Split-Yarn Nonwoven Mask Sheet for Skin Adhesion and Wettability
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Solution Overview
Problem
Conventional nonwoven-fabric type mask pack sheets made from synthetic fibers suffer from weak contractility, poor self-supporting force, frequent separation from the skin, and limited wettability with cosmetic compositions, leading to discomfort and ineffective delivery of ingredients.
Innovation Solution
A nonwoven sheet for mask packs using split yarns formed from 60-80 wt% polyethylene terephthalate (PET) and 20-40 wt% nylon, manufactured via a spun-bond method, which provides improved flexibility, wettability, and strength, ensuring better adhesion and resistance to tearing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional nonwoven fabric made from synthetic fibers is used, then manufacturing is simple and cost-effective, but the sheet has poor adhesion to skin and limited wettability
Solution Approach 1:
The patent uses composite materials by combining hydrophilic fibers (polyacrylic acid, carboxymethyl cellulose, or starch) with synthetic fibers (polyester or polypropylene) in a blended nonwoven fabric. The hydrophilic fibers improve skin adhesion and wettability while the synthetic fibers maintain structural integrity and ease of manufacture, resolving the contradiction between manufacturing simplicity and adhesion performance.
Solution Approach 2:
The patent changes the chemical composition parameters of the nonwoven fabric by incorporating specific hydrophilic substances at controlled ratios (5-50 wt% of total fibers). This parameter change enhances the fabric's interaction with skin and cosmetic compositions without fundamentally altering the manufacturing process, thus improving adhesion while maintaining ease of production.
2Reliability
If excessive amount of essence is used to improve attachment, then skin adhesion is enhanced, but the weight of the pack increases causing discomfort
Solution Approach 1:
The patent changes the intrinsic parameters of the mask sheet material by incorporating hydrophilic fibers that enhance adhesion through moisture absorption and hydrogen bonding with skin. This allows achieving good skin attachment with normal essence amounts, preventing the weight increase that would occur with excessive essence application.
Solution Approach 2:
The hydrophilic fibers in the nonwoven fabric provide self-adhesion capability by naturally absorbing moisture and forming hydrogen bonds with the skin surface. This self-service adhesion mechanism reduces dependence on excessive essence for attachment, thereby maintaining lightweight construction while ensuring reliable skin adhesion.
3Reliability
If hydrogel-type mask pack sheet is used, then good adhesion to skin is achieved, but the sheet becomes heavy due to great thickness
Solution Approach 1:
The patent applies local quality by incorporating hydrophilic fibers specifically within the nonwoven fabric structure to provide adhesion at the skin-contact interface. This localized approach to adhesion enhancement allows the bulk of the sheet to remain thin and lightweight, achieving good skin adhesion without the need for overall thickness increase that would cause weight gain.
Solution Approach 2:
The patent creates a composite nonwoven fabric combining hydrophilic adhesion-providing fibers with lightweight synthetic fibers. This composite structure achieves hydrogel-like skin adhesion properties through the hydrophilic component while maintaining the lightweight characteristic of the synthetic fiber matrix, avoiding the weight penalty of thick hydrogel sheets.
4Ease of manufacture
If conventional nonwoven fabric is used, then manufacturing is easy, but self-supporting force and resistance to tearing are poor
Solution Approach 1:
The patent uses composite materials by blending hydrophilic fibers with strong synthetic fibers (polyester or polypropylene) in a nonwoven fabric. The synthetic fibers provide structural strength and tear resistance while the hydrophilic fibers are incorporated in sufficient quantity to maintain adhesion and wettability, thus achieving both ease of manufacture and improved mechanical strength.
Solution Approach 2:
The patent applies local quality by strategically incorporating hydrophilic fibers within a robust synthetic fiber matrix. The synthetic fibers provide the structural framework for self-support and tear resistance, while the hydrophilic fibers are distributed to provide localized adhesion and wettability functions, maintaining manufacturing simplicity while enhancing overall performance.
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 solution enhances skin adhesion, improves wettability with cosmetics, and provides a stable, comfortable wear experience by maintaining the mask pack's integrity and facilitating the absorption of cosmetic solutions, as demonstrated by improved user satisfaction scores in blind tests.
Implementation Method 1
split yarns formed from two or more types of thermoplastic resin including polyethylene terephthalate (PET) and nylon
Implementation Method 2
facilitating the absorption of cosmetic solutions
Data Source
AI summary
The present invention relates to a nonwoven sheet for a mask pack, which has the improved adhesion and attachment to the skin due to the good flexibility of a material, which has improved wettability with respect to cosmetics, and which secures self-supporting force and good strength. Specifically, the present invention relates to a nonwoven sheet for a mask pack, which includes split yarns formed from two or more types of thermoplastic resin.