Anionic polymer micro papermaking retention aid

With the paper machine to speed the development of large-scale, traditional retention, filtration system difficult to adapt. PAM is a compound of high molecular weight low charge, with a positive charge and the retention and drainage effect generated by the bridge linking the fiber flocculation, but the floc formed after the loser pump etc. of high shear damage difficult re-flocculation; on the other hand, a strong fiber flocculation effect also worsen the evenness of the sheet. Another example is the use of two-component system, first with alum A13 + adsorbed on the fiber surface, it is positively charged, then added a polymer compound with a negative charge, so it A13 + fiber and fines combined with a band, and produce Retention of this two-component system is suitable for acid papermaking, neutral or alkaline papermaking on incommensurate. In this context the conditions and adapt the new requirements of the new aid retention, drainage systems have come into being. A new particle retention and drainage system Such systems typically include two components: one is a cationic polymer, such as cationic polyacrylamide; one is anionic inorganic particles (such as anionic silica or bentonite) or anionic microparticle paper feed polymer, its mechanism of action is the first in the high negative charge added cationic polymer to form a highly flocculation fiber body. Then through the slurry stream feeding process, under pressure screen high shear break become micro floc This micro floc particles again in the role of anions, formed as fiber body over flocculation, play Retention of the filter aids. 2 The advantage of using particle retention and drainage system is now particle retention and drainage system cost than conventional units or dual retention system is higher, but the overall look, particle retention and drainage are many advantages , its economic benefits or cost-effective. 2.1 runnability and production capabilities ● improve drainage performance network case unit, vacuum unit and press section; ● improve machine speed and reduce steam consumption of the dryer section; ● white water purification systems to reduce sediment generation; ● reduce wet end breaks. 2.2 ● improvement in product quality evenness of the sheet; ● improve web banner quantitative distribution of water, thereby reducing the stress caused by the sheet edge lifting, curl; ● increase the strength and physical properties of the sheet. 2.3 save raw material consumption ● Reduce steam consumption (improved feed dryer sheet dryness); ● reduce fiber consumption (due to the white water loss reduction). 3 particle retention and drainage of application development and application of particle retention filter aid system more than 20 years of history, generally depending on the second composition (particulate anion), is divided into three. Namely: colloidal silica, bentonite, micro-polymer. Currently in the world, machine application particulate system there are about 600 units, of which 350 paper machine systems use silica fine particles, 250 paper machines using bentonite system, there are a few other machine application of micro polymer systems. If a newsprint mill mix was 50% TMP pulp, 50% of waste paper deinking pulp, pH = 7.1, the use of cationic PAM and an anionic inorganic micro pull PM810, a retention rate to 57%. Here there are companies Fujian Qingshan effect using particle retention and drainage aids system. Qingshan is in a three long network paper machine production kraft paperboard used machine with an annual output capacity of 150,000 t, speed 300 ~ 350m / min, jams quantitative 175g / m2, the surface layer of Kraft, the underlying core for the US waste paper pulp, the cationic polymer (trade name Percal 230HL) add points for the red pump inlet, the amount of 0.3 ~ 0.6kg / t paper, micro pull bentonite add points pressure screen outlet, the amount of 2 ~ 3kg / t paper. Adding additives cationic polymer 0.3kg, particulate bentonite 2kg, total costs increased 0.3 × 36 + 2 × 8 = 26.8 元 / t paper. Ton of paper produced Whitewater 70m3, only the bottom of meter, the cost per ton of pulp 1280 yuan / t, total cost (0.093% -0.057%) × 70 × 1 280 yuan = 32.26 yuan / t paper. Not core pulp, only count the number of underlying pulp can offset rising costs, but also profit 5 yuan / t or so, it is profitable. 4 actively promote particle retention and drainage system using China's paper industry has a production capacity of around 20% has become a modern paper industry. This is part of a micro pull retention, filter aid urgent needs of the majority of other technology level of the last century, mostly 70 to 80 years or earlier. This section uses unit flocculants or dual polymer systems, although they can still meet the low technical requirements, but the use of particle retention and drainage system can be achieved better production results, but the level of equipment and other auxiliary conditions to be appropriate transformation. 4.1 At present China to create the conditions for the width of the paper machine about 3m or narrower, machine speed 300m / min, the use of this type of machine after particle retention and drainage aid system, drainage capacity strengthened, presumably to increase production in order to improve the speed This is the first choice. Some, however, have been rushed mounted pump capacity to the limit, there is no potential to be tapped, which would replace a new fan pump, or even other dewatering element should be replaced, in order to adapt to the increased speed requirements. 4.2 Some species produce a high-end product, higher product quality requirements and improve the evenness of the paper is very important, which may be necessary to further reduce the concentration of the Internet, the use of drainage and retention aids increase dewatering capacity particle, also for the production of a These high-end products to create a certain condition. 4.3 microparticle retention and drainage system, its leading role is varied paper stock charge, to deal with the old system at the time of adoption of new wet end of the state aid understanding, if negative charge the old system is too strong will affect the cation bridge Union action, if the old system cation is too strong, it will not lead to an excess of the cation and also affect retention and drainage effect. The pH 4.4 paper stock is an important factor, different components have different particle suitable pH range, such as silica system, although still plays the role of retention at pH 5, but for best results the pH or alkaline, ie pH6 ~ 9 best. Bentonite system suitable pH range more widely, about pH4 ~ 9 can work. 4.5 Domestic early in the 1970s had developed a variety of products polyacrylamide, cationic starch also been more widespread use of bentonite resources are very rich. Development and full application of these chemicals should belong not hard to do. Anionic polymer micro papermaking retention and drainage aids Product Overview This series of products for micro polymer, can provide excellent retention and drainage performance. The product has a unique micro-crosslinked structure, can be used together as a single component retention aids and cationic starch or cationic or anionic polyacrylamide retention and drainage system consisting of particles. As a micro-polymer type retention and drainage and forming aids that can be used neutral to alkaline papermaking of cultural paper, paperboard, tissue and other production processes. Ultrafine dual paper recommended and I have a unique branched molecular structure consisting of cationic polyacrylamide C800ZH Retention and Drainage System. Micro-polymer product is recommended to add the slurry to final cut point closer to the paper after the forming section, the dosage 0.025-0.2% (based on the paper production and product solution), add a small amount of aluminum sulfate or aluminum chloride Drainage can be controlled better. Technical indicators ACPAFLOC-M211 ACPAFLOC-M300 ACPAFLOC-M311 Appearance Opaque viscous liquid Ion electronegative electronegative electronegative Viscosity cps 0.50% 100 120 150 Apparent Viscosity cps <2000 <2000 <2000 total solid content%> 30 > 30> 30 Density> 1.2> 1.2> 1.2 Solubility good excellent?? performance advantages of liquid micro polymer product, easy to use, excellent value for money. Improve sheet formation, pressing and drying section drainage and dewatering performance, saves energy consumption. Whitewater lower concentration, improve increase pulp yield and white water recovery system efficiency. Under conditions of high filler to maintain and improve retention, drainage and sheet formation. It can easily control the powerful filtration performance filter aid to obtain the best effect, improve machine runnability. It can be produced and used in the production of food contact paper and paperboard. Relative to the solid product, easy to equipment and maintenance management. Relative to the silica particle retention aid class, the product can better adapt to the different types of starch. To maximize access to comprehensive benefits by increasing production and operation of the machine. Product homogeneity is good, there is no settlement, without stirring to dissolve before preparation. Instructions Recommended concentration: The recommended storage period: Preparation dope solution is prepared 1-2 days 0.5-2.0% concentration of 0.05 to 0.20% of the product added 1 year dope mixed before use without stirring, to avoid cold, recommended storage temperature range of 5- between 30 ℃, time of preparation of the polymer solution should be slightly less than 15 minutes to obtain maximum use efficiency. After stirring for use if the product is cold, completely thawed. Packaging and storage Packing: 25kg, 200kg or 1000kg plastic drum packaging products stored in glass, stainless steel, plastic or epoxy containers, can not use iron, copper or aluminum material containers. Storage: Store in a cool ventilated place, namely at 0 ℃ breaking (anti-exposure, frost). Storage period: 12 months. Integrated brand ---- ACPAFLOC series paper retention and drainage (Australia introduced exclusive agent) ---- France SNF SNF papermaking retention aid ---- BASF BASF (formerly Ciba Ciba) Paper Retention Kemira Kemira filter aids ---- ---- American papermaking retention aid Nalco NALCO papermaking retention aid ---- Mitsubishi papermaking retention aid ---- American Ash Portland Ashland (Degussa) papermaking retention aid long-term leadership and world-class suppliers of papermaking chemicals, focusing on the accumulation and Germany's BASF BASF, Ashland Ashland, Ciba Ciba, the United States Nalco NALCO experienced Finnish Kemira Kemira other world-class enterprise cooperation. Papermaking retention aids include Britain, France, the United States, Germany, South Korea, the world's high-end technology products, the introduction of Australia's more exclusive class products more cost-effective advantage of the company consisting of independent brands. The company of "puerile" principle, the products are widely used in rotary machine, fourdrinier paper machine production culture paper, corrugated paper, cardboard, paper yarn, toilet paper and other paper, suitable for low, medium and high speed different machine. Great sales, inventory is abundant, a lot of cash to ensure timely delivery. Companies with diverse and high-quality paper Retention products and professional retention and drainage techniques known in the industry outside: a variety of imported brands original supply, quality assurance. Products, including solid and liquid, complete model specifications for different customers in different machine processes, choose the most suitable products, reduce costs and improve production efficiency. Sales technical staff after the company co-leading supplier of international companies specialized training, and have many years of experience in the machine on-site machine. The company can send technical personnel door leading to provide PAPERMAKING application site technical services, the paper analyzes and related causes streaky look, retention agents reasonable amount of formulation design, retention and drainage systems to optimize use of the program designed to provide long-term technical support and guidance. Provide customers with products experimental sample form, free of charge to customers on lab samples. Several sets of professional retention programs and technologies: dual-polymer dual paper retention and drainage systems; ultrafine dual paper retention and drainage programs; Bentonite particles dual papermaking retention and drainage system; three yuan double PAPERMAKING help filter technology; the new tri particulate papermaking retention and drainage technology.