Transfer Tape Cord Profile for Web Severing
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Solution Overview
Problem
Existing methods for high-speed severing and transfer of paper webs from a rotating full web spool to an empty web spool are inefficient, as they require adjustments in speed or draw tension, and do not effectively minimize waste or optimize adherence.
Innovation Solution
The use of a transfer tape with an incorporated cord that elevates portions of the tape above the spool surface, enhancing the profile to fill an open nip and concentrating forces for improved severing and adherence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If transfer tape is applied flat against the spool surface, then the tape adheres smoothly to the spool, but the tape cannot effectively fill the open nip or concentrate forces for severing the web
Solution Approach 1:
The transfer tape is constructed with a cord or filament embedded within its structure that elevates a portion of the tape above the spool surface, creating a three-dimensional profile. This dimensional change allows the tape to fill the open nip space and concentrate severing forces at the elevated region, resolving the contradiction between smooth adhesion and effective force concentration.
2Productivity
If high-speed web transfer is performed without speed adjustments or draw tension changes, then productivity is maximized, but existing transfer methods cannot achieve effective severing and transfer
Solution Approach 1:
The elevated profile of the transfer tape performs the severing function automatically during high-speed operation without requiring external speed adjustments or draw tension changes. The tape's three-dimensional structure enables it to concentrate forces and sever the web inherently as it wraps around the spool, allowing the system to maintain maximum productivity while achieving reliable severing.
3Strength
If conventional transfer tape without elevated profile is used, then the tape structure is simple, but the tape cannot fill the open nip or effectively augment web severing
Solution Approach 1:
The transfer tape is constructed as a composite structure incorporating a cord or filament within the tape substrate. This composite design creates the elevated profile necessary for filling the open nip and concentrating severing forces, while the cord material is selected to be compatible with and repulpable into the paper product, minimizing waste.
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 enables efficient high-speed severing and transfer of paper webs without the need for speed adjustments or draw tension changes, while reducing waste by utilizing re-pulpable materials and improving adherence through elevated tape profiles.
Implementation Method 1
the transfer tape comprises a tape substrate coated on one side with a web grabbing pressure sensitive adhesive and on the other side with a mounting pressure sensitive adhesive
Data Source
AI summary
Methods and apparatus to form elevated profiles in mounted turn-up transfer tapes for paper processing. In some embodiments, the transfer tape may be a combination of a tape substrate coated on one side with a web grabbing adhesive and on the other side with a mounting adhesive and an affixed cord or cordlike feature, and a release liner having a release liner substrate fully coated on a first side with a release layer and zone-coated on a second side with a release layer. In some embodiments an elevated profile, similar to that resulting from the incorporated cord or cordlike feature, may be formed during the application of the transfer tape with specialized apparatus.