Double-Sided Adhesive Tape for Low-Temperature Impact Absorption
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Solution Overview
Problem
Existing double-sided pressure-sensitive adhesive tapes exhibit reduced impact-absorbing properties in low-temperature regions, limiting their effectiveness in protecting devices from impacts.
Innovation Solution
A double-sided pressure-sensitive adhesive tape with a base material layer and adhesive layers, featuring a storage modulus of elasticity ranging from 1.0×105 Pa to 1.0×108 Pa across a temperature range of -25°C to 120°C, and pressure-sensitive adhesive layers with a maximum storage modulus of 1.0×1010 Pa or less, utilizing polar functional group-containing polymers like polyamide, polyurethane, and polyurea, and adhesive layers composed of acrylic, rubber-based, silicone-based, or urethane-based adhesives.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a double-sided pressure-sensitive adhesive tape is designed to absorb impact, then its impact-absorbing property is improved, but its performance deteriorates in low-temperature regions
Solution Approach 1:
The patent applies parameter changes by carefully controlling the storage modulus of elasticity E' of the base material layer to be within 1.0×10^5 Pa to 1.0×10^8 Pa across a wide temperature range from -25°C to 120°C. This parameter optimization ensures the adhesive tape maintains both impact-absorbing capability and low-temperature performance by adjusting the mechanical properties of the base material to balance flexibility and structural integrity under varying thermal conditions
Solution Approach 2:
The patent employs composite materials by combining a base material layer with specific polar functional group-containing polymers (such as polyamide, polyurethane, or polyurea) and pressure-sensitive adhesive layers. This composite structure integrates materials with complementary properties: the base material provides impact absorption while the adhesive layers ensure bonding reliability, creating a multi-functional system that performs consistently across different temperature regions
2Strength
If the base material layer has low storage modulus of elasticity for impact absorption, then impact-absorbing property is improved, but adhesive strength may deteriorate
Solution Approach 1:
The patent applies local quality by differentiating the functional properties of different layers: the base material layer is designed with low storage modulus (1.0×10^5 Pa to 1.0×10^8 Pa) specifically for impact absorption, while the pressure-sensitive adhesive layers are formulated with polar functional groups to provide strong bonding force. Each layer performs its specialized function locally, allowing the overall structure to achieve both impact resistance and adhesive strength without compromise
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 tape provides excellent impact-absorbing properties across a wide temperature range, particularly in low-temperature regions, enhancing protection for devices against impacts.
Implementation Method 1
a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein an entirety of the double-sided pressure-sensitive adhesive tape has a storage modulus of elasticity E' in a range of from 1.0×10^5 Pa to 1.0×10^8 Pa, which is measured at from −25° C. to 120° C. and a frequency of 1 Hz
Data Source
AI summary
Provided is a double-sided pressure-sensitive adhesive tape excellent in impact-absorbing property in the entirety of a wide temperature range, in particular, in a low-temperature region. The double-sided pressure-sensitive adhesive tape of the present invention includes: a base material layer; and pressure-sensitive adhesive layers arranged on both surface sides of the base material layer, wherein an entirety of the double-sided pressure-sensitive adhesive tape has a storage modulus of elasticity E′ in a range of from 1.0×105 Pa to 1.0×108 Pa, which is measured at from −25° C. to 120° C. and a frequency of 1 Hz.