PLASTIC HOOK MOLDED BODY

• Main Author: NAKAJIMA MASA
• Format: Patent
• Language: English; Japanese
• Published: 02.02.2017
• Subjects: BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; HABERDASHERY; HUMAN NECESSITIES; JEWELLERY; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

PROBLEM TO BE SOLVED: To make a plastic hook molded body excellent in physical properties and appearance when absorbing water.SOLUTION: There is provided a plastic hook molded body formed by molding a polyamide resin composition containing (A) a polyamide resin and (B) an inorganic filler, where (A) is a copolymer polyamide and/or a polyamide mixture that contain a structural unit of polyamide containing a dicarboxylic acid having a cyclic structure and/or diamine having a cyclic structure and satisfy (a) to (d), and satisfies (e). (a) A ratio of carbon number/nitrogen number exceeds 7.0; (b) Tg of viscoelastic measurement in drying is 50°C or higher; (c) crystallization enthalpy ΔHc obtained when cooling the polyamide resin composition at 20°C/min by differential scanning calorimetry is 10 J/g or more; (d) a difference between melting point peak temperature Tm and crystallization peak temperature Tc obtained when heating and cooling the polyamide resin composition at 20°C/min by differential scanning calorimetry is 42°C or higher; and (e) a ratio of weight average molecular weight Mw to number average molecular weight Mn is 2.8 or less.SELECTED DRAWING: None 【課題】プラスチックホック成形体を吸水時における物性、外観性を優れたものとする。【解決手段】（Ａ）ポリアミド樹脂と（Ｂ）無機充填材を含むポリアミド樹脂組成物であって、（Ａ）が環状構造を有するジカルボン酸及び／又は環状構造を有するジアミンを含むポリアミドの構成単位を含み（ａ）〜（ｄ）を満たす共重合ポリアミド及び／又はポリアミド混合物であり、（ｅ）を満たすポリアミド樹脂組成物を成形してなるプラスチックホック成形体。（ａ）炭素数／窒素数の比が７．０を超える（ｂ）乾燥時、粘弾性測定のＴｇが５０℃以上（ｃ）示差走査熱量測定により２０℃／ｍｉｎで冷却したときに得られる結晶化エンタルピーΔＨｃが１０Ｊ／ｇ以上（ｄ）示差走査熱量測定により２０℃／ｍｉｎで加熱冷却したときに得られる融点ピーク温度Ｔｍと結晶化ピーク温度Ｔｃとの差が４２℃以上（ｅ）重量平均分子量Ｍｗと数平均分子量Ｍｎの比が２．８以下【選択図】なし