From Dialysis Paper to Laminated Film: Inside Sterile Paper-Plastic Packaging Bag Production

How exactly are sterile paper-plastic packaging bags manufactured?

The following breakdown follows the production route step by step.

Start with the bag structure: it consists of a top film and a base paper.

The defining feature is a ring of water-based adhesive applied around the rear four-sided frame of the base paper; the base paper and top film are then heat-sealed where the adhesive sits on the paper's back, creating the sterile paper-plastic packaging bag. The manufacturing steps are as follows.

First, depending on customer requirements, imported dialysis paper or *-grade Chinese dialysis paper is selected, and blank dialysis paper is printed and laid out to the customer's design.

Second, the self-developed fourth-generation

CPP/PET is laminated using *-quality film raw materials.

Third, the printed paper and film are cut to the installation dimensions of the slitting machine.

Fourth, in a Class 100,000 clean workshop, a bag-making machine converts the dialysis paper and laminated film into laminated pouches along the adhesive-coated areas at 130°C ~ 200°C and 60 m ~ 100/min. After overlapping, the three sides are heat-fused and pressed to produce a medical packaging pouch, forming a medical sterile packaging pouch.

These sterile paper-plastic packaging pouches use microwave heat sealing, giving the sealed edge high tensile strength and good uniformity. At the same time, French imported dialysis paper and laminated film help avoid bag bursting during use and sterilization. Because the sealed edge is transparent, users can visually check for false sealing across the whole pouch before use, enabling an intuitive assessment of key indicators prior to product use.

The sterile paper-plastic packaging pouch also delivers environmental benefits: non-toxic, odorless and free of paper dust

; applying a ring of adhesive on the back of the top paper saves production costs; and using a flexographic press to complete printing and adhesive application in reverse synchrony reduces process steps and raises production efficiency. The company behind this process is a professional medical device and pharmaceutical packaging manufacturer integrating R&D, production and sales.

——This article is reprinted from China Packaging Network (pack.cn). Original link: http://news.pack.cn/show-379025.html