SIST EN 60371-3-9:1998

Insulating materials based on mica -- Part 3: Specifications for individual materials -- Sheet 9: Moulding micanite

Composed of mica splittings or mica paper, with or without reinforcement, bonded with a suitable binder and may be supplied as sheets or rolls. This specification covers material having a nominal thickness from 0,10 mm to 7 mm.

Isoliermaterialien aus Glimmer -- Teil 3: Bestimmungen für einzelne Materialien -- Blatt 9: Formmikanit

Matériaux isolants à base de mica -- Partie 3: Spécifications pour matériaux particuliers -- Feuille 9: Micanite moulable

Ces micanites sont constituées de clivures de mica ou de papier mica avec ou sans renfort, agglomérés avec un liant adéquat, et peuvent être livrées en feuilles ou en rouleaux. Cette spécification couvre les matériaux ayant une épaisseur nominale de 0,10 mm à 7 mm.

Insulating materials based on mica - Part 3: Specifications for individual materials - Sheet 9: Moulding micanite (IEC 60371-3-9:1995 + corrigendum August 1995)

General Information

• Status: Published
• Publication Date: 31-May-1998
• Withdrawal Date: 17-Sep-2007
• ICS: 29.035.50 - Mica based materials
• Technical Committee: IZO - Insulating materials
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jun-1998
• Due Date: 01-Jun-1998
• Completion Date: 01-Jun-1998
• Ref Project: EN 60371-3-9:1995 - Insulating materials based on mica - Part 3: Specifications for individual materials - Sheet 9: Moulding micanite

Relations

• Amended By: SIST EN 60371-3-9:1998/A1:2007 - Insulating materials based on mica -- Part 3: Specifications for individual materials -- Sheet 9: Moulding micanite
• Effective Date: 01-Nov-2007

Overview

SIST EN 60371-3-9:1998 is a European standard specifying the requirements for insulating materials based on mica, specifically focusing on moulding micanite. Moulding micanite comprises mica splittings or mica paper, with or without reinforcement, bonded by suitable binders and supplied as sheets or rolls. This standard applies to materials with nominal thicknesses ranging from 0.10 mm to 7 mm. It ensures consistent quality and performance of mica-based insulating materials used widely in electrical and electronic applications.

Developed by the International Electrotechnical Commission (IEC) and adopted by the Comité Européen de Normalisation (CEN) as a CLC standard, SIST EN 60371-3-9:1998 provides a detailed framework for manufacturers and users to classify, test, and select moulding micanite materials suitable for insulating purposes in electrical engineering.

Key Topics

• Material Composition
  Moulding micanite consists of mica splittings or mica paper bonded with resins such as shellac, alkyd, epoxy, or silicone. The mica may be reinforced with glass fabric or polyester film, enhancing mechanical strength and electrical insulation.

• Thickness and Dimensions
  The standard covers mica insulation materials from 0.10 mm to 7 mm thickness. Strict tolerances are specified to ensure material uniformity in rolls or sheets, including permissible deviations in width, length, and thickness.

• Thermal and Electrical Performance
  Requirements include thermal endurance according to IEC 216-1 methods, and minimum electrical strength values (kV/mm) are defined per material type, assuring reliable insulation under operational stresses.

• Designation and Classification
  Materials are classified into types (e.g., MS1 to MS7 for mica splittings and MP1 to MP5 for mica paper variants) based on raw material, binder type, reinforcement, mica content, and thickness.

• Quality and Packaging
  The standard mandates uniform surface quality free from defects and specifies packaging practices for protection during transportation and storage. Proper labeling with manufacturing details, material description, batch numbers, and shelf-life information is required.

• Normative References
  Relevant IEC and ISO standards for testing methods, mica grading, and related materials are incorporated, enabling comprehensive assessment and cross-referencing.

Applications

Moulding micanite insulating materials compliant with SIST EN 60371-3-9:1998 find essential applications across electrical engineering sectors:

• Electrical Insulation for High-Temperature Equipment
  Due to excellent thermal endurance, these mica-based materials are suited for insulation in transformers, motors, generators, and high-voltage apparatus where stable dielectric properties at elevated temperatures are critical.

• Electrical Component Manufacturing
  Used as sheets or rolls in the fabrication of capacitors, insulators, and insulating barriers in electronic devices.

• Mechanical and Thermal Reinforcement
  The inclusion of glass fabric or polyester film reinforcement provides mechanical robustness and dimensional stability, ideal for electrical assemblies subjected to mechanical stress and thermal cycling.

• Custom Moulding Processes
  The mouldable nature of these micanite materials enables shaping under heat, supporting specialized component designs demanding precise insulation profiles.

The standard supports manufacturers and engineers in selecting suitable micanite types that meet specific electrical, thermal, and mechanical requirements, ensuring safety, durability, and performance in end-use applications.

Related Standards

SIST EN 60371-3-9:1998 is part of a comprehensive series on mica-based insulating materials and is directly linked to the following relevant standards:

• EN 60371-1 (IEC 371-1): Definitions and General Requirements for insulating materials based on mica.
• EN 60371-2 (IEC 371-2): Methods of Test for electrical and thermal properties of mica insulating materials.
• EN 60371-3-2 (IEC 371-3-2): Specifications for mica paper as an individual mica-based insulating material.
• IEC 216-1: Guidelines for determination of thermal endurance properties in insulating materials.
• IEC 243-1: Test methods for electric strength of solid insulating materials.
• ISO 6386: Standards for grading and visual classification of muscovite mica splittings.
• IEC 554-3-2: Specifications for capacitor paper used in electrical insulation.
• IEC 674-3-2: Specifications for polyethylene terephthalate (PET) film used in electrical insulation.

These standards collectively define quality, testing, and classification protocols to ensure optimal performance and interoperability of mica-based insulating materials in electrical industries.

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Keywords: moulding micanite, mica insulating materials, electrical insulation, IEC 60371-3-9, mica paper, mica splittings, thermal endurance, electrical strength, insulating sheets, electrical components, glass fabric reinforcement, polyester film insulation, mica-based standards, CLC standard, insulation material thickness, electrical equipment insulation.

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-1998
Insulating materials based on mica - Part 3: Specifications for individual materials
- Sheet 9: Moulding micanite (IEC 60371-3-9:1995 + corrigendum August 1995)
Insulating materials based on mica -- Part 3: Specifications for individual materials --
Sheet 9: Moulding micanite
Isoliermaterialien aus Glimmer -- Teil 3: Bestimmungen für einzelne Materialien -- Blatt 9:
Formmikanit
Matériaux isolants à base de mica -- Partie 3: Spécifications pour matériaux particuliers -
- Feuille 9: Micanite moulable
Ta slovenski standard je istoveten z: EN 60371-3-9:1995
ICS:
29.035.50 Materiali na podlagi sljude Mica based materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
60371-3-9
INTERNATIONAL
Première édition
STAN DARD
First edition
1995-08
Matériaux isolants à base de mica —
Troisième partie:
Spécifications pour matériaux particuliers —
Feuille 9: Micanite moulable
Insulating materials based on mica —
Part 3:
Specifications for individual materials —
Sheet 9: Moulding micanite
© IEC 1995 Droits de reproduction réservés — Copyright - all rights reserved
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copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.
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Pour prix, voir catalogue en vigueur
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IEC Publication 371-3-9
Publication 371-3-9 de la CEI
(First edition - 1995)
(Première édition - 1995)
Matériaux isolants à base de mica - Insulating materials based on mica -
Part 3: Specifications for individual materials -
Partie 3: Spécifications pour matériaux particuliers -
Feuille 9: Micanite moulable Sheet 9: Moulding micanite
C O R R I G E N D U M 1*
Page 9
Correction dans le texte anglais unique- 4.3 Glass fabric
ment.
In the second line, instead of:
...
and have a size (binder) content.
read:
...
and have a size content .
Page 10
A l’article 6, remplacer le titre existant
Correction in the French text only.
6 Prescriptions sur le matériau
(tel que reçu)
par le nouveau titre suivant:
6 Prescriptions sur le matériau
( à l’état de réception)
Correction dans le texte anglais unique-
Page 13
ment.
6.3 Thickness
In the heading of the third column of table 3,
instead of
Thickness tolerance
read:
Permissible tolerance
du Comité National Français,
* Selon la demande qui a * At the request of the French National Committee,
décidé d’introduire ces corrections dans la future
which has decided to introduce these corrections in the
Norme Nationale Française, les modifications éditoria- future French National Standard, the following editorial
les suivantes sont nécessaires.
changes should be made.
Août 1995 August 1995
371-3-9 © IEC:1995 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
INSULATING MATERIALS BASED ON MICA -
Part 3: Specifications for individual materials -
Sheet 9: Moulding micanite
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to
promote international cooperation on all questions concerning standardization in the electrical and
electronic fields. To this end and in addition to other activities, the IEC publishes International Standards.
Their preparation is entrusted to technical committees; any IEC National Committee interested in
the subject dealt with may participate in this preparatory work. International, governmental and
non-governmental organizations liaising with the IEC also participate in this preparation. The IEC
collaborates closely with the International Organization for Standardization (ISO) in accordance with
conditions determined by agreement between the two organizations.
2)
The formal decisions or agreements of the IEC on technical matters, prepared by technical committees on
which all the National Committees having a special interest therein are represented, express, as nearly as
possible, an international consensus of opinion on the subjects dealt with.
3)
They have the form of recommendations for international use published in the form of standards, technical
reports or guides and they are accepted by the National Committees in that sense.
4)
In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter. The text of this standard is based on the following documents:
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
International Standard IEC 371-3-9 has been prepared by IEC by sub-committee 15C:
Specifications, of IEC technical committee 15: Insulating materials.
The text of this standard is based on the following documents:
DIS Report on voting
15C/476/DIS 15C/530/R V D
Full information on the voting for the approval of this standard can be found in the repo rt
on voting indicated in the above table.

371-3-9 © IEC:1995 –5-
INTRODUCTION
This International Standard is one of a series which deals with insulating materials built up
from 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).
Specifications for individual materials (IEC 371-3).
Part 3:
This standard contains one of the sheets comprising part 3, as follows:
Sheet 9: Moulding micanite.
371-3-9©I EC:1995 - 7 -
INSULATING MATERIALS BASED ON MICA -
Part 3: Specifications for individual materials -
Sheet 9: Moulding micanite
1 Scope
This International Standard specifies the requirements for different types of moulding
micanite. They are composed of mica splittings or mica paper, with or without rein-
forcement, bonded with a suitable binder and may be supplied as sheets or rolls.
Moulding micanites with B-stage resins are of a consistency ranging from rigid to soft.
All types are mouldable when heated.
This specification covers material having a nominal thi
...