A method of improving hydrophilicity of the base paper wrappers for food products

 

(57) Abstract:

The invention concerns a method of improving hydrophilicity of the base paper wrappers for food products, in particular for the shell of sausages and other the invention consists in the processing of paper-the basics of low temperature plasma of high-frequency glow discharge in oxygen atmosphere for 5 to 360 C at a pressure of 10 to 300 PA and the power density of the discharge 0.003 to 3.0 W/cm3. 6 table.

The invention relates to methods for increasing the hydrophilic properties of the base paper wrappers for food products (sausages and other) and can be used in the pulp and paper and other industries, processing these kinds of base paper.

The aim of the invention is that the base paper, consisting of bast, cotton and/or viscose fibers, processed by low-temperature plasma of high-frequency glow discharge in oxygen atmosphere for the first time.

The invention consists in that in the method of improving hydrophilicity of the base paper wrappers for food products containing bast pulp and cotton fibers, viscose fibers and resin, made from canvas securities is in the environment of oxygen within 5-360 C at a pressure of 10-300 PA and the power density of the discharge 0.003 to 3.0 W/cm3.

To implement the method using low-temperature plasma of high-frequency glow discharge induced under reduced pressure. The peculiarity of such a plasma is its irregularity and nonisothermal, manifested in a significant excess electron temperature (Te30000 K) above the gas temperature (Tg375). In this environment the activation action in the discharge have inelastic electrons struck.

Active ingredients O (3R), O2( 1g), O3formed in the oxygen atmosphere, characterized by significant lifetimes and high reactivity at low temperatures.

When the interaction of active components with the surface of the processed sample processes are modified, leading to hydrophilization samples. Feature processing in a plasma is the absence of thermal effects on the treated materials. The concentration of active ingredients can reach 10%

Processing of low-temperature plasma implement the installation of a high-frequency glow discharge, which represents an instantaneous vacuum system, continuously pumped through mechanicality valve and valve. As a plasma-forming gas using oxygen supplied in the preliminary tank through the valve and special safety valve from a standard oxygen cylinder. Measuring the pressure in the discharge system is carried out using thermobarometry and thermocouple bulb built into the system.

Excitation of high-frequency glow discharge in the area between the outer electrodes is carried out with the help of a generator of high frequency oscillations, the anode voltage is set to a special power source and controlled by a voltmeter. Bit system the experimental setup is equipped with a removable flange, allowing you to set the processed samples directly into the discharge area.

P R I m e R 1. Bleached flax pulp grind in a laboratory roll to the degree of grinding of the 25aboutSHR and it made samples of the paper base.

Samples of the paper is exposed to nizkotemperaturnoi plasma. The sequence of operations in the processing of base paper:

1. Sample paper base with a diameter of 200 mm is installed in the middle zone electric discharge chamber with an external electric electrodes.

2. Include vacuum nazivaut set pressure within 10-300 PA.

4. Include high-frequency generator at a given power density of the discharge in the range of 0.003 to 3.0 W/cm3.

5. Processing is carried out for a certain length within 5-360 C.

6. Turn off the pump and a high-frequency generator, is fed into the chamber, atmospheric air is extracted from the cell sample and conduct the tests.

Treated and untreated samples of base paper analyzed to determine changes of the mechanical strength and absorbency in the process of plasma chemical treatment according to standard techniques.

Samples of base paper from bleached flax pulp according to example 1 is treated with low temperature plasma at specific discharge power of 0.1 W/cm3in 15 seconds at a pressure in the discharge chamber 5, 10, 150, 300 and 320 PA, respectively, for the paper samples 1, 2, 3, 4, and 5.

Indicators of the quality of the base paper on the proposed method in comparison with the prototype, and the analogue is presented in table.1.

From the data table. 1 shows that the optimal pressure in the discharge chamber when exposed to low-temperature plasma on the base paper is a pressure in the range 10-300 PA (OBR is the method in comparison with the prototype is 55.2% and

Comparative evaluation of quality indicators are presented in table.1 samples of base paper also shows that hydrophilic and absorption properties, characterized, respectively, by the terms of duration of lifting water to a height of 25 mm and duration of saturation viscose, increase to a greater extent at the base paper for the proposed method than analogue. Thus, the maximum reduction in the duration of lifting water to a height of 25 mm is the analogue of 17.0% and the proposed method to 83.5%, This corresponds to reducing the duration of rise of water compared to untreated paper-based 1.2 times the equivalent and 6.1 times the proposed method.

Duration full impregnation of the paper base viscose maximally reduced after treatment 1.4 times the analog and 2.2 times the proposed method. However, reducing the duration of the complete impregnation of the paper base viscose solution is 30.2% and 54.5 per cent in analogue and proposed method, respectively.

Impregnation of the samples of the paper base viscose solution is carried out at concentrations of 7.0 percent during this determines the length of full paper impregnation viscose.

With the VA base paper, the proposed method is lower than that of analog. This is because flax fiber for a number of important parameters are significantly inferior to the Manila hemp fibers. These differences in properties associated with the peculiarities of morphological structure and parameters of the supramolecular structure of flax fibers. In particular, Manila hemp fibers have low degrees of development of a greater range of macro - and micropores than flax fibre, which is probably the main reason for the high hydrophilicity and absorptivity of the paper base from Manila hemp.

In this regard, it is very important a large zoom ratio of hydrophilic and absorption properties of the base paper, the proposed method in comparison with the similar.

P R I m m e R 2. Bleached flax pulp grind in a laboratory roll to the degree of grinding of the 25aboutSHR and used to make samples of the paper base shell sausages following composition, wt. Cellulose flax 80,0 Fiber viscose 18,0

Resin polyamidoamine - chlorohydrin 2,0

In milled flax pulp add prepared viscose fiber and polyamide-aminopyrrolidine resin.

Uchenye samples of the paper base impregnated on a laboratory press binder, which is used as a 3% solution of polyvinyl alcohol.

Sample processing base paper of low-temperature plasma is carried out with a sequence of operations, described in example 1. Processing options paper-the basics of low-temperature plasma: the pressure in the discharge chamber 130 PA, length 30 s, the power density of the discharge 0,002; 0,003; 1,2; 3,0 and 3,2 W/cm3accordingly, for the paper samples 1, 2, 3, 4, and 5.

Changes in quality indicators collected in this way samples of the paper base shell sausage products after processing by low-temperature plasma on the proposed method in comparison with the prototype, and the analogue is presented in table.2.

Composition of base paper prototype the following, wt. Cellulose flax 85,0

(grinding until 23aboutSR) Cellulose cotton 13,0

Resin polyamidoamine - chlorohydrin 2,0

As follows from the data (see tab.2), the optimal power density discharge in the processing of paper-the basics of low-temperature plasma is a specific power in the range of 0.003 to 3.0 W/cm3(sample paper 2, 3 and 4). The maximum increase in capillary absorbency of paper in the process is the Umaga-the basis for the proposed method increases the rate of breaking stress is 1.5 times or by 53.8% (from 1.3 to 2.0 kg).

The data table.2 indicate that the maximum increase in capillary absorbency of paper in the process of the proposed method in comparison with the prototype is 145% (or 2.45 times).

From the above table.2 data suggest that the quality metric characterizing the hydrophilic and absorption properties of the paper base, increase in processing, as in example 1, to a greater extent in the proposed method than analogue. Thus, the maximum reduction in the duration of lifting water to a height of 25 mm is the analogue of 37.7% and the proposed method of 65.1% which corresponds to the reduction of the length of the rise of water compared to untreated paper-based and 1.6 times the analog and 2.9 times the proposed method.

The maximum reduction in the duration of full impregnation of the paper base viscose solution is after the treatment by the proposed method 51.2 per cent in that time, as similar to only 15.2% and 35.4% of the duration of the complete impregnation of the paper base viscose reduced after treatment by the proposed method in 2 times, and the similar just 1.2 and 1.5 times.

P R I m e R 3. Experienced paper-based sausage casings, and the positional composition of the base paper, wt. Cellulose flax 80,0 Fiber viscose 18,0

Resin polyamidoamine - chlorohydrin 2,0

Sample processing base paper size 300 x 200 mm carry out low-temperature plasma with the sequence of operations shown in example 1. The processing parameters of the base paper on the proposed method: the pressure in the discharge chamber 120 PA, the power density of the discharge of 1.1 W/cm3the duration of 3, 5, 80, 360 and 370, respectively for samples of paper 1, 2, 3, 4, and 5.

In table.3 shows the changes of indicators of the quality of the paper base casings in the process of low-temperature plasma on the proposed method in comparison with the prototype and similar.

As follows from the data table.3, the proposed method significantly improves the hydrophilicity of the paper base, almost without reducing its strength. The optimal duration of plasma chemical treatment of the paper base is the duration within 5-360 (samples 2, 3 and 4). The maximum increase in capillary absorbency of the paper base of the proposed method is in the machine and transverse direction 180 and 246% (or 3.2 and 3.5 times, respectively.

Data, as the processing of low-temperature plasma in comparison with the prototype is 240 and USD 266.7% (or 3.4 and 3.7 times in the machine and transverse direction, respectively.

From the above table.3 data suggest that the quality metric characterizing the hydrophilic and absorption properties of the paper base, increase in processing the proposed method to a greater extent than similar, as in examples 1 and 2. Thus, comparing the duration of lifting water to a height of 25 mm suggests that the proposed method maximum reduction of this indicator is 89,6 and 92.1% in machine and transverse direction, respectively, and have similar total 17.0%, This corresponds to reducing the duration of lifting water to a height of 25 mm compared with untreated paper-based and 12.7 9.7 times in the machine and transverse direction, respectively, of the proposed method and 1.2 times the equivalent.

As noted above, the proposed method improves the absorption properties of the paper base to a greater extent compared to analogue, which is characterized by a reduction in the length of full paper impregnation viscose solution. This is a great advantage of the proposed method, as it helps to increase the speed of production of the final product and ensures uniformity and completeness of penetration of the impregnating solution, the person who spent a component of the domestic base paper.

Thus, the maximum reduction in the duration of full impregnation of the paper base viscose solution is after processing the proposed method of 41.7% and similar only to 25.3 and 30.2%

P R I m e R 4. Experienced paper-based sausage casings produced in industrial conditions in the prototype method, impregnated with a binder, which is used as a 3% solution of polyvinyl alcohol.

Composition of base paper, wt. Cellulose flax 75,0 Fiber viscose 13,0 Cellulose cotton 10,0

The polyamide resin-aminee - chlorohydrin 2,0

Sample processing base paper size 300x200 mm carry out low-temperature plasma with the sequence of operations shown in example 1. The processing parameters of the base paper on the proposed method: specific power discharge to 1.0 W/cm3the duration of treatment with 20, the pressure in the discharge chamber 5, 10, 140, 300, and 325 PA, respectively, for the paper samples 1, 2, 3, 4, and 5.

The results of changes in indicators of quality base paper casings in the process of the proposed method in comparison with the prototype, and the analogue is presented in table.4.

Are given in table. 4 data svidetelstvuet way, while maintaining its strength properties.

Thus, the maximum increase in capillary absorbency of the paper base in the process of the proposed method is in the transverse and machine direction 113,6 and a 147.7% (or 2.1 and 2.5 times, respectively. Compared with the prototype of this figure in the processing of low-temperature plasma on the proposed method increases on average 1.6 times or 60.3 and 64.9%, respectively in the machine and transverse direction, respectively.

The proposed method significantly reduces the duration of lifting water to a height of 25 mm, which also indicates the increasing hydrophilicity of the base paper in the process. The maximum decrease of this indicator in 14.4 and 20.4 times in the transverse and machine direction, respectively, compared to untreated paper. This reflects the reduction in the duration of the ascent of water in this case by 93.1 and 95.1%, respectively. For similar data on this indicator are not available.

Are given in table. 4 evidence suggests that the absorption properties of the paper base increase, as in examples 1, 2 and 3. To a greater extent in the process of the proposed method than analogue. Thus, the maximum reduction in proteoliposome 42.6% in that time, as the counterpart to 24.3% (sample 1) and 18.4% (sample 2), which corresponds to a reduction of 1.7 times the proposed method and 1.3 times (sample 1) and 1.2 times (sample 2) analogue.

It should be noted that in the proposed method, hydrophilic and absorption properties of laboratory samples of base paper (examples 1 and 2) than in industrial design base paper (examples 3 and 4) before treatment and after it. In addition, the degree of increase of these properties during processing is also higher in the case of industrial designs. Laboratory conditions make it almost impossible to obtain a base paper with a uniform highly porous structure because of the impossibility of modeling required in this case process of ebb and especially drying. Thus, the experiment on the processing of paper-the basics of low-temperature plasma (the proposed method) was introduced in tougher conditions.

These circumstances, as also noted in example 1, the characteristics of flax fibre, obviously reducing hydrophilic and absorption properties of the base paper (the proposed method, prototype) compared with paper-based out of Manila hemp (analog) are the main reason for the comparison Athena method. This estimate, in our opinion, is in this case the most correct and the only possible.

P R I m e R 5. Laboratory sample base paper casings composition according to example 1, as well as industrial design base paper composition according to example 3, produced by the method prototype, treated with low temperature plasma of the proposed method. Before processing the industrial design of the paper base impregnated with a binder, which is used as a 3% solution of polyvinyl alcohol.

Sample processing base paper size 300 x 200 mm carried out in the sequence of operations shown in example 1. The processing parameters of the base paper on the proposed method: the pressure in the discharge chamber 120 PA, the power density of the discharge of 1.2 W/cm3the processing time of 15 sec.

In these samples was determined by the change in absorption properties in the process of the proposed method immediately after it, and again after 2 months of storage. The results are presented in table.5.

From the data table.5 it follows that the absorption properties of the base paper casings on complete impregnation of the paper base viscose solution increases at a similar 2.3 times (untreated sample) and 2.3 and 1.7 times (processed samples 1 and 2) after 2 months of storage. At the same time, the proposed method increases the duration of the full impregnation of the paper base viscose solution during storage, both for laboratory and industrial samples is lower than that of similar and is, on average, 1.2 times.

The choice of operating parameters of the processing base paper of low-temperature plasma on the proposed method is illustrated by the data table.6.

The present invention, as an environmentally friendly way, it helps to reduce the duration of the full impregnation of the paper base viscose compared to analogue. This is a very important advantage, as it helps to increase the speed and production of the final product and ensures uniformity and completeness of penetration of the impregnating solution.

A METHOD of IMPROVING HYDROPHILICITY PAPER WRAPPERS FOR FOOD PRODUCTS containing cellulose from bast, cotton and/or viscose fibers and resin, characterized in that the base paper is subjected to the processing of low-temperature plasma of high-frequency glow discharge in oxygen atmosphere for 5 360 at a pressure of 10 to 300 PA and the power density of the discharge of 0.003 to 3.0 W/cm3.

 

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