Technical Information

Etingal® L


Chemical nature
Fatty acid polyether.
Odour: Weak, aromatic.
Active content: 100 %.

Areas of application
Versatile defoamer for the paper industry.

Etingal L is supplied in liquid form. It suppresses foaming in coating coloursand in preparations applied to paper inthe size press. It can also be used as adefoamer and stock deaerator in papermaking.

Technical data

This information only indicates a typicalproperty of the product and MUST NOTbe taken as specification.

Applications
Etingal L is easy to emulsify. Emulsions of Etingal L do not have any tendency to cream unless they are left to standfor long periods. Etingal L is 100 % active and contains no diluent. It does not release any volatile substances orflammable vapour, provided the temperature does not greatly exceed 100°C, and no problems with odour can be expected.
Etingal L is long-acting. It is usually added at a very early stage in the processin order to prevent foam being formed from the outset.

a) Coating colours

Etingal L can be added to pigments when they are being made up into aslurry. It has to be added in such a way that it is able to disperse homogeneously. It normally needs to be added atlevels of only 0.02 - 0.03 %, expressedas a proportion of the pigment. The viscosity of coating colours can undergo a slight increase if Etingal L is added at levels in excess of 0.05 %. Etingal Lcannot be used to defoam or deaerate coating colours once they have been mixed, and Etingal S should be used instead.

b) Surface-sizing preparations appliedin the size press

Etingal L is easy to use, and it can be added at any point during or after mixing.It is usually sufficient to add 10 - 20g of Etingal L per cubic metre of preparation.We would recommend diluting Etingal L 10 : 1 with water before adding it to preparations that cannot bestirred vigorously before they are applied.

c) Papermaking
Etingal L is self-emulsifying, which means that it can be added to the stock direct by means of a drip feed or metering pumps. It can also be added to the white water. In either case, the flow at the point at which it is added, or just downstream of this point, should be sufficiently turbulent for it to be homogeneously dispersed. It should be diluted1 : 10 (Etingal L : Water) with water if it does not pass through any zones of turbulence. Generally speaking, less than 0.05 % is required, expressed as a proportion of the fibres.There is a danger that sized paper will be desized if it is added at concentrations above this level.


Storage:
The solids have an occasional tendency to crystallize out of solution at temperatures below 10 °C, but they can be reconstituted by heating the liquid to 60°C.

This product should not be stored at temperatures below 10 °C.

Storage stability: 1 Months

On the basis of our experience, we would recommend the following materials for pipes, pumps and tanks.
Stainless steel: AISI 316 Ti, AISI 321or other high-alloy steels
Other metals: Aluminium
Plastics: Polyester such as Palatal®,PVC and polyethylene.