Abstract: Since an inorganic and/or organic antibacterial agent and a hydrophilic substance are used in combination in this invention to produce an antibacterial composition, the intrinsic antibacterial activity of the inorganic or organic antibacterial agent is markedly increased, so that the antibacterial agent used even in a low concentration shows a high antibacterial activity. High antibacterial moldings can be obtained at a relatively low cost by laminating the antibacterial composition of the invention on an inorganic or organic substrate.

Abstract: A polyester laminated film with excellent sealing ability is provided. The polyester laminated film comprises a base film of a polyester resin and a sealing film of a polyester composition, said sealing film being disposed on at least one side of said base film, wherein the sealing energy, which is measured when two pieces of said laminated films are joined together with the respective sealing films facing each other, is 300 g.cm/15 mm or more.

Abstract: A void-containing composite film including (A) a polyester base layer containing voids composed mainly of a polymer mixture of a polyester and a thermoplastic resin which is not compatible with the polyester and is selected from the group of polystyrene resins, polyolefin resins, polyacrylic resins, polycarbonate resins, polysulfone resins, cellulose resins, polysiloxane resins and silicone resins, and (B) at least one outer surface layer composed mainly of polyethylene terephthalate and formed on at least one side of the polyester base layer (A), the polyester base layer (A) and the at least one outer surface layer (B) being formed into a composite film by co-extrusion, followed by orientation in at least one direction, the void percentage of a surface portion having 3 .mu.

Abstract: A void-containing polyester-type film is obtained by drawing a resin composition sheet consisting of a polyester, and a thermoplastic resin which is not compatible with the polyester in at least one direction. The film of this invention has a film base material consisting mainly of the polyester, fine particles consisting mainly of the thermoplastic resin which are dispersed into the film base material, and fine voids formed around the fine particles. The film of this invention has a surface layer having 3 .mu.m or more thickness, a void percentage of 4% by volume or less in an area having 3 .mu.m thickness from its surface, and an average void percentage of 8% by volume to 50% by volume.The film of this invention has excellent softeness, lightness, and hiding power, and excellent surface strength. The film can be used as a base material for a label, etc.

Abstract: A process for preparing a polyamide type film which comprises melt-extruding a polyamide resin having a metal compound and a melt specific resistance of not more than 1.5.times.10.sup.5 .OMEGA.cm at 260.degree. C. in a form of a film, contacting the melt-extruded film closely with a revolving cooling drum through static electricity and taking up the film while cooling rapidly to solidify, which provides remarkable improved adhesion by static electricity. As a result, increasing the take-up rate of the revolving cooling drum does not cause trapping of air between the drum and the film so that a film having excellent uniformity in thickness and transparency can be produced.