Hemp Spinning Fiber Treatment for Softness Without Strength Loss
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Solution Overview
Problem
Current methods for processing hemp fibers for spinning are inefficient, leading to low productivity and difficulty in producing soft, spinnable hemp threads due to the fibers' stiffness and smooth surface, which causes issues with spinning devices and results in uneven thread quality.
Innovation Solution
A production method involving immersion of raw hemp fibers in a treatment liquid containing an alkaline agent and cellulolytic enzymes, followed by washing and drying, to soften and swell the fibers, allowing for the removal of lignin and improvement of fiber permeability, resulting in fibers with fine naps and twisting suitable for high productivity spinning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hemp fibers are treated with strong alkali or strong acid to enhance softness, then the softness of the fibers is improved, but the strength of the fibers is notably reduced
Solution Approach 1:
The patent changes the chemical parameters of the treatment liquid by using a specific pH range (8-11) and temperature range (40-60°C) to achieve softening without excessive strength loss. The treatment liquid composition is carefully controlled with cellulolytic enzyme concentration of 0.1-5 g/L and buffering agents to maintain optimal conditions that balance softness improvement with strength preservation.
Solution Approach 2:
The patent introduces cellulolytic enzymes as intermediary substances that mediate between the harsh chemical treatment and the fiber structure. These enzymes selectively break down lignin and hemicellulose between cellulose fibers, softening the material without directly attacking the cellulose chains that provide strength, thus acting as a gentle mediator in the treatment process.
2Ease of operation
If hemp fibers are physically shredded and beaten with fulling block to remove lignin and soften material, then the softness is improved, but the productivity is low
Solution Approach 1:
The patent replaces the traditional mechanical system of fulling blocks and manual beating with a chemical-biological treatment system. The treatment liquid containing cellulolytic enzymes chemically breaks down lignin and hemicellulose, achieving softening without mechanical damage to fibers. This substitution eliminates the need for extensive mechanical processing while maintaining fiber integrity and improving productivity.
Solution Approach 2:
The patent changes the processing parameters from mechanical intensity and duration to chemical treatment conditions including pH control (8-11), temperature control (40-60°C), and enzyme concentration (0.1-5 g/L). These parameter changes enable controlled softening that preserves fiber strength and reduces processing time compared to traditional mechanical methods.
3Manufacturing precision
If hemp fibers are compressed between rollers before spinning, then the fiber alignment is improved, but sufficient yields are not achieved when spinning
Solution Approach 1:
The patent performs preliminary softening and lignin removal treatment before the spinning process. By pre-treating the fibers with cellulolytic enzymes to remove lignin and soften the material, the fibers become more pliable and easier to align during subsequent rolling and spinning operations. This preliminary action reduces fiber breakage and improves spinning yield without compromising alignment 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 method produces hemp fibers that are soft, easily caught by spinning devices, and yield twisted threads with uniform thickness, enhancing productivity and improving the feel of hemp-based products.
Implementation Method 1
immersing raw hemp fiber in a treatment liquid containing an alkaline agent, water, and at least one enzyme comprising cellulose
Implementation Method 2
immersing raw hemp fiber in a treatment liquid containing an alkaline agent, water, and at least one enzyme comprising cellulose
Implementation Method 3
washing the hemp fiber
Implementation Method 4
drying the washed hemp fiber
Data Source
Figure 1A~1B
Figure 2A~2B
AI summary
A production method of hemp fiber for spinning, the method including: an immersion treatment process of immersing raw hemp fiber in a treatment liquid including an alkali, water, and at least one type of enzyme selected from the group consisting of cellulose-degrading enzymes and glycosidic bond hydrolyzing enzymes for an immersion time of from 30 minutes to 60 minutes under conditions of a temperature of from 60°C to 100°C; a water-washing process of washing the immersion treated hemp fiber with water; and a drying process of drying the water-washed hemp fiber.