Alkyl ketene dimer (AKD) is most common neutral/ alkaline sizing agent. It is an Internal sizing agents. Structurally, it is unsaturated lactones and it is synthesized from fatty acids. Physically it is waxy like milky emulsion chemicals. It has less corrosive to the papermaking machine than acid sizing. For cultural paper and packing paper.
CM Chemical has developed the following products.
Advantage
Alkaline sizing system reduces corrosion of paper machine equipment.
Less foam produced by the approach system than the acidic rosin system.
AKD pulp sizing cost less than rosin sizing.
Hard- sizing can be applied, and the stocking sizing degree is proportional AKD usage.
Features
Mature production process, easy application, simple adding equipment.
High self-retention, good sizing effect, fast curing rate.
Strong anti-interference and good stability.
Good anti-moisture effect for the paper, can effectively prevent the reduction of RCT.
AKD wax introduction Chemical name: Alkyl Ketene Dimer Alias: AKD wax AKD powder is also called AKD wax. Chemical name is Alkyl ketene dimer. CAS registration number is 144245-85-2. Appearance is pale yellow flake or granular solid. It is produced by fatty acid (C16), via acylation and dehydrochlorination to become AKD wax. AKD wax is mainly used for papermaking neutral sizing agent. R or R' in the above structural formula is the alkyl group, and a series of alkyl ketene dimers can be obtained through modifying different alkyl groups. Octodecane and cetane are applicable to the papermaking neutral sizing agent. Alkyl ketene dimer is a white-to-yellow solid with the melting point of about 47 ~ 51 , which can be soluble in ethyl alcohol, benzene, chloroform and other organic solvents. The reactive group of alkyl ketene dimer-ketone group has high activity and makes esterification reaction with the hydroxyl in cellulose. Product Application AKD wax can be made into AKD emulsion applied as in sizing agent in the papermaking production. AKD wax is emulsified by the cationic emulsifier, and melted AKD wax and emulsifier undergo high-speed shearing and high pressure homogenization to form the liquid AKD sizing agent after cooled. In the papermaking process, application of AKD sizing agent gives the fluid resistance to paper and paperboard to prevent or delay the penetration and diffusion of some liquids on paper fibers, thus satisfying people's requirements on the processing and use of paper products. AKD contains hydrophobic group and hydrophilic group, which are well distributed in the sizing process to transfer to locate the process of bonding with cellulose. AKD emulsion particles stay between negatively charged paper fibers since they carry with positive charge by virtue of cationic starch and PAM and other retention agents; In the pressing and drying process of the paper machine, these globular AKD particles are easily expanded and distributed on the surface of fibers due to the lower melting point to form a homogeneous cover film; When paper is dried and stored for a period, the active group (lactone ring) on AKD molecule makes the esterification reaction with the hydroxyl on fibers under certain conditions to be binding on fibers in the form of fixed covalent bonds. Hydrophobic long-chain alkyls transfer to the paper surface in order to give the penetration resistance to paper.
AKD wax(Alkyl ketene dimer) for akd emulsion used as paper internal sizing agent AKD wax, alkyl ketene dimer wax, can be divided into 3 models: AKD 1840, AKD 1865 and AKD 1895, is mainly used for internal sizing of various paper, such as copper plate base paper, copy paper, archival paper, high quality writing paper and corrugated paper. AKD wax is usually used together with AKD emulsifier, AKD dispersant, AKD stabilizer to make AKD emulsion. AMAZON provide technical support for new customers in AKD emulsion production process. HS CODE: 39049014 Product Name AKD 1840 AKD 1865 AKD 1895 Appearance Slight yellow bead Slight yellow bead Slight yellow bead AKD content (%) 90% 90% 90% Acid value (mgKOH/g) 5 5 5 Melting point (°C) 47 50 60 Iodine value (g12/100g) 45 44 43
Supplier: Alkyl ketene dimer (akd wax) akd emulsion, emulsifier
Buyer: Stearic acid
With the product name "SOFTOMNI 2000" is a proprietary formulated alkaline sizing agent. ALKYL KETENE DIMER (AKD) emulsion, designed to size the paper in the neutral to alkaline ph range of 6.5 to 8.5 SOFTOMNI is a free flowing white emulsion stable to size any type of furnishes preferably containing calcium carbonate. Different type of furnishes require different application method and dosages. SOFTOMNI 2000 is added as such (can be diluted with water to the maximum extent of 1:3 ratio) in the thick stock by diaphragm type of dosing pump. Addition of SOFTOMNI 2000 before filler is preferable to get best sizing effect. The efficiency of ALKYL KETENE DIMER depends on the retention and drainage aid program. The higher the drainage, first pass retention and first pass ash retention, optimum is the efficiency of AKD. A cationic scavenger in necessary where there is high levels of anionic trash in the furnish like deinked pulp.
Akd wax is pale yellow waxy flake solid which is widely used in the paper industry as sizing agent. Our akd wax is a neutral sizing agent which can directly react to fiber with high content and i2, assay and low acid, and is more efficient sizing agent without organic impregnant lik benzene and so on. After sizing with akd emulsion, it can make paper less water absorbing and controls its printing properties. 25kg/bag, 640 bags/20fcl
AKD wax(Alkyl Ketene Dimer, Simplified: AKD) is a neutral sizing agent, which can directly react with fiber. AKD wax produced by Shandong Tiancheng Chemical Co., Ltd, With high content and low acid value, is more efficient a sizing agent. AKD WAX Advantage 1. Higher purity 2. Lower acid value PRODUCT DESCRIPTION AKD WAX Specification Assay %: 90 min Iodine Number gI2/100g: 45 min Acid Value cPs/25â??: 5.0 max Melting Point: 47 min Appearance: Pale yellow granule Packaging: 25kg/bag Shelf life: 6 months
Supplier: Modified tapioca starch and native tapioca starch from Thailand
and also provides chemicals used in pulp & paper mills such as akd (alkyl ketene dimer) pulp sizing agent, surface sizing agent, dry strength agent, wet strength agent, cationic rosin size, defoamer,
Services: Manufacturer and exporter
Cas no.: 144245-85-2 Appearance : pale yellow waxy flake solid Packaging : 25kg/50kg per woven bag with pe-liner Minimum order : 5 tons Shipping port : qingdao or tianjin Product's description Description: It is pale yellow waxy flaky solid, it is widely used in the paper industry as sizing agent. Package: 25kg/50kg per woven bag with pe-liner or as your requests. Storage: Away from insolation and rain, place it in dry and good ventilation condition, storage temperature is from 5¡ãc to35¡ãc. Application£º It is used for paper making. After sizing with akd emulsion, it can make paper less water absorbing and controls its printing properties.
Defoamer is a special polyether compound defoamer for papermaking. It has de-foaming and antifoaming properties with strong surfactant action and long duration. It can control the whitewater system foam of newsprint, cultural paper and wrapping paper machine, improve the dewatering ability, and control the foam of the sizing system without affecting the sizing performance. This product is free of mineral hydrocarbons and is an eco-friendly product. Advantage: Defoamer has strong de-foaming, anti foaming and degassing capabilities and lasts for a long time. Defoamer has good compatibility and does not conflict with other chemicals in the papermaking system. Can effectively improve dehydration, reduce pinholes and bubbles on paper, reduce the frequency of paper breaks, and improve production efficiency. Can improve the retention rate and reduce the load on the pump, pressure screen. Features: Defoamer product is a low viscosity and a facility to spread rapidly on foamy surfaces. It has affinity to the air-liquid surface where it destabilizes the foam lamellas. This causes rupture of the air bubbles and breakdown of surface foam. Entrapped air bubbles are agglomerated, and the larger bubbles rise to the surface of the bulk liquid more quickly.
