JP2003073973A - Waterproof nonflammable sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof nonflammable sheet having high nonflammability and waterproof. SOLUTION: This waterproof nonflammable sheet has a base cloth comprising a nonflammable woven fabric of an inorganic fiber, and a waterproof resin covering layer formed on one or both surfaces thereof and consisting essentially of a vinyl chloride resin. The characteristic value (a) represented by the equality (I): (a)=K/N<-0.7> of the warp and weft yarns of the base fabric [wherein, K is a cover factor represented by the equality of K=n/√N ((n) is the count of the warp or weft yarns per 25.4 mm; and N is a size of the warp yarn and the weft yarn expressed in terms of tex)] is regulated within the range of 60-150, and the waterproof resin covering layer contains 40-150 pts.wt. plasticizer and 3-150 pts.wt. inorganic flame retardant based on 100 pts.wt. vinyl chloride resin. The total dried weight of the vinyl chloride resin and the plasticizer is regulated so as to be 60-400 g/m<2> .

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof / noncombustible film material having high noncombustibility and waterproofness required as a building material in buildings in urban areas.
To be more specific, the present invention can form a flameproof hanging wall that delays diffusion of harmful smoke and flames that hinder evacuation in an emergency such as fire, and has excellent waterproofness, The present invention relates to a waterproof / noncombustible film material useful for constructing a tent type structure that is stretched for the purpose of forming a waterproof space.

[0002]

2. Description of the Related Art In membrane materials used for building materials,
On the other hand, when a high degree of flame retardancy or nonflammability is required, the membrane material type A and the membrane material type B according to the regulations of the Japan Membrane Structure Association are used. As the film material type A, a glass fiber base cloth coated with a nonflammable resin having a combustible oxygen concentration limit index of 95 or more such as PTFE (polytetrafluoroethylene) is used in a large sports facility or the like. . However, since this non-combustible film material is expensive,
The appearance of a cheaper and more versatile film material is desired. As the membrane material type B, there is provided a membrane material in which a glass fiber base cloth is coated with a silicone resin which is cheaper than PTFE, but this has drawbacks such as lack of heat-sealing property and easy stain. Therefore, it is rarely used for applications such as tents. Further, as the film material type B, a film material in which a glass fiber base cloth is coated with a vinyl chloride resin containing a flame retardant is known, and it is widely used because it is inexpensive and versatile.

In recent years, from the viewpoint of disaster prevention, it is important to secure the possibility of evacuation and prevent the spread of fire in the event of a fire. For this reason, when the film material burns, pinholes do not occur in the film material, and high shielding is achieved. There is a demand for a non-combustible film material that meets the requirements of maintaining smoke and flameproof properties, a low calorific value of combustion, and a high fire spread prevention property. However, the existing membrane material type A and membrane material type B using a silicone resin have a drawback in that the generation of pinholes after combustion cannot be prevented, although the calorific value during combustion is small. Further, even the film material type B using a general-purpose vinyl chloride resin cannot sufficiently meet the requirements such as a small calorific value at the time of combustion and no occurrence of pinholes after combustion, Therefore, the level of the non-combustible film material is insufficient.

[0004]

DISCLOSURE OF THE INVENTION The present invention uses a woven fabric made of non-combustible inorganic fiber as a base fabric, which is coated with a waterproof resin containing a vinyl chloride resin as a main component. In addition to heat fusion, bending resistance, and other properties required for tent membrane materials, pinholes do not occur after combustion, and high smoke and flame resistance are maintained. It is an object of the present invention to provide a waterproof / non-combustible film material that has a possibility of evacuation, has a low calorific value upon combustion, and therefore has excellent fire spread prevention properties.

[0005]

The waterproof / noncombustible membrane material of the present invention comprises a base cloth containing a woven fabric made of noncombustible inorganic fibers, and a vinyl chloride resin formed on at least one surface of the base cloth. And a waterproof resin coating layer containing as a main component, the characteristic value a of the warp and weft of the base fabric represented by the following formula (I): a = K / N ^-0.7 (I) [however, K represents the cover factor of the warp or weft expressed by the following formula (II), and K = n / √N (II) n represents the density of the warp or weft per 25.4 mm (1 inch) of the woven fabric. Where N represents the tex fineness of the warp or weft] is in the range of 60 to 150, the waterproof resin coating layer, together with the vinyl chloride resin,
With respect to 100 parts by weight thereof, the vinyl chloride resin and the plasticizer, which are included in the waterproof resin coating layer, include 40 to 150 parts by weight of a plasticizer and 3 to 150 parts by weight of an inorganic flame retardant. The total dry mass of is in the range of 60 to 400 g / m ² . In the waterproof / noncombustible film material of the present invention, the noncombustible inorganic fiber for the base cloth,
It is preferably made of at least one selected from glass fiber and silica fiber. In the waterproof / non-combustible film material of the present invention, it is preferable that the inorganic flame retardant comprises at least one selected from antimony compounds and molybdenum compounds.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The base fabric of the waterproof / noncombustible membrane material of the present invention is composed of a woven fabric made of noncombustible inorganic fibers. As the non-combustible inorganic fiber, asbestos fiber, alumina fiber, boron fiber, boron nitride fiber, silicone carbide fiber, titania fiber, silica fiber, glass fiber, metal fiber and the like are used. Among these, it is preferable to use a woven fabric made of a glass fiber yarn and / or a silica fiber yarn, which has excellent strength and heat resistance and is not affected by low temperature and ultraviolet rays. As the glass fiber yarn, for example, fiberglass β yarn, D yarn, DE yarn or the like is preferably used. As the silica fiber yarn, a twisted yarn made of silica fiber obtained by extracting E glass (boron silicate glass having an alkali content of 1% or less) fiber with sulfuric acid and containing 95% or more of SiO ₂ is used. In addition, other non-combustible metal fibers, inorganic fibers such as alumina fibers, alumina silica fibers, asbestos, slag wool, and stainless steel fibers may be mixed in the glass fiber woven fabric and the silica fiber woven fabric. Further, for the glass fiber woven fabric and the silica fiber woven fabric, twisted yarns containing stainless steel fibers, carbon fibers, alumina fibers or the like as reinforcing core yarns may be used as reinforcing yarns. Further, a woven fabric made of a mixed fiber yarn of glass fiber and silica fiber or a woven fabric made of a mixed yarn of glass fiber and silica fiber may be used.

There is no limitation on the weave structure of the non-combustible woven fabric for the base fabric used in the present invention, but in general, plain weave, twill weave, satin weave, ridge weave, fish weave, double weave, other multiple weave, etc. Is preferably used. The thickness of the non-combustible woven fabric is not limited, but generally it is preferably 0.05 to 3 mm, more preferably 0.1 to 2.0 mm.

The base fabric of the waterproof / noncombustible film material of the present invention is required to satisfy the following conditions. Characteristic value a represented by the following formula (I) of the warp and weft of the woven fabric for base fabric: a = K / N- ^0.7 (I) [wherein K is represented by the following formula (II) of the warp or weft Represents a cover factor, K = n / √N (II) n represents the density of warp or weft per 25.4 mm (1 inch) of the woven fabric, and N represents the tex fineness of the warp or weft]] All are in the range of 60 to 150, preferably in the range of 65 to 145.

When the characteristic value of the formula (I) of any of the warp and weft yarns of the non-combustible inorganic fiber woven fabric is less than 60, when the film material is subjected to the heat release test of the cone calorimeter test according to ISO 5660 Part 1, Pinholes are easily generated in the film material, and the smoke-proof property and flame-proof property are deteriorated. Further, one of the characteristic values a of the warp and weft yarns is 150
If it exceeds, the weavability of this woven fabric becomes poor, the flexibility of the woven fabric itself becomes poor, and the texture as a film material becomes hard,
Practicality is also poor due to poor handling.

When a glass fiber woven fabric is used as the woven fabric for the base fabric, it is preferable that the glass fiber yarns constituting the glass fiber woven fabric are previously sized for the purpose of maintaining strength. When the waterproof / noncombustible film material is used outdoors such as in tents, a so-called plastic sizing agent is used without the use of hydrophilic sizing agents such as starch and cornstarch for the purpose of imparting water absorption prevention to the base fabric. It is preferable to use. For the water absorption prevention treatment of the base cloth, it is preferable to use a fluorine-based water and oil repellent agent. Further, it is preferable to add a silane coupling agent to the sizing agent and / or the water absorption preventing treatment agent to improve the adhesiveness with the waterproof resin coating layer laminated on the base fabric later. An adhesive agent or the like may be applied to the base cloth in advance to perform a treatment for enhancing the adhesiveness with the waterproof resin coating layer. As this adhesive, an adhesive of vinyl chloride type, urethane type, polyester type, epoxy type, acrylic type or the like can be used. The coating amount of this adhesive is preferably 80 g / m ² or less.

The waterproof resin coating layer used in the present invention contains a vinyl chloride resin as a main component, and further contains a plasticizer and an inorganic flame retardant. That is, the waterproof resin coating layer contains a polymer having a plasticizer or a plasticizing action on a vinyl chloride resin, and an inorganic flame retardant, and further, if necessary, an inorganic filler, a stabilizer, an ultraviolet absorber, a light absorber. It is preferable to use a soft vinyl chloride resin containing a stabilizer, a colorant, an antifungal agent, and / or an adhesive. Vinyl chloride resin is waterproof, flexible, weather resistant, cold resistant,
Also, it is excellent in coloring property, and a desired design can be easily applied to the film material, and stable heat fusion property can be applied.

Vinyl chloride resins include vinyl chloride polymers, vinyl chloride / vinyl acetate copolymers, vinyl chloride / acrylic acid ester copolymers, and vinyl chloride / vinyl chloride.
A vinylidene chloride copolymer and the like are included, and these may be used alone or as a mixture of two or more kinds.

The plasticizer which can be used in the present invention is not particularly limited, but as the phthalic acid ester plasticizer, dibutyl phthalate, diethyl phthalate, dihebutyl phthalate, di-2-ethylhexyl phthalate, di-n-octyl phthalate, di-phthalate. Nonyl phthalate, di-n-decyl phthalate, diisodecyl phthalate, ditridecyl phthalate, butylbenzyl phthalate and the like are used, and adipic acid is used as a polyester plasticizer such as 2-methyl-1,8-octanediol, 1,2. -Products obtained by esterification with one or more glycols such as propanediol, 1,3-butanediol, 2-ethylhexanol, and n-octanol can be used. Further, as the trimellitic acid plasticizer, , Tri-2-ethylhexyl trime Rate, and the like can be used triisodecyl trimellitate rate, other plasticizers, pyromellitic acid plasticizers such as 2-ethylhexyl pyromellitate rate can also be used. Further, as the polymer having a plasticizing action, ethylene-vinyl acetate copolymer,
And / or a polymer obtained by introducing carbon monoxide into an ethylene-acrylic acid ester copolymer can be used. Such polymers include Elvalloy 742 manufactured by Mitsui DuPont Chemicals.
(Trademark) is included.

The amount of the plasticizer added to the vinyl chloride resin is 40 to 15 relative to 100 parts by weight of the vinyl chloride resin.
It is preferably 0 parts by weight, more preferably 45 to 120 parts by weight. If it is less than 40 parts by weight, the resulting waterproof resin coating layer becomes excessively hard, cannot follow movements such as bending, and cracks are likely to occur, leading to deterioration in waterproofness. Further, when it exceeds 150 parts by weight, the resin strength of the obtained waterproof resin coating layer decreases, the strength of the heat-sealed portion becomes insufficient, and / or the plasticizer migrates to the surface of the waterproof resin coating layer. As a result, a problem may occur in that dirt easily adheres to the surface of the film material.

The vinyl chloride resin-containing waterproof resin coating layer of the present invention contains an inorganic flame retardant. The amount of the inorganic flame retardant compounded in the waterproof resin coating layer is vinyl chloride resin 10
It is preferably from 3 to 150 parts by weight, and more preferably from 5 to 120 parts by weight, relative to 0 parts by weight. When the content of the inorganic flame retardant is less than 3 parts by weight, the flame retardancy of the vinyl chloride resin layer becomes insufficient, and the ISO 566
When a cone calorimeter test based on 0 and Part 1 is performed, pinholes may easily occur in this film material. If it exceeds 150 parts by weight, the flexibility and resin strength of the vinyl chloride resin layer will decrease, and the flex resistance of the coating and the heat-sealed base cloth and waterproof resin coating layer of the sewn portion will be reduced. The peeling strength between the two may decrease.

The total dry mass of the vinyl chloride resin and the plasticizer in the waterproof resin coating layer of the waterproof / noncombustible film material of the present invention is 6
It is 0 to 400 g / m ² , and preferably 80 to 350 g / m ² . If the total dry mass of the vinyl chloride resin and the plasticizer is less than 60 g / m ² , it is not possible to obtain a coating having sufficient waterproofness. Further, the heat fusion property by the high frequency welder may be insufficient. Further, when the total dry mass of the vinyl chloride resin and the plasticizer exceeds 400 g / m ² , the dry mass of the combustible substance in the waterproof resin coating layer per unit area of the obtained membrane material increases, and the ISO
In the exothermic test of the cone calorimeter test based on 5660 and Part 1, the total calorific value and the exothermic rate exceed the reference values, and the results of the gas poisoning test become poor, which makes it difficult to impart incombustibility.

The inorganic flame retardants used in the vinyl chloride resin-containing waterproof resin coating layer of the present invention include antimony compounds, molybdenum compounds, zinc borate, barium sulfate,
Aluminum hydroxide, magnesium hydroxide, ammonium polyphosphate, red phosphorus and the like can be used alone or as a mixture of two or more kinds. Among these, particularly preferable as the inorganic flame retardant are antimony compounds such as antimony trioxide and antimony pentoxide, and molybdenum compounds. Antimony compounds impart high flame retardancy to vinyl chloride resins and have a strong effect of preventing flammability, while molybdenum compounds suppress combustion heat to a low level, reduce smoke generation, reduce harmful combustion gases, and promote carbonization. It is useful because it has the effect of suppressing the generation of pinholes in the base fabric.
Examples of the molybdic acid compound include calcium zinc molybdate, potassium molybdate, sodium molybdate, calcium molybdate carbonate, ammonium molybdate, and the like. The inorganic flame retardant used in the present invention may be previously subjected to a silane coupling treatment to enhance the adhesion with the resin. Further, in the vinyl chloride resin layer, as a flame retardant, other flame retardants such as bromine flame retardant and phosphoric acid are used as long as the total calorific value and the heat generation rate at the time of burning the film material do not exceed the standard value of ISO 5660 Part1. Ester, halogen-containing phosphate ester, chlorinated paraffin, etc. can be used. As the bromine flame retardant, decabromodiphenyl ether, pentabromomethylbenzene, hexabromobenzene and the like can be used. As the phosphoric acid ester, triphenyl phosphate, tricresyl phosphate, cresyl diphenyl phosphate and the like can be used.

The stabilizer contained in the vinyl chloride resin of the waterproof resin coating layer includes calcium / zinc type, barium / zinc type, cadmium / barium type, lead type, organotin laurate type, and organotin mercaptite type, Further, stabilizers such as epoxy type may be used alone or in combination of two or more kinds. The amount of the stabilizer compounded is preferably 0.5 to 10 parts by weight with respect to 100 parts by weight of the vinyl chloride resin.

The waterproof / noncombustible film material of the present invention is formed with a waterproof resin coating layer containing a vinyl chloride resin as a main component.
It is formed into a film in advance, and a method of thermally laminating it on a base cloth made of inorganic fibers, a method of melt coating a resin on the base cloth, a method of coating a liquid resin on the base cloth, and a base cloth in a liquid resin It is performed using a method such as dipping.

In the waterproof / noncombustible film material of the present invention, a stain prevention layer containing a thermoplastic resin as a main component can be formed as the outermost layer. As the thermoplastic resin used for this purpose, acrylic resin, fluorine resin, polyester resin, urethane resin and the like can be used.
The stain prevention layer is preferably formed to a thickness of 0.5 to 10 μm.

The waterproof / non-combustible film material of the present invention thus obtained has heat fusion property, flexibility, stain resistance and the like.
It has all the performance required for tent membrane materials.

[0022]

The present invention will be described in more detail with reference to the following examples. Description of test method (1) Waterproofing test: The water pressure resistance of the sample was measured by the JIS-L-1092 hydrostatic pressure method. The results are displayed as shown below. ◯: Water pressure resistance = 1500 mm or more, ×: Water pressure resistance = 1500 mm
Less than (2) Bending resistance test: A load of 9.8 N is applied to a test piece according to JISP8115 "Folding strength test method of MIT type tester for paper and paper board", and bending is performed 500 times. However, the radius of curvature of the bent surface was 3.00 ± 0.03 mm. The bent portion was observed and examined for any abnormality in the waterproof resin coating layer, and the result was displayed as follows. ○: No abnormality, ×: Cracks occurred in the waterproof resin coating layer (3) Thermal fusion test: The film material was fused with a high-frequency welder, the peel strength was measured, and the peeling state was observed. It was displayed like. Peel strength ○: 30 N / 3 cm or more, ×: less than 30 N / 3 cm Peel condition ○: Peel between base cloth and resin layer, X: Peel between fused surface layers (4) Flammability test : Cone calorie according to ISO 5660 Part 1 Metering test heating strength 50kW / m
^{2. The} total heat generation amount and heat generation rate were measured under the conditions of a test time of 20 minutes. Total calorific value 8 MJ / m ² or less, heating rate 1
The passing standard as a non-combustible film material was that it did not exceed 200 kW / m ² for more than 0 seconds and that no pinhole was confirmed in the sample after the test. The test results are displayed as follows. Total calorific value ○: 8 MJ / m ² or less, ×: heat generation rate exceeding 8 MJ / m ² ○: 200 kW / m ² not exceeding 10 seconds ×: Pinhole exceeding 200 kW / m ² exceeding 10 seconds ◯: not recognized, x: recognized (5) Flame retardancy test : Flame retardancy was evaluated according to JIS L1091 “Flammability test of textile products”. The test results are displayed as follows. ○: Category 3 pass, ×: Category 3 fail

[Example 1] Preparation of glass fiber base cloth Threads used: 67.5 tex for both warp and weft, density: 44.7 warp /
25.4 mm, weft 33.5 / 25.4 mm, texture: plain weave,
A glass fiber woven fabric having a mass of 215 g / m ² was prepared. The characteristic value a of the formula (1) of this glass fiber woven fabric is as follows:
8, latitude: 77.9. The above glass fiber woven fabric is dipped in a treatment bath containing 3% of a fluorine-based water repellent and 2% of a silane coupling agent, squeezed with a rubber mangle so that a pickup rate is 45%, and this is dried in a dryer at 180 ° C. After being dried for 2 minutes and subjected to water absorption prevention treatment, a base fabric of waterproof noncombustible film material was produced. The following composition was added to this base cloth: Vinyl chloride resin 100.0 parts by weight di-2-ethylhexyl phthalate 85.0 parts by weight antimony trioxide 50.0 parts by weight Ba-Zn-based stabilizer 3.0 parts by weight UV absorber 0. 5 parts by weight isocyanate adhesive 5.0 parts by weight Pigment (titanium oxide) Vinyl chloride resin paste sol having 3.0 parts by weight
Both sides were coated with 0 g / m ^{2 and} heat-treated in a dryer at 185 ° C. for 2 minutes to form a waterproof resin coating layer. Furthermore, this was heat-treated at 190 ° C., and the surface was pressed and smoothed by a cooling mirror surface roll. Next, an acrylic resin solution having the following composition: 12 parts by weight of DIANAR BR-83 45 parts by weight of methyl ethyl ketone and 43 parts by weight of toluene was coated on both sides of the waterproof resin coating layer / base cloth laminate with an 80 mesh gravure coater. And dried at 100 ° C. for 1 minute to form a stain prevention layer having a thickness of 1.2 μm on each side.
This waterproof / noncombustible film material was subjected to the above test. The test results are shown in Table 1.

[Example 2] A woven glass fiber cloth was used.
67.5 tex in both history and density, density: 41.7 lines / 25.4
mm, weft 32.5 pieces / 25.4 mm, texture: plain weave, mass: 2
A waterproof / noncombustible film material was produced in the same manner as in Example 1 except that the amount was 05 g / m ² . The characteristic value a of the formula (1) of the glass fiber woven fabric used for this is as follows: warp: 96.7, weft: 75.5.
Met. This waterproof / noncombustible film material was subjected to the above test.
The results are shown in Table 1.

[Example 3] A woven glass fiber cloth was used.
Both history is 22.5 tex, density: 59.9 pieces / 25.4
mm, weft 57.9 lines / 25.4 mm, structure: 4H satin, mass: 106 g / m ^{2 A} waterproof / noncombustible film material was produced in the same manner as in Example 1. The characteristic value a of the formula (1) of the glass fiber woven fabric used for this is as follows: warp: 111.7, weft:
It was 107.9. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 1.

[Example 4] A woven glass fiber cloth was used with the following yarns:
Both the history and the history are 67.5 tex, and the density is 56.9 pieces / 25.4.
mm, weft 53.8 lines / 25.4 mm, structure: 8H satin, mass: 300 g / m ^{2 A} waterproof / noncombustible film material was produced in the same manner as in Example 1. The characteristic value a of the formula (1) of the glass fiber woven fabric used for this is: 132.10,
Latitude: 125. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 1.

[Example 5] A glass fiber woven fabric was used with the yarn:
Both history is 135.0 tex, density is 31.5 / 25.
4 mm, weft 27.4 pieces / 25.4 mm, texture: plain weave, mass:
And 325 g / m ^2, the following composition of the vinyl chloride resin: vinyl resin 100.0 parts by weight di-2-ethylhexyl phthalate 85.0 parts by weight of antimony trioxide 50.0 parts by weight of calcium zinc molybdate chloride 5.0 weight Part Ba-Zn stabilizer 3.0 parts by weight Ultraviolet absorber 0.5 parts by weight Isocyanate adhesive 5.0 parts by weight Pigment (titanium oxide) Same as Example 1 except that 3.0 parts by weight was used. Then, a waterproof / noncombustible film material was produced. Formula (1) of the woven glass cloth used for this
The characteristic value a of was: 84.0 and latitude: 73.2. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 1.

Example 6 The composition of the vinyl chloride resin was as follows: Vinyl chloride resin 100.0 parts by weight di-2-ethylhexyl phthalate 85.0 parts by weight antimony trioxide 50.0 parts by weight calcium zinc molybdate 5 0.0 parts by weight Ba-Zn stabilizer 3.0 parts by weight UV absorber 0.5 parts by weight isocyanate adhesive 5.0 parts by weight Pigment (titanium oxide) 3.0 parts by weight A waterproof / noncombustible film material was produced in the same manner as in Example 1. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 1.

[Comparative Example 1] A glass fiber woven fabric was used with the yarn:
Both history is 33.7 tex, density: 41.7 lines / 25.4
mm, weft 28.5 pieces / 25.4 mm, texture: plain weave, mass: 9
A waterproof / nonflammable film material was produced in the same manner as in Example 1 except that the amount was changed to 5 g / m ² . The characteristic value a of the formula (1) of the glass fiber woven fabric used for this is as follows: warp: 84.2, weft: 57.
It was 5. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.

[Comparative Example 2] A glass fiber woven fabric was used with:
Both history is 135.0 tex, density: 22.3 pieces / 2
A waterproof / non-combustible film material was produced in the same manner as in Example 1 except that the weight was changed to 5.4 mm, weft 22.3 pieces / 25.3 mm, texture: plain weave, and mass: 250 g / m ² . The characteristic value a of the formula (1) of the glass fiber woven fabric used for this is as follows:
Latitude: It was 59.6. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.

Comparative Example 3 A waterproof / nonflammable film material was produced in the same manner as in Example 1 except that the compounding amount of di-2-ethylhexyl phthalate was changed to 30 parts by weight. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.

[Comparative Example 4] A waterproof / noncombustible film material was produced in the same manner as in Example 1 except that the compounding amount of di-2-ethylhexyl phthalate was changed to 180 parts by weight. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.
Shown in.

[Comparative Example 5] A waterproof / noncombustible membrane material was produced in the same manner as in Example 1 except that vinyl chloride paste sol was coated on both sides of the base fabric at 300 g / m ^{2 on} each side. This waterproof / noncombustible film material was subjected to the above test.
The results are shown in Table 2.

[Comparative Example 6] A waterproof / noncombustible membrane material was produced in the same manner as in Example 1 except that vinyl chloride paste sol was coated on both sides of the base fabric at 35 g / m ^{2 on} each side. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.

[Comparative Example 7] The following composition: Vinyl chloride resin 100.0 parts by weight di-2-ethylhexyl phthalate 85.0 parts by weight antimony trioxide 50.0 parts by weight aluminum hydroxide 150.0 parts by weight Ba-Zn system Stabilizer 3.0 parts by weight Ultraviolet absorber 0.5 parts by weight Isocyanate adhesive 5.0 parts by weight Pigment (titanium oxide) 3.0 parts by weight of vinyl chloride resin paste sol, 240 g on each side of the base fabric, 240 g A waterproof / noncombustible film material was produced in the same manner as in Example 5 except that the coating was carried out at a rate of / m ² . This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.

[Comparative Example 8] The following composition: Vinyl chloride resin 100.0 parts by weight Di-2-ethylhexyl phthalate 85.0 parts by weight Ba-Zn stabilizer 3.0 parts by weight UV absorber 0.5 parts by weight Isocyanate Adhesive system 5.0 parts by weight Pigment (titanium oxide) 3.0 parts by weight Vinyl chloride resin paste sol containing no inorganic flame retardant 200 g / m ^{2 on} each side, coated on both sides of the base fabric A waterproof / noncombustible film material was produced in the same manner as in Example 5. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.

Comparative Example 9 The following composition: Vinyl chloride resin 100.0 parts by weight di-2-ethylhexyl phthalate 60.0 parts by weight tricresyl phosphate 30.0 parts by weight Ba-Zn stabilizer 3.0 parts by weight Part UV absorber 0.5 parts by weight Isocyanate adhesive 5.0 parts by weight Pigment (titanium oxide) 3.0 parts by weight of an organic flame retardant is blended, and a vinyl chloride resin paste sol containing no inorganic flame retardant is prepared. A waterproof / nonflammable film material was produced in the same manner as in Example 5 except that the film was used. This waterproof / noncombustible film material was subjected to the above test. The results are shown in Table 2.

[0038]

[Table 1]

[0039]

[Table 2]

As can be seen from Examples 1 to 6, the waterproof / noncombustible film material of the present invention is contained in the waterproof resin coating layer with the specific characteristic value a of the warp and weft of the fabric for the base cloth. Due to the synergistic effect of a specified amount of plasticizer and inorganic flame retardant and a specified total dry mass of vinyl chloride resin and plasticizer, it is excellent in waterproofness, heat-sealing property and flex resistance, and also noncombustible of noncombustible materials. And flame retardancy requirements were met. On the other hand, in Comparative Examples 1 and 2, pinholes were generated after the combustion test. This is because the value of the characteristic a of the formula (1) was less than 60 for the glass fiber woven fabric used as the base fabric. In Comparative Example 3, cracking occurred in the waterproof resin coating layer in the bending test. It is considered that this is because the blending amount of the plasticizer in the vinyl chloride resin layer is less than 40 parts by weight. In Comparative Example 4, 150 in the waterproof resin layer
Since the plasticizer is blended in an amount exceeding the above range, the resin strength was lowered and the peel strength of the heat-sealed portion was lowered. In Comparative Example 5, since the total dry mass of the vinyl chloride resin and the plasticizer in the waterproof resin coating layer exceeds 400 g / m ² , the total calorific value exceeds 8 MJ / m ² , and the maximum The heat generation rate also exceeded 200 kW / m ² after 10 seconds. In Comparative Example 6, the coating amount of the waterproof resin coating layer was small, the total dry mass of the vinyl chloride resin and the plasticizer was less than 60 g / m ² , and the waterproof property and heat fusion property were insufficient. In Comparative Example 7, since the amount of the inorganic flame retardant in the vinyl chloride resin-containing waterproof resin coating layer was more than 150 parts by weight with respect to 100 parts by weight of the vinyl chloride resin, flexibility and resin strength were lowered, and the bending test was conducted. In addition, cracks were generated, and the heat fusion test also showed insufficient peel strength and peeling state. Further, in Comparative Example 8, since the vinyl chloride resin layer did not contain an inorganic flame retardant, the flame retardancy of the film material was insufficient. In addition, the occurrence of pinholes was confirmed after the combustion test. Further, as seen in Comparative Example 9, in the case of the vinyl chloride resin layer in which the flame retardant was an organic flame retardant, the flame retardancy of the film material was sufficient, but the occurrence of pinholes was prevented. I couldn't. When the flame retardant added to the vinyl chloride resin layer is an organic flame retardant, it is not possible to prevent the occurrence of pinholes after the combustion test. This is because the organic flame retardant is released from the film material after the combustion test and falls off, whereas the inorganic flame retardant remains in the film material after the combustion test and plays a role as a kind of sealant. It is considered to be a thing.

[0041]

The waterproof / noncombustible film material of the present invention provides a waterproof space in fireproof areas, semi-fireproof areas, roof noncombustible areas, urban areas, urban areas, etc., where building materials are required to be nonflammable. It is widely used for tent type structures that are expanded for the purpose.

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B32B 27/30 101 B32B 27/30 101 C08K 3/00 C08K 3/00 5/00 5/00 C08L 27 / 06 C08L 27/06 D03D 15/12 D03D 15/12 A D06M 11/47 D06M 13/228 11/48 101: 00 13/228 11/12 // D06M 101: 00 F term (reference) 4F100 AA00B AA20A AB20B AB22B AG00A AK15B BA02 CA04B CA08B DG01A DG12A GB07 JA20A JD05B JJ07A JM01 4J002 BB042 BB062 BB072 BD031 BD04 CF032 DE127 BA187 A05 ABA4A2 ABA4A2 A4 A2 A4 A2 A4 A2 A4 A4 A2 A4 A4 A4 A2 A4 A2 A4 A4 A2 A4 A4 A4 A2 A4 A2 A4 A4 A4 A2 A4 A4 A2 A4 A4 A2 A4 A4 A4 A2 A4 A2 A4 A2 A4 A2 A4 A4 A0 A4 A3 A4 A3 A4 A2 A4 A4 A4 A of A of A4 AC14 BA01 BA02 CA06 CA15 DA27 EB00

Claims (3)

[Claims] 1. A base fabric containing a woven fabric made of non-combustible inorganic fibers, and a waterproof resin coating layer formed on at least one surface of the base fabric and containing a vinyl chloride resin as a main component. Characteristic value a represented by the following formula (I) of the warp and weft of the woven fabric for base fabric: a = K / N- ^0.7 (I) [wherein K is represented by the following formula (II) of the warp or weft Represents a cover factor, K = n / √N (II) n represents the density of warp or weft per 25.4 mm (1 inch) of the woven fabric, and N represents the tex fineness of the warp or weft]] Both are in the range of 60 to 150, the waterproof resin coating layer, together with the vinyl chloride resin,
With respect to 100 parts by weight thereof, 40 to 150 parts by weight of a plasticizer and 3 to 150 parts by weight of an inorganic flame retardant are included, and the vinyl chloride resin and the plasticizer contained in the waterproof resin coating layer. Has a total dry mass of 60 to 400 g / m
A waterproof and non-combustible film material characterized by being within the range of ² . 2. The waterproof / non-combustible film material according to claim 1, wherein the non-combustible inorganic fiber for a base cloth comprises at least one selected from glass fiber and silica fiber. 3. The waterproof / noncombustible film material according to claim 1, wherein the inorganic flame retardant is composed of at least one selected from antimony compounds and molybdenum compounds.