Porous Suction Fixing Sheet for High-Temperature Sheet Stability
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Solution Overview
Problem
Suction fixing sheets used in large areas or under high temperature conditions tend to loosen, wrinkle, and displace, leading to unintended deformation and damage of suction targets, particularly non-self-supporting thin sheet-like bodies, as existing technologies do not adequately address these issues.
Innovation Solution
A suction fixing sheet with a porous sheet and a double-sided pressure-sensitive adhesive sheet or layer, where the adhesive is either substrate-supported or crosslinked, ensuring air permeability and a thickness ratio of 8.0 or more, to prevent loosening and wrinkling, and restrict adhesive flow under high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the area of the suction fixing sheet is increased to process larger suction targets, then processing efficiency is improved, but the sheet is more likely to loosen, wrinkle, and displace during placement and use
Solution Approach 1:
The patent changes the physical and chemical parameters of the adhesive, specifically using a crosslinkable pressure-sensitive adhesive with controlled gel fraction (5-80%) and specific molecular weight. This modifies the adhesive's flow characteristics and temperature resistance, allowing large sheets to maintain stability without loosening or displacing during placement and high-temperature processing
Solution Approach 2:
The patent creates a composite adhesive system combining a pressure-sensitive adhesive base polymer with a crosslinking agent. This composite structure provides both the initial pressure-sensitive adhesion needed for placement and the crosslinked network that prevents displacement and maintains integrity under high temperature conditions, enabling reliable use of large-area sheets
2Ease of operation
If a pressure-sensitive adhesive is used to fix the suction fixing sheet to the suction surface, then the sheet is held in place, but lifting and displacement occur under high temperature conditions, especially as sheet area increases
Solution Approach 1:
The patent modifies the adhesive's temperature resistance by introducing crosslinking chemistry and controlling the gel fraction parameter. The crosslinked network structure maintains adhesive strength at high processing temperatures, preventing the lifting and displacement that occurs with conventional non-crosslinked pressure-sensitive adhesives
Solution Approach 2:
The patent incorporates a crosslinking agent into the pressure-sensitive adhesive formulation before application. This preliminary inclusion of the crosslinking agent allows the adhesive to form a heat-resistant crosslinked network after application, preventing high-temperature displacement without requiring separate post-application crosslinking steps
3Ease of operation
If the suction fixing sheet is placed in a freely movable manner without pressure-sensitive adhesive, then placement flexibility is improved, but displacement from correct fixing position occurs more likely
Solution Approach 1:
The patent adjusts the adhesive parameters to create a balance between initial tack for easy placement and final bond strength for position fixation. The controlled gel fraction and crosslinking density provide sufficient initial flexibility for alignment while ensuring the sheet remains firmly fixed at the correct position without displacement
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
The solution effectively suppresses lifting and displacement of the suction fixing sheet, reducing the risk of deformation and damage to suction targets, even under high temperature conditions and large sheet areas, by maintaining adhesion and preventing excessive air permeation.
Implementation Method 1
a porous sheet having air permeability in its thickness direction
Implementation Method 2
a double-sided pressure-sensitive adhesive sheet provided with a substrate and having air permeability in its thickness direction, the double-sided pressure-sensitive adhesive sheet being disposed on one surface of the porous sheet
Implementation Method 3
a double-sided pressure-sensitive adhesive layer unprovided with a substrate, formed of a crosslinked pressure-sensitive adhesive
Data Source
AI summary
The suction fixing sheet of the present disclosure is a suction fixing sheet to be placed on a suction surface of a suction device to prevent contact between a suction target and the suction surface. The suction fixing sheet includes a porous sheet having air permeability in its thickness direction; and a double-sided pressure-sensitive adhesive sheet provided with a substrate, having air permeability in its thickness direction, and disposed on one surface of the porous sheet, or a double-sided pressure-sensitive adhesive layer unprovided with a substrate, formed of a crosslinked pressure-sensitive adhesive, having air permeability in its thickness direction, and disposed on one surface of the porous sheet. The ratio of the thickness of the porous sheet to the thickness of the double-sided pressure-sensitive adhesive sheet or the double-sided pressure-sensitive adhesive layer is 8.0 or more.