The reason and solution of the fragile heat sealing part of vacuum food packaging bag
1. Causes: the heat sealing pressure is too large, the heat sealing time is too long or the heat sealing temperature is too high, and the edge of the heat sealing line is squeezed thin. Solution: adjust the pressure, temperature and time to appropriate.
2. Cause: poor film strength. Solution: 1. Choose the film with good strength. ② Blown film can be selected for the inner film of the composite bag, because the strength of the blown film is better than that of the tape casting film. ③ For the composite bag used for cooking, the thickness of the inner film should not be less than 0.07mm. 3. Reason: the heat sealing line is forced when it is not cooled. Solution: avoid lengthening or thinning of heat sealing line. 4. Cause: the heat sealing temperature is too low. Solution: 1. Increase the heat sealing temperature. ② Increase the heat sealing time. 5. Cause: the heat sealing pressure is too low. Solution: increase the heat sealing pressure.
Packaging bag knowledge: the composition, performance and use of common food packaging bag composite packaging materials are as follows
Rice snacks: moisture resistance, oil resistance, cold resistance and bag breaking resistance are required; examples of composite films: KPT / PE, OPP / CPP, OPP / PE. (food aluminum foil bag)
Instant noodles: moisture resistance, oxygen resistance, mechanical packaging adaptability, insect resistance, aroma retention; (high temperature cooking bag)
Example of composite membrane: Pt / PE fast food: gas barrier and anticorrosion are required;
Examples of composite membrane: KPT / OPP, PVDC / OPP, KPT / PE / BOPP juice powder: moisture resistance and oxygen resistance are required;
Examples of composite membrane: PRT / PE, KPT / PE, PET / Al / PE, PET / PVDC / PE soybean paste: mildew proof, gas barrier, hot water sterilization resistance are required; examples of composite membrane: on / PVDC / PE, ony / Eval / PE sauces: vacuum degassing, pinhole resistance and antistatic property are required;
Composite film example: OPP / PE, PET / PE laundry liquid packaging bag: required moisture resistance, oxygen resistance;
Examples of composite film: coated with PVDC cellophane / Al / PE ham and sausage: gas barrier, moisture resistance and vacuum gas filling snack bag are required;
Examples of composite films: coated with PVDC cellophane / pepet / PE, PVDC / PET / PE, PVDC / PP / PE tea vacuum bags: moisture resistance, light shielding, gas barrier, fragrance retention, and pinhole resistance are required;
Examples of composite membrane: OPP / Al / PE, PET / PE / paper / Al / PE condiments: gas barrier, aroma retention and oil resistance are required;
Composite film example: NY / PE, PVDC / PET / PE frozen food packaging bags: low temperature sealing and oil resistance are required;
Examples of composite film: PA / PE, PET / PE, NY / PE steam sterilization food: long term preservation, heat resistance of 125 ℃; http://www.dgbpk.com/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag