Multi-Layer Bag Partial Non-Adhesion Zones
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Large industrial multi-layer bag packages are prone to tearing during handling and stacking due to internal air pressure, leading to product loss and compromised tightness.
Innovation Solution
A multilayer bag package formed from a continuous tubular element with a heat-sealable inner layer, an intermediate layer, and an outer layer, featuring partial non-adhesion zones between the inner and intermediate layers to enhance puncture resistance and prevent air ingress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the bag is filled with product, then the package contains the product, but air inside the bag causes tearing under squeezing pressure during handling and stacking
Solution Approach 1:
The web is segmented into distinct adhesion and non-adhesion areas, creating a patterned structure where the inner layer adheres to the intermediate layer in adhesion areas but remains separated in non-adhesion areas. This segmentation allows the package to contain product while the non-adhesion areas provide tear propagation barriers that prevent catastrophic failure under squeezing pressure.
Solution Approach 2:
The package structure varies locally across different areas of the web. Adhesion areas provide structural integrity and sealing, while non-adhesion areas provide tear resistance. This local differentiation of properties allows the same web to simultaneously achieve product containment and tear resistance in different locations.
2Loss of substance
If the package is torn, then product loss occurs, but partial non-adhesion zones can stop tear propagation
Solution Approach 1:
The web is divided into adhesion and non-adhesion segments that act as tear propagation barriers. When a tear encounters a non-adhesion area, the lack of bonding between the inner and intermediate layers stops the tear from propagating further, thereby limiting product loss while maintaining overall structural strength through the adhesion areas.
3Object-affected harmful factors
If air enters the enclosure through outer edges, then tightness is compromised, but non-adhesion areas prevent air ingress
Solution Approach 1:
The web exhibits local quality variations where non-adhesion areas create air barriers that prevent ingress through the edges, while adhesion areas maintain the hermetic sealing. This localized differentiation allows the package to resist harmful air penetration while preserving overall tightness through the sealed adhesion regions.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The partial non-adhesion zones increase tear resistance, limit tear propagation, and maintain package tightness by preventing air entry, thereby reducing product loss and ensuring the package remains sealed.
Implementation Method 1
an inner layer made of a heat-sealable material adapted to contact the products to be stored
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A multilayer bag package (1) is formed from a tubular element (100) defined by a continuous web (101) of a multilayer material, the web (101) extends in a longitudinal direction (A) and has a longitudinal sealing area (9) substantially parallel to the longitudinal direction (A); the web (101) comprising an inner layer (3) adapted to contact products to be stored; at least one intermediate layer (4) at least partially adhering to the inner layer (3); an outer layer (5) adhering to the intermediate layer (4); the web (101) has at least one partial non-adhesion zone (7) between the inner layer (3) and the intermediate layer (4); the partial non-adhesion zone (7) is defined by a plurality of distinct non-adhesion areas (7) in which the inner layer (3) does not adhere to the intermediate layer (4).