Plant-based functional polypropylene spunbond non-woven fabric and preparation method thereof
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Solution Overview
Problem
Current polypropylene spunbond non-woven fabrics exhibit poor hygroscopicity, low moisture regain, and a rough, dry texture, limiting their applications due to their synthetic fiber composition and structure.
Innovation Solution
A plant-based functional polypropylene spunbond non-woven fabric is developed, incorporating a plant herb water-soluble extract within a specific weight percentage range, combined with antioxidants and modifiers to enhance moisture absorption and mechanical properties, using a modified polypropylene resin and a spinning process that includes high-speed stirring and hot-rolling to achieve improved softness and strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polypropylene spunbond non-woven fabric is used, then mechanical strength and breathability are improved, but moisture regain and hygroscopicity deteriorate
Solution Approach 1:
The patent applies composite materials by combining polypropylene fibers with plant-based functional additives (saponin, glycyrrhizin, flavonoids) to create a non-woven fabric that maintains the mechanical strength of PP while gaining moisture-absorbing and softening properties from the plant compounds. This resolves the contradiction by integrating two material systems with complementary properties.
Solution Approach 2:
The patent changes the chemical composition parameters of the polypropylene by incorporating plant extract compounds at specific concentrations (saponin 0.1-1.0%, glycyrrhizin 0.1-0.5%, flavonoids 0.1-0.5%). These parameter changes transform the hydrophobic PP material into a hydrophilic composite with improved moisture regain while preserving structural integrity.
2Stability of the object's composition
If polypropylene spunbond non-woven fabric is used, then structural stability is improved, but surface smoothness and softness deteriorate
Solution Approach 1:
The patent modifies surface parameters by introducing plant-based compounds that alter the fiber surface chemistry. The saponin, glycyrrhizin, and flavonoids change the surface energy and morphology, transforming the rough synthetic fiber surface into a smooth, soft surface while maintaining the underlying structural stability of the spunbond fabric.
3Reliability
If plant herb water-soluble extract is added, then moisture regain and softness are improved, but manufacturing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-extracting and concentrating the plant compounds into a standardized water-soluble extract before incorporation into the spinning process. This pre-preparation simplifies the manufacturing process compared to using raw plant materials, as the extract can be directly added to the polypropylene melt during standard extrusion and spinning operations.
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 fabric demonstrates enhanced moisture regain, mechanical strength, and softness, with a moisture regain of 0.2%-3%, longitudinal breaking strength of 18.5 N/5 cm, and transverse breaking strength of 9.5 N/5 cm, offering improved hygroscopicity and flexibility while maintaining fiber strength, suitable for medical and hygiene applications.
Implementation Method 1
the non-woven fabric product has poor hygroscopicity and low moisture regain... The resulting fabric demonstrates enhanced moisture regain, mechanical strength, and softness, with a moisture regain of 0.2%-3%
Implementation Method 2
using a modified polypropylene resin and a spinning process that includes high-speed stirring and hot-rolling
Implementation Method 3
a spinning process that includes high-speed stirring and hot-rolling to achieve improved softness and strength
Data Source
AI summary
A plant-based functional polypropylene spunbond non-woven fabric and a preparation method of the plant-based functional polypropylene spunbond non-woven fabric are provided. The plant-based functional polypropylene spunbond non-woven fabric contains a plant herb water-soluble extract in a weight percentage range of approximately 0.2%-1.5%. The plant-based functional polypropylene spunbond non-woven fabric has moisture regain in a range of approximately 0.2%-3%, a longitudinal breaking strength of approximately ≥18.5 N/5 cm, a transverse breaking strength of approximately ≤9.5 N/5 cm, a thickness in a range of approximately 0.2 mm-0.5 mm, a weight per unit area in a range of approximately 20 g/m2-40 g/m2, and a fiber diameter in a range of approximately 10 μm-30 μm.