Tape With Segmented Slits Preventing Transverse Cutting
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Solution Overview
Problem
Reinforced tapes with high tensile strength are prone to cutting when a side edge is scratched due to strength reduction from friction or tensile loads, leading to potential separation in the transverse direction.
Innovation Solution
A tape design featuring strength-reducing slits and non-slit portions aligned in the longitudinal direction, combined with a sub-base material or resin to prevent opening and enhance strength, ensuring the slits do not overlap in the transverse direction, thereby preventing cuts from developing in the transverse direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the tape is reinforced with high-strength fibers to increase tensile strength, then the tensile strength is improved, but the tape becomes more prone to cutting when a side edge is scratched due to strength reduction from friction or tensile loads
Solution Approach 1:
The tape is segmented into strength-reducing portions with slits and strength-maintaining portions without slits. This segmentation allows the tape to have controlled weak points that guide cut propagation along the longitudinal direction while maintaining overall structural integrity and resistance to transverse cutting
Solution Approach 2:
Different portions of the tape have different structural qualities - the strength-reducing portions have slits that reduce strength locally, while the strength-maintaining portions have higher strength. This local differentiation allows the tape to redirect cut propagation to favorable directions while maintaining overall reliability
2Reliability
If slits are formed in the tape to create strength-reducing portions, then cut propagation can be controlled, but the tape strength is reduced at those locations
Solution Approach 1:
The tape is divided into alternating strength-reducing portions with slits and strength-maintaining portions without slits. The slits in the strength-reducing portions control cut propagation direction, while the adjacent strength-maintaining portions compensate for the local strength reduction, maintaining overall tape strength
Solution Approach 2:
The strength-reducing portions and strength-maintaining portions are combined in an alternating pattern along the tape. This merging allows the weak portions to control cut propagation while the strong portions provide structural support, achieving both cut control and strength retention
Data Source
AI summary
A tape having an elongated shape includes a strength-reducing portion, a strength-maintaining portion, a and an opening prevention portion. The strength-reducing portion includes a first slit row and a second slit row parallel to the first slit row. Each slit row includes a plurality of slits and a plurality of non-slit portions that are portions in which the slits are not formed. The plurality of non-slit portions belonging to the first slit row and the plurality of non-slit portions belonging to the second slit row do not overlap each other in a transverse direction of the tape. The opening prevention portion closes ends of the plurality of slits. The strength-reducing portion and the strength-maintaining portion are aligned in the transverse direction of the tape.