A method of manufacturing a decorative paper on the paper machine.

 

(57) Abstract:

Usage: paper making, mainly the cover, forzani and other kinds of decorative paper on the paper machine. The inventive method includes the formation, the surface treatment liquid, pressing with the application of the relief in the process of pressing through the shaft with profiled surface with dry cloth 32 to 40%, and subsequent drying. The application of the relief takes place simultaneously with the surface treatment of the fabric with liquid, previously applied to the surface of the shaft. Use the shaft with a minimum width of the hollows of its profiled surface is 0.08 - 0.20 mm and rounded edges. 2 Il., table 1.

The invention relates to a method of production of paper and can be used mainly in the manufacture of the cover, forzani and some other kinds of decorative paper on the paper machine.

A known method of manufacturing a decorative paper, mainly the cover and forzani, including sheet formation, pressing his application of relief in the process of pressing by using a shaft with a profiled surface with shocirovany surface is disturbed the homogeneity of the structure of the paper web, especially in places of influence of the edges of the surface profile of the shaft. This reduces the strength of the paper surface to abrasion and plucking, which is a significant disadvantage for printed papers.

As the closest analogue of the accept method of manufacturing a decorative paper, mainly the cover and forzani, including the formation, the surface treatment liquid, extrusion, drawing of elevation in the process of pressing through the shaft with profiled surface with dry cloth 32-40% and subsequent drying [2]

In the mentioned method, the surface is treated at the stage of molding a mixture of a polymeric binder with a water-soluble salt of aluminum, and the relief with the help of the shaft is applied after the above processing liquid.

Compared with similar [1] resistance to surface abrasion is increased due to the introduction of the binder.

However, when implementing this method, a part of the binder is lost because it has not yet completed the process of dewatering the paper web. When this bonding occurs across the thickness of the fabric, and bonding the surface layer is insufficient. This leads in this way to nedostate the faceted surface of the shaft will be clogging fiber troughs or with a small width of the depressions of the mechanical destruction of the fiber, his cut on the sharp edges of the profile of the shaft. As a result, reduced the quality of the paper web.

The aim of the invention is to improve the quality of the paper.

This goal is achieved by the fact that in the method, including the formation, the surface treatment liquid, pressing through the shaft with profiled surface with dry cloth 32-40% and subsequent drying, according to the invention the application of the relief takes place simultaneously with the surface treatment of the fabric with liquid, previously applied to the surface of the shaft, using a profiled shaft minimum width of the depressions, is 0.08-0.20 mm and having the roundness of the elements of the profiled surface.

In Fig.1 shows a device that implements the proposed method, Fig. 2 the profile of the surface relief of the shaft.

The device comprises a shaft 1 with a profiled surface, the upper shaft 2 with smooth surface and 3 bath with processing liquid. The radius of the fillets is marked with the letter r, and l the width of the depressions. The shaft 1 is installed at the end of the press section.

The method consists in the following operations.

Molded cloth when dry 32-40% is fed into the gap of midni shaft 1 on its surface a layer of processing liquid, when the contact is carried on the surface of the paper web.

Due to surface tension and the presence of the depressions of the fluid layer has a greater thickness on the surface of the depressions. Upon contact with the paper web under the influence of the grooves paper is pressed into the cavity and exposed to intensive exposure to liquid. This provides a higher degree of processing of the formed protrusions on the surface of the paper. Increased processing of protrusions on the surface of paper is important, because the protrusions are in contact with elements of the printing form when applying paint to the surface of the finished paper, and subjected to the highest loads when using the printed products during processing.

Rounding profile prevents the destruction of the fibers. In addition, for each type of paper define the minimum width of the depressions. Impact obrabatyvajushhee fluid creates an enabling technology for concurrent processing of application of the relief on the surface of the paper.

P R I m e R 1. A method of manufacturing a decorative forzani paper weighing 120 g/m2as follows. Paper weight, you need a kitchen and a 32% the application of the relief takes place simultaneously with the surface treatment of the lower side of the paper web mix containing starch and aluminum sulfate at a ratio of 1:1, previously applied to the profiled surface of the shaft. Using a profiled shaft with a minimum width of depressions equal to 0.1 mm, and the radius of the fillets elements shaped surface is 0.05 mm, the Paper web with the received relief passed through the drying part of the machine, through a lightweight machine calender and directed to forward. The weight of the coating was 3 g/m2. Received forzano paper is tested by standard methods.

P R I m m e R 2, and 3. The method is carried out analogously to example 1. The width of the depressions shaped surface of the shaft, respectively 0.08 and 0.20 mm

P R I m e R s 4 and 5 (control). The method is carried out analogously to example 1. The width of the depressions shaped surface of the shaft, respectively, of 0.07 and 0,021 mm

P R I m e R 6 (prototype). A method of manufacturing a decorative forzani paper weighing 120 g/m2as follows. Pulp prepared according to the standard technology for manufacturing forzani paper, putting on the grid for the sheet formation at the stage of forming the upper side of the sheet at a humidity of 96% operatiu sprayers for surface treatment of wet cloth on the grid paper machine at a relative humidity of fabric 96% Relief is obtained by passing the fabric between the two shafts, established in positions offset press, the upper shaft which has a profiled surface with trapezoidal pepper-section, with the angle profile 40about. The paper web with the received relief passed through the drying part of the machine, lightweight machine Kalat and reel. The weight of the coating is 3 g/m2. Received forzano paper have standard methods.

The test results for examples 1-6 are presented in the table.

The table shows that the best results are obtained in examples 1-3, and best correspond to the mean width of the hollow profiled surface and the shaft. In examples 4 and 5 marked decrease in performance, including the most important figures in columns 2 and 3 the stability of relief, abrasion resistance and associated resistance to picking. However, the performance of all of the examples 1-5 above figures, obtained by the method prototype.

A significant decrease in the width of the depressions shaped surface of the shaft will result in increased mechanical damage to the fibers, and increases the width of the blocking troughs fiber and reduce the stability of relief and abrasion resistance.

Isola paper machine.

A method of MANUFACTURING a DECORATIVE PAPER ON the PAPER MACHINE , mainly the cover and forzani paper, including the formation, the surface treatment liquid, pressing with the application of the relief in the process of pressing through the shaft with a profiled surface with projections and depressions, for dry cloths 32 - 40% and subsequent drying, characterized in that, to improve the quality of the paper, the application of the relief takes place simultaneously with the surface treatment of the fabric with liquid, previously applied to the surface of the shaft, use a shaft with a minimum width of the hollows of its profiled surface is 0.08 - 0.20 mm and rounded edges.

 

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SUBSTANCE: device comprises frame, drive, drum, cutting mechanism with movable blade, fixing mechanism for initial blade position fixation relative drum and accumulation means. Device is provided with blocking mechanism, which secures position of movable blade drive shaft, discrete angular drive of movable blade and changes corrugated cardboard blank lengths. The blocking device is made as screw pair. Screw pair nut is pivotally connected to the frame, screw thereof is pivotally linked with double-armed lever having pivot pin aligned with axis of drum rotation. The second arm of the lever is kinematically linked with T-shaped connecting-rod of cutting mechanism drive by control-rod. One end of connecting-rod is connected to crankshaft on drum pivot, another end thereof is mounted on control-rod attached to swinging unit of three-armed lever of discrete angular drive mechanism of movable blade arranged to perform angular swinging about pivot of mutually connected brake drum and drive pinion. Drive pinion is brought into engagement with driven pinion on cutting mechanism drive shaft end. Pair of mutually spring-loaded brake blocks is installed in brake drum kinematically connected through control-rods with ends of oppositely directed arms of three-armed lever. Blocking mechanism for cutting mechanism drive shaft blockage is mounted on another end of above shaft. The blocking mechanism is made as brake drum installed on frame. Pair of mutually spring-loaded brake blocks is arranged into the drum and kinematically linked with double-armed lever by control-rods. The double-armed lever is coaxial with geometrical axis of cutting mechanism drive shaft including lever of mechanism for fixing movable blade in its initial position. The lever is linked with double-armed lever by control-rod. Free end of double-armed rod has roller periodically cooperating with frame rest. Pivot of double-armed lever of fixing mechanism is arranged on bracket of hollow blade holder shaft. Blade holder is installed on hollow shaft with the use of threaded pins. Blade is removably installed in blade holder groove. The blade is made as conventional replaceable bar for cross-cutting corrugated cardboard. Hollow blade holder shaft is coaxially arranged on cutting mechanism drive and may perform limited rotation. Hollow blade holder shaft is connected with cutting mechanism by a plurality of resilient members.

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1 dwg

FIELD: mechanisms and processes for cutting corrugated cardboard.

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EFFECT: increased whitening extent, capillarity and moisture absorbing capacity of wool produced.

2 tbl, 5 ex

FIELD: paper and cardboard production in pulp-and-paper industry.

SUBSTANCE: method involves preparing cellulose suspension; flocculating and draining suspension on net for producing of paper web; drying paper web. Flocculation process is initially performed with the use of cation-active material, such as natural or synthetic polymer, followed by flocculation with the use of flocculant system including silicon-containing material and organic microparticles having diameter less than 750 nm in unswelled state.

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28 cl, 3 dwg, 12 tbl, 3 ex

FIELD: paper-and-pulp industry.

SUBSTANCE: calcium carbonate product is designed for containing paper and comprises mixture of first and second separate calcium carbonate particles, wherein difference between first and second calcium carbonate particles ranges from about 0.1 μm to 0.2 μm and weight ratio of first to second particles lies between about 50:50 and about 80:20. Pigment is intended for coating paper and made from above-defined product. Method concerns containing paper and comprises preparation of mixed pigment based on calcium carbonate precipitated in the form of aragonite having above-indicated makeup; addition of binder; and deposition of the pigment onto a base paper in the form of binder-containing suspension. Paper is then dried and calendared. Also described are: paper obtained by above method; a method to increase gloss of paper sheet involving operation of including above product into base paper coating suspension; a method to increase gloss of paper involving operation including calcium carbonate product wherein first calcium carbonate particles have average size about 0.4 μm and the second ones about 0.5 μm at their weight ratio 60:40, respectively; a method to increase gloss of paper sheet involving operation of including pigment based on argonite-type calcium carbonate with difference between first and second average particle size values from about 0.1 μm to 0.2 μm and their weight ratio between about 50:50 and about 80:20 into base paper coating suspension.

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24 cl, 3 tbl

FIELD: pulp-and-paper industry, in particular paper or board production.

SUBSTANCE: claimed method includes providing of slurry containing cellulose fiber and at least sizing agent interacting with cellulose. Sizing agent is selected from group containing ketene dimmers and acid anhydrides. Cationic vinyl polymer obtained by additional polymerization, containing aromatic units and anionic vinyl polymer obtained by additional polymerization and having molecular mass from 6000-100000 are introduced into slurry. Then obtained slurry is dehydrated and paper leaf is formed.

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11 cl, 3 tbl, 2 ex

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16 cl, 1 tbl, 20 ex

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