JPH072559A - Fireproof / heat insulating composition - Google Patents

Abstract

PURPOSE:To obtain a lightweight product excellent in refractoriness and heat insulation without requiring burning and processing (cutting) by blending a specified ratio of a light-weight aggregate, a refractory plastic clay and a binder, press-molding the resultant mixture and drying it. CONSTITUTION:This refractory and heat-insulating material is obtained by blending 10 to 50wt.% 1ightweight aggregate, 50 to 90wt.% refractory plastic clay and 0.1 to 10wt.% binder, press-molding the resultant mixture into an arbitrary shape and drying it without burning it. As the lightweight aggregate, e.g. diatomaceous earth, pearlite, expanded vermiculite and porous granular chamotte are exemplified. As the refractory plastic clay, e.g. kibushi clay, kaolin clay and bentonite are exemplified. As the inorganic binder, e.g. water glass, portland cement and a phosphoric acid salt are exemplified. As the organic binder, e.g. methyl cellulose, lignin sulfonate, a phenol resin and an epoxy resin are exemplified.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a self-contained food, such as grains, noodles or liquid beverages, which are the contents of a can, cooked or heated by a high-temperature solid heating element contained in the can. In combustion-type can containers or various furnace materials that require fireproof heat insulation, parts for supporting the heating element and the like in a limited volume to improve fire resistance and heat insulation efficiency and sufficiently secure safety or It relates to fireproof and heat insulating materials.

[0002]

2. Description of the Related Art For example, in order to secure the safety without leaking the heat of a solid heating element housed in a can container, many kinds of combinations such as conventional refractory materials, pearlite powder, and heat insulation materials are required. Met.

[0003] A generally known method for producing a fire-resistant / heat-insulating composition is a method of cutting out from a natural rough stone into a brick shape. A method of binding a natural light raw material. A method of adding a plastic or sublimable substance to a raw material in advance. The method of producing and using light weight particles chemically, the method of chemically foaming mud, and the method of generating foam and adding it to mud. By the way, there are many commercially available methods, and most of them are processed (cut) by firing during production.

[0004]

The ignition and burning temperature of the above-mentioned high temperature solid heating element is as high as 1000 ° C. or more, and the can structure is complicated in order to ensure the safety in use of the can container. In addition to the problem of being forced to be large in size, there was a problem that the manufacturing process, the number of materials and the number of parts increased, and the cost increased.

Further, in most cases, the production of fire-resistant / heat-insulating compositions also requires firing and processing (cutting) steps, making it difficult to obtain products of small size and complicated shape, especially when used for disposable devices. However, there was a drawback that it was high and not practical.

[0006]

The present inventors have arrived at the present invention as a result of various experiments and improvements for the purpose of eliminating the above-mentioned drawbacks of the prior art.

That is, the present invention uses a means of obtaining a desired product without firing by simply mixing a lightweight aggregate, a plastic refractory clay, an inorganic or organic binder, compression-molding in a mold and then drying. .

More specifically, the lightweight aggregate 10 to
50% by weight, 50 to 90% by weight of plastic refractory clay, and 0.1 to 10% by weight of an inorganic or organic binder are mixed and press-molded into an arbitrary shape, followed by drying to obtain a desired product. It is a thing.

As described above, the present invention provides a desired product which is light in weight, excellent in fire resistance, and excellent in heat insulating property without the need of firing and processing (cutting) only by putting the raw material in a mold, compression molding and drying. It has a special effect of being obtained.

[0010]

EXAMPLES The composition of the fire-resistant and heat-insulating composition of the present invention will be described in more detail below with reference to Examples. First, as the lightweight aggregate, diatomaceous earth, perlite, expanded chive stone, porous chamotte particles, hollow It is selected from alumina, and the plastic refractory clay is appropriately selected from those belonging to the systems of kibushi clay, carion clay, elutriated clay and bentonite.
Further, as the inorganic binder, there are water glass, Portland cement, alumina cement, phosphate, etc., and as the organic binder, methyl cellulose, carboxymethyl cellulose, lignin sulfonate, colloidal silica, phenol resin, epoxy resin, polyester resin, melamine resin. , Furan resin, acrylic resin, urea resin, etc.

The weight of the lightweight aggregate used is 10-5.
0 parts by weight is suitable, and if it is 10 parts by weight or less, the heat insulating property is deteriorated, and if it is 50 parts by weight or more, the molding strength is lowered.

On the other hand, 50 to 90 parts by weight of the plastic refractory clay is suitable, and if it is 50% by weight or less, the moldability and fire resistance are deteriorated, and if it is 90% by weight or more, the heat insulating property tends to be deteriorated. .

Therefore, as a concrete example of the present invention,
35% by weight of perlite as a lightweight aggregate, 60% by weight of kibushi clay as a plastic clay, and 5% by weight of phosphate as a binder were thoroughly mixed in a mixer, and 25 g of the composition was placed in a mold and pressed. It was molded and dried in a dryer to a water content of 1% or less to obtain the desired product.

Next, the fire-resistant and heat-resistant composition thus obtained was mounted as a heat insulating material 2 of the self-combustion type heating can container 1 shown in FIG. The high temperature solid heating element 4 having a combustion temperature of 1300 to 1500 ° C. was supported, and the solid heating element 4 was ignited and burned through the igniter 5, and 200 ml of the coffee liquid 6 in the can was about 1 minute later. The temperature was raised to 100 ° C., and then the boiling state continued for about 3 minutes. The temperature of the upper surface (A) and the lower surface (B) of the heat insulating material 2 at this time was measured for 10 samples, and the results are shown in Table 1. The fire resistance and heat insulating property are sufficiently satisfactory. It was

[0015]

As described above, the fire-resistant and heat-resistant composition of the present invention is safe because it supports a high-temperature solid heating element and has fire resistance and heat insulation at the same time. Since there is no need for firing and processing, and a product with a complicated shape can be easily produced only by molding and drying, the manufacturing cost is low, and a lightweight fireproof insulation composition especially suitable for disposable applications. It is now possible to provide.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a central portion of a can container in an example in which the fire resistant / heat insulating composition of the present invention is used in a self-burning can container.

[Explanation of symbols]

 1 can container 2 heat insulating material 3 heat insulating chamber 4 high temperature solid heating element 5 ignition tool 6 coffee liquid

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Claims (1)

[Claims] 1. A lightweight aggregate 10 to 50% by weight is mixed with 50 to 90% by weight of plastic refractory clay and 0.1 to 10% by weight of a binder, and the mixture is pressure-molded into an arbitrary shape and dried without firing. A fire-resistant and heat-insulating composition characterized in that