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| Papermaking
Process |
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Chemical additives
are widely used in the papermaking process
to obtain specific characteristics and properties
in finished paper products. The number and
variety of chemical additives used are as
large and varied as the different types of
paper produced. The ability to precisely control
the flow of these additives is essential for
producing a high quality paper product without
continuously overfeeding expensive process
chemicals.
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| Industry Challenge |
| To obtain proper characteristics,
precise amounts of chemical additives are
injected at various stages of the papermaking
process. Dyes and pigments add color and effect
brightness. Perfumes add scent to facial tissues,
toilet paper and advertising inserts. Bleaching
agents, such as hydrogen peroxide, add increased
brightness to recycled, de-inked stock. Sizing
agents add water repellency and strength,
while emulsifiers are used to ensure proper
mixing and distribution of the sizing agents. |
| The inability to accurately
control the amount of additive used typically
results in average product quality while continuously
overdosing expensive additives to prevent
underdosing. Too much or too little dye or
pigment may result in unacceptable color variations
or finish quality. Over-spraying of expensive
perfumes increases waste and material costs.
Improper blending of sizing agents or de-inking
surfactants may result in foaming. Consequently,
the finished product is wasted, resulting
in an increase in material, operation and
maintenance costs as a replacement product
is manufactured. |
| The Zenith Solution |
| A Zenith precision metering
pump is the pump of choice for accurately
controlling the flow of chemical additives.
Zenith gear pumps provide precise, repeatable
and pulseless fluid flow. Precision ground
and lapped components produce extreme accuracy,
linearity and repeatability under varying
process conditions. Stainless steels or hardened
tool steels offer excellent corrosion and
wear resistance. The result is smooth and
accurate flow that virtually eliminates over-dispensing,
over-spraying, improper blending and improper
mixing. |
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