EN 15534-1-2014 pdf download.Composites made from cellulose-based materials and thermoplastics (usually called wood-polymer composites (WPC) or natural fibre composites (NFC)) – Part 1: Test methods for characterisation of compounds and products.
After testing, the test specimens are examined visually to detect any presence of surface cracks and to measure the residual indentation.
7.1.2.1.2 Test method and test parameters
The resistance to impact shall be determined according to EN 477.
The mass of the striker, M with a smooth hemispherical striking surface of (25 ± 0,5) mm radius and the falling height, II, of the striker from the top surface of the test specimen shall be as specified in the reference standard.
The two rounded off steel supports of the apparatus shall be (200 ± 1) mm apart.
7.1 .2.1.3 Test specimens
The test specimens shall be (300 i 1) mm long the actual width and thickness of the profile.
The number of test specimens shall be specified in the reference standard.
If the profile may be used on both faces, the two faces of the test specimens shall be tested. If not, only the useable face of the test specimen shall be tested.
7.1.2.1.4 Conditioning
Condition the test specimens according to 5.2.
7.1.2.1.5 Procedure
Submit each specimen to the fo4lowing test at (23 ± 2) °C or (20 ± 2) C:
— set down the specimen on the supports with the extrusion direction of the test specimen perpendicular to the two rounded steel supports and the determined impact point positioned vertically to the striker:
— set up the falling height at the specified value in the reference standard:
— release the striker.
The impact position of the striker shall correspond to the weakest area of the test specimen. For hollow profiles, it is normally on the line located at midway between two ribs. See Figure 2 a).
Each longitudinal edge of the test specimen shall be tested. The impact position shall be determined in such a way that the circumference of the striker shall be flush with the outer edge of the specimen surface (useable face). See Figure 2 b).
Where the impact energy may be transmitted between adjacent profiles (e.g. profiles with tongue and groove profiles), two test specimens shall be connected, as defined by the manufacturer. The impact shall be carried out with the striker set up symmetrically to the joint.
When illuminated according to 6.1, inspect the impact area of each test specimen by means of a magnifying glass (e.g. factor 10).
The longest perceptible surface crack is measured to an accuracy of 0,5 mm (linear distance between end points of the crack).
The maximum depth of the residual indentation is measured with a suitable measuring instrument (e.g. a vernier calliper) to an accuracy of 0,1 mm. The measurements shall be carned out at the earliest 5 mm after the impact.
7.1.2.2 Profile cladding
7.1 .2,2.1 Non-cellular material profiles
7.1 .2.2.1 .1 Principle
A test specimen cut from a profile is subjected to a blow from a mass falling from a known height onto the exposed surface at midway between the supports, at a specified temperature.
After testing, the test specimens are examined visually to detect any presence of failures.
The energy levels are classified according to the results of a series of impact tests with a striker of specified mass.
7.1.2.2.1.2 Apparatus
The impact resistance test shall be carried out with an impact testing machine, as described in EN 477:1995, Clause 4, incorporating the following equipment:
a) a main frame, rigidly fixed in the vertical position;
7.1,2.2.1.3 Test specimens
Cut 10 specimens, (200 ± 10) mm long, from profiles selected at random from three different batches or one batch in case of factory production control.
In the case of profiles with webs, choose the impact point approximately at the midpoint between the supporting webs on the surface of the profile normally exposed, if applicable.
If the geometry of the profile does not allow the impact point to be determined clearly, the Impact point and the method of installation of the specimen shall be recorded,
If the exposed and unexposed faces of the profile are identical, mark each face and submit 10 specimens to the impact resistance test on the exposed face.
7.1.2.2.1.4 CondItioning
The specimens shall be conditioned according to 5.2 or, for the purpose of factory production control. according to 5.3.
7.1.2.2.1.5 Procedure
Submit each specimen to the foilowing test at (23 ± 2) C:
— set down the specimen on the supports with the extrusion direction of the test specimen perpendicular to the two rounded steel supports and the determined impact point positioned vertically to the striker;
— set up the falling height at (1 000 ± 5) mm from the top surface of the specimen:
— release the striker.
Examine the specimen and record the result as ‘Passed” or “Failed”. Failure occurs when the impacted surface of the specimen splits or cracks. An unbroken dent of the Impacted surface does not constitute failure.
In case of a profile with a top layer/coating (laminated foil, lacquer-coating, co-extruded layer), delamination of the top layer shall also be considered as a failure.
7.1.2.2.2 Cellular material profiles
For cellular material profiles, the test method specified In 7.1.2.2.1 applies with the following changes:
a) the test specimen shall be completely supported by a flat wooden plate (e.g. plywood of a minimum 32 mm thickness) .EN 15534-1-2014 pdf download.