Method of manufacturing plastics film

B - Operations – Transporting – 26 – F

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B26F 1/28 (2006.01) B29C 59/10 (2006.01)

Patent

CA 2301668

A method of producing plastics film (8) wherein high-voltage pulses (Figure 2) are impressed between a pair of electrodes (4, 6), thereby creating pores in a plastics film which is fed into the spark gap (5) between said electrodes, characterised in that the number of discharge sparks which are generated subsequent to the pore-opening discharge spark is controlled by monitoring the pore-opening discharge spark and subsequent discharge sparks within one of the said high-voltage pulses. The method produces fine pores having a uniform pore diameter under controlled circumstances.

On décrit un procédé de production d'un film plastique (8) dans lequel on applique des impulsions haute tension (Figure 2) entre une paire d'électrodes (4, 6), pour créer ainsi des pores dans le film plastique qui est ensuite envoyé dans l'éclateur (5) situé entre lesdites électrodes. Le procédé de production de cette invention se caractérise en ce que le nombre d'étincelles de décharge qui sont générées après l'étincelle de décharge ouvrant les pores est régulé au moyen de la surveillance de l'étincelle de décharge ouvrant les pores et des étincelles de décharge suivantes dans une desdites impulsions haute tension. Le procédé permet de produire dans des conditions régulées des pores fins présentant un diamètre de pore uniforme.

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