UV Curing Resin for Imprinting (Mold Release, Adhesion)  "SANRAD"

UV Curing Resin that Combines Mold Releasability and Base Material Adhesion to Enable Fine Imprint Molding

What is Great about Sanyo Chemical's UV-curable Resin for Imprinting "SANRAD" 


UV Curable Resin for Nanoimprinting with High Mold Release Property Enables Transfer of Complex and Fine Patterns

Our UV curable resin system "SANRAD" products are formulated with a special mold release agent uniquely designed by utilizing our specialty surfactant technology, which provides high mold release performance against molds. 

Benefit from high mold release
  • High-precision transcription is possible even for special shapes and fine patterns.
  • Resin does not remain in the mold, reducing wear and preventing deterioration of the mold.
  • When the resin is UV cured and released from the mold, it is also less likely to be subjected to stress and thus less likely to chip or crack in shape. 

Example of Imprint Film Molding

UV curable resin compatible with various molds and capable of transferring fine patterns. 

Mechanism of Action of High Releasability

Our proprietary phosphorus-based special mold release agent is designed to selectively collect on the mold side, resulting in high mold releasability, but with high adhesion to the base film. Furthermore, the resulting UV-cured resin moldings are characterized by long-term stability in both shape and quality. 

Selective Orientation of Mold-releasing Components on UV-cured Resin Surfaces

Sanyo Chemical's UV Curable Resin for Imprinting Introduction Video (Approx. 2 min.)

About UV Curable Imprint Transfer Method

The imprint transfer method is a method of creating a pattern on the surface of a material by pressing a mold with a microscopic pattern on its surface onto a resin and then cured. The imprint method is attracting attention in various fields such as semiconductors, recording media, biotechnology, and optical materials, because it is a simple process that enables large-area microfabrication with excellent processing accuracy. 

In the case of UV cured imprint transfer, UV cured resin is applied to a base film such as PET film, pressed against a mold, UV irradiated and cured, and then released to produce a film with a fine pattern. 

Advantages of UV-cured Imprint Transfer

Compared to the thermal imprinting method, it does not require high heat, making it applicable to heat-sensitive materials. Can be used for fine patterns and can be manufactured in a short time, making it superior in energy efficiency. 

Requirements for the Main UV Resins for Imprinting

  •  Ability to enter the mold in liquid state 
  •  Ability to be released from the mold 
  •  Adhesion to base film 
  •  Dimensional stability 

UV Curable Resin for Nanoimprinting with High Scratch Resistance

Optical films are required to have not only optical characteristics as optical components and processability such as transferability, but also abrasion resistance (scratch recovery), such as the ability to quickly recover from contact with other materials in the manufacturing process or from scratches on the final product. 

In the "SANRAD" products, we have also developed a grade that exhibits high scratch recovery through elastic recovery. By nanodispersing a special monomer in the resin, the resin itself has high flexibility, but it also has high resilience, and has the ability to recover from scratches. As shown in the figure, films molded using this resin have excellent scratch resistance (scratch recovery), making it an optical film that contributes to improved yield and product reliability during manufacturing. 

High Recoverability of Scratches after Transfer, Contributing to Yield Improvement

Electron Microscope Images before and after Abrasion Resistance Test

About the Main Lineup of the "SANRAD" Products

Our "SANRAD" products offer a diverse lineup of products with a variety of performance options to meet your application and needs.

In addition to being able to control the refractive index of light, which is an important factor in optical properties, the "SANRAD" products have the unique advantage of bringing out a variety of performance features that add value to optical films, including mechanical properties such as flexibility toughness, and reliability such as light resistance and color/shape durability. 



Excellent ductility, ideal for molds with complex shapes Excellent repairability
SANRAD products RM TS-01 TS-02 FM-01 TF-01
Product Properties Viscosity
4500 2200 4200 790 500
After cured Mechanical properties Tensile modulus (MPa) 850 2000 1200 480 80
Elongation at break (%) 22 22 45 8 2
Tg (℃) 53 57 52 49 40
Optical properties Total light transmittance (%) 91 91 90 92 91
Haze % 0.3 0.3 0.2 0.2 0.3
Refractive index nd25 1.55 1.56 1.57 1.51 1.50
Adhesion on substrates Easy-adhesion PET 
  •  Cured material creation conditions: D bulb 1000mJ (320mW/cm2) 
  •  Tensile modulus, elongation: film thickness 200 μm, measured by autograph in accordance with JIS K6251 (dumbbell type 3) 
  •  Tg: 5 mm wide and 1 mm thick strips, measured with a Rheogel 
  •  Refractive index: Measured with a refractometer at 589 nm 
  •  Total light transmittance, haze: film thickness 10μm, measured by haze meter

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