1. When the package is powder, it should be equipped with a dust removal device; the bag opening system should ensure that the material is not blanked when the bag is not opened; the sealing system should ensure that the empty bag is not sealed.
2. The bagging rate should be no less than 99%. 5.7 The bag opening rate should be not less than 99%. 5.8 The bag loss rate should be no more than 1.5%.
3. The deviation of the net content of the contents of the packaging bag shall comply with the provisions of Table 1, and the average deviation shall not be less than zero.

4. The bag should be flat after sealing, with clear netting, no wrinkles, burning and compression.
5. The heat seal strength of the package (the tensile force that the heat seal can withstand) shall comply with the requirements of Table 2.
6. The thickness of the material described in the table refers to the thickness of the heat sealable material at the seal, such as plastic composite, aluminum-plastic composite, paper-plastic composite, etc. The heat-sealed parts are mostly made of PE or PP materials that are easy to heat-bond. .

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