JPS6055473B2 - Forming method of foamed slag board - Google Patents

Description

[Detailed Description of the Invention] This invention uses slag, which is an inorganic material that is generated in large quantities, as the main raw material for aggregate, and this aggregate is made into slag that is integrally coagulated with a resin material such as vinyl chloride resin. When forming a board, foamed voids are formed between the aggregate composition particles, and the composition particles are tightly attached to each other with a coating of mixed resin, in order to strengthen the adhesive force between the particles. At the same time, the amount of resin material used is kept to the minimum necessary to bring the properties of the molded plate as close as possible to those of a pure non-alloyed plate.

Conventionally, this type of inorganic board had poor molding properties due to the use of cement, plaster, etc. as the material for the cover.
This made it difficult to mold and provide lightweight plates. Also, in such a pure inorganic plate,
11 』L-V1 Muroke {Le←MuL,~YaL゛→１'
, J, 4 pa, L, and the construction characteristics such as cutting, drilling, and nailing were extremely poor. In contrast, with inorganic boards that are provided by mixing resin adhesive into inorganic powder and molding, it is of course necessary to completely fill the gaps between aggregates with adhesive resin. Therefore, the amount of resin used was inevitably large, and this functioned as a hard resin molded plate rather than as an inorganic plate.

The method for forming a slag foam board according to the present invention was devised especially in view of the inconveniences of the conventional inorganic boards. A resin film such as vinyl chloride attached to the aggregate surface is used to reliably connect the aggregates, and the gap other than the part of the film used for this connection is made into a foam gap.
By eliminating the possibility of unnecessary resin material intervening between the aggregates, it is possible to ensure the same performance as an almost pure inorganic board, while also reducing the weight of the board itself and improving its bending properties. This is particularly intended to promote impact resistance.

To explain in detail one embodiment of a typical manufacturing method of a foamed slag board according to the present invention, it is possible to use a resin such as vinyl chloride whose mechanical properties such as tensile strength are relatively unlikely to be damaged by foaming. After adding a solvent such as toluene at 15-30%, typically around 20% to the raw material and stirring it, dry slag powder, often 50-150%, is added to the resin material at 15-30%. 6 slag powder with particle size of mesh size
0 to 80%, typically equivalent to 80%, and in addition, 2 to 4% of a blowing agent, ideally 4% to the mixture of both materials.
% foaming agent was mixed in, and after sufficient kneading, it was filled into a mold and hot-breathed at a temperature of 150 to 180℃/3 powder to obtain a foamed slag plate. be.

Note that it was also separately planned to carry out such foaming treatment several times, and contraction commensurate with the amount of slag mixed in was planned in the foaming stage.

Next, as the solvent used in the above, methyl alcohol, acetone, benzene, trichlene, formic acid, or tetrahydrofuran are selected as appropriate depending on the characteristics of the resin material used, and carbonic acid is used as the blowing agent. Soda, freon, propane, butane, or pentane are selectively used. In addition, it is planned to mix gypsum or cement mixed with talc together with the mixed aggregate, and the amount of these inorganic materials mixed together with the slag powder remains at 60 to 80% as a whole. With this in mind, it has become possible to provide a foam board that has structural integrity, mechanical properties, heat insulation, sound insulation functions, etc. that are different from foam boards made only of slag.

In particular, with the intention of changing the color tone and mass feel unique to the slag board, it was planned to mix in a predetermined proportion of gypsum powder or cement powder. The foamed slag board according to the present invention has the characteristic structure described above, and a resin film 2 such as vinyl chloride is reliably laminated on the surface of the slag particles 1 to 1 constituting the board, and this resin film 2 A series of adhesives that continuously exhibit a predetermined adhesive strength, and
The gaps between the particles 1 to 1 form a complete foamed membrane 3. This particle structure was even more noticeable when aggregates with foaming properties such as calcium carbonate were mixed in and used as secondary aggregates4.
The carbon dioxide gas generated during heating ensures that voids 3 are formed between the particles 1 and 1, and the generated carbon dioxide gas also ensures that the resin material forms a coating 2 with a generally uniform thickness. It is press-fitted to the circumferential surface of the

In the foamed structure of the foamed slag board, particles 1 to 1
are completely integrated with the coating 2, and the coating 2 forms a honeycomb-like structure, giving the plate its own unique impact resistance and bending strength properties, which are different from the conventional inorganic plates. It promises good mechanical properties not found in other countries.

Furthermore, even if the particles 1 are calcium powder or the like as a sub-aggregate, it is assumed that these particles 1 are reliably isolated from the outside and do not induce moisture and the molded plate collapses in water. Even in the event of rain, deterioration in strength is reliably prevented, making it a completely water-resistant structural board.

Furthermore, by using the foamed structure having the coating 2 mentioned above, the insulation and sound insulation properties of the board are said to be particularly good compared to the usual slag board; By omitting the use of resin materials due to the two-structure structure, the non-flammable function is further ensured, and the generation of harmful gases etc. during heating is suppressed as much as possible.

In the present invention, the characteristics of the slag, which is usually produced and produced as furnace slag, as an aggregate, particularly good stainability with resin materials, appropriate hardness and selectivity of particle size, and low cost as a raw material. The aim is to provide a foamed slag board that is particularly effective for slag disposal, focusing on the characteristics such as stable supply of slag, and aiming for the effective use of slag. The present invention provides a slag board that is particularly excellent in construction properties such as thermal bonding and nailing, and in heat insulation properties.

[Brief explanation of the drawing]

The accompanying drawing is an enlarged sectional view of a main part of a typical embodiment of a foamed slag plate provided by the molding method according to the present invention. In the figure, 1...particles, 2...film, 3
...This showed foaming voids.

Claims (1)

[Claims] 1 60-80% of slag powder and 2-4% of a blowing agent are added to 15-30% of a synthetic resin material such as vinyl chloride to which 15-30% of a solvent such as toluene has been added, followed by kneading and heating. The foamed slag plate is a foamed slag plate in which the surface of the slag powder particles 1 is covered with a foamed film 2 of the synthetic resin material, and the particles 1 to 1 are connected to each other while maintaining foamed voids 3. A method for forming a foamed slag board, which is characterized by: