BS ISO 23388:2018 pdf download – Protective gloves against mechanical risks
Each area where impact protection is claimed shall be tested. Due to the test method (test specimensdimensions), protection against impacts on fingers cannot be tested.
A protective glove against mechanical risks can be designed and constructed to provide specific impactattenuation (for example, impact protection of knuckles, back of the hand, palm,).These gloves shall bein accordance with the following requirement.
When the tests were carried out according to 6.6,performance shall conform to Level 1 ofEN 13594:2015, Table 7.
5 sampling and conditioning
5.1 Conditioning of samples and all other test consumables (e.g.abrasive paper,EPDM, cotton canvas)is as follows:
temperature (23± 2)°C;- relative humidity (50±5) %.
The period of conditioning is at least 24 h. Tests shall preferably be performed in the above mentionedenvironment.
5.2lf the test is performed in a different environment and if the testing duration does not exceed15 min, it shall be started within 5 min after removal from the conditioning.
5.3lf special applications require testing in a different environment, it is the responsibility ofthe manufacturer or his authorized representative to arrange for additional tests and to presentthe results including a full description of the testing environment in the information supplied by themanufacturer (Clause 8).
6Test methods
6.1Abrasion resistance
6.1.1 Principle
Circular specimens of material are abraded under known pressure with a cyclic planar motion inthe form of a Lissajous figure (abrasion cycle) which is the result of the simple harmonic motions atright angles to each other.The resistance to abrasion is measured by the number of rubs required forbreakthrough to occur.
6.1.2 Consumables
An abradant shall meet the requirements as laid down in Annex A.
NOTE1 A suitable abradant has been tested by the standardization group, the Klingspor PL31B,Grit 1801)(see Annex A).
NOTE2 At the present time, only one calibration procedure is available using textile reference material.Amore robust calibration method for other reference material is still under construction. Double-sided adhesive tape
The double sided adhesive tape shall be used to provide adhesion of the sample during the test toachieve reproducible results.The mean adhesion value shall be of minimum 0,20 N/mm.
Tests shall be carried out according to the method given in Annex c.
NOTE1 lf the adhesion is not sufficient, the sample will move during the test and in this case a tearphenomenon can be observed rather than abrasion.
NOTE2 Examples of suitable double sided adhesive tapes are provided in C.5.Alternative tapes can be verifiedfor suitability using the test method defined in Annex C.
An abrasion machine of the type described in ISO 12947-1 as a Martindale Wear and Abrasion isrequired. It shall fulfil the following requirement:
Pressure on specimen: (9,0±0,2) kPa.
6.1.4 Test specimens
Four test specimens shall be taken from four individual gloves of the same glove series. In case of anirregular design of the palm, the test specimen shall be taken in the area where the least protection isexpected (remove the reinforcements that do not cover the whole palm).
Where the test specimen is made of several unbounded layers (e.g.glove made from several un-bondedlayers), the test is performed on each layer. When the specimen is made of bonded layers (e.g.glovemade from several bonded layers), if the layers can be separated without damaging the material, thetest shall be performed on each layer independently. Otherwise, the test shall be performed on alllayers, taking care not to have a seam in the test area.
6.1.5 Test procedure up the machine Mounting test specimens
Cut four test specimens to the correct dimensions, diameter (38,0±0,5) mm. Secure the test specimenwithout tension carefully and centrally on the metal insert by means of double-sided adhesive tapeunder a weight of approximately 10 kg applied for at least 5 min.Good adhesion can be achievedthrough the use of double-sided tape which prevents loosening of the test specimen and the inclusionof air bubbles. Place the ring of the specimen holder in position on the mounting plate provided on thebase of the machine.
In order to test the materials that are thicker than the standard ring (for example leather with athickness greater than 1,2 mm), the diameter of the opening of the clamping ring should be increased(see Figure 1).BS ISO 23388 pdf download.