LAMINATE AND METHOD FOR PRODUCING THE SAME

To provide a laminate which has a layer containing a 4-methyl-1-pentene-based polymer and a layer containing the other thermoplastic resin, has good film thickness accuracy (thickness-thinness accuracy) with little variation in film thickness and heat resistance and further to provide a method for p...

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Bibliographische Detailangaben
Hauptverfasser: SASAKI TOYOAKI, TANAKA MASAKAZU
Format: Patent
Sprache:eng ; jpn
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Zusammenfassung:To provide a laminate which has a layer containing a 4-methyl-1-pentene-based polymer and a layer containing the other thermoplastic resin, has good film thickness accuracy (thickness-thinness accuracy) with little variation in film thickness and heat resistance and further to provide a method for producing the laminate by inflation film molding accompanied by stretching which enables laminating inflation molding of the 4-methyl-1-pentene-based polymer and the other thermoplastic resin.SOLUTION: There is provided a laminate which contains an X layer containing a 4-methyl-1-pentene polymer composition (X) satisfying the following requirements (X-1) to (X-4) and a Y layer containing a thermoplastic resin (Y). Requirement (X-1): the density is 0.82 to 0.88 g/m3. Requirement (X-2): the melting point (Tm) is 190 to 220°C. Requirement (X-3): the melting enthalpy ΔH is less than 35 J/g. Requirement (X-4): the semi-crystallization time is 220 seconds or more or is not measured.SELECTED DRAWING: None 【課題】本発明は、4-メチル-1-ペンテン系重合体を含む層と他の熱可塑性樹脂を含む層とを有し、膜厚にばらつきが少なく膜厚精度(厚薄精度)が良好で、耐熱性を有する積層体を提供することを課題としている。また本発明は、4-メチル-1-ペンテン系重合体と他の熱可塑性樹脂との積層インフレーション成形を可能とし、延伸を伴うインフレーションフィルム成形により、前記積層体を製造する方法を提供することを課題としている。【解決手段】要件(X-1)~(X-4)を満たす4-メチル-1-ペンテン系重合体組成物(X)を含むX層と、熱可塑性樹脂(Y)を含むY層とを含む積層体。要件(X-1):密度が0.82~0.88g/m3。要件(X-2):融点(Tm)が、190℃~220℃。要件(X-3):融解エンタルピーΔHが35J/g未満。要件(X-4):半結晶化時間が220秒以上であるか、または計測されない。【選択図】なし