JPWO2017104473A1 - 石膏板及び石膏板の製造方法 - Google Patents
石膏板及び石膏板の製造方法 Download PDFInfo
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- JPWO2017104473A1 JPWO2017104473A1 JP2017555989A JP2017555989A JPWO2017104473A1 JP WO2017104473 A1 JPWO2017104473 A1 JP WO2017104473A1 JP 2017555989 A JP2017555989 A JP 2017555989A JP 2017555989 A JP2017555989 A JP 2017555989A JP WO2017104473 A1 JPWO2017104473 A1 JP WO2017104473A1
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- Prior art keywords
- gypsum
- termite
- slurry
- board
- agent
- 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.)
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Images
Classifications
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- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- E04C2/04—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of concrete or other stone-like material; of asbestos cement; of cement and other mineral fibres
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Abstract
前記石膏芯を厚さ方向に沿って、一方の表面側から他方の表面側に向かって、厚さの等しい第1の端部領域、中央領域、及び第2の端部領域の3つの領域とした場合に、
前記第1の端部領域、前記中央領域、及び前記第2の端部領域のいずれも前記防蟻剤を含有し、
前記中央領域の前記防蟻剤の含有量が、前記第1の端部領域及び前記第2の端部領域の前記防蟻剤の含有量よりも少ない石膏板を提供する。
Description
前記石膏芯を厚さ方向に沿って、一方の表面側から他方の表面側に向かって、厚さの等しい第1の端部領域、中央領域、及び第2の端部領域の3つの領域とした場合に、
前記第1の端部領域、前記中央領域、及び前記第2の端部領域のいずれも前記防蟻剤を含有し、
前記中央領域の前記防蟻剤の含有量が、前記第1の端部領域及び前記第2の端部領域の前記防蟻剤の含有量よりも少ない石膏板を提供する。
[石膏板]
本実施形態の石膏板の一構成例について説明する。
そして、石膏芯を厚さ方向に沿って、一方の表面側から他方の表面側に向かって、厚さの等しい第1の端部領域、中央領域、及び第2の端部領域の3つの領域とした場合に、第1の端部領域、中央領域、及び第2の端部領域のいずれも防蟻剤を含有することができる。さらに、中央領域の防蟻剤の含有量が、第1の端部領域及び第2の端部領域の防蟻剤の含有量よりも少なくすることができる。
[石膏板の製造方法]
次に、本実施形態の石膏板の製造方法の構成例について説明する。なお、本実施形態の石膏板の製造方法により、既述の本実施形態の石膏板を好適に製造できる。このため、重複する説明については一部記載を省略する。
(第1の構成例)
本実施形態の石膏板の製造方法の第1の構成例について説明する。
石膏スラリーを成形する成形工程。
成形工程で得られた成形体を硬化させる硬化工程。
第1の端部領域、中央領域、及び第2の端部領域のいずれも防蟻剤を含有できる。そして、中央領域の防蟻剤の含有量を、第1の端部領域及び第2の端部領域の防蟻剤の含有量よりも少なくできる。
(第2の構成例)
次に、本実施形態の石膏板の製造方法の第2の構成例について説明する。
石膏スラリーを成形する成形工程。
成形工程で得られた成形体を硬化させる硬化工程。
そして、混練工程では、第1の石膏スラリーと、第1の石膏スラリーよりも泡の含有量が多い第2の石膏スラリーとの2種類の石膏スラリーとを調製できる。
第1の端部領域、中央領域、及び第2の端部領域のいずれも防蟻剤を含有できる。そして、中央領域の防蟻剤の含有量を、第1の端部領域及び第2の端部領域の防蟻剤の含有量よりも少なくできる。
(第3の構成例)
次に、本実施形態の石膏板の製造方法の第3の構成例について説明する。
石膏スラリーを成形する成形工程。
成形工程で得られた成形体を硬化させる硬化工程。
そして、混練工程では、第1の石膏スラリーと、第1の石膏スラリーよりも防蟻剤の含有量が少ない第2の石膏スラリーとの2種類の石膏スラリーを調製できる。
第1の端部領域、中央領域、及び第2の端部領域のいずれも防蟻剤を含有できる。そして、中央領域の防蟻剤の含有量を、第1の端部領域及び第2の端部領域の防蟻剤の含有量よりも少なくできる。
[実施例1]
図2に示した装置を用いて石膏ボードを製造し、該石膏ボード中に含まれる防蟻剤の含有量について評価を行った。
[比較例1]
防蟻剤を添加しない点以外については実施例1と同様にして石膏ボードを製造した。石膏ボードを製造した後、200mm×200mmのサイズにカットした石膏ボードの一方の表面カバー原紙及び他方のカバー原紙にそれぞれ防蟻剤(実施例1に同じ)0.33gを水中に分散させた分散液を塗布した。
[実施例2]
平均粒径が50μmの焼石膏100質量部に対して、防蟻剤(実施例1に同じ)0.0024質量部、凝結調整剤1質量部、減水剤0.3質量部、水80質量部の組成になるよう、市販のブレンダー(SANYO製 型番:SM−R50)を用いて混練し、石膏スラリー(石膏泥漿)を調製した。そして、該石膏スラリーを硬化させた石膏硬化体の比重が0.65となるように、泡を添加して石膏スラリーを調製した(混練工程)。
11 一方の表面
12 他方の表面
141 第1の端部領域
142 中央領域
143 第2の端部領域
Claims (5)
- 難水溶性の防蟻剤を石膏芯に含有する石膏板であって、
前記石膏芯を厚さ方向に沿って、一方の表面側から他方の表面側に向かって、厚さの等しい第1の端部領域、中央領域、及び第2の端部領域の3つの領域とした場合に、
前記第1の端部領域、前記中央領域、及び前記第2の端部領域のいずれも前記防蟻剤を含有し、
前記中央領域の前記防蟻剤の含有量が、前記第1の端部領域及び前記第2の端部領域の前記防蟻剤の含有量よりも少ない石膏板。 - 前記石膏芯1cm3当たりの防蟻剤含有量が0.1μg以上330μg以下である請求項1に記載の石膏板。
- 前記石膏芯1cm3当たりの防蟻剤含有量が0.1μg以上180μg以下である請求項1に記載の石膏板。
- 難水溶性の防蟻剤を石膏芯に含有する石膏板の製造方法であって、
少なくとも焼石膏、水、及び防蟻剤を含有する原料を混練し、石膏スラリーを形成する混練工程と、
前記石膏スラリーを成形する成形工程と、
前記成形工程で得られた成形体を硬化させる硬化工程と、を有し、
前記焼石膏の平均粒径が100μm以下、前記防蟻剤の平均粒径が50μm以下である石膏板の製造方法。 - 前記原料中の前記焼石膏の含有量と、前記防蟻剤の含有量との合計のうち、前記防蟻剤の含有割合は3.0×10−5質量%以上1.5×10−2質量%以下である請求項4に記載の石膏板の製造方法。
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