JPS5940073B2 - Manufacturing method for architectural board with ricin striped pattern - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a construction board having a ricin striped pattern.

Traditionally, ricin patterns have been used as a form of decorative wall painting.

The ricin pattern applied to this painted wall is given by applying a top coat of mortar mixed with Bortland cement, colored sand, and coloring agent, and roughening the surface with a comb-shaped sheet metal, wire brush, etc. before it fully hardens. However, when making industrial features, a method has been adopted in which a mixture of thermoplastic resin paint and granular aggregate is applied to the surface of the substrate using a roll. The surface properties obtained in this manner were simple and rough, with the entire surface being flat and rough. The object of this invention is to provide a construction board having a so-called ricin-like striped pattern in which a ricin-like striped pattern is formed in a ricin pattern characterized by a flat rough surface, and which has a high decorative effect as an interior and exterior material. It is something to do.

Furthermore, the ricin pattern and the ricin-like striped pattern formed in the ricin pattern are smoothly formed on the substrate, and the ricin-like striped pattern is provided by a plurality of raised lines of granular aggregate. This granular aggregate must not be peeled off by a slight impact force, and the present invention aims to improve this point as well. The above purpose is to rotate in the same direction as the rotation direction of the backup roll at a circumferential speed of 1.5 times or less than the circumferential speed of the backup roll, and to have grooves for forming a striped pattern carved in the circumferential direction of the circumferential surface. Granules 1 with a diameter of about 1.3n to 2.0mm are coated using a coating roll that is
0 to 30% by weight of granules with a smaller diameter than the granules 70 to 9
This is achieved by the manufacturing method of the present invention, which is characterized in that a substrate is coated with a thermoplastic coating composition containing 20 to 80% by weight of granular aggregate consisting of 0% by weight.

The means adopted by this invention will be specifically explained below.

First, this invention is aimed at construction boards that can be applied to wall panels for constructing walls coated with ricin finish or ceiling panels for constructing ceilings coated with ricin finish, but these are the substrates used in the present invention. For example, asbestos cement board, asbestos calcium silicate board, pulp cement board, wood wool cement board, wood powder cement board, gypsum board, rock wool board, glass fiber reinforced cement board, gypsum cement board, which has been used for various purposes. etc., of course.

Other examples include wood plates and metal plates. A paint composition in which granular aggregate is mixed with a thermoplastic paint is used to form a striped pattern on this substrate. As this thermoplastic paint, a paint containing a thermoplastic polymer substance such as vinyl acetate type, vinyl chloride type, acrylic type, or styrene SBR type is used as a solid component. For exterior building boards, weather resistance is required, so styrene-modified acrylic resins are suitable, and for interiors, vinyl acetate, acrylic, styrene, etc., which are effective for aesthetic finishes, are suitable. . As the granular aggregate, cold water sand, silica powder, porcelain powder, etc. can be used alone or in combination, but there are no particular restrictions on the materials. The blending ratio of granular aggregate is 20 to 80% in the paint composition.
The range is such that the amount is % by weight.

If the content of granular aggregate in the coating composition exceeds 80% by weight, not only will the adhesion of the granular aggregate become uncertain, but also the coating roll will be prone to scratching, resulting in uneven coating, and if it is less than 20% by weight, This is because the undulations and striped patterns on the building surface provided by the granular aggregate become unclear. The particle size distribution of this granular aggregate is preferably a collection of granules with different diameters: small, medium, and large. Depending on the density of the striped pattern, the coating amount is 400 to 1000t/Rnl, and 10 to 30% by weight of granules with a diameter of about 1.3 to 2.0wm, 0.3 to 1.3mm. 10 to 30% by weight of granules.
A particle size distribution of 40 to 80% by weight of 0.3n or less is optimal. If the particle size is uniform, voids are likely to be formed between the particles, so that the particles that provide the striped pattern are likely to peel off from the substrate, and the striped pattern is likely to be damaged. On the other hand, granules J that give a substantially striped pattern, i.e. 1.3-2.
It is effective to use a granular aggregate having a particle size distribution of 10 to 30% by weight of 0n particles and 70 to 90% by weight of particles smaller than this diameter. Regarding the viscosity of the coating composition, 70 to 100 poise is appropriate.

The reason for this is that if the number of voids is less than 70, separation will occur between the paint and the granular aggregate, the fixation of the granular aggregate will become uncertain, damage to the striped pattern will occur, and it will be difficult to form a rough surface.
This is because if the poise is exceeded, the transfer of the coating composition from the coating roll to the substrate becomes poor. Next, the 6ζ coating method will be described. A natural coating in which the rolls rotate in opposite directions not only makes it difficult to transfer the coating composition, but also causes variations in the striped pattern from side to side, making it unusable. Only by reverse roll coating, in which the coating roll and back-up roll rotate in the same direction, can a striped ricin pattern be smoothly applied to the substrate. This coating method will be explained with reference to the drawings. In Fig. 1, the coating device is a coating roll 2.
, a back-up roll 5 provided at a distance below the coating roll 2, and a doctor roll 4 in contact with the circumferential surface of the coating roll 2, and the rotation directions of the coating roll 2 and the back-up roll 5 are the same. In addition, grooves (not shown) are cut in the circumferential direction on the circumferential surface of the coating roll 2. Then, the coating composition 1 that gives the Rin 7 striped pattern is supplied between the circumferential surfaces of the coating roll 2 and the doctor roll 4.
and 4, the coating composition 1 is coated on the substrate 3 which is conveyed between the coating roll 2 and the backup roll 5. In this case, it is preferable to preheat the substrate 3 before coating it because this will speed up the curing speed of the paint and stabilize the striped pattern. The shape of the groove carved on the circumferential surface of the coating roll 2 is determined in accordance with the design of the striped pattern.
~1m1. A feature of the above coating method is that the peripheral speed of the coating roll 2 is limited to 1.5 times or less, preferably 1.2 to 1.3 times the peripheral speed of the back-up roll 5. That is, if the circumferential speed of the coating roll exceeds 1.5 as compared to the circumferential speed of the back-up roll, the amount of transfer of the coating composition will increase, and a striped pattern corresponding to the grooves of the coating roll will not be formed. After the ricin striped pattern is formed on the substrate in this manner, it is dried, and if necessary, a top coat is applied to form the final product.

Examples and comparative examples are given below to further clarify the effectiveness of the present invention.

Common points across the Examples and Comparative Examples are listed below.

(1) The gap between the coating roll and the doctor roll is constant.

(2) The thermoplastic paint used was a paint whose solid content was styrene-modified acrylic resin.

(3) The substrate is an asbestos cement board. Incidentally, the manufacturing conditions etc. are as shown in the table below.

Example 1 The Lin 7 pattern striped pattern of this architectural board has substantially no gaps between the granules that give the striped pattern, no detachment of granular aggregate, and is uniform on both sides, which is the desired pattern. Ta.

Example 2 Under these conditions, the undulations of the striped pattern were clearer than the Rin 7 striped pattern in Example 1, which was the desired pattern.

There was no detachment of granular aggregate, and the striped pattern was uniform on both sides. Example 3 Under these conditions, striped undulations were formed in small increments.

In addition, the desired ricin pattern pattern was obtained that was uniform on both sides without detachment of the granular aggregate. Example 4 Under these conditions, a ricin striped pattern very similar to Example 2 was obtained.

That is, compared to Example 2, the feeling of solidity was slightly increased, and the undulations of the striped pattern were clear. Furthermore, there was no detachment of granular aggregate, and a uniform target product was obtained on both sides. Example 5 Under these conditions, a ricin striped pattern very similar to Example 3 was obtained.

This product had no detachment of granular aggregate and was uniform on both sides. Example 6 Under these conditions, a ricin striped pattern very similar to Example 3 was obtained.

This product had no detachment of granular aggregate and was uniform on both sides. Comparative Example 1 Under these conditions, not only did the coating amount vary from side to side, but it was also impossible to obtain a ricin striped pattern.

Comparative Example 2 Under these conditions, the ricin pattern remained flat and no striped pattern could be obtained.

Comparative Example 3 Under these conditions, not only part of the granular aggregate was exposed and was not sufficiently fixed to the paint, but also the granular aggregate was detached.

Comparative Example 4 Under these conditions, a striped pattern was not obtained and the pattern was branched and had poor cosmetic properties.

In addition, some granular aggregates were detached. Comparative Example 5 Under these conditions, there was no striped pattern in the ricin pattern in which the granular aggregate was detached.

Comparative Example 6 Under these conditions, the ricin pattern was extremely uneven with detachment of the granular aggregate, and no striped pattern could be observed in the pattern as in Comparative Example 5.

[Brief explanation of the drawing]

FIG. 1 is a side view of a coating device using reverse roll coating according to an embodiment of the present invention. 1... Paint composition, 2... Coating roll, 3... Substrate, 4... Doctor roll, 5... Backup roll. .

Claims (1)

[Claims] 1. A coating roll that rotates in the same direction as the rotational direction of the backup roll at a circumferential speed that is 1.5 times or less than the circumferential speed of the backup roll, and has grooves for forming striped patterns in the circumferential direction of the circumferential surface. using a diameter of about 1.3 mm to 2.
A granular aggregate consisting of 10 to 30% by weight of 0 mm granules and 70 to 90% by weight of granules with a smaller diameter than the granules is 20 to 30% by weight.
A method for manufacturing a construction board having a striped ricin pattern, which comprises coating a base material with a thermoplastic coating composition containing 80% by weight.