SU690104A1 - Method of obtaining pulp reduced to fibres - Google Patents

Description

I Isophagous refers to the center of paper-tightness regarding the method of obtaining fluffy peelkhuya, intended to produce sanitary and hygiene products of household products, papers obtained by the dry method. A known method for producing fluff pulp is that the initial pulp is pre-ground into pieces of pautome i-5 cm, and the bar is divided into fibers in disk fragments. The pulverized pulp obtained using the transport and transport system for sanitary and hygiene of household and domestic products ..: Also known is a method for producing fluff pulp containing lamination of the starting material to the moisture content of the subsequent separation into fibers in a disk refiner under stationary into the gap between the discs, with the speed of the air flow. Zb-40 m / s. z. .,. .. - .. -.-. - 2: The main disadvantage of these methods is the low quality of the cultivated cellulose due to its large number of nodules (up to 1–15%) and a shortened shortening during grinding. This leads to a decrease in the enormous capacity of fluffed cellulose, consequently, to increase in the consumption of cellulose, in the sanitary and gingous plants and household appliances. The purpose of this h) invented is to improve the quality of the races by the ear pinch. This method is achieved that the pre-moistening of the raw material of the cellulose material leads to a moisture content of 15-75%, and the separation of the fiber is led into the interacting jets of compressed gas at skimmer. outflow; jets 15O-110O m / s. ;. The essence of cncicpea is as follows. The raw cellulosic material in the form of rolls or a knife from the sheets is evenly fed to the wetting, which is carried out to a moisture content of 15-75%, and then sent to a device for pre-crushing the flake. Uvallein flakes of the shplano material are divided into fibers by introducing their interacting jets of compressed gas. The flow rate of the jets is 150-1100 m / s and is determined based on the type of pulp and its moisture. At the same time, the production of flakes into fibers is their drying. The finished Qert iMrit product is sent through the pneumatic conveying system for use, and the non-shredded material is returned to high-speed jets for further testing ... Dryness of the fluff pulp produced by this method, depending on its requirements, is within 65-95%. Example. The shnny method is used in the preparation of fluff pulp intended for the manufacture of sanitary and hygiene and household products. Fractional with Cellulose Fraction Number

Fluffed by the proposed method 91,4 4,4 1,1 3,1

91.3 4.6 2.6 2.9 86.1 6.2 0.8 6.9

The data given in table. , show that sulfite bleaching is not cellulose fluffed on. This method does not contain nodules and has a greater absorption capacity than similar pulp, fluff by a known method. The pulp fluffed by this method does not differ in its fractional composition from the original sheet pulp, which confirms the absence of shortening of the fibers in the process of pulping.

2.57

not

five

19.64

Increasing the absorptive capacity of cellulose fluffed by this method as compared to cellulose fluffed according to the limestone method, reduces its content in sanitary-hygienic and household products.

PRI me R 2.

The experiment was carried out with a sheet of air-dried sulfite unbleached pulp. The conditions of the experiment and the method of analysis of the quality of fluff. The experiment was carried out with coniferous sulfite bleached pulp. Sheet air-dried pulp is moistened to dryness of 60% and then crushed into flakes with a maximum particle size of 5 mm. Then the cellulose flakes are served for different. dividing them into individual fibers while simultaneously drying into a mill with the opposite streams and a separator for continuous separation of the finished product. The discharge velocity of the compressed gas jets from the nozzles is 450 m / s. Dry fluff pulp composes 85%. It is known that the main requirements that are imposed on fluff pulp for the manufacture of sanitary-hygienic and household products are: high absorption capacity, minimum nodule content, as well as minimum fiber alignment. The quality indicators of fluff pulp obtained by this method are favored. with similar indicators of fluff pulp obtained by a known method from the original pulp sheet. Indicators of the quality of bleached pulp sulphite are given in c. tab. 1. Table Contents: Absorbing nodule ability,%, in grams per gram of fluff pulp

pulp is the same as in example 1. The flow rate of the jets of compressed gas and nozzles is 200 m / s. In view of the fact that sulphite unbleached celloposis is not used for the manufacture of sanitary-hygienic and household products,. The quality of sulfite unbleached fractional pulp cellulose fraction number

The cellulose pulp obtained by this method is compared with similar indicators of bleached sulphite pulp shown in Ta.bl.1, and with the figures of the original sulphite non-whitewood sheet. Qualitative indicators of cellulose are given in table. 2,

TABLE 2 Contents Capacity of nodules is absorbed,% in g of water per gram of fluffed cellulose

Fluffed by this method93.9 4.0 O, 5 1.6 no

The original sulfite.

unbleached leaf 94, O 3.9 O, 6 1.5

PRI me R 3.25

The experiment was carried out with a sheet of air-dried sulphate unbleached cel- u. vine.

The conditions of the experiment and the methods for analyzing the quality of fluff pulp are the same as in Example 1. The flow rate of C5 gas jets is 85 O m / s. J5 Fractional with Cellulose Fraction number Fluffed by this method 93.4 4.5 1.2 0 0 Initial sulphate unbleached sheet 93.2 4.6 1.6 1.21.0 The data given in table. 2 and 3 show that unbleached cellulose fluffed by this method has a greater absorptive capacity than bleached pulp. According to the fraction of the composition, non-bleached cellulose fluffed according to this sp23, 62

Due to the fact that sulphate unbleached cellulose. For the manufacture of sanitary-hygienic and household products is not used, the quality indicators of sulphate unbleached fluff pulp,

30 obtained by this method, equalized with bleached pulp sulphite indicators, attached to the table. 1 with indications of starting unbleached sulphate pulp. Quality indicators of cellulose are given in table 3. TABLE 3 Contents Absorbs the ability of nodules,% in g of water per g of fluffed cellulose not 23,36, itself, does not differ from the original sheet (jelly pulp, which confirms the absence of fiber shortening in the pulp fluffing process. Use of unbleached pulp, with more absorbing ability, weymen of bleached pulp, pos. 69010.Losening the cost of sanitary and hygiene to household products as a result of its lesser cost for HfoHHOBfieMeHHoro to reduce the amount of content in the area, as a trace The method that is used is able to saw the quality of the saw, i.e., with increased ability, without shortening the VO fibers to not containing nodules. Applying the process of cellulose separation into separate sections, interacting jets of compressed gas instead of a mechanical engine, the goal is 5 yupozy in a disk refiner, and it also reduces the risk of fire and explosion and the possibility of the formation of static electricity. . In addition, the improvement in the quality of fluff pulp obtained by this method, according to the comparison of the equilibrium weight of oct) 6oM, gives (“an opportunity to reduce the amount of oil in finished products 4.. 8. by 15-25%. And also use more cheap types of semifinished products, for example, unbleached chaining: f o rmul a and a p re a Method of falling out of a fluffy hatchet of a vine by prewetting the raw material of the original material, grinding it followed by separating it in a stream of reproduction, l and h ay and with the fact that, for the purpose of quality of the target product, a preliminary amount of lead is up to lS-75%, and dilution is carried out in interacting compressed gas at a flow rate of jets of pO m / s. Istochrnichy ivformatsin accepted at examination 1. US Patent No. 3596840, cl 241-28, 197О. 2. US Patent No. 3475791, CL 119-156.3, 19v9.