JPS6424061A - Production of anhydrous gypsum board - Google Patents

Production of anhydrous gypsum board

Info

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
Application number
JP17875487A
Other languages
Japanese (ja)
Other versions
JPH0829970B2 (en
Inventor
Hidemitsu Nagaoka
Toshio Hasegawa
Noburu Yoshida
Mamoru Ogawara
Yoshinori Hado
Taiji Asada
Tsutomu Shinozaki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Asano Slate Co Ltd
Original Assignee
Asano Slate Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Asano Slate Co Ltd filed Critical Asano Slate Co Ltd
Priority to JP17875487A priority Critical patent/JPH0829970B2/en
Publication of JPS6424061A publication Critical patent/JPS6424061A/en
Publication of JPH0829970B2 publication Critical patent/JPH0829970B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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.
JP17875487A 1987-07-17 1987-07-17 Method for producing anhydrous gypsum papermaking board Expired - Fee Related JPH0829970B2 (en)

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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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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