新闻资讯

新闻资讯

current position: Home > News Center > Industry News

contact usContact Us

Jiangsu Great Packing Co., Ltd

Contact: Manager Wei

Phone: 0518-85269868

Mobile phone: 18661259291

WeChat: 18661259291

Email: jsgdbz@163.com

website: www.jsgdbz.com

Address: No. 6 Puxi Road, Xinpu Economic Development Zone, Haizhou District, Lianyungang City, Jiangsu Province

How to control the breathability of aluminum foil steaming bags?

2025-03-28 11:46:02
times

The air permeability control of aluminum foil steaming bags needs to be comprehensively controlled from multiple aspects such as material selection, composite process, and testing standards. The specific methods are as follows:

Quality control of aluminum foil materials

Pinhole control: The number and aperture of pinholes in aluminum foil directly affect its barrier properties. The number of pinholes in 7 μ m thick aluminum foil should be less than 200 per square meter, and the number of pinholes in 9 μ m thick aluminum foil should be less than 100 per square meter, with a pore size of ≤ 20 μ m

High purity aluminum raw materials (purity>99.5%) and clean production environment can reduce the occurrence of pinholes.

Thickness and cleanliness: recommended thickness of 7-9 μ m, thickness deviation ≤ 7%

The surface needs to achieve A/B level cleanliness and pass the distilled water immersion test (with no oil residue).

  • 蒸煮袋厂家

Composite process optimization

Adhesive selection: High temperature resistant two-component polyurethane adhesive should be used to ensure compatibility with aluminum foil and other substrates (such as PET, CPP), avoiding interface delamination due to incompatibility.

Glue application amount and curing: The glue application amount should be ≥ 4g/m ², and the curing time should be ≥ 72 hours to eliminate internal stress and enhance composite strength.

Production process parameters

Annealing process: The temperature (250~400 ℃) and time (10~80 hours) of the finished product annealing need to be strictly controlled to ensure the flexibility and surface oil removal effect of the aluminum foil.

Heat sealing layer material: The heat sealing layer adopts RCPP or SCPP film (thickness ≥ 60 μ m), and its shrinkage rate is controlled (longitudinal/transverse ≤ 1.5%).

Testing and Standards

Evaluate packaging performance through air permeability testing (such as ISO standards) and select air permeability levels (general/advanced/special) based on product requirements.

Verify the composite peel strength (e.g. PET/AL must be ≥ 4.5N/15mm) and high temperature resistance (e.g. no delamination after cooking at 121 ℃).


In summary, the air permeability control of aluminum foil steaming bags needs to be strictly controlled throughout the entire process from source materials, process parameters to finished product testing to ensure barrier performance and packaging safety.

Recently Viewed:

Related news

  • menu
National Service Hotline

0518-85269868

  • WeChat QR

    WeChat QR

  • Mobile QR

    Mobile QR

  • Jiangsu Great Packing Co., Ltd

    Mobile phone: 18661259291

    Mobile phone: 18036689109

    Email: jsgdbz@163.com

    Address: No. 6 Puxi Road, Xinpu Economic Development Zone,
    Haizhou District, Lianyungang City, Jiangsu Province


    #
    在线客服

    x