JIS product specification standard[Gypsum boards JIS A 6901:2014] [Sound absorbing material JIS A6301:2015]
| Thickness (mm) | 9.5 | 12.5 | 15.0 | |
| Mass per unit area (kg/m2) |
6.2〜9.0 | 8.1〜11.7 | 9.8〜14.0 | |
| Specific gravity | 0.65〜0.90 | |||
| Moisture percentage (%) | 3 or less | |||
| Bending fracture load N(kgf) | Length direction | 360 (36.7) or higher | 500 (51.0) or higher | 650 (66.3) or higher |
| Width direction | 140 (14.3) or higher | 180 (18.4) or higher | 220 (22.4) or higher | |
| Incombustibility or exothermicity | 2nd grade incombustibility or 2nd grade exothermicity or higher | 1st grade incombustibility or 1st grade exothermicity | 1st grade incombustibility or 1st grade exothermicity | |
| Thermal resistance m2 K/W | 0.043 or higher | 0.057 or higher | 0.068 or higher | |
●Regular Hard Type Gypsum Boards (GB-R-H).Permanent stocks: 9.5mm and 12.5mm models.
| Thickness (mm) | 9.5 | 12.5 | 15.0 | |
| Mass per unit area (kg/m2) |
8.6〜14.5 | 11.3〜18.9 | 13.5〜22.5 | |
| Specific gravity | 0.90〜1.45 | |||
| Moisture percentage (%) | 3 or less | |||
| Bending fracture load N(kgf) | Length direction | 500(51.0) or higher | 700 (71.4) or higher | 910 (92.8) or higher |
| Width direction | 200(20.4) or higher | 250(25.5) or higher | 310(31..6) or higher | |
| Shock resistance | Diameter of the dent should be 20 mm or less and should not be penetrated by cracks. | |||
| Incombustibility or exothermicity |
2nd grade incombustibility or 2nd grade exothermicity or higher |
1st grade incombustibility or 1st grade exothermicity |
1st grade incombustibility or 1st grade exothermicity |
|
| Thermal resistance m2・K/W | 0.026 or higher | 0.035 or higher | 0.042 or higher | |
●Fire Resistant Gypsum Boards (GB-F). Permanent stocks: 9.5mm, 15.0mm and 21.0mm models.
| Thickness (mm) | 12.5 | 15.0 | 16.0 | 18.0 | 21.0 | 25.0 | |
| Mass per unit area (kg/m2) |
9.4〜12.4 | 11.3〜14.7 | 12.0〜15.7 | 13.5〜17.6 | 15.8〜20.4 | 18.8〜24.2 | |
| Specific gravity | 0.75〜0.95 | ||||||
| Moisture percentage (%) | 3 or less | ||||||
| Bending fracture load N(kgf) | Length direction | 500 (51.0) or higher |
650 (66.3) or higher |
680 (69.4) or higher |
750 (76.5) or higher |
850 (86.7) or higher |
1000 (102.0) or higher |
| Width direction | 180 (18.4) or higher |
220 (22.4) or higher |
230 (23.5) or higher |
270 (27.6) or higher |
320 (32.7) or higher |
380 (36.8) or higher |
|
| Shock resistance | Diameter of the dent should be 25 mm or less and should not be penetrated by cracks. | ||||||
| Fire resistance | Should not break and fall down. | ||||||
| Incombustibility or exothermicity |
1st grade incombustibility or 1st grade exothermicity |
||||||
| Thermal resistance m2・K/W | 0.052 or higher |
0.063 or higher |
0.067 or higher |
0.075 or higher |
0.088 or higher |
0.104 or higher |
|
●Gypsum Sheathing Boards (GB-S). Permanent stocks: 9.5mm and 12.5mm models.
| Thickness (mm) | 9.5 | 12.5 | 15.0 | |
| Mass per unit area (kg/m2) |
6.2〜9.0 | 8.1〜11.7 | 9.8〜14.0 | |
| Specific gravity | 0.65〜0.90 | |||
| Moisture percentage (%) | 3 or less | |||
| Bending fracture load N(kgf) Note(1) |
When dry | 360（36.7）or higher | 500(51.0) or higher | 650（66.3）or higher |
| When wet | 220（22.4）or higher | 300（30.6）or higher | 390（39.8）or higher | |
| Peeling resistance during water absorption | Inner gypsum and base paper should not peel off. | |||
| Water absorption performance | Water absorption ratio (%) | 10 or less | ||
| Surface side water absorption mass (g) | 2 or less | |||
| Incombustibility or exothermicity |
2nd grade incombustibility or 2nd grade exothermicity or higher | |||
| Thermal resistance m2・K/W | 0.040 or higher | 0.052 or higher | 0.063 or higher | |
●Fire-Resistant Gypsum Board - Structure Type (GB-St)
| In addition to compliance with the requirements of fire resistant gypsum board (GB - F), models of any thickness should satisfy the following nailed side resistance requirements. |
| Nailed side surface load (N) | Both direction of length and direction of width | A-type Note(2) | 750 or higher | ||
| B-type | 500 or higher | ||||
●Gypsum Lath Board (GB-L)
| Thickness (mm) | 9.5 | |
| Mass per unit area (kg/m2) |
6.2〜9.0 | |
| Specific gravity | 0.65〜0.90 | |
| Moisture percentage (%) | 3 or less | |
| Bending fracture load N(kgf) | Length direction | 180（18.4）or higher |
| Width direction | 125（12.8）or higher | |
●Decorated Gypsum Boards (GB-D). Permanent stocks: 9.5mm and 12.5mm models.
| Thickness (mm) | 9.5 | 12.5 | 15.0 | |
| Mass per unit area (kg/m2) |
6.2〜9.0 | 8.1〜11.7 | 9.8〜14.0 | |
| Specific gravity | 0.65〜0.90 | |||
| Moisture percentage (%) | 3 or less | |||
| Bending fracture load N(kgf) Note(3) | Length direction | 360（36.7）or higher | 500(51.0) or higher | 650（66.3）or higher |
| Width direction | 140（14.3）or higher | 180（18.4）or higher | 220（22.4）or higher | |
| Discoloration resistance | Deemed to pass the discoloration test if within no. 3 in the gray discoloration scale. Also, the surface should not crack, bulge or wrinkle. | |||
| Shock resistance Note(4) | Diameter of the dent should be 25 mm or less and should not be penetrated by cracks. | |||
| Incombustibility or exothermicity |
2nd grade incombustibility or 2nd grade exothermicity or higher | 1st grade incombustibility or 1st grade exothermicity |
1st grade incombustibility or 1st grade exothermicity |
|
| Thermal resistance m2・K/W | 0.043 or higher |
0.057 or higher |
0.068 or higher |
|
Note(4): Should not apply to surface embossing processed models.
●Gypsum Board - Noncombustible Type (GB-NC)
| Presence or absence of surface decoration | Present | Absent | ||
| Mass per unit area (kg/m2) |
6.2〜9.0 | |||
| Specific gravity | 0.65〜0.90 | |||
| Thickness (mm) | 9.5 | |||
| Moisture percentage (%) | 3 or less | |||
| Bending fracture load N(kgf) Note(5) | Length direction | 360（36.7）or higher | ||
| Width direction | 140（14.3）or higher | |||
| Discoloration resistance | Deemed to pass the discoloration test if within no. 3 in the gray discoloration scale. Also, the surface should not crack, bulge or wrinkle. | − | ||
| Shock resistance Note(6) | Diameter of the dent should be 25 mm or less and should not be penetrated by cracks. | − | ||
| Incombustibility or exothermicity |
1st grade incombustibility or 1st grade exothermicity |
|||
| Thermal resistancem2・K/W | 0.043or higher | |||
Note(6): Should apply to surface decoration processed models, but should not apply to surface embossing processed models.
●Perforated Gypsum Boards (GB-P) * ※
| Type | Φ6-22 | Φ13.4-24 | Random | |||||||
| Thickness (mm) (Tolerance +0.5〜0) |
9.5 | 12.5 | 9.5 | 12.5 | 9.5 | 12.5 | ||||
| Sound absorbing ability Note(7) | 0.3S、0.3U | 0.3S | 0.3S、0.3U、0.5U | |||||||
| Length (mm) (Tolerance +3〜0) |
910 | 1,820 | 910 | 1,820 | 910 | 910 | 1,820 | 910 | 1820 | |
| Width (mm) (Tolerance 0〜-3) |
455 910 |
910 | 455 910 |
910 | 910 | 455 910 |
910 | 455 910 |
910 | |
| Bending fracture load N（kgf） Note(8) |
110 （11.2）or higher |
130 （13.3）or higher |
40 （4.1）or higher |
55 （5.6）or higher |
ー | |||||
| Moisture percentage (%) | 3.0以下 | |||||||||
Note(7): S: Without lining material U: With lining material
Note (8): Bending fracture load shall be the value when load is applied perpendicular to the direction of the flow during molding.
●Gypsum Board - Humidity Control Type (GB-R-Hc, GB-D-Hc)
| In addition to compliant with the requirements of GB-R and GB-D, models of any type and thickness should satisfy the following moisture control performance requirements. |
| Hygroscopicity (g/m2) | 150 or higher | |
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