JPS6451358A - Production of anhydrous gypsum board by paper making process - Google Patents

Production of anhydrous gypsum board by paper making process

Info

Publication number
JPS6451358A
JPS6451358A JP20418187A JP20418187A JPS6451358A JP S6451358 A JPS6451358 A JP S6451358A JP 20418187 A JP20418187 A JP 20418187A JP 20418187 A JP20418187 A JP 20418187A JP S6451358 A JPS6451358 A JP S6451358A
Authority
JP
Japan
Prior art keywords
gypsum
molded
anhydrous gypsum
hardening
gypsum board
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
JP20418187A
Other languages
Japanese (ja)
Other versions
JPH085704B2 (en
Inventor
Hidemitsu Nagaoka
Toshio Hasegawa
Noburu Yoshida
Mamoru Ogawara
Yoshinori Hado
Koichi Ito
Hirobumi Ueda
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 JP20418187A priority Critical patent/JPH085704B2/en
Publication of JPS6451358A publication Critical patent/JPS6451358A/en
Publication of JPH085704B2 publication Critical patent/JPH085704B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Landscapes

  • Producing Shaped Articles From Materials (AREA)
  • Curing Cements, Concrete, And Artificial Stone (AREA)

Abstract

PURPOSE:To produce a anhydrous gypsum board of improved quality and productivity by molding the slurry containing an anhydrous gypsum II, short fiber, and gypsum-hardening accelerator consisting of alkali metal sulfates and Al sulfate, as the main constituents, and then hydration-hardening the molded gypsum to markedly improve the hydration modulus of the gypsum. CONSTITUTION:The raw material containing 98-60wt.% anhydrous gypsum II, 2-40wt.% short fiber, and gypsum-hardening accelerator as the main constituents is prepd. Then, the slurry is obtained by incorporating 3-15 times in quantity of water with said raw material and stirring with a pulper. The mixed slurry is homogenized in a chest and is molded in sheet form by using a cylinder machine or Fortlinear machine. An edge part of this molded sheet is cut, pressure-molded according to the need, and hardened thereafter by the dehydration through a given curing. The sheet after the hardening is dried according to the need, cut by a basic size, and thus the target filtration-molded anhydrous gypsum board is produced.
JP20418187A 1987-08-19 1987-08-19 Method for producing anhydrous gypsum papermaking board Expired - Lifetime JPH085704B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20418187A JPH085704B2 (en) 1987-08-19 1987-08-19 Method for producing anhydrous gypsum papermaking board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20418187A JPH085704B2 (en) 1987-08-19 1987-08-19 Method for producing anhydrous gypsum papermaking board

Publications (2)

Publication Number Publication Date
JPS6451358A true JPS6451358A (en) 1989-02-27
JPH085704B2 JPH085704B2 (en) 1996-01-24

Family

ID=16486179

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20418187A Expired - Lifetime JPH085704B2 (en) 1987-08-19 1987-08-19 Method for producing anhydrous gypsum papermaking board

Country Status (1)

Country Link
JP (1) JPH085704B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001139358A (en) * 1999-09-10 2001-05-22 Dow Corning Corp Water-repellent composition and production process of water-repellent base material
CN108085740A (en) * 2017-12-30 2018-05-29 应城市嘉鸿技术服务科技有限公司 A kind of preparation method of anhydrous calcium sulfate whisker
CN112008835A (en) * 2020-09-24 2020-12-01 杭州亦和水电安装工程有限公司 Thistle board extrusion equipment

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001139358A (en) * 1999-09-10 2001-05-22 Dow Corning Corp Water-repellent composition and production process of water-repellent base material
CN108085740A (en) * 2017-12-30 2018-05-29 应城市嘉鸿技术服务科技有限公司 A kind of preparation method of anhydrous calcium sulfate whisker
CN112008835A (en) * 2020-09-24 2020-12-01 杭州亦和水电安装工程有限公司 Thistle board extrusion equipment

Also Published As

Publication number Publication date
JPH085704B2 (en) 1996-01-24

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