JP2014076550A - Method for manufacturing lacquer substrate material and method for manufacturing lacquer ware using the substrate material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a lacquer substrate material which has adequate quality, allows a user to obtain (purchase) a desired amount of the lacquer substrate material at any time, and simultaneously, can be formed through a brief and simple substrate-material-forming step which does not require deftness.SOLUTION: The method for manufacturing comprises mixing raw lacquer and a stainless fine powder. A grain size of the stainless fine powder is preferably 3 to 50 μm. In addition, a compounding ratio of the raw lacquer to the stainless fine powder is preferably: the raw lacquer:the stainless fine powder=1:0.5 to 1.5 by weight ratio.

Description

The present invention relates to a method for manufacturing a lacquer base material and a method for manufacturing a lacquer ware using the base material.
More specifically, the present invention relates to a method for manufacturing a lacquer base material that eliminates the current situation that simplification of the base formation process in the lacquer ware manufacturing process, the acquisition of natural materials mixed with lacquer during the manufacture of lacquer base materials is difficult, and its The present invention relates to a method of manufacturing lacquerware using a base material.

The lacquer ware manufacturing method is roughly divided into a woodwork (kiji) adjustment process, a base formation (grounding) process, a consolidation process, an intermediate coating process, and a topcoating process (non-patent literature). 1).
In the lacquerware manufacturing method, a unique name is given to the base formation process depending on the raw materials used or the lacquer ware production area. There are also names such as Kisomoto groundwork.

And although there exists a common point about the foundation | substrate formation process in each of these names, the process peculiar to each name also exists. That is, in the base formation process in each of these names, a specific name may be given to each detailed process depending on the raw material used, the lacquer ware manufacturing site, or the like.
About the lacquer ware manufacturing method which has these foundation | substrate processes, it is called lacquer book hard coat, mud foundation coating, and Kisomoto foundation coating.

FIG. 1 shows an outline of a process of lacquer book hard coating, which is a typical method for manufacturing lacquerware (see Non-Patent Document 1).
Moreover, it is as FIG. 2 if it shows the detail in the base | substrate formation (grounding) process of the process of the lacquer ware manufacture by the lacquer book solid ground coating.

  As can be understood from the description in FIG. 2, the grounding process in the process of lacquer ware manufacturing by lacquer book solid ground coating is not only once but also three times, which is a troublesome process. That is, in the grounding process, the grounding process using paste lacquer, ground powder and fresh lacquer, which is called “Ippenji”, “Nippenji”, and “Senjichi”, is performed three times. A polishing process and a chipping process are performed following the 3rd grounding process.

In these localizing processes, drying and polishing are performed, and then the next grounding process is started. For example, after one side, drying and polishing are performed, and then two sides are performed.
About drying in this local attaching process, since the formed lacquer coating film is polished by subsequent polishing, it is necessary that the lacquer coating film is completely dried and adhered to the wood. Further, since this drying is natural drying, it takes a long time to complete the drying (that is, the drying that can be performed without any trouble).

In addition, this ground formation process is a simple work and requires skill (skilled level), so it is difficult for human resources due to lack of successors among lacquer craftsmen who employ a division of labor system.
In addition, the ground powder used in this grounding process is a baked diatomaceous earth native to Noto Peninsula, which is also used for the production of the Suzu City's famous seven wheels. It is difficult to obtain, and the present situation is waiting for the appearance of alternatives that can be obtained without limiting the desired amount.

The present applicant is a lacquerware industry cooperative of Kiso, which is composed of lacquerware manufacturers, but the process of lacquer ware manufacturing mainly employed in the production area is Kisomoto primer, and the method is as shown in FIG. is there.
Fig. 3 differs from Fig. 1 in that the entire process of the lacquer ware manufacturing process using Kisomoto primer is described in detail and comprehensively. It is performed three times as in the case of the process. In the illustrated steps, some of the steps may be omitted.

The coating material used in the third rusting process contains raw lacquer and a natural mineral called rust soil, as well as the material used in the lacquered hard grounding process. After the rusting step, there are a drying step and a polishing step in the same manner as the above-described three-step grounding step. As described above, in the lacquer ware manufacturing method using the Kisomoto foundation coating, the polishing process following the third rusting process and the third rusting process (3) corresponds to the foundation forming process.
In addition, the rust soil is a natural mineral produced in the mallet, which is diatomaceous earth like ground powder in lacquered hard ground, but the quality is reduced. However, the current situation is that the emergence of alternatives that can be obtained without restrictions is awaited.

“Basic knowledge of appreciation of lacquer art” 1 by Hidehide Komatsu, December 20, 1997 Published by Shibundo, pages 129-130, pages 167-178 "New lacquer lacquer art encyclopedia" Kogyo Publishing January 28, 2004 Kogyo Publishing Co., Ltd. pp. 54-55

As described above, for natural minerals that are mixed with lacquer in the base formation process, the quality is good and the desired amount can be obtained (purchased) regardless of the lacquerware production location, weather, etc. The emergence of materials is awaited.
In addition, as described above, since the base formation process requires a long time and requires a skillful technique, a material that can be a simple base formation process that does not require skill in a short time. Appearance is desired.

The inventors of this application are instructors, researchers, engineers, etc. belonging to the Department of Cultural Properties of the University and the Lacquerware Industrial Cooperative of Kiso. Both organizations are involved in various lacquer and lacquerware for the preservation and repair of cultural properties. We are doing joint research from various aspects, and we are also studying lacquer materials from many directions.
Under such circumstances, an attempt was made to mix various metal components into lacquer materials such as raw lacquer, and a patent application was already filed for the results (Japanese Patent Application No. 2012-222954).
Moreover, when stainless steel powder was mixed with raw lacquer as part of that, it discovered that it was hard and a coating film with favorable adhesiveness was formed.

And what should be especially emphasized is that when this coating film is used as a base, it has a performance as a lacquer base with a single layer without forming three layers like a conventional lacquer base. I was also able to find out. The present invention has been successfully developed based on these novel findings.
Therefore, this invention makes it the subject which the invention tends to solve to provide the lacquer base material which quality is favorable and a desired quantity can obtain (purchase) irrespective of a lacquer ware production place, the weather, etc. . Furthermore, this invention also makes it the subject which tries to solve providing the manufacturing method of the lacquer ware using the lacquer base material.

In addition, the invention of the present application is a lacquer base material that can greatly shorten the base formation period and can be made simple without requiring skill levels for craftsmen engaged in the base formation process as in the past. Providing is also a problem to be solved by the invention.
Moreover, this invention also makes it the subject which tries to solve providing the manufacturing method of the lacquer ware using this lacquer base material.

The manufacturing method of the lacquer base material of the present invention described above is characterized by mixing raw lacquer and stainless fine powder.
Moreover, the manufacturing method of the lacquer ware of this invention is characterized by using the lacquer base material produced by the said manufacturing method as a base material after solidifying the wood.

About the stainless fine powder used in the manufacturing method of the lacquer base material of this invention, a particle size becomes like this. Preferably 3-50 micrometers is good, More preferably, 7-40 micrometers is good.
Moreover, about the mixture ratio of raw lacquer and stainless steel fine powder, raw lacquer: stainless steel fine powder = 1: 0.5-1.5 are preferable by weight ratio, More preferably, 1: 0.7-1.3 are good. .

The invention of the present application reduces the reserves of natural mineral ground powder, rust, etc. used when mixing with fresh lacquer to produce a lacquer base material, making it difficult to obtain (purchase) the desired amount. In the inside, it is possible to provide a lacquer base material having excellent characteristics by using stainless fine powder instead of these natural minerals.
That is, according to the manufacturing method of the present invention, the lacquer base material can be stably produced, and the lacquer ware manufacturing process can be greatly shortened.

  Since the stainless fine powder used for the production of the lacquer base material of the present invention is an industrially produced iron alloy, it can be stably obtained (purchased) regardless of the lacquer ware production location, the weather, and the like. If it tries, in this invention, since it can obtain stably about the material mixed with raw lacquer when manufacturing a lacquer foundation material, the lacquer foundation material of this invention can be manufactured stably, and is manufactured. There is no need to worry about reducing or depleting raw material reserves.

Further, in the present invention, it is not necessary to apply the lacquer base material three times as in the case of the conventional lacquer book hard ground or the kisomoto base, etc., and only one time is required, so the application process can be reduced to one time. In addition, since the subsequent drying process and polishing process can be reduced to one time, the base formation process can be greatly shortened.
Furthermore, as a result of adopting the lacquer foundation material manufactured according to the present invention, the foundation formation process can be simplified without requiring skill as in the prior art, particularly in terms of spatulation. it can.

FIG. 1 shows an outline of a lacquer ware manufacturing process by lacquer book hard coating. FIG. 2 shows the details of the base formation (basement) process in the lacquer ware manufacturing process by the lacquer book solid ground coating. FIG. 3 covers all the steps of the lacquer ware manufacturing process based on Kisomoto primer, and shows it in detail. FIG. 4 shows a lacquer ware manufacturing process using a lacquer base material produced according to the present invention.

Below, the manufacturing method of the lacquer base material of this invention and the manufacturing method of the lacquer ware using the lacquer base material are demonstrated in detail.
Since the manufacturing method of the lacquer base material of this invention is characterized by mixing raw lacquer and stainless steel fine powder as above-mentioned, the manufacturing raw material to be used is raw lacquer and stainless steel fine powder.

The raw lacquer used in the manufacturing method is obtained by removing impurities such as bark and dust from a sap, which is called rough lacquer collected from a lacquer tree, by filtration (see Non-Patent Document 1).
Therefore, in the present invention, it is not necessary to go through the coconut process and the chrome process as in the case of manufacturing black lacquer using iron powder. Of course, it is also possible to produce a lacquer base material by mixing with.

In this invention, about the stainless fine powder mixed with raw lacquer, various commercially available things can be used without being restrict | limited especially, The thing as follows can be illustrated.
That is, the stainless fine powder includes ferrite, austenite, and martensite, but any of them can be used.
Specifically, examples of the ferritic stainless steel include SUS410, 430, 434, 444, and 446, and examples of the austenitic stainless steel include SUS304 and 306.

As for the stainless fine powder, the particle size is preferably 0.5 to 80 μm, preferably 3 to 50 μm, more preferably 7 to 40 μm.
Moreover, about the mixture ratio of raw lacquer and stainless steel fine powder, by weight ratio, raw lacquer: stainless steel fine powder = 1: 0.2-2.0 is good, Preferably it is 1: 0.5-1.5, More preferably, it is 1: 0.7 to 1.3.

In the lacquer base material manufactured by the manufacturing method of the present invention, when the content of the stainless fine powder exceeds 2.0, the viscosity increases, and handling becomes difficult when a coating film is formed using a brush.
On the contrary, when the content ratio of the stainless fine powder is less than 0.1, the viscosity decreases, and as a result, when the coating film is formed using a brush, the coating film becomes thin, and it is necessary to apply it twice or more. It is not desirable because it takes time to form a lacquer underlayer.

In the present invention, in order to produce a lacquer base material, raw lacquer and stainless fine powder are mechanically mixed at a predetermined ratio. In the mixing, various stirring and mixing devices can be used without limitation. However, since mixing with stainless fine powder is raw lacquer, the stirring and mixing device is used when stirring or mixing lacquer. The apparatus used for is preferable.
As such a stirring and mixing apparatus, a stirring apparatus including a container used in a coconut process and a chrome process and a stirrer including a stirring blade can be exemplified as a preferable one.

  The lacquer base material manufactured in this way is applied in the base formation process of the lacquer ware manufacturing process, but as the application object, various wooden items such as tableware, furniture, furniture and arts and crafts There are intermediate products in which lacquerware products such as wood consolidation are applied, and these lacquerware products are indicated by a more specific product name. Examples include a display shelf, a jewelry storage box, a music box case, a chest, a frame, a table, a table, a Buddhist accessory, and a building material. About the material (namely, base material) of the lacquer ware, wood, ie (wood base), is preferable.

The manufacturing process of the lacquer ware of this invention including the base formation process which apply | coats the lacquer base material is as FIG. Note that not all of the steps shown in FIG. 4 are necessarily executed, and some of them may be omitted.
According to FIG. 4, the manufacturing process of the lacquer ware according to the present invention includes adjustment of wood (in industry terms, “engraved” etc.), consolidation of wood, formation of ground with a lacquer foundation containing stainless powder, drying, There will be polishing, rusting, polishing, consolidation, water grinding, intermediate coating, and top coating.
Moreover, as is clear from this process, the lacquer base material manufactured according to the present invention is applied only once.

Since it is as above-mentioned, the lacquer ware manufacturing method of this invention using the lacquer foundation material manufactured by this invention apply | coats a lacquer foundation material 3 times like the lacquer book hard ground which is a conventional method, or a kisomoto foundation. There is no need. In the conventional method, natural drying is performed after forming the coating film in each base forming step, and the coating film gradually becomes thinner with the passage of time.
For example, in the drying after one side, the coating film gradually becomes thinner with the passage of time, and in order to recover it, the base coating is performed three times with two sides and three sides.

On the other hand, in this invention, after apply | coating the lacquer | flour base material containing raw lacquer and stainless steel fine powder, even if it naturally drys, a coating film does not become thin gradually with progress of time, but one base material of A desired base can be formed by coating film formation, and it is not necessary to apply the base material three times as in the conventional method.
The reason for this is not clear at present, but the applicant speculates that the material mixed with raw lacquer is not a natural mineral with water absorption like the conventional method, but is due to metal fine powder without water absorption. Yes.

Since it is as above-mentioned, in this invention, since the application | coating process of a base material can be made into 1 time, as a result, the subsequent drying process and grinding | polishing process can also be made into 1 time, in this invention, foundation | substrate formation The process can be greatly shortened.
Furthermore, the ground formation process can be simplified without requiring skill as in the prior art, particularly in terms of spatula and the like.

In the following, the details of the method for producing the lacquer base material of the present invention will be described with reference to examples, but the present invention is not limited in any way by the examples, and is specified by the description of the claims. It goes without saying that it is a thing.
Raw raw lacquer and stainless fine powder used in the examples are commercially available products and are as follows.

[Raw materials used]
Raw lacquer: (Raw materials made in China, sold by Kiso lacquerware industry cooperative association).
Stainless steel fine powder: (Daido Special Steel Co., Ltd., SUS446, particle size 15 μm, gray).
The color of the stainless fine powder is a result of visual observation.

[Production method of lacquer substrate]
The raw lacquer and the stainless fine powder were collected at the following two weight ratios, placed on a plywood, and mixed with a spatula until uniform. The time required to become uniform was 10 minutes.
(A) Fresh lacquer: stainless steel fine powder = 1: 1 (Example 1)
(B) Raw lacquer: stainless fine powder = 1: 2 (Example 2)
Specifically, in the case of (A), 10 g of raw lacquer and 10 g of fine stainless powder were collected and mixed.

[Kichi used for sample preparation]
As the wood base to which the lacquer base material prepared above is applied, the plywood (the decorative surface which is the outermost surface of the plywood is bonded with a thin plate of “Sina” tree of deciduous broad-leaved tree belonging to the genus Lindenaceae A plywood (thickness 9 mm) was used. The size and surface condition are as follows.
Size: 26 x 75 x 9 (mm)
Surface condition: Smooth by visual observation and tentacle observation.

[Sample preparation method]
The surface of the plywood is hardened with raw lacquer, dried for 24 hours, polished with abrasive paper (sandpaper (400 #)), and then the lacquer base material prepared by the preparation method is applied to the surface with a spatula. did.
After the application, it was normally cured for 8 hours, and then naturally dried in the workshop of the applicant's partner. The period required for the natural drying was 7 days. Although the room temperature of the workshop at that time is not directly measured, the dry time is mid-May, and the maximum indoor temperature at that time is about 22 ° C., and the minimum temperature is about 12 ° C.

[Sample performance (characteristic) test]
The sample prepared as described above was subjected to a scratch hardness (pencil method) test in accordance with JIS K 5600-5-4.
In addition, about this performance test, the performance test was similarly performed not only on the sample using the lacquer base material of the present invention but also on the base material used for the lacquer book hard ground and the kisomoto base for reference. .

The outline of the test method is as follows.
Using a pencil sharpener, pencils of various hardnesses are used to scrape the xylem so that the core becomes a smooth cylindrical shape, and then the tip of the core is flattened on abrasive paper. Next, after placing the sample on a horizontal plane and mounting the pencil on a predetermined test apparatus, the test apparatus is moved at a rate of 0.5 to 1 mm / s for at least 7 mm, and then the coated surface is visually observed. This test is repeated by increasing the hardness of the pencil until a scratch of 3 mm or more appears on the coated surface of the sample.

[Performance test results]
The performance test results are as shown in Table 1.

According to the performance test results, it is understood that 3H having the same hardness was obtained in both cases (A) and (B), that is, the ratio of fresh lacquer: stainless steel fine powder was 1: 1 and 1: 2. .
In addition, the same hardness as the base material of the present invention was obtained in the case of the base material of lacquer book hard ground (glue lacquer + ground powder). It is 4H, and the hardness one rank higher than 3H of the base material of the present invention is expressed.

Since it is as above, the coating film by the base material manufactured by the method of the present invention uses a base material that has been adopted for lacquer book hard coat and kiso book base coat that has been put into practical use for a long time. The same degree of hardness is expressed, and it has sufficient practicality.
In addition, the base material manufactured by the method of the present invention has a predetermined thickness without forming a coating film three times as in the base material employed in the conventional method, and is extremely efficient. A base film can be formed.

Claims (4)

  A method for producing a lacquer base material, comprising mixing raw lacquer and stainless fine powder.   The method for producing a lacquer base material according to claim 1, wherein the particle size of the stainless fine powder is 3 to 50 μm.   3. The method for producing a lacquer base material according to claim 1, wherein the mixing ratio of raw lacquer and stainless fine powder is: raw lacquer: stainless fine powder = 1: 0.5 to 1.5 by weight ratio.   The manufacturing method of the lacquer ware characterized by using the lacquer base material produced with the manufacturing method of any one of the said Claim 1 thru | or 3 as a base material after solidifying a wooden ground.

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