Moisture-Barrier Packaging for Heat-Resistant Coated Carbon Members
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Solution Overview
Problem
The peeling of heat-resistant material coatings on carbon substrates occurs when stored for extended periods due to moisture absorption and vaporization, leading to coating failure during heating.
Innovation Solution
A heat-resistant coat member packaged using a substrate coated with heat-resistant materials like pyrolytic boron nitride, enclosed in a bag member with low water vapor permeability (0.3 g/m2·day) and a gas barrier film, and controlled surface roughness to prevent moisture ingress and peeling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the coated carbon material is packaged in a polyethylene bag, then it can be easily produced at low cost with good heat sealability, but moisture penetrates through the bag during long-term storage causing coating peeling when heated
Solution Approach 1:
The patent applies composite packaging structure by combining polyethylene bag with water vapor barrier layer (aluminum foil or other barrier materials). The polyethylene provides heat sealability and manufacturing ease, while the water vapor barrier layer prevents moisture penetration. This composite structure resolves the contradiction between ease of manufacture and reliability during long-term storage.
Solution Approach 2:
The patent changes the water vapor permeability parameter of the packaging bag by adding a water vapor barrier layer. The barrier layer reduces water vapor transmission rate to extremely low levels, preventing moisture accumulation on the substrate during storage. This parameter change maintains the original polyethylene bag's heat sealability while eliminating the moisture penetration issue.
2Duration of action of stationary object
If the coated carbon material is stored for long periods, then it can be kept for future use, but moisture adsorption on the substrate causes coating peeling when heated
Solution Approach 1:
The patent extracts the harmful moisture from the storage environment by implementing a water vapor barrier layer in the packaging. This barrier layer actively prevents moisture ingress, effectively removing the moisture threat that would otherwise accumulate on the substrate during long-term storage and cause coating peeling.
Solution Approach 2:
The patent performs preliminary protection by incorporating the water vapor barrier layer into the packaging design before storage begins. This preliminary action prevents moisture adsorption on the substrate from the outset, ensuring coating adhesion stability throughout the entire storage period and eliminating the need for pre-heating or drying treatments before use.
3Loss of time
If the coated carbon material is used after long-term storage, then it can be utilized from inventory, but additional drying treatments are required before heating to prevent peeling
Solution Approach 1:
The patent performs the moisture prevention action preliminarily during packaging by incorporating the water vapor barrier layer. This preliminary protection eliminates the need for subsequent drying treatments before heating, allowing the coated carbon material to be used directly from inventory after long-term storage without any additional time-consuming preparation steps.
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 prevents peeling of the heat-resistant material even after long-term storage, allowing immediate use at high temperatures without additional drying treatments.
Implementation Method 1
the bag member has a water vapor permeability of 0.3 g/m2·day or less
Implementation Method 2
moisture that has passed through the polyethylene bag is adsorbed on a substrate, and when the heat-resistant coat member is heated, the moisture adsorbed on the substrate is gasified, which may cause peeling of a heat-resistant material
Implementation Method 3
when the heat-resistant coat member is heated, the moisture adsorbed on the substrate is gasified, which may cause peeling of a heat-resistant material
Data Source
AI summary
The present invention relates to a heat-resistant coat member packaged body including: a heat-resistant coat member formed by coating a substrate with a heat-resistant material; and a bag member that accommodates the heat-resistant coat member wherein the bag member has a water vapor permeability of 0.3 g/m2·day or less. The present invention also relates to a method for packaging a heat-resistant coat member, including packaging a heat-resistant coat member obtained by coating a substrate with a heat-resistant material with a bag member having a water vapor permeability of 0.3 g/m2·day or less. According to the present invention, it is possible to provide a heat-resistant coat member packaged body capable of obtaining a heat-resistant coat member in which peeling of a heat-resistant material coating a substrate can be suppressed even when heated after being stored for a long period of time, and a method for packaging the heat-resistant coat member.