Requirements of high temperature retort bag materials for film substrates and chemical materials

December 8, 2022

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The following three-dimensional bag manufacturers share with you the requirements of high-temperature retort bag materials for film substrates and chemical materialsThe film material used in the production of high-temperature retort bags is the basis for meeting the retort conditions. Usually, it is necessary to determine which substrates to choose, what specifications, the order of combination, and which type of ink and glue to use according to the retort conditions and the characteristics of the contents of the high-temperature retort bag. Wait.Commonly used film substrates for high-temperature retort bag materials are: BOPET,B0PA,HDPE,RCPP,AL, co-extrusionEVOH, co-extrusionPVDC, co-extrusionPEetc.; there are also new types of co-extruded films with more than five layers such as:PP/AC/EV0H/AC/PP,PP/AC/PA/EV0H/PA/AC/PPetc.; in addition, there are copolymerized nylonMXD6, ceramic evaporation film such asSiOxPET12um, multi-layer co-extruded film and ceramic vapor-deposited film are currently not widely used in high-temperature retort bags due to technical process and price factors.According to the order of the surface layer (or printing layer), barrier layer, and heat-sealing layer, the structure of the composite packaging material can be combined, and there are also single-layer materials that can be used as both the printing layer and the barrier layer, so the retort packaging bag can be designed as two layers, Three, four or more layers, such as:BOPET//RCPP, BOPA//RCPP,BOPET//BOPA//RCPP,BOPET//A1//RCPP,BOPET//A1//BOPA//RCPPWait.The thickness of the base material is usually chosen as:BOPET12um,BOPA15um, AL7umorAL9um,RCPP50um,RCPP70um,RCPP80um,RCPP100umWait,For the barrier layer usually chooseBOPAandAL, there is also a choice according to actual needsBOPA25umandAL12umIn case of high temperature retort bags with large capacity and special requirements are selectedRCPPThickness also exceeds100umof. Equipment packaging bag manufacturers tell you that liquid packaging bags are to overcomeRCPPFor defects that are not resistant to drops, additives are generally added to the film to enhance its anti-drop performance.

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