Factors affecting the quality of foil aluminum bags
Release time:
2022-03-03
The foil aluminum bags has a metallic luster, and the printing color is exquisite and bright, the isolation is good, the protection is strong, and it is airtight and watertight.
The foil aluminum bags has a metallic luster, and the printing color is exquisite and bright, the isolation is good, the protection is strong, and it is airtight and watertight. These properties cannot be guaranteed. So what factors will affect the quality of the product in the production process?
1. Heat sealing time. The standard heat-sealing time is 1s, and the length of the heat-sealing time will affect the strength of the heat-sealing. For example, under the same heat-sealing temperature and pressure, the heat-sealing time can make the heat-sealing part more firm and perfect to achieve the expected heat. Seal strength. If the heat sealing time is too short, the heat sealing between the adhesive layer and the PVC film will not be enough, which will lead to defective product quality.
2. Production process. Workshop operators should strictly abide by the process parameters when using adhesive to coat the surface of the original aluminum foil. The quality of the coating film will directly affect the heat sealing strength of the product, such as too fast coating speed, too high drying temperature, and solvent on the surface of the coating film. Too fast volatilization will result in residual solvent in the coating film and insufficient drying of the coating film, thereby affecting the heat sealing strength of the aluminum foil bag.
3. Adhesive. The adhesive plays a decisive role in the hot air strength of the product. The adhesive contains a special solvent substance, and the adhesive is coated on the negative side of the aluminum foil and dried in the oven to form an adhesive layer, so the choice of the adhesive is also very important.
4. Control heat sealing. High temperature volatilizes the solvent too quickly, resulting in residual solvent in the film and insufficient drying of the film. Low temperature will make it difficult to combine the adhesive layer with the PVC film.
5. Raw materials. In terms of raw materials, aluminum foil is used to combine with the carrier, and its quality will directly affect the heat sealing strength of the product. There is no possibility of oil on the surface of the aluminum foil, which will affect and weaken the adhesion between the adhesive and the aluminum foil. The metal composition and surface of the aluminum foil are not smooth enough, which will also have a great impact on the quality.
6. Heat sealing pressure. The standard heat sealing pressure is 0.20.2×10pa. If the heat sealing pressure is not enough, the foil aluminum bags adhesive layer cannot be completely attached to the PVC film, and a good heat sealing effect cannot be obtained.
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