Turn-Up Adhesive Composite Sheets for Laminated Core Protection
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Solution Overview
Problem
Existing methods for severing and transferring a paper web from a full spool to an empty spool cause damage to laminated cores, limiting their useful life and requiring frequent replacement, which is costly and inefficient.
Innovation Solution
A paperband composite with regional coatings of adhesives, release layers, and perforations is used to facilitate multiple spooling cycles, minimizing damage to the laminate core by using a substrate with spool face and paperweb adhesives, and allowing for easy removal and reapplication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional turn-up tape is used for severing and transferring paper web, then the turn-up operation can be completed, but the laminated core surface is damaged requiring frequent replacement
Solution Approach 1:
The patent changes the adhesive parameter from permanent bonding to removable bonding by using a release coating layer between the turn-up tape and laminated core. This allows the tape to be removed without damaging the core surface, resolving the contradiction between achieving reliable turn-up operation and preventing core damage.
Solution Approach 2:
The patent introduces a release coating layer as an intermediary between the turn-up tape adhesive and the laminated core surface. This intermediary layer enables the tape to be applied securely for turn-up operations while allowing clean removal that preserves the core surface integrity.
2Productivity
If turn-up tape is applied and removed after one use, then the turn-up function is achieved, but the laminated core must be replaced frequently
Solution Approach 1:
The patent changes the durability parameter of the adhesive system from single-use to multi-use by incorporating a release coating. This allows the turn-up tape to be removed and reapplied multiple times on the same laminated core, extending core useful life and reducing replacement frequency, thereby improving productivity and reducing downtime.
3Reliability
If strong adhesive is used to secure paper web during high-speed spooling, then transfer reliability is improved, but core damage increases
Solution Approach 1:
The patent applies different adhesive properties to different locations: the adhesive facing the paper web provides strong bonding for reliable transfer, while the release coating layer facing the laminated core provides removable bonding that prevents damage. This local differentiation of adhesive quality resolves the contradiction between transfer reliability and core protection.
Solution Approach 2:
The patent changes the adhesive strength parameter at the core interface by introducing a release coating layer, reducing it from high (damaging) to low (non-damaging) while maintaining high adhesive strength at the paper web interface for reliable transfer.
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 paperband composite enables multiple turn-up processes without damaging the laminate core, extending its lifespan and reducing replacement frequency, thus optimizing production efficiency and cost-effectiveness.
Implementation Method 1
The paperband composite may be fixedly attached to the first spool face with the spool face adhesive
Implementation Method 2
The paper web may be contacted with a first quantity of a first paperweb adhesive included in the paperband composite and transfer the paper web from a full web spool to the empty web spool
Data Source
AI summary
Methods and apparatus to form tear-off composite adhesive sheets that adhesively attach a paper web to an empty web spool. In some embodiments, the composite adhesive sheet is applied in several layers to an empty web spool, each layer suitable for fixedly attaching a paper web to the empty spool. Multiple layers of composite adhesive sheet allow for use during multiple turn-up procedures with one layer of composite adhesive sheet used per turn-up procedure. In some examples, the composite adhesive sheet may be applied to a paper spool tangentially along the spool face and perpendicular to the axis of rotation of the spool. In other examples, the composite adhesive sheet may be spirally wrapped around the paper spool.