FIELD: technological processes.
SUBSTANCE: present invention relates to a method for perforating a plastic film, in which the main film is perforated during its sliding through the perforating device due to the action of a plurality of jets of compressed hot gas having a temperature higher than the melting point of the main film, in which the hot gas jets are matched with the main film sliding speed, in which reinforcing tapes obtained from the auxiliary plastic film are connected to the perforated main film, providing adhesion of reinforcing tapes between parallel rows of base holes; then perforated main film with reinforcing tapes are stretched in longitudinal sliding direction. During perforation, the main plastic film is pressed against the perforating pattern, as a result, the main plastic film immediately penetrates into holes of the pattern for perforation under action of said hot gas jets. Present invention also relates to a device for perforating with hot gas jets and an apparatus for perforating and stretching a film of plastic according to said method.
EFFECT: method and apparatus for perforating a plastic film are disclosed.
23 cl, 20 dwg
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