JP4990170B2 - モールド材およびモールド成形体 - Google Patents
モールド材およびモールド成形体 Download PDFInfo
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- JP4990170B2 JP4990170B2 JP2008007479A JP2008007479A JP4990170B2 JP 4990170 B2 JP4990170 B2 JP 4990170B2 JP 2008007479 A JP2008007479 A JP 2008007479A JP 2008007479 A JP2008007479 A JP 2008007479A JP 4990170 B2 JP4990170 B2 JP 4990170B2
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- Prior art keywords
- resin
- molding material
- mold
- molded body
- molding
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Images
Landscapes
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Description
本発明のモールド成形体は、上記のモールド材を用いて成形されたことを特徴とする。
本発明において、木質系材料由来のリグニン系化合物とは、木質系材料からリグニンを基に生成した化合物を言い、アルカリなどにより分解可能である。かかるリグニン系化合物にはたとえば、木質系材料からフェノール系溶剤と酸とを用いて分離したリグノフェノールあるいはその誘導体がある。
本発明に用いるリグニン系化合物の原料である木質系材料は、主にセルロース、ヘミセルロース、リグニンから構成されている。木質中でセルロースが整然と並び、その間にヘミセルロースとリグニンが充填されていて、木質の強度が保たれている。セルロースおよびヘミセルロースはグルコースを構成単位とする多糖類であり、リグニンは以下の式で表される構造を基本とする無定形高分子物質である。
不飽和ポリエステル樹脂を使用する場合は一般に低収縮剤が添加される。低収縮剤としては、熱可塑性樹脂や熱可塑性ゴムなどが用いられる。熱可塑性樹脂には例えば、ポリスチレン、ポリ酢酸ビニル、ポリメチルメタクリレート、ポリエチレン、ポリ−ε−カプロラクタム、飽和ポリエステル、ポリ塩化ビニル、ポリブタジエン、スチレン−アクリル酸共重合体、スチレン−酢酸ビニル共重合体、アクリロニトリル−スチレン共重合体等がある。熱可塑性ゴムには、スチレンブタジエンゴム、ニトリルゴムなどがある。
(実施例1〜4)
木質系材料としてパーム椰子の廃幹を200×300×50mmの板状に切り出し、カッターミル(槇野産業製,VM−22,φ10mmのスクリーン付き)で数mm程度に粗粉砕し、さらに微粉砕機(槇野産業製,DD−2−3.7,φ0.35mmのスクリーン付き)で平均粒径100μm程度に粉砕し、106μmの篩目を有する篩で分級した。
フェノール樹脂(大日本インキ化学工業製フェノライトP5510)と実施例1で作成したリグノフェノール誘導体とを8:2の重量比で混合して、粉末状のモールド材(実施例5のモールド材と呼ぶ)を作成し、このモールド材を、長さ100mm、幅10mmの板状物を成形できる金型に充填し、金型温度150℃、圧縮圧力50MPaで10分間加圧成形して、厚み3mmの成形体試験片を作成した。
木質系材料として杉木材を用い、粉砕機で数mm程度に粗粉砕した粉砕物をアセトンで脱脂したこと以外は、実施例1と同様にして、リグノフェノール誘導体を作成した。そして、不飽和ポリエステル樹脂(大日本インキ化学工業製PB210)と杉木材由来のリグノフェノール誘導体とスチレンモノマーとの6:3:1の混合物を得たこと以外は、実施例1と同様にして、ペースト状のモールド材(実施例6のモールド材と呼ぶ)を作成した。
木質系材料としてパーム椰子の廃幹を用い、p−クレゾールに代えてヒドロキノンを用いたこと以外は、実施例1と同様にして、リグノフェノールを作成した。そして、不飽和ポリエステル樹脂(大日本インキ化学工業製PB210)とパーム椰子由来のリグノフェノールとポリカプロラクトンとの混合物(2:1)とスチレンモノマーとの6:3:1混合物を得たこと以外は、実施例1と同様にして、ペースト状のモールド材(実施例7のモールド材と呼ぶ)を作成した。
2 ブラケット
3 回転子
4 フランジ部
5 取付孔
6 固定子鉄芯
7 固定子巻線
8 モールド材
9 シャフト
10 ベアリング
Claims (6)
- 熱硬化性樹脂と木質系材料由来のリグニン系化合物とを少なくとも含んだモールド材。
- 熱硬化性樹脂がフェノール樹脂または不飽和ポリエステル樹脂である請求項1記載のモールド材。
- リグニン系化合物が、木質系材料からフェノール系溶剤と酸とを用いて分離したリグノフェノールあるいはその誘導体である請求項1記載のモールド材。
- 木質系材料が、間伐材、剪定枝、樹皮、建築廃材、パーム椰子の椰子殻あるいは廃葉あるいは廃幹から選ばれる少なくとも1種の廃材である請求項1記載のモールド材。
- 請求項1記載のモールド材を用いて成形されたモールド成形体。
- モールドモータあるいはモールドトランスである請求項5記載のモールド成形体。
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