laminated body

Abstract

The present invention provides a novel laminate (heat-resistant protective material) using a thermally expandable material, which is reduced in weight without deteriorating thinness at the initial stage, thermal expandability and protection performance against heat. The present invention specifically provides a thermally expandable laminate which is characterized in that: (1) the laminate is obtained by laminating at least a thermal expansion layer (A) and a thermal expansion layer (B); (2) the thermal expansion layer (A) contains a binder, a flame retardant, a foaming agent and a carbonization agent, and in cases where the thermal expansion layer (A) additionally contains an inorganic light-weight powder (A), the content of the inorganic light-weight powder (A) in the thermal expansion layer (A) is less than 5% by volume; (3) the thermal expansion layer (B) contains a binder, a flame retardant, a foaming agent, a carbonization agent and an inorganic light-weight powder (B), and the content of the inorganic light-weight powder (B) in the thermal expansion layer (B) is 5-70% by volume; and (4) the inorganic light-weight powder (A) and the inorganic light-weight powder (B) have a bulk density of 0.1-2.0 g / cm3.

Description

technical field [0001] The present invention relates to a laminate having excellent heat-resistant protection properties. The laminates of the present invention are useful for protecting various substrates in architectural structures at elevated temperatures. Background technique [0002] When building structures are exposed to high temperatures caused by fire, etc., the physical strength of various base materials such as columns, beams, floors, roofs, walls, etc. may drop drastically. In response to this problem, various methods have been proposed to improve heat resistance by covering various base materials of building structures with a heat-resistant protective material. [0003] As heat-resistant protective materials, for example, materials containing inorganic lightweight aggregates such as rock wool, perlite, and vermiculite, and cement are widely known. However, when using the heat-resistant protective material of the above materials, in order to obtain sufficient h...

AI Technical Summary

Problems solved by technology

However, when using the heat-resistant protective material of the above materials, in order to obtain sufficient heat-resistant performance, it is necessary to apply a coating with a thickness of about 20 to 50 mm.

Therefore, a large amount of material is required at the time of construction, the workload increases, and there is a problem that it takes a long time to dry

In addition, since the coating is thick, there are problems in that it is not conducive to effective use of space and that it has a sense of oppression in appearance

[0010] However, the heat-expandable materials described in Patent Documents 1, 2, etc. have a high weight, and it is desired to reduce the weight of the heat-expandable materials in consideration of work efficiency during construction, loads on building structures, etc.

Therefore, for example, it has been conceived to reduce the weight by mixing light-weight powders. However, once light-weight powders are mixed with the heat-expandable materials described in Patent Documents 1 and 2, the weight per unit volume decreases, but the thermal expansion is suppressed. Therefore, it is difficult to obtain excellent heat protection performance

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