Lofty Blended Yarn Water Shrinkage Control

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Solution Overview

Problem

Current methods for producing lofty blended yarns do not effectively utilize artificial proteins to achieve desired loftiness, water absorbency, and versatility in fabric characteristics.

Innovation Solution

A lofty blended yarn is created by combining a first fiber with an artificial protein that shrinks when exposed to water and a second fiber with a lower shrinkage rate, where the yarn has a loftiness of 10 cm^3/g or more, and the first fiber content is 5% or more of the total mass, with the fibers being either of the same or different types, and produced through spinning methods like woolen or worsted spinning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Quantity of substance

If artificial protein fibers are used to achieve high water absorbency and loftiness, then water absorbency and loftiness are improved, but shrinkage control becomes difficult

Engineering Contradiction:

Improvewater absorbencyVSAvoidshrinkage control

Core Design Contradiction:

Quantity of substanceVSManufacturing precision

Solution Approach 1:

The patent combines artificial protein fibers with synthetic fibers to create a blended yarn. The artificial protein fibers provide water absorbency and loftiness, while the synthetic fibers provide shrinkage resistance. This composite material approach allows the yarn to achieve both high water absorbency and controlled shrinkage characteristics simultaneously.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent creates different fiber types within the same yarn with different shrinkage characteristics. The artificial protein fibers are designed with specific shrinkage properties while the synthetic fibers have different shrinkage properties. This local differentiation of properties within the yarn structure enables simultaneous achievement of high water absorbency and controlled shrinkage.

Inventive Principle:

Principle #3Local quality

2Volume of stationary object

If high shrinkage rate fibers are used to achieve loftiness, then loftiness is improved, but fabric stability deteriorates

Engineering Contradiction:

ImproveloftinessVSAvoidfabric stability

Core Design Contradiction:

Volume of stationary objectVSStability of the object's composition

Solution Approach 1:

The patent uses a composite yarn structure where artificial protein fibers with high shrinkage rate contribute to loftiness, while synthetic fibers with low shrinkage rate maintain fabric stability. The combination allows the fabric to achieve both volumetric expansion and dimensional stability.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent carefully controls the shrinkage rate parameters of the artificial protein fibers within a specific range (5-30%) to achieve optimal loftiness while preventing excessive shrinkage that would compromise fabric stability. This parameter optimization balances the competing requirements.

Inventive Principle:

Principle #35Parameter changes

3Adaptability or versatility

If artificial protein fibers with molecular design are used to achieve versatile characteristics, then adaptability is improved, but manufacturing complexity increases

Engineering Contradiction:

Improvecharacteristic varietyVSAvoidmanufacturing complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent utilizes molecular design of artificial protein fibers to create different fiber types with specific shrinkage rates and other characteristics. By controlling molecular parameters during fiber production, the patent achieves versatile yarn characteristics without requiring complex manufacturing processes at the yarn level.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent incorporates different types of artificial protein fibers with different molecular designs and properties within the same yarn. This allows the yarn to exhibit versatile characteristics such as varying shrinkage rates, water absorbency, and loftiness, while the manufacturing process remains relatively simple since the fiber diversity is established at the fiber production stage rather than requiring complex yarn processing.

Inventive Principle:

Principle #3Local quality

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 resulting yarn exhibits enhanced water absorbency, softness, heat retention, and anti-pilling properties due to controlled shrinkage and molecular design of the artificial protein fibers, offering a wide range of characteristics in the final fabric.

Implementation Method 1

a first fiber that contains an artificial protein and is shrinkable when being brought into contact with water

Methodology Applied

Scientific EffectShrinkage: Thermal Contraction

Implementation Method 2

Since the lofty blended yarn of the present invention contains an artificial protein, the lofty blended yarn is excellent in water absorbency

Methodology Applied

Scientific EffectWater absorbency: Absorption (physical)

Data Source

PatentEP4527999A1Lofty blended yarn and method for producing same

Publication Date: 2025.03.26 CRANE INC

Figure 1

AI summary

The present invention relates to a lofty blended yarn containing: a first fiber including an artificial protein fiber that contains an artificial protein and is shrinkable when being brought into contact with water; and a second fiber that has a shrinkage rate lower than a shrinkage rate of the first fiber when being brought into contact with water, in which the lofty blended yarn has a loftiness of 10 cm3/g or more.