Slit-Embossed Nonwoven Textile for In-Line Shear Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Industrial textile films used in papermaking and other processes face premature delamination due to internal stresses caused by differential travel distances of film layers around small diameter rolls, leading to repetitive strain and potential bond failure.
Innovation Solution
The film layers are designed with protrusions that have one end integral and another end either detached or weakened, allowing for relative movement between layers while maintaining bond strength, reducing in-line shear forces and stress.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the film layers are joined with protrusions mated to land areas, then the bond strength between layers is improved, but the fabric is subjected to repetitive stress and strain causing premature delamination
Solution Approach 1:
The protrusions are segmented into two functional zones: an integral base portion that provides bonding strength and a detachable tip portion that accommodates differential movement. This segmentation allows the bond to remain strong while the tip can detach and reattach or flex to relieve stress, preventing delamination.
Solution Approach 2:
The protrusion structure transitions from a static rigid bond to a dynamic system where the tip portion can detach and reattach or flex during operation. This dynamic behavior allows the fabric to accommodate differential travel distances between layers without accumulating damaging stresses, thereby improving reliability.
2Stability of the object's composition
If the protrusions are fully integral to the film layers, then the structural integrity is improved, but the fabric cannot accommodate differential travel distances causing internal stresses
Solution Approach 1:
The protrusion is divided into an integral base portion that maintains structural integrity and a detachable tip portion that can flex or detach to accommodate differential movement. This segmentation preserves overall structural stability while allowing localized flexibility to relieve internal stresses.
Solution Approach 2:
The protrusion design changes the mechanical parameters of the film layer by introducing a detachable region with different flexibility characteristics. The integral base maintains rigidity for structural integrity, while the detachable tip provides flexibility to accommodate differential travel, thereby reducing internal stresses.
3Adaptability or versatility
If the fabric is designed for small diameter rolls, then the conveying capability is improved, but the differential travel distance between layers increases causing shear forces
Solution Approach 1:
The detachable tip portion of the protrusions creates a dynamic bond that can flex and reattach during the conveying process on small diameter rolls. This dynamic structure accommodates the increased differential travel distance without transmitting excessive shear forces to the bond, enabling use on smaller rolls while maintaining layer integrity.
Solution Approach 2:
The protrusion design changes the mechanical response of the fabric to shear forces by introducing a detachable region. This allows the fabric to accommodate larger differential travel distances enabled by small diameter rolls without the shear forces causing delamination, thereby improving adaptingability to different roll sizes.
Data Source
AI summary
A nonwoven industrial textile for conveying in an industrial process, seaming elements and methods of manufacture. The textile comprises at least first and second layers of film. Each layer comprises protrusions separated by land areas and each defining an aperture for a flow path through the layer. For at least one of the layers, the protrusions comprise a first set having first and second ends integral with contiguous land areas, and at least a second set of protrusions each comprising a first end integral with a contiguous land area and an opposing second end having a configuration selected from a detached free end; and a weakened end portion integral with but detachable from a contiguous land area in response to strain. The construction allows for relative movement of the layers during travel over machine components such as rolls, reducing internal strain and risk of delamination.