Pre-coated Adhesive Closure Tape for Diaper Manufacturing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Diaper manufacturers face increased material and processing costs due to the need for additional adhesive application steps and the use of release tapes in mechanical fastening systems, which complicates the manufacturing process and requires precise timing for adhesive activation.
Innovation Solution
A closure tape system featuring a mechanical fastener strip and pre-coated adhesive on a non-woven base, which is activated by heat during the manufacturing process, allowing direct attachment to diaper bodies without additional adhesive application steps, utilizing a continuous feed and cutting process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If release tapes with high material costs are used, then the closure system can be attached to diaper bodies, but the material cost increases significantly
Solution Approach 1:
The adhesive is pre-applied to the closure tape in an inactive state during tape manufacturing, eliminating the need for release tapes. The adhesive is activated later during the diaper assembly process through heat or pressure, directly attaching the closure tape to the diaper body without requiring additional release tape materials.
Solution Approach 2:
The invention extracts and eliminates the release tape component from the traditional closure system. By using a pre-coated adhesive that can be activated directly on the closure tape, the release tape is removed entirely from the material list, reducing material costs while maintaining attachment functionality.
2Reliability
If additional adhesive application steps are added, then the closure tape can be attached to diaper bodies, but the processing complexity and time increase
Solution Approach 1:
The adhesive application step is performed in advance during closure tape manufacturing rather than during diaper assembly. The adhesive is applied in an inactive state to the closure tape, then activated later through heat or pressure during the diaper assembly process, eliminating the need for additional adhesive application equipment and steps.
Solution Approach 2:
The invention merges the adhesive application function into the closure tape manufacturing process itself, rather than treating it as a separate step during diaper assembly. This integration eliminates the need for additional adhesive application equipment and reduces overall process complexity.
3Manufacturing precision
If adhesive application time is extended, then the adhesive can be applied accurately, but the production speed decreases due to limited open time
Solution Approach 1:
The adhesive is applied in advance during closure tape manufacturing in a controlled environment where precision can be achieved. The adhesive is then stored in an inactive state and activated later during diaper assembly through heat or pressure, eliminating the need for rapid precise application at the point of use and allowing for optimized production speeds.
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 simplifies the manufacturing process by eliminating the need for additional adhesive application, reducing material costs, and ensuring consistent adhesive activation, thereby streamlining the production of diapers with a reliable and secure closure system.
Implementation Method 1
a pre-coated adhesive region of the closure tape is activated by heat
Data Source
Figure 1~2
AI summary
The present invention proposes a method for forming a roll carrying a certain length of closure tape for continuous feed into a diaper manufacturing line, said method comprising the steps of lamination of a continuous substrate with a continuous mechanical fastener strip at a distal portion of said substrate in the cross direction, application of adhesive to a second distal edge portion of said substrate in the cross direction and winding said adhesive applied continuous substrate into a roll. Said method further comprises unwinding a roll of a certain length of closure tape, subjecting said certain length of unwound closure tape to heat by means of heated cylinders after the open time of said pre-coated adhesive is terminated, cutting said certain length of unwound closure tape to specific shapes in the form of closure tapes, attaching said shaped closure tapes to diaper bodies at said adhesive pre-coated regions.