ASTM D7532-09 (R2021) pdf free download.Standard Practice for Determination of Re-tack Ability of Carpet Adhesives.
1.1 This practice will provide a protocol for determining the effect of extended drying (open time) periods on the shear and peel strength performance of a carpet adhesive when bonding a carpet hacking or standard duck cloth material to a substrate.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
4. Summary of Practice
4. 1 This practice is for a comparison of shear strength and
90 degree peel strength performance between a standard duck cloth material versus a specific carpet backing. Performance testing occurs after an applied test adhesive has been exposed to standard conditions ambient air for various open time periods. It should be noted that the use of duck cloth is necessary since there is no bench mark or standardized carpet backing currently produced in the United States.
5. Significance and Use
5.1 Selection of or development of a carpet adhesive, for direct glue or adhered applications requires knowledge of the adhesive’s ability to perform adequately when it is found necessary to correct an installation concern, such as bubbles or wrinkles, by re-rolling or application of dead weight to the affected area without the application or injection of additional adhesive.
5.2 Adhesive bonding of some carpet backings to substrates and the adhesive bonding of carpet hackings to a pad foundation, double stick or glue application, require that prior to bonding the adhesive is to he dried sufficiently to allow for no transfer of adhesive as a result of slight finger pressure.
6. Apparatus
6.1 Applicator Trowel, with a notch pattern of 3.2 mm (1/8 in.) wide, 2.4 mm (3/32 in.) deep. 3.2 mm (½ in.) flat.
Note 1 —Adhesive manufacturer application instructions may recoin- mend different trowel notching design.
6.2 Six 1 kg (2.2 lb) dead weights.
6.3 Testing Equipment in accordance with the test method to be implemented.
6.4 Timer.ASTM D7532 pdf download.