Textilie

Oblast zaměření: Textilie
Komise : CEN/TC 248 (Textiles and textile products)
Původce: CEN
K připomínkám do: 27.10.2018
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This International Standard specifies, for ropes of different kinds, a method of determining each of the following characteristics:

linear density;

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lay length;

braid pitch;

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breaking force.

The linear density, lay length and braid pitch are measured with the rope under a specified tension called the reference tension, as specified in Annex A.

The elongation corresponds to the measured increase in length of the rope when the tension to which it is subjected is increased from an initial value (reference tension) to a value equal to 50 % of the minimum specified breaking strength of the rope.

The breaking force is the maximum force registered (or reached) during a breaking test on the test piece, carried out on a tensile testing machine with constant rate of traverse of the moving element. The breaking force values given in the tables of rope specifications are only valid when this type of testing machine is used.

When it is not possible to test the rope in full size, the method described in Annex B can be used, subject to agreement between the parties involved.

This International Standard also provides a method for measuring water repellence, lubrication and finish content, when requested by the customer.

Oblast zaměření: Textilie
Komise : CEN/TC 248 (Textiles and textile products)
Původce: CEN
K připomínkám do: 13.11.2018
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This International Standard specifies common methods for the quantitative microscopical analysis of various mixtures of fibres. The methods described is based on the using of a light microscope (LM) or a Scanning Electronic Microscope (SEM), on the measurements of the fibre apparent diameter (preparation of longitudinal views) or on the measurements of fibre section area (preparation of cross views), depending on the section shape of the fibres.

NOTE          When the section shape is circular or almost circular, the longitudinal views are appropriate. For the other section shapes, the cross views are adequate. Pictures of section shapes of fibres can be found in ISO/TR 11827.

The given procedures may be applied to fibres in any textile form when mixtures of fibres cannot be separated by manual methods or by chemical methods.

For examples, such mixtures are cashmere and wool, cotton and flax, flax and hemp.

If it is practicable to separate chemically the components, the method described in the individual parts of ISO 1833 should be used in preference to the microscopical methods.