Gummi- och plastindustri

Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 10 aug 2020
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This part of ISO 16486 specifies the requirements of fitness for purpose of the unplasticized polyamide (PA-U) piping system, intended to be buried and used for the supply of gaseous fuels. It also specifies the definitions of electrofusion and butt fusion joints.

This part of ISO 16486 specifies the method of preparation of test piece joints and the tests to be carried out on these joints for assessing the fitness for purpose of the system under normal and extreme conditions. It also specifies the test parameters for the test methods to which it refers.

ISO 16486 is applicable to PA-U piping systems the components of which are connected by fusion jointing and/or mechanical jointing.

In conjunction with the other parts of ISO 16486, it is applicable to PA-U fittings, their joints and to joints with components of PA-U.

Kommittébeteckning: SIS/TK 254 (Järnväg, tunnelbana och spårväg)
Källa: ISO
Svarsdatum: den 14 aug 2020
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This part of ISO 12856 specifies general requirements of polymeric composite railway sleepers. It is applicable to the sleepers, bearers and transoms to be installed in all tracks (both heavy and urban rail) with or without ballast.

Kommittébeteckning: SIS/TK 254 (Järnväg, tunnelbana och spårväg)
Källa: ISO
Svarsdatum: den 19 aug 2020
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This part of ISO 12856 specifies the characteristics of polymeric composite and reinforced polymeric composite materials in the manufacture of polymeric composite railway sleepers. It is applicable to the sleepers, bearers and transoms to be installed in all tracks (both heavy and urban rail) with or without ballast.

Ämnesområden: Plast: allmänt
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: ISO
Svarsdatum: den 20 aug 2020
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This international standard specifies a method of determining the mass fraction of a polypropylene homopolymer of copolymer which is soluble in xylene at 25°C.

Other materials with solubilities similar to that of the xylene-soluble fraction, such as additives, may interfere with the determination.

This international standard included two methods which are "reference method (method 1)"and "automated instrument method (method 2)", The "reference method" is used to calibrate the method used for the determination of the xylene-soluble matter in polypropylene.

The "automated instrument method" is a method which can be used for the determination if it is calibrated using the reference method described in clause 4 provided it shows a certain permissible repeatability.

Ämnesområden: Termoplastmaterial
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: ISO
Svarsdatum: den 20 aug 2020
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This document specifies a method for the determination of content of magnesium (Mg), aluminium (Al), calcium (Ca), zinc (Zn), chromium (Cr), and titanium (Ti) in polyethylene (PE) and polypropylene (PP) by inductively coupled plasma optical emission spectrometry (ICP-OES).

NOTE This method specified in this document may be applied in determination of content higher than 0,5 mg/kg of iron (Fe), antimony (Sb), copper (Cu), lead (Pb), cadmium (Cd), etc. in PE and PP. However, there are no precision data on these elements so far. This method specified in this document is not recommended to be applied in the determination of arsenic (As) and mercury (Hg) in PE and PP due to their volatility.

This method is suitable for base polymers of PE, PP, PE/PP copolymer and their blending.

Ämnesområden: Termoplastmaterial
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: ISO
Svarsdatum: den 20 aug 2020
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This document specifies a relative method for the determination of polypropylene (PP) isotactic index by low-resolution pulsed nuclear magnetic resonance spectroscopy (LR-NMR).

This method provides for the identification and coding of types H propylene (PP-H) plastics according to ISO 19069-1.

This method is suitable for base polymers and is not applicable for mixtures.

NOTE The direct method for the determination of polypropylene isotactic index is specified in ISO 9113.

Ämnesområden: Film och ark
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 20 aug 2020
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This standard specifies the requirements and test methods for solid flat extruded sheets of polyethylene homopolymers (PE - HD) without fillers or reinforcing materials. This standard applies only to thicknesses of 0,5 mm to 40 mm. This standard also applies to PE - HD sheet in rolled form.

Ämnesområden: Termoplastmaterial
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 9 sep 2020
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This international standard specifies two categories of method for the determination of the vinyl acetate (VAC) content of Ethylene/vinyl acetate (EVAC) copolymer, for use in the designation of such copolymers in accordance with ISO 21301-1:2019.One category is referred to as "reference methods", the other as "test methods".

The "reference methods" are used to calibrate the method used for the determination of the vinyl acetate content of ethylene/vinyl acetate copolymers.

The "test methods" are other methods which can be used for the determination if they are calibrated using one of the reference methods described in clause 4 provided they show a certain permissible repeatability.

Ämnesområden: Armerad plast
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 9 sep 2020
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1.1 This part of ISO 527 specifies the test conditions for the determination of the tensile properties of unidirectional fibre-reinforced plastic composites, based upon the general principles given in Part 1.

1.2 The methods are used to investigate the tensile behaviour of the test specimens and for determining the tensile strength, tensile modulus, Poisson's ratios and other aspects of the tensile stress/strain relationship under the conditions defined.

1.3 The test method is suitable for all polymer matrix systems reinforced with unidirectional fibres and which meet the requirements, including failure mode, set out in this part of ISO 527.

The method is suitable for composites with either thermoplastic or thermosetting matrices, including preimpregnated materials (prepregs). The reinforcements covered include carbon fibres, glass fibres, aramid fibres and other similar fibres. The reinforcement geometries covered include unidirectional (i.e. completely aligned) fibres and rovings and unidirectional fabrics and tapes.

The method is not normally suitable for multidirectional materials composed of several unidirectional layers at different angles (see ISO 527 4).

1.4 The method is performed using one of two different types of test specimen, depending on the direction of the applied stress relative to the fibre direction (see Clause 6) and depending on the application of end tabs..

Ämnesområden: Armerad plast
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 9 sep 2020
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1.1 This part of ISO 527 specifies the test conditions for the determination of the tensile properties of isotropic and orthotropic fibre-reinforced plastic composites, based upon the general principles given in part 1.

Unidirectionally reinforced materials are covered by Part 5.

1.2 The methods are used to investigate the tensile behaviour of the test specimens and for determining the tensile strength, tensile modulus, Poisson's ratios and other aspects of the tensile stress/strain relationship under the defined conditions.

1.3 The test method is suitable for use with the following materials:

— fibre-reinforced thermosetting and thermoplastic composites incorporating non-unidirectional reinforcements such as mats, woven fabrics, woven rovings, chopped strands, combinations of such reinforcements, hybrids, rovings, short or milled fibres or preimpregnated materials (prepregs) (for directly injection-moulded specimens, see specimen 1A in ISO 527-2);

— combinations of the above with unidirectional reinforcements and multidirectional reinforced materials constructed from unidirectional layers, provided such laminates are symmetrical (for materials with completely, or mainly, unidirectional reinforcements, see ISO 527-5);

— finished products made from these materials.

The reinforcement fibres covered include glass fibres, carbon fibres, aramid fibres and other similar fibres.

1.4 The method is performed using specimens machined from a test panel made in accordance with ISO 1268 or by equivalent methods, or from finished and semi-finished products with suitable flat areas.

Ämnesområden: Plast: allmänt
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 9 sep 2020
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This document specifies a method, by measuring the amount of carbon dioxide evolved, for the determination of the degree of aerobic biodegradability of plastic materials, including those containing formulation additives. The test material is exposed in a synthetic medium under standardized laboratory conditions to an inoculum from activated sludge under aerobic, mesophilic conditions.

If an unadapted activated sludge is used as the inoculum, the test result can be used to assess the aerobic biodegradation processes which occur in a waste water treatment plant environment. If a mixed or pre-exposed inoculum is used, the method can be used to investigate the potential biodegradability of a test material.

The conditions used in this document do not necessarily correspond to the optimum conditions allowing maximum biodegradation to occur, but this test method is designed to measure the biodegradation of plastic materials and give an indication of their potential biodegradability.

The method enables the assessment of the biodegradation to be improved by calculating a carbon balance (optional, see Annex C).

The method applies to the following materials:

— natural and/or synthetic polymers, copolymers or mixtures thereof;

— plastic materials which contain additives such as plasticizers, colorants or other compounds;

— water-soluble polymers;

— materials which, under the test conditions, do not inhibit the microorganisms present in the inoculum. Inhibitory effects can be determined using an inhibition control or by another appropriate method (see, for example, ISO 8192[1]). If the test material is inhibitory to the inoculum, a lower test concentration, another inoculum or a pre-exposed inoculum can be used.

Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 9 sep 2020
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This part of ISO 13000 specifies the preparation of test specimens and gives the test methods applicable to semi-finished products of polytetrafluoroethylene (PTFE).

Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 9 sep 2020
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This part of ISO 13000 specifies the requirements and establishes a system of designation for processed unfilled polytetrafluoroethylene (PTFE) products, which may occur in several forms. The PTFE used to make the semi-finished product is described in ISO 20568-1 and, as provided in ISO 20568-1, may contain up to 1 % of a comonomer. The PTFE used to make the semi-finished product may be virgin, reprocessed or recycled resin. The addition of up to 1,5 % by mass of pigment or colorant is permitted. This part of ISO 13000 allows for five grades based on tensile strength and elongation at break. The semi-finished products can be as-processed (type P) or dimensionally stabilized (type S) and may also have specified electrical properties or other properties when they are required for an application.

NOTE References to other standards for semi-finished products made from polytetrafluoroethylene are listed in Annex A for information.

Ämnesområden: Plast: allmänt
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: CEN
Svarsdatum: den 9 sep 2020
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This document specifies test procedures for the acquisition and presentation of multipoint data on the following mechanical properties of plastics:

— dynamic modulus;

— tensile properties at constant test speed;

— ultimate stress and strain;

— tensile stress-strain curves;

— tensile creep;

— Charpy impact strength;

— puncture impact behaviour.

The test methods and test conditions apply predominantly to those plastics that can be injection- or compression-moulded or prepared as sheets of specified thickness from which specimens of the appropriate size can be machined.

Ämnesområden: Plast: allmänt
Kommittébeteckning: SIS/TK 156 (Plast)
Källa: ISO
Svarsdatum: den 9 sep 2020
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This document specifies test procedures for the acquisition and presentation of multipoint data which demonstrate the behaviour of plastics under the following environments:

— prolonged exposure to heat;

— liquid chemicals;

— environmental stress cracking under a constant tensile stress;

— artificial weathering.

The tests are listed in order of increasing severity of the environment. By testing under the least severe environments first, it is possible to make informed judgements regarding whether tests under more severe conditions are worthwhile.