Display Strip Adhesive Layering for Automated Bag Rebonding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional display strips struggle with automating the attachment of product-enclosed bags due to issues with pressure sensitive adhesive tapes sticking to machinery and difficulty in re-bonding removed bags, which complicates the process and affects appearance with dust and stains.
Innovation Solution
A display strip with a heat-sealable polymer layer and a pressure sensitive adhesive layer, where the heat-sealable polymer layer has a hot melt resin that melts for bonding and a weakness line to expose the adhesive layer for easy re-bonding of removed bags, allowing for automated and manual reattachment without hand sealers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If pressure sensitive adhesive tapes are used for bonding product-enclosed bags to display strips, then products can be bonded again after once bonded products are removed, but it is difficult to automate the attachment step by machine due to the adhesive sticking to rollers and machinery
Solution Approach 1:
The adhesive system is segmented into two distinct layers: a heat-sealable polymer layer for automated bonding and a pressure-sensitive adhesive layer for re-bonding. This segmentation allows each layer to perform its specific function without interfering with the other, enabling both automation and re-bonding capability.
Solution Approach 2:
The invention changes the bonding parameter from常温 pressure-sensitive adhesion to thermal adhesion for the automated attachment step. The heat-sealable polymer layer provides no adhesion at normal temperature, allowing smooth passage through machinery, and becomes adhesive only when heated, enabling automated bonding.
2Extent of automation
If pressure sensitive adhesive surfaces are covered with releasing sheets to prevent sticking to machinery, then automation becomes possible, but the work of bonding products becomes complicated and automation remains difficult
Solution Approach 1:
Instead of using releasing sheets, the invention changes the adhesion parameter of the polymer layer itself by controlling its glass transition temperature. The heat-sealable polymer remains non-adhesive at normal temperature (below Tg) and becomes adhesive only when heated above Tg, eliminating the need for releasing sheets and simplifying the overall system.
3Adaptability or versatility
If pressure sensitive adhesive tapes are used for bonding products, then re-bonding is possible, but dust and stains are stuck to the surfaces of the adhesive tapes thereby worsening appearance
Solution Approach 1:
The invention changes the adhesion state of the polymer layer from常温 adhesive to non-adhesive by controlling temperature relative to its glass transition temperature. At normal temperature (below Tg), the polymer is in a glassy state with no adhesion, preventing dust and stain accumulation. When heated above Tg, it becomes adhesive for bonding operations.
4Extent of automation
If heat-sealable polymer layer is used for bonding product-enclosed bags, then automation of bonding steps is easy, but once product-enclosed bags are removed, they cannot be bonded to the display strip again
Solution Approach 1:
The adhesive system is segmented into two distinct layers: a heat-sealable polymer layer for automated bonding and a pressure-sensitive adhesive layer for re-bonding. This segmentation allows each layer to perform its specific function without interfering with the other, enabling both automation and re-bonding capability.
Solution Approach 2:
The invention uses a composite adhesive structure combining two different adhesive materials with complementary properties: a heat-sealable polymer providing automated thermal bonding capability and a pressure-sensitive adhesive providing常温 re-bonding capability. The composite structure integrates the advantages of both material types.
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
Enables easy automation of bag attachment and reattachment of removed bags without manual effort, improving the display strip's functionality and appearance by preventing dust and stain adhesion.
Implementation Method 1
a heat-sealable polymer layer which composes the outmost layer of the display strip... said heat-sealable polymer layer includes a hot melt resin which has substantially no adhesion at a normal temperature and is bondable to said bags
Implementation Method 2
a pressure sensitive adhesive layer which composes the inner layer of said heat-sealable polymer layer... said pressure sensitive adhesive layer comprises adhesives which have adhesion at a normal temperature
Data Source
Figure 1
Figure 2
Figure 3(a)~3(c)
AI summary
The present invention provides a display strip (S,1) easy for automating the process of bonding product-enclosed bags (B) and capable of bonding the product-enclosed bags once removed again. The present invention relates to a display strip to which plural of product-enclosed bags are displayed and bonded, and said display strip is at least composed of a substrate layer (5) and an adhesive layer (2), and said adhesive layer has a layer structure of two or more layers comprising a heat-sealable polymer layer (2a) in which an outmost layer includes a resin which has substantially no adhesion at a normal temperature and is bondable to said bags and a pressure sensitive adhesive layer (2b) including adhesives in which an inner layer of the above mentioned heat-sealable polymer layer shows adhesion at a normal temperature and further, said heat-sealable polymer layer has a weakness line (3) in the vicinity of portions at which said product-enclosed bags are bonded so that said heat-sealable polymer layer is surely destroyed to expose said pressure sensitive adhesive layer when said product-enclosed bags bonded by heat seal are removed.