A method of obtaining a duplicate roll of binding material paper-based polyamide coating

 

(57) Abstract:

The invention consists in obtaining duplicate roll of binding material by applying a melt of the polymer copolyamid the characteristic viscosity at t = 35C[] = [0,6-1,3] DL/g and is characterized by only one endothermic peak at t = 150 - 230oC or melt of the above copolymer with functional additives in the ratio of 100:(0,03 - 5), respectively, and the melting is carried out in the extruder at t = 180 - 245othe duplication of the melt with the paper carried out at a temperature of the backup roll 15 - 60oC and a pressure of 3 to 170 kg/cm and the distance from the head of the extruder to the surface of the shaft duplicate, equal to 6 - 90 see Method allows you to get the duplicate roll of binding material paper-based polyamide coating with a thickness of 10 to 50 μm. 2 C.p. f-crystals, 1 table.

The invention relates to the field of production of duplicate materials based on paper with a polymer coating and can be used in the manufacture of coil binding materials.

Currently known methods for producing duplicate binding materials paper-based polyclinic films.

The production of a binding material with a nitrocellulose coating on the paper involves the preparation of the soil, consisting of micromastia, plasticizers, pigments, fillers, solvents, multiple layering on paper (Gagarinskaya L. A. and other Printing material. -M. : publishing house of the Book, 1975).

The disadvantages of this method of obtaining duplicate binding material is a multi-stage process, the use of solvents, a pair of which are in the room and the atmosphere, a significant number of initial components, difficult working conditions.

Recently in the domestic printing industry are used Bindery materials based on paper with a coating of polymer films. There is a method of duplicating paper with a polyethylene terephthalate film by means of adhesive layer, and a polyamide film, laminated with polyethylene.

This technology involves the production of films by extrusion lines blown, annealing the film, application of the adhesive layer or polyethylene, duplication of paper on the roll the equipment.

The disadvantages of these methods of obtaining Dublino the internal layers to promote adhesion to paper, the multistage process of obtaining, the disruption process, the considerable thickness of polymer coating (80-120 µm), which increases the intensity of products.

The closest analogue of the invention is a method of obtaining a binding material on a paper basis with PVC coating (see the book Zagarenski L. A., S. 280-281). This method of obtaining a binding material is a mixture of a polymer or a polymer with functional additives (plasticizers, stabilizers, fillers, pigments), which is a polymeric composition, the melting of the polymer mass, the polymer coating of the mixture on a paper basis is carried out on a 4-roller calender. This method does not allow to obtain a material with a thickness of less than 50 microns. Additionally, upon receipt of the material PVC is allocated HCl and a pair of plasticizers, which requires their recovery.

Task to be solved by the claimed invention is directed, is getting duplicated coil binding material paper-based polyamide coating with a thickness of 10 to 50 μm.

The technical result is achieved by the fact that during the implementation of the decision of the polymer or polymer composition, application of polymer melt onto the paper with subsequent duplication and embossed Volkov equipment, as polymer is used copolyamide the characteristic viscosity at 35oC = [0,6-1,3] DL/g and is characterized by only one endothermic peak pri-230oC or melt polymer composition comprising the above copolyamide and functional additives in the ratio of 100 : (0,03-5), respectively, and the melting is carried out in the extruder at a temperature of head 180-245oC and the distance from head to paper, equal 6-90 cm, duplication melt paper is carried out at a temperature of backup rolls 15-60oC and the pressure 3-170 kg/cm2.

Direct application of the melt copolyamid or copolyamid composition allows not only to reduce the consumption of scarce foaming agent, but also reduces the number of technological operations, improves the environment, i.e. in the production of material, no harmful substances, allows to obtain materials with thickness of polymer coating 10-50 μm. This coating provides functional requirements for bookbinding material (high resistance to abrasion, Ocenia binding material in comparison with the known methods of reducing energy consumption, improves performance.

As the main component in the present invention used:

polyamide 6/66-4, synthesized on the basis of salts of AG (salt of adipic acid and a diamine and caprolactam in the ratio of SG Sol : caprolactam = 40 : 60; OST 6-03-438-88,

polyamide 6/66/610, synthesized on the basis of salts of AG (salt sabatinovka acid and diamine), salts of AG and caprolactam in the ratio of salt hypertension : salt CR : caprolactam = 37 : 19 : 44; OST 6-03-438-88,

glycerin GOST 6259-75,

epoxide - monoglyceride esters of polyethylene glycol with a molecular weight of 350-700, THE 6-55-221-979-90; THE 6-55-1082-89 NGOs "Polymersintez" , Vladimir,

deafen H-H-di-naphthyl-p-phenylenediamine (JSC "Khimprom", , Zavolzhsk, Ivanovo oblast),

tinuvin P - derived benzotriazole (NAIMPALLY, , Tambov).

New stabilizer - dual chelate desolate connection Cu-Ca-dimethylformamide was obtained according to the method described in applications EN 94062409 AI, 20.06.96 and EN 94032410 AI 10.07.96., 0.67 mol CaCl2(GOST 4465-87), of 0.65 mol CuCl2H2O suspended in 800 ml of dimethylformamide. The mixture was heated at 70oC for 2 h in a water bath. The resulting solution was yellow or orange were placed in a DVD player>

To implement the claimed invention used polyamide certain molecular weight, which is indirectly assessed by the characteristic solution viscosity of the polyamide in m-cresol. Beyond a given characteristic viscosity is not possible to achieve a positive result.

The criterion of thermal stability of polymers is the melting temperature, the temperature of maximum degradation rate, mass loss (see Wagner, O. I., Freiman Y. C. Study the kinetics of thermal decomposition of polymeric materials by gravimetric analysis// Engineering physical journal. - 1984,, 40, N 2, -c.278).

Processing and exploitation of polymers followed by their destruction, leading, in particular, to changes in the molecular mass distribution.

To characterize the molecular mass distribution of the polyamide was adopted indirect method for determining the interval of melting of the polymer. The wider the range of the melting point, the wider the molecular weight distribution. The melting interval of the selected polyamide 150-230oC.

The table below shows the polymer coating formulation and physico-mechanical parameters obtained oak the face) was performed in the extruder at a temperature of slotted heads 1932oC, duplicating paper was carried out at a temperature mounting rolls 303oC, a pressure of 15 kg/cm2and the distance between the head of the extruder and mounting rollers 30 cm

Melting of the polymer from example 2 were carried out in the extruder at a temperature slotted head 2432oC, duplicating paper was carried out at a temperature mounting rolls 60 3oC, a pressure of 45 kg/cm2and the distance between the head of the extruder and mounting rollers 30 cm

Technological difficulties in obtaining material for the above modes was observed.

Example 6.

Melting composition composition specified in the table (example 6) was carried out at 932oC, duplicating paper was carried out at a temperature mounting rolls 302oC, a pressure of 170 kg/cm2and the distance between the head of the extruder and mounting rollers 90 cm

Example 7.

The melting of the polymer composition according to example 7 were carried out in the extruder at a temperature slotted head 1822oC, duplicating paper was carried out at a temperature mounting rollers 172oC, a pressure of 3 kg/cm and the distance between the head of the extruder and mounting walkability), conducted in 1932oC, duplication of polymer melt paper was carried out at 65oC, a pressure of 10 kg/cm2and the distance between the head of the extruder and the backup rollers 30 cm

When duplication was observed sticking of the polymer to the backup rolls and the striping of the coating from the paper. Physico-mechanical properties were not determined.

Example 16.

Melting composition composition specified in the table in example 5 (see table), was carried out as in example 15. Duplication of polymer coating was carried out at a temperature mounting rolls 302oC, a pressure of 2 kg/cm2and the distance between the head of the extruder and the backup rollers 30 cm

When the above-mentioned modes of duplication was observed uneven adhesion of polymer coatings to paper, peeling of the coating in some places from the paper. Physico-mechanical parameters of the material was not determined.

Example 17.

Melting composition composition specified in the table, example 5 was carried out at 1932oC, duplication of polymer coating was carried out at the temperature of the rolls 302oC, a pressure of 100 kg/cm2and the distance between the head of the extruder and mounting rollers 95 see

Example 18.

Melting composition composition specified in the table, example 5 was carried out at 1932oC, duplication of polymer coating was carried out at the temperature of the rolls 302oC, a pressure of 30 kg/cm2and the distance between the head of the extruder and mounting rollers 5 see

When the above modes were observed uneven thickness of the coating. Physico-mechanical parameters of the material was not determined.

Example 19.

Melting composition composition specified in the table, example 5 was carried out at 2502oC. When the processing at the above temperature was observed allocation of bubbles and discontinuity polymer coating on the paper.

Physico-mechanical properties of composite material was not determined.

Example 20.

The melting of the polymer composition according to example 5 were carried out in the extruder at a temperature of slotted heads 1932oC, duplicating paper was carried out at a temperature mounting rolls 302oC, a pressure of 175 kg/cm2and the distance between the head of the extruder and dulmage and non-uniform coating thickness across the width of the material.

Use in polymer compositions for coating new stabilizer CuCa-DS (examples 6, 10, table) significantly increase the resistance of the film to heat and light aging compared to polymer films, made on the basis of polymer compositions with additives commercially available stabilizers (examples 3, 4, 5, 11, 12, 13, 14).

This way, the inventive method is implemented only under strict limitations on technological parameters (temperature, melting temperature of the backup roll, the pressure of the backup rolls, the distance between the head of the extruder and mounting rollers), and the type of polymer or polymer composition. When going beyond the proposed limits are observed or a significant reduction in the quality of the material, or technological difficulties in obtaining duplicate material.

1. A method of obtaining a duplicate roll of binding material on a paper substrate with a polymeric coating, comprising melting a polymer or polymer composition, application of a polymer melt on paper and subsequent duplication and the embossed roller equipment, characterized in that as a five-only one endothermic peak at T = 150-230oC or polymer composition comprising the above copolyamide and functional additives in the ratio of 100:(0,03-5) wt.h. accordingly, the melting of the polymer or polymer composition is carried out in the extruder at a temperature of head 180-245oC, the distance from head to paper equals 6-90 cm, duplication melt with paper occurs when the temperature of the backup roll 15-60oC and the pressure 3-170 kg/cm2.

2. The method according to p. 1, characterized in that as copolyamid apply copolymer, synthesized on the basis of E-caprolactam and salt sebacinales and adipic acid and a diamine.

3. The method according to p. 1, wherein the functional additives are used chelate desolate connection Cu-Ca-dimethylformamide and glycerin or monoglycidyl ether of polyethylene glycol (mol. m 350-700 at a ratio of 1:(1-10) in an amount of 0.03 to 5 wt.h. on 100 wt.h. copolyamid.

 

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