KR20190090284A - Nonflammable flexible material composition for forming double structure surface with fire resistance and flexibility and nonflammable surface construction method using the same - Google Patents

Abstract

The present invention relates to a double structure non-combustible flexible material composition to improve flexibility and fire resistance inside an LPG tank at the same time. The double structure non-combustible flexible material composition comprises: a first layer; and a second layer laminated on a surface of the first layer, wherein the first layer includes mineral wool, pine needle powder, and a flexible binder and the second layer includes vermiculite, the mineral wool, and a non-combustible binder.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a nonflammable flexible material composition for forming a dual structure surface having fire resistance and flexibility, and a nonflammable flexible surface construction method using the same. BACKGROUND ART < RTI ID = 0.0 >

The present invention relates to a dual structure nonflammable flexible material composition and a nonflammable flexible surface composition method using the same, and more particularly, to a dual structure nonflammable flexible material composition comprising a first layer having flexibility and a second layer having a non- To a non-flammable flexible surface construction method.

BACKGROUND ART Generally, a cargo tank of a carrier for storing or transporting a fluid such as LPG (Liquefied Petroleum Gas) or the like is provided on an outer wall thereof to block entry of heat into a cargo carried by the cargo tank, In order to prevent the lower structure of the ship from being cooled by cold air coming out of the tank, a heat insulating material made of polyurethane foam is installed.

However, the insulating material formed as described above is vulnerable to various kinds of fire. Therefore, when the slag (or fallen material-related falling objects) is dropped by the insulating material during the welding or cutting work related to the LPG CARGO TANK installation work, There was a problem.

Therefore, conventionally, a method of applying a board-shaped non-burnable material to the surface of a heat insulating material has been used, but there has been a problem that a material susceptible to fire is added at the time of making into a board form.

In addition, the board-type non-combustible material has a problem in that it is not flexible enough to cope with shrinkage and expansion when the surface of the tank or the like is closed due to LPG in the tank.

Patent Publication No. 2017-0050861

SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems described above, and it is an object of the present invention to provide a dual structure nonflammable flexible material composition comprising a first layer having flexibility and a second layer having nonflammability and a method of constructing a nonflammable flexible surface using the same .

The double structure nonflammable flexible material composition according to the present invention comprises a first layer and a second layer laminated on the surface of the first layer, wherein the first layer comprises mineral wool, a breeze and a flexible binder, 2 Rainer may include vermiculite, mineral wool, fireproof binder.

The first layer includes 30 to 40 wt% of mineral wool, 10 to 20 wt% of breeze and 40 to 50 wt% of a flexible binder. The second layer includes 25 to 35 wt% of vermiculite, 20 to 35 wt% of mineral wool, And 40 to 50 wt% of the binder.

The flame-retardant binder may further contain at least one inorganic flame retardant compound selected from the group consisting of aluminum hydroxide, magnesium hydroxide, magnesium oxide, zinc phosphate, zinc oxide and antimony oxide in an amount of 15 to 25 parts by weight and at least one compound selected from sodium silicate, calcium silicate, 50 to 60 parts by weight, and 1 to 5 parts by weight of at least one compound selected from calcium carbonate, sepiolite and zeolite.

In addition, the first layer and the second layer may be formed by spraying.

A method for constructing a nonflammable flexible surface according to the present invention comprises the steps of: applying a first layer having flexibility to an inner surface of a marine tank; And a second layer having a nonflammable property on a surface of the first layer, wherein the first layer includes mineral wool, a benthic lentil, and a flexible binder, and the second layer includes vermiculite, mineral wool, Non-combustible binders.

The first layer includes 30 to 40 wt% of mineral wool, 10 to 20 wt% of breeze and 40 to 50 wt% of a flexible binder. The second layer includes 25 to 35 wt% of vermiculite, 20 to 35 wt% of mineral wool, And 40 to 50 wt% of the binder.

The flame-retardant binder may further contain at least one inorganic flame retardant compound selected from the group consisting of aluminum hydroxide, magnesium hydroxide, magnesium oxide, zinc phosphate, zinc oxide and antimony oxide in an amount of 15 to 25 parts by weight and at least one compound selected from sodium silicate, calcium silicate, 50 to 60 parts by weight, and 1 to 5 parts by weight of at least one compound selected from calcium carbonate, sepiolite and zeolite.

Further, the method may further include forming a heat insulating layer containing polyurethane on the inner surface of the marine tank, and the first layer may be applied to the surface of the heat insulating layer.

The first layer and the second layer may be sprayed on the inner surface of the marine tank.

The first layer having flexibility and the second layer having a nonflammable property can be simultaneously provided to improve flexibility and fire resistance inside the LPG tank.

The first layer and the second layer can be applied through spraying and the integrated construction can be performed in the field so that the workability can be improved.

And the first layer and the second layer are applied through the spraying, so that the large area can be efficiently installed.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 schematically illustrates a nonflammable flexible surface according to the present invention.
2 conceptually illustrates a method of applying a nonflammable flexible surface according to the present invention;
FIG. 3 is a photograph showing a cross-section of a specimen having a double structure in which a first layer and a second layer according to the present invention are bonded. FIG.

It is to be understood that the words or words used in the present specification and claims are not to be construed in a conventional or dictionary sense and that the inventor can properly define the concept of a term to describe its invention in the best way And should be construed in accordance with the meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The double structure nonflammable flexible material composition according to the present invention can be applied to the inner surface of a marine LPG tank. However, the present invention is not limited to this, and it is obvious that it can be used as a building material requiring flexibility and incombustibility at the same time. These double structure nonflammable flexible materials can be manufactured in board form or sprayed on the surface of the tank in the field. That is, the nonflammable flexible surface of a prefabricated tank constructed using a dual structure nonflammable flexible material composition can be formed by laminating a first layer providing flexibility and a second layer providing nonflammability.

The dual structure nonflammable flexible material composition according to the present invention comprises a first layer and a second layer laminated to the surface of the first layer, wherein the first layer comprises mineral wool, And the second laser may comprise vermiculite, mineral wool, and a fireproof binder.

In this case, the first layer includes 30 to 40 wt% of mineral wool, 10 to 20 wt% of breeze and 40 to 50 wt% of flexible binder, the second layer includes 25 to 35 wt% of vermicite, 20 to 35 wt% of mineral wool, 40 to 50 wt%.

The first layer can play a role in imparting flexibility in a dual structure. The first layer may be formed on the inner surface of a tank (hereinafter referred to as a tank) for storing the LPG of the ship. The first layer may be formed on the surface of the heat insulating layer comprising polyurethane formed on the inner surface of the tank. The first layer may be formed by spraying on the inner surface of the tank.

The mineral wool of the first layer is an insulator made of calcium silicate type ore melted at a high temperature and made into a fiber shape. It is added to ensure the nonflammability, and also has the effect of securing flexibility at the same time by adding fiber. The mineral wool may be a loose wool.

When the content of mineral wool is less than 30 wt%, the effect of addition of mineral wool is insufficient. When the content of mineral wool is more than 40 wt%, the amount of mineral wool in the first layer is preferably in the range of 30 to 40 wt% There is a disadvantage that individual materials are broken at the time of manufacturing.

The first layer may contain 10-20 wt% of bovine leaf. Seedlings are obtained by pulverizing leaves of common pine in powder form, and can be added in order to impart flexibility and flexibility due to phytoncite components. If it is added in an amount of less than 10 wt%, the effect of addition of the breeze is insufficient, and if it is added in an amount exceeding 20 wt%, the flame retardant performance of the double structure nonflammable flexible material is deteriorated.

The first layer may comprise from 40 to 50 wt% of a flexible binder. The flexible binder may be added to impart flexibility to the first layer. Flexible binders combine the materials that make up the first layer and can be molded into boards or sprayed on site. However, when the amount of the flexible binder is less than 40 wt%, the bonding strength is weakened. When the amount is more than 50 wt%, the flame retardant performance is deteriorated and it is vulnerable to fire.

Specifically, the flexible binder includes 10 to 15 wt% of lithium silicate, 40 to 55 wt% of acrylic emulsion, 1 to 3 wt% of AE water reducing agent, 1 to 2 wt% of aerosil 200, 5 to 10 wt% of fumed silica, 10 to 20 wt% 10 wt%. It is preferable that the flexible binder is added within the above-mentioned range in order to secure the bonding of the first layer with the above-mentioned other flexible material and thus the flexibility of the first layer. In this case, since the flexible binder has a semi-fire-proof characteristic, it is preferable to use an appropriate amount, but it is preferably used as low as possible. In the present invention, it is preferable that the flexible layer is used only for the first layer,

The second layer plays a role of imparting incombustibility or semi-incombustibility in a dual structure and can improve the fire resistance performance of the dual structure. The second layer may be formed on the inner surface of the tank. The second layer may be formed on the inner surface of the first layer described above. Therefore, the insulating layer, the first layer, and the second layer may be laminated in this order from the inner surface of the tank. The second layer may be formed in a board form together with the first layer described above, and may be formed by applying or spraying on the surface of the first layer.

The second layer may comprise 25 to 35 wt% vermiculite. The vermiculite forms a board shape and can play a role of imparting nonflammability to the second layer. The vermiculite is preferably used in the form of powder, and the porosity is nonflammable and lightweight can be ensured. However, when the content of vermiculite is less than 25 wt%, the effect of improving the fire resistance due to the addition of vermiculite is insufficient. On the contrary, when the content of vermiculite is more than 35 wt%, the disadvantage .

The second layer may comprise 20 to 35 wt% of mineral wool. As described above, mineral wool is a heat insulation material made by melting calcium silicate ore at high temperature and made into a fiber shape. It secures fire resistance of the second layer which can be directly exposed to the fire, There is an effect that can be ensured at the same time.

However, when the content of mineral wool is less than 20 wt%, the effect of addition of mineral wool is insufficient. When the mineral wool is added in an amount exceeding 35 wt%, the disadvantage , It is preferable that the content is 20 to 35 wt%.

The second layer may comprise 40 to 50 wt% non-combustible binder. The non-combustible binder may be added to impart non-flammability to the second layer. The incombustible binder combines the materials constituting the second layer, and can be formed into a board form or sprayed in the field. However, when the incombustible binder is added in an amount of less than 40 wt%, the bonding force is weakened. When the incombustible binder is added in an amount exceeding 50 wt%, the flexibility is deteriorated.

Specifically, the fire-retardant binder comprises 15 to 25 parts by weight of at least one inorganic flame retardant selected from the group consisting of aluminum hydroxide, magnesium hydroxide, magnesium oxide, zinc phosphate, zinc oxide and antimony oxide, sodium silicate, calcium silicate, From 50 to 60 parts by weight of at least one compound selected from group 2, and from 1 to 5 parts by weight of at least one compound selected from group 3 comprising calcium carbonate, sepiolite and zeolite. Can be prepared by stirring with water in a stirrer, followed by a stabilization step. Further, by following the above-mentioned content, it is possible to reduce the gas generation amount, reduce the mass reduction upon heating, and improve the adhesion. In addition, the water resistance can be enhanced and the whitening phenomenon (discoloration) can be minimized.

Hereinafter, a method of constructing a nonflammable flexible surface using the double structure nonflammable flexible material will be described. This nonflammable flexible surface can be applied to the inner surface of the marine LPG tank. However, the present invention is not limited to this, and it is obvious that the present invention can be applied to a building requiring both flexibility and nonflammability.

A method for constructing a nonflammable flexible surface according to the present invention comprises the steps of: applying a first layer having flexibility to an inner surface of a ship tank; And a second layer having a nonflammable property on a surface of the first layer, wherein the first layer includes mineral wool, a benthic lentil, and a flexible binder, and the second layer includes vermiculite, mineral wool, Non-combustible binders.

The second layer may include 25 to 35 wt% of vermiculite, 20 to 35 wt% of mineral wool, 30 to 40 wt% of mineral wool, 10 to 20 wt% of breeze and 40 to 50 wt% of a flexible binder. , And 40 to 50 wt% of a fire-retardant binder.

The flame-retardant binder may further contain at least one inorganic flame retardant compound selected from the group consisting of aluminum hydroxide, magnesium hydroxide, magnesium oxide, zinc phosphate, zinc oxide and antimony oxide in an amount of 15 to 25 parts by weight and at least one compound selected from sodium silicate, calcium silicate, 50 to 60 parts by weight, and 1 to 5 parts by weight of at least one compound selected from calcium carbonate, sepiolite and zeolite.

The composition may be formed into a fluid gel state by mixing the above-mentioned compositions constituting the first layer and the second layer with the rest of the water.

The first layer and the second layer may be applied by spraying or spraying the first layer and the second layer on the inner surface of the marine tank, respectively. However, it may be formed into a board form using the double structure nonflammable flexible material composition, and may be applied and attached.

The method may further include the step of forming a heat insulating layer containing polyurethane on the inner surface of the marine tank before the first layer is applied, and the first layer may be applied to the inner surface of the heat insulating layer.

As described above, according to the present invention, it is possible to improve the fire resistance and the flexibility (including the second layer (nonflammable surface) including vermiculite, mineral wool and fireproof binder and the first layer The present invention provides a nonflammable flexible material composition for surface formation of a double structure, and provides a double structure nonflammable flexible surface construction method using the same.

As described above, according to the present invention, a mixture containing a flexible mineral wool, a bamboo leaf, and a flexible binder is sprayed on an inner surface of a tank to form a first layer, and a non-combustible vermiculite, a mineral wool, The second layer is applied to the inner surface of the tank to ensure the shrinking expansion and flexibility of the inner surface of the tank, and at the same time, the surface finish with excellent fire resistance performance can be realized.

In addition, efficiency of construction and excellent quality can be ensured through layer construction that can be sprayed.

[Example 1]

A first layer was formed including 23 wt% of mineral wool loose wool, 11 wt% of breeze and 66 wt% of flexible binder, and a second layer including 24 wt% of vermiculite, 16 wt% of mineral wool loose wool and 60 wt% of non- A specimen 1 having a double structure was prepared.

Table 1 below shows the test results of the flammability test for the second layer constituting the incombustible layer. The test methods of the incombustibility test and the gas harmfulness test are applied to KS F ISO 1182: 2014 and KS F 2271: 2006, respectively .

[Example 2]

Table 2 below shows the results of testing the fire retardant performance of the first layer constituting the flexible layer. Specimen 2 was prepared using mineral wool in the form of powder in the composition of Example 1. The test methods of the incombustibility test and the gas harmfulness test were applied in accordance with KS F ISO 1182: 2014 and KS F 2271: 2006, respectively, as in Example 1.

[Example 3]

A first layer was formed including 23 wt% of mineral wool loose wool, 11 wt% of breeze and 66 wt% of flexible binder, and a second layer including 24 wt% of vermiculite, 16 wt% of mineral wool loose wool and 60 wt% of non- A specimen 3 having a double structure was prepared.

Table 3 below shows the results of testing the flexural performance of the first layer constituting the flexible layer. The tear strength is measured at a test speed of 500 mm / min according to KS M ISO 34-1: 2014 and KS F 4922: 2007 And the stretchability of the heat-stretchable sheet was measured at 140 ° C ± 2 ° C for 168 hours in accordance with KS F 4922: 2007.

#One #2 Strength (kN / m) 43.3 31.1 Elasticity (%) -1.4 -0.2

Although the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, The present invention is not limited thereto. It will be apparent to those skilled in the art that various substitutions, modifications and variations are possible within the scope of the present invention, and it is obvious that those parts easily changeable by those skilled in the art are included in the scope of the present invention .

Claims (9)

A first layer and a second layer stacked on a surface of the first layer,
Wherein the first layer comprises a mineral wool, a breeze and a flexible binder, and the second rainner comprises vermiculite, a mineral wool, and a fireproof binder.
The method according to claim 1,
Wherein the first layer comprises 30 to 40 wt% of mineral wool, 10 to 20 wt% of breeze and 40 to 50 wt% of a flexible binder and the second layer comprises 25 to 35 wt% of vermiculite, 20 to 35 wt% of mineral wool, ≪ / RTI > to about 50 wt.% Of the composition.
The method according to claim 1,
Wherein the fire-retardant binder comprises 15 to 25 parts by weight of at least one inorganic flame retardant selected from aluminum hydroxide, magnesium hydroxide, magnesium oxide, zinc phosphate, zinc oxide and antimony oxide, at least one compound selected from the group consisting of sodium silicate, calcium silicate, And 1 to 5 parts by weight of at least one compound selected from calcium carbonate, sepiolite and zeolite.
The method according to claim 1,
Wherein the first layer and the second layer are applied through spraying.
A method of constructing a nonflammable flexible surface on a surface of a ship tank,
Constructing a first layer having flexibility on an inner surface of a ship tank; And
And a second layer having a nonflammable property on the surface of the first layer,
Wherein the first layer comprises a mineral wool, the benthic lentil, and the flexible binder, and the second layer comprises vermiculite, mineral wool, and a fireproof binder.
6. The method of claim 5,
Wherein the first layer comprises 30 to 40 wt% of mineral wool, 10 to 20 wt% of breeze and 40 to 50 wt% of a flexible binder and the second layer comprises 25 to 35 wt% of vermiculite, 20 to 35 wt% of mineral wool, ≪ / RTI > to 50 wt.
6. The method of claim 5,
Wherein the fire-retardant binder comprises 15 to 25 parts by weight of at least one inorganic flame retardant selected from aluminum hydroxide, magnesium hydroxide, magnesium oxide, zinc phosphate, zinc oxide and antimony oxide, at least one compound selected from the group consisting of sodium silicate, calcium silicate, And 1 to 5 parts by weight of at least one compound selected from calcium carbonate, sepiolite and zeolite.
6. The method of claim 5,
Further comprising the step of forming a heat insulating layer containing polyurethane on the inner surface of the marine tank,
Wherein the first layer is applied to the surface of the insulating layer.
6. The method of claim 5,
Wherein the first layer and the second layer are sprayed on the inner surface of the marine tank.

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