Food packaging bags for microwave use

JP2026105626APending Publication Date: 2026-06-26KANAOKA HLDG CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
KANAOKA HLDG CO LTD
Filing Date
2024-12-16
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing microwaveable food packaging bags face issues of increased manufacturing costs due to pressure relief mechanisms and risk of food spillage when containing finely chopped foods like rice, as they either require additional components or release steam through openings that allow food to escape.

Method used

A microwaveable food packaging bag with laminated films having a heat-resistant base layer and seal layer, featuring a weak adhesive section and steam vents 1-10 mm wide, which delaminate to allow steam escape without compromising the bag's integrity, and using low-density polyethylene film for easy tearing.

Benefits of technology

Prevents bag rupture and food spillage by allowing steam to escape through controlled vents, maintaining bag integrity and preventing finely chopped foods from spilling, while reducing manufacturing costs by eliminating the need for additional components.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure 2026105626000001_ABST
    Figure 2026105626000001_ABST
Patent Text Reader

Abstract

This prevents the contents from spilling out and prevents the bag from bursting when the food inside is heated in a microwave oven. [Solution] A microwaveable food packaging bag is made by folding a laminated film of two or more layers, each having at least a heat-resistant base layer P1 and a sealing layer P2, into a cylindrical shape with the center of the back-sealed portion S of the bag body being a grommet portion 1, heat-sealing the opposing films at the grommet portion, heat-sealing the ends of the opposing films at one open end of the cylinder to form the bag, then placing food inside and heat-sealing the ends of the opposing films at the other open end to seal it. In this packaging bag, a weak adhesive portion 5 of any width is provided between the layers of the laminated film on one side of the grommet portion of the back-sealed portion to weaken the interlayer strength, and one or more steam vents 6 consisting of cuts 1 to 10 mm wide are provided at the location where the weak adhesive portion of the laminated film on one side of the grommet portion of the back-sealed portion is located.
Need to check novelty before this filing date? Find Prior Art