Abstract: The present invention provides a polyvinyl alcohol film having a correlation length of 200 nm or less, the correlation length being derived from the result of light scattering measurement using a He—Ne laser having a wavelength of 633 nm as a light source.

Abstract: A clearance between a metal electrode and a sidewall portion (sidewall) of an approximately U-shaped dielectric is adjusted by, for example, partially inserting a heat insulator, a heat shield or an insulating material. Temperature difference in the Z direction (vertical direction) of the sidewall portion of approximately U-shaped dielectric is made smaller than temperature difference between front and rear sides at the bottom (bottom portion) of approximately U-shaped dielectric, to reduce warp in the Z direction of the sidewall portion of approximately U-shaped dielectric. This curbs warp in the Z direction of the bottom portion of approximately U-shaped dielectric coupled to the sidewall portion. The warp in the Z direction, which would be generated if the temperature difference only between the front and rear surfaces at the bottom were considered, can be curbed by utilizing the sidewall portion of approximately U-shaped dielectric.

Abstract: A plasma processing apparatus according to the present invention includes at least a pair of elongated electrode units which are faced to each other, each electrode unit including an elongated conductive member extending in a longitudinal direction, an elongated dielectric member which is provided on the conductive member in the longitudinal direction, and a fastening member for fastening the conductive member and the dielectric member to each other, wherein the fastening member fastens the conductive member and the dielectric member to each other such that they can displace with respect to each other in the event of the occurrence of thermal expansions of the conductive member and the dielectric member.

Abstract: The present invention provides a polyvinyl alcohol film having a correlation length of 200 nm or less, the correlation length being derived from the result of light scattering measurement using a He—Ne laser having a wavelength of 633 nm as a light source.

Abstract: A water-soluble film made from a resin composition comprising (A) 100 parts by weight of an anionic group-modified polyvinyl alcohol having a viscosity of 10 to 35 mPa·s measured at 20° C. with respect to a 4% by weight aqueous solution thereof, an average degree of hydrolysis of 80.0 to 99.9% by mole and a rate of anionic group modification of 1 to 10% by mole, (B) 20 to 50 parts by weight of a plasticizer, (C) 2 to 30 parts by weight of a filler, and (D) 0.01 to 2.5 parts by weight of a surfactant. The water-soluble film has an excellent water solubility, and is not gelled or insolubilized even if chemicals containing a boric acid substance, particularly sodium perborate, are packaged therein or even if it is put in an aqueous solution of a boric acid substance, particularly sodium perborate.

Abstract: A method for producing an embossed PVA film, which includes embossing the film such that the crystallinity index of the emboss top is 0.50-0.90. The invention provides an embossed PVA film superior in resistance to blocking even when in a rolled state, in appearance to show the high quality of products, and in resistance to pinholes.

Abstract: A water-soluble film made from a resin composition comprising (A) 100 parts by weight of an anionic group-modified polyvinyl alcohol having a viscosity of 10 to 35 mPa·s measured at 20° C. with respect to a 4% by weight aqueous solution thereof, an average degree of hydrolysis of 80.0 to 99.9% by mole and a rate of anionic group modification of 1 to 10% by mole, (B) 20 to 50 parts by weight of a plasticizer, (C) 2 to 30 parts by weight of a filler, and (D) 0.01 to 2.5 parts by weight of a surfactant. The water-soluble film has an excellent water solubility, and is not gelled or insolubilized even if chemicals containing a boric acid substance, particularly sodium perborate, are packaged therein or even if it is put in an aqueous solution of a boric acid substance, particularly sodium perborate.

Abstract: The present invention provides a method for producing an embossed PVA film, which includes embossing the film such that the crystallinity index of the emboss top is 0.50-0.90. According to the present invention, an embossed PVA film superior in resistance to blocking even when preserved in a roll state, in appearance to show high quality of products, and in resistance to pinholes can be provided.