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3D Printing White Photosensitive Resin

The photosensitive resin material is a special 3D printing material for SLA rapid prototyping, SLA three-dimensional printing 3D printing molding, also known as liquid photosensitive resin selective curing, usually abbreviated as light curing molding. SLA technology is based on the light curing principle of liquid photosensitive resin. This resin material can quickly undergo cross-linking reaction under the irradiation of a certain wavelength and intensity of ultraviolet light (laser wavelength is in the ultraviolet band, enter 325nm) to produce a cured product.

The materials for photosensitive resin SLA are generally liquid photosensitive resin, such as photosensitive epoxy resin, photosensitive vinyl ether, photosensitive epoxy acrylate, photosensitive acrylic resin and so on. The photosensitive resin is composed of two parts, namely photoinitiator and resin (resin is composed of prepolymer, diluent and a small amount of additives). When the photoinitiator is irradiated by ultraviolet light of a certain wavelength (3oonm-4oonm), it absorbs light energy, changes from the ground state to the excited state, and then generates active free radicals, which initiates the polymerization and curing reaction of the prepolymer and the active monomer; diluent It is mainly used for diluting to ensure that the photosensitive resin has sufficient fluidity at room temperature so that it can flow evenly before making the next layer.

The amount of photoinitiator and diluent has an important influence on the curing speed and curing quality of the photosensitive resin. Within a certain range, increasing the amount of photoinitiator can appropriately speed up the curing speed, but if it exceeds a certain range, continue to increase, and the curing speed will not increase, but decrease; the amount of diluent has a greater impact on the leveling speed of the liquid. If it is too large, the viscosity of the liquid will decrease and the leveling will be good. However, when the amount is too large, the linear molecular chains will be spaced too far apart, and the chance of cross-linking when they meet each other will decrease, which will inevitably affect the curing speed and quality. The proportion of photoinitiator and diluent is appropriate, not only the curing speed is fast, but the curing quality is also better.

The selection of photosensitive resin materials requires the following performance characteristics: rapid curing under the irradiation of a certain frequency of monochromatic light, with a small critical exposure and a large curing penetration depth; the curing shrinkage is small, and the curing shrinkage causes the parts to deform and warp. Curving, cracking, etc., which affect the accuracy of molded parts. Low shrinkage resin is conducive to molding high-precision parts; low viscosity, low viscosity during molding is conducive to resin leveling on the cured layer; low swelling, wet molded parts The swelling in the liquid resin causes the part size to be too large; the rapid prototyping part must have sufficient strength and good surface finish, and be less toxic during molding and so on. Of course, after molding and cleaning, it is non-toxic and pollution-free, so don’t worry about using it.

3D Printing Technical Parameters

  • 1. One-time forming printing size: usually 600x600x400mm; maximum one-time forming 1600X800X600mm without splicing
  • 2. Printing layer thickness: 0.05mm~0.25mm;
  • 3. Achievable accuracy: molding accuracy: ±0.1mm (L≤100mm) or ±0.1%×L (L>100mm)
  • 4. Post-processing: easy polishing, spraying, electroplating, drilling, large size objects can be spliced;

Features Of Photosensitive Resin Material

It is a photosensitive resin material similar to ABS, with an opaque white appearance and durability. These printed parts can be polished, painted, sprayed, electroplated, and are very close to ABS engineering plastics.

The mechanical properties of photosensitive resin

Technical performance Test methodMetric
Tensile strengthASTM D638M45.7 MPa
Elongation at breakASTM D638M7.9 %
Elongation at yieldASTM D638M3.5 %
Modulus of ElasticityASTM D638M2,460 MPa
Poisson’s ratioASTM D638M0.23
Bending strengthASTM D790M68.9 MPa
Bending modulusASTM D790M2,250 MPa
Izod impact strength, notchASTM D256A23.5J/cm
HardnessASTM D2240N/A
Graves tearingASTM D1004123,000 N/m
Water absorptionASTM D570-980.24 %

Thermal and electrical performance

Technical performance Test methodMetric
C. T. E. -40°C – 0°CASTM E831-0067 μm/m-°C
C. T. E. 0°C – 50°CASTM E831-0093μm/m-°C
C. T. E. 50°C – 100°CASTM E831-00156 μm/m-°C
C. T. E. 100°C – 150°CASTM E831-00180 μm/m-°C
Dielectric constant 60HzASTM D150-983.9
Dielectric constant 1KHzASTM D150-983.7
Dielectric constant 1MHzASTM D150-983.5
Dielectric strengthASTM D149-97a31kV/mm
Glass transition temperature TgASTM D1545-0044°C
Heat distortion HDT @ 0.46 MPaASTM D648-98c53°C
Heat distortion HDT @ 1.81 MPaASTM D648-98c48°C

*The above photosensitive resin properties are commonly used physical properties. Of course, there are models with high temperature resistance, high hardness and high flexibility to choose from.

*All values are taken from the documentation provided by the manufacturer of the special material. PTJ 3D printing company. No claims are made to the accuracy of these data, as each individual application may vary. If you have any questions, please contact the manufacturer to give specific product information.

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Why Choose Our 3D Printing White Photosensitive Resin Service?

PTJ meets or exceeds the quality standards of the world’s most demanding industries with our state of the art equipment and quality standards. Our precision and productivity is made possible by our ultimate success factor: the presence of skillful, knowledgeable PTJ experts in White Photosensitive Resin 3d printing and more additive manufacturing parts.

Why Choose 3d-printing-china.com Service

3d-printing-china.com – As an accomplished 3d printing company and Additive manufacturing shop, PTJ has been specialized in OEM 3d printing, custom 3d printing parts production and rapid 3d printing services China for over 10 years and always maintaining the highest standard in delivery speed and reliable quality of precision additive manufacturing components. With the help of high-level technology and efficient equipment, as well as rigorous attitude, we passed the ISO9001:2015 quality certification, which supports the long-term development of Our SLA 3d printing services, SLS 3d printing services, fdm 3d printing services, DLP 3d printing services, SLM 3d printing services, MJF 3d printing services, 3d printing China custom parts and service, small prototype parts customized, etc. 3d-printing-china.com professional 3d printing involves metal 3d printing, plastic 3d printing, and some difficult materials. Our 3d printing products can be utilized in a broad range of industries.

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Free 3D Printing Quote Process

Upload drawing files (PDF, DXF, IGES, STEP). You can easily register multiple drawings at once with the drawing file batch registration (EDI).

  • * Supports drawing uploads in file formats “.pdf”, “.jpg”, and “.png”.
  • * Supports file uploading and loading of 3D (3D) CAD data “.igs” and “.step”.
  • * Supports file uploading of two-dimensional (2D) CAD data “.dxf” and “.dwg”.

Quotation confirmation / order

The shortest estimate from drawing data. Check the quotation on a PC etc. and place an order (order).

* Estimates can be confirmed from the member-only management screen (PC, smartphone, tablet).

Started 3D Printing/Rapid Prototyping and production

After accepting the request, Rapid Prototyping and manufacturing work is started by a specialist in 3D Printing,Cnc Machining, prototyping, and equipment.

You can monitor the progress from your PC, smartphone, tablet, etc.

Finished product inspection / shipping

Processing and production completed. After a strict check, we will promptly deliver to the designated delivery destination. Please look forward to the arrival of the finished product.

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