RESIN MOLDED PRODUCT, LUMINAIRE, DISPLAY UNIT AND PRODUCTION METHOD OF RESIN MOLDED PRODUCT

• Main Author: SAKIYAMA TETSUZO
• Format: Patent
• Language: English; Japanese
• Published: 08.06.2015
• Subjects: AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING; BLASTING; 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; HEATING; LIGHTING; MECHANICAL ENGINEERING; NON-LINEAR OPTICS; NON-PORTABLE LIGHTING DEVICES; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; PERFORMING OPERATIONS; PHYSICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR; SHAPING OR JOINING OF PLASTICS; SYSTEMS THEREOF; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF; TRANSPORTING; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

PROBLEM TO BE SOLVED: To provide a resin molded product molded with an acrylic resin, capable of suppressing waviness after a long term storage.SOLUTION: A resin molded product 12 comprises an acrylic resin molded by an extrusion molding method or an injection molding method, and has a first external surface 12b and a second external surface 12a different from the first external surface 12b. In the first external surface 12b, the speed of water absorption is lower than the speed of water absorption in the second external surface 12a. The coefficient of water absorption is 6000-8000 ppm at the central part R1 of the first external surface 12b immediately after molded by the extrusion molding method or the injection molding method. 【課題】アクリル樹脂で成形されたものであって、長期間保管してもうねりが生じるのを抑えた樹脂成形物を提供する。【解決手段】アクリル樹脂で押出し成形法又は射出成形法で成形され、第一の外面１２ｂ及び第一の外面１２ｂとは異なる第二の外面１２ａを有する樹脂成形物１２であって、第一の外面１２ｂの吸水速度は第二の外面１２ａの吸水速度よりも小さく、押出し成形法又は射出成形法で成形された製造直後の、第一の外面１２ｂの中央部Ｒ１における吸水率は、６０００ｐｐｍ以上８０００ｐｐｍ以下である。【選択図】図３