ISO INTERNATIONAL STANDARD 14616 First edition 1997-07-01 Plastics - Heatshrinkable films of polyethylene, ethylene copolymers and their mixtures -- Determination of shrinkage stress and contraction stress Plastiques - Films thermoretractables en polyethylene, en copolymeres d'éthylene et leurs melanges -Determination des contraintes de refraction et de contraction Reference number ISO14616:1997(E) y IHS under ted without license from IHS Not for Resale ISO 14616:1997(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies).The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non- governmental, in liaison with Iso, also take part in the work. .ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IsO 14616 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. @ISO1997 All rights reserved.Unless otherwise specified,no partofthis publication maybe reproduced microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20. Switzerland Internet [email protected] X.400 C=ch; a=400net; p=iso; o=isocs; S=central Printed in Switzerland HS ur t license from IHS Not for Resale ISO 14616:1997(E) INTERNATIONALSTANDARD ISO Plastics - Heatshrinkable films of polyethylene, ethylene copolymers and their mixtures -- Determination of shrinkage stress and contraction stress 1 Scope The purpose of this standard is to describe a conventional method for measuring the shrinking and contracting forces of heatshrinkable films made from polyethylene, ethylene copolymers and their mixtures. materials under proper operating conditions. NOTE 1 This method also allows a shrinkage ratio to be assessed. However the reference method for measuring the shrinkage ratio is Iso 11501, Plastics - Film and sheeting - Determination of dimensional change on heating. 2 Definitions For the purposes of this standard, the following definitions apply: 2.1 heatshrinkable film: Film which is extruded and stretched (hot drawn) during manufacture and which remains in this state after cooling down. stress was induced and then fixed during its manufacture, this stress is liberated and the film shrinks back. Depending on the treatment applied, the film can be either heatshrinkable both lengthwise and crosswise: this film is called "biaxially oriented", or mainly heatshrinkable lengthwise: this film is called "uniaxially oriented" initial specimen length. 2.3 shrinking force, F,: Force developed by the film when it reaches the temperature corresponding to that at which the stress was induced at the time of manufacture. Copyright Interna onal Organization for Standardization Not for Resale