ASTM D2062:03(R2021) pdf free download – Standard Test Methods for Operability of Zippers.
19. Signihcance and Use
19.1 The slider should be capable of starting to close the zipper at the separator unit only when the pin is property seated in the retainer. If the slider can close the zipper when the pin is not properly seated, the zipper is pooriy designed or assembled and is subject to failure in the end product.
20. Procedure
20.1 Force to Move Slide’: Pin Fully Sealed—Separate the two stringers of the zipper specimen. Hold the stringer to which the retainer is attached in a vertical position (with the right hand). Place the slider in the normal position abutting the retainer (with the left hand) as shown in Fig. 5. Insert the pin through the slider throat and hold it in the fully -seated position. Attach the force indicator to the pull of the slider as shown in Fig. 5. Apply force to the slider in the closing direction until the slider clears the separable unit. Record the maximum reading on the force indicator to the nearest 0.5 N or 0.1 lhf.
20.2 Slider Movement. Pin Partially Seated—Separate the specimen into its two stringers. Hold the stringer to which the retainer is attached in a vertical position with the right hand. Place the slider in the normal position abutting the retainer. Place a spacer having a thickness equivalent to the element
pitch of the zipper being tested in the bottom of the pin cavity of the retainer. Insert the pin through the throat of the slider and hold it with the left hand in the fully-seated position against the spacer as shown in Fig. 6. Attach the force indicator to the slider pull as shown in Fig. 6. Apply a force not to exceed the amount agreed upon by the purchaser and the seller to the slider in the closing direction. If closing occurs, note and record the maximum force required to the nearest 0.5 N or 0.1 lbf.
20.3 Slider Movement, Pin Not Seated—Separate the two stringers of the specimen. Hold the stringer to which the retainer is attached in a vertical position with the right hand.
Place the slider approsimaicly 50 mm (2 in.) below the retainer a.s shown in Fig. 7. Insert the pin into the throat of the slider until the pin is abutted against the element pitch in the slider. [bid the pin end firmly with the left hand as shown in Fig. 7
and, using the force indicator, apply a force not to exceed the amount agreed upon by the purchaser and the seller to the slider in the closing direction. If closing occurs, record the maximum force required to the nearest 0.5 N or 0.1 Ibl.