DNP to Launch Weather and Wear Resistant Resin Glass for Automobiles

Dai Nippon Printing Co., Ltd. (DNP) has developed a hard coat transfer film that improves weather and wear resistance by transferring to resin glass1, and will launch sales of the resin glass in February 2016.

The resin glass is equipped with advanced weather and wear resistant features, and also makes it possible to reduce ultraviolet (UV) derived deterioration. The newly developed hard coat transfer film has been adopted for use with resin glass in automobile windows.


DNP has positioned Lifestyle and Mobility as one of business growth areas. Along with residences, work places, schools and commercial facilities, the Company is also endeavoring to ensure comfort in moving spaces, such as automobiles and trains. And at the same time, we are also looking to create information services that can be accessed anywhere, anytime. In the automobile area, the Company currently offers decorative film for interior purposes and a viewing angle control film targeting in-vehicle displays. In addition to these efforts, DNP has also moved to strengthen its business base. In August, 2015, Tamura Plastic MFG Co., Ltd., which maintains a substantial domestic share in side visors attached to the upper portion of automobile windows, became part of the DNP Group.

Apart from maintaining superior anti-shock and thermal insulation properties, the weight of the resin glass is approximately half that compared to existing glass, and we are seeing increased needs for use as window glass in train carriages, construction equipment and automobiles.

While polycarbonate resin glass has superior processing features, it presents the challenge of being inferior to standard glass in the areas of weather resistance to sunlight and the elements, in hardness and also anti-scratching features. In answer to these challenges, DNP has leveraged unique Electron Beam (EB) technology2 developed through the manufacture of materials for housing, and has successfully developed a film that improves weather and wear resistance by transferring this to the surface of resin glass. The Company will market the resin glass to which this film has been transferred.

[Features of Newly Developed Resin Glass]

  • It has been made possible to configure a hard coat layer which has high hardness by using EB technology, which compared with polycarbonate resin used in generic products, is more difficult to scratch due to improvements in surface wear resistance. At the same time, it has also been made possible to improve weather resistance, including UV-derived discoloration and deterioration.
  • By molding the resin glass at the same time as transferring the film, it has been possible to reduce processing costs.
  • As the newly developed product is plastic, the weight is approximately half that of glass, while maintaining a similar transparency to glass.
  • The newly developed product exhibits superior anti-shock features, and as there is little possibility of shattering, means that it also maintains superior safety features.

Weather resistance testing - comparison

DNP product (at left) remains transparent, while the generic product (at right) is discolored.

* Weather resistance testing : xenon arc lamp 1,300MJ/m2(2,000hours) (JIS K 7350-2 : 2008 compatible)

Wear resistance testing (steel wool) - comparison

DNP product (below) shows no scratching, while the generic product (above) is scratched.

* Wear resistance testing: steel wool with a load of 1kg, 1,000 reciprocations (DNP measurement)

[Forward Looking Events]

DNP will market the newly developed resin glass for use in railway carriages, construction equipment, automobiles and busses, aiming for total sales of 1.0 billion yen by FY 2017.

1: Resin glass: Not a general glass based on silicic acid, but an organic glass based on plastics such as polycarbonate.
2: EB technology: A coating technology used in the hardening of irradiated resin. Compared to products coated with urethane or UV resin, EB technology makes such products more resilient against scratching, fouling and sunlight, and makes it possible to ensure advanced resilience and practical performance, and stable quality properties. EB technology is a next-generation eco-friendly technology that facilitates energy savings in the manufacturing process, reduced CO2 emissions and solvent free coating.  
* Product prices, specification and service contents mentioned in this news release are current as of the date of publication. They may be changed at any time without notice.