5630/4 International Standard (TSO INTERNATIONAL ORGANIZATION FOR STANDARDIZATION MEXAYHAPOAHAA OPrAHM3AUMA HO CTAHAAPTM3AUWW-ORGANISATION INTE RNATIONALE DE NORMALISATION Paper and board - Accelerated ageing Part 4 : Dry heat treatment at 120 or 150 oC Papier et carton - Vieillissement accelere -- Partie 4 : Traitement a la chaleur a 120 ou 150 oC First edition - 1986-12-15 UDC 676.3/.7 : 620.193.918.2 Ref. No. 1SO 5630/4-1986 (E) Descriptors : paper, paperboards, tests, accelerated tests, aging tests (materials), heat treatment. Pricebased on 3pages Foreword ISo (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standardsis normallycarried out throughISO technical committees.Eachmember mental and non-governmental,in liaison withisO,alsotakepart inthework. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the Iso Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 5630/4 was prepared by Technical Committee ISO/TC 6, Paper,boardandpulps. Users should note that all International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition,unless otherwise stated. ? International Organization for Standardization, 1986 Printed in Switzerland INTERNATIONAL STANDARD ISO 5630/4-1986 (E) Paper and board - Accelerated ageing Part 4 : Dry heat treatment at 120 or 150 oC 0 Introduction This part of iSO 5630 does not contain any statement about the teststobemadeonthepaper.Itislefttotheparties concerned Exposure of paper or board to a hostile environment, such as to determine which tests are appropriate for the type of paper some types of radiation, elevated temperature, or chemical at- being evaluated. tack over a period of hours, may provide information concern- ing the natural changes that may occur in the material over a period of years,!1, 21 2 References Hostile environments that have been used include exposure to Iso 186, Paper and board - Sampling to determine average dry heat, to heat and moisture, to visibie and ultraviolet radia quality. tion, and to sulfur dioxide gas. Iso 187, Paper and board -- Conditioning of samples. Properties compared before and after such exposure include mechanical, chemical and optical properties. IEC Publication 216, Guide for the determination of thermal endurance properties of electrical insulating materials It has been determined that the degradation of cellulose is very Part 1 : General procedures for the determination of with natural ageing indicates that some moisture should be pre- thermal endurance properties, temperature indices and ther- sent in an accelerated ageing atmosphere.(5, 6] Dry accelerated mal endurance profiles. ageing of cellulose is much less sensitive and probably does not rank papers in order of stability as accurately as moist ac- Part 2 : List of materials and available tests. celerated ageing. It is much simpler to use and may be ade- quate for many purposes, but moist accelerated ageing should IEC Pubication 554, Specification for cellulosic papers for elec- be used where the greatest correlation with natural ageing is trical purposes needed. Part 2 : Methods of test. ISo 5630 at present consists of the following parts : Part 3: Specifications for individual materials Part 1 : Dry heat treatment. Sheet 1 : General purpose electrical paper. Part 2 : Moist heat treatment at 90 oC and 25 % relative humidity. 3 Principle Part 3 : Moist heat treatment at 80 °C and 65 % relative humidity. Heating of test pieces of paper or board in a closed oven either for 168 h at 120 oC (Procedure A) or for 24 h at 150 oC (Pro- Part 4 : Dry heat treatment at 120 or 150 oC. cedure B). Co