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"Grafton" is a world-patented technology that uses electron beam graft polymerization. The target substance is inexpensively chemically adsorbed on a molecular level. Grafton technology, which has been successful in converting electron beam graft polymerization that was once "high-performance, high-cost" to "high-performance, low-cost," is described herein. Through joint research with Professor Masahiro Hori of Yokohama National University1, this research has been presented to academic meetings and is already used for practical purposes as a counter-technology for VOCs, such as formaldehyde, etc., and as a measure against sick houses.
(1)High-speed
The direct-contact surface area between the target substance and the functional groups is large and adsorption speed is fast.
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(2)Large-capacity
The capacity of effective functional groups by weight is high. It is 150 times that of the same weight of active carbon in terms of NH3 gas.
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(3)No desorption
There is none of the desorption of adsorbed substance that occurs with active carbon for physical adsorption because it is chemical reaction-based adsorption.
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(4)Long durability
Durability is long because functional groups retain their effectiveness without being released from the substrate.
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(5)Wide-ranging applicability
Forms including liquid, granules, sheets, gels, etc. are possible, depending on the choice of substrate.
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| Conventional type |
Property items |
Grafton |
| × |
Adsorption speed
（Contact surface area） |
○ |
| × |
Total adsorption capacity
（Amount of effective functional groups） |
○ |
| × |
Economics
（Adsorption performance/unit price） |
○ |
| × |
Durability
（Property stability） |
○ |
| × |
Toxicity
（Molecular weight, diffusion） |
○ |
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