ČSN EN ISO 177 (640244)

Plasty - Stanovení migrace změkčovadel

ČSN EN ISO 177 Plasty - Stanovení migrace změkčovadel
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Anotace obsahu normy

This document specifies a method for the determination of the tendency of plasticizers to migrate from plastics in which they are contained into other materials or other plastics when they are brought into close contact.
NOTE 1: The surfaces into which the migration can proceed can also consist of organic surface coatings, such as lacquers.
This test is suitable
a) for evaluating the tendency displayed by plastics, particularly in the form of films and sheets, to lose certain of their liquid constituents when they are brought into contact with materials that have an affinity for plasticizers, and
b) for studying the tendency to migrate of plasticizers contained in a resin or a series of resins, in one or more concentrations.
In case b), standard compounds are prepared on the basis of a well-characterized resin with well-defined ratios of plasticizer to resin.
NOTE 2: When the absorbent sheets themselves contain a substance capable of migrating, simultaneous migrations can occur from the test specimens into the absorbent sheets and vice versa.
The results may also be affected by the migration of other constituents of the plastic material (for example, oligomers) or by the loss of any volatile constituents other than plasticizers from the plastic material or the absorbent layer.

Označení ČSN EN ISO 177 (640244)
Katalogové číslo 502483
Cena 230 Kč230
Datum schválení 1. 8. 2017
Datum účinnosti 1. 9. 2017
Jazyk angličtina (obsahuje pouze anglický originál)
Počet stran 16 stran formátu A4
EAN kód 8596135024834
Tato norma nahradila ČSN ISO 177 (640244) z února 1994
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