(과제) 광의 입사 각도나 필름 두께의 근소한 차이에 의한 색상의 변화를 억제하면서도 종래의 폴리머 다층 적층 필름보다 뛰어난 열선 컷팅 성능을 구비한 적층 필름을 제공한다. (해결 수단) 다른 광학적 성질을 갖는 2종 이상의 열가소성 수지가 교대로 각각 50층 이상 적층된 구성을 포함하고, 또한 파장 900∼1200nm에서의 평균 반사율이 70% 이상이고, 또한 투과광의 입사 각도 12°와 입사 각도 45°에서의 a*값의 차 Δa* 및 b*값의 차 Δb*이 10 이하이고, 또한 파장 400∼800nm에 있어서 투과율이 80% 이하가 되는 대역을 50nm 이상 구비해서 이루어지는 것을 특징으로 하는 적층 필름으로 한다.

    [Problem] The present invention provides a multilayer film having superior heat-ray shielding performance as compared to conventional polymer multilayer films, with the changes in the color tone caused by slight differences in the light incident angle and the film thickness being suppressed. [Means for Solution] The multilayer film of the present invention comprising a constitution in which 50 or more layers of each of two or more thermoplastic resins having different optical properties are alternately laminated with each other, wherein the average reflectance in a wavelength range of 900 to 1,200 nm is 70% or higher; both of the differences between the a* values (a*) and between the b* values (b*), respectively, of transmitted light incoming at an angle of 12° and of transmitted light incoming at an angle of 45° are 10 or less; and the multilayer film comprises a bandwidth of not less than 50 nm where the transmittance is 80% or lower in a wavelength range of 400 to 800 nm.


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    Titel :

    LAMINATE FILM AND AUTOMOTIVE WINDOW GLASS USING SAME


    Weitere Titelangaben:

    적층 필름 및 그것을 사용한 자동차용 창유리


    Erscheinungsdatum :

    2019-05-29


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM , Schichtkörper, d.h. aus Ebenen oder gewölbten Schichten, z.B. mit zell- oder wabenförmiger Form, aufgebaute Erzeugnisse / B60J WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES , Fenster, Windschutzscheiben und bewegbare Dächer, Türen oder Ähnliches für Fahrzeuge



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