Virus-Blocking Laminate Film with Air-Permeable Layer
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Solution Overview
Problem
Current laminate films for virus blocking are expensive and not suitable for mass production, lack virus blocking ability, and are not easily processable for medical and disinfection applications, which are critical for preventing infectious virus transmission.
Innovation Solution
A laminate film composed of an air-permeable film layer with polyethylene resin and inorganic filler, an adhesive layer, and a bi-component non-woven fabric layer, which provides excellent air and moisture permeability, waterproofing, and virus blocking capabilities, while being economical and suitable for mass production and ultrasonic sewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional laminate films are used for virus blocking, then virus blocking ability is achieved, but manufacturing cost is high
Solution Approach 1:
The patent uses a composite structure consisting of a polyethylene resin layer combined with a fluororesin layer. This composite material approach achieves effective virus blocking while controlling manufacturing costs by selecting appropriate resin combinations and layer configurations that balance performance and production feasibility.
2Reliability
If conventional laminate films are used for virus blocking, then virus blocking ability is achieved, but mass production workability is poor
Solution Approach 1:
The laminate film is divided into distinct functional layers: a polyethylene resin base layer and a fluororesin functional layer. This segmentation allows each layer to be manufactured and quality-controlled separately, then combined through lamination, improving overall mass production workability while maintaining virus blocking performance.
3Reliability
If conventional laminate films are used for virus blocking, then virus blocking ability is achieved, but processability for ultrasonic sewing is difficult
Solution Approach 1:
The patent optimizes the physical and chemical parameters of the resin materials, particularly the molecular weight, melt flow index, and crystallinity of the polyethylene and fluororesin layers. These parameter adjustments ensure the laminate film has appropriate thermal properties and mechanical strength for ultrasonic sewing processing while maintaining virus blocking functionality.
4Reliability
If conventional laminate films are used for virus blocking, then virus blocking ability is achieved, but texture is not soft like ordinary clothes
Solution Approach 1:
The patent applies local quality by making the fluororesin layer thin and strategically positioned on the polyethylene base layer. This allows the inner surface contact layer to have soft, comfortable texture like ordinary clothes, while the fluororesin provides virus blocking functionality on the outer or intermediate surface, achieving both comfort and protection.
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 laminate film achieves effective virus blocking, moisture permeability, and waterproofing while being cost-effective and easily processable for medical and disinfection applications, enhancing safety and efficiency in manufacturing and use.
Implementation Method 1
capable of passing sweat and water vapor
Implementation Method 2
an adhesive layer, and a non-woven fabric layer which includes a bi-component non-woven fabric
Data Source
AI summary
The present invention relates to a laminate film for blocking a virus and a method for manufacturing same, including a laminate film for blocking a virus in which an air-permeable film layer including 20 to 40 parts by weight of an inorganic filler with respect to 100 parts by weight of a polyethylene resin, an adhesive layer, and a non-woven fabric layer including a bi-component non-woven fabric that is made by mixing at least two selected from polyolefin-based non-woven fabrics, are sequentially laminated, and to a method for manufacturing the laminate film, comprising: a) manufacturing an air-permeable film by stretching a disc-shaped sheet obtained by melting and extruding a compound composition and processing same; b) coating an adhesive on one surface of the air-permeable film which has been stretched; c) adhering, a bi-component non-woven fabric; and d) rolling using rollers.