Our Technology

Encapsulants for PV Solar Cells

As interest in measures that prevent global warming grows, natural energies, including solar batteries, are garnering much attention worldwide. As a result, C. I. Kasei is ambitiously targeting new business segments, such as the manufacturing of ethylene vinyl acetate (EVA) sheets used in solar battery modules, that apply technologies it has amassed in agricultural films and waterproof geomembranes.

Our successful development of the CIKcap^® EVA sheet represents a culmination of these efforts, as it greatly reduces the occurrence of defective modules. Currently, we are moving forward with a project to establish the groundwork for the mass production of these sheets overseas.

■Solar Battery Module Architecture and EVA Sheets

Solar battery modules consist of glass, EVA sheet, silicon PV cell and backsheet. At only 150 microns thick, the silicon PV cell is extremely thin and fragile, meaning the cell is susceptible to cracking or damage if the EVA sheet shrinks during hot press production at 150 °C. C. I. Kasei has developed a unique proprietary production method that integrates its EVA molding and compounding technologies to produce EVA sheets with long-term durability and minimal thermal shrinkage.

LED Lighting

C. I. Kasei, commanding its compounding technology for fluorescent film and electrode wiring technology, has developed a high-intensity LED package featuring even light quantity, broad color temperatures and high color rendering. We also develop and manufacture customized LED light xture solutions tailored to usage and location, which represents another aspect of our active approach to the commercialization of LED lighting solutions.

■LED Package Architecture

C. I. Kasei has developed a proprietary high-intensity surface mount device (SMD) LED package that features a blue LED chip with its compounded fluorescent film sheet, as well as its established ribbon electrode wiring technologies.

Outline of Technology Development and the History of New Produts

1965	Installs first calendar machine in the Shiga Factory to begin production of agricultural PVC films.
1967	Installs equipment acquired from Bruckner of Germany to produce biaxially oriented films.
1968	Launches production and sales of shrinkable packaging film BONSET.
1969	Installs second calendar machine at the Shiga Factory for the production of agricultural PVC films.
1973	Acquires technology from Renolit AG of Germany, launching the Renolit business(currently the decorative materials business).
1974	Construction completed on the Renolit Plant(currently the Decorative Materials Plant)located within the Shiga Factory.
1975	Installs third calendar machine at the Shiga Factory for the production of surfacing material and edge banding tape. Launches production and sales of RENOPLAS edge banding tape and surfacing material. Establishes the Technology Research Center(currently the R&D Center).
1978	Launches sales of mist-proof agricultural PVC film Sky-eight-8. Launches sales of water swelling waterstop material Vynon Aquatite.
1980	Launches sales of architectural design film with adhesive BELBIEN.
1982	Launches sales of water swelling rubber waterstop material Vynon Aqua ATR (currently Vynon Hydrotite).
1988	Receives patent for mist-proof agricultural PVC film.
1989	Begins production and sales of precision motors.
1990	Launches production of shrinkable films at Bonset America Corporation.
1993	Launches production and sales of decorative laminate sheet for housing equipment Bonlex.
1995	Begins production of water swelling rubber waterstop material Vynon Hydrotite at its Tochigi Factory.
1996	Begins production of precision motors at Shanghai CIK Precision Motor Co.,Ltd. (currently Shanghai CIK Electronics CO.,Ltd.).
1998	Construction completed on the Agricultural Polyolefine(PO)Film Plant at its Shiga Factory.
1999	Begins production of shrinkabele films at its Okayama Factory.
2008	Begins production and sales of LED packages. Launches production of Bonlex at BONLEX EUROPE S.r.l.in Italy.
2009	Develops encapsulants for PV solar cells CIKcap®. Construction completed on the Encapsulant Plant at its Tochigi Factory.

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