|
Liquid
sodium silicates are versatile and economical adhesives. They are used to
manufacture such products as:
Paper Tubes and Cores
Fiber Drums
Cornerboard, Angleboard
Paperboard Laminates
Paper/Metal Foil Laminates
Corrugated Board
Silicate solutions may be applied either by cascade,
immersion, or transfer roller systems. It is best to use notched scraper bars to
form a thin bead of silicate on the paper. Typically, sodium silicate is diluted
with water to achieve good penetration of the silicate into the paper. As water
from the silicate is absorbed into the substrate and evaporates into the air,
the silicate becomes tacky and sticky. Then the silicate dries to form a hard,
glassy bond.
PQ’s Technical Service Group supports this end use by
providing guidance in product selection, blended products, control of processing
variables (for example, operating temperature and silicate viscosity),
trouble-shooting, safety, and housekeeping.
When tube strength and adhesive costs are at issue, PQ® sodium silicate is the paper adhesive of choice.
Silicate also provides the benefits of being environmentally friendly,
non-toxic, non-flammable, odorless, and resistant to oil, grease, heat, and
microbial activity.
Liquid and powder silicate products are also used as
binders in briquetting, pelletizing, or other agglomeration or forming
applications. As in the paper adhesive application described above, the
dehydration of a liquid silicate results in a sticky glue that hardens as it
dries and bonds particles together. Silicates may also be mixed with setting
agents to obtain binders that are faster setting and moisture resistant. When
powdered silicates like G®, GD®, or SS®200 are
used, the silicates must be dissolved in water before they can provide any
binding power.
PQ’s expertise in silicate chemistry is available to
customers who are optimizing their binder systems or are looking for novel
solutions to binder problems. The wide range of materials that make use of
silicate binders demonstrates their great versatility. Examples include:
|
Foundry Molds and Cores |
Fines for Recycling |
|
Minerals |
Wood Products |
|
Time-released Soluble Fertilizers |
Roofing Shingle Granules
|
|
Refractory Cements |
TV Screen Phosphors |
|
Alloy Charges |
Fly Ash, Slag, Cementitious Products
|
|
Steel Byproducts |
Glass Fluxes |
|
Detergents |
|
| |
|
|
