SIST EN 13206:2002

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Prekrivni plastomerni filmi za uporabo v kmetijstvu in vrtnarstvuThermoplastische Abdeckfolien für den Einsatz in der Landwirtschaft und im GartenbauFilms thermoplastiques de couverture pour utilisation en agriculture et horticultureCovering thermoplastic films for use in agriculture and horticulture83.140.10Filmi in folijeFilms and sheets65.040.30Rastlinjaki in druge napraveGreenhouses and other installationsICS:Ta slovenski standard je istoveten z:EN 13206:2001SIST EN 13206:2002en01-februar-2002SIST EN 13206:2002SLOVENSKI
STANDARD



SIST EN 13206:2002



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13206March 2001ICS 65.040.30; 83.140.10English versionCovering thermoplastic films for use in agriculture andhorticultureFilms thermoplastiques de couverture pour utilisation enagriculture et horticultureThermoplastische Abdeckfolien für den Einsatz in derLandwirtschaft und im GartenbauThis European Standard was approved by CEN on 4 February 2001.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2001 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13206:2001 ESIST EN 13206:2002



Page 2EN 13206:2001ForewordThis European Standard has been prepared by Technical Committee CEN/TC 249 "Plastics", thesecretariat of which is held by IBN.This European Standard shall be given the status of a national standard, either by publication ofan identical text or by endorsement, at the latest by September 2001, and conflicting nationalstandards shall be withdrawn at the latest by September 2001.Annex A is informative.According to the CEN/CENELEC Internal Regulations, the national standards organizations of thefollowing countries are bound to implement this European Standard: Austria, Belgium, CzechRepublic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.SIST EN 13206:2002



Page 3EN 13206:20011ScopeThis standard concerns transparent and diffusing plastic films based on polyethylene and/orethylene copolymers which are designed to be used as covers for permanent and temporarygreenhouses for forcing and semi-forcing vegetable, fruit and flower crops.This standard is intended to establish the basic requirements for the physical and mechanicalcharacteristics of various types of film.From a detailed consideration of the different covering plastics films used in agriculture andhorticulture in the European market, different types of film are considered, according to theapplication, independently of the colour:- normal film- thermic clear film- thermic diffusing filmThe range of thicknesses considered is from 50 m up to more than 200 m.2Normative referencesThis European Standard incorporates by dated or undated references, provisions from otherpublications. These normative references are cited at the appropriated places in the text and thepublications are listed hereafter. For dated references subsequent amendments to or revisions ofany of these pubblications apply to this European Standard only when incorporated in it byamendment or revision. For undated references the latest edition of the pubblication referred toapplies (including amendments).EN 2155-5Aerospace series - Test methods for transparent materials for aircraftglazing - Determination of visible light transmissionEN 2155-9Aerospace series - Test methods for transparent materials for aircraftglazing - Determination of hazeEN ISO 527-1Plastics - Determination of tensile properties - Part 1: General principles(ISO 527-1:1993 including Corr 1:1994)EN ISO 527-3Plastics - Determination of tensile properties - Part 3: Test conditions forfilms and sheets (ISO 527-3:1995)EN ISO 4892-2Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources (ISO 4892-2:1994)ISO 4591Plastics - Film and sheeting - Determination of average thickness of asample and average thickness and yield of a roll by gravimetric techniques(gravimetric thickness)ISO 4592Plastics - Film and sheeting - Determination of length and widthISO 4593Plastics - Film and sheeting - Determination of thickness by mechanicalscanningISO 7765-1:1988Plastics film and sheeting - Determination of impact resistance by the freefalling dart method - Part 1: Staircase methodsSIST EN 13206:2002



Page 4EN 13206:20013Terms and definitionsFor the purposes of this standard, the following terms and definitions apply.3.1widthtotal width of the film when laid flat, given in millimetresNOTEFilms which are wider than 2000 mm are usually folded lenghtwise at least once before ofthe winding on a reel. These folds are retained even when the film is laid out flat, and this mayaffect test results. Therefore, a distinction shall be made between the sample sheets taken fromthe folds ("fold" area) and sample sheets taken from areas which have not been folded ("flat"area).3.2nominal widthwidth declared by the manufacturer in millimeters3.3thicknessgiven in micrometers3.4nominal thicknessthickness declared by the manufacturer in micrometers3.5length of the rollthe largest dimension of the roll in mm3.6longitudinal direction of the roll (MD)direction parallel to the length of the roll corresponding to the extrusion direction3.7transverse direction of the roll (TD)direction parallel to the width (at right angles to the length)4Plastics materialsAgricultural covering film in accordance with the EN standard are usually manufactured from:- low density polyethylene (PE-LD), linear low density polyethylene (PE-LLD) and their blends- ethylene vinyl acetate copolymers (E/VAC) and their blends with PE-LD or PE-LLD- ethylene butyl-acrylate copolymers (E/BA) and their blends with PE-LD or PE-LLD.5Types and ranges of useThe different types of film covered by this standard and their respective ranges of use are shownin Table 1.SIST EN 13206:2002



Page 5EN 13206:2001Table 1 - Characteristics and use of covering filmsTypeCharacteristicsUseNormal film- good transparency- low greenhouse effectForcing and semiforcing cropsThermic clear film- good transparency- high IR effectivenessAs normal film, when greater IReffectiveness is desiredThermic diffusing film- diffusing light- high IR effectivenessAs normal film, when greater IRbarrier and diffusing light is desired6DurationThe duration of a covering film is declared by the manufacturers and is determined testing thevariation of its elongation at break after accelerated weathering (see 8.10).The film is classified as class N, A, B, C, D and E (see Table 2), depending on the time required todecrease the value of its tensile strain at break to the 50% of the initial value.Table 2 - Covering films - Classification on the basis of the artificial weathering durationClass of filmDuration(hours)N 400A 1700B 3200C 4600D 6000E 73007Properties of the covering filmsTable 3, 4 and 5 indicate the properties of normal, thermic clear and thermic diffusing films,respectively.8Test methods8.1AppearanceThe free edges of the roll shall be sealed with adhesive tape or by some other similar means, inorder to prevent its unwinding.The edges shall be properly in line and there shall be sufficient tension to prevent the layer of theroll from transverse slipping when it is handled (this shall be done horizontally).The film shall be homogeneous and free from visible defects which may affect the functionality ofthe film (check by unrolling at least 2 m of the film and examining it against the light at armslength"8.2ThicknessThe thickness of the single points of the film and average thickness of the film shall be determinedin accordance with ISO 4591 and ISO 4593 respectively.SIST EN 13206:2002



Page 6EN 13206:20018.3WidthThe width of the film shall be determined in accordance with ISO 4592.8.4Determination of tensile propertiesThe tensile properties shall be determined according to EN ISO 527-3 using a test specimentype 2,
10 mm wide with a test speed of 500 mm/min. Test procedure shall refer to EN ISO 527-1.8.5Determination of impact resistanceThe determination of impact resistance (Dart drop test) shall be determined in accordance withISO 7765-1:1998 method A.8.6Elongation under a steady load (creep test)8.6.1PrincipleTo measure the elongation of a film under a stated load after a fixed time in a vertical staticposition.8.6.2ApparatusTwo grips hold the test specimen.A weight is hung to the lower (free) grip to provide a steady stress in the specimen. The upper gripis clamped to a fixed support as in fig. 1.SIST EN 13206:2002



Page 7EN 13206:2001Key1 Fixed support2 Grips3 Test specimen4 WeightFigure 1 - Typical arrangementSIST EN 13206:2002



Page 8EN 13206:20018.6.3Operative conditionsThe test is done on 3 specimens cut from the film in the machine direction (MD).Dimension of the specimen- width: 10 mm- total length: 140 mm- gauge length defined between two marks: 100 mmTest conditions:- test temperature: 23 °C
2 °C- load to be applied: 4 MPa- duration of the test: 100 h8.6.4ProcedurePlace the test specimen on which the gauge length of 100 mm has been marked, in the grips.Calculate the weight which is needed for the test with reference to the minimum cross section ofthe specimen, and adjust the test weight to this value (e.g. by adding or removing lead shot to theweight). Carefully hang the s
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