ISO 10352-2020 pdf free.Fibre-reinforced plastics — Mouldingcompounds and prepregs — Determination of mass per unit areaand fibre mass per unit area.
This document specifies a method for the determination of the mass per unit area. It also specifies fivemethods (Method A to Method E) for the determination of the fibre mass per unit area of mouldingcompounds and prepregs. The five methods are as follows:
– Method A: Extraction by Soxhlet;
– Method B:Extraction by immersion in solvent in a beaker;-Method C: Decomposition by loss ignition;
– Method D: Extraction by wet combustion;—Method E: Method by calculation.
This document is applicable to the following types of materials:
– moulding compound and preimpregnated unidirectional sheet, tape, fabric and mats;
prepregs in which any type of reinforcement (aramid, carbon, glass,etc.) and any type of matrix(thermosetting or thermoplastic) has been used.
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document. For dated references,only the edition cited applies. Forundated references, the latest edition of the referenced document(including any amendments) applies.
The mass of a test specimen of known area is determined.Two different specimen sizes are specified,depending on the type of material. If the material has been manufactured using a solvent or if thevolatile-matter content of the material is not negligible,the sample is conditioned in a specifiedatmosphere before test specimens are taken. The result is expressed as the mass per unit area.
Determination of mass by means of weighing to constant mass after extraction of the resin with suitablesolvent in a Soxhlet-type apparatus. Solvent to use shall be able to extract all the resin componentcompletely from the specimen.
Determination of mass by means of weighing to constant mass after extraction of the resin by aciddigestion. Use a solution of concentrated sulphuric acid and hydrogen peroxide.
lf the linear density (in accordance with IS0 1889) and the number of yarns per unit (in accordancewith ISO 4602) in use is known, the fibre mass per unit area can be simply calculated.ISO 10352 pdf download.