METHOD OF FILM STRETCHING Russian patent published in 2020 - IPC B29C55/06 B32B37/20 C08J5/18 A61L15/22 

FIELD: manufacturing technology; technological processes.

SUBSTANCE: group of inventions relates to a method of stretching an initial film from a thermoplastic polymer material, to a film obtained using said method, to a method of making a laminated material, to a laminated material and use thereof. Method for stretching initial film comprises at least one low-melting polymer component and at least one high-melting polymer component. This method includes the following stages: heating of initial film to at least partially melted state, at which at least one low-melting polymer component is in melted liquid state, and at least one high-melting polymer component is not in molten liquid state. Melt is performed by means of at least one heating cylinder, and cooling of partially melted film is performed by means of cooled cylinder clamp. Film is stretched between at least one heating cylinder and cooled cylinder clamp. Produced films can be laminated together with nonwoven material. Laminated material is used in medicine and hygiene.

EFFECT: technical result achieved when using method and laminated material according to inventions, consists in production of thinner films.

25 cl, 1 dwg, 3 tbl, 1 ex