BS/EN 13206-2017 pdf download.Plastics-Thermoplastic covering films for use in agriculture and horticulture.
8.9.3 Procedure
Expose the specimens according to 8.9.2 during the minimum duration of exposure specified in Table 2. corresponding to the class of durability of the film.
After the exposure, determine the tensile strain at break according to EN ISO 527-1 and EN ISO 527-3, using five type 2 test pieces, 10 mm wIde, 150 mm long, taken longitudinally in the film (MD), at a test speed of 500 mm/mm.
8.9.4 Calculation and expression of results
Calculate the arithmetic mean value of the five measurements performed on the test pieces cut from the exposed specimens and the arithmetic mean value of the five measurements performed on the test pieces cut from the unexposed specimens in longitudinal direction (MD) (see 8.3). Compare these two values.
The test is considered successful when the value calculated for specimens exposed to artificial weathering is equal or greater than 50 % of the value calculated for unexposed specimens.
8.10 Determination of the chlorine content of used films
The chlorine content of used films shall be determined in accordance with Annex C.
Alternative methods may be used if there is an agreement between the manufacturer and the customer.
For example, the chlorine content may be determined by X-ray fluorescence method according to
Annex E.
In case of dispute, the method as specified in Annex C shall be used.
8.11 Determination of the sulfur content of used films
The sulfur content of used films shall be determined in accordance with Annex D.
Alternative methods may be used if there is an agreement between the manufacturer and the customer. For example, the sulfur content may be determined by ultraviolet fluorescence method or by coulometry according to Annex F, or by X-ray fluorescence method according to Annex E.
In case of dispute, the method as specified in Annex D shall be used.
8.12 Determination of the roll/sheet length
The roll or sheet length shall be greater or equal to the nominal length of the roll or the sheet.
These control procedures are recommended in cases where there is uncertainty regarding the length of a roll or for survey testing. They are not recommended for goods acceptance inspections.
The inspection shall be carried out on a film roll that is complete and in its original packaging.
9 Film acceptance, storage and handling
9.1 Acceptance
Carefully examine the rolls or sheets upon delivery in order to rind any apparent damage or anomalies. If a defect is found, take the necessary actions for the case. Whenever possible, it is recommended to take a photograph of the damage.
The rolls and sheets shall be carried, not dragged over the ground or any other surface.
9.2 Storage and handling of rolls
Keep the rolls in their original packaging and store them protected from direct exposure to sunlight and temperature source and rain.
For greenhouse covering films, the duration of storage by the end-user shall be contractually limited to less than three months.
It is recommended that rolls delivered with a cardboard core be stored in a dry location. Handling should be performed horizontally.
10 Designation
The designation of the film shall include the following information:
a) use of the film: COVERING FILM with the type according to Table 1;
b) reference to this European Standard: EN 13206;
c) nominal width of the film, in millimetres (mm);
d) nominal thickness of the film, in micrometres (rim) if required;
e) class of durability according to Table 2.
f) manufacturer’s trade mark;
g) manufacturer’s information (the production period, year and month, in figures).
All these information have to be put on the accompanying label.
EXAMPLE COVERING FILM NTh EN 13206 5000 150 A AnyCo 2016—06.BS/EN 13206-2017 pdf download.