material; meanwhile, due to timely and isolated air drying, the uneven and uncontrollable enzyme discoloration, thermal discoloration and the like of the palm vines in the drying process are reduced.

3. The new palm vine green material metal coloring method according to claim 1, wherein in step 1, a drying oven is used for heating under normal pressure without vacuum and pressurization equipment, so that liquid moisture in the palm vine green material is gasified and air is rapidly expanded by heating to discharge the vine material, vacuum negative pressure is generated, and moisture and air in the palm vine green material are replaced by molten alloy in a replacement mode.

4. The new method for metal coloring of palm rattan raw material as claimed in claim 1, wherein the metal colored palm rattan material obtained in step 2 has a darker lightness, a reddish yellow color to a bluish green color, a lower saturation, an increased hue angle value, a very large total color difference, and two completely different colors before and after coloring.

Technical Field

The invention relates to a novel process for coloring a palm rattan by using a low-melting-point tin-bismuth-cadmium-lead alloy, belongs to the technical field of wood processing, and particularly relates to a novel method for coloring a palm rattan raw material metal.

Background

Palm rattan is a monocotyledon, belongs to the rattan subfamily of the palmaceae family, is an important, multipurpose and renewable green wood resource in the tropical forest treasure house, and has 13 664 varieties and 93 varieties in the world, wherein 4 varieties and 43 varieties and 26 varieties exist in China.

The rattan of the palm rattan is commonly called rattan, the length of the rattan can reach 170m (even more than 1000 meters), the diameter of the rattan is 3mm-200mm, and the primary color is mainly milky white, beige and the like; the material is flexible, breathable, low in heat conduction and degradable, and is a high-quality material for manufacturing furniture such as tables, chairs, tea tables, sofas, beds and the like, rattan artware, various rattan-woven ornaments and the like; in addition, the rattan products such as rattan furniture and the like have elegant, plain and elegant appearance, are close to nature, and have high practical, ornamental and commercial values.

However, the palm rattan material has limited color types and is not uniform and pure enough in color, so that the processing and utilization of rattan products are severely limited. Before conventional dyeing and coloring, bleaching treatment is required to obtain white and uniform base materials; therefore, not only is the bleaching agent required to be purchased and the treatment time and labor are wasted, the production cost of the rattan product is increased, but also the original excellent physical and mechanical properties of the rattan material are reduced, and the competitiveness of the rattan material in the field of furniture and the manufacture of the rattan product is reduced, which is very unfavorable for the field of processing and utilization of the fragile palm rattan.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a novel metal coloring method for palm rattan raw materials, and aims to solve the inherent defects and technical problems of uneven color, limited material color types, other dyeing and coloring and the like of the palm rattan materials in the processing and using processes of furniture manufacturing, rattan artware, rattan woven ornaments and the like, enrich the material colors and coloring modes of the palm rattan materials, and improve the competitiveness of the rattan materials in the manufacturing fields of furniture, rattan artware, rattan woven ornaments and the like.

The invention is realized by the following technical scheme:

a novel method for coloring palm rattan raw material metal comprises the following steps:

step 1, hot bath replacement

Firstly, putting a tin-bismuth-cadmium-lead alloy with the melting point of 70 ℃ into a container, heating to the boiling point (100 ℃) of water to enable the tin-bismuth-cadmium-lead alloy to be in a molten state, cutting a newly-collected palm rattan raw material into a certain specification from internodes, putting the palm rattan raw material into the container filled with the molten alloy, and pressing the palm rattan raw material to be submerged below the liquid level of the molten alloy by using a weight;

due to the heating of the molten alloy, liquid moisture in the palm rattan raw material is gasified and air is heated to rapidly expand to be discharged out of the rattan material, so that vacuum negative pressure is generated in the rattan material, the molten alloy is sucked into the palm rattan material, and the liquid moisture and the air in the palm rattan material are replaced;

step 2, obtaining finished products

Taking out the sample after the constant weight is reached, wiping the surface of the sample before the molten alloy is solidified, putting the sample into a dryer, and cooling to obtain a palm rattan material with metal coloring;

step 3, color detection

And (3) testing the color of the metal-colored palm rattan material obtained after the treatment in the step (2) by using a color difference meter, and comparing and analyzing the color with the value measured by the unmodified palm rattan material.

Compared with the prior art, the invention has the following advantages: provides a new method for coloring the palm rattan raw material metal; compared with uncolored palm rattan materials, the metal colored palm rattan materials obtained by the method have the advantages of dark lightness, red-yellow color changing to blue-green color, reduced color saturation, increased hue angle value, very large total color difference, two completely different colors before and after coloring, and abundant means for dyeing and coloring the palm rattan materials. Meanwhile, the drying process of the palm rattan raw material is omitted, so that energy is saved; in addition, because the drying is carried out in time and under the condition of air isolation, the unevenness, uncontrollable enzyme discoloration, thermal discoloration and the like of the palm rattan in the drying process are reduced, the wood color of the palm rattan material is enriched, and the additional value of the palm rattan material and related products is improved.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

1. Test materials

(1) Preparing a palm rattan material:

selecting a plurality of newly harvested raw palm rattans, and removing rattan sheaths; and processing a plurality of test pieces with the length of 40mm by using the palm rattan material for later use.

(2) Alloy preparation:

the Sn-Bi-Cd-Pb alloy block with the melting point of 70 ℃ is purchased from the market.

2. Colouring of alloys

(1) Firstly, putting a tin-bismuth-cadmium-lead alloy with the melting point of 70 ℃ into a container, heating to the boiling point (100 ℃) of water to enable the alloy to be in a molten state, then putting a test piece with the length of 40mm into the container, and pressing the test piece under the liquid level of the molten alloy by using a weight;

(2) due to the heating of the molten alloy, liquid moisture in the palm rattan raw material is gasified and air is heated to rapidly expand to be discharged out of the rattan material, so that vacuum negative pressure is generated in the rattan material, the molten alloy is sucked into the rattan material, and the liquid moisture and the air in the rattan material are replaced;

(3) taking out the sample after the constant weight is reached, wiping the surface of the sample before the molten alloy is solidified, putting the sample into a dryer, and cooling to obtain a palm rattan material with metal coloring;

3. color difference measured by a color difference meter and total color difference (△ E) calculation

(1) The obtained metal-colored palm rattan material and untreated material were tested for L on the end face, side face and cross section by a color difference meter^*、a^*、b^*C and H values, and comparative analysis, see table 1;

(2) △ E calculation

According to the formula

The calculation was performed, and the calculation results are shown in table 1:

TABLE 1 color change before and after modification of Palmaria palmata

4. Analysis and conclusions

According to the calculation result, compared with the standard sample, the palm rattan material and the modified material are white, red and yellow in color, the color saturation and the hue angle value are increased, and the total color difference is very large; in contrast, the degrees of whiteness, redness and yellowness, the color saturation and the total color difference of the palm rattan modified material are all smaller than those of the palm rattan material, but the value of the hue angle is larger than that of the material.

Compared with a palm rattan material sample, the metal-colored palm rattan material obtained by the method has the advantages of dark lightness, red-yellow color changing into blue-green color, reduced color saturation, increased hue angle value, very large total color difference, and two completely different colors before and after coloring. Therefore, the method for dyeing and coloring the palm rattan is enriched.

In addition, the invention saves the drying process of the raw material of the palm rattan, thereby saving energy; meanwhile, because the palm rattan is dried in time and isolated from air, the unevenness, uncontrollable enzyme discoloration, thermal discoloration and the like of the palm rattan in the drying process are reduced, the material color of the palm rattan material is enriched, and the additional value of the palm rattan material and related products is improved.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

The present invention is not limited to the above description of the embodiments, and those skilled in the art should, in light of the present disclosure, appreciate that many changes and modifications can be made without departing from the spirit and scope of the invention.