How to calculate the mass per unit area of the square bottom valve pocket?

At the upper and lower two diagonal corners of any bag, at a distance of 5-8 cm from the edge of the bag, use a sampler to take two circular samples with an area of 0.01 square meters, take the arithmetic mean of the two samples, and then divide Take 0.01 as the mass per unit area of the square bottom valve pocket.

Anhui Tianda Environmental Protection New Material Co., Ltd. mainly produces square bottom valve bags, inner-coated woven bags, outer-coated woven bags, color-printed woven bags, paper-plastic three-in-one bags, flexible container bags, PE bags, FFS film, mesh Eye bags, plastic woven bags, polypropylene raw materials, etc.

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