ISO 2897:1976

Plastics — Designation of impact-resistant polystyrenes

Matières plastiques — Désignation des polystyrènes résistants au choc

General Information

• Status: Withdrawn
• Publication Date: 31-Dec-1975
• Withdrawal Date: 31-Dec-1975
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: ISO/TC 61 - Plastics
• Drafting Committee: ISO/TC 61 - Plastics
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 01-Jul-1991

Relations

• Revised: ISO 2897-2:1981 - Plastics — Impact-resistant polystyrenes — Part 2: Determination of properties
• Effective Date: 15-Apr-2008
• Revised: ISO 2897-1:1990 - Plastics — Impact-resistant polystyrene (SB) moulding and extrusion materials — Part 1: Designation
• Effective Date: 15-Apr-2008
• Revised: SIST ISO 2897-1:1996 - Plastics -- Impact-resistant polystyrene (SB) moulding and extrusion materials -- Part 1: Designation
• Effective Date: 12-May-2008

Standards Content (Sample)

INTERNATIONAL STANDARD 2897
INTERNATIONAL ORGANIZATION
FOR STANDARDIZATION *MEEnYHAPOilHAR OPïAHH3AUHR no CTAHnAPTH3AUHA.ORGANISATION INTERNATIONALE DE NORMALISATION
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Plastics - Designation of impact-resistant polystyrenes
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Matières plastiques - Désignation des polystyrènes résistants au choc
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First edition - 1976-01 -15
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UDC 678,746.22.001.3 : 539.41.1.5
Ref. No. IS0 2897-1976 (E)
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Descriptors : plastics, thermoplastic resins, polystyrene, moulding materials, designation, test specimens, tests, softening point, viscosity
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index, shock resistance, modulus of elasticity.
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Price based on 2 pages

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FOREWORD
IS0 (the International Organization for Standardization) is a worldwide federation
of national standards institutes (IS0 Member Bodies). The work of developing
International Standards is carried out through IS0 Technical Committees. Every
a subject for which a Technical Committee has been set
Member Body interested in
up 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.
Draft International Standards adopted by the Technical Committees are circulated
to the Member Bodies for approval before their acceptance as International
Standards by the IS0 Council.
International Standard IS0 2897 was drawn up by Technical Committee
ISO/TC 61, Plastics, and circulated to the Member Bodies in September 1972.
It has been approved by the Member Bodies of the following countries :
Austria Israel Sweden
Belgium Japan Switzerland
Brazil Netherlands Thailand
New Zealand Turkey
Canada
Poland United Kingdom
Czechoslovakia
of Portugal U.S.A.
Egypt, Arab Rep.
Germany Romania U .S.S. R .
Hungary South Africa, Rep. of
Spain
India
The Member Body of the following country expressed disapproval of the document
on technical grounds :
France
O International Organization for Standardization, 1976 e
Printed in Switzerland

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INTERNATIONAL STANDARD IS0 2897-1976 (E)
Plastics - Designation of impact-resistant polystyrenes
1 SCOPE AND FIELD OF APPLICATION ISO/R 11 33, Plastics - Determination of the melt flow rate
of thermoplastics.
1.1 This International Standard specifies a method of
IS0 1622, Plastics - Designation for polystyrene moulding
designation, and general requirements, for impact-resistant
and extrusion materials.
polystyrene moulding and extrusion materials; it is
intended to be the basis for a full specification to be IS0 2557, Plastics - Amorphous thermoplastic moulding
published later. materials - Preparation of test specimens with a defined
level of shrinkage.')
1.2 The types of impact-resistant polystyrene moulding
IS0 2561, Plastics - Determination of residual styrene
and extrusion materials are differentiated from one another
monomer in polystyrene by gas chromatography.
by appropriate levels of selected specific properties.
Impact-resistant polystyrene itself is described by general
characteristics selected for reference purposes.
3 DESIGNATION
1.3 These types are uncoloured or coloured materials
comprising polymers of styrene (possibly copolymerized
with small amounts of an alkylstyrene) modified with
3.1 Materials are codified as "SB" (to indicate polystyrene
butadiene-based rubber to obtain greater toughness,
modified with butadiene) and in terms of their individual
indicated by values of impact strength exceeding that for
combinations of range or "cell" values of softening point,
normal polystyrene as designated by IS0 1622. Lubricants,
melt flow, impact strength and modulus of elasticity; for
softeners, antioxidants and other additives may be present
example, 132(1)4, by reference to 4.2 means :
but are not further specified here.
1 - Vicat softening point < 80 OC;
1.4 Other properties may be necessary to specify materials
3 - melt flow index > 8,O to 16 9/10 min;
for particular purposes.
2(1) - lzod impact strength > 30 to 60 J/m (a Charpy
value is designated by 2(C));
2 REFERENCES
4 - modulus of elasticity > 2,5 X IO9 N/m2.
IS0 178, Plastics - Determination of flexural properties of
rigid plastics. Thus, this material would be designated "SB 132(1)4". (Not
every combination of range or "cell" number for each
ISO/R 179, Plastics - Determination of the Charpy impact
p
...