ISO 1872-2 PDF
ISO Plastics — Polyethylene (PE) moulding and extrusion materials — Part 2: Preparation of test specimens and determination of properties. INTERNATIONAL. STANDARD. ISO. Third edition. Plastics — Polyethylene (PE) moulding and extrusion materials —. Part 2: Preparation of . This British Standard was published by BSI. It is the UK implementation of. EN ISO It supersedes BS EN ISO which.
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Plastic Testing Leader-Elastomers-Composites-Polymer testing PTLI
Designation system and basis for specifications. A British Standard does 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.
Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, pages ii to iv, pages 1 to 6 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.
Designation system and basis for specifications ISO Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member.
A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by Novemberand conflicting national standards shall be withdrawn at the latest by November The work of preparing International Standards is normally carried out through ISO technical committees.
Each member body interested in a subject 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. This second edition cancels and replaces the first edition ISO ISO consists of the following parts, under the general title Plastics — Polyethylene PE moulding and extrusion materials: Designation system and basis for specifications; — Part 2: Preparation of test specimens and determination of properties.
It applies to materials ready for normal use in the form of powder, granules or pellets, unmodified or modified by colorants, additives, fillers, etc.
If such additional properties are required, they shall be determined in accordance with the test methods specified in part 2 of this International Standard, if suitable. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.
Basic polymers and their special characteristics.
For unambiguous designation, the individual-item block is subdivided into five data blocks comprising the isoo information: The data blocks shall be separated from iao other by commas. If a data block is not used, this shall be indicated by doubling the separation sign, i.
The code-letters used are specified in Table 1. If information is presented in positions 2 to 8 and no specific information is given in position 1, the letter X shall be inserted in position 1. Table 1 — Code-letters used in data block is 3. The two code-numbers are separated from each other by hyphens. If a property value falls on or near a range limit, the manufacturer shall state which range will designate isoo material.
If subsequent individual test values lie on, or on either side of, the range 18772-2 because of manufacturing tolerances, the designation is not affected.
NOTE 1 Not all the combinations of the values of the designatory properties are provided by currently available polymers. Intended application or method of processing see 3. Positions 2 to 8: Important properties, additives and supplementary information see 3. Designatory properties see 3. Fillers or reinforcing materials and their nominal content see 3. For the purpose of specifications, a fifth data block may be added containing additional information.
After being cut off, the strand is allowed to fall on a cool metal plate. It is subsequently annealed by immersing it in ml of boiling water in a beaker, boiled for 30 min, and allowed to cool for 1 h by keeping the beaker and contents in the laboratory atmosphere.
The density of the specimen is then determined within 24 h in accordance with ISO The possible values of density are divided into 10 ranges, each represented by a 2-figure code-number as specified in Table 2. Table 2 — Code-numbers used for density in data block 3 3. The possible values of melt mass-flow rate are 187-2 into 11 ranges, each represented by a 3-figure code-number as specified in Table 4. The test conditions used shall be iwo by a single code-letter, as specified in Table 3, immediately preceding the code-number indicating the range.
Subsequently without a spacethe mass content may be given by a 2-figure number in positions 3 and 4. Table 5 — Code-letters for fillers and reinforcing materials in data block 4 3. This shall be done for example by reference to a suitable national standard or to a standard-like, generally established specification.
In the case of metals Mit is essential to indicate the type of metal by means of its chemical symbol.
Polyethylene (PE) molding and extrusion materials
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.
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