CEN/TC 249/SC 2/WG 3 - Prepregs - Composites with random reinforcements

CMC - Modification to references in Table 3

This part of prEN 14598 specifies the requirements for physical and chemical properties of Sheet moulding Compounds (SMC) and Bulk Moulding Compound (BMC) and compression or injection moulded specimens. The selection in this part is limited to those materials the composition and properties of which are significantly different.
Furthermore the selection is limited to those materials which are of more general technical and / or economical importance.
The properties which are used for the characterization of the moulding compounds, the test methods and the test conditions are based on part 2 of this standard. The list of properties is selected, initially, from those general test methods found in ISO 10350-1, Plastics - Acquisition and presentation of comparable single-point data - Part 1 : Moulding materials.
The moulding compounds are divided into types corresponding to their composition and properties. The designation of the types of moulding compounds is based on part 1 "Designation" of this standard.

1.1   This part of prEN 14598 establishes a data block system for the designation of Sheet Moulding Compounds (SMC) and Bulk Moulding Compounds (BMC)
1.2   The types of SMC and BMC are differentiated from each other by a classification system based on information about basic polymer parameters, fillers/reinforcement content and type, intended method of processing and/or manufacturing, specific characteristics and designatory properties.
1.3   This International Standard is applicable to all  SMC and BMC  ready for normal use in the form of sheets  and bulks.
1.4   It is not intended to imply that materials having the same designation give necessarily the same performance. This part of prEN 14598 does not provide engineering data, performance data or data on processing conditions which may be required to specify a material for a particular application and/or method of processing.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.
1.5   Whenever general requirement data in the part 3 of this International Standard need to be indicated, this data block system is also the basis for it.
1.6   To ensure that the meanings of codes remain unambiguous and to avoid conflicts within the system codes and abbreviations have to be coordinated with ISO/TC 61/SC 1.

This part of EN 14598 specifies the methods of preparation of test specimens and the test methods to be used in
determining the properties of Sheet Moulding Compound (SMC) and Bulk Moulding Compound (BMC).
Requirements for handling test material and for conditioning both of the test material before moulding and of the
specimens before testing are found here.
Procedures and conditions for the preparation of test specimens and procedures for measuring properties of the
materials from which these specimens are made are given. Properties and test methods which are suitable and
necessary to characterize SMCs and BMCs are listed.
The properties have been selected from the general test methods in EN ISO 10350-2, Plastics - Acquisition and
presentation of comparable single-point data - Part 2 Long-fibre-reinforced plastics. Other test methods in wide
use for or of particular significance to these compression and injection moulding materials are also included in this
part of EN 14598, as are the designatory properties found in Part 1: Designation.
In order to obtain reproducible and comparable test results, it is necessary to use the methods of preparation and
conditioning, test-specimens with the dimensions and the test procedures specified herein. Values determined will
not necessarily be identical to those obtained using test-specimens of different dimensions or prepared using
different procedures.

This european standard specifies the general principles and procedures for the preparation of compression moulded test plates from fibre reinforced thermo- setting moulding compounds such as Sheet Moulding Compound (SMC), Bulk Moulding Compound (BMC) and Dough Moulding Compound (DMC). The purpose of this European Standard is to specify the preparation of flat test plates from which test specimens can be machined (for applicable test purposes see informative Annex A). Test plates are being manufactured to give representative results by the different test procedures using specimens machined out of these test plates.

This European Standard specifies a method to determine the moulding shrinkage of compression moulded test specimens of thermosetting materials. It applies only to materials which exhibit no post-shrinkage after moulding such as polyester SMC and BMC. Knowledge of the shrinkage of these thermosetting materials is necessary for the construction of moulds and for establishing the suitability of the moulding material to produce parts with accurate dimensions.

This European Standard specifies a test method to determine the degree of wet out of the reinforcement in a sheet moulding compound (SMC). It is applicable for quality control by the user of the SMC as well as for the process control during the SMC production.

Describes a method for the determination of the mass per unit area of moulding compounds and preimpregnated sheets, tapes, fabrics and mats (prepregs). Applicable to prepregs irrespective of which reinforcement (aramid, carbon, glass, etc.) or which type of matrix (thermosetting or thermoplastic) is used.