Sauce bags are the specific form of soft packaging technology on ketchup packaging. Compared with traditional bottled and canned ketchup, the application of ketchup packaging film bag has greatly improved the portability and convenience of ketchup.
Most of the plastic packaging of the sauce products is broken into bags, and most of the contents are sealed with sauces and other products, and there is no heat sealing. Therefore, the plastic composite packaging for making sauce products should pay special attention to the packaging of sauces and sauce products. In addition to the inner film with strong leakage resistance, it should also be compounded with two-component polyurethane adhesive. Appropriately increase the amount of glue and prolong the curing time of the composite film, so that the oil, salt and spicy substances in the sauce and sauce products are difficult to penetrate the inner membrane. The cured composite layer is re-adhered or penetrates the film to erode the ink layer. This will greatly reduce the delamination of the composite packaging film caused by the composite adhesive and deinking. In addition, it is necessary to improve the tools for filling sauces and sauce products to avoid contamination of the sealing portion of the packaging bag, thereby reducing the failure of the heat sealing to the packaging opening and reducing the breakage rate of the packaging bag.