JPS5838220B2 - Method for manufacturing mortar wall base material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a base material for mortar walls constructed in general wooden buildings.

Conventionally, a cement mixture mixed with rubber latex or a resin emulsion is applied to the surface of a plate-shaped object such as plywood or asbestos-cement board to form a coating film, and then the coating film is forced to dry and used as a base for mortar walls. The method of manufacturing the material belongs to the known art.

However, this method has the disadvantage that only a base material with extremely low adhesive strength (1-2 kg/i) can be obtained because the water curing reaction of the cement in the coating film of the base material is interrupted.

In addition, if you want to improve the adhesion of the paint film without performing forced drying as described above, after applying the cement mixture on the plate, leave it to cure for several weeks without depositing until it permanently hardens. This required a significant amount of time and space, resulting in extremely low productivity.

The purpose of the present invention is to eliminate the drawbacks of the prior art, and its gist is to apply rubber latex or synthetic resin emulsion to the surface of a plate-like body 2 such as plywood, hardboard, asbestos cement board, etc. , cement, and water mixture 1 is applied, dried in a drying oven 6, and further water is applied to the coating film.

The details of the configuration of the present invention will be explained below.

A waterproof layer is formed by applying an epoxy-based, urethane-based, acrylic-based, rubber-based sealer or the like to the surface or both the front and back surfaces of a plate-shaped body 2 such as plywood, handboard, particle board, asbestos cement board, etc., if necessary.

Next, a M. B. A mixture of R (methacrylic butyl rubber), latex, chloroprene latex, synthetic resin emulsion such as acetic acid vinyl emulsion, cement, general aggregates such as calcium carbonate, river sand, organic and inorganic foaming agents, water, and dispersants. The coating is applied as a layered coating film 3 while forming irregularities using a coating machine 7 such as a cut roll or a spiral roll.

Next, this plate-shaped body is forcibly heated for several minutes in a drying oven 6 using infrared rays or hot air to evaporate the moisture in the coating film 3.

As a result, the hydration reaction of the cement in the mixture of the coating film 3 is interrupted, and the cement particles, aggregates, etc. that interfere with the coating film 3 are covered with synthetic resin emulsion or latex, and the coating film 3 remains at a certain level. Next, water 4 is applied or sprinkled on the dried coating film 3 by spraying or rolling until the layered shape is maintained.

Then, as shown in FIG. 2, the plate-like bodies 2 are piled up and left to cure for about 1 to 2 weeks.

During this left curing period, the water 4 passes through the coating film of rubber latex or synthetic resin emulsion, causes a water-use reaction with the cement, and hardens, and after 1 to 2 weeks, approximately 800
1) The above is cured, and then the curing reaction gradually progresses to 2
The tenon reaches its maximum strength after ~3 years.

If water 4 is not supplied after heating the coating film 3 on the plate-shaped body 2,
Since the curing reaction of the cement is interrupted, the adhesive force inside the coating film 3 and between the coating film 3 and the plate-shaped body 2 is 1 to 2 ky/cI1.
However, when water 4 is sprayed as in the present invention, the water utilization reaction of cement progresses and hardens, so the adhesive strength between the inside of the coating film 3 and between the coating film 3 and the plate-shaped body 2 is 6~ 7 kg/
crj. That's all.

Therefore, when the base material 5 is fixed to the studs or the side frame with nails, the coating film 3 will not be chipped or peeled off.

Furthermore, even if mortar is applied thickly on this coating film 3, the mortar and coating film 3, and the coating film 3 and the plate-shaped body 2 will firmly adhere to each other, forming a wall surface that will not crack, crack, or peel off. It is possible.

Further, in the present invention, even if the base material 5 is piled up and laminated immediately after applying water 4 to the coating film 3 of the base material 5, the base material 5
The phenomenon of blocking, where the two adhere to each other, does not occur.

This is because when the upper layer of the coating film 3 is dried in the drying oven 6, an emulsion of rubber tex or sagebrush is coated with cement particles, aggregates, etc. in a film form, so water 4 is not applied. Even if the rubber latex or synthetic resin coating is formed into a film, it will not melt or soften.

Moreover, the water 4 easily permeates into the cement and aggregate particles through the gaps between the filmed rubber latex or synthetic resin emulsion particles, and the water curing reaction of cement proceeds inside the rubber latex or synthetic resin coating.

In other words, the rubber latex or synthetic resin coating does not dissolve and soften in water, but it has the property of allowing water to pass through.

As described above, the present invention has the effect that the base material 5 having high adhesive strength between the plate-shaped body 2 and the coating film 3 and the strength of the coating film 3 can be obtained by a simple process of applying water.

Next, an example of the method for manufacturing the mortar wall base material 5 of the present invention will be described.

Example 9 MBR latex 50 parts cement on the surface of lauan plywood 2 of m/m thickness, type I, 900 x 1800 m/m
150 parts calcium carbonate
100 parts river sand 50 parts methylcellulose 40 parts water
20 part powder
Mixture 1 of synthetic resin and cement etc. consisting of 0.4 parts was mixed with a mouth coater 7 at 1z00g/rr? Apply.

The coating roll of the roll coater at this time had a hardness of 40, and the roll surface had a diamond-shaped uneven pattern with grooves of 3 m/m in depth and 6 m/m in width, with groove spacing of 10 m/m, and an intersecting angle of 60°. It is formed.

Next, this plywood is dried for 5 minutes using a hot air infrared dryer 6 at 150 to 180°C.

After that, immediately after applying 50 g/m'' of Water 4, the O

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the process of the method of the present invention, and FIG. 2 is an explanatory diagram of the process of depositing and curing the coating film after spraying water on it. Explanation of symbols, 1... Cement mixture, 2...
... Plate-shaped body, 3 ... Paint film, 4 ... Water, 5 ... Base material, 6 ... Drying oven, 7.
...Painting machine.

Claims (1)

[Claims] 1. A cement mixture 1 is prepared by mixing cement, rubber latex or synthetic resin emulsion, water, and general aggregate, and the cement mixture 1 is applied to the surface of a plate-shaped body 2 such as plywood or asbestos cement board. After coating to form a single layer of coating film 3, the coating film 3 is rapidly heated and dried, and further thereafter, water 4 is applied to the surface of the coating film 3 to continue the curing reaction of the cement mixture 1. A method for producing a base material for a mortar wall, characterized by: