JPS6225197B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating film for pasting and a method for producing the same. More specifically, the present invention relates to a coating film for application that is extremely easy to apply at a construction site and has excellent coating film performance such as weather resistance, water resistance, and chemical resistance.

The coating film as used in the present invention means a cured film-like coating material.

Conventionally, paints can be broadly classified into two types: liquid paints and powder paints. Liquid paints have the advantage of being easy to mix colors, but when applying at the construction site, care must be taken to prevent splashes from spreading into the surrounding area. There were various restrictions due to the use of organic solvents.

In addition, if there are irregular irregularities on the surface of the object to be painted, and if the irregularities are to be painted as is without destroying or correcting them, as shown in the construction cross section of Fig. 10, thin layer parts 8 and thick parts 9 , the coating film B is uneven, and there is paint loss to the cracks 6 and porous areas 7, and in the case of large cracks 61, depressions 63 are formed on the painted surface, impairing the aesthetics. Therefore, when cracks 62 occur after construction, the paint film fractured portion 64 not only impairs the aesthetic appearance, but also causes rain buildup. Powder coatings often have extremely excellent film performance such as weather resistance, water resistance, and chemical resistance, but they require special equipment and can only be used if they are large enough to be transported into this equipment. Since it could not be painted and it was difficult to change the color, there were various restrictions.

The purpose of the present invention is to provide a coating film for pasting, that is, a film-like coating, which can be called a third coating, which solves the drawbacks of conventional liquid coatings and powder coatings, and combines the advantages of both. It is in. That is, the adhesive coating film of the present invention does not cause any droplets to be scattered around during construction, and does not require the use of organic solvents that are harmful to the human body. Does not require special equipment,
Construction at the construction site is extremely easy. Multiple colors can be used at the same time, and it is weather resistant.
The coating film performance, such as water resistance and chemical resistance, is comparable to that of powder coatings.

In addition, if there are irregular irregularities on the surface of the object to be painted, if the irregularities are not destroyed or corrected and the surface is pasted as is, as shown in the construction cross section in Figure 9, the thin layer of the paint film, the There is no thick part, and the coating film A is uniform.
In addition, there is no loss to the cracks 6 or porous parts 7, and in the case of large cracks 61, they can be covered as is without damaging the aesthetics, and even if cracks 62 occur after construction, as long as they are not extremely large cracks, By extending the product of the present invention, it will not cover the cracks and impair its aesthetic appearance, nor will it cause rain build-up.

In the present invention, a flexible nonwoven fabric with a thickness of about 30 to 200 microns has a pressure-sensitive adhesive or adhesive layer coated and impregnated on one side, and a separator layer provided on top of the adhesive, and the remaining side is hardened. To provide a coating film for pasting, which has a cured layer of a liquid coating material that is flexible after curing, and a fusion layer of a powder coating material that is flexible after curing thereon.

In addition, in the present invention, one side of a flexible nonwoven fabric with a thickness of about 30 to 200 microns is coated and impregnated with an adhesive or an adhesive, this side is protected with a separator, and the remaining side of the nonwoven fabric is coated with a flexible adhesive after curing. To provide a method for producing a coating film for pasting, which involves applying and impregnating a liquid coating material having the following properties, and during this uncured period, spraying and adhering a powder coating material having flexibility after curing, and heating and melting and curing the powder coating material.

The configuration will be explained below based on the drawings. In the drawings, Figures 1 to 6 are cross-sectional views of the product of the present invention for explaining the process of the present invention, Figure 7 is a cross-sectional view of the product of the present invention with the embossed surface adjusted, and Figure 8 is the surface. FIG. 9 is a cross-sectional view of the product of the present invention made flat, FIG. 9 is a cross-sectional view of the product of the present invention after construction, and FIG. 10 is a cross-sectional view of the product painted with a conventional liquid paint.

Suitable materials for the nonwoven fabric 1 used in the present invention include pulp, rayon, polyester, polyamide, and glass fiber. The material of the nonwoven fabric can be selected depending on the performance to be added to the adhesive coating film of the present invention. For example, when particularly desired to add weather resistance, polyester, polyamide, etc. are preferable, and when particularly desired to add heat resistance, glass fiber is preferable. If you particularly want to add electrical conductivity, it is recommended to use a nonwoven fabric using copper fibers. The thickness of the nonwoven fabric is preferably about 30 to 200 microns in terms of its flexibility, toughness against tension, etc., and cost. If it is extremely thinner than this, it may lack tensile strength or become expensive. If it is thicker than this, flexibility may be lost, which is undesirable.

The adhesive or adhesive 2 used in the present invention is an acrylic-based, rubber-based adhesive, or a vinyl acetate-based, urethane-based, or glue-based adhesive. Appropriate methods include those that activate the These adhesives or adhesives must be flexible. This is because these pressure-sensitive adhesives or adhesives must be flexible in order to make the adhesive coating film of the present invention adhere to the surface of uneven objects such as stuccos and bontiles. The degree to which these adhesives or adhesives are applied and impregnated into the nonwoven fabric is as follows:
It is best that it does not seep out to the other side of the nonwoven fabric. The thickness of the pressure-sensitive adhesive or adhesive layer, including the portion impregnated into the nonwoven fabric, is usually about 20 to 200 microns. However, when using a butyl rubber adhesive, the thickness may be around 300 to 2000 microns. In this way, the adhesive coating film of the present invention has excellent waterproof properties and electrical insulation properties.

The separator 3 used in the present invention may be any ordinary separator used to protect the adhesive.
However, it is necessary that it can withstand the heating required in the manufacturing process of the present invention. The thickness of the separator is usually about 20 to 100 microns.

The liquid coating material 4 used in the present invention needs to have flexibility after curing. Specifically, urethane-based, phthalic acid-based, and rubber-based paints are preferred. Paints that become flexible when mixed with a plasticizer, such as vinyl chloride paints, can also be used with a plasticizer mixed in. The thickness of the liquid paint layer is usually about 30 to 100 microns. A portion of the liquid paint is impregnated into the fibers of the nonwoven fabric.
Appropriate methods for applying and impregnating the surface of the nonwoven fabric with the liquid paint include spraying, roll coater, knife coater, and the like. Since the liquid paint and the adhesive or adhesive are both impregnated into the fibers of the nonwoven fabric and are in contact with each other, both the cured layer of the liquid paint and the adhesive or adhesive have physical strength due to the fibers of the nonwoven fabric. has been strengthened.

The powder coating 5 used in the present invention needs to have flexibility after curing. Specifically, powder coatings such as ethylene/vinyl acetate, urethane, and polyolefin are preferred. The particle size of the powder coating is approximately 60 to 200 microns, but no particular upper or lower limit is required. The thickness of the coating formed by melting this is approximately 30 to 100 microns. If the number of powder coating layers is increased to two or three, the thickness of the coating will increase accordingly. The interface between the powder coating layer and the underlying liquid coating layer after curing is not clearly separated by heating and melting.
They are often mixed together. As a method for heating and melting the powder coating, it is appropriate to use a general hot-air drying oven for coatings, a far-infrared device, or the like. The heating conditions are such that the temperature is about 110°C to 200°C and the time is about 2 to 30 minutes. There is generally no need to heat the product to a higher temperature or for a longer period of time. If the temperature is lower than this or the heating time is shorter than this, the powder coating may not be sufficiently melted and cured.

By adjusting the heating conditions, the surface of the coating film for application of the present invention, that is, the adhesive layer 50 of the powder coating is bonded to the embossed surface 50.
1 or a flat surface 52. That is, if heating is performed at a high temperature and for a long time, a flatter surface will be obtained, and if the temperature and time are reduced, an embossed surface will be obtained. Note that, before heating and melting, excess powder coating is removed by air blowing or vacuuming, and the excess is recovered.

The powder coating is sprayed onto the surface of the liquid coating while the liquid coating is not cured.
By doing so, the powder coating material adheres well to the surface of the liquid coating material, and when both coating materials are cured, they adhere well to each other. Furthermore, as a method for spraying and adhering the powder coating onto the surface of the liquid coating, a natural fall method is economical. That is, the powder coating material is discharged from a nozzle in the form of a mist and falls onto the surface of the uncured liquid coating material. However, depending on the installation conditions of the coating device, it is also possible to apply static electricity. Furthermore, if the color of the powder coating is particularly transparent, the following advantages will occur. That is, it is impossible to mix delicate colors with powder coatings. However, in the case of liquid paints, it is easy to mix colors, and liquid paints have a major feature that powder paints do not have. In the present invention, colors are mixed in a liquid paint and a transparent adhesive layer of powder paint is formed on the top surface of the liquid paint, thereby achieving the freedom of color expression of a liquid paint and the excellent coating film performance of a powder paint. It is possible to combine the advantages of each paint.

Next, a method of using the adhesive coating film of the present invention will be described.

When applying the coating film of the present invention to an object, the separator is removed at the work site to expose the adhesive or adhesive, and then the coating film of the present invention is applied to the object and pressure-bonded. If the surface of the object is uneven, press or tap it with your fingers, palms, or a mallet wrapped in cotton. If pressure bonding is carried out carefully, the coating film of the present invention is flexible, so it adheres closely to the unevenness of the surface of the object and reproduces the surface condition well. When the surface of the object is treated with a primer, the adhesion of the coating film of the present invention to the object becomes even stronger.

Next, the effects of the present invention will be explained.

The adhesive coating film of the present invention does not cause any droplets to spread to the surrounding area during construction, and does not require the use of organic solvents that are harmful to the human body. It does not require any special equipment and is extremely easy to install at the construction site. Multiple colors can be used at the same time, and it is also weather resistant.
The coating performance, such as water resistance and chemical resistance, is comparable to that of powder coatings. That is, the coating film of the present invention combines the advantages of liquid paint and powder paint, and
It can be said to be a new film-like paint that eliminates the drawbacks of both liquid and powder paints.

[Example] Nonwoven fabric used...Product name: Unicell. Manufacturer: Teijin Co., Ltd. Product number: BT0403W. Material:
70% polyester fiber + 30% polyethylene fiber
%. Thickness: Approximately 50 microns. Color: Pure white with reflected light.
Shape: Flexible thin film with good breathability. The fibers are long and strong against tension.

Liquid paint used: Manufacturer: Nippon Paint Co., Ltd. Material: Phthalate paint for large machine painting. Color: Red. Solvent used for this: Aromatic (toluene, xylene, etc.) Powder paint used...Product name: Revazint.
Manufacturer: West Germany, Bayer AG. Material: Ethylene vinyl acetate. Paint particle size: average 100
micron. Color: Transparent.

Adhesive used: Product name: Structbond SBX-5007. Manufacturer: Mitsui Toatsu Co., Ltd. Material: Acrylic ester. Color: Transparent. Solvents used for this: ethyl acetate, toluene.

Conditions for applying liquid paint to nonwoven fabric and impregnating it...
…Dilute and stir 10 parts phthalic acid paint to 3 parts solvent, and use a spray gun to dispense this paint.
120g/min, atomizing air flow rate 200/min.

A method of spraying powder paint onto a liquid paint layer... Spray powder paint in a mist form from a nozzle to make it adhere to the uncured liquid paint, and blow off the excess with air.

Conditions and methods for heating and melting powder coatings Conditions: 140℃ for 5 minutes.

Method: Hot air thermostat.

Using the above materials and conditions, a coating film was produced according to the above manufacturing method, and the film was pasted on an iron plate and subjected to weatherometer, chemical resistance tests, heat cycle tests, etc., and the powder used in each case was A coating film with excellent durability equivalent to that obtained by applying the paint to an iron plate using the conventional method was obtained.

[Brief explanation of the drawing]

Figures 1 to 6 are cross-sectional views of the paint film formed to explain the manufacturing process of the paint film of the present invention, Figure 7 is a cross-sectional view of the paint film with the embossed surface adjusted, and Figure 8 is a cross-sectional view of the paint film with the embossed surface adjusted. FIG. 9 is a cross-sectional view of the coating film made according to the present invention, and FIG.
FIG. 0 is a cross-sectional view of a coating film formed using a conventional liquid paint. 1... Nonwoven fabric, 2... Adhesive or adhesive, 3... Separator, 4... Liquid paint layer, 5... Powder coating, 50
... Adhesive layer, 51 ... Embossed surface, 52 ... Flat surface, 6 ... Cracks, 61 ... Cracks, 62 ... Cracks generated after construction, 63 ... Concavities, 64 ... Paint film fragments, 7 ... Porous parts, 8 ... Thin Layer part, 9...thick part, A
...A coating film for pasting of the present invention, B...A coating film using a conventional liquid paint.

Claims (1)

[Claims] 1. A flexible nonwoven fabric with a thickness of approximately 30 to 200 microns, having a pressure-sensitive adhesive or adhesive layer coated and impregnated on one side, and a separator layer provided thereon, and remaining. A coating film for pasting, which has on one side a cured layer of a liquid coating material that is flexible after curing, and on top of that is an adhesive layer of a powder coating material that is flexible after curing. 2 Apply and impregnate one side of a flexible nonwoven fabric with a thickness of about 30 to 200 microns with an adhesive or adhesive.
This surface is protected with a separator, and a liquid coating material that is flexible after curing is coated and impregnated on the remaining surface of the nonwoven fabric, and during this uncured period, a powder coating material that is flexible after curing is sprayed and deposited. In the method for producing a coating film for pasting, which involves heating and melting and hardening the powder coating, the surface of the coating film formed is adjusted to a flat surface or an embossed surface by adjusting the heating conditions after the powder coating is sprayed. A method for producing a coating film for application.