1、BRITISH STANDARD BS 2548:1986 Specification for Wood wool for general packaging purposes UDC 674.821:621.798.22BS2548:1986 This British Standard, having been prepared under the directionof the Packaging and Freight Containers Standards Committee, was published underthe authority ofthe BoardofBSIandc
2、omes into effect on 30 April1986 BSI 11-1999 First published January 1955 First revision April 1986 The following BSI references relate to the work on this standard: Committee reference PKM/573 Draft for comment 85/35660 DC ISBN 0 580 15129 8 Committees responsible for this British Standard The prep
3、aration of this British Standard was entrusted by the Packaging and Freight Containers Standards Committee (PKM/-) to Technical Committee PKM/573 upon which the following bodies were represented: British Paper and Board Industry Federation (PIF) British Rubber Manufacturers Association Institute of
4、Packaging Ministry of Defence Pressed Felt Manufacturers Association Telecommunication Engineering and Manufacturing Association (TEMA) The Research Association for the Paper and Board, Printing and Packaging Industries (PIRA) Amendments issued since publication Amd. No. Date of issue CommentsBS2548
5、:1986 BSI 11-1999 i Contents Page Committees responsible Inside front cover Foreword ii 1 Scope 1 2 Materials and manufacture 1 3 Performance 1 4 Retesting 1 5 Packing 1 Appendix A Sampling 2 Appendix B Determination of dust and small pieces 2 Appendix C Determination of dimensions 2 Appendix D Dete
6、rmination of pH 2 Publications referred to Inside back coverBS2548:1986 ii BSI 11-1999 Foreword This British Standard, originally prepared at the request of the Association of British Wood Wool Manufacturers, has now been revised under the direction of the Packaging and Freight Containers Standards
7、Committee to delete imperial units of measurement and to include sampling provisions for the assessment of compliance. BS2548:1954 is withdrawn. Wood wool is manufactured in a number of grades, ranging in nominal dimensions from1.4mm wide and0.075mm thick to6mm wide and0.375mm thick. It is not the p
8、urpose of this standard to deal with grades for special uses, although many of these grades will comply with it in respect of all requirements except dimensions. The standard is intended to cover only the grade of wood wool most commonly used for general packaging purposes, e.g.for the packaging of
9、machinery and other engineering equipment, furniture, glassware and ceramics. Requirements for cushioning properties are not specified but general guidance on the selection and use of cushioning materials is given in BS1133-12. A British Standard does not purport to include all the necessary provisi
10、ons 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. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages1 and2, an in
11、side back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS2548:1986 BSI 11-1999 1 1 Scope This British Standard specifies dimensions, pH, moisture content a
12、nd general requirements for wood wool for general packaging purposes. The standard does not apply to grades manufactured for specialized uses. NOTEThe titles of the publications referred to in this standard are listed on the inside back cover. 2 Materials and manufacture 2.1 General The wood wool sh
13、all be in the form of a knit mass of tangled strands and shall be manufactured from sound, well-seasoned softwood of low resin content and it shall be clean. NOTEWood wool should also be free as far as practicable from knots and cross grains. 2.2 Dust and small pieces When samples of wood wool are s
14、elected as described in Appendix A and examined as described in Appendix B, the mass of dust and small pieces under25mm in length shall not exceed4%(m/m). 2.3 Dimensions of strands The mean dimensions of individual strands, determined as described in Appendix C, shall be as follows: 3 Performance 3.
15、1 pH The pH of a water extract of the material, determined as described in Appendix D, shall be not less than4.5 nor greater than8.0. 3.2 Moisture content The wood wool shall contain between12%(m/m) and20%(m/m) of moisture, calculated on the mass of the material as received by the purchaser, when5g,
16、 selected as described in Appendix A, are weighed before and after drying for5h at104 1 C. NOTEAs wood wool is liable to change in moisture content when exposed to the atmosphere, it is emphasized that the term “as received” applies to the time at which the purchaser accepts delivery, i.e.when the w
17、ood wool is delivered to the purchasers premises if the supplier is responsible for transport, or when the wood wool leaves the manufacturers premises if the purchaser is responsible for transport. 4 Retesting Should any sample selected as described in Appendix A not comply with the requirements giv
18、en in2.2, 2.3, 3.1 and3.2, further samples shall be selected as described in Appendix A from two other bales in each25 of the consignment and retested. Should the average retest values so obtained comply with the requirements, the whole consignment shall be deemed to comply. 5 Packing Wood wool shal
19、l be packed in bales of a mass to be stated by the manufacturer; the stated mass shall be the net mass exclusive of battens and similar accessories used for packing purposes. width 1.75 0.25mm thickness 0.28 0.04mmBS2548:1986 2 BSI 11-1999 Appendix A Sampling Select one bale in every25 from the cons
20、ignment, or one bale from any quantity less than25 bales. From each bale take three portions, each approximately250g, one from the centre and one from each end, and mix together. The result represents a sample. Appendix B Determination of dust and small pieces Take approximately500g from each sample
21、 (seeAppendix A), weigh, recording the mass to the nearest gram, shake in a bag and turn out on to a clean surface. Examine visually and gravimetrically for dust and small pieces. Appendix C Determination of dimensions Select from each sample (seeAppendix A)20 representative individual strands of ma
22、terial. Determine the width and thickness of each strand using a screw micrometer capable of reading to an accuracy of0.01mm. Calculate the mean width and thickness, recording the result to the nearest0.01mm. Appendix D Determination of pH Take approximately10g of material from each sample (seeAppen
23、dix A), add400mL of boiling distilled water and stir thoroughly. Allow to stand for18h, taking suitable precautions against contamination by atmospheric impurities. Stir thoroughly and allow to stand for a further1h. Decant200mL of the solution (filtering if necessary through a dry sintered glass fi
24、lter and rejecting the first25mL of filtrate) and determine the pH using a standard pH electrode. NOTEAttention is drawn to the desirability of calibrating the apparatus in accordance with BS1647.BS2548:1986 BSI 11-1999 Publications referred to BS1133, Packaging code 1) . BS1133-12, Cushioning mater
25、ials (excluding packaging felt). BS1647, pH scale. 1) Referred to in the foreword only.BS 2548:1986 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe
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