BS 3412:1992 pdf free.Methods of specifying general purpose polyethylene materials for moulding and extrusion.
This British Standard gives a method for specifying the composition and property requirements of ethylene homopolymers and ethylene copolymers having a maximum content of other 1-olefin monomers of less than 50 0% (m/m). In addition, those with a content of non-olefinic monomers with functional groups up to a maximum of 3 % (m/m) are specified in section 2 whilst those particularly for British Government Service contracts having in addition a content of non-olefinic monomers with functional groups up to a maximum of 30 0%) (m/m) are specified in section 3. This British Standard applies to materials ready for normal use in the form of powder, granules and to materials unmodified by colourants, additives, fillers, etc. It does not apply to masterbatches or to ethylene-propylene copolymer (EPM rubber).
NOTE The titles of the publications referred to in this standard are listed on page 15.
2.1.1 The system given in 2.1.2 shall be used. The ethylene homopolymer and copolymer materials are classified according to their method of processing, their designatory properties, i.e. conventional
density and melt flow rate, and supplementary information. The designation system is only intended to indicate a broad classification and in most circumstances specific values of the
designatory properties and other characteristics will be required (see 2.2.2.
2.1. 2 The designation shall consist of the following coded information, given in the following order and separated by a comma:
a)the number and date of this British Standard,ie.bs3412:1992;
b)identification of the plastics material, i.e. PE (polyethylene)
c)the code as given in Table 1 corresponding to the intended application and method of processing.
d)the code as given in Table 2 corresponding to additives and other supplementary information;BS 3412 pdf download.