Zipper Reciprocating Tester

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Zipper reciprocating tester measures zipper performance in products like clothes and bags. It makes the zipper reciprocate at a constant speed (default 30 times/min, customizable from 20 to 40 times/min) under tension to test fatigue and durability. The tester has a 75 mm stroke, specific clamp widths, a 60° clamping angle, and tests zippers sized 3.5-12mm.

Application

The instrument is widely used to evaluate the durability and service life of zippers with various length in the fields of clothing accessories, luggage industry, shoe materials, etc., and provides data basis for guiding the development of materials and helping users to effectively evaluate the performance of the products. The test result can predict the service life span of zippers that reciprocate by the vertical and horizontal tension in actual use process. Adjustable test spacing can meet more test requirements. Knob-type clamp with standard tooth surface can quickly and accurately hold the sample, with automatic counting function, convenient and quick.

Standards

QB/T 2171/2172/2173:Light industry standards: metallic zipper/plastic zipper/nylon zipper

BS 3084:British standards: Slide fasteners (Zips) specification

AS 2332:Australian standards: zipper

NF G91-005:Slide fasteners. Test methods. Determination of mechanical properties.

JIS S3015:Slide fasteners

DIN 3419-1:Slide fasteners - Part 1: Technical delivery conditions

SATRA TM50:slide fasteners repeated opening closing, under load

Features

1. The counter adopts LCD display, 0~ 999.999 continuous adjustable;

2. Adjust zipper stroke according to different standard;

3. Automatic stop and alarm for 10S upon reaching the set number of times;

5. One set each of specially manufactured large and small zipper head fixtures, for the convenience to used zipper heads in different specification.

6. The positioning block ensures that the transverse pull clamp maintains tranversely tight at 10° at the beginning of clamping.

7.It has point adjustment function and fine tuning handwheel to facilitate the adjustion of installation position;

8.The zipper clamp is made of stainless steel

Technical Parameters

Items	Parameters
Reciprocating speed	30 double times/min
Reciprocating stoke	75mm
Horizontal clamping device width	25mm
Vertical clamping device width	10mm
Two clamping device distance	6.35mm
Friction head size	20mm*20mm
Surface friction head	Dead weight:200g
Round-trip distance	Low load 120mm; High load 150mm

Test Procedures

1. Roughly fix the zipper end (bottom stop) to point A (pull tab facing inwards);

2. Fix the pull tab to the pull tab clamp;

3. Fix the zipper front end (top stop) to points D and E;

4. Loosen point A, pull the zipper end upwards so that the fixing pin falls into the middle of the balance plate hole, then clamp point A (at this point, visually check that points D and E are on the same horizontal line);

5. Loosen the horizontal clamps B and C, allowing the fabric tape on both sides of the zipper to be placed into clamps B and C and clamped, with the clamp opening approximately 5mm from the tooth. At this point, all five fixing points are secured;

6. Adjust the zipper tester to its upper limit, loosen the pull tab clamp, and visually check if the zipper remains straight. If not, readjust until all clamping is complete;

7. For zippers of different specifications, apply load to their horizontal and vertical directions according to the specified requirements.

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