The invention relates to a blown film plant (BA) for continuously producing an extruded and simultaneously biaxially stretched, single- or multi-layered film (PF) made of plastic in the form of a tubular film (PFS), wherein the blown film plant (BA) has a vertical flat fixing unit (VFFU) having a heating means (VFFUHU), to a process for continuously producing the tubular film (PFS), and to corresponding uses. A vertical flat fixing unit (VFFU) for an extruded and simultaneously biaxially stretched, single- or multi-layered film (PF) made of plastic in the form of a laid-flat tubular film (PFS), wherein the machine direction (MD) of the vertical flat fixing unit (VFFU) deviates from the vertical (V) by at most 15°, preferably at most 10°, more preferably at most 5°, and is especially parallel to the vertical (V); wherein the vertical flat fixing unit (VFFU) has a holder means (HE); wherein the holder means (HE) is suitable or configured for holding the laid-flat tubular film (PFS), preferably at its lateral edges; wherein the holder means (HE) is suitable or configured for guiding or moving or transporting the laid-flat tubular film (PFS) in the machine direction (MD) of the vertical flat fixing unit (VFFU); wherein the holder means (HE) is not suitable or configured for stretching the laid-flat tubular film (PFS) in the machine direction (MD) or in the transverse direction (TD) of the vertical flat fixing unit (VFFU) when said laid-flat tubular film (PFS) is guided in the vertical flat fixing unit (VFFU); and wherein the holder means (HE) is preferably configured such that it allows relaxing of the laid-flat tubular film (PFS) of at most 15%, preferably at most 10%, especially at most 5%, in the machine direction (MD), in the transverse direction (TD) or in each of the machine direction (MD) and the transverse direction (TD) of the vertical flat fixing unit (VFFU) when the laid-flat tubular film (PFS) is guided or moved or transported; wherein the vertical flat fixing unit (VFFU) has a heating means (VFFUHU) for heating the laid-flat tubular film (PFS), wherein the heating means (VFFUHU) of the vertical flat fixing unit (VFFU) can be used to supply the laid-flat tubular film (PFS) with heated air, infrared radiation, ultrasonic radiation, steam or any combination thereof, preferably heated air, infrared radiation or steam, as heating medium.
- 출원번호 : EP2025/071123
- 출원인 : KUHNE ANLAGENBAU GMBH
- 특허번호 :
- IPC : B29C-048/00(2019.01);B29C-048/91(2019.01);B29C-071/00(2006.01);B29C-071/02(2006.01);B32B-027/16(2006.01);B29C-035/04(2006.01);B29C-035/08(2006.01);