초록 ▼

Oriented or strength-enhanced embossed film is produced by introducing a thermoplastic film having an inert liquid lubricant covering its surfaces into the nip between at least one pair of rotating compression rolls under sufficient pressure to reduce the thickness of the film, and simultaneously em

Oriented or strength-enhanced embossed film is produced by introducing a thermoplastic film having an inert liquid lubricant covering its surfaces into the nip between at least one pair of rotating compression rolls under sufficient pressure to reduce the thickness of the film, and simultaneously embossing at least one of the film surfaces within the nip. While various inert liquids may be used as the lubricant, use of water for this purpose is preferred. The lubricant is believed to provide a hydrodynamic wedge at the film-compression roll interfaces, and for best results it is preferred to spray the lubricant (most preferably, water) into both incoming sides of the nip of the compression rolls.

대표청구항 ▼

A method of producing oriented or strength-enhanced embossed film which comprises: introducing into the nip between at least one pair of rotating compression rolls one or more orientable thermoplastic films having an inert liquid lubricant covering the film surfaces proximate to at least one pair of

A method of producing oriented or strength-enhanced embossed film which comprises: introducing into the nip between at least one pair of rotating compression rolls one or more orientable thermoplastic films having an inert liquid lubricant covering the film surfaces proximate to at least one pair of said compression rolls, the pressure between at least said one pair of compression rolls being sufficient to reduce the thickness of the film(s) and orient the film(s) passing through the nip thereof; and embossing at least one film surface within said nip as the film(s) is oriented.