Plasty

Oblast zaměření: Plasty
Komise : CEN/TC 249 (Plastics)
Původce: CEN
K připomínkám do: 1.04.2018
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1.1     This part of ISO 21306 establishes a system of designation for unplasticized PVC thermoplastic material which may be used as the basis for specifications.

1.2     The types of PVC-U plastics are differentiated from each other by a classification system based on appropriate levels of the designatory properties

a)     Vicat softening temperature

b)    impact strength (Charpy notched)

c)     modulus of elasticity

and on information about basic polymer parameters, intended application and/or method of processing, important properties, additives, colorants, fillers and reinforcing materials.

1.3     This part of ISO 21306 is applicable to all unplasticized compositions of homopolymers and copolymers that contain at least 50 % (m/m) of vinyl chloride. It is also applicable to compositions containing chlorinated poly(vinyl chloride) and to compositions containing blends of one or more of the above-mentioned polymers, provided that the total amount of these polymers represents at least 50 % (m/m) of the polymer content of the composition.

It applies to materials ready for normal use in the form of powder, granules or pellets and to materials unmodified or modified by colorants, additives, fillers, etc.

This part of ISO 21306 does not apply to cellular plastics.

1.4     It is not intended to imply that materials having the same designation give necessarily the same performance. This part of ISO 21306 does not provide engineering data, performance data or data on processing conditions which may be required to specify a material for a particular application and/or method or processing.

If such additional properties are required, they may be determined in accordance with the test methods specified in part 2 of this International Standard, if suitable.

1.5     In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements may be given in data block 5 (see 4.1).

Oblast zaměření: Plasty
Komise : CEN/TC 249 (Plastic)
Původce: CEN
K připomínkám do: 1.04.2018
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This part of ISO 21306 specifies procedures and conditions for the preparation of test specimens of PVC-U materials in a specified state, and methods for measuring their properties. Any property listed in this part and referred to in combination with part 1 shall be determined by the method referred to in this part.

No figures are quoted for these properties. Those required for the designation of PVC-U thermoplastics are given in part 1 of this International Standard. All properties shall be determined by the appropriate methods referred to in this part of ISO 21306 and values obtained shall be presented as laid down in ISO 10350‑1.

The values determined in accordance with this part of ISO 21306 will not necessarily be identical to those obtained using specimens of different dimensions and/or prepared by different procedures. The values obtained for the properties of a moulding depend on the moulding compound, the shape, the test method and the state of anisotropy. The last-mentioned depends on the gating of the mould and the moulding conditions, for example temperature, pressure and injection rate. Any subsequent treatment must also be considered, for example conditioning or annealing.

The thermal history and the internal stresses of the specimens may strongly influence the thermal and mechanical properties and the resistance to environmental stress cracking, but exert less effect on the electrical properties, which depend mainly on the chemical composition of the moulding compound.

In order to obtain reproducible test results, the following two conditions shall be met:

a)     use test specimens with the specified dimensions and conditioning;

b)    use test procedures as specified in this part of ISO 21306.

Oblast zaměření: Plasty
Komise : CEN/TC 249 (Plastic)
Původce: CEN
K připomínkám do: 3.04.2018
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1.1     This part of ISO 19062 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of ABS moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given here.

1.2     Procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize ABS moulding and extrusion materials are listed.

1.3     The properties have been selected from the general test methods in ISO 10350‑1. Other test methods in wide use for, or of particular significance to, these moulding and extrusion materials are also included in this part of ISO 19062, as are the designatory properties specified in Part 1.

1.4     In order to obtain reproducible and comparable test results, it is necessary to use the methods of specimen preparation and conditioning, the specimen dimensions and the test procedures specified herein. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.

Oblast zaměření: Plasty
Komise : CEN/TC 249 (Plastic)
Původce: CEN
K připomínkám do: 3.04.2018
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1.1     This part of ISO 19065 specifies the methods of preparation of test specimens and the test methods to be used in determining the properties of acrylonitrile-styrene-acrylate (ASA), acrylonitrile-(ethylene-propylenediene)-styrene (AEPDS) and acrylonitrile-(chlorinated polyethylene)-styrene (ACS) moulding and extrusion materials. Requirements for handling test material and for conditioning both the test material before moulding and the specimens before testing are given here.

1.2     Procedures and conditions for the preparation of test specimens and procedures for measuring properties of the materials from which these specimens are made are given. Properties and test methods which are suitable and necessary to characterize ABA, AEPDS AND ACS moulding and extrusion materials are listed.

1.3     The properties have been selected from the general test methods in ISO 10350‑1. Other test methods in wide use for, or of particular significance to, these moulding and extrusion materials are also included in this part of ISO 19065, as are the designatory properties specified in Part 1.

1.4     In order to obtain reproducible and comparable test results, it is necessary to use the methods of specimen preparation and conditioning, the specimen dimensions and the test procedures specified herein. Values determined will not necessarily be identical to those obtained using specimens of different dimensions or prepared using different procedures.