Treatment of polyester structure

Claim 1

THE PROCESS OF TREATING FILM OF SNYTHETIC LINER POLYESTERS OF A GLYCOL OF THE SERIES HO(CH2)NOH WHERIN N IS A WHOLE NUMBER WITHIN THE RANGE OF 2-10 INCLUSIVE AND ACIDS SELECTED FROM THE GROUPE CONSISTING OF (1) TEREPHTHALIC ACID AND (2) A MIXTURE OF TEREPHATHALIC ACID WITH UP TO20% BY WEIGHT BAESD ON THE TOTAL WEIGHT OF ACIDS, OF A SECOND ACID SELECTED FROM THE GROUPE CONSISTING OF ISOPHTHALIC ACID, DIBENZIO ACID, HEXAHYDROTEREPHTHALIC ACID ADIPOC ACID, SEBACIC ACID, AZAELIC ACID, NAPHTHALIC ACID, 2,5-DIMETHYL TEREPHTHALIC ACID AND BIS-P-CARBOXYPHENOXY ETHANE, WHICH COMPRISES SUBJECTING THE SURFACE OF SAID FILM TO THE ACTION OF A GASEOUS ATMOSPHERE CONTAINING AS THE SOLE REACTIVE INGREDIENTS CHLORINE GAS AND OZONE THE RATIO OF THE VOLUME OF CHLORINETO THE VOLUME OF OZONE IN SAID ATMOSPHERE BEING WITHIH THE RANGE OF FROM 0.625/1 TO 150/1, SAID ATMOSPHERE CONTAINING FROM 5% TO 75% OF CHLORINE BASED ON THETOTAL VOLUME OF SAID ATMOSPHERE, THE ACTION BEING CARRIED OUT IN THE PRESENCE OF LTRA-VIOLET LIGHT HAVING WAVE-LENGTHS OF 2500-3200 A. AT A TEMPERATURE WITHIN THE RANGE OF FROM 25*C. TO 150*C FOR A PERIOD OF TIME SUFFICENT TO THE RENDER THE FILM HEAT-SEALABLE AT A HEAT-SEAL TEMPERATURE OF ABOUT 193*C. TO FORM WATERINSENSITIVE SEALS.