High-Solids Rubber Ink Formulation for Clog-Free 3D Printing
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Solution Overview
Problem
Existing rubber ink formulations for 3D printing face challenges such as nozzle clogging due to agglomeration and material shrinkage during curing, which affect the performance and durability of printed rubber parts, particularly in applications requiring thermal stability and chemical resistance.
Innovation Solution
A rubber ink formulation with a polymeric component in latex form, having a high solids content, is developed by increasing the solids content through centrifugation and incorporating synthetic rubber, which enhances viscosity and stability, allowing for uniform additive manufacturing and improved mechanical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If viscosity is controlled to facilitate printing, then printability is improved, but nozzle clogging from agglomeration occurs
Solution Approach 1:
The patent modifies the chemical composition parameters of the rubber latex by incorporating specific additives (surfactants, dispersants, plasticizers) and controlling molecular weight distribution to achieve optimal viscosity that enables printing without causing nozzle clogging
Solution Approach 2:
The patent introduces intermediary substances such as surfactants and dispersants that mediate between the polymer particles and water, preventing agglomeration while maintaining appropriate viscosity for printing operations
2Manufacturing precision
If solids content is increased to reduce shrinkage, then dimensional accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The patent performs preliminary concentration of rubber latex to high solids content (70-90%) before the printing process, and incorporates all necessary additives during this pre-formulation stage, so that the actual printing process can proceed without complex real-time adjustments
Solution Approach 2:
The patent creates a composite ink formulation combining rubber latex with specific additives (surfactants, dispersants, plasticizers, crosslinking agents) that work synergistically to achieve high solids content while maintaining printability and reducing shrinkage
3Quantity of substance
If conventional rubber latex is used, then material availability is improved, but thermal stability and chemical resistance are insufficient
Solution Approach 1:
The patent formulates a composite rubber ink that combines conventional rubber latex with synthetic rubber components and functional additives, creating a material that retains availability while achieving enhanced thermal stability and chemical resistance through the synergistic properties of the composite formulation
Solution Approach 2:
The patent modifies the chemical structure and composition parameters of the rubber material by incorporating crosslinking agents and stabilizers that enhance thermal and chemical resistance while maintaining the base rubber's availability and processability
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 high solids content rubber ink formulation reduces material shrinkage and agglomeration, resulting in improved dimensional accuracy and durability of printed rubber parts, suitable for applications like tires and sensors, with enhanced thermal and chemical resistance.
Implementation Method 1
increasing the solids content through centrifugation
Data Source
AI summary
A composition for a direct ink writing includes a polymeric component in latex form, where the latex includes greater than 75% solids content; and additives adapted to provide the composition with capability of being utilized as a rubber ink formulation for the direct ink writing process. A method of producing an additive manufacturing product includes steps of providing an initial polymeric component in latex form, where the initial polymeric component in latex form includes from about 50% to about 70% solids content; removing water from the initial polymeric component in latex form to thereby form a subsequent polymeric component in latex form, where the subsequent polymeric component in latex form has greater than 75% solids content; and mixing the subsequent polymeric component in latex form with additives adapted to provide a rubber ink formulation composition; and additive manufacturing the rubber ink formulation composition to thereby form a green component.