Integrally Molded False Eyelash With Seamless Stem Formation

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Solution Overview

Problem

Traditional false eyelash products face issues with adhesive bonding leading to detachment, noticeable seams, manual operation complexity, difficulty in achieving complex styles, and material stiffness, limiting production efficiency and product quality.

Innovation Solution

An integrally molded false eyelash with a single-piece substrate made from flexible materials, featuring a seamless connection and customizable design, produced through laser cutting and surface treatments, including plasma activation and functional coatings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If adhesive bonding method is used to connect eyelash to stem, then assembly flexibility is improved, but production efficiency deteriorates and reliability worsens due to detachment

Engineering Contradiction:

Improveassembly flexibilityVSAvoidproduction efficiency

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent merges the eyelash and stem into a single integrated component formed from one piece of material. The eyelash structure includes a stem region and eyelash units connected without adhesive, eliminating the bonding process entirely and achieving both high production efficiency and reliability through integral formation.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent replaces the adhesive bonding mechanism with a mechanical integration approach where the eyelash and stem are formed as one continuous structure. This substitution eliminates the need for adhesive materials and bonding processes, thereby improving production efficiency and eliminating detachment issues.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Ease of manufacture

If adhesive bonding method is used to connect eyelash to stem, then assembly flexibility is improved, but reliability worsens due to detachment from adhesive aging or external force

Engineering Contradiction:

Improveassembly flexibilityVSAvoideyelash attachment stability

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Ease of manufacture

If separate structure design is used for eyelash and stem, then manufacturing simplicity is improved, but naturalness of wear deteriorates due to noticeable seam at connection point

Engineering Contradiction:

Improvemanufacturing simplicityVSAvoidnaturalness of wear

Core Design Contradiction:

Ease of manufactureVSShape

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent applies curvature principles to create a seamless transition between the stem region and eyelash units. The stem region features a pre-formed curvature matching natural eyelid curvature, and the connection interface is designed with smooth geometric transitions to eliminate visible seams, enhancing the natural appearance and wear comfort.

Inventive Principle:

Principle #14Spheroidality (Curvature)

4Ease of manufacture

If manual operation is used in production process, then flexibility in handling complex styles is improved, but manufacturing precision deteriorates making precise control difficult

Engineering Contradiction:

Improveflexibility in handling complex stylesVSAvoidcontrol of complex eyelash styles

Core Design Contradiction:

Ease of manufactureVSManufacturing precision

Solution Approach 1:

The patent replaces manual operation with automated laser cutting and processing systems. The laser cutting device precisely follows programmed paths to create complex eyelash patterns, gradients, and textures with high accuracy, eliminating the variability inherent in manual processes while maintaining design flexibility through programmable control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes programmable parameter control in the laser processing system to achieve precise variation in eyelash characteristics. By adjusting laser parameters (power, speed, focus) and processing conditions, the system can precisely control gradient lengths, openwork textures, and other complex styles with consistent precision.

Inventive Principle:

Principle #35Parameter changes

5Duration of action of stationary object

If synthetic fiber materials are used for false eyelashes, then durability is improved, but comfort deteriorates due to stiffness during wear

Engineering Contradiction:

ImprovedurabilityVSAvoidcomfort during wear

Core Design Contradiction:

Duration of action of stationary objectVSEase of operation

Solution Approach 1:

The patent employs composite material construction combining flexible thin sheet material (such as paper-based or polymer substrates) with synthetic fiber eyelash units. This composite structure provides the durability needed for repeated use while the flexible substrate and carefully engineered construction ensure comfort and natural movement during wear, avoiding the stiffness associated with purely synthetic constructions.

Inventive Principle:

Principle #40Composite materials

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 eliminates adhesive detachment, enhances production efficiency, achieves precise control of complex styles, combines natural and durable materials, and provides customizable color options, improving wear comfort and longevity.

Implementation Method 1

using a UV picosecond laser to cut out an eyelash contour and a connecting stem according to a preset path

Methodology Applied

Scientific EffectLaser cutting: Laser Ablation

Implementation Method 2

performing plasma surface activation, silane coupling agent coating, and UV curing treatment

Methodology Applied

Scientific EffectPlasma surface activation: Plasma

Implementation Method 3

presenting a continuous interface formed by thermal fusion of the material itself

Methodology Applied

Scientific EffectThermal fusion: Melting

Implementation Method 4

presenting a continuous interface formed by thermal fusion of the material itself or carbonization by laser cutting

Methodology Applied

Scientific EffectCarbonization by laser cutting: Laser Ablation

Implementation Method 5

a back surface of the connecting stem is compounded with a pressure-sensitive adhesive layer

Methodology Applied

Scientific EffectPressure-sensitive adhesive bonding: Adhesive

Data Source

PatentUS20250268326A1Integrally Molded False Eyelash and Manufacturing Process

Publication Date: 2025.08.28 QINGDAO MEINENG TECHNOLOGY CO LTD

AI summary

Disclosed is an integrally molded false eyelash and a manufacturing process thereof. The eyelash includes a single-piece continuous substrate constructed from a plastically deformable flexible thin sheet material, a material thereof being selected from at least one of natural plant fiber paper, a polyester-based polymer material, or a polyvinyl chloride-based material; an eyelash structure integrally molded with the substrate, including a plurality of simulated eyelash units extending from an edge of the substrate and a stem region connecting the eyelash units; the stem region having a pre-formed curvature matching a natural curvature of a human eyelid, and a thickness thereof gradually decreasing from an eyelash root towards a center of the substrate to form a smooth transition. Laser engraving technology replaces the traditional manual bonding process, greatly improving production efficiency. The integrally molded design completely eliminates the adhesive bonding step of traditional false eyelashes. The laser engraving process achieves a seamless connection between the eyelash and the connecting stem, making the product fit more naturally and enhancing wearing comfort.