Cellular Heat-Insulating Skin Material for Stable Contact Cool Feeling
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional skin materials, such as synthetic leather, become excessively hot or cold when exposed to extreme temperatures, leading to discomfort when in contact with skin, especially in vehicle interiors where they are susceptible to outside air temperatures.
Innovation Solution
A skin material with a cellular heat-insulating layer and a coloring layer sequentially stacked on a fibrous substrate, featuring unevenness on the surface, with a softening temperature range of 110° C. to 250° C. and a contact cool feeling (Qmax) of 0.30 W/cm2 or less before and after heat treatment, which maintains a consistent cool/hot feeling by minimizing heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a cellular heat-insulating layer is formed in a resin layer to reduce contact cool/hot feeling, then the contact cool feeling is improved, but the closed holes deform when exposed to high temperature for a long time, lowering the intrinsic effect of the heat-insulating layer
Solution Approach 1:
The patent applies parameter changes by carefully selecting and controlling the softening temperature of the cellular heat-insulating layer within a specific range (90-200°C). This parameter optimization ensures the material maintains its cellular structure and heat-insulating properties under vehicle interior temperature conditions while still providing the desired contact cool feeling. The softening temperature is set below the highest expected service temperature to prevent deformation of closed holes.
Solution Approach 2:
The patent uses composite materials by combining the cellular heat-insulating layer with other resin layers (such as wear-resistant layers, printing layers, or leather grain layers) to create a multi-layer skin material. This composite structure allows the cellular layer to provide heat insulation while other layers provide protective functions, maintaining overall performance under high temperature exposure.
2Ease of manufacture
If conventional skin materials are used, then manufacturing is simple, but the materials become excessively hot or cold when exposed to extreme temperatures, causing discomfort
Solution Approach 1:
The patent employs porous materials by incorporating a cellular heat-insulating layer with closed holes into the skin material structure. This porous structure provides thermal insulation by trapping air pockets that resist heat transfer, preventing the material from becoming excessively hot or cold when exposed to extreme temperatures, while maintaining manufacturability through established coating and curing processes.
3Object-affected harmful factors
If the softening temperature of the cellular heat-insulating layer is set too low, then the contact cool feeling is enhanced, but the closed holes deform under high temperature exposure, reducing durability
Solution Approach 1:
The patent resolves this contradiction through parameter changes by defining an optimal softening temperature range (90-200°C) for the cellular heat-insulating layer. This parameter selection balances two requirements: a sufficiently low softening temperature to maintain cellular structure and provide contact cool feeling, and a sufficiently high softening temperature to prevent deformation of closed holes under high temperature exposure during the material's service life.
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 skin material effectively maintains a low contact cool/hot feeling even under extreme temperatures for an extended period, reducing the sensation of temperature change when in contact with skin, thus enhancing user comfort and durability.
Implementation Method 1
a cellular heat-insulating layer which has a softening temperature of 110° C. to 250° C.
Implementation Method 2
a cellular heat-insulating layer which has a softening temperature of 110° C. to 250° C.
Data Source
AI summary
A skin material (1) includes a cellular heat-insulating layer (3) and a coloring layer (4) which are sequentially stacked on a fibrous substrate (2) and has protrusions and recesses on a front face (6). The cellular heat-insulating layer (3) has a softening temperature of 110 to 250° C. A contact cool feeling (Qmax) of the front face (6) of the skin material (1) is 0.30 W/cm2 or less both before and after a heat treatment for 2400 hours at 70° C.