Packaging Film Laminate Dual Adhesive Release Section
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Solution Overview
Problem
Existing packaging film laminates have limited adhesive force between film arrangements, making it difficult to ensure secure sealing and resealing of packages, as they rely on a single adhesive that is either too weak or too strong, and lack a dedicated release section for easy reattachment.
Innovation Solution
A packaging film laminate with two distinct adhesives, where a higher adhesive force is used in the permanent section and a lower adhesive force in the release section, allowing for secure bonding and easy detachment, and featuring a separating gap to prevent adhesive mixing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single adhesive is used in the packaging film laminate, then the structure is simple and manufacturing is easier, but the adhesive force is limited and cannot provide both secure bonding and easy detachment
Solution Approach 1:
The patent applies different adhesives with different adhesive forces to different regions of the packaging film laminate. The first adhesive with higher adhesive force is applied to the permanent section to ensure secure bonding, while the second adhesive with lower adhesive force is applied to the release section to enable easy detachment and resealing. This local differentiation of adhesive properties resolves the contradiction between secure bonding and easy detachment.
Solution Approach 2:
The patent uses a composite adhesive system comprising two different adhesives with distinct adhesive force characteristics. This composite approach combines the advantages of both strong and weak adhesives in a single packaging film laminate, allowing the permanent section to maintain strong bonding while the release section allows easy detachment, thereby improving overall reliability without complicating the manufacturing process excessively.
2Strength
If a single adhesive with high adhesive force is used, then secure bonding between film arrangements is achieved, but detachment and resealing becomes difficult or destructive
Solution Approach 1:
The patent differentiates adhesive properties by location: the permanent section uses a first adhesive with high adhesive force to ensure secure bonding that maintains package integrity, while the release section uses a second adhesive with lower adhesive force that allows easy non-destructive detachment and resealing. This spatial differentiation of adhesive strength resolves the contradiction between bonding strength and ease of operation.
Solution Approach 2:
The packaging film laminate is segmented into two functional regions with different adhesive characteristics: a permanent section for secure bonding and a release section for easy detachment. This segmentation allows each region to fulfill its specific function without compromising the other, enabling both strong bonding where needed and easy resealing where required.
3Ease of operation
If a single adhesive with low adhesive force is used, then easy detachment and resealing is achieved, but secure bonding and package integrity are compromised
Solution Approach 1:
The patent applies a second adhesive with lower adhesive force specifically to the release section to enable easy detachment and resealing operations, while the first adhesive with higher adhesive force is applied to the permanent section to maintain secure bonding and package integrity. This localized application of different adhesive strengths resolves the contradiction between ease of operation and bonding strength.
4Ease of manufacture
If the adhesive layer uses uniform adhesive properties throughout, then manufacturing is simpler, but it cannot provide both secure permanent bonding and easy release section detachment
Solution Approach 1:
The patent implements local quality differentiation within the adhesive layer by applying two different adhesives with distinct adhesive force properties to different sections of the packaging film laminate. The permanent section receives a first adhesive optimized for strong bonding, while the release section receives a second adhesive optimized for easy detachment. This approach maintains manufacturing simplicity while achieving functional versatility.
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
This solution ensures strong, secure packaging with easy resealing capabilities by maintaining high adhesive force in the permanent section and facilitating release and reattachment in the designated section, while maintaining the integrity of the packaging material.
Implementation Method 1
an adhesive layer (38) arranged between the first and the second film arrangement (20, 24) and connecting the first and the second film arrangement (20, 24) to one another
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a packaging film laminate (10) comprising a first film arrangement (20), a second film arrangement (24), and an adhesive layer (38) which lies between said arrangements and which contributes to the interconnection of same. The first film arrangement (20) has a release portion (28, 30, 32) which is defined by a material weakness (36) and borders a permanent portion (26) of the same film arrangement (20) at least along some sections, and which, in contrast to the permanent portion (26), can be removed from the originally common extension surface of the packaging film laminate (10) and thus from the packaging film laminate (10) against the adhesive force of the adhesive layer (38). The adhesive layer (38) has at least two adhesive materials (40, 42) which differ in terms of their respective adhesive forces acting between the first (20) and the second film arrangement (24) at a room temperature of 20 °C, wherein a first adhesive material (40) provides a stronger adhesive force per surface unit in comparison to a second adhesive material (42) and is applied in the region of the permanent portion (26), and a second adhesive material (42) provides a weaker adhesive force per surface unit in comparison to the first adhesive material (40) and is provided in the region of the release portion (28, 30, 32).