ISO 15034 pdf download

ISO 15034 pdf download.Composites — Prepregs — Determination of resin flow 1 Scope This International Standard specifies a procedure for the determination of the resin flow of prepregs made of continuous reinforcement impregnated with epoxy and/or unsaturated-polyester resin. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 291 :1 997, Plastics — Standard atmospheres for conditioning and testing. ISO 472:1 999, Plastics — Vocabulary. ISO 8604:1 988, Plastics — Prepregs — Definitions of terms and symbols for designations. ISO 9782:1 993, Plastics — Reinforced moulding compounds and prepregs — Determination of apparent volatile- matter content. 3 Terms and definitions For the purposes of this International Standard, the terms and definitions given in ISO 472 and ISO 8604 apply. 4 Principle A test specimen is cut from a prepreg sample and placed between bleeder cloth and release film. This assembly is cured at the test temperature and pressure in a hot press. After curing, any resin which flowed beyond the original dimensions of the test specimen is removed. The resin flow is calculated as the percent difference between the mass of the test specimen before and after curing. 5 Apparatus 5.1 Cutting template, made of metal or ceramic material, measuring (1 00 1 ) mm by (1 00  1 ) mm and about 5 mm thick. Hard metals such as steel are recommended. 5.2 Knife, single-edge. 5.3 Analytical balance, capable of weighing to the nearest 1 mg.5.4 Glass bleeder cloth, 1 81 style or equivalent. 5.5 Release film (perforated), heat-resistant, for example polytetrafluoroethylene, with suitable perforations through which the resin can flow out. 5.6 Release film (unperforated), heat-resistant, for example a copolymer of tetrafluoroethylene and hexafluoroethylene (FEP). 5.7 Heated platen press, capable of raising the temperature to 200 °C and maintaining the pressure at up to 600 kPa over a 1 00 mm by 1 00 mm area. 6 Preparation of test specimens 6.1 A minimum of three specimens shall...