Do polyethylenimine and polyaluminium chloride influence wet end system and paper properties?

The influences of polyethylenimine (PEI) and polyaluminium chloride (PAC) on wet end system and paper properties were discussed based on circulating white water, neutral sizing, double component retention and drainage aid system, filler loading and so forth.

Which polyamine is used as a retention aid in the paper industry?

The polyamines employed as retention aids in the paper industry are usually polycondensation products of amines and short-chain crosslinking agents, which normally contain chlorine. The simplest represen tatives of this group of substances are the condensation products of ethyl enediamine and dichloroethane .

What is a paper retention aid & how does it work?

It improves the runnability of paper machines by fixating resinous pitch and other sticky substances to fibres and fillers, thus preventing them from being deposited. Unlike most other retention aids, the species responsible for improving retention does not form a solution in the 4-8 pH range at which paper is normally produced.

How cationic papermaking additives affect a polyelectrolyte complex?

The anionic trash can form polyelectrolyte complexes with cationic papermaking additives, thus resulting in a low efficiency of cationic additives, increased wet end chemical cost, reduced drainage, poor product quality and inconvenient manipulation of papermaking machine [4-7] .

How can anion trash catcher reduce particle charge in rejected pulp?

The anion trash catcher has the role of reducing the value of particle charge in the rejected pulp. In this study, the following variations were used: blank (without PAC), 1 kg PAC/ton paper, 2 kg PAC/ton paper, 3 kg PAC/ton paper, and 4 kg/T paper. The method is first adding PAC to the pulp and then giving retention aid afterwards.

How do I choose the best paper retention aid?

Paper quality, especially formation, is an equally important point to be considered alongside retention and drainage. The basic chemical and physical principles of retention provide a very useful guide to selecting the best retention aid from the many different types available.