How to determine lamination Velcro quality stand or fall?

by:BAILI     2020-10-10
How to identify different back glue Velcro material? Will have to march, the rainy season, the back glue Velcro moistureproof do you have any tips? Answers these questions, small make up one by one for you. , how to judge the back glue hook and loop quality stand or fall of 1, the pollution level: can be observed by the naked eye directly back glue magic with no uneven dyeing, stains or oil dirty things such as attached. 2, the color difference: look at the back glue Velcro color is pure, with and without grain volume with needle, whether or not mixed and disorderly, etc. 3, with and without flash: both sides of the back glue Velcro and overlock did see the bulb or hair silk, etc. 4, jump needle: can you look at the back glue with no magic needle jumping phenomenon. 5, use a ruler measurement: measure thickness and width and compared with standard products, as long as in the range of allowable error is classy article, if this error is greater than that belongs to the work is not fine. Second, the back glue Velcro combustion identification methods are commonly used materials back glue hook and loop quality and variety of important method is the combustion method. Cotton: almost immediately flame combustion, burn faster, more grey, burning after the process black and gray; MAO: melt away from fire, and burn, difficult to continue burning, self-extinguishing, after burning in black; Silk: sometimes sibilance, difficult to continue burning, self-extinguishing, and splash when burning, burning after appear black; Ma: nearly flame is burning, burning crackle, continue burning smoke light; Viscose: nearly flame is burning, burning ash continue burning fast in everything in a glance, burn with chemical taste; Polyamide fiber: near flame namely shrinkage, melting, dripping and sparkling, not direct combustion, celery flavour. Three, back glue Velcro moisture-proof coup moistureproof for textile industry is particularly important, once be affected with damp be affected with damp will trigger items mildew, cause pitting fabric yellowing, unable to sell. Don't let the items are in danger of be affected with damp be affected with damp, the most important prevention is the key. When struck the humid weather, be sure to close each of the Windows of the warehouse, especially the window facing south. With the help of some technology, the use of desiccant to reduce indoor air humidity, but this method is effective. In the back glue Velcro warehouse to hang some desiccant, can go to the supermarket to buy dedicated to moistureproof desiccant dehumidification. Buy back glue hook and loop moistureproof ark, put in safe, but the general cost is quite high.
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