3D Polymer Composite Fiber Embedding With Pillar-Array Encapsulation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing 3D printing methods for continuous fiber manufacturing face challenges such as uneven fiber distribution, poor bonding between fibers and matrix, surface roughness, shape distortion, and structural defects like voids and irregularities, particularly in vat photopolymerization, which lack effective means for embedding continuous fibers.

Innovation Solution

A novel 3D printing methodology integrating vat photopolymerization, continuous fiber writing, and encapsulation, utilizing pillar array shapes and spatial distributions to enhance mechanical properties through weaving, knitting, and waving patterns, with seamless integration of successive layers without additional bonding treatments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If vat photopolymerization is used to create channels for embedding fibers, then 3D structures can be constructed with increased speed and precision, but effective means for embedding continuous fiber is absent, resulting in poor interlayer bonding and structural defects

Engineering Contradiction:

Improve3D structure precisionVSAvoidinterlayer bonding quality

Core Design Contradiction:

Manufacturing precisionVSReliability

Solution Approach 1:

The polymer matrix is formed in advance as a supporting structure before fiber embedding. The channels are pre-formed through photopolymerization, and then continuous fibers are embedded into these pre-formed channels, ensuring proper fiber positioning and matrix-fiber bonding without compromising structural integrity

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The polymer matrix serves as an intermediary medium that facilitates fiber embedding. By forming the matrix first and then embedding fibers within channels created by this matrix, the process enables effective fiber integration while maintaining layer bonding quality

Inventive Principle:

Principle #24Intermediary (Mediator)

2Strength

If extrusion-based continuous fiber manufacturing is used, then fiber reinforcement can be achieved, but uneven fiber distribution and poor bonding between fibers and matrix occur

Engineering Contradiction:

Improvefiber reinforcementVSAvoidfiber distribution uniformity

Core Design Contradiction:

StrengthVSManufacturing precision

Solution Approach 1:

Instead of uniform extrusion, the method employs localized fiber embedding into specific channels formed by the polymer matrix. This allows controlled fiber distribution in regions where reinforcement is needed, achieving uniform fiber placement and improved fiber-matrix bonding through localized processing

Inventive Principle:

Principle #3Local quality

3Productivity

If traditional DIW technology is used for large-scale printing, then low cost and high molding efficiency are achieved, but structural defects such as trapped gas, voids, or irregularities result in poor interlayer bonding

Engineering Contradiction:

Improvemolding efficiencyVSAvoidstructural defect-free bonding

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The method replaces traditional mechanical extrusion and injection processes with photopolymerization-based channel formation. This substitution eliminates mechanical defects like trapped gas and voids by using light-induced polymerization to create precise channels for fiber embedding, resulting in defect-free interlayer bonding

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

This method improves mechanical properties by doubling the strength and increasing strain capacity of polymer composites, prevents catastrophic fragmentation, and enables the fabrication of complex structures with embedded fibers, suitable for applications in mechanical metamaterials, dynamic actuation, thermal management, and smart optics.

Implementation Method 1

Vat Photopolymerization (VPP), capable of constructing 3D structures with increased speed and precision compared to FDM and DIW, lacks sufficient exploration in CFM. Initially, materials accumulate within the liquid resin tank through light-initiated polymerization

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Data Source

PatentUS20250375937A1Method of forming a polymer composite and apparatus for the same

Publication Date: 2025.12.11 THE ARIZONA BOARD OF REGENTS ON BEHALF OF THE UNIV OF ARIZONA

AI summary

A method of forming a polymer composite includes forming an array of pillars of a polymer material, each pillar of the array of pillars separated by intermediate spaces, weaving, waving, and/or knitting a continuous fiber in a controlled pattern within the intermediate spaces between the array of pillars, and encapsulating the continuous fiber with a subsequent layer of the polymer material.