Abstract: Disclosed is a forgery-preventing film having, on one side of a first layer (A) comprising a thermoplastic resin, a second layer (B) comprising a thermoplastic resin wherein said film satisfying at least one of the following conditions: Condition 1: one side of said first layer (A) is treated to prevent forgery and said second layer (B) is formed on the surface of the treated side of said first layer (A); Condition 2: said second layer (B) comprises at least two thermoplastic resins of different melt viscosities; Condition 3: porosity of said second layer (B) is greater than porosity of said first layer (A); and Condition 4: a polymer net is formed on one side of said first layer (A) and said second layer (B) is formed on the surface having the polymer net.

Abstract: Disclosed is a forgery-preventing film having, on one side of a first layer (A) comprising a thermoplastic resin, a second layer (B) comprising a thermoplastic resin wherein said film satisfying at least one of the following conditions: Condition 1: one side of said first layer (A) is treated to prevent forgery and said second layer (B) is formed on the surface of the treated side of said first layer (A); Condition 2: said second layer (B) comprises at least two thermoplastic resins of different melt viscosities; Condition 3: porosity of said second layer (B) is greater than porosity of said first layer (A); and Condition 4: a polymer net is formed on one side of said first layer (A) and said second layer (B) is formed on the surface having the polymer net.

Abstract: Disclosed is a forgery-preventing film having, on one side of a first layer (A) comprising a thermoplastic resin, a second layer (B) comprising a thermoplastic resin wherein said film satisfying at least one of the following conditions: Condition 1: one side of said first layer (A) is treated to prevent forgery and said second layer (B) is formed on the surface of the treated side of said first layer (A); Condition 2: said second layer (B) comprises at least two thermoplastic resins of different melt viscosities; Condition 3: porosity of said second layer (B) is greater than porosity of said first layer (A); and Condition 4: a polymer net is formed on one side of said first layer (A) and said second layer (B) is formed on the surface having the polymer net.

Abstract: A thermosetting powder coating composition has an average particle diameter of entire particles is within a range from 5 to 50 &mgr;m, an average circularity of the particles is 0.90 or more, and a circularity of particles having a maximum number frequency in circularity distribution is within a range from 0.98 to 1.00, prepared by spray-drying an organic solvent solution containing, as a coating film forming component, an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40° C. or higher, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0° C. or lower and a polycarboxylic acid (C) as an essential component.

Abstract: A thermosetting powder coating composition has an average particle diameter of entire particles is within a range from 5 to 50 &mgr;m, an average circularity of the particles is 0.90 or more, and a circularity of particles having a maximum number frequency in circularity distribution is within a range from 0.98 to 1.00, prepared by spray-drying an organic solvent solution containing, as a coating film forming component, an epoxy group-containing vinyl copolymer (A) having a glass transition temperature of 40° C. or higher, an epoxy group-containing vinyl copolymer (B) having a glass transition temperature of 0° C. or lower and a polycarboxylic acid (C) as an essential component.

Abstract: The thickness of a biaxially oriented resin film is controlled by reading the thickness distribution of the oriented resin film prior to rolling up thereof and separating the readings into modes by harmonic analysis (Fourier transformation) using a computer. The modes are then divided into modes of a low frequency component and a high frequency components by a predetermined border mode. The deviation is controlled in the profile of the low frequency component by adjusting die bolts as well as controlling the deviation in the profile of the high frequency component by regulating temperatures of a number of heater elements in an oven.