Pressure-Sensitive Adhesive Film Laser Absorption
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing PSA films used for laser machining with short-wavelength lasers, such as those with a center wavelength of 1.0 μm to 1.1 μm, often result in low-quality cuts and decreased efficiency due to inadequate laser beam absorption and reflectance properties.
Innovation Solution
A PSA film with a multi-layer resin film substrate and a PSA layer, designed to have specific lightness values and laser beam absorption characteristics, ensuring high absorbance (55-95%) and low reflectance (5-40%) in the 1000 nm to 1100 nm range, facilitating efficient cutting by absorbing the laser energy and maintaining surface properties like designability and weathering resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a PSA film is used for short-wavelength laser machining (1.0-1.1 μm), then the laser machining process can be performed, but the cut quality is low and efficiency decreases due to inadequate laser beam absorption and reflectance properties
Solution Approach 1:
The patent changes the optical parameters (reflectance and transmittance) of the resin film in the specific wavelength range of 1000-1100 nm. By controlling the reflectance to be 5-40% and transmittance to be 5-60%, the absorbance is optimized to 55-95%, enabling efficient laser beam absorption and high-quality cutting with short-wavelength lasers.
Solution Approach 2:
The patent uses a multi-layer resin film structure where different layers have different properties. The resin film comprises multiple layers with different compositions and thicknesses, allowing optimization of both laser beam absorption for cutting and surface properties for printability and weathering resistance.
2Productivity
If the resin film has high laser beam absorbance (55-95%) for efficient cutting, then cutting efficiency improves, but surface properties like printability and weathering resistance may be compromised
Solution Approach 1:
The patent applies local quality by giving different layers of the resin film different properties. The laser beam absorbing layer contains carbon black for high absorbance and efficient cutting, while the outer surface layer has properties optimized for printability and weathering resistance. This allows each layer to perform its specific function optimally.
Solution Approach 2:
The resin film is segmented into multiple layers: a laser beam absorbing layer containing carbon black for efficient cutting, and an outer surface layer with optimized properties for printability and weathering resistance. This segmentation allows independent optimization of cutting efficiency and surface quality.
3Productivity
If the resin film is made opaque for high laser beam absorbance, then laser cutting efficiency improves, but surface designability and visual appearance are reduced
Solution Approach 1:
The resin film is divided into functional segments: an inner laser beam absorbing layer that is opaque for efficient cutting, and an outer surface layer that can be transparent or translucent for designability. This segmentation allows the film to be both efficiently cuttable and visually appealing.
Solution Approach 2:
Different regions of the resin film have different optical properties. The inner layer has high absorbance for cutting efficiency, while the outer surface layer has optimized transparency or translucency for designability and visual appearance, allowing both requirements to be met simultaneously.
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 PSA film achieves high-quality cuts with precise control over cut width and edge shape, while maintaining surface properties like designability and weathering resistance, enhancing the efficiency and accuracy of laser machining processes.
Implementation Method 1
The resin film has a laser beam reflectance of 5% or higher, but 40% or lower in a wavelength range of 1000 nm to 1100 nm. It also has a laser beam transmittance of 5% or lower in the said wavelength range. This gives rise to a laser beam absorbance of 55 to 95% in the wavelength range, allowing the PSA film to efficiently absorb a laser beam
Implementation Method 2
The resin film has a laser beam reflectance of 5% or higher, but 40% or lower in a wavelength range of 1000 nm to 1100 nm
Data Source
AI summary
The pressure-sensitive adhesive film according to the present invention comprises a resin film as a substrate and a pressure-sensitive adhesive layer provided at least on a face of the resin film. The resin film has a multi-layer constitution consisting of at least two layers. The resin film has a laser beam reflectance of 5% or higher, but 40% or lower in a wavelength range of 1000 nm to 1100 nm, and has a laser beam transmittance of 5% or lower in the said wavelength range.