JP3233740B2 - Washing sheet - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to, those related to the sheet for washed out, which is used to form the washing exit surface of the concrete products.

[0002]

2. Description of the Related Art To explain the current state of the washing technology, there are two types of detergents, a set retarder type and an alkali swelling type. These detergents are processed into paper, paint, liquid and the like.

[0003] Japanese Patent Publication No. 4-41884 discloses a washing paper formed into a paper. This is a setting retarder paper obtained by applying or impregnating a raw material for washing (setting retarder) to paper.

[0004] Then, the set retarder paper is attached to the inner surface of the form, and the concrete product is centrifugally formed. A jet water stream is applied to the surface of the concrete product which has been in contact with the set retarder paper to remove the cement mortar near the surface. It is to remove and wash out the coarse aggregate inside.

[0005]

The setting retarder paper comprises:
For example, it is easy to handle because it can be attached to the inner surface of the mold with double-sided tape at the site, but unevenness in the penetration depth tends to occur at the stage where the setting retarder impregnated in the paper permeates the fresh concrete In addition, there is a problem that the setting retarder penetrates to the back side of the coarse aggregate and causes the adhesion of the coarse aggregate to decrease. Therefore, it is difficult to obtain a uniform washing surface.

[0006] The present invention has been made in view of the above problems, it is an object to provide a sheet for out washing, which can obtain uniform washing exit surface in concrete products that are used.

[0007]

According to a first aspect of the present invention, there is provided a base material, an adhesive applied to the base material,
With alkaline swelling type detergent powder fixed on the surface of the detergent
And Bei, alkali swellable-type washing polishes powder, a powder of core,
A washing sheet composed of an alkali swelling type washing agent adhered and hardened on the surface of the core powder.

According to a second aspect of the present invention, there is provided a base material,
The adhesive applied to the material and the adhesive fixed inside the adhesive
Alkaline swelling-type detergent powder, wherein the alkali-swelling-type detergent powder is composed of a core powder and an alkali-swelling-type detergent adhered and hardened on the surface of the core powder. Washing sheet.

[0009]

According to the first aspect of the present invention, the base material is provided on the inner surface of the formwork.
If you attach it with double-sided tape, the adhesive surface of the base material
The alkaline swelling type detergent powder fixed on the
Softens by absorbing alkaline water on the installed concrete surface
Swells and prevents concrete from solidifying. alkali
The swelling type detergent powder fixes the alkali swelling type detergent on the surface of the adhesive on the base material via the core powder.

[0010] According to a second aspect of the present invention, the adhesive film is formed of an adhesive.
Cover the swelling-type detergent powder and keep this powder from external force.
Protect. On the other hand, the adhesive cured by drying was poured
While absorbing moisture from concrete, it softens
Potassium swelling type detergent powder also absorbs alkaline water and softens and swells
I do. The alkali swelling type detergent powder fixes the alkali swelling type detergent on the surface of the adhesive on the base material via the core powder.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the invention described in claim 1 will be described with reference to the first embodiment shown in FIGS. 1 and 2, and the invention described in claim 2 will be shown in FIGS. 3 and 4. This will be described in detail with reference to the second embodiment.

First Embodiment First, an example of the structure of a washing sheet according to the first embodiment of the present invention will be described with reference to FIG. 1. A base material 1 such as paper, cloth or a control panel, and the base material 1 And an alkali swelling-type detergent powder 3 uniformly integrated on the surface of the adhesive 2. This alkali swelling type detergent powder 3 is produced as follows.

A. A core powder 3a is prepared. As the kind of the core powder 3a, silica sand, fly ash, slag fine powder, silica fume, or the like is used.

B. Alkaline swelling-type detergent 3b prepared by copolymerizing acrylic acid and its modified product with polyester resin as the main component is added in a weight ratio of 1 to 50% with respect to core powder 3a.
(For example, 1-40% for silica sand)
Mix with 3a and stir with mixer.

C. The mixture is placed in a drying oven and dried, and the alkali swelling type detergent 3b is completely adhered and hardened on the surface of the powder 3a as a core. This drying may be natural drying.

D. Detergent powder 3 completely dried in a drying oven
Since the cores adhere to each other due to the adhesive force of the resin on the surface, the cores are loosely separated using a low-speed mixer or a tamping mixer.

As described above, the detergent powder 3 having the alkali swelling type detergent 3b adhered to the surface of the core powder 3a is prepared. As another manufacturing method, a spray gun is used in the drying step (c). The detergent powder 3 can also be produced by spraying the alkaline swelling type detergent into a drying furnace using the above method and causing the alkali swelling type detergent to flash on the surface of the core powder.

Next, a method of manufacturing the washing sheet shown in FIG. 1 will be described with reference to FIG.

As described above, the alkali swelling type detergent 3b is attached and hardened on the surface of the powder 3a serving as a core such as silica sand,
The alkali swelling type detergent powder 3 is produced.

An adhesive 2 is uniformly applied to a base material 1 such as sandpaper paper.

The detergent powder 3 on the upper surface of the adhesive 2
At a density of about 700 g / m ² as a standard.

When the base material 1 is placed in a drying oven at 40 to 60 ° C., and the adhesive 2 is dried and hardened in the drying furnace, the particles of the alkali swelling type detergent powder 3 are adhered to the adhesive surface of the base material 1. The fixed washing sheet is completed.

Next, the operation of the washing sheet shown in FIG. 1 will be described. When the base material 1 is adhered to the inner surface of the mold with a double-sided tape or the like, the alkali swelling type detergent powder 3 fixed on the pressure-sensitive adhesive surface of the base material 1 is transferred to the concrete surface cast in the mold. Absorbs alkaline water and softens and swells to prevent solidification of the concrete surface.

As the adhesive 2, various materials such as starch, synthetic resin and epoxy were tested, and there was no difference in the washing performance with any of the adhesives.

Since the alkaline swelling type detergent powder 3 is evenly spread and fixed on the adhesive surface on the base material 1, it is possible to uniformly absorb water from the surface to be washed and to make the surface to be washed uniform. can do.

In particular, the alkali swelling type detergent 3b does not enter the back side of the coarse aggregate unlike the setting retarder, so that the adhesion performance of the coarse aggregate can be improved. And a uniform washing surface is obtained without being limited by concrete strength.

The alkaline swelling-type detergent powder 3 had no expiration date and could be washed out even with the alkali-swelling-type detergent powder having silica sand as a core and stored for 3 years. A conventional setting retarder has an expiration date (expiration period).

There is no difference in the washing performance even when the adhesive 2 is made of epoxy to cope with rainfall. Conventional set retarder papers are not suitable for use in outdoor work during rainfall because the set retarder spills out.

(Embodiment 2) First, an example of the structure of a washing sheet according to the second embodiment of the present invention will be described with reference to FIG. 3. A base material 1 such as paper, cloth, or a control panel, and the base material 1 Adhesive 2 applied to
And an alkali swelling type detergent powder 3 mixed in the adhesive. This detergent powder 3 is also a product in which the alkali swelling type detergent 3b is attached and hardened to the surface of the core powder 3a.

Next, a method of manufacturing the washing sheet shown in FIG. 3 will be described with reference to FIG.

As described above, the detergent powder 3 is prepared by adhering and hardening the alkali swelling type detergent 3b on the surface of the core powder 3a such as silica sand.

A completely cured and dried alkali swelling type detergent powder 3 and an adhesive (for example, a modified vinyl resin) 2 are
Mix and stir at a weight ratio of 1: 1 or 2: 1.
In this mixing and stirring step, the alkali swelling type detergent powder is uniformly mixed into the adhesive.

A base material (paper) 1 is prepared, and a mixture of the detergent powder 3 and the adhesive 2 prepared as described above is uniformly applied to the base material 1. The application method used a brush, a spatula, etc. in the trial production stage.

The above-mentioned base material 1 is placed in a drying oven at 40 to 60 ° C., and the adhesive 2 is dried and hardened. At this time, when the adhesive 2 shrinks and hardens by drying, a washing sheet in which the particles of the alkali swelling type detergent powder 3 are fixed in the adhesive of the base material 1 is completed.

Next, the operation of the washing sheet shown in FIG. 3 will be described. The surface film 2a of the adhesive 2 covers the alkali swelling type detergent powder 3, and protects the powder 3 from external force (such as impact, ironing, scratching, rainfall). On the other hand, the adhesive 2 hardened by drying absorbs moisture from the poured concrete and softens, and the alkali swelling type detergent powder 3 also absorbs alkaline water on the surface of the concrete poured into the mold. Softens and swells to prevent solidification of the concrete surface.

The alkaline swelling type detergent powder 3 shown in Example 1 and Example 2 has powder 3a such as silica sand, fly ash or slag fine powder as a nucleus, and the surface thereof is washed with the alkali swelling type washing powder. The washing agent powder 3 is not limited to this double structure powder, but is composed of, for example, a polyester resin material, acrylic acid and a modified product thereof. A fine powder consisting of only the alkali swelling type detergent 3b may be used.

[0037]

According to the first aspect of the present invention, on the base material
Alkali swelling type detergent powder fixed on the adhesive surface of
The surface to be washed out of concrete is uniformly treated to
Can be made uniform. In particular, since an appropriate amount of alkaline swelling type detergent can be firmly and uniformly fixed to the base material via the core powder ,
Uniform processing can be ensured .

According to the invention described in claim 2 , according to claim 1
In addition to obtaining the same effect as the invention of the above, the alkali swelling type washing
Dispensing powder is protected by adhesive covering the entire surface
From external forces acting on the washing sheet surface during on-site work.
The detergent powder does not fall off due to external force.
Which is less likely. In particular, since an appropriate amount of alkaline swelling type detergent can be firmly and uniformly fixed to the base material via the core powder , uniform treatment of the surface to be washed out of concrete is ensured.
I can do it .

[Brief description of the drawings]

FIG. 1 is a sectional view showing one embodiment of a washing sheet according to the first aspect of the present invention.

2 is a process diagram showing the manufacturing method of the sheet for washed out shown in Figure 1.

FIG. 3 is a sectional view showing one embodiment of a washing sheet according to the invention of claim 2 ;

FIG. 4 is a process chart showing a method for manufacturing the washing sheet shown in FIG . 3 ;

[Explanation of symbols]

 1 Base material 2 Adhesive 3 Alkali swelling type detergent powder 3a Core powder 3b Alkali swelling type detergent

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI // B28B 21/96 B28B 21/96

Claims (2)

(57) [Claims] And 1. A base material, this and the base material to be coated adhesive, alkali swelling type washout agent powder which is fixed on the surface of the adhesive
; And a youngest, alkali swellable-type washing polishes powder shall be the characteristics and powder as a core, that is constituted by the attached cured alkali swelling type washout agent to the surface of the powder of this core Washing sheet. 2. A base material, and the adhesive applied to the base material, an alkali swelling type washout agent powder which is fixed to the inside of the adhesive
; And a youngest, alkali swellable-type washing polishes powder shall be the characteristics and powder as a core, that is constituted by the attached cured alkali swelling type washout agent to the surface of the powder of this core Washing sheet.