Plastics - Compression moulding of test specimens of thermosetting materials (ISO 295:2004)

ISO 295:2004 establishes the general principles and lays down the procedure to prepare test specimens of heat- and pressure-moulded thermosetting material from different moulding compounds, specifies the details for test specimen preparation to be included with the test reports on properties and gives the general principles for the design of the mould intended for the preparation of the test specimens. The method applies to phenolic resin, aminoplastic, melamine/phenol, epoxy and unsaturated polyester-based thermosetting powder moulding compounds (PMCs). Special methods for preparing test specimens required because of the nature of certain moulding compounds, their flow properties or other variable factors, are not considered.

Kunststoffe - Pressen von Probekörpern aus duroplastischen Werkstoffen (ISO 295:2004)

Diese Internationale Norm
- legt die allgemeinen Prinzipien fest und schreibt das Verfahren für die Herstellung von Probekörpern aus Formmassen aus verschiedenen duroplastischen Werkstoffen durch Pressen unter Wärme und Druck vor;
- legt die Details der Probekörperherstellung fest, die in den Prüfberichten über die Eigenschaften anzugeben sind;
- führt die allgemeinen Prinzipien für die Ausführung der Form an, die für die Herstellung der Probekörper vorgesehen ist.
Die für die Herstellung von Probekörpern auf reproduzierbare Art und Weise erforderlichen Bedingungen, die zu vergleichbaren Ergebnissen führen werden, sind in der Internationalen Norm in Bezug auf die zu prüfenden Substanzen dargestellt.
Das Verfahren gilt für Phenolharz, Aminoplast, Melamin/Phenolharz, Epoxidharz und duroplastische rieselfähige Formmassen auf der Grundlage ungesättigter Polyester (PMCs). Unter Berücksichtigung der Natur von bestimmten Formmassen, ihres Fließvermögens oder anderer veränderlicher Einflussgrößen, könnte es erforderlich sein, Probekörper nach besonderen Verfahren herzustellen. Letztere sind üblicherweise Gegenstand einer Vereinbarung zwischen den interessierten Parteien und im Herstellungsbericht aufgezeichnet.

Plastiques - Moulage par compression des éprouvettes en matières thermodurcissables (ISO 295:2004)

L'ISO 295:2004 établit les principes généraux et consigne le mode opératoire à suivre pour la préparation d'éprouvettes de matériaux thermodurcissables moulés à chaud et sous pression provenant de différents mélanges à mouler, spécifie les détails de préparation des éprouvettes qui doivent figurer dans les rapports d'essai relatifs aux caractéristiques et fournit les principes généraux pour la conception du moule destiné à la préparation des éprouvettes.
La présente méthode s'applique aux mélanges à mouler en poudre (PMC) thermodurcissables à base de résines phénoliques, d'aminoplastes, de mélamine/phénol, d'époxydes et de polyesters non saturés. Compte tenu de la nature de certains mélanges à mouler, de leurs propriétés d'écoulement ou d'autres facteurs variables, il peut être nécessaire de préparer les éprouvettes selon des méthodes particulières. Celles-ci ne sont pas prises en considération dans la présente Norme internationale.

Polimerni materiali - Stiskanje duromernih preskušancev (ISO 295:2004)

General Information

Status
Published
Publication Date
31-Jan-2004
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
01-Feb-2004
Completion Date
01-Feb-2004

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SLOVENSKI STANDARD
SIST EN ISO 295:2004
01-oktober-2004
1DGRPHãþD
SIST EN ISO 295:2000
Polimerni materiali - Stiskanje duromernih preskušancev (ISO 295:2004)

Plastics - Compression moulding of test specimens of thermosetting materials (ISO

295:2004)
Kunststoffe - Pressen von Probekörpern aus duroplastischen Werkstoffen (ISO
295:2004)

Plastiques - Moulage par compression des éprouvettes en matieres thermodurcissables

(ISO 295:2004)
Ta slovenski standard je istoveten z: EN ISO 295:2004
ICS:
83.080.10 Duromeri Thermosetting materials
SIST EN ISO 295:2004 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 295:2004
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SIST EN ISO 295:2004
EUROPEAN STANDARD
EN ISO 295
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2004
ICS 83.080.10 Supersedes EN ISO 295:1998
English version
Plastics - Compression moulding of test specimens of
thermosetting materials (ISO 295:2004)

Plastiques - Moulage par compression des éprouvettes en Kunststoffe - Pressen von Probekörpern aus

matières thermodurcissables (ISO 295:2004) duroplastischen Werkstoffen (ISO 295:2004)

This European Standard was approved by CEN on 16 January 2004.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European

Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national

standards may be obtained on application to the Central Secretariat or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation

under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official

versions.

CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,

Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,

Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 295:2004: E

worldwide for CEN national Members.
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SIST EN ISO 295:2004
EN ISO 295:2004 (E)
CORRECTED 2004-03-10
Foreword

This document (EN ISO 295:2004) has been prepared by Technical Committee ISO/TC 61

"Plastics" in collaboration with Technical Committee CEN/TC 249 "Plastics", the secretariat of

which is held by IBN.

This European Standard shall be given the status of a national standard, either by publication of

an identical text or by endorsement, at the latest by August 2004, and conflicting national

standards shall be withdrawn at the latest by August 2004.
This document supersedes EN ISO 295:1998.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of

the following countries are bound to implement this European Standard: Austria, Belgium,

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,

Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,

Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
Endorsement notice
The text of ISO 295:2004 has been approved by CEN as EN ISO 295:2004 without any
modifications.
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SIST EN ISO 295:2004
INTERNATIONAL ISO
STANDARD 295
Third edition
2004-02-01
Plastics — Compression moulding of test
specimens of thermosetting materials
Plastiques — Moulage par compression des éprouvettes en matières
thermodurcissables
Reference number
ISO 295:2004(E)
ISO 2004
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SIST EN ISO 295:2004
ISO 295:2004(E)
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© ISO 2004

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electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or

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ii © ISO 2004 – All rights reserved
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SIST EN ISO 295:2004
ISO 295:2004(E)
Contents Page

Foreword............................................................................................................................................................ iv

1 Scope...................................................................................................................................................... 1

2 Normative references........................................................................................................................... 1

3 Terms and definitions........................................................................................................................... 2

4 Apparatus............................................................................................................................................... 3

5 Conditioning of material prior to moulding........................................................................................ 6

6 Preparation of the charge..................................................................................................................... 6

7 Moulding conditions............................................................................................................................. 7

7.1 General................................................................................................................................................... 7

7.2 Drying..................................................................................................................................................... 8

7.3 High-frequency preheating.................................................................................................................. 8

7.4 Pre-plastification................................................................................................................................... 8

7.5 Release agents...................................................................................................................................... 8

7.6 Breathing................................................................................................................................................ 8

8 Procedure............................................................................................................................................... 8

9 Precision................................................................................................................................................ 9

10 Moulding report..................................................................................................................................... 9

Annex A (informative) Marking of test specimens ........................................................................................ 11

Bibliography ..................................................................................................................................................... 12

© ISO 2004 – All rights reserved iii
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SIST EN ISO 295:2004
ISO 295:2004(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 2.

The main task of technical committees is to prepare International Standards. 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 document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 295 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting

materials.

This third edition cancels and replaces the second edition (ISO 295:1991), which has been technically revised.

iv © ISO 2004 – All rights reserved
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SIST EN ISO 295:2004
INTERNATIONAL STANDARD ISO 295:2004(E)
Plastics — Compression moulding of test specimens of
thermosetting materials
1 Scope
This International Standard

 establishes the general principles and lays down the procedure to prepare test specimens of heat- and

pressure-moulded thermosetting material from different moulding compounds;

 specifies the details for test specimen preparation to be included with the test reports on properties;

 gives the general principles for the design of the mould intended for the preparation of the test specimens.

The conditions required for preparing, in a reproducible manner, test specimens which will give comparable

results are discussed relative to the substance under consideration.

The method applies to phenolic resin, aminoplastic, melamine/phenol, epoxy and unsaturated-polyester based

thermosetting powder moulding compounds (PMCs). Due to the nature of certain moulding compounds, their

flow properties or other variable factors, it may be necessary to prepare the test specimens according to

special methods. The latter are normally in an agreement between the interested parties and noted in the

moulding report.
2 Normative references

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.
ISO 472:1999, Plastics — Vocabulary

ISO 1183:1987, Plastics — Methods for determining the density and relative density of non-cellular plastics

ISO 3167:2002, Plastics — Multipurpose test specimens

ISO 4287, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Terms, definitions

and surface texture parameters

ISO 14526-1, Plastics — Phenolic powder moulding compounds (PF-PMCs) — Part 1: Designation system

and basis for specifications

ISO 14526-2, Plastics — Phenolic powder moulding compounds (PF-PMCs) — Part 2: Preparation of test

specimens and determination of properties

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

selected moulding compounds

ISO 14527-1, Plastics — Urea-formaldehyde and urea/melamine-formaldehyde powder moulding compounds

(UF- and UF/MF-PMCs) — Part 1: Designation and basis for specifications
© ISO 2004 – All rights reserved 1
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SIST EN ISO 295:2004
ISO 295:2004(E)

ISO 14527-2, Plastics — Urea-formaldehyde and urea/melamine-formaldehyde powder moulding compounds

(UF- and UF/MF-PMCs) — Part 2: Preparation of test specimens and determination of properties

ISO 14527-3, Plastics — Urea-formaldehyde and urea/melamine-formaldehyde powder moulding compounds

(UF- and UF/MF-PMCs) — Part 3: Requirements for selected moulding compounds

ISO 14528-1, Plastics — Melamine-formaldehyde powder moulding compounds (MF-PMCs) — Part 1:

Designation system and basis for specifications

ISO 14528-2, Plastics — Melamine-formaldehyde powder moulding compounds (MF-PMCs) — Part 2:

Preparation of test specimens and determination of properties

ISO 14528-3, Plastics — Melamine-formaldehyde powder moulding compounds (MF-PMCs) — Part 3:

Requirements for selected moulding compounds

ISO 14529-1, Plastics — Melamine/phenolic powder moulding compounds (MP-PMCs) — Part 1: Designation

system and basis for specifications

ISO 14529-2, Plastics — Melamine/phenolic powder moulding compounds (MP-PMCs) — Part 2: Preparation

of test specimens and determination of properties

ISO 14529-3, Plastics — Melamine/phenolic powder moulding compounds (MP-PMCs) — Part 3:

Requirements for selected moulding compounds

ISO 14530-1, Plastics — Unsaturated-polyester powder moulding compounds (UP-PMCs) — Part 1:

Designation system and basis for specifications

ISO 14530-2, Plastics — Unsaturated-polyester powder moulding compounds (UP-PMCs) — Part 2:

Preparation of test specimens and determination of properties

ISO 14530-3, Plastics — Unsaturated-polyester powder moulding compounds (UP-PMCs) — Part 3:

Requirements for selected moulding compounds

ISO 15252-1, Plastics — Epoxy powder moulding compounds (EP-PMCs) — Part 1: Designation system and

basis for specifications

ISO 15252-2, Plastics — Epoxy powder moulding compounds (EP-PMCs) — Part 2: Preparation of test

specimens and determination of properties

ISO 15252-3, Plastics — Epoxy powder moulding compounds (EP-PMCs) — Part 3: Requirements for

selected moulding compounds
3 Terms and definitions

For the purposes of this document, the terms and definitions of ISO 472 and the following apply.

3.1
spatial temperature differences

differences in temperature existing simultaneously at various points inside the mould after the temperature

adjustment device has been set at a given temperature and after a permanent thermal equilibrium has been

reached
3.2
temporal temperature differences

differences in temperature that may occur at a single given point on the inside of the mould at various times

after the temperature adjustment device has been set at a given temperature and after a permanent thermal

equilibrium has been reached
2 © ISO 2004 – All rights reserved
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SIST EN ISO 295:2004
ISO 295:2004(E)
3.3
crosslinking time or cure time

time interval between the end of the mould-closing operation and the beginning of the mould-opening

operation

NOTE In practice, the cure time is generally counted as from the moment when the pressure re

...

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