1、BRITISH STANDARD BS EN 13206:2001 Covering thermoplastic films for use in agriculture and horticulture The European Standard EN 13206:2001 has the status of a British Standard ICs 65.040.30; 83.140.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Copyright European Committee
2、 for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-BSI BS EN 13206-ENGL 2001 1624669 0909410 970 BS EN 13206:2001 Amd. No, National foreword Date Comments This British Standard is the official English lang
3、uage version of EN 13206:2001. The UK participation in its preparation was entrusted to Technical Committee PRU75, Plastic and rubber films and sheets, which has the responsibility to: - - aid enquirers to understand the text; present to the responsible European committee any enquiries on the interp
4、retation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. - A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards wh
5、ich implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does
6、not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. This British Standard, having been prepared under the direction o
7、f the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 16 May 2001 O BSI 06-2001 ISBN O 580 37427 O Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 16, an i
8、nside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
9、 - - - STD-BSI BS EN L320b-ENGL 2OOL Lb24bb9 07074LL 807 EUROPEAN STANDARD EN 13206 NORME EUROPEENNE EUROPaSCHE NORM March 2001 ICs 65.040.30; 83.140.10 English version Covering thermoplastic films for use in agriculture and horticulture Films thermoplastiques de couverture pour utilisation en agric
10、ulture et horticulture Thermoplastische Abdeckfolien fr den Einsatz in der Landwirtschaft und im Gartenbau This European Standard was approved by CEN on 4 February 2001. CEN members are bound to comply with the CENICENELEC Internal Regulations which stipulate the conditions for giving this European
11、Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (English, Frenc
12、h, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmar
13、k, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION EUROPISCHES KOMITEE FR NORMUNG COMITE EUROPEEN DE NORMALISATION Management Centre: rue de Stassatt, 36 B-1050
14、 Brussels O 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13206:2001 E Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without lice
15、nse from IHS-,-,-STD-BSI BS EN 13206-ENGL 2001 W 1624bb9 0909432 743 Page 2 EN 13206:2001 Foreword This European Standard has been prepared by Technical Committee CENITC 249, Plastics, the Secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, e
16、ither by publication of an identical text or by endorsement, at the latest by September 2001, and conflicting national standards shall be withdrawn at the latest by September 2001. Annex A is informative. According to the CENKENELEC Internal Regulations, the national standards organizations of the f
17、ollowing countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. O BSI 05-2001 Copyright European Commi
18、ttee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- STDmBSI BS EN 13206-ENGL 2001 1624669 0909433 b8T = Page 3 EN 13206:2001 1 Scope This standard concerns transparent and diffusing plastic films based on
19、polyethylene andlor ethylene copolymers which are designed to be used as covers for permanent and temporary greenhouses for forcing and semi-forcing vegetable, fruit and flower crops. This standard is intended to establish the basic requirements for the physical and mechanical characteristics of var
20、ious types of film. From a detailed consideration of the different covering plastics films used in agriculture and horticulture in the European market, different types of film are considered, according to the application, independently of the colour: - normal film - thermic clear film - thermic diff
21、using film The range of thicknesses considered is from 50 pm up to more than 200 pm. 2 N or mat ive ref e ren ces This European Standard incorporates by dated or undated references, provisions from other publications. These normative references are cited at the appropriated places in the text and th
22、e publications are listed hereafter. For dated references subsequent amendments to or revisions of any of these pubblications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the pubblication referred to applies (incl
23、uding amendments). EN 2155-5, Aerospace series - Test methods for transparent materials for aircraft glazing - Determination of visible light transmission EN 2155-9, Aerospace series - Test methods for transparent materials for aircraft glazing - Determination of haze EN IS0 527-1, Plastics - Determ
24、ination of tensile properties - Part 7: General principles (IS0 527-1:1993 including Corr 1:1994) EN IS0 527-3, Plastics - Determination of tensile properties - Part 3: Test conditions for films and sheets (IS0 527-3: 1 995) EN IS0 4892-2, Plastics - Methods of exposure to laboratory light sources -
25、 Part 2: Xenon arc sources (IS0 4892-2:1994) IS0 4591, Plastics - Film and sheeting - Determination of average thickness of a sample and average thickness and yield of a roll by gravimetric techniques (gravimetric thickness) IS0 4592, Plastics - Film and sheeting - Determination of length and width
26、IS0 4593, Plastics - Film and sheeting - Determination of thickness by mechanical scanning IS0 7765-1:1988, Plastics film and sheeting - Determination of impact resistance by the free falling dart method - Part 1: Staircase methods O BSI 05-2001 Copyright European Committee for Standardization Provi
27、ded by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- - STDmBSI BS EN 33206-ENGL 2003 = 3624669 0909434 5Lb Page 4 EN 13206:2001 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 3.1 wi
28、dth total width of the film when laid flat, given in millimetres NOTE Films which are wider than 2 O00 mm are usually folded lenghtwise at least once before of the winding on a reel. These folds are retained even when the film is laid out flat, and this may affect test results. Therefore, a distinct
29、ion shall be made between the sample sheets taken from the folds (“fold” area) and sample sheets taken from areas which have not been folded (“flat” area). 3.2 nominal width width declared by the manufacturer in millimeters 3.3 thickness given in micrometers 3.4 nominal thickness thickness declared
30、by the manufacturer in micrometers 3.5 length of the roll largest dimension of the roil in mm 3.6 longitudinal direction of the roll (MD) direction parallel to the length of the roll corresponding to the extrusion direction 3.7 transverse direction of the roll (TD) direction parallel to the width (a
31、t right angles to the length) 4 Plastics materials Agricultural covering film in accordance with the EN Standard is usually manufacturec from: - low density polyethylene (PE-LD), linear low density polyethylene (PE-LLD) and their blends; - ethylene vinyl acetate copolymers (ENAC) and their blends wi
32、th PE-LD or PE-LLD; - ethylene butyl-acrylate copolymers (E/BA) and their blends with PE-LD or PE-LLD. O BSI 052001 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-BSI BS EN
33、23206-ENGL 2002 Lb24667 0709425 452 9 Type Normal film Thermic clear film Page 5 EN 13206:2001 Characteristics Use - good transparency - low greenhouse effect - good transparency Forcing and semiforcing crops As normal film, when greater IR 5 Types and ranges of use Thermic diffusing film The differ
34、ent types of film covered by this standard and their respective ranges of use are shown in Table I. - - high IR effectiveness - diffusing light - high IR effectiveness effectiveness is desired As normal film, when greater IR barrier and diffusing light is desired Table 1 - Characteristics and use of
35、 covering films Class of film N Duration (hours) 2 400 A B 6 Duration 2 1 700 2 3 200 The duration of a covering film is declared by the manufacturers and is determined testing the variation of its elongation at break after accelerated weathering (see 8.10). C D The film is classified as class N, A,
36、 B, C, D and E (see Table 2), depending on the time required to decrease the value of its tensile strain at break to the 50% of the initial value. 2 4 600 2 6 O00 E I 2 7 300 I 7 Properties of the covering films Table 3, 4 and 5 indicate the properties of normal, thermic clear and thermic diffusing
37、films, respectively. 8 Test methods 8.1 Appearance The free edges of the roll shall be sealed with adhesive tape or by some other similar means, in order to prevent its unwinding. The edges shall be properly in line and there shall be sufficient tension to prevent the layer of the I roll from transv
38、erse slipping when it is handled (this shall be done horizontally). , O BSI 052001 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-BSI BS EN L320b-ENGL 2OOL Lb24669 0909416 3
39、99 H Page 6 EN 13206:2001 The film shall be homogeneous and free from visible defects which may affect the functionality of the film (check by unrolling at least 2 m of the film and examining it against the light at arms length). 8.2 Thickness The thickness of the single points of the film and avera
40、ge thickness of the film shall be determined in accordance with IS0 4591 and IS0 4593 respectively. 8.3 Width The width of the film shall be determined in accordance with IS0 4592. 8.4 Determination of tensile properties The tensile properties shall be determined according to EN IS0 527-3 using a te
41、st specimen type 2, 10 mm wide with a test speed of 500 mm/min. Test procedure shall refer to EN IS0 527-1. 8.5 Determination of impact resistance The determination of impact resistance (Dart drop test) shall be determined in accordance with IS0 7765-1:1998 method A. 8.6 Elongation under a steady lo
42、ad (creep test) 8.6.1 Principle To measure the elongation of a film under a stated load after a fixed time in a vertical static position. 8.6.2 Apparatus Two grips hold the test specimen. A weight is hung to the lower (free) grip to provide a steady stress in the specimen. The upper grip is clamped
43、to a fixed support as in Figure I. O BSI 052001 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STD-BSI BS EN 13206-ENGL 2001 Lb24669 0909427 225 W Page 7 EN 13206:2001 1 Fixed s
44、upport 2 Grips 3 Test specimen 4 Weight Figure I - Typical arrangement O BSI O52001 Copyright European Committee for Standardization Provided by IHS under license with CENNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-STDOBSI BS EN 33206-ENGL 2001 Lb24bb9 0909438
45、Lb1 H Page 8 EN 13206:2001 8.6.3 Operative conditions The 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 mm. Test conditions: - test temperature: 23 “C f 2 O
46、C; - load to be applied: 4 Mpa; - duration of the test: 100 h. 8.6.4 Procedure Place 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 of the specimen, and adjust the test
47、 weight to this value (e.g. by adding or removing lead shot to the weight). Carefully hang the system, grips - specimen - weight, to the fixed support, avoiding jerks and shocks. Note measurement. During the test the apparatus shall not be subjected to vibration or shocks which may influence the fin
48、al 8.6.5 Results The results are expressed as the strain of the sample as a percentage of the original length. A=- - duration of spraying 18 min f 0,5 min, dry interval between spraying: 102 min f 0,5 min - Black standard temperature (65 f 3) “C - Relative humidity (65 f 5) % - The backing of the fi
49、lm used shall be a stainless steel plate 8.1 0.4 Procedure A sample of film is irradiated according to 8.10.3 for the time corresponding to the class of the Table 2. After irradiation, the tensile strain at break shall be determined according to EN IS0 527-3, using test specimens type 2, 15 mm wide, taken longitudinally (MD) with a speed of 500 mmlmin. Test
