Adhesive Laminate Section Handling via Web Acceleration
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Solution Overview
Problem
The production of adhesive laminate sections from a master roll often results in significant waste material, particularly in the manufacturing of transdermal drug delivery devices with extended release liners, which complicates handling and storage stability.
Innovation Solution
A method involving the use of a first web with adhesive laminate sections joined by tie points, where these sections are transferred to a second web with a release surface, allowing for detachment and spacing of the sections to minimize waste by accelerating the second web relative to the first, thereby reducing the amount of waste material generated during the conversion process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If adhesive laminate sections are produced by stamping or cutting from a master roll, then production efficiency is improved, but significant waste material is generated
Solution Approach 1:
The adhesive laminate is divided into individual sections that remain connected through tie points, allowing selective detachment. This segmentation enables efficient production while minimizing waste by only separating sections when needed, rather than cutting the entire master roll into individual pieces upfront.
Solution Approach 2:
The adhesive laminate sections are pre-prepared on the master roll with tie points that maintain connection. This preliminary configuration allows for efficient handling and storage of the master roll while enabling on-demand detachment of individual sections, reducing waste compared to pre-cutting all sections.
2Ease of operation
If transdermal drug delivery devices have an extended release liner, then handling ease and storage stability are improved, but additional converting steps are required generating more waste
Solution Approach 1:
The method combines the production of extended release liner devices with the section detachment process. By integrating these operations, the patent eliminates the need for separate converting steps that would generate additional waste, achieving both handling ease and waste reduction.
Solution Approach 2:
The second web with release surface automatically receives and detaches sections as it accelerates relative to the first web. This self-service mechanism produces extended release liner devices without requiring additional manual converting steps, reducing waste while improving handling.
3Ease of operation
If sections are detached by traditional methods, then individual sections are obtained, but drug-containing waste is generated requiring disposal
Solution Approach 1:
The first web with remaining adhesive laminate sections is recovered and can be reused or recycled. This approach minimizes drug-containing waste by maximizing the utilization of the master roll material, unlike traditional methods where cut-off sections are discarded as 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 approach effectively reduces production waste and allows for the efficient production of transdermal drug delivery devices with extended release liners, improving handling and storage stability by minimizing the amount of drug-containing waste and optimizing the use of materials.
Implementation Method 1
the second web is accelerated relative to the first web, thereby detaching the first section from the second section
Implementation Method 2
adjacent sections of the adhesive laminate remain joined to one another in the longitudinal direction of the web through one or more tie points
Data Source
AI summary
A method of handling an adhesive laminate, wherein the adhesive laminate is provided releasably adhered to a first web, comprising a plurality of cut or punched sections and wherein adjacent sections of the adhesive laminate remain joined to one another in the longitudinal direction of the web through one or more tie points. A first supporting structure and a second supporting structure adjacent to the first supporting structure are provided. The first web is led over the first supporting structure. A second web is provided and led over the second supporting structure, wherein the second web is oriented such that the release surface of the second web faces the first supporting structure. A leading portion of a first section of adhesive laminate from the first web is attached to the release surface of the second web and the second web is advanced such that the first section of the adhesive laminate is detached from a second section of adhesive laminate and the leading edge of the second section of adhesive laminate is adhered to the second web in a spaced apart configuration from the trailing edge of the first section of the adhesive laminate. A transdermal drug delivery device prepared by such a method.