1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Plastics - Barrier films for agricultural and horticultural soil disinfection by fumigationPart 1: Specifications for barrier filmsBS EN 170981:2018National forewordThis British Standard is the UK implementation of EN 1
2、70981:2018.The UK participation in its preparation was entrusted to Technical Committee PRI/75, Plastics and rubber film and sheets.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisi
3、ons of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 95734 5ICS 83.140.10Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published
4、 under the authority of the Standards Policy and Strategy Committee on 31 January 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 170981:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 170981January 2018ICS 83.140.10EUROPEAN COMMITTEE FOR STANDARDIZAT
5、IONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN 170981:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersPlastics Barrier films for agricultura
6、l and horticultural soil disinfection by fumigation Part 1: Specifications for barrier filmsPlastiques Films barrire pour la dsinfection par fumigation des sols agricoles et horticoles Partie 1: Spcifications des films barrireKunststoffe Sperrschichtfolien zur Desinfektion durch Begasung von Landwir
7、tschafts und Gartenbaubden Teil 1: Spezifikationen fr SperrschichtfolienThis European Standard was approved by CEN on 20 November 2017.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national s
8、tandard without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the CENCENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in an
9、y other language made by translation under the responsibility of a CEN member into its own language and notified to the CENCENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republ
10、ic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.Eng
11、lish VersionEN 17098-1:2018 (E)European foreword 4Introduction .51 Scope .62 Normative references 63 Terms and definitions, and abbreviated terms 63.1 Terms and definitions . 63.2 Abbreviated terms . 74 Classification of films by service life 85 Permeability to fumigants 85.1 General . 85.2 Determin
12、ation of the film permeability 96 Requirements 96.1 General requirements . 96.2 Requirement for appearance .106.3 Optional characteristics .107 Test methods 117.1 Determination of the thickness .117.2 Determination of the width 117.3 Determination of the roll length .117.4 Determining tensile proper
13、ties .127.5 Determination of the weathering resistance (for class 2 films only) 127.5.1 Principle .127.5.2 Exposure method .127.5.3 Procedure 127.5.4 Calculation and expression of results .137.6 Determination of the peel strength 137.6.1 General.137.6.2 Principle .137.6.3 Apparatus 137.6.4 Specimens
14、 .137.6.5 Procedure 147.6.6 Expression of results .157.6.7 Precision.157.6.8 Test report 167.7 Determining impact resistance 167.7.1 General.167.7.2 Impact test on flat area 167.7.3 Impact test on fold area 167.8 Determining relative light transmission 177.8.1 Principle .177.8.2 Apparatus 177.8.3 Pr
15、ocedure 177.8.4 Expression of results .188 Roll acceptance, storage and handling .188.1 Delivery checking .188.2 Storage and handling of rolls .189 Installation instructions and conditions for use 1810 Disposal instructions and end of life of films 1911 Designation of barrier films 192Contents PageB
16、S EN 170981:2018EN 17098-1:2018 (E)12 Marking .2012.1 Marking of the film .2012.2 Marking on the packaging or label20Annex A (informative) Exposure to other light sources 21Annex B (informative) Determination of the puncture resistance 24Annex C (informative) Guidance for conditions for installation
17、, use and removal of barrier films 27Bibliography .28 ISO ISO pubdate year All rights reserved 3BS EN 170981:2018EN 17098-1:2018 (E)European forewordThis document (EN 170981:2018) has been prepared by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by NBN.This European St
18、andard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by July 2018, and conflicting national standards shall be withdrawn at the latest by July 2018.Attention is drawn to the possibility that some of the elements of this
19、document may be the subject of patent rights. CEN not be held responsible for identifying any or all such patent rights.EN 17098, Plastics Barrier films for agricultural and horticultural soil disinfection by fumigation , consists of the following parts: Part 1: Specifications for barrier films Part
20、 2: Method for determining film permeability using a static technique According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark
21、, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.4BS EN 170
22、981:2018EN 17098-1:2018 (E)IntroductionUse of barrier films designed for agricultural and horticultural soil disinfection by means of fumigation has the main objectives of protecting operators and personnel during and after the fumigation operation, limiting the consumption of harmful substances and
23、 safeguarding the environment.5BS EN 170981:2018EN 17098-1:2018 (E)1 ScopeThis document specifies the requirements relating to the dimensional, mechanical and physicalchemical characteristics of thermoplastic barrier films designed for agricultural and horticultural soil disinfection by means of fum
24、igation.This document specifies also the test methods for verifying these requirements, except the method for determining film permeability using a static technique, which is specified in EN 170982.This document defines also guidance for installation, use and disposal of barrier films.This document
25、is applicable to films used during soil disinfection by fumigation (class 1), and to films used during soil disinfection subsequently kept in situ as mulch films (class 2).On the date of publication of this document, the barrier films are multilayer films.2 Normative referencesThe following document
26、s are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.EN 16472, Plastics M
27、ethod for artificial accelerated photoageing using medium pressure mercury vapour lampsEN 170982, Plastics Barrier films for agricultural and horticultural soil disinfection by fumigation Part 2: Method for determining film permeability using a static techniqueEN ISO 291, Plastics Standard atmospher
28、es for conditioning and testing (ISO 291)EN ISO 5271, Plastics Determination of tensile properties Part 1: General principles (ISO 527-1)EN ISO 5273, Plastics Determination of tensile properties Part 3: Test conditions for films and sheets (ISO 527-3)EN ISO 48921, Plastics Methods of exposure to lab
29、oratory light sources Part 1: General guidance (ISO 4892-1)EN ISO 48922:2013, Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc lamps (ISO 4892-2:2013)EN ISO 48923:2016, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lamps (ISO 4892-3:2016)EN
30、 ISO 77651:2004, Plastics film and sheeting Determination of impact resistance by the free-falling dart method Part 1: Staircase methods (ISO 7765-1:1988)ISO 4592, Plastics Film and sheeting Determination of length and widthISO 4593, Plastics Film and sheeting Determination of thickness by mechanica
31、l scanning3 Terms and definitions, and abbreviated terms3.1 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/www.
32、electropedia.org/6 BS EN 170981:2018EN 17098-1:2018 (E) ISO Online browsing platform: available at http:/www.iso.org/obp3.1.1barrier filmplastic film designed to have low permeability to gas, intended for soil disinfection by fumigation3.1.2permeabilityability of a material to transmit gases and liq
33、uids by passage through one surface and out at another surface by diffusion and sorption processesSOURCE: EN ISO 472:2013 1, definition 2.6903.1.3widthtotal film width once laid flatNOTE It is expressed in millimetres (mm).3.1.4nominal widthfilm width, as declared by the manufacturer/supplierNOTE It
34、 is expressed in millimetres (mm).3.1.5nominal thicknessfilm thickness, as declared by the manufacturer/supplierNOTE It is expressed in micrometres (m).3.1.6roll lengthlongest dimension of the film, corresponding to the length of the unwinded rollNOTE It is expressed in metres (m).3.1.7nominal roll
35、lengthroll length, as declared by the manufacturer/supplierNOTE It is expressed in metres (m).3.1.8longitudinal directionMDdirection parallel to the roll length corresponding to the extrusion direction3.1.9transverse directionTDdirection parallel to the film width (at right angle to the length)3.2 A
36、bbreviated termsFor the purposes of this document, the following abbreviated terms apply.EVOH ethylene(vinyl alcohol) plasticPA polyamidePE polyethylene7BS EN 170981:2018EN 17098-1:2018 (E)TIF totally impermeable filmVIF virtually impermeable film4 Classification of films by service lifeBarrier film
37、s are classified under two classes, depending on their service life:a) Class 1: films providing a protective function only. They are held in place during the fumigation operation and then withdrawn before planting.b) Class 2: films providing protection and mulch functions. They are held in place dur
38、ing the fumigation operation, and then kept in place as mulch films.5 Permeability to fumigants5.1 GeneralCEN/TC 249/WG 7 conducted a synthesis of the published studies about film permeability to the fumigants. These studies were all carried out in the USA with major films on the market, described a
39、s: PE films made from polyethylene (PE) materials, exclusively;NOTE In these studies, PE films were used as blank films and they are not in the scope of this document. virtually impermeable films (VIFs) containing polyamide (PA) materials as barrier layer; totally impermeable films (TIFs) containing
40、 ethylene(vinyl alcohol) plastic (EVOH) materials as barrier layer.The key criteria in these studies were the following:a) the influence of the temperature;b) the influence of the relative humidity;c) the influence of the fumigant.Taking into account the results of these studies, the conclusions of
41、the CEN/TC 249/WG 7 were the following:d) the film permeability increases with the temperature (from 20 C to 35 C) for every film and every tested fumigant but without a highly significant difference. The most common temperature, 25 C, is therefore considered to be acceptable and has been selected a
42、s the standard test temperature (see Conditions 1 and 2 in 5.2);e) the film permeability increases with the relative humidity (from 35 % to 100 %) for every film and every tested fumigants with highly significant differences particularly for VIFs. The relative humidity in the range of 90 % RH to 100
43、 % RH is the worst case. This range of relative humidity, similar to that measured in situ in drip applications, has been selected as the standard relative humidity (see Condition 1 in 5.2).Considering that fumigant could be applied also by shank application without water a second standard relative
44、humidity of (50 10) % RH has been considered as acceptable for films to be used exclusively in shank application without water (see Condition 2 in 5.2);f) the film permeability varies significantly depending on the fumigants. In these conditions the choice of a fumigant for the test is under the res
45、ponsibility of the applicant and the film permeability threshold remains under the responsibility of the holder of the authorization for placing the fumigant on the market.8 BS EN 170981:2018EN 17098-1:2018 (E)Information related to the influence of temperature and relative humidity on the film perm
46、eability to soil fumigants is given in the bibliography 14 to 18.5.2 Determination of the film permeabilityThe permeability of the film to fumigant(s) shall be determined according to EN 170982.Unless otherwise specified, the permeability of the film to fumigant(s) shall be determined in at least on
47、e of the following test conditions in the transmission cell: Condition 1: Test temperature: (25 2) C and (95 5) % RH;NOTE 1 Condition 1 is corresponding to environment conditions with the addition of water (e.g. in drip application). Condition 2: Test temperature: (25 2) C and (50 10) % RH.NOTE 2 Co
48、ndition 2 is corresponding to environment conditions without the addition of water (e.g. in shank application).Condition 2 shall be used only for shank application.NOTE 3 Even by injection of the fumigant by means of coulters without the addition of water, quickly the humidity of soil condensates un
49、der the film which causes formation of droplets.When the performance of a film to fumigant permeation is declared, the test conditions (Condition 1 or condition 2 or both) and the type(s) of fumigant(s) shall be declared as well.Studies are in progress to define the maximum threshold(s) depending on the type and approval threshold(s) of the fumigant(s) set by the regulation.6 Requirements6.1 General requirementsWhen tested in accordance with the test met
