Some questions about KRAFT PAPER POUCH.stand up ziplock kraft paper pouch

　　With the development of the market, the requirements for consumption are becoming more and more diversified, and the KRAFT PAPER POUCH has attracted the attention of many people with its unique shapes and convenience. It is proposed, including leakage, uneven bag shape, asymmetric sealing at the bottom, and size errors.

　　The leakage of KRAFT PAPER POUCH is mainly in two aspects: composite material selection and heat seal strength.

　　1. Material selection

　　The selection of materials has a great impact on the quality of KRAFT PAPER POUCH. The appropriate material can ensure that the heat sealing strength of the KRAFT PAPER POUCH and the peeling strength between the material layer to ensure that the KRAFT PAPER POUCH is not damaged. Therefore The surface tension must be greater than 38DYN/CM; the low temperature thermal sealing performance of the inner heat -seal film must be better, and the surface tension of the thermal set must be less than 34DYN/CM; in addition, you should also choose a well -connected ink, a high -solid content and a low viscosity bonding bonding bonding. Organic solvents with high purity and purity.

　　2. Hot seal intensity

　　The low heat sealed strength is also the reason why KRAFT PAPER POUCH leaks. The heat sealed strength is low. The heat seal may be separated in the external environment, resulting in leakage.

　　Therefore, the heat seal temperature and pressure should be set according to the characteristics of the KRAFT PAPER POUCH material. After the heat seal, the leakage test should be performed. The simple and practical method is to charge a certain amount of air in the bag, the hot bag mouth, put it in the water in the water, put it in the water. In the pot, squeeze the different parts of the bag with your hands. If there is no bubbles, it means that the bag has a good sealing performance. Time must be determined by sufficient test verification.

　　Nutbag manufacturer: The shape of the bag is uneven

　　Smoothing is one of the indicators to measure the appearance quality of the packaging bag. In addition to material factors, the flatness of KRAFT PAPER POUCH is also related to the heat sealed temperature, thermal sealed pressure, thermal sealing time, and cooling effect. Excessive heat sealed pressure and too long thermal sealing time will cause composite membrane to shrink and deform. Inadequate cooling will cause insufficient formation after the heat sealing, will not eliminate the internal stress, and wrinkle the bag. Therefore, the process parameters should be adjusted, and the cooling water circulation should The system should work normally.

　　Nutbag manufacturer: poor symmetry

　　The poor symmetry will not only affect the beauty of the package, but also affect the thermal performance and stability. The main reasons for the poor symmetry of KRAFT PAPER POUCH are uneven thickness of the composite membrane, folds, excessive tension of double float rollers, improper control of the base tension, and some of them. Rolling rotation is unstable, so it should take targeted solutions to avoid it.

　　Nutbag manufacturer: size error

　　KRAFT PAPER POUCH size error is one of the common problems in production. The size error will affect customer satisfaction and even cause returns. Operating factors such as film rubber roller pressure cylinder tension and insufficient pressure settings and other operating factors

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