The main causes and solutions of package warpage and deformation of suction mouth bag
The main reasons for package warping and deformation are as follows: 1. Poor heat resistance of surface substrate film; 2. Improper tension matching control of composite substrate in the process of compounding, which leads to residual stress after aging, especially when the thickness of composite film is thin; 3. The thickness of composite film is inconsistent;. 4. 5. The curing time is not enough; 6. In the longitudinal heat sealing knife part, the running track of the composite film is not straight; 7. The heat sealing temperature is too high or the heat sealing time is too long.
Now that we have known the reasons, we should make corresponding adjustments to avoid unnecessary losses. The following are some countermeasures we have summarized: 1. Re select the surface substrate film, and remember not to be greedy to choose a little knowledge of the substrate; 2. Adjust the tension of each part of the composite processing equipment to make the shrinkage ratio of the two composite substrates equal as much as possible; 3 When compounding, the floating roller tension should be as uniform as possible; 4. Sufficient cooling; 5. The suction nozzle bag should be fully aged, but the material should not be over mature, otherwise it is easy to cause adhesion, which must be well controlled; 6. Select the inner sealing base material with low temperature heat sealing property; 7. Adjust the heat sealing temperature to a suitable temperature.
Packaging materials industry knowledge: types of composite food packaging bags
The combination of several materials can be used to make bags suitable for our needs, such as steam bags, cold bags, vacuum bags, etc. Indeed, in order to make the package, the customer must first ask the manufacturer to produce and package the bag that the manufacturer has said well. The manufacturer only makes different bags with different characteristics for you and corresponding materials according to different packaging products. Different types of food packaging bags can be customized according to customer requirements. The common bag types include three side seal, middle seal organ, side seal, self-supporting bag, etc.
General food packaging bags are made of composite, while common food suction mouth bags have composite types, including:
Two layer composite: PA / PE or PA / rcpp; PET / PE or PET / rcpp
Three layer composites: PET / PA / PE; PET / Al / rcpp; PA / Al / rcpp
Four layer composite: PET / PA / Al/ RCPPhttp://www.ycritai.cn/
Dongguan Beite packaging materials Co., Ltd
Dongguan special bag, plastic bag, plastic bag, plastic bag