Hot air punching film and forming method thereof

Abstract

The invention relates to a hot air punching film and a forming method thereof, wherein high-temperature hot air is combined with a punching hole forming die roller to forcedly form a hot air punching film with naturally shrinkable convex edge on a polymer plastic film surface. The plastic film surface is provided with a plurality of through holes, and the edges of the through holes in the plastic film surface are naturally shrinkable convex edges. The hot air punching film has the advantages that: firstly, the hot air punching film formed by high-temperature air flow radically solves the problems that the edge of a hole punched by flames is burned, the flexibility of the plastic film is damaged by the burned hole edge, and secondary injury to skin, particularly to skin wound is caused, thereby ensuring the flexibility of the punched hole edge; secondly, due to adoption of the hot air punching, pollution of harmful gases to the punched plastic film surface and to atmosphere environment is completely avoided, so that the safety of the punched plastic film is guaranteed fundamentally; and thirdly, the hot air punching is adopted to ensure the flexibility and the smoothness of the plastic convex edge.

Description

technical field [0001] The invention relates to a hot-air perforated film with natural shrinkage convex edges formed on the surface of a polymer plastic film by combining high-temperature hot air with a perforated hole forming mold roll and a forming method, belonging to the field of perforated film manufacturing. Background technique [0002] CN10131581B, title "Aperture mask for flame perforation", the present invention provides a method of manufacturing such an aperture mask, comprising the following steps: providing a support surface, wherein the support surface includes a plurality of lowered parts; providing a flame injector, wherein the flame burner supports a flame, and wherein the flame includes a flame tongue opposite the flame burner; at least a portion of an elongated flexible plastic film web is brought into abutment contact with the support surface; The flame of the burner heats the plastic film to create pores in the area of ​​the plastic film covering the plu...

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Problems solved by technology

Its disadvantages: First, whether it is natural gas (mainly composed of CH 4 ), pipeline gas (the main component is H 2 、CH 4 , CO), or liquefied petroleum gas (the main component is C 3 h 8 、C 4 h 10 、C 3 h 6 、C 4 h 8 ) is a slightly toxic substance. When its combustion flame heats PET, PP, PE, and nylon plastic films, the flame melts the PET, PP, PE, and nylon plastic films at the moment. The edge of the hole directly destroys the flexibility of the plastic film, which will cause friction to the skin, especially the wound surface, which will make the skin feel uncomfortable and affect the healing of the wound surface; the second is to use flame melting holes, and the harmful gas produced when the combustible gas burns directly Pollution to the surface of the melted plastic film and the atmosphere, affecting the safety of plastic film use

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