Provided are a polarizer protective film containing a (meth)acrylic resin as a main component and being excellent in adhesion with a polarizer, a polarizing plate including the polarizer protective film and a polarizer which are unlikely to peel off from each other, and an image display apparatus of high quality using the polarizing plate. The polarizer protective film of the present invention includes a coating layer containing a (meth)acrylic resin (B) as a main component on at least one surface of a film containing a (meth)acrylic resin (A) as a main component.

Polarizer protective film, polarizing plate, and image display apparatus

The invention is a film of a vinyl alcohol polymer that contains from 0.01 to 20 mol % of cationic group-containing units and contains from 0.5 to 24 mol % of α-olefin units having at most 4 carbon atoms. The polyvinyl alcohol film gives polarizing films and polarizer which are resistant to water and have good polarizing properties and which are free from a problem of irregular coloration.

Polyvinyl alcohol film and polarizing film

A water-soluble resin composition is provided which comprises (i) 100 parts by weight of a polyvinyl alcohol polymer having a 1,2-glycol linkage content of at least 1.8 mole percent and a degree of hydrolysis of at least 90 mole percent, (ii) 1 to 50 parts by weight of a plasticizer and (iii) 5 to 50 parts by weight of a monosaccharide and/or a polysaccharide, optionally together with (iv) 1 to 20 parts by weight of an inorganic filler. Also provided is a water-soluble resin composition which comprise (i′) 100 parts by weight of a polyvinyl alcohol polymer having a 1,2-glycol linkage content of at least 1.8 mole percent and a degree of hydrolysis of 92 to 99 mole percent, (ii′) 1 to 50 parts by weight of a plasticizer and (iv′) 1 to 20 parts by weight of an inorganic filler, optionally together with (iii′) 5 to 50 parts by weight of a monosaccharide and/or polysaccharide. Further provided are water-soluble films produced by using those water-soluble resin compositions.

Water-soluble resin composition and water-soluble film

A quantum rod light-emitting display device according to an embodiment of the invention includes a display panel including a first substrate, a second substrate opposite to the first substrate, and a quantum rod layer formed between the first substrate and the second substrate, wherein a plurality of quantum rods are arranged in the quantum rod layer in one direction; and a polarizer disposed on the display panel and including a quarter wave plate (QWP) layer and a polyvinyl alcohol (PVA) layer, wherein the PVA layer transmits only light linearly polarized in a first direction, and wherein the QWP layer is disposed under the PVA layer, and the QWP layer circularly polarizes the light linearly polarized in the first direction or linearly polarizes light reflected by the display panel in a second direction.

Quantum rod light-emitting display device

PROBLEM TO BE SOLVED: To provide a polyvinyl alcohol film having excellent flatness, a good appearance of a film roll and an excellent long package of a film and affording a polarizing film without optical unevenness and to provide a method for producing the film. SOLUTION: The polyvinyl alcohol film has ≤1 cm height (h) from the bottommost part to the topmost part of the surface waviness when the polyvinyl alcohol film having 1 m×1 m size is placed on a flat platen. The polyvinyl alcohol film is produced by the following steps of (A) a step of forming the polyvinyl alcohol film by a casting method, (B) a step of heating the formed polyvinyl alcohol film and regulating the moisture content to 1-5 wt.%, (C) a step of slitting the heated polyvinyl alcohol film, then regulating the moisture content in the film to 1-5 wt.% and winding the film in the regulated state and (D) a step of packaging the wound polyvinyl alcohol film. COPYRIGHT: (C)2006,JPO&NCIPI

Polyvinyl alcohol film and method for producing the same

The invention is a polyvinyl alcohol film having an YI value of at most 20, which is formed of a modified polyvinyl alcohol having a degree of polymerization of from 1500 to 5000, an ethylene unit content of from 1 to 4 mol % and a 1,2-glycol bond content of at most 1.4 mol %. The polyvinyl alcohol film gives polarizing films that contain no impurities and have good polarization performance, durability and hue stability.

Polyvinyl alcohol film

PROBLEM TO BE SOLVED: To provide a PVA-based polymer film capable of giving a polarizing film showing wide and high polarization performance.SOLUTION: The PVA-based polymer film of the present invention is a film for producing a polarizing film, where the angle formed by a direction to uniaxially orient and an optical axis in producing a polarizing film is in the range of 0 to 20° and where the retardation is in the range of 50 to 150 nm. A preferable aspect of the PVA-based polymer film of the present invention is a PVA-based polymer film having a swelling degree in the range of 205 to 215%. In addition, another preferable aspect of the PVA-based polymer film of the present invention is a long PVA-based polymer film where the direction to uniaxially orient in producing a polarizing film is a lengthwise direction of the film.

Polyvinyl alcohol-based polymer film

PROBLEM TO BE SOLVED: To provide a polyvinyl alcohol film which can be used for manufacture of a polarizing film having high polarizing performance and a method for manufacturing the same, and to provide a method for manufacturing the polarizing film using the same. SOLUTION: In the polyvinyl alcohol film for the polarizing film, an angle formed by a flowing direction and an optical axis is in the range of 70 to 110° and retardation in the thickness direction of a center part in a width direction is in the range of 15 to 90 nm. COPYRIGHT: (C)2010,JPO&INPIT

Polyvinyl alcohol film for polarizing film, method for manufacturing the same, and method for manufacturing polarizing film using the same

PROBLEM TO BE SOLVED: To provide a polarizing film which exhibits high absorbance and a high degree of polarization for light in a long wavelength region.SOLUTION: A method of manufacturing a polarizing film is provided, where a PVA-based polymer film having a crystal long period of 14.5 to 16.0 nm in water is put through processes of dyeing, uniaxial stretching, dye fixing, and drying. When the PVA-based polymer film is formed using a film forming apparatus having a plurality of drying rolls and heat treatment rolls, the film is dried such that Tin an equation (I) is between 60 and 75. T={T×(40-V)+T×(V-V)}/(40-V) (I), where Trepresents surface temperature (in °C) of a first drying roll and Vrepresents a volatilized portion (in mol%; between 10 and 30) of the film when peeled from the first drying roll, while Trepresents an average value (in °C) of the surface temperatures of second through final drying rolls and Vrepresents a volatilized portion (in mol%) of the film when peeled from the final drying roll.

Toshio Nakai

Papers

Polyvinyl alcohol film

Polyvinyl alcohol-based polymer film

Polyvinyl alcohol film for polarizing film, method for manufacturing the same, and method for manufacturing polarizing film using the same

Method of manufacturing polarizing film