ISO 14631 pdf download

ISO 14631 pdf download.Extruded sheets of impact-modified polystyrene (PS-I) — Requirements and test methods 1 Scope This standard specifies the requirements and test methods for solid flat extruded sheets of impact-modified polystyrene (PS-I 1 ) without fillers and reinforcing materials. This standard applies only to thickness 0,25 mm to 20,0 mm in accordance with clause 3. This standard also applies to PS-I sheet in roll form. 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 incorpo- rated in it by amendment or revision. For undated references the latest edition of the publi- cation referred to applies. 3 Material Sheets shall be made of PS-I extrusion compounds designated by ISO 2897-1 without filler and reinforcing material. Extrusion compounds can contain additives such as processing aids, stabilizers, flame protective agents and colorants. Compounds and additives of un- known identity shall not be used. NOTE: Legal conditions can cause a specific choice of extrusion compounds (see 4.3.3). 4 Requirements 4.1 Appearance Sheets shall be substantially free from bubbles, voids, cracks, visible impurities and other defects which would make them unfit for the intended use. Surfaces shall be substantially smooth, if not embossed, and free from grooves, sink marks or damages. Colorants shall be homogeneously distributed throughout the material. Slight colour differences based on ex- trusion compounds and processing are admissible. Admissible variations in any of the above as well as gloss level specifications, if required, shall be agreed between the interested par- ties. Sheets shall be examined in accordance with 5.3.4.2.2 Length and width Nominal length , l n ,and nominal width , b n ,of sheets shall be agreed between the interested parties. Unless agreed differently, the length is in the direction of extrusion. For any individ- ual sheet selected at random from any delivery, the tolerances of length and width shall be in accordance with table 1 . Testing shall be in accordance with 5.4.2. 5 Test Methods 5.1 Test specimens 5.1.1 Preparation of test specimens Representative test specimens shall be cut longitudinally and transversely evenly distributed over the length and width of the sheet. From a sheet in roll form, a 2 m sample shall...