Moisture-Absorbing Padding Composition for Warmth and Bulkiness
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Solution Overview
Problem
Conventional padding materials, such as those using polyester or moisture absorptive/desorptive cross-linked acrylic fibers, fail to achieve both high exothermic properties upon moisture absorption and bulkiness, leading to inadequate warmth-keeping and comfort in bedding and clothing applications.
Innovation Solution
Incorporating cross-linked polyacrylate fibers of magnesium or calcium salts with polyester fibers, which exhibit high elastic modulus and moisture absorption coefficients, to create a padding with both exothermic and bulkiness properties, allowing for efficient warmth retention and comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of stationary object
If polyester fiber is used for padding, then bulkiness and warmth-keeping property are improved, but exothermic property upon moisture absorption deteriorates
Solution Approach 1:
The patent combines polyester fiber with cross-linked polyacrylate fiber (magnesium salt type or calcium salt type) to create a composite padding material. The polyester fiber provides bulkiness and warmth-keeping property, while the polyacrylate fiber contributes exothermic property upon moisture absorption. This composite structure allows both properties to coexist and function simultaneously.
2Use of energy by moving object
If cross-linked acrylic fiber of sodium salt type is used, then exothermic property upon moisture absorption is improved, but bulkiness and warmth-keeping property deteriorate
Solution Approach 1:
The patent changes the metal salt type from sodium salt to magnesium salt or calcium salt in the cross-linked polyacrylate fiber. This parameter change results in improved bulkiness while maintaining exothermic property upon moisture absorption. The magnesium or calcium salt type fibers have higher bulkiness compared to conventional sodium salt type fibers.
3Use of energy by moving object
If moisture absorptive/desorptive cross-linked acrylic fiber is used, then exothermic property upon moisture absorption is improved, but warmth-keeping property deteriorates due to low bulkiness
Solution Approach 1:
The patent creates a composite structure combining polyester fiber (providing bulkiness for warmth-keeping) with cross-linked polyacrylate fiber of magnesium or calcium salt type (providing exothermic property). This composite allows the padding to maintain high warmth-keeping property through bulkiness while simultaneously achieving high exothermic property upon moisture absorption.
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 padding achieves high levels of exothermic property upon moisture absorption and bulkiness, maintaining warmth and comfort by converting incorporated air into warm, low-humidity air, effectively addressing the limitations of prior art padding materials.
Implementation Method 1
adsorbs the moisture of the air contained in the padding
Implementation Method 2
exothermic property upon moisture absorption which results in warm air
Data Source
AI summary
The present invention provides padding which is suitable as bedding and clothing items having both exothermic property upon moisture absorption and bulkiness in high levels and being able to give comfortable environment to human body. The present invention relates to a padding containing 25 to 85% by weight of polyester fiber, characterized in that the padding contains 15 to 75% by weight of a cross-linked polyacrylate fiber of a magnesium salt type and/or a calcium salt type.