SIST EN ISO 14526-3:2000

Plastics - Phenolic powder moulding compounds (PF-PMCs) - Part 3: Requirements for selected moulding compounds (ISO 14526-3:1999)

This part of ISO 14526 specifies the requirements for the physical and chemical properties of phenolic powder
moulding compounds (PF-PMCs) and compression- or injection-moulded test specimens produced from them.
It is limited to those powder moulding compounds whose composition and properties are significantly different. It is
further limited to those moulding compounds which are of general technical and/or economic importance.
The properties which are used to characterize the moulding compounds, the test methods and the test conditions
are selected from those given in ISO 14526-2.
The moulding compounds are divided into types according to their composition and properties. The various types
are designated using the designation system defined in ISO 14526-1.

Kunststoffe - Rieselfähige Phenol-Formmassen (PF-PMC) - Teil 3: Anforderungen an ausgewählte Formmassen (ISO 14526-3:1999)

In diesem Teil von ISO 14526 werden die Anforderungen an physikalische und chemische Eigenschaften von rieselfähigen Phenol-Formmassen (PF-PMC) und daraus formgepreßten oder spritzgegossenen Probekörpern festgelegt. Die Auswahl ist auf solche Formmassen begrenzt, deren Zusammensetzung und Eigenschaften sich deutlich unterscheiden. Außerdem ist die Auswahl auf die Formmassen begrenzt, die von allgemeinerer technischer und/oder wirtschaftlicher Bedeutung sind.

Plastiques - Poudres a mouler phénoliques (PF-PMC) - Partie 3: Exigences relatives a certaines poudres a mouler (ISO 14526-3:1999)

La présente partie de l'ISO 14526 spécifie les caractéristiques physiques et chimiques des poudres à mouler
phénoliques (PF-PMC) et des éprouvettes moulées par injection ou par compression, produites à partir de ces
poudres.
Elle se limite aux poudres à mouler dont la composition et les propriétés diffèrent de manière significative. En
outre, elle ne concerne que les poudres à mouler dont l'importance technique et/ou économique est assez
générale.
Les propriétés qui sont utilisées pour caractériser les poudres à mouler, ainsi que les méthodes et conditions
d'essai, sont choisies parmi celles indiquées dans l'ISO 14526-2.
Les poudres à mouler sont réparties en différents types selon leur composition et leurs propriétés. Ces divers types
sont désignés en utilisant le système de désignation défini dans l'ISO 14526-1.

Polimerni materiali - Fenolne praškaste zmesi za oblikovanje (PF-PMCs) - 3. del: Zahteve za izbrane zmesi za oblikovanje (ISO 14526-3:1999)

General Information

• Status: Published
• Publication Date: 30-Nov-2000
• ICS: 83.080.10 - Thermosetting materials
• Technical Committee: IPMA - Polimer materials and products
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Dec-2000
• Due Date: 01-Dec-2000
• Completion Date: 01-Dec-2000
• Ref Project: EN ISO 14526-3:1999 - Plastics - Phenolic powder moulding compounds (PF-PMCs) - Part 3: Requirements for selected moulding compounds (ISO 14526-3:1999)

Relations

• Replaces: SIST ISO 800:1996 - Plastics -- Phenolic moulding materials -- Specification
• Effective Date: 01-Mar-2015

Overview

SIST EN ISO 14526-3:2000 sets forth the requirements for selected phenolic powder moulding compounds (PF-PMCs), a key category of thermosetting plastics used in numerous industrial applications. This standard, developed by the International Organization for Standardization (ISO) and adopted by CEN, specifies the physical and chemical properties essential for PF-PMCs along with the testing methods and conditions for compression and injection-moulded specimens.

The document focuses on moulding compounds with significantly different compositions and properties, highlighting those of substantial technical or economic relevance. It supplements companion parts ISO 14526-1 and ISO 14526-2, which cover the designation system and test specimen preparation respectively.

Key Topics

Property Requirements

EN ISO 14526-3 defines requirements across multiple property categories:

• Mechanical properties: Stress at break, flexural strength, and Charpy impact strength (both notched and unnotched).
• Thermal properties: Temperature of deflection under load at different time intervals and flammability characteristics.
• Electrical properties: Dissipation factor, volume and surface resistivity, and proof tracking index.
• Other parameters: Water absorption and free ammonia content.

Test results must meet stringent statistical limits to ensure consistency and reliability across batches. However, rheological and processing properties are not strictly limited but must meet mutually agreed standards for satisfactory moulding.

Designation and Classification

The standard classifies PF-PMCs into distinct types based on their composition and performance attributes. The designation system from ISO 14526-1 is used to identify types by their filler and reinforcement materials such as:

• Wood flour (WD) and mineral dust (MD)
• Low filler (LF) and mineral dust (MD)
• Glass fiber (GF), glass granulate (GG), or short fibers (SC)
• Steel strand (SS) or phenolic fibers (PF)

This classification facilitates clear specification and interchangeability within industry sectors.

Testing and Compliance

Testing methodologies align with ISO 14526-2 and are critical for evaluating compliance. Compression-moulding and injection-moulding methods are both addressed, recognizing their impact on material properties. Values from sample sets guide acceptance criteria, with permissible variations clearly stated.

Applications

Phenolic powder moulding compounds standardized by SIST EN ISO 14526-3:2000 are widely used in applications that demand:

• High mechanical strength and impact resistance: electrical insulators, automotive parts, and industrial components exposed to mechanical stress.
• Thermal stability: components in electrical devices, heating elements, and durability-critical moulded parts.
• Electrical insulation: switchgear, circuit breakers, and connectors requiring reliable dielectric properties.
• Flame retardancy: safety-critical applications adhering to stringent fire performance criteria.

Standardization ensures manufacturers and end-users can specify materials with predictable, verifiable performance, supporting quality assurance and regulatory compliance.

Related Standards

• ISO 14526-1:1999 – Designation system and basis for specifications of phenolic powder moulding compounds.
• ISO 14526-2:1999 – Preparation of test specimens and determination of properties for PF-PMCs.
• ISO 472:1999 – Plastics vocabulary providing essential terminology.
• ISO 800:1992 – Older phenolic moulding materials specification replaced in part by ISO 14526 parts.
• National standards such as BS 771:1992 and DIN 7708-2:1975 align or reference ISO 14526-3 for PF-PMC specifications.

Summary

SIST EN ISO 14526-3:2000 is a crucial standard for defining the requirements of selected phenolic powder moulding compounds used in the plastics industry. By detailing precise mechanical, thermal, electrical, and other property metrics, it enables consistent quality, supports extensive industrial applications, and harmonizes international material specifications. Manufacturers, engineers, and quality assurance professionals rely on this standard to ensure the performance, reliability, and safety of phenolic moulded products.

Standards Content (Sample)

SLOVENSKI STANDARD
01-december-2000
Polimerni materiali - Fenolne praškaste zmesi za oblikovanje (PF-PMCs) - 3. del:
Zahteve za izbrane zmesi za oblikovanje (ISO 14526-3:1999)
Plastics - Phenolic powder moulding compounds (PF-PMCs) - Part 3: Requirements for
selected moulding compounds (ISO 14526-3:1999)
Kunststoffe - Rieselfähige Phenol-Formmassen (PF-PMC) - Teil 3: Anforderungen an
ausgewählte Formmassen (ISO 14526-3:1999)
Plastiques - Poudres a mouler phénoliques (PF-PMC) - Partie 3: Exigences relatives a
certaines poudres a mouler (ISO 14526-3:1999)
Ta slovenski standard je istoveten z: EN ISO 14526-3:1999
ICS:
83.080.10 Duromeri Thermosetting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 14526-3
First edition
1999-11-15
Plastics — Phenolic powder moulding
compounds (PF-PMCs) —
Part 3:
Requirements for selected moulding
compounds
Plastiques — Poudres à mouler phénoliques (PF-PMC) —
Partie 3: Exigences relatives à certaines poudres à mouler
Reference number
ISO 14526-3:1999(E)
�
©
ISO 1999
ISO 14526-3:1999(E)
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ii © ISO 1999 – All rights reserved

ISO 14526-3:1999(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3.
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.
Attention is drawn to the possibility that some of the elements of this part of ISO 14526 may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights.
International Standard ISO 14526-3 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee
SC 12, Thermosetting materials.
After a transition period of, at the most, four years, the three parts of ISO 14526 (see below) will replace
ISO 800:1992, of which they constitute a technical revision.
ISO 14526 consists of the following parts, under the general title Plastics — Phenolic powder moulding compounds
(PF-PMCs):
� Part 1: Designation system and basis for specifications
� Part 2: Preparation of test specimens and determination of properties
� Part 3: Requirements for selected moulding compounds
Annex A of this part of ISO 14526 is for information only.
© ISO 1999 – All rights reserved iii

INTERNATIONAL STANDARD ISO 14526-3:1999(E)
Plastics — Phenolic powder moulding compounds (PF-PMCs) —
Part 3:
Requirements for selected moulding compounds
1 Scope
This part of ISO 14526 specifies the requirements for the physical and chemical properties of phenolic powder
moulding compounds (PF-PMCs) and compression- or injection-moulded test specimens produced from them.
It is limited to those powder moulding compounds whose composition and properties are significantly different. It is
further limited to those moulding compounds which are of general technical and/or economic importance.
The properties which are used to characterize the moulding compounds, the test methods and the test conditions
are selected from those given in ISO 14526-2.
The moulding compounds are divided into types according to their composition and properties. The various types
are designated using the designation system defined in ISO 14526-1.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of
this part of ISO 14526. For dated references, subsequent amendments to, or revisions of, any of these publications
do not apply. However, parties to agreements based on this part of ISO 14526 are encouraged to investigate the
possibility of applying the most recent editions of the normative documents indicated below. For undated
references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain
registers of currently valid International Standards.
ISO 472:1999, Plastics — Vocabulary.
ISO 800:1992, Plastics — Phenolic moulding materials — Specification.
ISO 14526-1:1999, Plastics — Phenolic powder moulding compounds (PF-PMCs) — Part 1: Designation system
and basis for specifications.
ISO 14526-2:1999, Plastics — Phenolic powder moulding compounds (PF-PMCs) — Part 2: Preparation of test
specimens and determination of properties.
3 Terms and definitions
For the purposes of this part of ISO 14526, the terms and definitions given in ISO 472, ISO 14526-1 and
ISO 14526-2 apply.
© ISO 1999 – All rights reserved 1

ISO 14526-3:1999(E)
4 Requirements
4.1 Property values
In order for a phenolic powder moulding compound to be considered as complying with this part of ISO 14526, it
shall meet the requirements given in the appropriate table (Table 1, 2 or 3).
Tables 1, 2 and 3 give the mean value obtained for the set of test specimens used to determine a particular
property. Individual values of properties 2.1, 2.2, 2.3 and 2.4 shall be within 10 % of the mean value, and indivi
...