EN 60674-3-4 to 6:1995

Specification for plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheets 4 to 6: Requirements for polyimide films used for electrical insulation

Gives the requirements for the following polyimide films with or without heat sealable fluoroethylene-propylene (FEP) coatings; based on poly(N,N'-p,p'-oxydiphenylene pyromellitimide)(sheet 4); based on poly(N,N'-p-phenylene biphenyl tetra carboxylimide)(sheet 5); based on poly(N,N'-p,p'-oxydiphenylene biphenyl-tetracarboxylimide)(sheet 6).

Bestimmung für Kunststoff-Isolierfolien für elektrotechnische Zwecke - Teil 3: Bestimmungen für einzelne Werkstoffe - Blätter 4 bis 6: Anforderungen für Polyimide-Folien, die zur elektrischen Isolierung verwandt werden

Spécification pour les films en matière plastique à usages électriques - Partie 3: Spécifications pour matériaux particuliers - Feuilles 4 à 6: Prescriptions pour les films de polyimide utilisés dans l'isolation électrique

Donne les prescriptions relatives aux films de polyimide suivants, avec ou sans revêtement de fluoroéthylène-propylène thermosoudables; à base de poly(N,N'-p,p'-oxydiphénylène pyromellitimide) (feuille 4); à base de poly(N,N'-p-phénylène biphényl tétracarboxylimide) (feuille 5); à base de poly(N,N'-p,p'-oxydiphénylène biphényl-tétracarboxylimide) (feuille 6).

Specification for plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheets 4 to 6: Requirements for polyimide films used for electrical insulation (IEC 60674-3-4 to 6:1993)

General Information

• Status: Published
• Publication Date: 09-Feb-1995
• Withdrawal Date: 30-Nov-1995
• ICS: 29.040.20 - Insulating gases
• ICS: 83.140 - Rubber and plastics products
• 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: 10-Feb-1995
• Completion Date: 10-Feb-1995
• Ref Project: SIST EN 60674-3-4 to 6:1998 - Specification for plastic films for electrical purposes -- Part 3: Specifications for individual materials -- Sheets 4 to 6: Requirements for polyimide films used for electrical insulation

Relations

• Replaced By: EN IEC 60674-3-4:2022 - Plastic films for electrical purposes - Part 3: Specifications for individual materials - Sheets 4: Polyimide films used for electrical insulation
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-junij-1998
Specification for plastic films for electrical purposes - Part 3: Specifications for
individual materials - Sheets 4 to 6: Requirements for polyimide films used for
electrical insulation (IEC 60674-3-4 to 6:1993)
Specification for plastic films for electrical purposes -- Part 3: Specifications for individual
materials -- Sheets 4 to 6: Requirements for polyimide films used for electrical insulation
Bestimmung für Kunststoff-Isolierfolien für elektrotechnische Zwecke -- Teil 3:
Bestimmungen für einzelne Werkstoffe -- Blätter 4 bis 6: Anforderungen für Polyimide-
Folien, die zur elektrischen Isolierung verwandt werden
Spécification pour les films en matière plastique à usages électriques -- Partie 3:
Spécifications pour matériaux particuliers -- Feuilles 4 à 6: Prescriptions pour les films de
polyimide utilisés dans l'isolation électrique
Ta slovenski standard je istoveten z: EN 60674-3-4 to 6:1995
ICS:
29.035.20 3ODVWLþQLLQJXPHQLL]RODFLMVNL Plastics and rubber insulating
PDWHULDOL materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME CEI
INTERNATIONALE IEC
674-3-4 6/to 6
INTERNATIONAL
Première édition
STAN
DARD First edition
1993-03
Spécification pour les films en matière plastique
à usages électriques
Partie 3:
Spécifications pour matériaux particuliers
Feuilles 4 à 6: Prescriptions pour les films de
polyimide utilisés dans l'isolation électrique
Specification for plastic films for electrical
purposes
Part 3:
Specifications for individual materials
Sheets 4 to 6: Requirements for polyimide films
used for electrical insulation
CEI 1993
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in writing from the publisher.
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674-3-4 to 6 © I EC:1993 – 3 –
CONTENTS
Page
FOREWORD 5
INTRODUCTION 7
Clause
1 General 9
1.1 Scope 9
1.2 Normative references 9
1.3 Classification 9
2 Designation 11
3 General requirements 11
4 Dimensions 11
4.1 Thickness 11
4.2 Width 15
Properties 17
5.1 Properties not dependent on thickness 17
5.2 Properties dependent on thickness 19
5.3 Other properties 21
6 Roll characteristics 21
6.1 Roll diameter 21
6.2 Windability/sag 25
6.3 Joins 25
6.4 Roll width 29
6.5 Cores 29
674-3-4 to 6 © IEC:1993 - 5 -
INTERNATIONAL ELECTROTECHNICAL
COMMISSION
SPECIFICATION FOR PLASTIC FILMS FOR
ELECTRICAL PURPOSES
Part 3: Specifications for individual materials
Sheets 4 to 6: Requirements for polyimide films
used for electrical insulation
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.
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.
This International Standard has been prepared by Sub-Committee 15C: Specifications, of
IEC Technical Committee No. 15: Insulating materials.
The text of this standard is based on the following documents:
DIS Repo rts on Voting
150(CO)280` 150(CO)306
150(CO)289* 150(CO)311
150(00)290 + 290A*** 150(00)312
Full information on the voting for the approval of this standard can be found in the Voting
Repo rts indicated in the above table.
Refers to sheet 4.
Refers to sheet 5.
***
Refers to sheet 6.
- 7 -
674-3-4 to 6 © IEC:1993
INTRODUCTION
This International Standard is one of a series which deals with plastic films for electrical
purposes. The series consists of three parts:
Part 1: Definitions and general requirements (IEC 674-1).
Part 2: Methods of test (IEC 674-2).
Part 3: Specifications for individual materials (IEC 674-3).
This standard contains three of the sheets comprising part 3 as follows:
Sheet 4: Requirements for polyimide films based on poly(N,N'-p,p'-oxydiphenylene
pyromellitimide) used for electrical insulation.
Sheet 5: Requirements for polyimide films based on poly(N,N'-p-phenylene biphenyl-
tetracarboxylimide) used for electrical insulation.
Sheet 6: Requirements for polyimide films based on poly(N,N'-p,p'-oxydiphenylene
biphenyl-tetracarboxylimide) used for electrical insulation.

674-3-4 to 6 © IEC:1993 –
9 –
SPECIFICATION FOR PLASTIC FILMS FOR
ELECTRICAL PURPOSES
Part 3: Specifications for individual materials
Sheets 4 to 6: Requirements for polyimide films
used for electrical insulation
1 General
1.1 Scope
This International Standard gives the requirements for the following polyimide, films with
or without heat sealable fluoroethylene-propylene (FEP) coatings.
Sheet 4: Requirements for polyimide films based on poly(N,N'-p,p'-oxydiphenylene
pyromellitimide).
Sheet 5: Requirements for polyimide films based on poly(N,N'-p-phenylene biphenyl tetra
carboxylimide).
Sheet 6: Requirements for polyimide films based on poly(N,N'-p,p'-oxydiphenylene
biphenyl-tetracarboxylimide).
1.2 Normative references
The following normative documents contain provisions which, through reference in this
text, constitute provisions of this International Standard. At the time of publication, the
editions indicated were valid. All normative documents are subject to revision, and parties
to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated
below. Members of IEC and ISO maintain registers of currently valid International
Standards.
IEC 674-1: 1980, Specification for plastic films for electrical purposes - Pa rt 1: Definitions
and general requirements.
IEC 674-2: 1988, Specification for plastic films for electrical purposes - Part 2: Methods
of test.
IEC 757: 1983, Code for designation of colours.
1.3 Classification
The polyimide film shall be of the following types:
Type 1: General purpose
Type 2A: One side coated*
Type 2B: Two sides coated*
Type 2 is surface coated to render the surface(s) heat sealable.

674-3-4 to 6 © IEC:1993 - 11 -
Type 3: Dimensionally stabilized (only generally available in sheets 4 and 5 types)
Type 4: Heat shrinkable (only generally available in sheet 4 types)
Designation
The film shall be identified by the designation which follows:
Designation of the film - IEC 674-3-4 (or 5, or 6) - PI - type - thickness in micrometres -
width in millimetres - length in metres - colour.
Example:
Polyimide film IEC 674-3-4 - PI - type 1 - 100 - 20 - 200 - nc - f
(f = flame retardant; r = regular; nc = natural colour; other colours according to IEC 757).
3 General requirements
Type 1 material shall be a flexible, self-supporting film made from polyimide polymer.
Type 2 shall have a heat sealable coating of fluoroethylene-propylene (FEP) resin on one
or both sides of type 1 material.
Type 3 shall be identical to type 1 except for improved dimensional stability.
Type 4 shall be identical to type 1 except for the heat shrinkability requirement.
All types shall conform to the general requirements laid down in IEC 674-1.
4 Dimensions
4.1 Thickness
The film thickness of types 1, 3 and 4 shall be measured by a gravimetric method in
accordance with 3.3 of IEC 674-2. The thickness of type 2 shall be measured using a
micrometer in accordance with 3.1 of IEC 674-2.
The overall thickness shall be in accordance with the nominal thickness and permitted
range of thickness given in table 1 and 2.

674-3-4 to 6 © IEC:1993 - 13 -
Table 1 - Nominal thickness and permitted range of thicknesses
for types 1, 3 and 4 (in gm)
Actual thickness
Nominal
thickness Limit
Sheet 4 Sheets 5 and 6
7,5 Max. 9 8,5
Min. 6
6,5
13* Max. 15,2
13,5
Min. 10,2 11,5
20 Max. –
Min. – 18
25 Max. 29 27
Min. 22 23
40 Max. – 44
Min. –
50 Max. 57 54
Min. 44 46
Max. 83 81
Min. 69 69
Max. – 107
Min. – 93
125 Max. 136 133
Min. 118 117
The dash "–" indicates that these sizes are not generally available.
' Some manufacturers quote a nominal thickness of 12,5 µm in place of the
13 µm used in the above table. Conformance with this standard indicates that
such material meets the requirements, described in the above-mentioned table
under the heading 13 µm.
Table 2 - Nominal thickness and overall permitted range of thicknesses
for type 2 (in µm)
Nominal thickness Overall permitted range of thicknesses
First Second
Nominal Polyimide Sheet 4 Sheets 5 and 6
Types FEP*
FEP*
thickness layer
layer layer
µm µm µm µm
Min. Max. Min. Max.
2A 25 None 13** 13** 19 31 20 30
38** 33,5 41,5
2A None 25 13** 31 44
2A 50 None 25 25 42 58 46 54
2A 63** None 50 13** 55 71 58,5 66,5
2A 75 None 50 25 65 85 70 80
2A 100 None 50 50 90 110 90 110
2A 100 None 25 90 110 90 110
2A 150 None 125 25 110 160 140 160
30 34
2B 2,5 25 2,5 26 34 26
38** 13** 13'* 45 30 45
2B 13** 30
2B 50 13** 25 13** 42 58 46 54
2B 75 13" 50 13" 65 85 70 80
125 140 110 140
2B 25 75 25 110
*
Fluoroethylene-propylene.
** Some manufacturers quote nominal thicknesses of 12,5 µm, 37,5 µm and 62,5 pm in place of the 13 µm,
38 µm and 63 µm, respectively, used in the above table. Conformance with this standard indicates that
such material meets the requirements, described in the above-mentioned table under the headings of
13 µm, 38 µm and 63 µm, respectively.

-15 -
674-3-4 to 6 © IEC:1993
4.2 Width
The film width shall be measured in accordance with the requirements of clause 5 of
IEC 674-2.
Preferred widths cannot be given on account of the great variety of applications.
The maximum deviation in film width from the nominal shall be as given in tables 3A
and 3B unless otherwise specified in the purchase contract.
Table 3A - Tolerance on slit width for sheet 4 material
Slit width range Tolerance
mm mm
Less than 26 ±0,4
±0,8
26 to 102
Greater than 102 ±1,6
Table 3B - Tolerance on slit width for sheets 5 and 6 material
Slit width range Tolerance
mm
mm
<- 25
±0,2
±0,3
> 25 - 50
> 50 - 100 ±0,5
> 100 - 300 ±1,0
> 300 - 500 ±2,0
±2,0
> 500
674-3-4 to 6 © IEC:1993 -17 -
5 Properties
5.1 Properties not dependent on thickness*
Table 4 - Requirements for all types
Requirements Types
IEC 674-2
Where
Property Unit
Test method
available
Sheet 4
Sheet 5 Sheet 6
Density 1 425 ± 10 1 480 ± 10 1 390 ± 10 kg/m3 4, method D 1) 1, 3, 4
Melting point Does not melt
Does not melt4> Does not melt4) 1, 2, 3, 4
Permittivity 3,5 ± 0,4
3,5 ± 0,4 3,5 ± 0,4 - 16.1 2) 1, 3, 4
3,4 ± 0,4 3,4 ± 0,4 3,4 ± 0,4 (23 °C, 48 Hz - 62 Hz)
(23 °C, 1 kHz)
Dissipation 54,0 x 10-3 55,0 x 10-3 55,0 x 10-3 - 16.1 2) 1, 2, 3, 4
factor 23 °C, 1 kHz
or 48 Hz - 62 Hz
Volume 21 x 10 10
21,0 x 10 13 21,0 x 10 S2 • m 15.1 3) 1, 2, 3, 4
resistivity
Surface 21 x 10 14 >>1,0 x 10 15 21,0 x 10 15 S2 143) 1, 2, 3, 4
resistivity
50,35
Dimensional 50,2 50,2 % 23, 150 °C,  25 1.1111 1
stability 52,50 51,0 53,0 % 23, 400 °C, 225 µm 2
(shrinkage in 50,05 50,04 - % 23, 200 °C, 225 um 3
MD and TD) 5> 55,0 - - % 23, 200 °C, >25 µm
Moisture 54,0 52,0 52,0 % 30, 6 h 1, 2, 3, 4
absorption
* There are no requirements for type 2 for density and permittivi y since they are highly dependent on the
relative thickness of PI and FEP.
1) The recommended mixture is carbon tetrachloride/n-heptane.
2) Use non-contacting electrodes or evaporated metal electrodes.
3) To be measured at 200 °C ± 5 K, after exposure to 200 °C for 1 h.
4) For type 2, the FEP coating shall melt.
5)
MD: machine direction; TD: transverse direction.

674-3-4 to 6 © IEC:199
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