POLYESTER-BASED RESIN SHEET FOR CARD BASE MATERIAL, AND CARD USING THE SAME

• Main Author: TOKUNAGA YASUSHI
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2016
• Subjects: BOOK COVERS; BOOKBINDING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR; FILES; LOOSE LEAVES; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MOVABLE-STRIP WRITING OR READING APPARATUS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR; SPECIAL PRINTED MATTER; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING

PROBLEM TO BE SOLVED: To provide a resin sheet for a card base material, which has excellent adhesivity to an integrated circuit incorporated therein, engravability, bending resistance, and static flexural strength.SOLUTION: Provided is a resin sheet for a card base material containing (a) polyester-based copolymer having the following characteristics (1) to (5): (1) the copolymer comprises 98 to 100 mol% of a structural unit derived from terephthalic acid when a total of structural units derived from a dicarboxylic acid component is set at 100 mol%; (2) the copolymer comprises 60.5 to 72.5 mol% of a structural unit derived from ethylene glycol, 1.5 to 6 mol% of a structural unit derived from diethylene glycol, and 26 to 38 mol% of a structural unit derived from 1,4-cyclohexanedimethanol when a total of structural units derived from a diol component is set at 100 mol%; (3) the structural unit derived from 1,4-cyclohexanedimethanol is constituted from 55 to 85 mol% of a trans isomer and 45 to 15 mol% of a cis isomer, where a total of the trans isomer and the cis isomer is 100 mol%; (4) the copolymer has a ratio (Mw/Mn) of a polystyrene-equivalent mass average molecular weight (Mw) and number average molecular weight (Mn) of 2.9 to 3.8, the molecular weights being obtained from a differential molecular weight distribution curve measured by gel permeation chromatography; and (5) the number average molecular weight (Mn) is 16000 to 24000.SELECTED DRAWING: None 【課題】組み込まれる集積回路との接着性、刻印性、耐折曲性、及び静的曲げ強さに優れたカード基材用樹脂シートを提供すること。【解決手段】下記特性（１）〜（５）を有する（ａ）ポリエステル系共重合体を含むカード基材用樹脂シート。（１）ジカルボン酸成分に由来する構成単位の総和を１００モル％として、テレフタル酸に由来する構成単位９８〜１００モル％を含む。（２）ジオール成分に由来する構成単位の総和を１００モル％として、エチレングリコールに由来する構成単位６０．５〜７２．５モル％、ジエチレングリコールに由来する構成単位１．５〜６モル％、及び１，４−シクロヘキサンジメタノールに由来する構成単位２６〜３８モル％を含む。（３）上記１，４−シクロヘキサンジメタノールに由来する構成単位は、トランス異性体５５〜８５モル％、及びシス異性体４５〜１５モル％から構成され、ここで上記トランス異性体とシス異性体との和は１００モル％である。（４）ゲル浸透クロマトグラフィにより測定した微分分子量分布曲線から求めたポリスチレン換算の質量平均分子量（Ｍｗ）と数平均分子量（Ｍｎ）との比（Ｍｗ／Ｍｎ）が２．９〜３．８である。（５）上記数平均分子量（Ｍｎ）が１６０００〜２４０００である。【選択図】なし