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1、INTERNATIONAL STANDARD IS0 8351-2 First edition 1994-07-l 5 Packaging - Method of specification for sacks - Part 2: Sacks made from thermoplastic flexible film Emballages - Mthode de spkification des sacs - Partie 2: Sacs faits dun film thermoplastique flexible Reference number IS0 8351-2:1994E) IS0
2、 93512:1994(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subjec
3、t for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC)
4、 on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standa
5、rd IS0 8351-2 was prepared by Technical Committee ISO/TC 122, Packaging, Subcommittee SC 2, Sacks. IS0 8351 consists of the following parts, under the general title Packaging - Method of specification for sacks: - Part 7: Paper sacks - Part 2: Sacks made from thermoplastic flexible film 0 IS0 1994 A
6、ll rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case
7、 Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii -,-,- INTERNATIONAL STANDARD 0 IS0 IS0 8351-2:1994(E) Packaging - Method of specification for sacks - Part 2: Sacks made from thermoplastic flexible film 1 scope This part of IS0 8351 provides a checklist for the characteristics
8、 to be specified when ordering sacks made from thermoplastic flexible film. These ordering specifications cover the description of the sack and do not deal with quantitative performance require- ments. This part of IS0 8351 is primarily intended for application to the types of sacks made from thermo
9、- plastic flexible film as specified in IS0 6590-2. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 8351. At the time of publication, the editions indicated were valid. All standards are subject to rev
10、ision, and parties to agreements based on this part of IS0 8351 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently valid International Standards. IS0 6590-2:1986, Packaging - Sack
11、s - Vocabulary and types - Part 2: Sacks made from thermoplastic flexible film. IS0 6591-2: 1985, Packaging - Sacks - Description and method of measurement - Part 2: Empty sacks made from thermoplastic flexible film. 3 Method of specification 3.1 General When drawing up the specification of a sack m
12、ade from thermoplastic flexible film for ordering purposes, customer and manufacturer shall consider each item in the following lists and, where relevant, mutually agree to include them in the ordering specifications at an appropriate level. The format of the ordering specification shall be agreed u
13、pon between the customer and the manu- facturer. 3.2 Description 3.2.1 Sack type 3.2.1.1 Open-mouth - heat-sealed flat; - heat-sealed gusseted; - pasted flat hexagonal-bottom; - pasted gusseted rectangular-bottom; - heat-sealed with corner seals; - other not specified above. 3.2.1.2 Valved (closed-m
14、outh) - valved heat-sealed flat; - side-valved heat-sealed flat; 1 -,-,- IS0 9351-2:1994(E) 0 IS0 - valved heat-sealed gusseted; - side-valved heat-sealed gusseted; - valved pasted flat hexagonal-ends; - other not specified above. 3.2.2 Tube type - without longitudinal seam: flat or gusseted; - with
15、 one or more longitudinal seams: flat or gusseted; - side-welded. 3.2.3 Dimensions The following dimensions, in millimetres, shall be specified in accordance with IS0 6591-2. - length of sack, Q - width of sack, b - width of gusset, e - width of bottom, c - width of valve, g - length of valve, f - w
16、idth of valve sleeve, Y - length of valve sleeve, i - valve sleeve position, 1: distance between outer- most edge of sack and outermost edge of valve sleeve, measured parallel to the bottom. 3.2.4 Type of material Each ply shall be specified by its type, thickness (in micrometres) or grammage (in gr
17、ams per square me- tre), special treatment (e.g. antislip, antistatic). If there is any surface treatment, the direction of treatment should be stated (e.g. face in, face out, both sides). The materials shall be characterized as follows: - loose or integral; - paper type e.g. normal (flat) sack pape
18、r, extensible sack paper and grammage; - film type, e.g. PE-LD, PE-LLD, PE-HD, PVDC or WAC; - film state (flat or tubular); - film thickness, in micrometres; - film melt flow index, in grams per 10 min; - length, in millimetres, where different from other plies (usually when loose or integral tubula
19、r); - gusset, in millimetres, where different from other plies (usually when loose or integral tubular); - width, in millimetres, where different from other plies (usually when loose or integral tubular); - heat seal distance, in millimetres, from adjacent sack or thermoplastic ply transverse edge;
20、- skirt length, in millimetres, loose type only; - Z-fold; - cuffed or uncuffed; - material combinations, e.g. extrusion-coated alu- minium or textiles, with their respective charac- teristics. 3.2.5 Perforations - beneath valve: number, size and pattern; - ply: number, spacing, size and location of
21、 holes. 3.2.6 Valve/sleeve - valve type: internal sleeve, external sleeve, re- inforced sleeve, etc.; - valve position: i.e. in which corner of sack; - sleeve materials. 3.2.7 Longitudinal seam - continuous or interrupted; - overlap width, in millimetres. 3.2.8 Bottom cap - position: valved end, non
22、-valved end; - material: type and thickness or grammage; - dimensions, in millimetres: length, width. 2 0 IS0 IS0 8351-2:1994(E) 3.2.9 Bottom orientation - folded towards sack face side; - folded towards sack back side. 3.2.10 Heat-sealed closures - distance, n, of heat seal from sack edge; - heat s
23、eal position: top or bottom of sack in relation to print. - bundles in palletized units: total number of sacks per unit; - bundle stacking pattern; - shingled reels: diameter and overlap in millimetres, number of sacks; - pallet size and type, four-way entry/two-way entry; - maximum unit height, in
24、millimetres; - special requirements for automatic packers; 3.2.11 Filling aperture (open-mouth sacks only) - transverse pasting (yes/no) on all plies (yes/no, in- nermost without transverse pasting); - thumb cut, yes/no. 3.2.12 Printing - complete description of requirements and position of major el
25、ements of print, e.g. face side, back side, gussets, valve end, non-valve end and direc- tion to valve end; - ink colours and requirements, e.g. abrasion- resistant, UV-resistant. 3.2.13 Packaging - sacks in bundles: tied/untied/folded; - bundles in bales: total number of sacks per bale; - pallet wr
26、apping: plastic, paper, shrink wrap, stretch wrap, wooden frame or fibre board on top of pallet; - pallet strapping: steel, plastic; - protection from strapping; - labelling of pallet load. 3.2.14 Accompanying documentation - customers specification number; - manufacturers specification number; - delivery address; - invoice address; - other acknowledgement. 3 -,-,- IS0 8351-2:1994(E) 0 IS0 ICS 55.080.00 Descriptors: packaging, plastics products, flexible plastics, plastic sheets, bags, technical data sheets, orders (sales documents). Price based on 3 pages