SATRA releases test method revisions
Four footwear test method revisions have been announced by SATRA.
The first of these amended test methods – SATRA TM108:2020 – ‘Strength of a top-piece attachment’ – has been republished as SATRA TM108:2021 to reflect current policy regarding conditioning requirements. The method is used to determine the force required to detach the top-piece (top-lift) from a shoe heel. For a small top-piece which is moulded around a metal spigot, the method can also be used to assess the strength of attachment of the top-piece to the spigot, regardless of whether or not it is inserted into a heel. It is applicable to all types of top-pieces but particularly plastic types used on raised heels.
Each of the following footwear-related test methods have been revised to ensure that they reflect SATRA’s current procedures and formatting, while improving usability through updated figures and diagrams.
SATRA TM65:2015 – ‘Split tear strength’ has been republished as SATRA TM65:2021. This method is intended to determine the split tear strength of a cellular material and is applicable to sheet soling materials and specimens prepared from moulded soles.
SATRA TM120:2001 – ‘Strength of attachment of straps and nailed or stapled uppers’ has been republished as SATRA TM120:2021. Amendments have also been made to Clause 5 – ‘Preparation of test specimens’ to improve readability and understanding of the procedure involved. This test method is used to determine the strength of attachment of straps, nailed or stapled uppers to the sole of completed footwear. The method is applicable to all footwear with uppers having straps less than 35 mm wide or uppers attached to the sole by means of nails or staples. Where straps are 35 mm or wider, the attachment strength of these should be assessed by measuring their bond strength in accordance with SATRA TM411:2019 – ‘Peel strength of footwear sole bonds’.
SATRA TM408:1992 – ‘adhesion of finish – deadweight method’ has been republished as SATRA TM408:2021. This method is intended to determine the level of adhesion of thin finish layers to their substrate. The method is generally used for finished leather but can also be used with any synthetic material which has a finish applied to its surface.
In addition, SATRA has revised a luggage test method which may be applicable to members producing such products.
SATRA TM248:2007 – ‘Performance of wheel systems – rolling road’ has been republished as SATRA TM248:2021. This revision reflects SATRA’s current procedures and formatting, as well as to improve usability through updated figures and diagrams. This test method is used to determine the resistance of wheeled luggage to abrasion and structural damage during prolonged wheeling and is applicable to all luggage with wheels.
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 10 of the July/August 2021 issue of SATRA Bulletin.