What Kind Of Resin Is Used In 3D Printing Materials?

Resin is one of the important materials for 3D printing and is mainly used in photocuring technology.

Common types of resins used in 3D printing

1. Acrylate Resin

This is the most common and main type of resin, and almost all SLA/DLP resins are based on it.

Main components:

• Monomers: acrylates, methacrylates (such as HEMA, TMPTA, HDDA).
• Oligomers: epoxy acrylates, polyurethane acrylates, polyester acrylates.
• Photoinitiators: TPO, BAPO, irgacure 1173, etc.

Features:

• fast curing speed
• high molding precision
• adjustable transparency, color and flexibility
• low cost

Disadvantages:

• has a slight odor
• average toughness after curing

Applications: Prototyping, models, dental models, and general consumer 3D printing.

2. Epoxy Acrylate Resin

This is a higher-performance modified resin commonly used in industrial printing.

Advantages:

• lower shrinkage
• excellent adhesion
• high mechanical strength
• excellent chemical resistance

Applications: Industrial prototypes, molds, electronic components, and functional parts.

3. Polyurethane Acrylate Resin

This is a highly tough photosensitive resin system.

Advantages:

• combines flexibility and strength
• impact resistance
• adjustable hardness

Applications: Elastic parts, flexible structures, insoles, and biomimetic compoents.

4. Epoxy-based Photopolymer

By introducing acrylic functional goups into epoxy resin, it becomes photocurable.

Advantages:

• high heat resistance (Tg can reach over120℃)
• high strength, low shrinkage
• excellent stability

Applications: Industrial molds, automotive parts, high-precision engineering components.

Basic Composition of 3D Printing Resin

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