Study and optimization of pulp paper composition to produce packaging paper

The paper deals with the study of paper pulp composition influence on properties of paper based on waste paper raw materials. Application of the method of mathematical planning and solution of optimization tasks helped to establish the optimum contents of a sizing agent and cationic starch in the paper pulp composition, comprising 0.109 и0.5% of a. d. f. respectively. It is shown that the degree of paper pulp beating should be 45°ShR in order to achieve the required values of breaking length 3700 m, tensile energy absorption 34.2 J/m?, bulk 2.39 sm?/g and elongation 1.6 mm

Influence of conditions for obtaining styrene copolymers on paper properties

The influence of the conditions for obtaining reinforcing additives based on copolymers of styrene and maleic anhydride on change of the physical and mechanical properties of paper is established. The obtained products are completely soluble in water and have an anionic character. Greater anion character has partially saponified sample. The results of thermogravimetric analysis showed that the greater resistance to thermo-chemical degradation has a saponified sample. In this case, activation energy is 177.2 kJ/mol

Application of the modified styrene copolymers for reinforcement of recycled pulp paper

The article is devoted to investigation of reinforcement effeiciency of the agents received on the basis of styrene copolymers and maleic anhydride on the properties of paper made of recycled pulp. It was established that for modification of styrene copolymers it is resonable to use NH4OH. Preferred content of maleic anhydride is 20?22 mol. %. The molecular weight of maleic anhydride copolymers should be in the range of 5,500?6,500 c. u. The reinforcement of styrene copolymers is manifested when the content of them in fibrous slurry is 0.5% of the mass of a. d. s. Drying temperature (120±2?C) increases this effect, the strength of paper samples testifies it

Элемент согласования волноводной линии передачи с диодом

The article deals with the issues of matching a waveguide transmission line with millimeter wave diodes. The implementation of the transition of a rectangular waveguide to a microstrip switching line in the form of a line of the fin-line type is described. The computer simulation results of the transmission coefficient module of the developed element and the standing wave coefficient by voltage separately for the transition from a rectangular waveguide to a microstrip transmission line and as part of an amplitude detector are shown. A joint application of the developed element with a microstrip detector based on a Schottky diode in the frequency range from 118.1 to 178.4 GHz is proposed. The results of measuring its parameters and the results of determining the sensitivity are given, as well as the evaluation of the results obtained is performed. The obtained results proved the possibility of using the matching element of a waveguide transmission line with a diode in the millimeter wavelength range. Рассмотрены вопросы согласования волноводной линии передачи с диодами миллиметрового диапазона длин волн. Описана реализация перехода с прямоугольного волновода на микрополосковую линию передачи в виде линии типа фин-лайн. Показаны результаты компьютерного моделирования модуля коэффициента передачи разработанного элемента и коэффициента стоячей волны по напряжению отдельно перехода с прямоугольного волновода на микрополосковую линию передачи и в составе амплитудного детектора. Представлена реализация совместного применения разработанного элемента с микрополосковым детектором на базе диода Шоттки в диапазоне частот от 118,1 до 178,4 ГГц. Приведены результаты измерения его параметров и определения чувствительности. При оценке полученных данных подтверждена возможность применения разработанного элемента согласования волноводной линии передачи с диодом в миллиметровом диапазоне длин волн

Study and optimization of pulp paper composition to produce packaging paper

The paper deals with the study of paper pulp composition influence on properties of paper based on waste paper raw materials. Application of the method of mathematical planning and solution of optimization tasks helped to establish the optimum contents of a sizing agent and cationic starch in the paper pulp composition, comprising 0.109 и0.5% of a. d. f. respectively. It is shown that the degree of paper pulp beating should be 45°ShR in order to achieve the required values of breaking length 3700 m, tensile energy absorption 34.2 J/m?, bulk 2.39 sm?/g and elongation 1.6 mm

Influence of conditions for obtaining styrene copolymers on paper properties

The influence of the conditions for obtaining reinforcing additives based on copolymers of styrene and maleic anhydride on change of the physical and mechanical properties of paper is established. The obtained products are completely soluble in water and have an anionic character. Greater anion character has partially saponified sample. The results of thermogravimetric analysis showed that the greater resistance to thermo-chemical degradation has a saponified sample. In this case, activation energy is 177.2 kJ/mol

Application of the modified styrene copolymers for reinforcement of recycled pulp paper

The article is devoted to investigation of reinforcement effeiciency of the agents received on the basis of styrene copolymers and maleic anhydride on the properties of paper made of recycled pulp. It was established that for modification of styrene copolymers it is resonable to use NH4OH. Preferred content of maleic anhydride is 20?22 mol. %. The molecular weight of maleic anhydride copolymers should be in the range of 5,500?6,500 c. u. The reinforcement of styrene copolymers is manifested when the content of them in fibrous slurry is 0.5% of the mass of a. d. s. Drying temperature (120±2?C) increases this effect, the strength of paper samples testifies it