Thermosensitive Window Material With Adhesive-Layer Dimming
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Solution Overview
Problem
Existing window and roof materials with temperature-sensitive dimming properties require complex structures and labor-intensive manufacturing processes.
Innovation Solution
A window and roof material comprising a light-transparent base material layer and an adhesive layer with a temperature-sensitive non-crosslinked polymer and crosslinked fine particles, where the refractive index and adhesive force change with temperature, allowing for autonomous cloudiness adjustment without a complicated structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If a temperature-sensitive dimming liquid laminated body is provided in a window to autonomously change cloudiness in response to temperature, then the window can automatically adjust sunlight transmission, but the structure becomes complicated and manufacturing requires more time and labor
Solution Approach 1:
The patent combines the temperature-sensitive dimming function with the adhesive layer by incorporating temperature-sensitive crosslinked fine particles and non-crosslinked polymer into the adhesive composition. This merging eliminates the need for a separate temperature-sensitive dimming liquid laminated body and its dedicated structure body, thereby reducing structural complexity while maintaining automatic cloudiness adjustment functionality
Solution Approach 2:
The adhesive layer is designed to serve multiple functions: it provides both the bonding function between base material layers and the temperature-sensitive dimming function. By making the adhesive layer multi-functional, the patent eliminates the need for separate dedicated structures for dimming, thereby reducing overall device complexity while maintaining automation
2Extent of automation
If a temperature-sensitive dimming liquid laminated body is provided in a window to autonomously change cloudiness in response to temperature, then the window can automatically adjust sunlight transmission, but manufacturing time and labor increase
Solution Approach 1:
The patent merges the temperature-sensitive dimming function with the adhesive layer by incorporating temperature-sensitive crosslinked fine particles and non-crosslinked polymer into the adhesive composition. This eliminates the need for separate manufacturing processes for dedicated dimming structures, thereby reducing manufacturing time and labor while maintaining automatic cloudiness adjustment
Solution Approach 2:
The temperature-sensitive dimming components are pre-incorporated into the adhesive composition during adhesive layer preparation. This preliminary action ensures that the dimming functionality is built-in from the start, eliminating the need for subsequent installation of separate dimming structures and reducing overall manufacturing time
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 materials can easily change cloudiness in response to temperature, reducing direct sunlight in high temperatures and allowing sunlight in low temperatures, while being easily manufactured and designed for visual temperature awareness.
Implementation Method 1
a refractive index of the temperature-sensitive crosslinked fine particles reducing with an increase in temperature
Implementation Method 2
a refractive index reduction proportion, as an amount of decrease in the refractive index per 1° C., of the temperature-sensitive crosslinked fine particles being larger near a melting point of the temperature-sensitive crosslinked fine particles
Implementation Method 3
an adhesive force of the adhesive composition reducing with an increase in temperature
Implementation Method 4
the adhesive force reduction proportion, as an amount of decrease in adhesive force per 1° C., of the adhesive composition being larger near a melting point of the temperature-sensitive non-crosslinked polymer
Data Source
AI summary
Provided are: a window material and a translucent roof material which can autonomously change white turbidity in accordance with the temperature, and which have a simple structure and are easy to manufacture; and a vehicle, a ship, or an airplane, and a building comprising the window material and/or the translucent roof material. A window material or a translucent roof material according to the present invention comprises at least one translucent base material layer and at least one pressure sensitive adhesive layer. The pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing, with respect to 100 parts by mass of a pressure-sensitive adhesive agent, 1-20 parts by mass of a thermosensitive noncrosslinked polymer and 1-100 parts by mass of thermosensitive crosslinked fine particles. The refractive index of the thermosensitive crosslinked fine particles is reduced as the temperature increases, and the reduction rate of the refractive index is larger in the vicinity of the melting temperature of the thermosensitive crosslinked fine particles than in a temperature range other than the vicinity of the melting point. The adhesive power of the pressure-sensitive adhesive composition is reduced as the temperature increases, and the reduction rate of the adhesive power is larger in the vicinity of the melting temperature of the thermosensitive noncrosslinked polymer than in the temperature range other than the vicinity of the melting point.