Revised SATRA test methods released
Five footwear test method revisions have been announced by SATRA.
Each of the following footwear-related test methods have been revised to ensure that they reflect SATRA’s current procedures and formatting, in addition to accommodating a number of specific amendments, as mentioned below.
SATRA TM28:1994 – ‘Mass per unit area’ has been republished as SATRA TM28:2021. This method is intended to determine the mass per unit area of a sheet material. It is applicable to all sheet materials, but is primarily used with textiles and coated textiles. Test specimen conditioning requirements have been clarified.
SATRA TM33:1992 (2010) – ‘Strength perpendicular to needle perforations’ has been republished as SATRA TM33:2021. It is intended to determine the force required to pull a row of needles through a material in a direction perpendicular to the row. SATRA TM33 is applicable to all types of thin sheet material, but is mostly used with those having a woven fabric structure. The revision has clarified the correct preparation of the test specimens to be used and new figures have also been incorporated as a visual aid.
SATRA TM36:1999 – ‘Break/pipiness’ has been republished as SATRA TM36:2021. This method is used to determine the tendency of the top surface of a leather to wrinkle or buckle, as a result of loose fibres separating when it is folded grain surface inwards. This phenomenon is termed ‘break’ or ‘pipiness’. While the test is generally only applicable to leather, SATRA TM36 can be used with certain types of coated material. The test can be carried out on uncut sheets, cut components and completed products. Changes to the standard include a new figure incorporated as a visual aid for users.
SATRA TM199:1999 – ‘Water spotting – shoe care products’ has been republished as SATRA TM199:2021. It is utilised to determine the effect of a shoe care treatment (such as a polish or spray protector) on the resistance of a material to spotting damage by water. SATRA TM199 is applicable to any shoe care product which makes claims for water resistance or water repellency. Changes to the standard include further clarification of the test specimen conditioning requirements.
SATRA TM201:1999 ‘Water and oil repellency – shoe care products’ has been republished as SATRA TM201:2021. This method is used to determine the effect of a shoe care product, such as a polish or spray, on the water and/or oil repellency of a material. It is applicable to shoe care products which make claims with regard to water repellency and/or providing some form of protection against staining by oil. SATRA TM201 can also be used on untreated material which is intended to have a degree of water and/or oil repellency. The revision has clarified the type of products to be tested using this test and incorporates guidance on test specimen conditioning.
The photograph at the top of this page shows the SATRA TM33 ‘Strength perpendicular to needle perforations’ test.
How can we help?
Please contact SATRA’s footwear team (firstname.lastname@example.org) for assistance with these test method revisions or for any other enquiries concerning the assessment of components or whole footwear.
SATRA test methods can now be purchased online. Visit www.satra.com/test_methods to download the current catalogue and to order these documents.
This article was originally published on page 20 of the September 2021 issue of SATRA Bulletin.