Anionic Surface Sizing Agent Paper Surface Sizing Manufacturer in Shandong

Product Description

Product Name: GT830 Surface Sizing Agent

Chemical nature: Anionic acrylonitrile-acrylic copolymerdispersion
 

Physical form: mobile, yellow brownish dispersion

Ionic charge:  Anionic

Miscibility with water: Miscible with water in all proportions if stirred Low-temperature stability: Not resistant to frost

Description

Synthetic surface sizing agent used for paper and board-production. GT830 can be used in combination with anionic and nonionic auxiliaries that are used in surface sizing formulations. Compatibility tests are recommended.

Technical Data

pH*  ca. 3- 5

App. Viscosity*  ca.≤50 mPa•s

Solids content* ca. 29 -31%

* For detailed information see Specification Data Sheet

Applications

GT830 is usually applied with starch in the size press. Its starch-compatibility can be tested by mixing it with cooked starch solution and leaving it to stand for minimum six hours in a sealed vessel at ca. 50°C in a drying cabinet. Experience has shown that the mixture heated >75 °C might display impaired sizing performance and stability.

The pH of preparations used for surface sizing should not exceed 6.0 - 6.5. GT830 is versatile as it performs very well on paper made from unbleached pulp, waste paper (DIP)wood-containing pulp (BCTMP) and also on paper

made from neutral woodfree pulp.The paper does not necessarily have to be sized at the wet end before GT830 is applied, but this can be an effective means of controlling size press pick-up. The sizing effect is independent of alum content in the wet end.

GT830 can also be used to size paper glazed on one side only with-out affecting the smoothness.Paper sized with GT830 is resistant to acid inks and alkalis. The sizing performance is fully developed after the drying section.

Apart from providing sizing, combinations of GT830 and starch can also enhance the surface of paper and board by increasing its wet pick strength, reducing the linting and improving the printability of paper.

It is generally recommended to apply GT830 at a concentration of no higher than 5 g/l together with 50- 100 g/l of starch in order to obtain a hard-sized paper.

GT830 is low-foaming, however, the use of a defoamer is recommended as mill conditions may vary. The use of an emulsion type is preferred.

Storage:

GT830 must be protected from direct sunlight. It should be stored in a cool place and protected from freezing.

The headspace of bulk storage tanks must be kept saturated with water vapour. Customers interested in purchasing this product in bulk should consult our leaflets on "The handling and storage of polymer dispersions".

Materials:

According to our experience to date, stainless steel (AISI 316 Ti or AISI 321), polyethylene and polypropylene can be used for tanks and pipework.

Acid resistant ethylene-propylene-diene terpolymer rubber (EDPM) can be used for the stators of progressive cavity pumps.

GT830 contains acetic acid. Safety glasses must be worn when handling this product in its undiluted form.