JPS63159244A - Double-layer extrusion-formed silicate-lime base formed article - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Application Field] The present invention relates to a multi-layer extrusion-molded silicic acid-calcareous molded product that does not contain asbestos in one surface layer, and a method for producing the same, and more specifically, The layer does not contain asbestos and is non-combustible, fire resistant and 1 dimensionally stable. In particular, the present invention relates to a multilayer extrusion-molded siliceous-calcareous molded product useful for flooring materials, etc., and a method for producing the same.

[Prior Art] Conventionally, products made by extruding cement or calcium silicate-based hydraulic substances have been developed and often used as interior and exterior materials for buildings. These products are often used as interior and exterior materials for construction because they are lightweight, have excellent heat insulation effects, are noncombustible, have excellent fire resistance, and have excellent weight resistance. Items that wear out during use, such as flooring materials, have the possibility of scattering asbestos, which is a health and hygiene problem.

However, as an inorganic cured product, it is necessary to reinforce the tensile strength of the molded product with miscellaneous substances. for that,
The inclusion of asbestos for reinforcement was deemed unnecessary.

[Problems to be Solved by the Invention] The present invention was developed as a result of intensive research to solve the problems of conventional silicic acid-calcareous extruded products as described below. The object of the present invention is to provide a silicic acid-calcareous extrusion molded product that is free of

Accordingly, one object of the present invention is to provide an inorganic extrusion molded article made of conventional silicic acid-calcareous materials and useful for non-polluting flooring materials.

[Means for Solving the Problems] The gist of the present invention is as follows: 1. A surface layer made of a silicate-calcareous hydraulic inorganic material such as cement that does not contain asbestos;
Multi-layer extruded silicic material that contains asbestos and/or other reinforcing fibers and has a structure in which a silicic-calcareous hydraulic material such as cement is extruded together as a base layer, and one surface layer does not contain asbestos. -It is a calcareous molded product. The manufacturing method is 1. A siliceous-calcareous hydraulic material base such as cement containing asbestos and/or other reinforcing fibers is placed in the extruder, and a siliceous-calcareous hydraulic material base such as cement containing no asbestos is placed in the sub-extruder. A calcareous hydraulic inorganic material matrix is introduced, and the asbestos-free matrix is press-fitted from a sub-extruder into a region near the tip of the mouthpiece after the main extruder.

[Effect] According to the invention, by a special extrusion method.

A siliceous-calcareous molded article containing no asbestos in the surface layer is obtained. A multi-layer extruded siliceous-calcareous molded article is obtained in which the asbestos content harmful to health is removed from the surface layer, and this can provide a useful material for products such as flooring.

The siliceous-calcareous hydraulic base used in the present invention is mainly made of cement, hydraulic gypsum, a mixture of calcareous raw materials and silicic raw materials, and contains a reinforcing fiber substance,
Depending on the purpose, reinforcing fibers, light IT materials, hardening accelerators, etc. are added to this raw material, and a mixed raw material is kneaded with water.

1 Cement paste is usually used for this purpose. Also,
If desired, white cement or the like may be used for aesthetic purposes.

On the other hand, the material contained for reinforcing the multilayer extrusion molded product of the present invention is usually asbestos fiber.

The base layer of the present invention is usually reinforced with asbestos fibers, but the surface layer is reinforced with fibers other than asbestos, if necessary. It is suitable to use glass fiber, carbon fiber, etc. as other reinforcing fiber materials. Furthermore, organic fibers such as polyamide, polypropylene, polyester, and vinylon, as well as bulbs, etc. can be used. Furthermore, in order to complement the characteristics of these fibers, a combination of two or more types of fibers can be used.

However, in the surface layer of the multilayer extrusion molded product of the present invention.

Must be free of asbestos.

That is, it is an extrusion-molded silicic acid-calcareous molded product having a double structure, and it is possible to produce an extrusion-molded product having a structure in which asbestos is removed from the reinforcing fibers in one surface layer.

Therefore, the molded product of the present invention is a silicic-calcareous extrusion molded product that includes a surface layer 2 having the structure shown in FIG. 1 and a base layer 3 that may also contain asbestos, and has a hollow portion 4. 6 The boundary between the surface layer 2 and the base layer 3 is usually a flat surface as shown in the figure, which provides sufficient adhesion strength, but it can also be made into an uneven surface to increase the adhesion strength.

Furthermore, the strength of the molded article can be improved by incorporating a thermoplastic resin into the base composition of the surface layer of the present invention. Therefore, by incorporating a resin into one surface layer, it is possible to obtain a surface layer with an excellent appearance and to produce products that can omit post-treatment steps.

Regarding the production of the multilayer extrusion molded product of the present invention, the materials constituting the silicic acid-calcareous molded product are as follows.

Silicic acid-calcareous hydraulic substance and reinforcement [1, but not limited to, coagulants, hardening aids, viscosity agents, 9 surface active agents, to improve the efficiency of extrusion molding operations;
Plasticizers and the like can be added. Furthermore, organic polymers may be added to impart toughness and wear resistance to one surface layer, and pigments, white cement, and other materials may be included to improve cosmetic performance.

Next, the multi-layer extruded cement molded article and the manufacturing method thereof according to the present invention will be described with reference to two examples, but the present invention is not limited to the examples.

[Example 80 parts by weight of ordinary Portland cement, 20 parts by weight of chrysotile asbestos, 0.8 parts by weight of methylcellulose, 25 parts by weight of water
The base material obtained by kneading the weight parts is put into the main extrusion 418 as shown in Fig. 2.3, and is mixed with ordinary Portland cement 97.
A base material obtained by kneading 3 parts of heavy carbon fiber, 8 parts by weight of methylcellulose O0, and 20 parts by weight of water was put into the sub-extruder 7,
Pass the product through the cap 5 with a thickness of 60 mm and a width of 600 mm.

The molded body 1 having five hollow holes was extruded. The above-mentioned base material 9 is extruded by the screw 8 of the main extruder, and is combined with the base material that has passed through the connecting pipe 6 from the sub-extruder 7 at the eyelet 5, and the base material 9 is extruded through the hollow holes 5 to 9 with the center f4 as shown in the figure. A multilayer extruded cement molded article 1 (FIG. 1) having the following properties was obtained.

This multilayer extruded cement molded product 1 consists of a surface layer 2 that does not contain asbestos and a base Ng 3.

The asbestos fiber used was chrysotile. Also,
The dimensions of the manufactured molded body were 4 m in length.

It is 60cm wide and 60mm thick. The thickness of the surface layer is approximately 2-5 mm.

A product was obtained by molding, primary curing and autoclave curing as described above.

[Effects of the Invention] The multilayer extrusion-molded silicic acid-calcareous molded product and the method for producing the same of the present invention are as follows.

First, it is lightweight, has excellent insulation effects, is nonflammable, and has fire resistance.
In addition, it is possible to produce an improved molded product for flooring that does not scatter asbestos even if the surface is abraded.

Second, by using white cement and pigment in the composition that forms one surface layer, it is possible to produce products with excellent appearance.

Thirdly, multi-layer extruded cement molded products can be produced by incorporating resin in order to improve wear resistance.

Fourthly, it is possible to provide a molded product with excellent cosmetic properties as a building material.

Fifth, technical effects have been obtained, such as the ability to provide multilayer extruded silicic-calcareous molded articles that can omit the need for subsequent coating application after molding.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a silicic acid-calcareous multilayer extrusion molded product of the present invention. FIG. 2 is a front view of an apparatus used for producing a silicic acid-calcareous multilayer extrusion molded product of the present invention. FIG. 3 shows the silicon Iv of the present invention cut along the line A-A of No. 211:1! FIG. 2 is a sectional view of an apparatus used for manufacturing a calcareous multilayer extruded product. June 13, 1988 Commissioner of the Patent Office Kuro Person making the amendment Relationship to the case Address of applicant: 5-1 Marunouchi-chome, Chiyoda-ku, Tokyo Representative: Masaya Fujimura 4, Mitsubishi Mining Cement Co., Ltd. Address of agent: 1 Kanda-Suda-cho, Chiyoda-ku, Tokyo 101 chome 2-5
, Number of inventions increased by amendment 06. Subject of amendment (1) The statement in [Claims] of the specification is corrected as shown in the attached sheet. (Correct "not approved" on page 3, line 4 of the specification to "essential". C3) Correct "near the tip" on page 4, line 6 of the above description to "near the tip." (Correction of [Reinforcement of molded products] in No. 500, line 6 of Shungen 1 to [Reinforcement of molded products]. and [Multilayer extrusion molded cement molded product] in the box 4th to 5th line of the same page and the 4th line of page 9 will be revised to [Multilayer extrusion molded product]. (6) IE, page 9, page 9 of the same page. [Multilayer extruded siliceous-calcareous molded product] in lines 10 to 10 is corrected to [silicic acid-calcareous multilayer extrusion molded product]. (7) [Abrasion resistance] in line 3 of page 9, same as above. ] has been revised to [Abrasion resistance] [Claims (1) A surface layer made of a siliceous-calcareous hydraulic inorganic material such as cement that does not contain asbestos or/and other asbestos. A multi-layer extruded silicic material containing reinforcing fibers and having a structure in which a silicic acid-calcareous hydraulic material such as cement is used as a base layer and extruded together, and the surface layer does not contain asbestos. Calcareous molded product. (1) A siliceous-calcareous hydraulic material base such as Hyment containing asbestos and/or other reinforcing am is put into the main extruder and press-fitted into the mouthpiece, and the sub-extruder contains 9 asbestos. A silicate-calcareous hydraulic inorganic material base such as cement free of asbestos is put in the base, and the base free of asbestos is press-fitted from a sub-extruder into a part near the tip of the 11 metal part after the main extruder. A method for producing a multi-layer extrusion-molded silicic acid-calcareous molded product that does not contain asbestos in its surface layer.

Claims (2)

[Claims] (1) The surface layer is a silicic-calcareous hydraulic inorganic material such as cement that does not contain asbestos, and the base layer is a silicic-calcareous hydraulic material such as cement, which contains asbestos and/or other reinforcing fibers. 1. A multi-layer extrusion-molded siliceous-calcareous molded article having a structure in which the surface layer does not contain asbestos. (2) A silicate-calcareous hydraulic material base such as cement containing asbestos and/or other reinforcing fibers is put into the main extruder and press-fitted into the mouthpiece, and cement, etc. that does not contain asbestos is put into the sub-extruder. A silicate-calcareous hydraulic inorganic material matrix is introduced into the surface layer, and the asbestos-free matrix is press-fitted from a sub-extruder into a region near the tip of the mouthpiece after the main extruder. A method for producing a multi-layer extrusion-molded silicic acid-calcareous molded product.