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Several common quality issues with cement woven bags
2023/12/1
For enterprises that only engage in laminating bag making and do not engage in production processes such as wire drawing and circular weaving, and use purchased plastic woven fabrics as substrates, strict control must be exercised, and they must never purchase substrates mixed with a large amount of recycled materials, powders, or more than 5% fillers. During the process of weaving plastic woven fabrics into rolls, due to improper tension adjustment, there are varying degrees of creases left on the fabric surface, which can cause the bags covered with film to be subjected to wind pressure impact when filling cement, making them prone to breakage at the creases. To reduce this drawback, a set of crease spreading devices should be installed above the mold before casting and laminating to ensure a smooth fabric surface. The folding process of laminated bag making is a major technological process. Due to the varying widths of the woven fabric, it is prone to tearing at this point when it is too narrow. So the structure of the folding device should be changed to be elastic, which can solve the tearing problem caused by the folding process. Strictly control and inspect the ingredient composition, drawing strength, single filament breaking strength, fabric width, and density of self-produced or purchased plastic woven fabrics. These are crucial issues to ensure the number of bag drops, peel strength, anti-aging degree, bag surface fracture strength, and cost reduction of laminated plastic woven bags. The width and defects of the base fabric of the laminated plastic woven bag must be strictly controlled, otherwise tearing will occur when passing through the folded tire wheel, resulting in a large amount of waste. Strictly control the holes at the folded edge of the base fabric, otherwise a large amount of waste will be generated when passing through the folding device. The base fabric surface must not have oil stains, otherwise it will affect the composite fastness. In the process of laminating and bag making, the design of the extruder, die head, heating ring configuration, and process temperature should be organically combined with the base fabric, heating ring position, laminating material performance, host speed, cutting speed, and temperature instrument accuracy. Only by designing a reasonable process temperature can qualified laminating cement bags be produced and efficiency be improved. Composite resin material is a key material for laminated plastic woven bags, which plays a crucial role in product peel strength and cost. Therefore, it is necessary to choose composite resin materials produced by formal petrochemical enterprises.
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