JPS6424061A - Production of anhydrous gypsum board - Google Patents
Production of anhydrous gypsum boardInfo
- Publication number
- JPS6424061A JPS6424061A JP17875487A JP17875487A JPS6424061A JP S6424061 A JPS6424061 A JP S6424061A JP 17875487 A JP17875487 A JP 17875487A JP 17875487 A JP17875487 A JP 17875487A JP S6424061 A JPS6424061 A JP S6424061A
- Authority
- JP
- Japan
- Prior art keywords
- gypsum
- board
- anhydrous gypsum
- gypsum board
- efflorescence
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Producing Shaped Articles From Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Paper (AREA)
Abstract
PURPOSE:To obtain prescribed strength in an early time without increasing a length change rate of a gypsum board and without generating efflorescence by preparing a slurry essentially consisting of specific ratios of the anhydrous gypsum II, short fibers, water retentive material and hardener to a board. CONSTITUTION:The slurry essentially consisting, by weight %, 40-96% the anhydrous gypsum II, 2-30% short fibers 2-30% water retentive material and 0.1-2.5%, by the weight of the anhydrous gypsum II, gypsum curing accelerator is molded to the board and is cured to obtain the gypsum board. The strength is developed in the early time by this method and the increase in the change rate of the length of the product and the generation of the efflorescence are suppressed by the above-mentioned limitation of the amt. of the hardening accelerator to be added according to this method. Further, the filterability and moldability are upgraded and the surface smoothness of the product is improved.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17875487A JPH0829970B2 (en) | 1987-07-17 | 1987-07-17 | Method for producing anhydrous gypsum papermaking board |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17875487A JPH0829970B2 (en) | 1987-07-17 | 1987-07-17 | Method for producing anhydrous gypsum papermaking board |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS6424061A true JPS6424061A (en) | 1989-01-26 |
JPH0829970B2 JPH0829970B2 (en) | 1996-03-27 |
Family
ID=16054011
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17875487A Expired - Fee Related JPH0829970B2 (en) | 1987-07-17 | 1987-07-17 | Method for producing anhydrous gypsum papermaking board |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0829970B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004010402A (en) * | 2002-06-05 | 2004-01-15 | A & A Material Corp | Fiber-containing gypsum board and its manufacturing process |
-
1987
- 1987-07-17 JP JP17875487A patent/JPH0829970B2/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004010402A (en) * | 2002-06-05 | 2004-01-15 | A & A Material Corp | Fiber-containing gypsum board and its manufacturing process |
Also Published As
Publication number | Publication date |
---|---|
JPH0829970B2 (en) | 1996-03-27 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
LAPS | Cancellation because of no payment of annual fees |