JP5045893B2 - How to apply lacquer - Google Patents

Description

  The present invention relates to a lacquer coating method for coating lacquer on the surface of an object to be coated such as wood.

  Conventionally, as a lacquer application method, for example, a so-called sliding lacquer or wiping lacquer is known (see Non-Patent Document 1). As shown in FIG. 4, this lacquer coating method Ta applies the liquid lacquer 103 with the brush 102 as shown in FIG. 4A in a state where the surface 101 of the article 100 is dry. Next, as shown in FIG. 4B, the lacquer 103 is wiped with a dry cloth 104 as a liquid-absorbing member, and then the above-described coating operation is repeated a plurality of times to finish. In this way, the color and gloss of the lacquer are adjusted by the number of times the lacquer 103 is applied.

"Lacquer-its science and practical skills" September 15, 1999, published by Riko Publishing Co., Ltd.

  However, in this conventional lacquer coating method Ta, in order to sufficiently bring out the color and gloss of the lacquer, it is necessary to repeat the coating and wiping many times, which increases the number of steps and labor. was there. Further, since the lacquer 103 is absorbed by the dry cloth 104 at the time of wiping, there is a problem that the amount of lacquer 103 to be used increases and is wasteful.

  The present invention has been made in view of such problems, so that even if the number of steps is reduced, the color and gloss of the lacquer can be sufficiently obtained, and the amount of lacquer to be used is reduced so that there is no waste. Thus, an object of the present invention is to provide a method for applying lacquer in which cost is reduced.

In order to achieve such an object, the lacquer coating method of the present invention uses a flexible liquid-absorbing member, and in the lacquer coating method for applying lacquer to the surface of an object to be coated, the liquid-absorbing property described above. The member was impregnated with water, and liquid lacquer was slid onto the substrate to be coated by the liquid absorbing member.
The lacquer liquid is applied to a liquid-absorbing member impregnated with water and slid onto the object to be applied, or is applied to the object in advance with a brush or a spatula, and then impregnated with water. The liquid-absorbing member may be rubbed and applied, and may be appropriately changed.

  Thereby, since water and lacquer are not mixed, the liquid absorbing member containing water becomes difficult to absorb lacquer. Therefore, the amount of lacquer that is absorbed by the liquid-absorbing member and is not applied to the coated body is reduced. That is, with a small amount of lacquer, lacquer can be applied to the object to be coated, and the coating efficiency is improved accordingly. Moreover, compared with the conventional technique, the lacquer coating film that can be formed by a single coating operation becomes thicker, and the lacquer color and gloss can be sufficiently produced even if the number of steps is reduced. In this respect as well, the amount of lacquer used can be reduced. In addition, since the number of steps is reduced, workability is improved.

  And if necessary, in a lacquer coating method of applying lacquer on the surface of an object to be coated using a flexible liquid absorbent member, the liquid absorbent member is impregnated with water, and the liquid absorbent member A liquid lacquer was attached to the substrate, and the lacquer was slid onto the object to be coated.

  As a result, in addition to the above operations and effects, application and wiping are performed at the same time. Therefore, man-hours are reduced accordingly, and workability is improved. In addition, if the material is applied to the substrate in advance with a brush or spatula, and then applied by rubbing it, the amount of lacquer may be excessively increased, but the water-absorbing liquid impregnated with water Since liquid lacquer is directly adhered to the sex member, an appropriate amount can be applied, and the amount of lacquer to be used can also be reduced in this respect.

  Moreover, the said liquid absorptive member is comprised with the cloth as needed. Thereby, since it is cloth, moisture absorption is performed well. Therefore, it comes to repel lacquer well and the application efficiency is further improved. In addition, since cloth is stronger than paper, it is less likely to be broken up by the friction generated during the application work, and the dust is prevented from adhering.

  Furthermore, if necessary, the cloth is made of cotton. Compared with synthetic fiber, cotton has good water absorption, so that the coating efficiency is improved. In addition, since cotton does not fuzz even during friction during the coating operation, it is even more difficult to break up and become dust, and dust adhesion is suppressed.

Furthermore, if necessary, the moisture content of water impregnated in the liquid-absorbing member was set to 15 to 70% by weight. Thereby, the optimal moisture content corresponding to the raw material which comprises a liquid absorptive member can be obtained, and application | coating operation | work can be performed effectively.
If the moisture content exceeds 70% by weight, water droplets are likely to adhere to the coated surface of the coated body, and traces of water droplets may remain after the lacquer is cured, which is not preferable. On the other hand, if the moisture content is less than 15% by weight, the liquid-absorbing member is close to a dry cloth, so that the gloss is hardly produced and the amount of lacquer used is also increased.

  Further, if necessary, the liquid absorbent member is made of cotton as a cloth, and the water content impregnated in the liquid absorbent member is 35 to 65% by weight. According to the result of measuring the moisture content suitable for the application work using a cotton material cloth as the liquid-absorbing member, it becomes optimal when the moisture content is 35 to 65% by weight, and the application work can be performed effectively.

  According to the lacquer coating method of the present invention, water and lacquer are not mixed by impregnating the liquid-absorbing member with water. Therefore, the liquid-absorbing member containing water is difficult to absorb lacquer. Therefore, the amount of lacquer that is absorbed by the liquid-absorbing member and is not applied to the coated body is reduced. That is, with a small amount of lacquer, lacquer can be applied to the object to be coated, and the coating efficiency is improved accordingly. Moreover, compared with the conventional technique, the lacquer coating film that can be formed by a single coating operation becomes thicker, and the lacquer color and gloss can be sufficiently produced even if the number of steps is reduced. In this respect as well, the amount of lacquer used can be reduced. In addition, since the number of steps is reduced, workability is improved.

Hereinafter, a lacquer coating method according to an embodiment of the present invention will be described with reference to the accompanying drawings.
1 to 3 show a lacquer coating method T according to an embodiment of the present invention. The lacquer coating method T is performed using the liquid-absorbing member 1, the liquid lacquer 10, and the coated body 20.

  As shown in FIG. 1, the liquid-absorbing member 1 is configured using a flexible and liquid-absorbing material. In the embodiment, the liquid-absorbing member 1 is composed of a cloth made of cotton. Such a liquid absorbent member 1 is impregnated with water 2.

  The water content of the water 2 impregnated in the liquid-absorbing member 1 is set to 15 to 70% by weight. The moisture content is calculated by the following equation: moisture content (% by weight) = water content / (water content + cloth weight) × 100. In the embodiment of the present invention, the liquid-absorbing member 1 is made of a cloth made of cotton. In this case, it is more desirable that the moisture content is set to 35 to 65% by weight.

  Lacquer 10 is a sap collected from a lacquer tree as shown in FIG. Trees belonging to the genus Urushi that naturally grow in Japan include Yamaurushi, Hazenoki, Yamahaze, Nurde, and Ivy. The lacquer 10 includes raw lacquer and refined lacquer, and in the embodiment, quick-drying lacquer (for example, see Japanese Patent No. 3655352) is used among the refined lacquer.

  As shown in FIG. 1, the material to be coated 20 may have any material and shape. In the embodiment, wood is produced using wood.

  When the coating operation is performed by the lacquer coating method T according to the embodiment of the present invention configured as described above, it is as follows. First, the cloth which is the liquid absorbing member 1 is impregnated with water 2. At this time, the impregnation is performed so that the moisture content is 35 to 65% by weight.

  Next, in this state, the lacquer 10 is attached to the liquid-absorbing member 1 and the lacquer 10 is applied to the substrate 20. At this time, the lacquer 10 is slid so as to extend evenly on the coated body 20. In this case, application and wiping are performed simultaneously. Moreover, since the lacquer 10 and the water 2 are not mixed, the lacquer 10 is hardly absorbed by the liquid absorbent member 1 containing the water 2. That is, since the lacquer 10 to be used is applied to the coated body 20 without waste, even a small amount of the lacquer 10 can sufficiently give the color and gloss of the lacquer.

  In addition, since the amount of lacquer 10 to be wiped off is reduced as compared with the conventional method, the coating film 11 of the lacquer 10 that can be formed by a single coating operation becomes thicker, and the color and gloss of the lacquer are sufficient even if the number of steps is reduced. It will come out. In addition, since man-hours are reduced, workability is improved accordingly.

  Furthermore, since quick-drying lacquer has a high viscosity, it is difficult to wipe off by the conventional method, and the difficulty of the wiping operation is high. However, in this embodiment, the liquid-absorbing member 1 contains water 2. This water 2 improves slipping and facilitates application and wiping. Further, compared with paper, cotton is strong, so that it is difficult to break up and become dust due to friction generated during the application work, and the adhesion of dust is suppressed.

If the lacquer 10 is applied to the object 20 to be coated, the lacquer needs to be dried in a place with a high humidity, and is cured, for example, in a place with a temperature of 20 to 30 ° C. and a humidity of 70 to 85%. Further, for example, the lacquer may be baked in an electric furnace.
Such a process is repeated several times to complete. Compared to the conventional method, the same lacquer color and luster can be produced with about half the man-hours.

  Next, the example shown in FIG. 2 was prepared, and the coating test was performed about each Example. Below, the test result of the raw material selection test performed in order to investigate the suitable thing as a raw material which comprises the liquid-absorbing member 1 in the coating method T of the lacquer of this invention is demonstrated. This test was carried out using the quick-drying lacquer 10 by the same coating method as in the above-described embodiment.

The liquid absorbing member 1 was impregnated with water 2 at different moisture percentages, and a coating test of each material was performed. Wood was used as the coated body 20.
In advance, the weight of the liquid-absorbing member 1 in a completely dry state was measured. Next, water was appropriately added to the liquid-absorbing member 1 to determine whether it could actually be applied after measuring the weight. Since the ease of spreading when the coating method T of the present invention is established and the gloss of the coated surface can be judged visually and visually, the amount of water that can be coated was specified based on this criterion.

As a first example, a test was performed using a cloth made of cotton. One piece of cloth is woven and used with a vertical width of 20 mm, a horizontal width of 20 mm, and a thickness of 20 mm. This cloth was impregnated with water 2 to test the moisture content at 50% by weight. Cotton is difficult to fluff, so it is difficult to roughen the coated surface. Moreover, since it is strong, it is difficult to be broken up by the friction generated during the coating operation, and the dust is prevented from adhering. The liquid absorption was also excellent and the test results were very good.
As a second example, a test was performed using a fabric made of cotton knitted fabric. Knitted weave increases the stretchability of the fabric. Others were the same as in the first example, so the test results were very good.

  As a third example, a test was performed using a cloth made of pulp. One piece of cloth is woven and used with a vertical width of 20 mm, a horizontal width of 20 mm, and a thickness of 20 mm. This cloth was impregnated with water 2 to test the moisture content at 50% by weight. Pulp is a fiber used mainly for papermaking. A thick fiber is durable and durable, so that it does not collapse due to friction generated during the coating operation, whereas a thin fiber is weak in durability and may collapse due to friction generated during the coating operation. Although it can be used for the coating operation, it is inferior in durability compared to cotton.

  As a fourth example, a test was performed using a cloth made of polypropylene. One piece of cloth is woven and used with a vertical width of 20 mm, a horizontal width of 20 mm, and a thickness of 20 mm. This cloth was impregnated with water 2 to test the moisture content at 50% by weight. Polypropylene is a polymer obtained by polymerizing propylene and is strong, but has a characteristic of poor liquid absorption. Moreover, it may collapse | crumble by the friction which generate | occur | produces at the time of an application | coating operation | work, and there is much fuzzing, and it will break up and adhesion of refuse will increase. Although it can be used for the application work, it is difficult to use because it is less absorbent and more fuzzy than cotton.

  As a fifth example, a test was performed using a sponge made of polyurethane foam. A sponge having a vertical width of 20 mm, a horizontal width of 20 mm, and a thickness of 20 mm was used, and this sponge was impregnated with water 2 to test the moisture content at 50% by weight. Polyurethane foam is characterized in that it can be made with a wide range of properties, from soft to hard, and from fine to coarse cells. The liquid-absorbing property was also excellent, and it did not collapse due to friction generated during the coating operation, and the test results were good. However, when a soft material is used, there is a point that the degree of use is slightly increased and it is difficult to use.

  As a sixth example, a test was conducted using a sponge made of rubber. A sponge having a vertical width of 20 mm, a horizontal width of 20 mm, and a thickness of 20 mm was used, and this sponge was impregnated with water 2 so that the water content was 20% by weight. Since the rubber sponge is durable, does not collapse due to friction generated during the coating operation, and has liquid absorption, the test results are good. However, when a soft material is used, there is a point that the degree of use is slightly increased and it is difficult to use.

  As a seventh example, a test was performed using tissue paper made of pulp. A plurality of tissue papers were stacked and used with a vertical width of 20 mm, a horizontal width of 20 mm, and a thickness of 20 mm. The tissue paper was impregnated with water 2 to make the moisture content 50% by weight. As described above, pulp is a fiber mainly used for papermaking, and tissue paper is a material having fine fibers. Durability can be enhanced to some extent by stacking a plurality of tissue papers. Although it can be used for the coating operation, it is inferior in durability compared to cotton.

  As an eighth example, a test was performed on a fabric made of wool. A cloth having a length of 20 mm, a width of 20 mm, and a thickness of 20 mm was used, and the cloth was impregnated with water 2 to test the moisture content at 30% by weight. Since wool has almost no liquid absorbency, it takes a lot of labor to raise the moisture content to the set value. Although it can be used for coating work, it is not recommended because it has almost no liquid absorbency.

  The test result of the material selection test is shown in FIG. As the liquid-absorbing member 1, ◎> ○> Δ> × indicates suitability in order from the optimum material.

  Next, a good material was selected in the material selection test. Good results were obtained in the materials tested in the first example, the second example, the fifth example, and the sixth example, and it was judged that the material was appropriate as the material of the liquid absorbent member 1 of the present invention. About these materials, the moisture content test which measures the moisture content suitable for an application | coating operation | work was done.

  Below, the test result of the moisture content test is demonstrated. In this test, in order to measure an appropriate range of the moisture content, a coating test was performed several times while varying the moisture content for each material. The coating operation was performed by the same coating method as in the above embodiment. The test result of the moisture content test is shown in FIG.

As a result of performing the coating test several times with the moisture content varied for the first example, the proper use range is 35 to 65% by weight, preferably 40 to 53% by weight as shown in FIG. The result was obtained.
As a result of testing the second example, it was found that the proper use range was 35 to 65% by weight, preferably 42 to 60% by weight as shown in FIG.

As a result of testing the fifth example, the proper use range was 45 to 85% by weight, preferably 50 to 78% by weight as shown in FIG.
As a result of testing the sixth example, it was found that the proper use range was 15 to 35% by weight, preferably 17 to 31% by weight as shown in FIG.

From the above results, the proper materials constituting the liquid-absorbing member 1 in the lacquer coating method T of the present invention were a cloth made of cotton, and a sponge made of urethane foam and rubber. However, with regard to the sponge, when a soft one is used, there is a point that the degree of difficulty of use is slightly increased and it is difficult to use, and that is inferior to cloth.
From this, it can be said that the liquid-absorbing member 1 is more preferably composed of a cloth made of cotton.

In the above-described embodiment, the liquid-absorbing member 1 is made of a cloth made of cotton. However, the present invention is not necessarily limited to this, and any material suitable for liquid-absorbing property and durability may be used. There is no problem. What is considered appropriate in the application test may be used.
Moreover, in the said embodiment, although the quick-drying lacquer 10 was used, it is not necessarily limited to this, What kind of lacquer may be sufficient and can change suitably.

Furthermore, in the said embodiment, although the conditions for hardening of the lacquer 10 were set as said setting, it is not necessarily limited to this, What is necessary is just the conditions which can harden the lacquer, and it may change suitably.
Furthermore, in the above embodiment, the method of applying the lacquer 10 is performed by the above method, but is not necessarily limited to this, and is a liquid-absorbing member impregnated with water after being applied with a brush or a spatula. A method of rubbing may be used, and may be changed as appropriate.

It is a side view which shows the coating method of the lacquer which concerns on embodiment of this invention. It is a table | surface which shows the result of the raw material selection test which concerns on embodiment of this invention. It is a table | surface which shows the result of the moisture content test which concerns on embodiment of this invention. It is a figure which shows an example of the coating method of the conventional lacquer.

Explanation of symbols

T Lacquer coating method 1 Liquid absorbing member 2 Water 10 Lacquer 11 Coating film 20 Object to be coated

Claims (5)

In a lacquer coating method that uses a flexible liquid-absorbing member to apply lacquer on the surface of an object to be coated,
The liquid absorbent member is impregnated with water, and the water content of water impregnated in the liquid absorbent member is set to 15 to 70% by weight, and liquid lacquer is slid onto the coated body by the liquid absorbent member. A method of applying lacquer characterized by applying. In a lacquer coating method that uses a flexible liquid-absorbing member to apply lacquer on the surface of an object to be coated,
The liquid absorbent member is impregnated with water, and the water content of water impregnated in the liquid absorbent member is set to 15 to 70% by weight, and liquid lacquer is attached to the liquid absorbent member to adhere to the coated body. A method of applying lacquer characterized by rubbing and applying lacquer.   The lacquer coating method according to claim 1 or 2, wherein the liquid absorbing member is made of cloth.   The lacquer coating method according to claim 3, wherein the cloth is made of cotton.   The lacquer coating according to claim 1 or 2, wherein the liquid absorbent member is made of cotton as a cloth, and the water content of water impregnated in the liquid absorbent member is 35 to 65% by weight. Method.

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