The coating material has a very important influence on the mobility and peel strength in the process of making potato round flat mesh bags. Therefore, the request to choose the coating material is more severe than that of the wire drawing material. When choosing a coating material, we must first select good mobility, and excellent mobility can form a uniform film and a uniform coating thickness. The target for measuring activity is the melt index M1. Generally speaking, polyethylene is 4-15g/10min, and polypropylene is 7-30g/10min. In addition, stability is also to be considered when choosing the coating material, because the coating is carried out under high temperature conditions, and the extrusion temperature is generally dominated by 290 ℃, which is higher than that of the wire drawing material. When the coating resin melt film is in contact with air, the surface will undergo an oxidation reaction to generate carbonyl groups and add bonding ability.

The inspection process of the appearance quality and stitching of potato round flat mesh bags. The self-employed mesh bag factory specializes in the production and processing of mesh bags, mesh bags, vegetable mesh bags, fruit and vegetable mesh bags, etc. For the quality inspection of vegetable mesh bags, the following points are given Suggest:

1. Measure visually under natural light, and measure the width of the folded (bag) side with a steel ruler accurate to 0.1cm.

2. Color: There should be no obvious difference between the same batch of products.

3. Stain: Obvious pollution is not allowed.

4. Bag edge: no obvious irregular convex and concave.

5. Serial port bag: It should be neat and there is no obvious dislocation of the interval.

6. Broken weft and warp: Each mesh bag is allowed to have 2 non-adjacent ones, but they need to be connected firmly.

7. Needle removal: Not allowed.

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