1、NORME INTERNATIONALE INTERNATIONAL STANDARD CE1 IEC 60674-1 Premire dition First edition 1980-01 Spcification pour les films en matire plastique usages lectriques Premire partie: Dfinit ions et prescriptions gnrales Specification for plastic films for electrical purposes Part 1 : Definitions and gen
2、eral requirements Numro de rfrence Reference number CEI/IEC 60674-1: 1980 Numros des publications Numbering Depuis le ler janvier 1997, les publications de la CE1 sont numrotes partir de 60000. Publications consolides Les versions consolides de certaines publications de la CE1 incorporant les amende
3、ments sont disponibles. Par exemple, les numros ddition 1.0, 1.1 et 1.2 indiquent respectivement la publication de base, la publication de base incorporant lamendement 1, et la publication de base incorporant les amendements 1 et 2. Validit de la prsente publication Le contenu technique des publicat
4、ions de la CE1 est constamment revu par la CE1 afin quil reflte ltat actuel de la technique. Des renseignements relatifs la date de reconfir- mation de la publication sont disponibles dans le Catalogue de la CEI. Les renseignements relatifs des questions ltude et des travaux en cours entrepris par l
5、e comit technique qui a tabli cette publication, ainsi que la liste des publications tablies, se trouvent dans les documents ci- dessous: Site web de la CEP Catalogue des publications de la CE1 Publi annuellement et mis jour rgulirement (Catalogue en ligne)* Bulletin de la CE1 Disponible la fois au
6、on dit alors que le film prsente un ) ou da allongement . -5- SPECIFICATION FOR PLASTIC FILMS FOR ELECTRICAL PURPOSES Part 1 : Definitions and general requirements INTRODUCTION This standard is one of a series which deals with plastic films for electrical purposes. The series will consist of three p
7、arts : Part 1 : Definitions and general requirements. Part 2: Methods of test (Publication 674-2). Part 3 : Specifications for individual materials (Publication 674-3). 1. Scope This standard is applicable to plastic films used for electrical purposes. This Part 1 gives definitions for, and specifie
8、s general requirements to be fulfilled by, plastic Brns used for electrical purposes. 2. Definitions For the purpose of this standard, the following definitions apply: 2.1 Bias - Camber When a length of slit film is laid flat on a plain surface, it will usually lie with its edges forming parallel st
9、raight lines. However, if the film contains a distortion such that one edge of the slit length is slightly longer than the other, the length will lie with its edges forming parallel, curved lines and the slit film is said to exhibit “bias”. This form of distortion is sometimes known as the “curved s
10、word effect”, and film exhibiting this distortion is said to “wander” or is said not to “track” correctly. 2.2 Sag If a length of slit film is supported near its extremities (e.g. by draping it over a pair of parallel rollers or bars) so that the film is under light, uniform mechanical tension and l
11、ies approximately in a horizontal plane, the length of film will usually form a smooth catenary surface. However, if the flm contains a distortion such that certain areas lie below the general level of the catenary surface, the film is said to exhibit “sag” or “bagginess”. This distortion arises fro
12、m the stretching of certain portions of the film either during manufacture or subsequent handling. Where sag occurs at a slit edge, it may be known as “edge sag”, “edge flute”, “cockle” or “droop”. When the sag occurs along a line within the width of the film it forms a “sag lane”, “pucker lane”, “s
13、tretch lane” or “gauge band”. -6- 7.3 Spiralage Dplacement axial de sections enroules par rapport aux autres sections. En anglais ( telescoping , cet effet tirant son nom de la similitude visuelle avec les tubes dallonge dune lunette optique par- tiellement tire. 3. Prescriptions gnrales 3.1 3.2 3.3
14、 3.4 Qualit Tout matriau dune mme fourniture doit tre homogne. Les proprits du film se situeront dans les limites indiques dans la prsente norme pour toute la longueur de chaque rouleau. La surface sera uniforme et le film sera essentiellement exempt de dfauts tels que plis, dchirures, bulles, piqre
15、s, inclusions de corps trangers. Rouleaux Le diamtre extrieur de chaque rouleau doit se situer dans les limites ayant fait lobjet dun accord entre utilisateur et fournisseur. Les rouleaux doivent tre essentiellement circulaires et suffi- samment serrs pour viter le spiralage au cours du transport et
16、 de lusage normal ultrieur. Les rouleaux doivent pouvoir tre drouls aisment. Il ne doit y avoir aucune bande rigide qui pourrait nuire au bon droulement et lemploi. Sauf spcification contraire, aucune face dextrmit dun rouleau ne doit, en un point quelconque, scarter de plus de 1 mm de son plan prin
17、cipal, per- pendiculaire laxe du mandrin. Joints Si les joints sont admis, leur nombre sera conforme aux prescriptions indiques dans la troisime partie ( ltude). Si les joints sont admis, ils doivent pouvoir supporter les contraintes mcaniques et thermiques inhrentes lusage ultrieur. Les prescriptio
18、ns spciales comme la visibilit et la rsistance la chaleur ou aux solvants doivent faire lobjet dun accord entre utilisateur et fournisseur. Les joints doivent tre aussi minces que possible et peuvent tre raliss par des procds de fusion comme le raccordement par soudage ou par ruban adhsif. Si ce der
19、nier moyen est retenu, le ruban ne doit pas, de prfrence, tre plus pais que le film lui-mme ni donner lieu des exsudations. Les joints ne doivent pas entraver le droulement du film; ils doivent tre clairement apparents si on les observe partir des faces extrmes du rouleau, sauf en cas daccord contra
20、ire pass entre utilisateur et fournisseur. Mandrins Le matriau est fourni enroul sur un mandrin cylindrique. Le mandrin ne doit pas scailler, scraser ni se dformer sous la tension de droulement et denroulement; il ne doit pas non plus endommager ni dgrader le film. Lutilisateur et le fournisseur doi
21、vent se mettre daccord sur toutes les proprits et dimensions du mandrin avec les tolrances associes. Les diamtres prfrentiels intrieurs des mandrins sont 76 mrn et 150 mm avec une tolrance de 51 %. Les extrmits du mandrin peuvent sarrter au droit des bords de lenroulement ou les dpasser; lutilisateu
22、r et le fournisseur doivent conclure un accord sur le diwositif retenu avec ses tolrances. -7- 2.3 Telescoping The axial shifting of sections of the reel of film relative to other annular sections. The effect is so named because of the visual similarity with the draw-tubes of a partly extended optic
23、al telescope. 3. General requirements 3.1 Quality All material in any one consignment shall be consistent. The properties of the film shall be within the limits of this standard throughout the whole length of each roll. The surface shall be uniform and the film shall be substantially free from defec
24、ts such as creases, tears, gas bubbles, pinholes, inclusions of foreign matter. 3.2 Rolls The outside diameter of each roll shall be within the range agreed between the purchaser and supplier. The rolls shall be essentially circular and shall be wound sufficiently tightly to avoid tele- scoping duri
25、ng transit and subsequent normal use. Rolls shall be capable of being unrolled easily. There shall be no hard bands which adversely affect unwinding and use. In any roll each end face shall at no point depart from its principal plane per- pendicular to the axis of the core by more than f l mm unless
26、 otherwise specified. 3.3 Joins (splices) The number of joins (splices), where these are permitted, shall be in accordance with the require- ments given in Part 3 (under consideration). Where joins are permitted, they shall be suitable to withstand the mechanical and thermal stresses normally encoun
27、tered in subsequent use. Special requirements such as visibility, heat or solvent resistance, shall be agreed upon between purchaser and supplier. Joins shall be as thin as possible and may be made by fusion processes such as, for example, welding or with adhesive tape. Adhesive tape, if used, shall
28、 be preferably not thicker than the film itself and there shall be no exudation of or from the adhesive. Joins shall not impair the unwinding of the lm and shall be clearly visible when viewed from the end faces of the roll, unless otherwise agreed between purchaser and supplier. 3.4 Cores The mater
29、ial shall be supplied rolled on a round core. The core shall not flake, collapse or distort under winding tension, nor shall it damage or cause degradation of the lni. The purchaser and supplier shall agree on all core properties and dimensions including the associated tolerances. The preferred inner diameters of the core are 76 mm and 150 mm with a tolerance of fl %. Cores may protrude at each end of the roll or be flush with the ends and the purchaser and supplier should agree on which arrangement is to be used and on the associated tolerances.
