ISO 4665-2016 pdf free download

ISO 4665-2016 pdf free download.Rubber, vulcanized or thermoplastic — Resistance to weathering
Caoutchouc vulcanisé ou therinoplastique — Résistance aux in tern péries.
file test piece
portion of the material to be tested which is stored tinder conditions in which it is stable and is used for comparison between the exposed and the original state
3.3
masked area
portion of the exposed test piece which is protected from light exposure by masking
3.4
weathering reference material
reference material whose weathering degradation properties are well documented and repeatable when exposed to identical conditions
3.5
exposure stage
interval of exposure between determinations of change in properties, expressed as time or radiant exposure
4 Principle
Test pieces are exposed to natural or artificial weathering and the resulting changes In colour, appearance, and selected physical properties are determined.
5 Exposure to direct weathering, to weathering using glass-filtered daylight or to intensified weathering by daylight using Fresnel mirrors
Carry out the exposure in accordance with the relevant method of ISO 877, with the following additions and modifications:
— For tests under strain, prepare the test pieces and place them under strain in accordance with
Iso 1431-1.
— It is recommended that one or more of the weathering reference materials described in Annex A be
used as a control, the material selected depending on the type of rubber compound under test. The
effects of natural weathering on these materials in a range of climates are detailed in Reference [11
and Reference 121.
— Condition the test pieces in accordance with ISO 23529.
6 Exposure to laboratory light sources
Carry out the exposure in accordance with ISO 4892-1 and, as relevant, ISO 4892-2, ISO 4892-3. or Iso 4892-4, with the following additions and modifications:
For tests under strain, prepare the test pieces and place them under strain in accordance with ISO 1431-1.
It is recommended that one or more of the weathering reference materials described in Annex A be used as a control, the material selected depending on the type of rubber compound under test. The effects of natural weathering on these materials in a range of climates are detailed in Reference LII and Reference L1.
Condition the test pieces in accordance with ISO 23529.
NOTE 1 The general guidance on weathering of plastics given in ISO 4892-1 is applicable to rubbers.
NOTE 2 In general, an open-flame carbon-arc lamp is not recommended because It is not representative of
sunlight.
7 Changes in colour
7.1 Apparatus
7.1.1 Instrumental assessment
Use a colour or colour change apparatus meeting the requirements described in ISO 183 14-1.
7.1.2 VIsual assessment
Use the grey scale in accordance with ISO 1O5-A02.
7.2 Test piece
The test piece shall be in any torm which allows sufficient flat area ror the determination or colour cnange.
NOTE It is convenient to use a test piece required for the determination of change in physical properties.ISO 4665-2016 pdf free download.