Blowable Floccule Insulation with Twisted Tail Portions
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Solution Overview
Problem
Existing insulation and filling materials that mimic down insulation are often too heavy and dense, clog conventional fill blowing equipment, and lack the soft hand feel and launderability of down.
Innovation Solution
The development of blowable insulation material comprising discrete, elongated floccules with a relatively open medial portion and condensed twisted tail portions, made from synthetic fibers like polyester, which can be used in conventional fill blowing machines without clogging and maintain soft hand feel and launderability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional insulation materials are used to achieve down-like qualities, then fill power and softness are improved, but the materials become too heavy and dense, causing clogging in filling equipment
Solution Approach 1:
The patent changes the physical and chemical parameters of polyester fibers by applying specific treatments (silicone treatment, crimping, twisting) to create floccules with down-like properties. The fibers are treated to achieve optimal density, softness, and loft characteristics that mimic down while maintaining manufacturability
Solution Approach 2:
The invention creates a composite structure by combining multiple polyester fibers into floccule formations with specific architectural characteristics. The composite floccules incorporate twisted core portions and radiating fiber arrangements to achieve both high fill power and appropriate weight characteristics
2Ease of operation
If insulation materials are made softer and more down-like, then hand feel is improved, but launderability deteriorates as materials stick together after washing
Solution Approach 1:
The patent applies chemical and physical treatments to modify fiber surface properties, including silicone treatments that provide both softness and anti-static properties. These treatments create a balance where fibers remain soft to the touch but resist sticking together during laundering cycles
Solution Approach 2:
The invention uses synthetic polyester fibers that can be replaced after limited use cycles, accepting that the material has a finite service life. The fibers are designed to maintain performance through a reasonable number of wash cycles before degradation becomes significant
3Temperature
If insulation material density is increased to improve thermal resistance, then thermal performance is improved, but blowing efficiency decreases and materials cannot be properly fed through equipment
Solution Approach 1:
The patent optimizes fiber density parameters to achieve optimal thermal resistance while maintaining airflow characteristics. The floccule structure is designed with controlled density gradients that provide thermal performance without excessive weight, enabling efficient handling and blowing through filling equipment
4Ease of manufacture
If synthetic fibers are used to create down-like insulation, then manufacturing consistency is improved, but the natural softness and comfort of down is lost
Solution Approach 1:
The invention creates composite floccule structures that combine multiple synthetic fibers in specific configurations to mimic the complex architecture of natural down. The composite structure includes core fibers, radiating fibers, and interconnecting elements that collectively reproduce down's softness and comfort characteristics
Solution Approach 2:
The patent systematically adjusts multiple fiber parameters including denier, length, crimp, twist, and surface treatment to replicate down's tactile properties. By optimizing these parameters, the synthetic fibers achieve softness and comfort levels comparable to natural down while maintaining manufacturing consistency
Data Source
AI summary
The disclosure provides blowable insulation or filling material, and apparatus and methods for making same. The blowable insulation or filling material includes a plurality of discrete elongate floccules each formed of a plurality of fibers. The floccules include a relatively open enlarged medial portion. The floccules also include relatively condensed twisted tail portions extending from opposing ends of the medial portion. The floccules can be utilized by existing garment fill blowing machines without clogging thereof, and include a superior soft hand feel, thermal resistance and launderability. The floccules may be formed by forcing staple fibers through apertures of a rotating hollow drum to partially form the floccule structure within the drum. The partially formed floccules may be retained within the rotating drum for a dwell time to finalize the floccule structure.