Introduction to the test standard of the zipper reciprocating pull test machine

The Zipper Reciprocating Pulling Tester is a special instrument used to test the strength of various zippers. Under the action of horizontal and vertical tension, the instrument can withstand a specified number of reciprocating pulling operations. During the test, the machine drives the slider of the zipper at a constant speed. , do 30 reciprocating movements per minute until the specified number of times. At present, the main global zipper test standards are as follows: China, QB/T 2171-2014 Metal zipper QB/T 2172-2014 Injection zipper QB/T 2173-2014 Nylon zipper Japan, JIS S 3015-2007 Japanese zipper standard UK, BS 3084 -2006 British zipper standard Australia, AS 2332-2003 Australian zipper standard USA, ASTM D2061-2007 zipper strength standard test ASTM D2062-03(2009) zipper working performance standard test method Test Methods ASTM D2052-2005 Standard Test Method for Color Fastness of Zippers to Dry Cleaning ASTM D2053-2004 Standard Test Method for Color Fastness of Zippers to Light Standard Test Method for Color Fastness ASTM D2058-03(2009) Standard Test Method for Abrasion Resistance of Dry Cleaning Coatings ASTM D2059-2003 Standard Test Method for Zipper Resistance to Salt Spray Corrosion Force) torsional strength reference standard QB/T 2171-2014, pull-tab torsional moment QB/T 2171-2014ASTM D2061ASTM D2061BS 3084DIN 3419 test method Take a finished slider and clamp it in a fixture (see the picture above). Start the tester and test until the pull tab or the slider body is damaged. The strength value at this time is the pull tab binding strength of the slider body. The slider body of the slider is placed in a fixed fixture and clamped, and then the pull tab is clamped in a clamp that can rotate vertically with the slider body, and the clamp is clamped at the midpoint of the pull tab. Start the test instrument until the pull tab is twisted or damaged relative to the slider body, and the torque value at this time is the torsion resistance of the pull tab. No. ③ ④ ⑤ Test item Tensile Strength Self-locking Strength Flat Pull Strength Reference Standard QB/T 2171-2014QB/T 2171-2014QB/T 2171-2014ASTM D2061ASTM D2061ASTM D2061BS 3084BS 3084 The head engaging port is caught on the upper and lower jaws. b) Adjust the position of the upper and lower jaws to a reasonable test state. c) Start the test device, start the test and stop working when the deformation is 0.5mm. The test value recorded at this time is the tensile strength of the slider. Take a section of the zipper sample with a self-locking slider longer than 100mm, pull the slider to the middle position, clamp the fasteners on both sides of the split end on the upper and lower clamps, the distance between the clamps is about 75mm, start the tester, and test until the slider slips or the zipper is damaged. , the strength value at this time is the self-locking strength of the slider. Take a section of zipper sample with a length of more than 75mm, and clamp it in the above-mentioned fixture. When clamping, align the foot of the fastener element with the jaw part of the fixture (see the figure above). Start the tester and test until the tooth is lost or the tape is damaged, and the value displayed at this time is the flat tensile strength value. No. ⑥ ⑦ Test item Single-tooth displacement strength Flat pull strength reference standard QB/T 2171-2014DIN 3419ASTM D2061ASTM D2061 test method a) Take a section of zipper sample with a length greater than 50mm and cut it. Separate the two chain fasteners, remove the two fasteners from the shearing place, and leave the third tooth, which is clamped to the above-mentioned fixture. When clamping, the first tooth after removing the two teeth is buckled into the upper clamp, and the other end is clamped to the lower clamp. Note: When removing the fastener elements, the ribs must not be damaged, and the adjacent fastener elements must not be touched. b) Start the tester and test until the tooth comes out. The force value at this time is the displacement force of a single tooth of the zipper. Take any piece of unilateral dental chain, then fix the caliper on the testing machine, adjust the caliper, clamp one of the teeth on the dental chain, and then clamp the dental chain with the lower clamp. Turn on the tester until the fastener elements are detached from the chain or otherwise damaged. The maximum tensile force recorded at this time is the single-tooth flat tensile strength.

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