JPS598189B2 - Exterior spray finishing roller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an exterior spray finishing roller, and more particularly to one using a special hard fiber molded body as the roller body.

Conventionally, a highly viscous material such as cement or synthetic resin is sprayed on the exterior of building wall materials, and then a finishing roller is used to form a pattern or create a dent.

The surface is finished by adjusting the convexities. Conventionally, the rollers used are porous rollers made of vinyl chloride, synthetic rubber, or synthetic resin that have no microscopic voids and are hardened with adhesives, etc., but rollers are made of highly viscous volatile materials. To prevent it from sticking, the roller must be soaked in kerosene or its emulsified liquid before use. Moreover, this happens frequently and significantly reduces work efficiency. The above-mentioned porous roller has the advantage of being able to prevent the adhesion of highly viscous and viscous substances by simply applying ordinary water instead of kerosene or emulsified liquid, but it requires frequent application of water and has a short service life. ,3
The purpose of the present invention is to eliminate the drawbacks of the above-mentioned conventional technology, make it lightweight and strong, increase the amount of water retained, and minimize the frequency of applying water to the roller. The objective is to provide a roller that facilitates exterior finishing.

The present invention uses a crystalline polypropylene component having a fiber cross-sectional circumference of 15 to 40%, a melting point lower than the crystalline polypropylene component by 20°C or more, and a fiber cross-sectional circumference of 85 to 60%.
% of a polyolefin polymer component, and a porous fiber aggregate containing at least 50% of parallel composite fibers of 1 to 100 deniers as composite components, and thermal fusion of the polyolefin polymer component. This is a roller for exterior spray finishing, characterized in that a cylindrical fiber molded body stabilized by is used as the roller body. Examples of the polyolefin polymer component (hereinafter sometimes referred to as low melting point component) include various polyethylenes, low molecular weight polypropylene, atactic polypropylene, and the like.

Fig. 1 is an overall view of an example of the finishing roller of the present invention, and Fig. 2 shows the main body of the roller.

In the figure, 1 indicates the roller body. As mentioned above, the roller body used in the present invention is very strongly stabilized by thermal fusion mainly between the low melting point components of the composite fibers.
Although it is porous and lightweight, it has high hardness.

In addition to the above-mentioned composite fibers, other fibers can also be used in combination as the fibers constituting the roller body. It is desirable to use at least 50% composite fiber to prevent fluffing on the surface of the roller body.The roller body needs an appropriate pore size to retain moisture, while maintaining high hardness as the roller body. A certain level of fiber filling is required, and it is desirable that the surface portion form lines as much as possible.

Therefore, the porosity of the fiber molded body is 50 to 75%, preferably 55 to 70%, and the fiber thickness is 1 to 100 d, preferably 1 to 30 d. Both synthetic fibers and natural fibers can be used as other fibers to be mixed.
Water-absorbing fibers are preferred. A method for making the finishing roller of the present invention will be explained.

The parallel type composite fiber uses crystalline polypropylene and polyolefin polymer as raw materials for each component, and has a float rate ratio of 1:1.5 to 1:5 (preferably 1:2.0).
An undrawn yarn obtained by a conventionally known parallel melt spinning method is heated at a temperature below the melting point of the low melting point component and 20°C lower than the melting point so that the ratio is 1.5 to 4.0). Obtained by stretching 8 times. This product has moderate crimp of 12 peaks/25 m, and shows almost no latent crimp even after heat treatment to cause fusion, so the dimensions and shape of the molded product are extremely stable. This is what I did. A fiber aggregate containing at least 50% of this composite fiber is filled into a mold for making a hollow cylinder, for example, so as to have a desired porosity, and then heat treated.
For dry heat, a suitable temperature is 10 to 20°C higher than the melting point of the low melting point component, and for wet heat, a temperature 30 to 40°C higher. The roller body thus obtained is combined with necessary parts to form a finishing roller. Example Commercially available crystalline polypropylene was used as the first component, and low-pressure polyethylene with a melting point of 132°C was used as the second component, with a weight blending ratio of the two of 50:501 and a spinning melt flow rate of 1:4.
．． A parallel composite fiber with a single filament denier of 18 d obtained by parallel melt spinning at 0 and drawn 4 times at 115°C was
70% cut into wn and viscose rayon (
7d1 fiber length 64~)30% is supplied to a roller card, and the uniformly mixed web is formed into a web with an outer diameter of 70% and an inner diameter of 35%.
A cylindrical pipe form with a length of 200X and a hollow part of 185
After filling with R, it was placed in a pressure cooker and steam was applied to 2.5 Kf/d, followed by heat treatment for 10 minutes to obtain a fiber molded body with a porosity of 65%.

This is used as the roller body to produce a finishing roller.
When used for finishing soil after spraying a cement-based high-viscosity substance, the frequency of water use was reduced to about one-third of that of a porous roller made of synthetic resin hardened with adhesive.
The morphology of the roller remained stable even after it was used for the above finishing.

[Brief explanation of drawings]

FIG. 1 is an overall view of an example of the finishing roller of the present invention, and FIG. 2 shows the main body of the roller.

Claims (1)

[Claims] 1. A crystalline polypropylene component with a fiber cross-sectional circumference of 15 to 40%, and a polyolefin polymer component whose contact point is 20° C. or more lower than the crystalline polypropylene component and a fiber cross-sectional circumference of 85 to 60%. , each containing at least 50 parallel composite fibers of 1 to 100 denier as composite components.
Exterior spray finish characterized in that a cylindrical fiber molded body made of a porous fiber aggregate containing % or more and stabilized by thermal fusion of the polyolefin polymer component is used as the roller body. roller.