What are the standards for leno mesh bag?

leno mesh bag is mainly made of polyethylene as the main raw material, through the extrusion, stretching into flat silk, and then woven into the pp mesh bag. This kind of bag can be used for the packaging of vegetables, fruits and other items, do you know how to judge its use standard?

Appearance quality

Requirements

Color: There should be no obvious difference between products of the same batch.
Stain: no obvious contamination is allowed.
Edge of the bag: no obvious irregular bumps and dents.
String pocket: should be neat, no obvious misalignment at intervals.
Broken weft and warp: each mesh bag is allowed to have 2 non-adjacent, but need to be firmly connected.
Stitching: Not allowed.

Stitching

Flat woven mesh bag, bag edge, bottom stitching, generally using the flat stitch method or chain link method, the raw edge folded for 2 folds, folded edge width greater than or equal to 1.3cm. Flat stitch stitching two basic parallel, respectively, from the folded edge of the inner and outer edges of the 1/3. Folded edge of the width of the needle, no skipped stitches, floating lines and not playing the reverse back to the needle. One chain link method stitch, located in the middle of the folded edge, no skipped stitches, floating threads.
Warp knitting mesh bag side, bottom in the weaving bag at the same time knitting, knitting edge cutting using hot melt knife cutting, no loose edge phenomenon, the bottom of the bag is single knitting or double knitting, the width of the edge of the bag 2.3 ± 1cm.

Testing method: Visual inspection under natural light, the width of the folded (bag) edge is measured by a steel ruler accurate to 0.1cm.

Tensile strength

Test conditions: the test machine composite GB/T1040 provisions, at 23 ± 2 ℃ for more than 4h conditioning.
Test procedure: the specimen will be clamped in the tension machine fixture (warp knitting type mesh bag specimen should be folded into the width of 50mm), the fixture spacing is 200mm, the test machine no-load speed of 200mm/min.
Record the maximum load of the specimen in the tensile process, the test results take the arithmetic average of 5 specimens.