Soft Anti-Release Moisture Absorbent Composition for Vehicle Lamps
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Solution Overview
Problem
Conventional moisture absorbents used in vehicle lamps experience issues such as condensation, fogging, and leakage due to volume expansion and moisture re-release, leading to safety concerns and maintenance needs, particularly in high humidity environments.
Innovation Solution
A composition comprising 30-70% metal chloride, 20-50% metal oxide, and 1-10% cellulose derivative, along with 5-20% lipid, which adjusts to a specific ratio to facilitate high moisture absorption with minimal volume change and low release rates, preventing damage to packaging materials and maintaining a gel state without hardening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional bentonite-based moisture absorbent is used, then moisture absorption is achieved, but moisture re-release occurs in high temperature low humidity environments causing condensation
Solution Approach 1:
The patent uses a composite material system consisting of calcium chloride (30-70 wt%), calcium oxide (20-50 wt%), and carboxymethyl cellulose (1-10 wt%). This composite structure combines the high moisture absorption capability of calcium chloride with the moisture retention properties of calcium oxide and the gel-forming ability of carboxymethyl cellulose, preventing both over-absorption and re-release of moisture.
Solution Approach 2:
The patent optimizes the composition ratios of each component to achieve optimal performance. Specifically, calcium chloride content is controlled at 30-70 wt% for high absorption, calcium oxide at 20-50 wt% for moisture retention, and carboxymethyl cellulose at 1-10 wt% for gel formation. These parameter adjustments ensure the absorbent maintains moisture without re-releasing it under varying environmental conditions.
2Quantity of substance
If calcium chloride or magnesium chloride is used alone, then high moisture absorbency is achieved, but absorbed liquid flows causing fatal problems to objects inside container
Solution Approach 1:
The patent combines calcium chloride with calcium oxide and carboxymethyl cellulose to create a composite that absorbs moisture but prevents liquid flow. The calcium oxide acts as a buffer to control the deliquescent properties, while carboxymethyl cellulose forms a gel matrix that immobilizes the absorbed liquid, eliminating the harmful liquid flow effect.
Solution Approach 2:
Carboxymethyl cellulose serves as an intermediary substance between the calcium chloride and the absorbed moisture. It forms a gel structure that mediates the interaction between the hygroscopic salt and water, allowing high absorption while preventing the formation of free-flowing liquid through gelation.
3Quantity of substance
If calcium chloride or magnesium chloride is mixed with calcium oxide or magnesium oxide, then moisture absorbency is improved, but volume expansion occurs and excess moisture remains in liquid phase
Solution Approach 1:
The patent creates a three-component composite where carboxnymethyl cellulose (1-10 wt%) works synergistically with calcium chloride and calcium oxide. This additional component controls the hydration process and prevents excessive volume expansion by forming a stable gel structure that accommodates the absorbed moisture without deliquescent liquid formation.
Solution Approach 2:
The patent adjusts the composition parameters to limit volume expansion. By controlling calcium oxide content at 20-50 wt% and adding carboxymethyl cellulose at 1-10 wt%, the system achieves optimal balance between absorption capacity and volume stability, preventing the excessive expansion that occurs with conventional mixtures.
4Quantity of substance
If moisture absorbent volume expands in container, then absorption capacity increases, but inner wall pressure causes liquid to leak out of packaging material
Solution Approach 1:
The patent optimizes the composition to minimize volume expansion. By controlling the ratios of calcium chloride (30-70 wt%), calcium oxide (20-50 wt%), and carboxymethyl cellulose (1-10 wt%), the system achieves high absorption capacity while maintaining volume stability, thereby reducing pressure on container walls and preventing leakage.
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 suppresses corrosion and external leakage, maintaining a high moisture absorption rate while minimizing volume changes and damage to packaging materials, thus providing a reliable moisture absorption product for vehicle lamps.
Implementation Method 1
conventional moisture absorbent composed of only calcium chloride or magnesium chloride, moisture absorbency thereof is high
Implementation Method 2
a composition for a soft anti-release moisture absorbent... cellulose derivative... easily gelates with a high moisture absorption rate
Implementation Method 3
5 to 20% by weight of a lipid... the composition easily gelates with a high moisture absorption rate... maintaining a gel state without hardening
Data Source
AI summary
A moisture absorbent product prepared according to the present invention is characterized by adjusting a composition ratio of a metal chloride, a metal oxide, a cellulose derivative, and a lipid to a specific range, thereby suppressing corrosion, rust, external leakage of a product due to moisture release in an environment such as high temperature while maintaining a high moisture absorption rate, and minimizing a volume change due to moisture absorption. Thus, the moisture absorbent product can be usefully used as a moisture absorption product embedded in a vehicle lamp.