JP7759301B2 - Smoke-proof hanging wall construction method and smoke-proof hanging wall sheet - Google Patents

Description

The present invention relates to a sheet for smoke barrier hanging walls and a smoke barrier hanging wall.

Smoke barriers are installed in the ceilings of buildings and other structures to prevent the spread of smoke in the event of a fire and ensure evacuation time. Traditionally, most of these were made of glass, but in recent years, secondary disasters caused by falling glass have become a problem, and as a result, smoke barriers made of non-flammable resin sheets are becoming more common.

Smoke barrier hanging walls made of non-combustible sheets can become statically charged, causing dust present in the air inside buildings where the smoke barrier hanging walls are installed to adhere to the surface of the non-combustible sheets, resulting in a poor appearance.

To address this issue, for example, Patent Document 1 (JP 2019-98646 A) discloses a non-combustible sheet equipped with an antistatic layer containing metal or metal oxide that serves as a surface layer when the non-combustible sheet is in use.

Japanese Patent Application Laid-Open No. 2019-98646

However, providing such an antistatic layer on a noncombustible sheet increases the manufacturing cost of the noncombustible sheet. Furthermore, it is not necessarily necessary to provide an antistatic layer on the main body of the noncombustible sheet in order to prevent dust from adhering to the noncombustible sheet.

The present invention therefore aims to provide a low-cost non-combustible sheet that can effectively reduce dust adhesion, and a smoke barrier hanging wall equipped with this non-combustible sheet.

After extensive research, the inventors discovered that by providing an antistatic agent layer on the protective film that is peeled off when the non-combustible sheet is used, rather than on the non-combustible sheet itself, it is possible to effectively reduce the adhesion of dust to the non-combustible sheet after installation, leading to the completion of the present invention.

That is, the present invention provides:
a non-combustible sheet including a glass cloth and a resin layer at least partially impregnated into the glass cloth;
a protective film that covers and protects the non-combustible sheet and is peeled off when the non-combustible sheet is used;
the protective film includes a layer to which an antistatic agent is added;
The present invention provides a sheet for smoke-proof hanging walls characterized by the above.
Here, the layer to which the antistatic agent is added may be a surface layer, an adhesive layer, or an intermediate layer of the protective film.

The smoke barrier hanging wall sheet of the present invention, which has this configuration, has antistatic properties imparted to the protective film, making it less likely for static electricity to be generated on the non-flammable sheet during installation. This effectively prevents dust and other particles from adhering. Furthermore, since an antistatic agent layer is provided on the protective film side, it can be manufactured at low cost.

In the sheet for smoke barrier hanging walls of the present invention, it is preferable that the surface resistance value of the protective film is 1.0×10 ¹² Ω/□ or less.

With the smoke barrier hanging wall sheet of the present invention having this configuration, the protective film has a low surface resistance value that provides sufficient antistatic properties, thereby providing good resistance to dust adhesion.

In addition, in the sheet for smoke barrier hanging walls of the present invention, it is preferable that the absolute value of the electrification voltage of the noncombustible sheet after the peel test described below is 0.4 kV or less.
(Peeling test) The protective film is attached to the non-combustible sheet and left to stand for 2 hours or more in an environment of a temperature of 23±2° C. and a humidity of (50±5)%, and then the protective film is peeled off at a speed of 3 m/min.

With the smoke barrier hanging wall sheet of the present invention having this configuration, the charged voltage of the non-combustible sheet is sufficiently low after the protective film is peeled off, and sufficient discharge occurs. Therefore, good dust adhesion prevention properties can be achieved.

The present invention also provides a smoke barrier hanging wall comprising any of the smoke barrier hanging wall sheets described above.

With the smoke barrier hanging wall of the present invention having this configuration, the protective film is endowed with antistatic properties, making it less likely for static electricity to be generated on the non-combustible sheet during installation. This effectively reduces the adhesion of dust and other particles, ensuring that the appearance is not marred after installation. Furthermore, since the non-combustible sheet can be manufactured at low cost, the manufacturing costs of the smoke barrier hanging wall can be reduced.

This invention makes it possible to obtain a non-combustible sheet that effectively reduces dust adhesion at low cost. This makes it easy to install smoke barrier hanging walls.

1 is a schematic diagram of a smoke barrier hanging wall 1 according to a first embodiment. 1 is a cross-sectional view showing an example of a sheet 13 for a smoke barrier hanging wall used in embodiment 1. FIG. FIG. 10 is a schematic diagram of a smoke barrier hanging wall 2 according to a second embodiment. FIG. 10 is a cross-sectional view showing an example of a sheet 23 for a smoke barrier hanging wall used in embodiment 2. FIG. 1 is an explanatory diagram of a method for measuring peeling electrification voltage.

Representative embodiments of the smoke barrier hanging wall sheet and smoke barrier according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to those shown in the drawings. Furthermore, since the drawings are intended to conceptually explain the present invention, the proportions and quantities of parts may be exaggerated or simplified as necessary to facilitate understanding. Furthermore, in the following description, the same or equivalent parts will be designated by the same reference numerals, and duplicate explanations may be omitted.

1. Embodiment 1
A smoke barrier hanging wall 1 according to embodiment 1 will be described with reference to Fig. 1 and Fig. 2. Fig. 1 is a schematic diagram of the smoke barrier hanging wall 1 according to embodiment 1, and Fig. 2 is a cross-sectional view showing an example of a sheet 13 for the smoke barrier hanging wall used in embodiment 1.

1-1. About the Smoke Barrier Hanging Wall 1 The smoke barrier hanging wall 1 is attached to a ceiling or the like so as to extend downward in a substantially vertical direction, and serves to prevent the flow and diffusion of smoke in the event of a fire.
As shown in Figure 1, the smoke barrier hanging wall 1 is a panel-type smoke barrier hanging wall that includes a substantially rectangular frame 11 made of a metal material such as aluminum, and a sheet material (smoke barrier hanging wall sheet 13) attached to the frame 11.

The frame 11 includes a pair of opposing vertical frames 111, 112 and a pair of opposing horizontal frames 113, 114. The frame 11 may be configured so that its length in the vertical (up-down) and horizontal directions can be adjusted using a vertical frame position adjustment means (not shown) and a horizontal frame position adjustment means (not shown).

1-2. Regarding the sheet 13 for the smoke barrier hanging wall As shown in Fig. 2, the sheet 13 for the smoke barrier hanging wall is a laminated body in which a non-combustible sheet 131 is sandwiched between protective films 132. When constructing the smoke barrier hanging wall 1, the protective film 132 is peeled off and only the non-combustible sheet 131 is constructed.

Specifically, the non-combustible sheet 131 includes glass cloth (glass fiber cloth) 133 and a resin layer 134 in which at least a portion of the glass cloth 133 is impregnated. In other words, the non-combustible sheet 131 can also be described as a laminate of the glass cloth 133 and the resin layer 134.

The glass cloth 133 is a sheet-like material made of multiple glass fibers that are intertwined to form a single piece of cloth. For example, it may be made of multiple warp threads and multiple weft threads made of glass fibers. There are no particular restrictions on the weave, and examples include plain weave, satin weave, twill weave, basket weave, and rib weave.

The resin forming the resin layer 134 may be either a thermosetting resin or a thermoplastic resin, provided that the effects of the present invention are not impaired. However, from the standpoint of non-flammability, a thermosetting resin is preferred, such as vinyl ester resin, urethane acrylate resin, fluorene acrylate resin, unsaturated polyester resin, curable acrylic resin, or epoxy resin. Of these, vinyl ester resin is preferred due to its excellent transparency after impregnation of the glass cloth.

Furthermore, the resin of the resin layer 134 fills the gaps between the multiple glass fibers that make up the glass cloth 133, and may extend from one surface side portion of the resin layer 134 to the other surface side portion through these gaps.

In this embodiment, the resin layer 134 is formed on both surfaces (outer surfaces) of the glass cloth 133, but this is not limited to this and it may be formed on one surface or as an intermediate layer.
In order to protect the glass cloth 133, a protective layer (not shown) such as a PET film may be laminated on the surface of the glass cloth 133.

The protective film 132 is laminated (attached) to the non-combustible sheet 131 to cover and protect it, and is peeled off when the non-combustible sheet 131 is to be used. The protective film 132 includes a layer 136 to which an antistatic agent has been added. In other words, the protective film 132 can also be described as an anti-static film to which anti-static (anti-static) properties have been added. The anti-static agent may also be added to the non-combustible sheet 131, but from the perspective of cost reduction, etc., it is preferably added only to the protective film 132.

For example, protective film 132 is configured as a laminate of a layer (layer 136) in which a polymeric antistatic agent is added to a base resin such as polyethylene, an intermediate layer made of a base resin such as polyethylene, and an adhesive layer made of an adhesive resin such as ethylene vinyl acetate copolymer resin (EVA). However, the number of layers making up protective film 132 can be adjusted as appropriate as long as the effects of the present invention are not impaired, and the antistatic agent may be added to any layer of protective film 132, not limited to the outer layer (surface layer), but also to the adhesive layer or intermediate layer.

Examples of polymeric antistatic agents include polymeric materials that incorporate hydrophilic segments such as polyethylene oxide (PEO) chains as conductive units within the molecule, and a variety of types can be used as long as the effects of the present invention are not impaired. For example, non-ionic types including polyether ester amide types, ethylene oxide-epichlorohydrin types, and polyether ester types, anionic types including sulfonic acid types such as polystyrene sulfonic acid, and cationic types including quaternary ammonium salt types can all be used. Molecules in the polymer chain may also be bonded by metal ions.

Specific examples include polyethylene oxide, polypropylene oxide, polyether ester amide, ethylene oxide-epihalohydrin copolymer, ethylene (meth)acrylate copolymer, methoxypolyethylene glycol (meth)acrylate copolymer, quaternary ammonium base-containing (meth)acrylate copolymer, quaternary ammonium base-containing maleimide copolymer, quaternary ammonium base-containing methacrylimide copolymer, sodium polystyrene sulfonate, carbobetaine graft copolymer, polyacrylate, polystyrene sulfonate, polystyrene sulfonate amine salt, alternating block copolymers of styrene polymer blocks and hydrophilic polymer blocks, polystyrene resins grafted with polyethylene glycol-incorporated (meth)acrylic acid ester, hydrophilic polymers with polyether compounds as antistatic segments, polymaleate, polymaleate amine salt, cationic polymers primarily composed of ammonium ions, polyamide polyether copolymers, polyolefin polyether copolymers, polyether ester amides, and polyether esters.

In addition, antistatic agents are not limited to polymeric (organic) types, and may also be metallic (inorganic) types. Examples of metal elements that make up metal-based antistatic agents include Ag, Ni, Cu, Sn, Sb, Al, In, and Ti, and examples of metal elements that have a standard electrode potential of less than 0 eV when in the pure metal form. Examples of metal compounds include metal oxides such as antimony pentoxide, tin oxide, zinc oxide, indium oxide, antimony-doped indium oxide, tin-doped indium oxide, and silver oxide.

The adhesive layer is not limited to EVA, but can also be made of other materials such as polyolefin, synthetic rubber, polyurethane, polyamide, polyester, and acrylic.

From the viewpoint of ensuring resistance to adhesion of dust and the like by antistatic properties, the surface resistance value of the protective film 132 is preferably 1.0×10 ¹² Ω/□ or less, and more preferably 1.0×10 ⁹ to 1.0×10 ¹² Ω/□, and even more preferably 1.0×10 ¹⁰ to 1.0×10 ¹² Ω/□. Furthermore, the absolute value of the electrostatic voltage of the noncombustible sheet 131 immediately after peeling off the protective film 132 is preferably 0.4 kV or less, and especially preferably 0.2 kV or less. The lower limit may be 0 kV.

1-3. Construction of the Smoke Barrier Hanging Wall 1 Next, the construction method of the smoke barrier hanging wall 1 will be explained.
First, prepare the smoke barrier hanging wall 1. The smoke barrier hanging wall 1 may be of a type in which the smoke barrier hanging wall sheet 13 is integrated with the frame 11 at the time of shipment, or may be of a type in which the smoke barrier hanging wall sheet 13 is attached to the frame 11 at the construction site.

At the site, the protective film 132 is peeled off from the non-combustible sheet 131 of the smoke barrier hanging wall sheet 13. At this time, it is assumed that sufficient discharge has occurred several minutes after the protective film 132 has been peeled off. In other words, the antistatic agent added to the protective film 132 removes static electricity that is generated when the protective film 132 is peeled off, effectively preventing dust and other particles from adhering to the non-combustible sheet 131.

For smoke-proof hanging wall sheets 13 that are attached to the frame 11 on-site, a non-combustible sheet 131 is also attached to the frame 11 using a fixing means such as double-sided tape. At this time, the non-combustible sheet 131 is sufficiently discharged, preventing it from sticking due to static electricity.

Furthermore, if the frame 11 has vertical frame position adjustment means (not shown) and horizontal frame position adjustment means (not shown), these means can be used to adjust the positions of the vertical frames 111, 112 and horizontal frames 113, 114, thereby adjusting the tension applied to the non-combustible sheet 131 and eliminating wrinkles and sagging in the non-combustible sheet 131.

Smoke barrier sections 1 can be set in the desired location by connecting multiple smoke barrier hanging walls 1 assembled in this way with rails, joints, etc. and attaching them so that they extend vertically downward from the ceiling, etc. The attached non-combustible sheet 131 is unlikely to become electrically charged by the airflow within the room, so dust and other particles can be prevented from adhering to the non-combustible sheet 13 even after the smoke barrier hanging walls 1 are installed.

1-4. Effects of Embodiment 1 According to Embodiment 1, the protective film 132 is provided with antistatic properties, so static electricity is less likely to be generated on the noncombustible sheet 131 during installation. Therefore, dust is less likely to adhere to the noncombustible sheet 131 during installation and after installation. Therefore, the installation of the noncombustible sheet 131 can be easily performed, and the appearance of the noncombustible sheet 131 can be maintained by preventing the adhesion of dust and the like even after installation.
The non-combustible sheet 131 is transparent and highly visible, and is also lightweight and will not break even if dropped, so it goes without saying that it is safe.

2. Embodiment 2
The smoke barrier hanging wall 2 according to the second embodiment will be described with reference to Fig. 3 and Fig. 4. However, the following description will focus on the differences from the first embodiment. Fig. 3 is a schematic diagram of the smoke barrier hanging wall 2 according to the second embodiment, and Fig. 4 is a cross-sectional view showing an example of a sheet 23 for the smoke barrier hanging wall used in the second embodiment.

3, the smoke barrier hanging wall 2 includes a pair of opposing vertical frames 21, 22 and a smoke barrier hanging wall sheet 23 that is fixed in a tensioned state between the vertical frames 21, 22. In other words, the smoke barrier hanging wall 2 is a tension type.

2-2. Regarding the smoke barrier hanging wall sheet 23 As shown in Fig. 4, the smoke barrier hanging wall sheet 23 is a laminate in which a non-combustible sheet 231 is sandwiched between protective films 232 (antistatic films). However, the protective film 232 may be formed on only one surface of the non-combustible sheet 231. When constructing the smoke barrier hanging wall 2, the protective film 232 is peeled off from the non-combustible sheet 231, and only the non-combustible sheet 231 is constructed.

The tension-type non-combustible sheet 231 includes a glass cloth 233, a resin layer 234 in which the glass cloth 233 is at least partially impregnated, and laminated PET (polyethylene terephthalate) film layers 235 on both surfaces. The laminated PET film layers 235 provide the non-combustible sheet 231 with the rigidity to withstand the tension applied during installation.

The protective film 232 covers and protects the non-combustible sheet 231 and is peeled off when the non-combustible sheet 231 is used. The protective film 232 includes a layer 236 to which an antistatic agent is added.

Protective film 232 is constructed as a laminate of an outer layer (layer 236) made of polyethylene with an antistatic agent added, an intermediate layer made of polyethylene, and an adhesive layer made of EVA. However, the antistatic agent does not have to be added to the outer layer (surface layer) of protective film 232; it can also be added to the adhesive layer or intermediate layer. As mentioned above, various antistatic agents can be added, and various materials can be used for the adhesive layer, not just EVA.

From the viewpoint of preventing adhesion of dust and the like, the surface resistance value of the protective film 232 is preferably 10 ¹² Ω/□ or less, more preferably about 1.0×10 ⁹ to 1.0×10 ¹² Ω/□, and more preferably 1.0×10 ¹⁰ to 1.0×10 ¹² Ω/□. Furthermore, the absolute value of the electrostatic potential of the noncombustible sheet 231 immediately after peeling off the protective film 232 is preferably 0.4 kV or less, and particularly preferably 0.2 kV or less.

2-3. Construction of the Smoke Barrier Hanging Wall 2 Next, the construction method of the smoke barrier hanging wall 2 will be explained.
First, the vertical frames 21, 22 and the sheet 23 for the smoke barrier hanging wall that constitute the smoke barrier hanging wall 2 are prepared.
At the work site, the protective film 232 is peeled off from the non-combustible sheet 231 of the smoke barrier hanging wall sheet 23. At this time, the antistatic agent added to the protective film 232 removes static electricity that is generated when the protective film 232 is peeled off, thereby effectively preventing the adhesion of dust and the like.

Next, the non-combustible sheets 231 are attached to the vertical frames 21 and 22. This makes the work easier because the non-combustible sheets 231 are static-free and do not stick to each other or other objects.

Then, by attaching the vertical frames 21, 22 to a supporting material such as a wall, the smoke-proof compartment can be set in the desired position. The attached non-combustible sheet 231 is unlikely to become electrically charged by the airflow within the room, so dust and other particles are prevented from adhering to it even after installation.

2-4. Effects of Embodiment 2 According to Embodiment 2, the protective film 232 is provided with antistatic properties, so static electricity is less likely to be generated on the noncombustible sheet 231 during installation. Therefore, dust is less likely to accumulate on the noncombustible sheet 231 during installation and after installation. Therefore, the installation of the noncombustible sheet 231 can be easily performed, and the appearance of the noncombustible sheet 231 can be maintained even after installation.

Although typical embodiments of the present invention have been described above, the present invention is not limited to these, and various design modifications are possible. It goes without saying that such modified forms (variations) of the design are also included in the technical scope of the present invention.
For example, the smoke-proof hanging wall sheet 13 of the first embodiment may be attached to the vertical frames 21 and 22 of the second embodiment, or the smoke-proof hanging wall sheet 23 of the second embodiment may be attached to the frame 11 of the first embodiment.

The present invention will be described in detail below with reference to examples and comparative examples, but the present invention is not limited to these examples.

(1) Protective Film (1-1) As the protective film 1, a PE (polyethylene) antistatic protective film (manufactured by Enshu Chemical Industry Co., Ltd., product number: EH-50-10CN, transparent, containing antistatic agent) having the following specifications was used.
- Specifications of PE antistatic protective film Outer layer: Polyethylene + polymeric antistatic agent Middle layer: Polyethylene (PE)
Adhesive layer: ethylene vinyl acetate copolymer resin (EVA)
(Total thickness: 50 μm)
That is, the PE antistatic protective film is a three-layer co-extruded film with an antistatic agent added to the surface layer, and the antistatic agent used is a polymeric antistatic agent (a type of resin in which the molecules of copolymers such as EMA (ethylene-methyl acrylate copolymer) and EAA (ethylene-acrylic acid copolymer) are bonded together by metal ions).

Here, the surface resistance of the protective film 1 was measured by the following method (the same applies to the following protective films) and was found to be 1.0×10 ¹⁰ Ω/□.
- Measuring equipment: Nitto Seiko Analic Co., Ltd., product number: MCP-HT450
- Measurement method: Based on JIS K 6911, measured at an applied voltage of 500V in an environment of temperature 23±2°C and humidity (50±5)%.

(1-2) As the protective film 2, a polyolefin antistatic protective film (manufactured by Nitto Denko Corporation, product number: E-MASK RB-100S) having the following specifications was used.
- Specifications of polyolefin antistatic protective film: Polyolefin, organic antistatic agent layer, and acrylic adhesive layer laminated in this order (total thickness: 45 μm)
Surface resistance: 6.3 x 10 ¹¹ Ω/□

(1-3) As a comparative protective film 1, the following PET film (product number: Emblet S, manufactured by Unitika Ltd.) was used.
- PET film specifications: 25 μm thick PET film that has not been subjected to surface treatment such as corona. Surface resistance: >1.0 × 10 ¹³ Ω/□

(1-4) As a comparative protective film 2, the following PE protective film (1) (manufactured by Enshu Chemical Industry Co., Ltd., product number: EH-50-10CN) was used.
- Specifications of PE protective film (1) PE and EVA laminate (total thickness: 50 μm)
Surface resistance: >1.0 x 10 ¹³ Ω/□

(1-5) As a comparative protective film 3, the following PE protective film (2) (manufactured by Nitto Denko Corporation, product number: E-MASK R-50EP) was used.
- Specifications of PE protective film (2) PE and acrylic adhesive laminate (total thickness: 60 μm)
Surface resistance: >1.0 x 10 ¹³ Ω/□

(2) Non-combustible sheet Next, as the non-combustible sheet, a non-combustible sheet for panel corresponding to embodiment 1 and a non-combustible sheet for tension corresponding to embodiment 2 were used. The specifications of the non-combustible sheets used are as follows:
(2-1) Non-flammable sheet for panels: "Dance Smoke N Panel Sheet" manufactured by Takiron C.I. Co., Ltd.
PET (polyethylene terephthalate) film (25 μm),
A non-flammable sheet consisting of a laminate of a glass cloth/vinyl ester resin composite sheet (85 μm) and a PET film (25 μm) laminated in this order.

(2-2) Non-flammable tension sheet: "Dance Smoke N Tension Sheet" manufactured by Takiron C.I. Co., Ltd.
Laminated PET film (PET: 16 μm, acrylic adhesive layer: 15 μm),
A non-flammable sheet consisting of a laminate of glass cloth 133, vinyl ester resin composite sheet (85 μm), and laminated PET film (PET: 16 μm, acrylic adhesive layer: 15 μm) laminated in this order.

<Examples 1 to 4>
The protective film 1 was laminated onto one side of each of the non-combustible sheets 1 and 2 to prepare the smoke barrier hanging sheets 1 and 2 of the present invention.
Furthermore, a protective film 2 was laminated onto one side of each of the non-combustible sheets 1 and 2 to prepare sheets 3 and 4 for smoke-proof hanging walls of the present invention.

<Comparative Examples 1 to 6>
Comparative protective film 1 was laminated onto one side of each of non-combustible sheets 1 and 2 to prepare comparative smoke-proof hanging wall sheets 1 and 2.
Comparative protective film 2 was laminated onto one side of each of non-combustible sheets 1 and 2 to prepare comparative smoke-proof hanging wall sheets 3 and 4.
Furthermore, comparative protective film 3 was laminated onto one side of each of non-combustible sheets 1 and 2 to prepare comparative smoke-proof hanging wall sheets 5 and 6.

[evaluation]
For the smoke-proof hanging wall sheets 1 to 4 of the present invention and the comparative smoke-proof hanging wall sheets 1 to 6, a peeling test was carried out to peel the protective film from each noncombustible sheet, and the charged voltage of the noncombustible sheet after peeling was measured.
The test conditions were as follows (see FIG. 5):
- Measuring equipment: SIMCO static electricity measuring instrument FMX-003
- Measurement conditions: After preparation, the smoke barrier hanging wall sheets 1 to 4 and the comparative smoke barrier hanging wall sheets 1 to 6 prepared as described above were left for at least two hours in an environment with a temperature of 23±2°C and a humidity of (50±5)%. Then, under the same environment, the protective film was peeled off by hand at a speed of 3 m/min, and the maximum peel electrification voltage was read. The distance D between the measuring device M and the noncombustible sheet was 100 mm. Measurements were taken at three points on an A4-sized sample: the corner, the center, and the diagonal.
The measurement results are shown in Table 1 together with the surface resistance value of each protective film.

As can be seen from Table 1, the surface resistance values of protective films 1 and 2 according to Examples 1 to 4 were 1.0×10 ¹² Ω/□ or less, whereas the surface resistance values of comparative protective films 1 to 3 according to comparative examples 1 to 6 were greater than 1.0×10 ¹³ Ω/□. Generally, the lower the surface resistance value of a protective film, the better the antistatic properties. Therefore, it can be seen that the protective films according to Examples 1 to 4 exhibited better antistatic properties than the comparative protective films 1 to 3 according to comparative examples 1 to 6.

It is generally known that the smaller the absolute value of the electrostatic charge, the better the resistance to adhesion of dust and the like. Table 1 shows that in Examples 1 to 4, the electrostatic charge of Noncombustible Sheets 1 and 2 after Protective Films 1 and 2 were peeled off was smaller than in Comparative Examples 1 to 6, demonstrating sufficient resistance to adhesion of dust and the like. It was also confirmed that Noncombustible Sheets 1 and 2 according to Examples 1 to 4 completed discharge within a few minutes of peeling off Protective Films 1 and 2.

1, 2 Smoke barrier hanging wall 13, 23 Smoke barrier hanging wall sheet 131, 231 Non-combustible sheet 132, 232 Protective film 133, 233 Glass cloth 134, 234 Resin layer 136, 236 Layer containing antistatic agent

Claims (5)

a non-combustible sheet including a glass cloth and a resin layer at least partially impregnated into the glass cloth;
a protective film that covers and protects the non-combustible sheet and is peeled off when the non-combustible sheet is used;
a frame to which the non-flammable sheet is attached;
Equipped with
When constructing a smoke barrier using a sheet for a smoke barrier, the protective film of which contains a layer to which an antistatic agent is added,
The protective film is peeled off from the non-combustible sheet in advance, and the discharge is performed after the application .
A construction method for a smoke-proof hanging wall characterized by the above. the surface resistance value of the protective film is 1.0×10 ¹² Ω/□ or less;
2. A method for constructing a smoke barrier hanging wall according to claim 1. the absolute value of the electrostatic potential of the non-combustible sheet after the peel test described below is 0.4 kV or less;
3. A method for constructing a smoke barrier hanging wall according to claim 1 or 2 , characterized by:
(Peeling test) The protective film is attached to the non-combustible sheet and left to stand for 2 hours or more in an environment of a temperature of 23±2° C. and a humidity of (50±5)%, and then the protective film is peeled off at a speed of 3 m/min. a non-combustible sheet including a glass cloth and a resin layer at least partially impregnated into the glass cloth, the non-combustible sheet being attached to the frame;
a protective film that covers and protects the non-combustible sheet and is peeled off when the non-combustible sheet is used;
Equipped with
the resin forming the resin layer is a vinyl ester resin, a urethane acrylate resin, a fluorene acrylate resin, an unsaturated polyester resin, a curable acrylic resin, or an epoxy resin;
the protective film includes a layer containing an antistatic agent and has a surface resistance value of 1.0×10 ⁹ Ω to 1.0×10 ¹² Ω/□;
the absolute value of the electrostatic potential of the non-combustible sheet after the peel test described below is 0.4 kV or less;
A smoke-proof sheet for hanging walls characterized by the above .
(Peeling test) The protective film is attached to the non-combustible sheet and left to stand for 2 hours or more in an environment of a temperature of 23±2° C. and a humidity of (50±5)%, and then the protective film is peeled off at a speed of 3 m/min. the absolute value of the electrostatic potential of the non-combustible sheet after the peel test described below is 0.2 kV or less;
5. The sheet for a smoke barrier hanging wall according to claim 4,