Fine Chemicals - Resin Fillers

Summary of uses

Clay (smectite) has a sheet-shaped crystal structure that spreads in two dimensions. By dispersing the clay with this structure in organic polymer materials, high value can be added to them. Because of its ability to improve the mechanical properties or gas barrier property of resin or to make resin flame or heat resistant, the clay has been used in various fields.

Image of montmorillonite crystals

Expected effects

The ratio of clay added as a resin filler is only a small percent. Generally, clay is added by the polymerization method of polymerizing monomers in the presence of dispersed clay or the melt compounding method of dispersing clay directly in a polymer. The way clay is dispersed in a resin depends on the chemistry between them and the machine specifications, and needs optimizing. By using a dispersion medium that has an affinity with both the polymer and clay, the clay can be dispersed in the polymer relatively easily.
On the other hand, if the content of clay is increased, its properties such as a barrier property, heat resistance, and dimension stability are exhibited more prominently.

Concept of properties influenced by the clay content

As an example, relationships between the gas barrier property and content of clay are shown below. The gas barrier property depends on the resin type (or its barrier property or other properties) and the clay type (its aspect ratio and other properties), but is improved with increases in clay content and reaches the maximum value at around a clay content of 60 to 80w%. In some cases, adding clay resulted in a 105-fold improvement in gas barrier property compared to resin alone with no clay added.

Clay content and Gas barrier property(FVZ films)

We aim to develop new materials, find their new uses, and make things that take advantage of material characteristics by combining clay and resin with different characteristics or inorganic and organic-hybrid compounds.

Product lineup

Product name Category
KUNIPIA-F Refined bentonite
KUNIPIA-G Refined bentonite
SUMECTON-SA Synthetic saponite
SUMECTON-ST Synthetic stevensite
SUMECTON-SWN Synthetic hectorite
SUMECTON-SWF Synthetic hectorite
KUNIVIS-110 Organic bentonite
MOISTNITE-WO Organic bentonite
SUMECTON-SAN Organic synthetic hectorite
SUMECTON-STN Organic synthetic hectorite
FVZ(Developed product) Barrier coating