JPS615997A - Method of housing document and vessel thereof - 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 The present invention relates to a fire-resistant document storage method and its container.

In the event of a fire, even if important documents are kept in a safe, they are often destroyed by fire, leaving people with regrets.

This invention provides a method and a container for storing important documents, mainly made of paper, and protecting them from being burnt out in the event of a fire. A nonflammable and airtight package is installed through the package, and inside the package is a substance that remains solid at room temperature but melts and liquefies when the temperature rises, and is preferably itself flame retardant or self-extinguishing. This substance is molded into an appropriate shape and enclosed with the document.In the event of a fire, this substance melts and penetrates the paper quality of the document, significantly raising its ignition temperature and causing it to decompose. It also exhibits the effect of suppressing carbonization, and therefore sufficiently prevents documents from being burnt out.

Note that when the container of the present invention is placed in a general-purpose safe, the above-mentioned exterior material and heat insulating material can be omitted. In other words, in that case, ``a substance that remains solid at room temperature but melts and liquefies when heated, and is preferably flame-retardant or self-extinguishing in itself, is placed in a nonflammable and airtight packaging bag. A component of the present invention is one in which a document having the following information is molded into an appropriate shape and enclosed together with a document.

Furthermore, the degree to which the packaging is "maintained airtight" is sufficient to suppress natural ventilation under normal pressure, and there is no need to apply a pressure-resistant seal.

As is clear from the above description, the basic technical idea of this invention is that "a substance that remains solid at room temperature and melts and liquefies as the temperature rises" automatically "penetrates into the paper quality of documents" in the event of a fire. It's about letting people know.

Normally, paper whose main material is wood pulp has a temperature exceeding 100°C and 12°C.
From around 0 to 130℃, not only dehydration and drying of the contained moisture, but also a small amount of thermal decomposition begins, and when the temperature exceeds 200℃, it rapidly progresses and generates flammable gas, and the air (oxygen) In the presence of , ignition combustion begins at around 260°C. Furthermore, even if the air is shut off, if heating continues, decomposition will not stop, resulting in a so-called dry distillation state and carbonization will proceed.

The above-mentioned technical idea is that when this paper is impregnated with heavy oil having a high boiling point, the above-mentioned decomposition start temperature is significantly raised.
This is based on the finding that the progress of carbonization is also significantly suppressed. In the present invention,
Based on this knowledge, and in order to achieve this goal, we decided to find and apply a substance that melts only in the event of a fire, penetrates into paper, and produces a similar effect.Of course, the selection of that substance is important. This is the key.

Experimental results showed that solid paraffins were well suited for this purpose and their effectiveness was confirmed. Among them, ``chlorine'', which is made flame retardant by chlorinating it and has self-extinguishing properties, has been confirmed. We have come to know that the most favorable results are obtained when using ``chloroparaffin''.

Furthermore, although a sufficient effect can normally be expected by using only this chlorinated paraffin, if an appropriate amount of antimony oxide powder is also used in combination, the well-known synergistic effect of the two will produce the desired combustion effect. I learned that the deterrence function can be further enhanced.

Examples of embodiments of the present invention are as follows: (1) A 2 to 3 cm thick heat insulating material made by compression molding glass fiber inside a two-part iron plate case with a book-shaped exterior. are attached to each, and between them, a plate-shaped molded product of chlorinated paraffin equivalent to 1.5 to 2 times the weight of the document is layered together with the document, and then a plate-shaped molded product made of aluminum foil with a thickness of about 0.1 mm is placed on top of the document. The device is sealed in a packaging bag.

(2) Place chlorinated paraffin molded into rods with approximately the same weight as the documents around the four sides of the bundled documents, seal them in a metal box, and store them in a regular safe.

(3) On both sides of the stack of documents, overlap thin paper bags filled with a mixture of chlorinated paraffin flakes in an amount equal to the weight of the documents and antimony oxide powder in an amount approximately one-fifth of the weight of the documents. was inserted into a metal foil wrapping bag, the opening of which was sealed by folding it, etc., which was then sandwiched between rock wool pads approximately 1 cm thick, and a piece of metal foil was then tightly laminated on the surface. Enclose in a bag made of asbestos fabric.

In all of the above three cases, in tests that reproduced the flashover conditions at the time of fire (simulated fire), although some differences were seen in the degree of damage, the evidentiary value of documents was maintained (for banknotes, The results showed that the results (determination of the exchangeable range) were sufficiently confirmed.

As described above, the present invention provides an effective method and method for protecting important documents from burnout without requiring large-scale fireproof equipment or measures by utilizing substances that liquefy and penetrate the paper quality of documents in the event of a fire. It provides the container,
It is useful in terms of its economy and simplicity■

Claims (2)

[Claims] (1) A substance that remains solid at room temperature but melts and liquefies when heated, preferably having flame retardant or self-extinguishing properties in a nonflammable and airtight packaging bag. A method for storing documents that can withstand fire, by molding them into an appropriate shape and enclosing them together with documents. (2) A document storage container designed to achieve the purpose set forth in the preceding paragraph.