BS ISO 2559:2011 pdf download.Textile glass – Mats (made from chopped or continuous strands) – Designation and basis for specifications.
4 Technical requirements
4.1 General
A given mat shall be designed so as to satisfy the requirements of one or several applications. Essentially, a specific mat is chosen so as to bring to the laminate its reinforcement properties under certain environmental conditions, which may range from a dry inert to a wet corrosive atmosphere.
The expected product performance properties are generally not guaranteed as such due to the difficulty in standardizing the conditions under which the mat is used (resin mix, cure system, laminate structure. glass/resinlfiller ratio. etc.). For this reason, the mat will be characterized in the specification by other guaranteed properties which can be correlated with the desired practical laminating properties. The latter can be divided into characteristic, controlled and visual properties, as defined in Clause 3.
Where required, the controlled properties (measured parameters) may be stated on certificates of conformity or other quality control test reports.
The following is a proposed list of characteristic” and controlled” properties with, when applicable, the relevant test method. The distinction between characteristic and controlled properties is indicative only, and may vary for different mat products.
The specification for a given mat shall include the relevant properties among those listed hereafter, with tolerances where applicable.
4.2 Characteristic properties
4.2.1 ResIn compatibility
The resin(s) recommended for use with the mat.
4.2.2 Glass type
The glass type as defined in ISO 2078.
4.2.3 Filament diameter
The average diameter of the filaments constituting the strands in the mat. If necessary, the average filament diameter may be determined in accordance with ISO 1888.
4.2.4 Strand linear density
It is not normally possible to determine the linear density of the strands in the mat since they might have been split and/or chopped during the production process. Therefore the figure quoted is usually that of the input strand, the linear density of which can only be determined by the mat manufacturer.
4.2.5 Strand length
The length of the strands, which may be either unchopped (continuous-filament mat) or chopped to a given length, with the possibility of a mix of different specified lengths (chopped-strand mat).
4.2.6 Size type
The type of size (essentially the type of coupling agent) used to coat the filaments.
4.2.7 Bonding system
The system used to bond the strands, which may be
— either of a chemical type. e.g. a liquid binder (emulsion) or a solid binder (powder).BS ISO 2559 pdf download.