â… Product Composition: polydadmac
â…¡ Product Properties
The appearance of this product is colorless to pale yellow viscous liquid. It is soluble in water. It has goodhydrolyticstability and high adaptability to PH value changes. It`s safe and non-toxic. Its freezing point is about -2.8℃, specific gravity is about 1.04/cm3 and decomposition temperature is 280-300℃. It`s polymeride AKD maturing agent of high charge density. Emulsion provides strong cationic component promotive and protective agent and promotes curing effect. This product is added directly into the synthesis process of intermediates or added a certain ratio in emulsion. This product can be added more in the papermaking system with heavier anionic trash, as the pulp potential equilibrium to play a dual role of sizing enhancement and forcing ripening.
III. Quality indicators;
Appearance: colorless to faint yellow thick liquid Solid content: 40±1%
PH value: 4.0~7.0 viscosity (mpa.s, 25℃): 7000-12000
IV. Application:
This product is applied in alkaline sizing system of AKD (Alkyl Ketene Dimer) to restrict largely the hydrolysis and migration aptitude of AKD. [The third generation" AKD is mainly used for the making of multipurpose duplicating paper filled by precipitated calcium carbonate. 60% cationic polymer can adhere to the fiber after the paper containing cationic polymer being reused, by which enhance hydrophobicity of the paper. Added to waste paper deinking agent, its cationic hydrophilic group adheres to ink particles easily, especially for hydrophobic aniline ink. After flotation, the whiteness of pulp increased. This product is also applied as cationic surfactant in pitch control agent for pulping.
Curing Agent,Poly Dadmac,Paper Curing Agent,Adhesive Curing Agent Shandong Tiancheng Chemical Co., Ltd. , https://www.tianchengchemical.com
Storage technology of seed corn
Improper storage of seed corn will cause the germination rate of corn seeds to decline, which will cause great losses to the farmers who produce the seeds, the corn seed acquisition companies and the farmers who use them. In order to reduce this loss, Zhang Xiaomei, a researcher of the Shanxi Academy of Agricultural Sciences, explained the storage technology of seed corn for everyone. The easy-to-appear conditions of corn seed storage: 1. Easy-to-heat corn is a large-grained, large-embryo seed that is prone to heat and causes deterioration of the seed. 2, easily rancid high temperature, high humidity easy to make corn embryos produce free fatty acids, so that the acidity increased, will affect the viability of the seed. 3, easy to mold corn seed thin, easy to mold, causing seed deterioration. 4. It is vulnerable to freezing frost and the seed has a high water content and is subject to freezing damage, which affects the quality of the seed. In view of the above conditions, to store corn well, we must do the following: 1. Decrease the moisture content of the corn seed to 12.5%, store for 0.5 to 1.5 years, increase the viability of the seeds by more than 99%, and germination percentage by 97% to 98%. The most effective measure to reduce seed moisture is ventilation. Ventilation can be divided into two types: 1. Natural ventilation According to the inside and outside temperature and humidity, reasonable opening and closing doors and windows, using air convection ventilation, the effect depends on the internal and external temperature difference, wind speed, stacking method, stacking size, seed porosity and many more. When the outside temperature and outside humidity are lower than the inside of the bin, the wind speed is large, the stacking is small, and the ventilation effect is good when the porosity is large, otherwise the effect is poor. Natural ventilation requires air to circulate as long as there is a temperature difference and wind speed. For this reason, reasonable ventilation time must be selected. Measure the temperature and relative humidity inside and outside the warehouse before ventilating. When the temperature and humidity outside the warehouse are lower than that in the warehouse, ventilation is allowed; the temperature and humidity outside the warehouse are the same as those in the warehouse, and the other is lower than the warehouse. Can be ventilated; outside the temperature is lower than the warehouse, and the relative humidity is slightly higher than the warehouse, through the air into the warehouse after the relative humidity is significantly lower than the original warehouse humidity, ventilation. 2. Mechanical ventilation Blow dry cold outside air into the seed heap or suck out the hot and humid air inside the seed heap. Mechanical ventilation, a type of press-in (blowing), connecting the air outlet of the fan to the air duct, so that the external cold air is pressed into the seed pile, and the hot and humid air in the seed pile is distributed by the seed surface; the other is the suction type, Connect the vent of the fan to the air duct, and suck the hot and humid air in the seed heap out of the air duct to reach a suitable temperature and humidity. Second, there are two kinds of clever storage methods: First, the ear method, the taro ear storage, which is conducive to seed ripening and drying, reduce the risk of worms and microorganisms, but the storage capacity utilization is low. The second is the grain-collection method, which requires stricter requirements for seeds. And the pellets are prone to insects and mildew. The general relative humidity is less than 80%, and it is better to use the ear to hide. It is suitable for small-scale storage in the farmhouse. The relative humidity is more than 80%, and the grain is better. When the grain is hidden, it can be sealed with a low-temperature lid to keep the seeds at a low temperature and reduce the damage of insects and molds.
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