Retention Aid

Purpose of retention and filtration control

The goals of retention and filtration aids vary depending on the type of paper machine and product. Based on PM’s practical application experience in many domestic packaging paper mills, we believe that the factors that need to be considered include the following:

• Retain fibers, fine fibers, and fine particles
• Improve the water filtration performance of slurry and increase the utilization rate of raw materials
• Reduce sedimentation problems and keep white water system clean
• Reduce COB and BOD of drainage outside the workshop and reduce the load of sewage treatment
• Increase paper machine speed, increase production and reduce steam consumption
• Improve product quality and reduce overall costs

With reference to the actual use experience of domestic and foreign manufacturers over the years and based on the actual situation, PM has designed a retention and filtration control process for your factory. This solution also covers all the above requirements.

Dual retention aid

PM-3569 emulsion organic particles are a kind of high-efficiency molecular emulsion polymer, which can effectively combine with fine materials in pulp to promote the retention of fillers, fine fibers and wet chemical additives. It can improve the running performance of paper machines, extend the service life of nets and blankets, reduce the steam consumption of drying cylinders, and increase the speed and output. This product is widely used in various papers such as corrugated paper, boxboard, coated paper, newsprint, writing paper, etc.

PM-7678 retention aid is a non-toxic, medium-charged high molecular weight polyacrylamide polymer with excellent solubility. It can improve the retention of fine fibers, CaCO₃ , TiO₂ and kaolin at the wet end, provide a stable wet end environment, improve paper sheet uniformity and paper performance, improve water filtration during paper sheet forming and pressing, thereby saving energy consumption during the drying process, reduce white water solid content, improve raw material yield and recovery system efficiency, have a wide pH adaptability, and can provide a stable positive charge, whether in alkaline, acidic systems or neutral papermaking systems, improve the retention of wet-end colloid substances, thereby improving the efficiency of sizing agents and dyes, increasing paper machine output, and improving paper machine operating performance.

Using PM-7678 + PM-3569 dual retention system on packaging paper machine will bring the following main benefits

• Improve the first pass retention rate of paper machine pulp and fine fibers
• Improve water filtration during paper sheet forming and pressing, thereby saving drying steam energy consumption
• Can reduce white water concentration, improve slurry yield and recovery system efficiency
• Improve paper machine operating performance and reduce paper machine system operating load
• Provide a stable wet end environment to improve paper uniformity and paper performance
• Improve the efficiency of other wet-end papermaking chemicals