EN 787-1994 pdf download.Sacks for the transport of food aid – Sacks made of polyethylene film.
This EN 787 specifies the general characteristics, require inents and methods of test for sacks made of polyethylene film.
This standard applies to sacks made of polyethylene film with a net filling weight up to 2 000 g for packing and transporting foodstuffs for food aid and to polyethylene film sacks with a net filling weight up to 1 000 g supplied as empty sacks together with foodstuffs packed in sacks for the distribution of small quantities.
The packaging surrounding filled sacks is not covered by this standard.
2 Normative references
This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies.
EN 22233:1992, Packaging — complete filled Ira ii sport packages. Gon dii ion ing for test lug.
(ISO 2233:1986)
EN 26590-2:1992, Packaging — Sacks — Vocabulary and types — Part 2: Sacks made from thermoplastic flexible film.
(ISO 6590-2: 1986)
EN 26591-2:1992. Packaging — Sacks —Description and method of measurement — Part 2: Empty sacks made from thermoplastic flexible film. (ISO 6591-2:1985)
EN 27023:1992. Packaging — Sacks — Method of sampling empty sacks for testing.
(ISO 7023:1983)
ISO 1184:1983. Plastics — Determination of tensile properties of films.
ISO 7765-1:1988, Plastic film and sheeting — Determination of impact resistance by the free-falling dart method — Part 1: Staircase method.
3 Definitions
For the purpose of this Standard, the following definitions apply.
NOTE Other terms used in the manufacture of sacks are defined in EN 2659O-2:196.
3.1
sack made of polyethylene film
container made from polyethylene tubular film sealed at least at one end by a seam
3.2
ply
a film of polyethylene forming the walls of a sack
3.3
heat-sealed seam
a closure produced by heat-sealing the bottom or top
of the sack
4 General characteristics
4.1 Construction
4.1.1 The sacks shall be made of polyethylene tubular film.
4.1.2 The sacks shall be made of only one ply.
4.1.3 The sacks shall be flat.
4.1.4 The empty sacks, laid flat, shall have a rectangular shape.
4.1.5 The sack seam shall be designed to prevent leakage of the product during transport.
4.2 Dimensions
4.2.1 The sack dimensions shall be chosen so that the dimensions of the filled sack are aligned with the specified dimensions of the surrounding packaging.
4.2.2 The dimensions and dimensional tolerances of the sack should be agreed upon between the purchaser and the supplier.
4.2.3 The dimensions and dimensional tolerances of the sack shall be recorded in the ordering documents.
4.2.4 The description of the dimensions, the methods of measuring the dimensions and the dimensional designation of the sack shall be in accordance with EN 26591-2.
4.3 Food compatibility
Sacks which come in contact with foodstuffs shall meet the legal requirements of the CEN member states which are applicable to them.
5 Test methods and requirements
5.1 Sampling
5.1.1 Sampling shall be in accordance with EN 27023. At least 30 empty sacks shall be sampled.
5.1.2 Samples shall be taken on the day that the empty sacks are ready for dispatch at the supplier’s.
5.1.3 If, as a result of an accident during sampling or testing, resampling is necessary, a new sample shall be taken by the same procedure. Selection may then, however, be made from the same units as before unless agreed otherwise.
5.2 Conditioning
5.2.1 Before testing, all samples shall be conditioned in accordance with EN 22233: 1992 condition G (temperature + 23°C ± 2 °C, relative humidity 50 % ± 5 %).
5.2.2 The minimum period for conditioning shall be not less than 8 h.
5.2.3 The various tests described below shall be carried out in the same atmospheric conditions as used for conditioning.
If this is not possible. the tests shall commence within 10 mm of conditioning.
5.3 Test date
All tests shall be carried out within 4 weeks of the date that the empty sacks are ready for dispatch at the supplier’s.
5.4 Tests
5.4.1 Determination of the tensile force of the film
The tensile force of the film shall be determined as described in ISO 1184 using 15 mm wide test strips, with a gauge length of 100 mm and a testing speed of 500 rnmlmin.EN 787-1994 pdf download.