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JIS product specification standard[Gypsum boards JIS A 6901:2014]@[Sound absorbing material JIS A6301:2015]

Gypsum Board - Regular Type (GB-R)
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 m2EK/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 m2EK/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 360i36.7jor higher 500(51.0) or higher 650i66.3jor higher
When wet 220i22.4jor higher 300i30.6jor higher 390i39.8jor 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 m2EK/W 0.040 or higher 0.052 or higher 0.063 or higher
Note (1): Bending fracture load shall be the value when load is applied to the direction of the length.

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
Note(2)@Thermal resistance of A-type and mass/specific gravity per unit area shall be the value of the regular Regular Hard Type Gypsum Boards (GB-R-H).

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 180i18.4jor higher
Width direction 125i12.8jor 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 360i36.7jor higher 500(51.0) or higher 650i66.3jor higher
Width direction 140i14.3jor higher 180i18.4jor higher 220i22.4jor 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@m2EK/W 0.043
or higher
0.057
or higher
0.068
or higher
Note(3): Bending fracture load after surface embossing process is set to 75% or more of the value in the table.
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 360i36.7jor higher
Width direction 140i14.3jor 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 resistancem2EK/W 0.043or higher
Note(5): Bending fracture load after surface embossing process is set to 75% or more of the value in the table.
Note(6): Should apply to surface decoration processed models, but should not apply to surface embossing processed models.


Perforated Gypsum Boards (GB-P) *@
Type 6-22 13.4-24 Random
Thickness (mm)
(Tolerance +0.5`0)
9.5 12.5 9.5 12.5 9.5 12.5
Sound absorbing ability Note(7) 0.3SA0.3U 0.3S 0.3SA0.3UA0.5U
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
Nikgfj Note(8)
110
i11.2jor higher
130
i13.3jor higher
40
i4.1jor higher
55
i5.6jor higher
[
Moisture percentage (%) 3.0ȉ
* Perforated gypsum board (GB-P) is made according to the [Perforated Gypsum Board JIS A 6301:2015] standard.
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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