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1. 发明专利

JP2004155995A Polyvinyl alcohol film 有权
公开(公告)号：JP2004155995A
公开(公告)日：2004-06-03
申请号：JP2002325343
申请日：2002-11-08
申请人： Kuraray Co Ltd , 株式会社クラレ
发明人： KATSUNO RYOJI , ISOZAKI TAKANORI , FUJITA SATOSHI
IPC分类号： G02B5/30 , C08J5/18
摘要： PROBLEM TO BE SOLVED: To prepare a polyvinyl alcohol film that has less color shade and is useful as a manufacture raw material of a polarizing film compatible with upsizing of a liquid crystal display.
SOLUTION: This polyvinyl alcohol film is characterized in that the degree of swelling (A) at the center part in the width direction of the film and the degree of swelling (C) at the position of 100 cm from the center part in the width direction has the relationship : 1.08≤C/A≤1.12.
COPYRIGHT: (C)2004,JPO

2. 发明专利

JP2007279751A Polarizing film and method for manufacturing the same 有权
标题翻译：极化膜及其制造方法
公开(公告)号：JP2007279751A
公开(公告)日：2007-10-25
申请号：JP2007108774
申请日：2007-04-18
申请人： Kuraray Co Ltd , 株式会社クラレ
发明人： KATSUNO RYOJI , ISOZAKI TAKANORI , FUJITA SATOSHI
IPC分类号： G02B5/30 , B29C55/04 , B29K29/00 , B29L7/00 , B29L11/00 , C08J5/18 , G02F1/1335
摘要： PROBLEM TO BE SOLVED: To provide a polarizing film which has few color mottles, allows upsizing of a display device with a liquid crystal display installed therein, and is useful as a material for a polarizing plate to be used as a component for the liquid crystal display.
SOLUTION: In the polarizing film composed of a uniaxially stretched polyvinyl alcohol film, degrees of polarization E on a center section in a width direction of the film and F on a position 50 cm separated from the center section in the width direction are related to each other with inequality of 0.999≤F/E≤1.001.
COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：为了提供一种颜色斑点很少的偏振膜，允许用安装有液晶显示器的显示装置进行扩大，并且可用作用作偏振片的材料，以用作组分液晶显示。解决方案：在由单轴拉伸的聚乙烯醇膜构成的偏振膜中，在膜的宽度方向上的中心部分上的偏振度E和在宽度方向上与中心部分分开的50cm的位置处的F是彼此相关，不等式为0.999≤F/E≤1.001。版权所有（C）2008，JPO＆INPIT

3. 发明专利

JP2014016649A Method of manufacturing polarizing film 有权
标题翻译：制造极化膜的方法
公开(公告)号：JP2014016649A
公开(公告)日：2014-01-30
申请号：JP2013209810
申请日：2013-10-07
申请人： Kuraray Co Ltd , 株式会社クラレ
发明人： KATSUNO RYOJI , IKI TAKASHI , KAZAFUJI OSAMU
IPC分类号： G02B5/30 , G02F1/1335
CPC分类号： B29C41/26 , B29C41/46 , B29K2029/04 , B29K2995/0034 , C08J5/18 , C08J2429/04 , G02B5/3033
摘要： PROBLEM TO BE SOLVED: To provide a polarizing film with little unevenness of transmittance between a central portion and end portions and which is manufactured from a PVA-based polymer film from which a polarizing film with little unevenness of transmittance between the central portion and the end portion can be produced.SOLUTION: A method of manufacturing a polarizing film includes dyeing, uniaxially stretching, fixing, and drying a PVA-based polymer film which satisfies 0.5 mm≤W-W≤5 mm, where W(mm) represents an amount of dimensional change in water of a central portion and W(mm) represents an amount of dimensional change in water (an average value) at 0.3 m from both end portions along a straight line in the width direction (a direction perpendicular to the longitudinal direction) of the PVA-based polymer film. (The amount of dimensional change in water refers to longitudinal elongation of a PVA-based polymer film sample, in a section having a pre-immersion longitudinal length of 250 mm, when immersing the same in pure water at 30°C for 5 minutes.)
摘要翻译：要解决的问题：提供一种偏光膜，其在中心部分和端部之间几乎不具有透光率不均匀性，并且由PVA基聚合物膜制成，其中在中心部分和末端之间具有很小的透光率不均匀的偏光膜可以制造部分。解决方案：制造偏光膜的方法包括染色，单轴拉伸，定影和干燥满足0.5mm≤WW≤5mm的PVA类聚合物膜，其中W（mm）表示尺寸的量中心部分的水的变化，W（mm）表示沿宽度方向（垂直于纵向的方向）的直线的两端部的0.3m处的水的尺寸变化量（平均值）为 PVA类聚合物膜。（在30℃浸渍5分钟的纯水中时，水分尺寸变化量是指PVA类聚合物膜样品在浸渍前纵长为250mm的截面中的纵向伸长率。）

4. 发明专利

JP2012215908A Method for manufacturing polarization film 有权
标题翻译：制造极化膜的方法
公开(公告)号：JP2012215908A
公开(公告)日：2012-11-08
申请号：JP2012172018
申请日：2012-08-02
申请人： Kuraray Co Ltd , 株式会社クラレ
发明人： MORI YASUJIRO , KAZAFUJI OSAMU , HIKASA SHINTARO , KATSUNO RYOJI
IPC分类号： G02B5/30 , C08J5/18 , G02F1/1335
CPC分类号： B29C41/26 , B29K2029/04 , B29K2995/0034 , G02B5/3025 , G02B5/3083
摘要： PROBLEM TO BE SOLVED: To provide a method for manufacturing a polarization film, using a PVA based polymer film, which enables the manufacture of a polarization film having high limit stretching ratio and excellent optical performance without fracturing even when uniaxially stretching at a high magnification, as a raw fabric film.SOLUTION: In a method for manufacturing a polarization film, using a PVA based polymer film satisfying the following formulas (I) and (II) or a PVA based polymer film satisfying the following formulas (I)-(III) as a raw fabric film, dyeing, uniaxial stretching, fixing processing and dry processing are performed, with the formula (I): Δn(MD)-0.1×10≤Δn(TD)≤Δn(MD)+0.25×10, (II): Δn(TD)≤2.5×10, and (III): 1.3×10≤Δn(MD)≤2.0×10(where, Δn(MD)is a value obtained by averaging birefringence in a machine flow direction of the PVA based polymer film in a film thickness direction, and Δn(TD)is a value obtained by averaging birefringence in a width direction of the PVA based polymer film in a film thickness direction.)
摘要翻译：解决的问题：为了提供使用PVA系聚合物膜制造偏振膜的方法，即使在单轴拉伸时也能够制造具有高极限拉伸倍率和优异的光学性能而不发生断裂的偏振膜高放大倍率，作为原料面料薄膜。解决方案：在制造偏光膜的方法中，使用满足下列通式（I）和（II）的PVA类聚合物膜或满足下式（I） - （III）的PVA类聚合物膜作为进行原始织物膜，染色，单轴拉伸，定影处理和干燥处理，式（I）：Δn（MD） Ave -0.1×10 - 3 ≤Δn（TD） Ave ≤Δn（MD） Ave + 0.25×10 < - - - - - - - - - - - - - - - - - - - - - - - - （3） / SP>和（III）：1.3×10 - 3 ≤Δn（MD） Ave ≤2.0×10 Ave 是通过对PVA类聚合物膜的机器流动方向的双折射进行平均而得到的值在膜厚方向上，Δn（TD） Ave 是将PVA系聚合物膜的宽度方向的双折射的膜厚d （C）2013，JPO＆INPIT

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