POLYIMIDE FILM, METHOD FOR PRODUCING POLYIMIDE FILM, LAMINATE, DISPLAY SURFACE MATERIAL, TOUCH PANEL MEMBER, LIQUID CRYSTAL DISPLAY DEVICE, AND ORGANIC ELECTROLUMINESCENT DISPLAY

• Main Authors: YOSHINO REIJIRO, OTA TAKAYUKI, KOBAYASHI YOSHIHIRO, SAKAYORI KATSUYA, WAKITA KEISUKE, OKADA KODAI, KANAZAWA NAHOMI, KATSUMATA AYA, MAEDA TAKANORI
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2019
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; FREQUENCY-CHANGING; LAYERED PRODUCTS; LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM; METALLURGY; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; PHYSICS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS

To provide a resin film that has excellent weather resistance, and prevents deterioration of bending resistance.SOLUTION: A polyimide film contains polyimide and an ultraviolet absorber. The ultraviolet absorber is not present on one side of the polyimide film and is unevenly distributed on the other side. The polyimide film has a transmittance of 18% or less at a wavelength of 380 nm and a transmittance of 85% or more at a wavelength of 450 nm.SELECTED DRAWING: Figure 1 【課題】耐候性に優れ、屈曲耐性の低下を抑制した樹脂フィルムを提供する。【解決手段】ポリイミドと紫外線吸収剤とを含有し、前記紫外線吸収剤が、一方の面には存在せず、もう一方の面側に偏在しており、波長３８０ｎｍにおける透過率が１８％以下、且つ波長４５０ｎｍにおける透過率が８５％以上である、ポリイミドフィルム。【選択図】図１