Method of manufacturing double-layer sheet microporous material for ink-pads

FIELD: polymer materials.

SUBSTANCE: invention relates to a method for manufacturing equal-thickness elastic microporous polyvinylchloride material constituted by metering and storage layers attached to attached to each other by a system of through holes. Metering layer composition is prepared from, wt %: polyvinylchloride 25-40, dibutyl or butylbenzyl phthalate 15-25, T-92 oxal as flotation reagent 15-25, and triethylene glycol 20-35. Measured quantity of composition is uniformly distributed at a rate 0.07-0.16 ml/cm2 in lower portion of metallic or glass mold restricted from three sides by flat barriers with suitable height, thermally treated in strictly horizontal position at 80-110°C to transform liquid state into solid state, and cooled to temperature not higher than 35°C, after which mold is closed with flat upper portion, the twp portions are clamped, mold is installed in upright position, and composition contained in storage layer is poured in slot-like space at following proportions of components, wt %: polyvinylchloride 12-20, dibutyl or butylbenzyl phthalate 16-26, oxal T-92 11-13, triethylene glycol 12-17, and sucrose 30-45. Thereafter, contents are thermally treated in vertical and inclined positions at 150-180°C for 15-50 min until composition is completely gelled. When cooled to ambient temperature, sheet is removed, washed out in water from sucrose and triethylene glycol, and dried. Thus prepared material is characterized by thickness of metering layer about 0.7 to 1.6 μm, pore size if metering layer not larger than 1 μm, the same in storage layer 20 to 800 μm, and total porosity 40-55%. The sheet is cut into green products for ink-pads with required shape and dimensions and glued to a bottom of small box to be latter soaked with required amount of suitable ink.

EFFECT: enabled manufacturing high-quality ink-pad (especially exchangeable ones for automated equipment), which are able of metering ink, which allows printing of several thousands of clear nonspreading prints.

4 dwg, 1 tbl, 4 ex

 

The invention relates to a marking and organizational techniques, and more specifically to the manufacture of material for stamp pad.

Two-layer materials for stamp pad known for a long time. The top layer, which touches the stamp or seal, provides the required level of treskowallee on the surface of the stamp pads and is dosing, or cracovialemon. It has low porosity and contains fine through pores. The lower, thicker layer, tightly connected with the top, has a much higher total porosity and the size of the through pores, contains a supply of toner composition and is a tank, or krasnoderevshik. This design compared to the single-layer stamp pillows allows you to achieve the best print quality, and a larger number of prints.

Famous stamp cushion (U.S. Pat. Germany No. 1561346, MKI 41 To 1/54, publ. 18.10.1975,), in which krasnoderevshic layer is made of foam, and the dosing is of fine silk fabric.

Famous stamp cushion (U.S. Pat. U.S. No. 6640709, MKI 101/333; MCI 41 To 1/54, publ. 4.11.2003,), in which the reservoir layer consists of pressed and glued together non-woven polypropylene fibers and kraskopultami - of cotton fabric, similar to suede.

Famous stamp cushion (U.S. Pat. Russia is the 2172260, MCI 41 To 1/54, publ. 20.08.2001,) of the two-layer composite material, in which the upper layer has a porosity of from 20 to 45% and a pore size of from 10 to 80 μm, and the bottom layer is the porosity of from 40 to 85% and a pore size on the order higher than that of the upper layer. The material of the upper layer can be silk, cotton, polyester and other fabric, non-woven material based on polypropylene fibers, thin felt, etc. of the Lower layer is made of thermoplastic woven or non-woven material based on polyurethane, polyethylene, polyethylene terephthalate, copolymer of ethylene with propylene, polybutadiene, natural rubber, etc. In the patent also notes that "the pores in the above-mentioned layers... can't be the same size even in the same layer and the dispersion of the quantity values then can reach the order of 10".

The disadvantage of all the above analogs of the present invention is used as Krasnoprudnaya layer is not regulated by the thickness of the pre-made thin woven or non-woven materials with very heterogeneous largest end-to-end pores. In addition, additional procedures are required for the connection (gluing, welding, etc. of these materials with krasnoderevshik layer. These circumstances prevent the metering layer stamp pillows with optimal properties that neg the adverse impacts on the resource and the quality of printing.

Known two-layer stamp cushion (U.S. Pat. U.S. No. 5136968, MKI 118/264; MCI In 05 With 1/00, publ. 11.08.1992,), in which kraskopultami layer has a porosity of from 40 to 85% and the size of the open pores of less than 30 μm, and krasnoderevshic - more than 70% and the amount of open pores from 80 to 1000 μm. The ratio of the thickness of the metering layer to the reservoir is in the range from 1:4 to 1:10. Kraskopultami layer is made of polyolefin, copolymer of ethylene with vinyl acetate, vysokoorientirovannogo of polyvinylformal, nitrile rubber or sintered granules of polyethylene.

Krasnoderevshic layer is made from nizkozatratnogo of polyvinylformal, polyurethane based on simple or complex polyesters, polystyrolconcrete or melamineformaldehyde.

In this technical solution dosing layer can be adjusted in thickness and has a fairly uniform microporous structure, which allows to achieve an acceptable level of treskowallee, and hence the quality of the imprint. The disadvantage discussed stamp pillows is the fact that the above two layers are made of dissimilar materials and are connected purely mechanically by means of the bounding box (chassis bottom). This imposes certain additional requirements to design the box for the stamp pad and does not always ensure reliable the contact between the layers, what can complicate the transfer of ink between them and thereby affect the resource and the print quality. In the optimal two-layer material for stamp pad layers with different structures shall be firmly over the entire area of connected, mutually penetrate each other, forming a linked system of open pores, which ensures a smooth transition of the dye composition from the reservoir layer in dosing.

The closest technical solution is U.S. Pat. Russia №2159782, MKI C 08 L 27/06, publ. 01.03.1999 was selected as a prototype. It should be noted that this patent is the closest to the claimed only partially, namely: composition and method of its processing with the aim of obtaining otkritosty sheet materials from vinyl plastisol (PVC-plastisol), which can be used in the manufacture of the metering layer, but does not describe the process of creating a two-layer material for stamp pad, what is the purpose of this invention.

Accretivity material was obtained as follows. Prepare composition (PVC-plastisol) in the following ratio, wt.%:

Polyvinyl chloride (paste) 43,3-29,3

Plasticizer diphenylmethylphosphine (DFCF) 15,1-34,2

Triethylene glycol (TEG) 32,5-48,0

It is stirred in a mixer at room tempera is ur within 15-30 min, Tegaserod 0.5 to 2 hours, poured into a metal mould size (350·400) mm and subjected to gelatinization at a temperature (160-180)°C. Extracted from the heating Cabinet shape is cooled to (30-50)°and remove the leaves that are washed with water and dried at a temperature (40-60)°C. the result accretivity material with a total porosity of from 39 to 49% and an average pore size from 1.4 to 2.6 μm. (The average pore size is determined by the equation Poiseuille flow the amount of air that has passed through the sample at a given pressure). This material has sufficient gas permeability, and his offer to apply for finishing internal surfaces of residential and industrial buildings.

This solution cannot be used for manufacturing two-layer material for stamp pad for the following reasons:

- cannot provide reservoir layer with high porosity and, consequently, good Krasnodarskaya ability, as recommended in the above patents;

- DFCF is not possible to produce highly elastic PVC-cellular plastics, because it does not have sufficient compatibility with the polymer, and, in addition, is a highly toxic substance;

- heat treatment of the PVC plastisol in the usual open metal forms not result in absolutely equal thickness was smooth the two sides of the sheet, you want to high quality stamp pad, removable especially used in automatic samoobrazovaniya seals. Side formed in contact respectively with metal and air, very much even visually differ from each other due to different speed warm-up song.

The aim of the present invention is a method for manufacturing of equal thickness was smooth elastic microporous material consisting of interconnected unified end-to-end long and mutually penetrating each other Krasnoprudnaya and krasnoderevshik layers. This material is used as the basis for stamp pad, particularly those used in automatic snap-ins for the seals.

The proposed method is as follows.

Prepare the PVC composition No. 1 for metering layer, wt.%:

- PVC brand EP 6602-With or EP 6202-C (GOST 14039-79) 25-40;

- Dibutyl phthalate (DBP) (GOST 8728-77) or butylbenzylphthalate (BBF) (TU 6-05-1347-75) 15-25;

- Flotation-oxal brand T-92 (TU 2452-015-48158319-2000) 15-25;

TAG (TU 6-01-5-88) 20-35.

Flotation-oxal brand T-92 is a mixture of polyhydric dioxane alcohols with a boiling point of about 280°C. It is a low-toxic substance (hazard class 4 according to GOST 12.1.007) with a mass fraction of hydroxyl groups (24-35)%.

It is nosily No. 1 is stirred with a stirrer at room temperature for 30-40 minutes and vacuum (1.0 to 1.5) PM

Prepare the PVC composition No. 2 reservoir layer, wt.%:

PVC 12-20;

DBP (BBF) 16-26;

Flotation-oxal brand T-92 11-13;

TAG 12-17;

Sucrose 30-45.

Sucrose (cane or beet or cane sugar) is pulverized using a ball mill or mill type grinder to a fine powder (powder). The particle size defined by sieve analysis, is in the range from 63 to 1000 μm, and most of them has a value from 315 to 630 μm.

Composition No. 2 is stirred with a stirrer at room temperature for 40-60 minutes and vacuum (2-3) hours

Composition No. 1 fill with a syringe from the calculation (0,07-0,16) ml per 1 cm square in the lower part of the flat shape (figure 1). It is made of metal or glass and has three sides flat barriers that height close to the required thickness of the double layer of material for stamp pad (usually 3-6 mm). The lower part forms incline at different angles so that the PVC plastisol evenly spread over the entire area. Hereinafter composition No. 1 warm up on a smooth horizontal heated plate of the appropriate size (or in a heat chamber, if it is possible to have the form completely horizontally) at a temperature (80-110)°usually within (3-8) minutes before switching the PVC plastisol from liquid to solid. The strength obtained with the HH should be sufficient for so it is not destroyed in subsequent operations.

The lower part of the mould is cooled to a temperature not above 35°C, closed flat lid (top part of the form) (figure 2 and figure 3) and fasten the two parts form a spring metal clamps type "clothespin" (not shown) along the above three parties, where there are flat barriers. The number of clips selected so to ensure sufficient tightness of the form.

Assembled mould is installed vertically (figure 4) and in a slit-like space filled with composition No. 2 on high (15-20) mm below the top edge. Then form inclined or vertically (to overflowing composition) is placed in a heat chamber with a temperature of from 150 to 180°and is heated from 15 to 50 minutes to complete gelatinization of plastisol. The heat treatment time is selected empirically depending on the type of oven treatment, the number of shapes, sizes, etc. Then the form is removed from the heat chamber, cooled to room temperature, open and remove the sheets of two-ply material. They washed in water that can be heated up to 50°With the purpose of accelerating the process to remove the TAG and sucrose and dried at a temperature not exceeding 50°C. the result of equal thickness was smooth microporous sheet composed of interconnected system through pores and mutually penetrating each other Kras is oberegayushih and krasnoderevshik layers.

Additional studies have shown that the metering layer has (depending on recipe) apparent density ˜(800-1000) kg/m3the porosity (volume of through pores) ˜from 20 to 35% and the approximate size of the pores (determined qualitatively under a microscope at a hundred-fold increase) not more than 1 μm. Corresponding indicators of the reservoir layer (depending on the recipe):

- apparent density ˜(470-650) kg/ m3;

- porosity ˜(45-60)%;

the pore size of from 20 to 800 μm.

From ready-made two-layer sheet cut down or cut out the blank stamp pad of the desired size, put them and, if necessary, glued in boxes (bottoms), then gradually impregnate stamp ink and close the lid. (To reduce time washing a double layer of material and reduce the amount of wastewater possible cutting pieces of stamp pad slightly larger in size from lepromatosa in the water sheet. This is to be confirmed experimentally in each particular case, but generally the increase is ˜(5-6)% compared with the desired value. In the process of further washing and drying the workpiece reaches the desired size). In the end you get a stamp pillows, providing a large number of high quality prints due to the uniform metered allocation cu is generating composition on the surface of the products.

Examples of implementation of the proposed method.

Example 1.

Composition is prepared metering layer, wt.%:

- PVC EP-30;

- DBP 20;

- Flotation-oxal brand T-92 20;

TAG 30.

It is stirred at room temperature for stirrer speeds ˜100 rpm for 40 min and vacuum to remove air 1 o'clock

Prepare the composition of the reservoir layer, wt.%:

- PVC EP-12;

- DBP 23;

- Flotation-oxal brand T-92 11;

TAG 14;

- Sucrose (fine powder) 40.

It is stirred at room temperature for stirrer speeds ˜100 rpm for 50 min and vacuum to remove air 2 hours Take the lower part of the glass forms (glass thickness 3 mm) with dimensions usable area (18·24) cm and a height of flat glass barriers 6 mm and fill it with a syringe 40 ml of the composition dosing layer, i.e. 0,093 ml/KVM With appropriate tilt level plastisol across the work surface, put the bottom part of the form on a flat heated metal plate with temperature the surface is about 90°With, stand there for 6 min and cooled to a temperature of not higher than 30°C. Cover the lower part forms a glass plate (upper part) and fasten both parts of the shape with three sides four metal spring clips (two on the bottom and one the mu on the sides). Assembled mould is installed vertically and the top in a slit-like space gradually pour the composition of the reservoir layer to a height of approximately 20 mm below the top edge. Then the form is placed on the pallet is tilted in (10-15) degrees (to pour the composition), and the pan - heat chamber with convection heating. The form is heated at 160°20 min, removed from the heating Cabinet, cooled to room temperature for 40 min, open it and remove the sheet of plastic material. The sheet is washed in warm water to remove the TAG and sucrose (a symptom of this is the termination pricing) and dried at room temperature. Finish strong elastic two-layer cellular plastic has an apparent density ˜630 kg/ m3total porosity 49.5%of the total thickness ˜5.1 mm, and the thickness of the metering layer of about 0.9 mm Size of pores dosing layer does not exceed 1 μm, but the reservoir is in the range from 20 to 800 μm. From a sheet cut out 12 discs with a diameter of 48 mm and glued in place like glue "Moment 1" in the plastic bottom of a box for a replaceable ink pads automatically snap to stamp seals with a diameter of 45 mm, Such tooling are issued by firms TRODAT and COLOP (Austria). The top liners impregnated with 3 g of the corresponding stamp paint, clean the surface from possible contamination, cover cap is coy and get ready stamp pillow. The results of her tests will be given below.

Example 2.

Composition is prepared metering layer, wt.%:

- PVC EP-35;

- BBF 15;

- Flotation-oxal brand T-92 15;

TAG 35.

It is stirred at room temperature for stirrer speeds ˜100 rpm for 40 min and vacuum to remove air 1,5 hours

Prepare the composition of the reservoir layer, wt.%:

- PVC EP-14;

- DBP 26;

- Flotation-oxal brand T-92 13;

TAG 17;

- Sucrose (fine powder) 30.

It is stirred at room temperature for stirrer speeds ˜100 rpm for 30 min and vacuum to remove air 1 o'clock Take the lower part of the glass forms (glass thickness 3 mm) with dimensions usable area (18·24) cm and a height of flat glass barriers 4 mm and fill it with a syringe 30 ml of the composition dosing layer, i.e. of 0.07 ml/KVM With appropriate tilt level plastisol across the work surface, put the bottom part of the form on a flat heated metal plate with temperature surface 110°With, stand there for 4 min and cooled to a temperature of not higher than 30°C. Cover the lower part forms a glass plate (upper part) and fasten both parts of the shape with three sides four metal spring clips (two on the bottom and on the approach side). Assembled mould is installed vertically and the top in a slit-like space gradually pour the composition of the reservoir layer to a height of approximately 15 mm below the top edge. Then the form is placed on the pallet is tilted in (10-15) degrees (to pour the composition), and the pan - heat chamber with convection heating. The form is heated at 150°18 min, removed from the heating Cabinet, cooled to room temperature, 45 min, open it and remove the sheet of plastic material. The sheet is washed in warm water to remove the TAG and sucrose (a symptom of this is the termination pricing) and dried at room temperature. Finish strong elastic two-layer cellular plastic has an apparent density ˜650 kg/m3total porosity 43.6%, and the total thickness of ˜3.4 mm, and the thickness of the metering layer is about 0.7 mm Size of pores dosing layer does not exceed 1 μm, but the reservoir is in the range from 20 to 800 μm. From a sheet cut down to 4 liner size (110·70) mm and glued in place like glue "Moment 1" plastic bottom boxes for stamp pad, and then impregnated with 8 g of the respective colors. The result is a product that is able to provide not less than 5000 high-quality prints.

Example 3.

Composition is prepared metering layer, wt.%:

- PVC EP-25;

- DBP 25;

- Flotation-oxal Mar and T-92 25;

TAG 25.

It is stirred at room temperature for stirrer speeds ˜100 rpm for 40 min and vacuum to remove air 1,5 hours

Prepare the composition of the reservoir layer, wt.%:

- PVC EP-16;

- BBF 16;

- Flotation-oxal brand T-92 11;

TAG 12;

- Sucrose (fine powder) 45.

It is stirred at room temperature for stirrer speeds ˜100 rpm for 60 min and vacuum to remove air 3 hours Take the bottom of the metal (stainless steel) forms (wall thickness 1 mm) with dimensions usable area (18·24) cm and a height of flat steel barriers 6 mm and fill it with a syringe 70 ml of the composition dosing layer, i.e. 0.16 ml/KVM With appropriate tilt level plastisol across the work surface, put the bottom part of the form on a flat heated a metallic plate with a surface temperature of about 80°With, stand there for 8 min and cooled to a temperature of not higher than 30°C. Cover the lower part of the shape of the steel plate (upper part) and fasten both parts of the shape with three sides four metal spring clips (two on the bottom and one on each side). Assembled mould is installed vertically and the top in a slit-like space gradually pour the composition of the reservoir layer on visitamilitare 20 mm below the top edge. Then the form is placed vertically in the heat chamber and convection heating. The form is heated at 180°15 min, removed from the heating Cabinet, cooled to room temperature, 50 min, open it and remove the sheet of plastic material. The sheet is washed in warm water to remove the TAG and sucrose (a symptom of this is the termination pricing) and dried at room temperature. Finish strong elastic two-layer cellular plastic has an apparent density ˜610 kg/m3total porosity ˜52%of the total thickness ˜5.2 mm, and the thickness of the metering layer is about 1.6 mm Size of pores dosing layer does not exceed 1 μm, but the reservoir is in the range from 20 to 800 μm. From a sheet cut out 12 discs with a diameter of 48 mm and glued in place like glue "Moment 1" in the plastic bottom of a box for a replaceable ink pads automatically snap to stamp seals with a diameter of 45 mm, top Liners impregnated with 3.5 g of the corresponding stamp paint, clean the surface from possible contamination, close the lid and get ready stamp pillow with yields not less than 3000 high-quality prints.

Example 4.

Composition is prepared metering layer, wt.%:

- PVC EP-40;

- DBP 20;

- Flotation-oxal brand T-92 20;

TAG 20.

It is stirred at room temperature for stirrer with what speed ˜ 100 rpm for 40 min and vacuum to remove air 1,5 hours

Prepare the composition of the reservoir layer, wt.%:

- PVC EP-20;

- 16 DBP;

- Flotation-oxal brand T-92 12;

TAG 12;

- Sucrose (fine powder) 40.

It is stirred at room temperature for stirrer speeds ˜100 rpm for 50 min and vacuum to remove air 2 hours Take the lower part of the glass forms (glass thickness 3 mm) with dimensions usable area (18·24)cm and a height of flat glass barriers 6 mm and fill it with a syringe 40 ml of the composition dosing layer, i.e. 0,093 ml/KVM With appropriate tilt level plastisol across the work surface, put the bottom part of the form on a flat heated metal plate with temperature the surface is about 100°With, stand there for 5 min and cooled to a temperature of not higher than 30°C. Cover the lower part forms a glass plate (upper part) and fasten both parts of the shape with three sides four metal spring clips (two on the bottom and one on each side). Assembled mould is installed vertically and the top in a slit-like space gradually pour the composition of the reservoir layer to a height of approximately 20 mm below the top edge. Then the form is placed on the pallet is tilted in (10-15) degrees (to the e poured composition), while the pallet is in the heat chamber and convection heating. The form is heated at 160°22 min, removed from the heating Cabinet, cooled to room temperature for 40 min, open it and remove the sheet of plastic material. The sheet is washed in warm water to remove the TAG and sucrose (a symptom of this is the termination pricing) and dried at room temperature. Finish strong elastic two-layer cellular plastic has an apparent density ˜645 kg/m3total porosity 43.2%of the total thickness ˜5.1 mm, and the thickness of the metering layer of about 0.9 mm Size of pores dosing layer does not exceed 1 μm, but the reservoir is in the range from 20 to 800 μm. From a sheet cut down 12 liners in the form of discs with a diameter of 45 mm with two cut segments (the distance between the edges 41 mm) and glued in place like glue "Moment 1" in the plastic bottom of a box for a replaceable ink pads to automatic equipment for seals with a diameter of 40 mm, Such tooling is very widespread and are issued by companies TRODAT and COLOP (Austria). The top liners impregnated with 3.2 g of the corresponding stamp paint, clean the surface from possible contamination, close the lid and get ready stamp pillow. The product provides not less than 4000 high quality prints.

To illustrate the claimed invention were conducted sravnitel is by testing three interchangeable stamp pad ink blue for automatic snap-TRODAT 46045 (Austria) with a rubber seal with a diameter of 45 mm, made according to GOST R 51511-2001.

The first cushion (type No. 10) manufactured by the company "Schedule-M" (Moscow) in accordance with their patent RF №2172260 described above, and the second (type TRODAT 6/46145) - firm "Trodat of XXI century" (Moscow) on similar technology, but probably with a different degree of impregnation. The third removable cushion made according to Example 1 of the present invention. Printing was carried out manually with the speed (20-30) prints per minute on sheets of standard white paper for office equipment A4. After another 500 prints stamp cushion weighed accurate to hundredths of a gram. After every 500 prints test was interrupted at (1,0-1,5) h, and after every 1000 impressions (15-20) C. the Results are given in the table.

№ p/pSample stamp pillowsThe amount of the coloring composition used for the next 500 prints in the following intervals printing, gInterval quality printing, PCs printsThe total amount of released dye, g
0-500501-10001001-15001501-20002001-2500
1Schedule M, No. 101,250,49 0,190,130,11from ˜700 - ˜12002,17
2Trodat 6/461450,710,150,13--------from ˜200 to ˜5000,99
3According to the invention0,330,200,200,150,131 to ˜15001,02

Table data and visual assessment of the quality of the prints show that stamp pillows, taken as the analogue of the claimed invention, in the initial period of the test print is very dirty, allocate too much paint (No. 1 to approximately 700 prints, and No. 2 is approximately 200 prints, which is probably associated with a lesser degree of impregnation). Then comes an interval of relatively high-quality printing (No. 1 from ˜700 - ˜1200 prints (just ˜500 prints), No. 2 - from ˜200 to ˜500 sheets (300 prints), then the imprint is becoming more and more pale and fuzzy, and after level ceskootchy ˜0,13 g 500 prints - very unsatisfactory. Stamp cushion No. 3 provides a clear neraspavsheysya vivid from the first to the approximately 1500 imprint. Thus, stamp cushion made ACC is accordance with the invention, network with the start of operations, quality printing, and its resources are several times higher than its competitors.

The results of the comparative experiment allow us to conclude that the proposed method satisfies the requirement of industrial applicability.

Conducted by the author of the review of scientific literature and patent search in the collections of the USSR, Russia, USA, Germany, France, Switzerland classes MCI 41 To 1/54; C 08 L 27/06; C 08 J 9/26; C 08 J 9/28 and their corresponding classes of the national classification (in particular, the US 101/333, 118/264, 101/327, 101/367) did not reveal a method of manufacturing a two-layer sheet of microporous material for stamp pad that matches announced for the whole set of distinctive features.

Therefore, this invention meets the criteria of novelty, as it is unknown in the prior art.

The present invention meets the condition of "inventive step" for the following reasons:

1. During the experiments was set previously unknown fact that flotation-oxal brand T-92 is not only a secondary plasticizer of PVC, but is well combined with the TAG already at room temperature. This made it possible to obtain not exfoliating at room temperature for a sufficiently long time plastisol composition containing p is ruinae plasticizers polymer (DBP, BBF) (and, accordingly, on the basis of elastic solid materials) and are not compatible with them at room temperature liquid low water-soluble TAG. The TAG does not interact with PVC and form a separate phase when its gelatinization, acting as a blowing agent. Without flotation reagent-oxala brand T-92 plastisol, including DBF (BBF) and TAG settle almost instantly, and can not be processed. Thus detected not previously described property of the flotation reagent of oxala brand T-92 to be homogenizer above composition.

2. It was first discovered that extensive system through pores of different size necessary for krasnoderevshik highly porous layer can be obtained only with a combination of PVC-plastisol liquid (TAG) and solid (sucrose) pore-formers. Using each of them separately (even in a larger number) does not provide the desired result. Thus, the introduction into the composition TAG without sucrose in the amount of 45 wt.% (after its extraction with water to obtain at least the minimum required porosity) results depending on the concentration of other components or to the creation of fragile materials (PVC 20%, DBP 20%flotation-oxal brand T-92 15%), or to release vysokoplastichnyh very soft, low fourmeau what ustoichivosti cellular plastics with porosity ˜ 45% (PVC 16%, DBP 23%flotation-oxal brand T-92 16%). These sheets are unsuitable for stamp pad, particularly those used in automatic snap-ins for the seals. They will quickly and permanently deformed when pressed by the seal or stamp, and their Krasnodarskaya capacity is not large enough. Increasing the concentration of TAG in the plastisol to 55% (in an attempt to increase the porosity) is uniquely associated with very low strength and the imminent destruction of the product.

The use of sucrose without TAG creates PVC materials mainly closed porous structure where the pores are poorly linked, and the process of washing water pore-forming water is slow. Increasing the concentration of sucrose in the original composition does not change the result. Already at 50 wt.% get high viscosity plastisol, which is bad is poured into the form, and after heat treatment, with difficulty extracted from it in the form of a sheet, because it strongly adheres to the surface. But most importantly, the product still has a porosity (% open pores) not more than 13%.

This phenomenon is understandable, since the liquid plasticizers and distributed them micron particles of paste PVC fully envelop all particles of sucrose, and after gelatinization polymer isolate them from each other, do not let the water for extraction and as a result, the ATA create a closed porous structure.

Only the introduction to the recipe krasnoderevshik layer at the same time liquid (TAG) and solid (sucrose) of pore solves the problem of obtaining an extensive system of open through pores.

The TAG does not interact with the polymer in the gelatinization process plastisol and forms a separate solid phase in the form of through-channels among swollen and fused between the granules PVC. When laundering is formed of material water easily dissolves TAG for any end-to-end pores penetrates to every part of the sucrose and quickly dissolves. In place of the solid particles of the pore-forming polymer plasticized frame are interconnected cavities filled with sucrose solution and the TAG in the water. In the course of further leaching sucrose and TAG are removed completely, the sheet is dried, and it retains the previously created extensive otkrytiya structure.

3. For the first time to obtain PVC-plastisols of equal thickness was smooth over the entire area of the sheets required for a quality stamp pad (especially interchangeable, which are used in automatic snap-ins for seals), exposed only on one side in the form of a slit glass or metal form, in which the top (figure 2) and the bottom plane (figure 1) with three sides separated from each other flat limiters is (figure 4). The form is subject to heat treatment in a vertical or inclined position, to prevent leakage of the composition.

All the above leads to the conclusion that the present invention patientopinion under current law, because it corresponds to conditions of industrial applicability, novelty and inventive step.

List of drawings description of the invention

Figure 1 - the lower part of the flat shape.

Figure 2 - the upper part of the flat shape (cap).

Figure 3 - the bottom part of the form with a metering layer, on which is placed the upper part of the form.

4 is a collected form, vertically, filled her composition reservoir layer.

A method of manufacturing a two-layer sheet of microporous material for stamp pad, consisting of a dosing tank and layers, including the production of a composition based paste of polyvinyl chloride, a plasticizer and a liquid blowing agent triethylene glycol, the heat treatment in the form, cooling and extraction of triethylene glycol with water, wherein the composition is prepared metering layer when the ratio of components, wt.%: polyvinyl chloride 25-40; dibutyl phthalate or butylbenzylphthalate 15-25; flotation-oxal brand T-92 15-25, triethylene glycol 20-35; evenly distribute measured its quantity is STW within 0.07-0.16 ml on 1 cm 2square the bottom of the metal or glass form, bounded on three sides by flat barriers to the appropriate height thermoablative in a strictly horizontal position at a temperature of 80-110°to transition from liquid to solid, cooled to a temperature not above 35°close the form flat top, fasten the two parts form clamps, install the form vertically, is poured into the narrow space of the composition of the reservoir layer when the ratio of components, wt.%: polyvinyl chloride 12-20; dibutyl phthalate or butylbenzylphthalate 16-26; flotation-oxal brand T-92 11-13, triethylene glycol 12-17, sucrose 30-45; thermoablative in a vertical or inclined position at a temperature of 150-180°for 15-50 minutes to complete gelatinization of the composition is cooled to room temperature, remove the sheet, washed in water from sucrose and triethylene glycol, dried, and cut the finished microporous layer material on preparations for the stamp pad of the appropriate size.



 

Same patents:

FIELD: filled plasticized polyvinyl chloride compositions for linoleum production.

SUBSTANCE: claimed composition contains suspended polyvinyl chloride as film-forming agent; di-(2-ethylhexyl)-phthalate as plasticizer; stearic acid and complex stabilizer as stabilizers; chalk and pigments as filler. Additionally composition contains mixture of crezyldiphenyl phosphate and liquid chlorinated paraffin in ratio of 3:1 as plasticizer and three-based lead sulphate as stabilizer and aluminum hydroxide and antimony trioxide as fire-retardant additives. Obtained rolled material has the next burning quality: smoke gases temperature of 120-135°C; damage ration in sample length of 60-65 %; damage ration in sample mass of 17-20 % and duration of spontaneous burning of 0 seconds.

EFFECT: improved fire retardant material.

2 tbl

Resin composition // 2281961

FIELD: polymer materials, in particular composition for production of polyvinyl chloride-based film thermoplastic materials having increased freeze resistance.

SUBSTANCE: claimed composition contains suspended polyvinyl chloride, dioctyl phthalate, dioctyl sebacinate, butadienenitryl rubber and stabilizers. As butadienenitryl rubber composition contains grafted powdered butadienenitryl rubber CKN-33 Nitriflex NP-2183, and as stabilizer composition contains tin tioether Thermolite T890S, additionally it contains fat acid esters, such as butylstearate, stearylstearate, ethylstearate, polyethylene wax as plasticizer and Hostolux KS CFSC-OB-1, naphthotriazolylcumarin, 3-phenyl-7-triazomethylaminocumarin , 1,3,5-triphenylpyrosoline as luminophor.

EFFECT: polymer film of improved physical and mechanical characteristic and increased freeze resistance.

3 ex, 2 tbl

FIELD: rubber industry, medicine.

SUBSTANCE: invention proposes the composition for making medicinal technique articles comprises the following components, mas. p. p.: food butadiene-nitrile rubber, 100; polyvinyl chloride resin, 40.0-55.0; highly dispersed amorphous silica, 10.0-15.0; chalk, 40.0-60.0; dibutylphthalate, 35.0-40.0; zinc white, 1.0-1.5; stearic acid, 1.0-1.5; sulfur, 1.5-2.0; thiuram D, 0.35-0.4; thiazole 2MBT, 0.2-0.3 and diphenylguanidine, 0.2-0.3. The composition comprises additionally the following components that are thermodynamically incompatible with rubber, mas. p. p.: polymethylsiloxane liquid, 1.0-1.5; paraffin, 1.0-1.5, and technical carbon as a dye, 0.05-0.1. The composition provides preventing the release of components on the surface that effect pH value, turbidity change, oxidizing capacity and dry residue of the extract. Invention can be used in making articles of medicinal technique - rubber stoppers for sealing glass containers with infusion solutions, blood, blood substitutes and medicinal preparations for internal and external using prepared by industry and in pharmacy.

EFFECT: improved and valuable properties of composition.

4 tbl, 1 ex

FIELD: chemistry of high-molecular polymers.

SUBSTANCE: invention relates to polyvinyl chloride and its using. Proposed suspension polyvinyl chloride has Fickentcher's constant value Kf = 77-88, and it represents powder consisting of porous unclear particles characterizing the specific surface value 1.0-4.0 m2/g and the porosity value 0.27-0.42, and enhanced chemical stability in organic solvents also. Polyvinyl chloride is prepared by an aqueous-suspension polymerization of the reaction mixture comprising vinyl chloride, stabilizing agent and peroxide initiating agent at average polymerization temperature 35-42° and revolution rate of mixer 0.5-3.5 s-1. Polyvinyl chloride with abovementioned indices is used for making different plasticized materials with improved physical-mechanical indices.

EFFECT: improved and valuable properties of polymer.

3 cl, 2 tbl

FIELD: polymeric materials.

SUBSTANCE: abrasive-resistant composition material is made of composition comprising the following ratio of components, wt.-%: functional additives, 40-45; thermoplastic modifying agent, 28.14-43.5; hardening agent, 1-2; epoxy resin E-41, E-41r, the balance. Mixture of thermoplastic chlorine-containing modifying agent - perchlorovinyl resin and thermoplastic polymer taken in the ratio = (1:0.5)-(1:0.005) is used as a thermoplastic modifying agent. Thermoplastic polymer is taken among the following group: polystyrene, acryl-butadiene-styrene plastic, polyamide, polyethylene, polypropylene, copolymer of ethylene and vinyl acetate. Invention provides enhancing the adhesion strength and stability to abrasive wearing, among them, in effect of sign-variable and impact loadings and vibrations. Invention can be used in machine engineering for making functional coverings preventing wear of articles, constructions or aggregates as result of effect of abrasive and corrosive media, impact loadings and vibrations.

EFFECT: improved and valuable properties of material.

2 tbl, 13 ex

FIELD: polymer materials.

SUBSTANCE: invention relates to manufacture of simulated leather-type material with polymer coating, which can be used in making automotive tents, shelters, and for bundling of various technical tools. According to first option, material comprises textile backing and polymer coating formed on said backing with the aid of calender technique at the face and at the underside. Coating is composed of, weight parts: suspension polyvinylchloride (S-7058M) 100, di-2-ethylhexyl phthalate 20-60, di-2-ethylhexyl sebacate 5.0-20, trichloroethyl phosphate 5.0-15, "Vigostab BTs-42" 1.0-3.0, antimony trioxide 5.0-20, aluminum hydroxide 20-5.0, butadiene-nitrile rubber (BNKS-28) 30-0.1, thermoplastic polyurethane (VITUR 2213, 2513) 0.1-70, calcium stearate 0.5-2.0, and pigments 2.0-6.0, weight ratio of layers in material being as follows: face polymer coating/underside polymer coating = (0.3÷0.5):(0.2÷0.4). According to second option, material comprises textile backing and polymer coating formed on said backing at the face and at the underside, face-side polymer coating being formed with the aid of calender technique and composed of, wt parts: suspension polyvinylchloride (S-7058M) 100, di-2-ethylhexyl phthalate 20-60, di-2-ethylhexyl sebacate 5.0-20, trichloroethyl phosphate 5.0-15, "Vigostab BTs-42" 1.0-3.0, antimony trioxide 5.0-20, aluminum hydroxide 20-5.0, butadiene-nitrile rubber (BNKS-28) 30-0.1, thermoplastic polyurethane (VITUR 2213, 2513) 0.1-70, calcium stearate 0.5-2.0, and pigments 2.0-6.0, and underside coating being formed with the aid of deposition technique and composed of, wt parts: emulsion polyvinylchloride (EP-6602Ts) 100, di-2-ethylhexyl phthalate 20-60, di-2-ethylhexyl sebacate 5.0-20, trichloroethyl phosphate 5.0-15, "Vigostab BTs-42" 1.0-3.0, antimony trioxide 5.0-20, aluminum hydroxide 20-5.0, and pigments 2.0-6.0, weight ratio of layers in material being as follows: face polymer coating/underside polymer coating = (0.3÷0.5):(0.15÷0.3). According to second option, material represents film having the same composition as coating in the first option formed with the aid of calender technique, thickness of this film material ranging from 0.15 to 1.0 mm.

EFFECT: enhanced frost resistance, increased level of resistance to multiple bending (also at negative temperatures), and increased level of resistance to abrasion ensuring long service time.

3 cl, 2 tbl

Polymer composition // 2266308

FIELD: polymer materials.

SUBSTANCE: invention relates to polymer composition designed for use in mining, mineral concentration, and chemical industries, which composition contains polyvinylchloride, vinyl chloride/vinyl acetate copolymer, epoxide 4,4'-isopropylidenediphenol resin, dicyanediamide, dioctyl phthalate, calcium stearate, talc, and rubber crumb.

EFFECT: increased resistance of lining made of thermosetting composition to hydroabrasive wear.

2 tbl

FIELD: polymer materials.

SUBSTANCE: invention relates to rigid polyvinylchloride compositions including plasticizing and coloring fillers for manufacturing mainly building materials, which composition may be, in particular, used for manufacturing molded profiled articles. Multifunctional filler is constituted by bitumen-containing rock with 1-8% bitumen and used in amount of 1 to 20 wt parts per 100 wt arts polyvinylchloride.

EFFECT: reduced expenses, enhanced flowability of melt, imparted coloring effect without additional use of pigments, and extended application are for local raw material resources.

2 tbl

FIELD: polymers, glues, building materials.

SUBSTANCE: invention relates to the development of plasticized compositions based on emulsion and suspension polyvinyl chloride - plastisol that can be used in manufacturing linoleum for gluing median layer on a underwarp. Gluing paste comprising emulsion and suspension polyvinyl chlorides, ester plastizing agent dioctyl phthalate or EDOS - a mixture of dioxane alcohols and their high-boiling esters, chloroplast-300 and chloroparaffin-470, chalk, calcium stearate, neonol or accessory substance - OP-7 involves additionally metal-containing lubricant prepared interaction of alpha-branched saturated monocarboxylic acids of (C10-C28)-fraction with polyhydric alcohol at 180-220°C taken in the mole ratio = 1:(1-2) in the presence of bivalent metal oxides CaO, PbO, ZnO, MgO or their bicomponent mixtures taken in the ratio 1;1 and in the amount 0.5-2.0 wt.-% of the total reaction mass. As a polyhydric alcohol method involves using ethylene glycol, glycerol, polyglycerols - a vat residue after distillation of glycerol of the general formula: CH2OHCHOHCH2O-(CH2CHOHCH2O)nH wherein n = 1-3. Using the proposed polymeric gluing composition allows stabilizing viscosity of plastisol gluing paste, to expand assortment of polymeric gluing compositions used in manufacturing linoleum and to solve technological difficulties in preparing, processing and transport of plastisol.

EFFECT: improved and valuable properties of gluing paste.

2 cl, 1 tbl, 15 ex

FIELD: organic chemistry, chemical technology.

SUBSTANCE: invention relates to chemical modification of dioxane alcohols and their mixture with their esters and formals that are waste in manufacturing isoprene and used, in particular, as a secondary plasticizing agent in manufacturing polyvinyl chloride compositions. As a modifying agent method involves using at least one substance taken among the group including cyclic anhydride (preferably maleic anhydride, phthalic anhydride, phosphoric anhydride, succinic anhydride, waste in manufacturing phthalic anhydride) or cyclic amide (preferably caprolactam, butyrolactam) taken in the mass ratio alcohol (or mixture of alcohols with esters and formals):modifying agent = (0.56-400):1. Treatment is carried out at temperature 100-180°C for 2-6 h. Invention provides increasing yield of product, replacing high-expensive raw for inexpensive and more available raw, reducing temperature of the process, reducing acid number and the content of volatile impurities in the end product.

EFFECT: improved modifying method.

3 cl, 4 tbl, 12 ex

The invention relates to macroporous chitosan granules having a relatively large and uniform pore size of 30-150 μm inside and outside, which are distributed from the surface to the area of the nucleus, and the way they are received, which includes the following stages: adding dropwise chitosan solution, the aqueous chitosan solution, or a mixture thereof in the low-temperature organic solvent or liquid nitrogen; regulation of pore size using the method of phase separation due to temperature differences

The invention relates to the production of polymeric film materials with open-porous structure and, in particular, the capillary-porous permeable materials

The invention relates to the leather industry, and in particular to methods of fibrous porous materials from tannery wastes and can be used in the manufacture of footwear, leather goods and upholstery

The invention relates to methods for manufacturing compositions based on starch with uniformly distributed fibers, which can be used for the manufacture of packaging products and packaging materials

The invention relates to the production of a porous cross-linked polymeric materials of low density by emulsion polymerization type "water in oil" with a high content of the internal phase

The invention relates to ink the pad samarasimha stamp, comprising a housing with applied frame and movable in the housing from the initial position to the rotation position of die stamping and woodblock stamp bearing plate, which is connected with movable relative to the housing against the force of the return spring of the Executive arm, and ink pillow is made with the possibility of inserting into socket case is made essentially in the form of baths of podostemales
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