Matters needing attention in food soft packaging
2025,07,11
Food flexible packaging is widely used in modern food industry because of its advantages of portability, low cost, easy processing and transportation. However, in order to ensure food safety, extend the shelf life and meet the needs of consumers, the following key points should be paid attention to when using soft packaging.
1. Choose the right packaging materials
There are many kinds of soft packaging materials, such as plastics (such as PE, PP, PET), aluminum foil and composite film. Different foods have different packaging requirements, such as:
High-fat foods (such as potato chips and nuts) need to use materials with strong oxygen resistance (such as aluminum foil composite film) to prevent oxidation and deterioration.
Liquid foods (such as milk and fruit juice) should be packed with puncture-resistant and leak-proof packaging (such as multi-layer co-extrusion film).
Frozen food needs to use low temperature resistant and frost crack resistant materials (such as PA/PE composite film).
2. Ensure the tightness of the package.
The tightness of soft packaging directly affects the shelf life and safety of food. Note:
Heat sealing process: temperature, pressure and time should be accurately controlled to avoid material deformation caused by lax sealing or excessive heat sealing.
Testing the tightness: vacuum leak detection, water bath test and other methods can be used to ensure no air leakage or leakage.
3. Pay attention to food safety and compliance
Packaging materials must meet the national food safety standards to avoid the migration of harmful substances. For example:
Use food-grade materials conforming to GB 4806 series standards.
Avoid packaging containing plasticizer (such as DEHP) or bisphenol A(BPA), especially infant food.
Non-toxic and low-migration water-based ink should be selected for printing ink to prevent food contamination.
4. Consider environmental protection and sustainable development
With the improvement of environmental protection requirements, flexible packaging needs to give consideration to both functionality and recyclability;
Degradable materials (such as PLA and PBAT) or single material packaging (such as pure PP film) are preferred to facilitate recycling.
Reduce excessive packaging and optimize design to reduce waste.
5. Storage and transportation conditions
The temperature resistance and pressure resistance of flexible packaging should adapt to the actual circulation environment;
Avoid direct sunlight and prevent ultraviolet rays from accelerating the aging of materials.
High temperature and high humidity environment may affect the packaging performance, so it is necessary to strengthen moisture-proof and mildew-proof measures.
6. Consumer convenience
Packaging design should enhance the user experience, such as:
The structure of easy tearing, zipper sealing or repeatable sealing is added.
Clearly mark the storage method after opening (such as "cold storage" and "eat as soon as possible").
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Reasonable selection and use of food soft packaging can not only ensure food safety, extend shelf life, but also enhance brand image. Enterprises should combine product characteristics, regulatory requirements and environmental protection trends, scientifically optimize the packaging scheme, and provide consumers with a safe and convenient product experience.
