Bag Body Tape Member Steam Vent Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing steam release mechanisms in cooking bags with weak seals face variability in steam discharge pressure due to uneven bonding strength, leading to inconsistent steam discharge, making it difficult to form a stable steam ventilator.
Innovation Solution
A bag design featuring a tape member with distinct resin compositions in different sections, where the first portion is bonded to both surfaces at one section and only one surface at another, ensuring consistent steam discharge by fixing the discharge section and reducing dependence on machining conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a weak seal is used as a steam release mechanism, then steam can be discharged to prevent bag breakage, but the discharge pressure varies and discharge amount is reduced due to uneven bonding strength
Solution Approach 1:
The tape member is divided into a first section with a first resin composition and a second section with a second resin composition. This segmentation allows each section to have different bonding characteristics, with the second section designed to have lower bonding strength to serve as the steam discharge point, thereby ensuring stable steam discharge independent of overall bonding strength variations
Solution Approach 2:
Different resin compositions are applied to different sections of the tape member. The first section uses a first resin composition with higher bonding strength for structural integrity, while the second section uses a second resin composition with lower bonding strength for steam discharge, creating local quality differences that resolve the contradiction between overall reliability and local bonding uniformity
2Reliability
If the bonding strength of the weak seal is adjusted to control steam discharge, then discharge pressure can be controlled, but machining conditions have significant influence making stable steam ventilator formation difficult
Solution Approach 1:
The invention changes the material parameter (resin composition) rather than adjusting machining conditions to control bonding strength. By selecting resin compositions with inherently different bonding characteristics for the first and second sections, the steam discharge properties are determined by material selection rather than precise machining control, significantly easing manufacturing
Data Source
AI summary
A bag includes: a bag body at least having a first surface and a second surface facing each other with a storing space formed between the first surface and the second surface; and a tape member provided between the first surface and the second surface and defining one side of the storing space. The tape member includes, in a cross section, a first portion formed of a first resin composition and a second portion formed of a second resin composition different from the first resin composition. The first portion is bonded to both the first surface and the second surface at a first section of a longitudinal direction of the tape member while bonded to only the second surface at a second section of the longitudinal direction, and the second portion is bonded to the first surface at the second section.