Abstract：This article introduces the key points of the process of using a solvent-free composite aluminum high-temperature retort pouch,and points out the advantages of solvent-free composite.
The solvent-free process combines multiple advantages such as environmental protection and cost, and has gradually replaced dry composite in many application fields. However, many companies are hesitant to try composite high-temperature cooking products, especially those with aluminum foil structures.Because many people are concerned about the risks of using solvent-free composite products: can they withstand high temperature cooking? Will it be layered? What is the peel strength? Will attenuation be too fast? How stable is it?
These are the key points of using solvent-free composite aluminum foil high-temperature products, and this article will explore these issues one by one.
1、 Common structures and qualification standards for high-temperature cooking products
At present, based on user requirements, types of contents, and circulation forms, the product structure of high-temperature cooking bags is generally divided into three categories: two-layer membrane, three-layer membrane, and four layer membrane structure. The two-layer membrane structure is generally BOPA/RCPP, PET/RCPP; The three-layer membrane structure is PET/AL/RCPP, BOPA/AL/RCPP; The four layer membrane structure is PET/BOPA/AL/RCPP or PET/AL/BOPA/RCPP.
We know the structure of a cooking bag, how do we evaluate whether a cooking bag product is qualified?
From the perspective of industry requirements and packaged products, it is generally judged from the following aspects：
1.1、Cooking resistance: generally refers to several levels of resistance, such as boiling at 100 ° C, 121 ° C, and high-temperature cooking at 135 ° C for 30-40 minutes. However, there are also some manufacturers who require other temperatures;
1.2、What is the peel strength；
1.3、Aging resistance; Generally, the experiment is conducted in a 60 ° C or 80 ° C oven, and the peel strength is measured after 7 days of drying
1.4、At present, there are many customer products that do not need cooking, but the enterprise considers the factors of packaging contents, such as 75% alcohol disinfectant wipes, laundry detergent, facial mask bags containing essence liquid and other products are also produced with high-temperature cooking glue.
2、Cost comparison
2.1、The cost of solvent-free composite is 0.15 yuan per square meter less than that of dry composite. If calculated based on the annual production of 10 million square meters of high-temperature cooking products by a packaging enterprise, it can save adhesive costs by 1.5 million yuan per year, which is a considerable income.
3、Other advantages
In addition to cost, solvent-free composites also have the following advantages：Whether in terms of VOCs emissions, energy consumption, efficiency, or production losses, solvent-free composites have great advantages, especially with the increasing environmental awareness of the people, solvent emissions can be reduced
Conclusion
Based on the above analysis, the solvent-free composite high-temperature cooking inner layer structure can fully meet the needs of the vast majority of products in the market, and is superior to dry composite in terms of usage cost, VOC emissions, efficiency, and other aspects. At present, solvent-free composite has been officially put into use in the market in 2013. Based on market feedback in the past 10 years, it has been widely used in various braised foods, snack foods, daily chemicals, and heavy packaging.
Post time: Nov-28-2023