EN 60371-3-6:1995

Specification for insulating materials based on mica - Part 3: Specifications for individual materials - Sheet 6: Glass-backed mica paper with a B-stage epoxy resin binder

Gives requirements for materials made by combining mica paper with glass fabric and impregnating the mica paper with an epoxy resin. The material is supplied in a flexible state for final cure after application in the form of sheets or rolls.

Bestimmung für Glimmererzeugnisse für elektrotechnische Zwecke - Teil 3: Bestimmungen für einzelne Materialien - Blatt 6: Glasgewebeverstärktes Glimmerpapier mit Epoxidharz-Bindemittel im B-Zustand

Spécification pour les matériaux isolants à base de mica - Partie 3: Spécifications pour matériaux particuliers - Feuille 6: Papier de mica renforcé de verre avec un agglomérant en résine époxyde à l'état B

Donne les prescriptions concernant les matériaux obtenus en combinant du papier de mica avec du tissu de verre et en imprégnant le papier de mica avec une résine époxyde. Le matériau est fourni pour traitement de durcissement après application, sous forme de feuille ou de rouleaux.

Specifikacija za izolacijske materiale na temelju sljude – 3. del: Specifikacije za posamezne materiale – 6. list: Sljudni papir na steklu z vezivom iz epoksidne smole B (IEC 60371-3-6:1992)

General Information

• Status: Published
• Publication Date: 14-Jun-1995
• Withdrawal Date: 14-Dec-1995
• ICS: 29.040.20 - Insulating gases
• Technical Committee: CLC/SR 15 - Insulating materials
• Drafting Committee: IEC/TC 15 - IEC_TC_15
• Parallel Committee: IEC/SC 15C - IEC_SC_15C
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 15-Jun-1995
• Completion Date: 15-Jun-1995
• Ref Project: SIST EN 60371-3-6:1998 - Specification for insulating materials based on mica -- Part 3: Specifications for individual materials -- Sheet 6: Glass-backed mica paper with a B-stage epoxy resin binder

Relations

• Amended By: EN 60371-3-6:1995/A1:2006 - Specification for insulating materials based on mica - Part 3: Specifications for individual materials - Sheet 6: Glass-backed mica paper with a B-stage epoxy resin binder
• Effective Date: 29-Jan-2023

Overview

EN 60371-3-6:1995 (CLC) specifies requirements for glass-backed mica paper impregnated with a B‑stage epoxy resin binder. The standard covers materials produced by combining mica paper with glass fabric and impregnating the mica layer with an epoxy system so the product is supplied in a flexible B‑stage state for final curing after application. Supply forms include sheets or rolls, with nominal thicknesses covered from 0.09 mm to 0.28 mm.

Key topics and technical requirements

• Composition and designation
  • Products are designated by sheet and type numbers (example: IEC 371-3-6: type 6.1.01) and a descriptive code such as G32/M75/R71 (glass/mica/resin mass per unit area).
  • Composition limits, resin content and tolerances are defined in tabulated form in the standard.
• Raw materials
  • Mica paper must comply with IEC 371-3-2 requirements.
  • Glass fabric is normally loom-state and must have size content ≤ 3% by weight.
  • Any epoxy resin system may be used provided the finished product meets the specification.
• Dimensions, handling and packaging
  • Preferred tape widths (10–50 mm) and full-width availability up to 1000 mm; width tolerances are specified.
  • Rolls should be compactly wound on cores (25, 40, 55 or 76 mm ID), limited joins per consignment, and specified preferred lengths (25, 50, 100, 150 m).
• Performance (as received and after curing)
  • Resin flow (measured at 160 ± 2 °C): 40–70%.
  • Density (after curing): 1.8–2.2 g/cm3.
  • Flexural strength (after curing): ≥150 N/mm2 at 23 ± 2 °C and ≥100 N/mm2 at 155 ± 5 °C.
  • Elastic modulus: ≥30 kN/mm2.
  • Electric strength: ≥30 kV/mm (tested per IEC 243-1 electrode configuration).
  • Dissipation factor (48–62 Hz) limits: e.g., max 0.02 at 30 °C, 0.07 at 130 °C, 0.20 at 155 °C.
  • Thermal index (endurance): temperature index ≥155 °C (50% flexural strength end-point).

Applications and users

• Typical use: electrical insulation where a flexible, mica-based, high-temperature dielectric is required - for example in insulating tapes, coil insulation, phase barriers and form-wound components.
• Primary users: insulation-material manufacturers, electrical equipment OEMs, procurement and quality engineers, test laboratories and standards writers who need a clear specification for mica‑based, epoxy‑impregnated insulating materials.

Related standards

• IEC 371-2 (Methods of test for mica-based insulating materials)
• IEC 371-3-2 (Mica paper specifications)
• IEC 243-1 (Electric strength test methods)
• Note: EN 60371-3-6 corresponds to IEC 60371-3-6 (1992) as adopted in the European/CLC context.

Keywords: EN 60371-3-6, glass-backed mica paper, B‑stage epoxy resin, insulating materials, mica-based materials, electrical insulation, resin flow, thermal index.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Specifikacija za izolacijske materiale na temelju sljude – 3. del: Specifikacije za posamezne materiale – 6. list: Sljudni papir na steklu z vezivom iz epoksidne smole B (IEC 60371-3-6:1992)Bestimmung für Glimmererzeugnisse für elektrotechnische Zwecke -- Teil 3: Bestimmungen für einzelne Materialien -- Blatt 6: Glasgewebeverstärktes Glimmerpapier mit Epoxidharz-Bindemittel im B-ZustandSpécification pour les matériaux isolants à base de mica -- Partie 3: Spécifications pour matériaux particuliers -- Feuille 6: Papier de mica renforcé de verre avec un agglomérant en résine époxyde à l'état BSpecification for insulating materials based on mica -- Part 3: Specifications for individual materials -- Sheet 6: Glass-backed mica paper with a B-stage epoxy resin binder29.035.50Materiali na podlagi sljudeMica based materialsICS:Ta slovenski standard je istoveten z:EN 60371-3-6:1995SIST EN 60371-3-6:1998en01-junij-1998SIST EN 60371-3-6:1998SLOVENSKI
STANDARD
CODE PRIXPRICE CODELNORMECEIINTERNATIONALEIECINTERNATIONAL60371-3-6STAN DARDPremière éditionFirst edition1992-11Spécification pour les matériaux isolantsà base de micaTroisième partie:Spécifications pour matériaux particuliersFeuille 6: Papier de mica renforcé de verre avecun agglomérant en résine époxyde à l'état BSpecification for insulating materialsbased on micaPart 3:Specifications for individual materialsSheet 6: Glass-backed mica paper witha B-stage epoxy resin binder© IEC 1992 Droits de reproduction réservés — Copyright - all rights reservedAucune partie de cette publication ne peut être reproduite niNo part of this publication may be reproduced or utilized inutilisée sous quelque forme que ce soit et par aucunany form or by any means, electronic or mechanical,procédé, électronique ou mécanique, y compris la photo-including photocopying and microfilm, without permission incopie et les microfilms, sans l'accord écrit de l'éditeur.writing from the publisher.International Electrotechnical Commission3, rue de Varembé Geneva, SwitzerlandTelefax: [phone]e-mail: [e-mail] web site http: //www.iec.chCommission Electrotechnique InternationaleInternational Electrotechnical CommissionMemigyHapoiniaR 311eKTp0TexHH4eCHÜH KOMHCCHAPour prix, voir catalogue en vigueur•For price, see current catalogueIEC•SIST EN 60371-3-6:1998

371-3-6 ©I EC– 3 –CONTENTSPageFOREWORD 5INTRODUCTION 7Clause1Scope 92Normative references 93Designation 94Requirements: raw materials 135Requirements: composition and tolerances 136Requirements for material (as received)
157Requirements for material after curing 178Packing
21SIST EN 60371-3-6:1998
371-3-6 ©IEC– 5 –INTERNATIONAL ELECTROTECHNICAL COMMISSIONSPECIFICATION FOR INSULATING MATERIALS BASED ON MICAPart 3: Specifications for individual materialsSheet 6: Glass-backed mica paperwith a B-stage epoxy resin binderFOREWORD1)The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees onwhich all the National Committees having a special interest therein are represented, express, as nearly aspossible, an international consensus of opinion on the subjects dealt with.2)They have the form of recommendations for international use and they are accepted by the NationalCommittees in that sense.3)In order to promote international unification, the IEC expresses the wish that all National Committeesshould adopt the text of the IEC recommendation for their national rules in so far as national conditions willpermit. Any divergence between the IEC recommendation and the corresponding national rules should, asfar as possible, be clearly indicated in the latter.4)The IEC has not laid down any procedure concerning marking as an indication of approval and has noresponsibility when an item of equipment is declared to comply with one of its recommendations.This International Standard has been prepared by Sub-Committee 15C: Specifications, ofIEC Technical Committee No. 15: Insulating materials.The text of this standard is based on the following documents:DISReport on Voting
15C(CO)29315C(CO)318Full information on the voting for the approval of this standard can be found in the VotingReport indicated in the above table.SIST EN 60371-3-6:1998

371-3-6 ©IEC– 7 –INTRODUCTIONThis International Standard is one of a series which deals with insulating materials built upfrom mica splittings or mica paper.The series consists of three parts:Part 1: Definitions and general requirements (IEC 371-1).Part 2: Methods of test (IEC 371-2).Part 3: Specifications for individual materials (IEC 371-3).This standard contains one of the sheets comprising part 3, as follows:Sheet 6: Glass-backed mica paper with a B-stage epoxy resin binder.SIST EN 60371-3-6:1998

371-3-6 ©IEC– 9 –SPECIFICATION FOR INSULATING MATERIALS BASED ON MICAPart 3: Specifications for individual materialsSheet 6: Glass-backed mica paperwith a B-stage epoxy resin binder1 ScopeThis International Standard gives requirements for electrical insulating materials made bycombining mica paper with glass fabric and impregnating the mica paper with an epoxyresin. The material is supplied in a flexible state with the resin in the B-stage for final cureafter application. It may be supplied in the form of sheets or rolls.The specification covers material having nominal thickness from 0,09 mm to 0,28 mm.2 Normative referencesThe following normative documents contain provisions which, through reference in thistext, constitute provisions of this International Standard. At the time of publication, theeditions indicated were valid. All normative documents are subject to revision, and partiesto agreements based on this International Standard are encouraged to investigate thepossibility of applying the most recent editions of the normative documents indicatedbelow. Members of IEC and ISO maintain registers of currently valid InternationalStandards.!EC 243-1: 1988, Methods of test for electric strength of solid insulating materials - Part 1:Tests at power frequencies.IEC 371-2: 1987, Specification for insulating materials based on mica. Part 2: Methods oftest.IEC 371-3-2: 1991, Specification for insulating materials based on mica - Part 3: Specifi-cations for individual materials - Sheet 2: Mica paper.3 DesignationWhen ordering materials to this specification only the specification and type numbers needbe quoted (see tables 1 and 2).Example: IEC 371-3-6: type 6.1.01SIST EN 60371-3-6:1998

371-3-6 © I EC-11 -The type number is derived from:-the specification sheet number6-plus the sheet table number6.1plus the number of the product in the sheet table6.1.01.The descriptive code quoted in tables 1 and 2, for example G32/M75/R71 for type 6.1.01,table 1 is derived from:-glass content (G) 32 g/m2-muscovite mica content (M) 75 g/m2resin content (R) 71 g/m2.NOTE - For phiogopite mica paper the letter "M" is replaced by the letter "P" (table 2 only).Table 1 - Composition for calcinated muscovite mica paper(IEC 371-3-2, classes 1 and 2)GlassMicaResinMass/PermissibleDescriptivecontentcontentcontentunit areathickness rangeVolatilecontentTypecodeg/m2g/m2g/m2g/m2mmNom.Tol.Nom.Tol.Nom.Tol.Nom.Tol.MeanIndividualMax. %±±±±6.1.01G32/M75/R71323756719178190,12-0,150,11-0,161,06.1.02G32/M80/R71323807719183190,12-0,150,11-0,161,06.1.03G32/M90/R813239088110203210,15-0,180,14-0,191,06.1.04G32/M120/R1053231201010513257260,18-0,220,17-0,231,06.1.05G32/M150/R1203231501212015302300,20-0,240,19-0,251,06.1.06G32/M160/R1303231601313016322320,20-0,240,19-0,251,06.1.07G32/M180/R1503231801515019362370,22-0,260,21-0,271,06.1.08G32/M240/R1803232402018023452450,26-0,300,25-0,311,06.1.09G32/M250/R190323250211
...