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Production process of woven bag manufacturers

2020-07-08

Woven bag, also known as flexible container (or called ton bag, ton bag, ton bag, ton bag, etc.) is a flexible transport packaging container. It has the advantages of moisture-proof, dust-proof, radiation-resistant and safe, and has sufficient degree in structure. Since the loading and unloading and handling of woven bags are very convenient, the loading and unloading efficiency has been significantly improved, and it has developed rapidly in recent years. Woven bag manufacturers generally use polyester fibers such as polypropylene and fillers to weave. It can be widely used in the packaging of chemical, cement, grain, mineral products and other powdery, granular and blocky articles, and is an ideal product for storage, transportation and other industries.

PolypropyleneEnglish name: Polypropylene, a thermoplastic resin made from the polymerization of propylene. Abbreviated as PP, it is a crystalline polymer. PP is the lightest among the commonly used plastics, with a density of only 0.91g/cm3 (smaller than water). Among general-purpose plastics, PP has the best heat resistance, its heat distortion temperature is 80-100℃, and it can be cooked in boiling water. PP has good resistance to stress cracking, and has a high bending fatigue life, commonly known as "100% plastic". The overall performance of pp is better than PE material. PP products are light in weight, good in toughness and good in chemical resistance. Disadvantages of PP: low dimensional accuracy, insufficient rigidity, and poor weather resistance. It has a post-shrinkage phenomenon. After demoulding, it is easy to age, become brittle, and deformed. PPR (pentatricopeptide repeats), also known as random copolymer polypropylene (PPR), has good toughness, high strength, excellent processing performance, good creep resistance at higher temperatures, and has the unique high transparency of random copolymer polypropylene The advantages can be widely used in the production of pipes, sheets, daily necessities, packaging materials, household appliance parts and various films.

编织袋厂家的生产工艺

1. Crop

1: The cutting specifications and dimensions must be cut according to the requirements of the production process sheet, and the length tolerance is<>

2: The cut section should not be skewed, the allowable deviation<>

3: The quantity of each bundle must be accurate and the allowable deviation<>

4: The position of the line should be accurate according to the requirements of the craft bill.

5: The defective rate is not allowed to exceed 5%0.

6: The cut semi-finished products must be kept clean and no dust is allowed.

2. Seam

1: Specification: allowable deviation below 1000mm ± 10mm, above 1000mm ± 15mm.

2: Appearance: sewing needs to be straight, without needle removal, broken needle, no floating thread, hanging needle, no less than 30mm return distance when starting and falling, the woven bag should be straight and straight, and there should be no obvious lack of menstruation Shaowei, there must be no obvious defects, the printed pattern is clear and the position is correct.

3: Lifting rings: The lengths of lifting rings, suspenders and lifting lugs should be the same as required, and the overlap should be even and straight.

4: Stitch: More than two stitches are required for woven bag manufacturers. It is strictly forbidden to overlap and press together. The distance between rows is 2-4mm. The reinforcing cloth connecting the sling and the bag body has a 10mm seam from the side, horizontal and vertical, and other parts are sutured strictly according to the requirements. The basic standard of the needle code 10cm requires 9-12 needles (specifically according to the size of the needle code required by the user).

5: Hygiene: Wire head, hair, dust, stains, oil spots, debris, etc. are strictly prohibited inside and outside the bag.


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