CN113152144B

CN113152144B - Production process of permanent antistatic synthetic paper additive

Info

Publication number: CN113152144B
Application number: CN202110425471.7A
Authority: CN
Inventors: 王利鹏; 殷雪皇; 程任君
Original assignee: Jiangxi Heshuofeng New Material Co ltd
Current assignee: Jiangxi Heshuofeng New Material Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2022-01-14
Anticipated expiration: 2041-04-20
Also published as: CN113152144A

Abstract

The invention belongs to the technical field of antistatic additives, and particularly relates to a production process of a permanent antistatic synthetic paper additive, which comprises the following steps: s1: dissolving lithium carbonate into deionized water to form a saturated solution; s2: on the basis of the step S1, the promoter is put into the lithium carbonate solution to be soaked, and the solution is heated to be dried; s3: on the basis of the step S2, putting the promoter, the polypropylene and the thermoplastic polyurethane elastomer into a mixing roll, and mixing to obtain a semi-finished product; s4: on the basis of the step S3, putting the semi-finished product into a double-screw extruder for extrusion, and feeding the extruded product into a plastic granulator to obtain a finished granular additive; the antistatic additive prepared by the invention has good antistatic effect, can improve the performance of products to a certain extent after being used, is convenient to use and is easy to disperse in raw materials of the products.

Description

Production process of permanent antistatic synthetic paper additive

Technical Field

The invention belongs to the technical field of antistatic additives, and particularly relates to a production process of a permanent antistatic synthetic paper additive.

Background

Synthetic paper, also known as chemical film paper, plastic paper, polymer paper, paper-like film, pearly paper, etc., is a new type of paper similar to common plant fiber paper in appearance and superior in performance, which is made of high molecular compound, such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, as main raw material instead of plant fiber. Meanwhile, since the main component of the synthetic paper is insulating plastic, the charges generated on the surface of the plastic are accumulated without leakage during the use process, and then the charges accumulated on the surface cause the phenomena of dust adhesion, repulsion, electric shock, discharge and the like, which affect the normal use of the synthetic paper. At present, antistatic additives are generally added in the production process of synthetic paper, so that the antistatic performance of the synthetic paper is improved, and the influence of static electricity on the use of the synthetic paper is reduced. However, common antistatic additives have no other effects, and meanwhile, the powdery additives are easy to agglomerate in the adding process or the mixing time needs to be prolonged after the additives are added, so that the additives are uniformly mixed, the production speed is reduced, and the production cost is increased.

Some technical schemes related to antistatic additives also exist in the prior art, for example, a Chinese patent with the application number of CN201010550482.X discloses an antibacterial anti-aging antistatic plastic master batch and a preparation method thereof, wherein the master batch comprises the following components in parts by weight: 100 parts of polyethylene, 25-40 parts of an antibacterial agent, 1-3 parts of a dispersing agent, 0-1 part of a lubricating agent, 8-14 parts of an antioxidant, 5-10 parts of a light stabilizer, 40-60 parts of an antistatic agent, 0.3-0.6 part of a coupling agent, 0-20 parts of metal particles and 50-80 parts of a composite inorganic flame retardant; however, the antistatic plastic master batch has higher preparation cost and low cost performance, and in addition, the color of the master batch is easily influenced by raw materials used in the preparation process, so that the prepared master batch cannot be applied to the preparation of synthetic paper.

Disclosure of Invention

In order to make up the defects of the prior art, improve the antistatic effect of the antistatic additive, reduce the difficulty of uniformly mixing the additive into a product and avoid agglomeration in the use process of the additive, the invention provides a production process of a permanent antistatic synthetic paper additive.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a production process of a permanent antistatic synthetic paper additive, which comprises the following components: 40 wt% of polypropylene, 40 wt% of thermoplastic polyurethane elastomer, 2-3 wt% of lithium carbonate and 17-18 wt% of promoter; the promoting body is cotton fiber for degreasing and decoloring; the production process comprises the following steps:

s1: dissolving lithium carbonate into deionized water to form a saturated solution;

s2: on the basis of the step S1, the promoter is put into the lithium carbonate solution to be soaked, and the solution is heated to be dried;

s3: on the basis of the step S2, putting the promoter, the polypropylene and the thermoplastic polyurethane elastomer into a mixing roll, and mixing to obtain a semi-finished product;

s4: on the basis of the step S3, putting the semi-finished product into a double-screw extruder for extrusion, and feeding the extruded product into a plastic granulator to obtain a finished granular additive;

during operation, the lithium carbonate is added into the polypropylene and thermoplastic polyurethane elastomer, and the prepared additive has good antistatic effect through the characteristic of low dissociation energy of the lithium carbonate, meanwhile, the lithium carbonate is dissolved into saturated solution and soaked by using the promoter, so that the lithium carbonate is adsorbed and fixed on the promoter, then, the promoter is directly mixed into a mixture of PP and TPU to complete preparation, meanwhile, the distribution uniformity of the lithium carbonate in the prepared additive can be improved to a certain extent through the action of the promoter, the possibility of occurrence of powdery lithium carbonate in the adding process is reduced, the uniform distribution of the lithium carbonate in the prepared additive is ensured, meanwhile, the promoter is uniformly mixed into the additive by using the promoter as a carrier, and the promoters can be mutually staggered in the additive, the strength of the additive is improved, so that after the additive is added into a product in the production process, the additive can be staggered in the product to form a grid result, the properties such as the strength, the toughness and the like of the product are directly improved, the performance of the prepared product is better, such as the strength, the stiffness, the tear strength and the like of the prepared synthetic paper, the number of additional auxiliary materials added in the production process of the synthetic paper is reduced, the production cost is reduced, the production difficulty is reduced, meanwhile, the color of the prepared additive is lighter by using the promoting body as a carrier, the application range of the additive is wider, the phenomenon that the use of the additive is affected due to the too deep color of the additive is avoided, such as the color of the raw material and the additive used in the production process of the synthetic paper cannot be too deep, the influence on the color of the produced synthetic paper is avoided, and the whiteness of the produced synthetic paper is reduced, thereby affecting the use of the synthetic paper.

Preferably, in the step S3, the polypropylene and the thermoplastic polyurethane elastomer are put into a mixer and fully mixed to obtain a mixture; the mixture is calendered by a calender to obtain a rubber plate with the thickness less than 3 mm; the number of the rubber plates is multiple, and any two rubber plates are mutually stacked to obtain a stacked plate; in the stacking process of the stacking plates, the promoting bodies are uniformly distributed between the two rubber plates by using airflow; the stacking plate is folded and extruded repeatedly to obtain a premix; the premix is put into a mixing roll again for mixing to obtain a semi-finished product;

during operation, in the production process, PP and TPU are jointly thrown into a mixing roll for mixing to obtain a mixture, then a calender is used for calendering the mixture to obtain rubber plates, then the rubber plates are mutually stacked and the promoting bodies are uniformly distributed in gaps among the rubber plates by using airflow in the stacking process, then the stacked plates obtained after the rubber plates are stacked are repeatedly folded and extruded to fulfill the aim of preliminarily mixing the promoting bodies into the mixture, the problem that the promoting bodies are agglomerated in the mixing process due to the fact that the promoting bodies are added at one time and directly in the mixing and stirring processes is avoided, the uniform distribution of the promoting bodies in the mixture is influenced, meanwhile, in the use process, the promoting bodies are uniformly distributed in the gaps among the stacked rubber plates by the airflow, the distribution state of the promoting bodies can be visually observed when the promoting bodies are distributed, when the promoting bodies are not uniformly distributed in partial areas of the rubber plate, the promoting bodies can be timely adjusted, the uniform distribution of the promoting bodies in the semi-finished products obtained by preparation is ensured, the situation that the promoting bodies are directly put into a mixing mill to be mixed with PP and TPU is avoided, when the added promoting bodies are agglomerated and are not uniformly distributed, workers cannot timely find and perform targeted adjustment is avoided, meanwhile, the promoting bodies are directly put into the mixing mill to be mixed, the mixing time is necessarily increased, the uniform distribution degree of the promoting bodies in a mixture formed by mixing PP and TPU is improved, the energy consumption in the production process is increased to a certain extent, and the production cost is increased.

Preferably, the promoter is cut after being taken out from the lithium carbonate solution and dried; the length of the short cut promoting body is 0.1-0.15 mm;

during operation, when the promoter is immersed in a lithium carbonate solution, the length of the promoter is long, so that the operation of workers is facilitated, the problem that the promoter is short cut before being immersed in the lithium carbonate solution to cause the short-cut promoter not to be easily and completely immersed in the lithium carbonate solution is avoided, part of the short-cut promoter floats on the surface of the solution, and meanwhile, when the promoter with the long length is immersed in the lithium carbonate solution, all the promoters can be easily immersed in the solution to avoid the short-cut promoter being immersed in the solution, so that the problems that the promoter is difficult to disperse and the short-cut promoter floats under the action of air flow to cause raw material loss and environmental pollution are easily caused; meanwhile, after soaking, the promoting bodies are chopped, the promoting bodies after being chopped can be conveniently distributed by using air flow, meanwhile, the promoting bodies with shorter lengths after being chopped can be easily dispersed into a mixture in the mixing process, so that the promoting bodies in the prepared semi-finished product are uniformly distributed, the agglomeration phenomenon which easily occurs when the promoting bodies with longer lengths are used is avoided, meanwhile, the additive is used for producing the synthetic paper, the thickness of the paper is relatively smaller, the promoting bodies are required to be chopped, the quality of the synthetic paper is not influenced by the promoting bodies in the additive after the additive is added into the synthetic paper, the surface smoothness and the smoothness of the synthetic paper are unqualified, and the normal use of the synthetic paper is influenced.

Preferably, after the promoter is taken out of the lithium carbonate solution and dried, and before the promoter is chopped, the promoter is put into the polydimethylsiloxane for soaking for 20-30 min; when the promoter is soaked in the polydimethylsiloxane, ultrasonic waves are used for stirring the polydimethylsiloxane; after the promotion body is soaked in the polydimethylsiloxane oil, the promotion body is placed between the two mesh plates to be extruded;

when the lithium carbonate solution is used, the accelerator is taken out of the lithium carbonate solution and dried, then the accelerator is put into the polydimethylsiloxane for soaking, meanwhile, in the soaking process, the polydimethylsiloxane is stirred by ultrasonic waves, the soaking sufficiency degree of the polydimethylsiloxane on the accelerator is improved, the polydimethylsiloxane is promoted to permeate into the accelerator, so that when the accelerator is added into the mixture, the surface of the accelerator has sufficient polydimethylsiloxane, then, the dispersion effect of the accelerator is further improved by the characteristics of the polydimethylsiloxane, the agglomeration possibility of the accelerator in the mixture is reduced, meanwhile, in the production process, the accelerator before being chopped is immersed into the polydimethylsiloxane, and the problem that the accelerator possibly floats on the liquid surface or scatters when the accelerator after being chopped is immersed can be avoided, meanwhile, the promoting bodies are immersed into the polydimethylsiloxane oil and taken out, then the promoting bodies are chopped, the polydimethylsiloxane oil adhering to the surfaces of the promoting bodies can ensure that the promoting bodies cannot scatter in the chopping process, environmental pollution is avoided, the health of workers is prevented from being affected, meanwhile, the polydimethylsiloxane oil exists on the surfaces of the promoting bodies, the promoting bodies with short lengths after being chopped can be gathered, the promoting bodies are prevented from being too dispersed after being chopped, and the collecting, the storing and the using are not convenient.

Preferably, the promoter is subjected to a sanding treatment before being immersed in the polydimethylsiloxane oil;

the during operation, after carrying out the sanding to the promotion body, again will promote the body and dip in the polydimethyl silicone oil, can improve the area of contact between polydimethyl silicone oil and the promotion body, increase the degree of depth and the quantity that the polydimethyl silicone oil infiltrates in the promotion body, thereby make the promotion body change the effect that receives polydimethyl silicone oil at mixing in-process, the dispersion is more even, simultaneously, in the use, the promotion body is through the sanding after handling, there is fine hair on the surface, can increase the cohesion between the promotion body and other materials, improve the performance of the product that the production obtained, make the quality of product better.

Preferably, after the promoter is sanded, the promoter is carbonized before being immersed in the polydimethylsiloxane; when the promoter is carbonized, the treatment temperature is 450-500 ℃, and the treatment time is 10-15 min; when the promoting body is carbonized, the promoting body is in a vacuum environment;

when in work, the promoting body is carbonized, the carbonization temperature is controlled to avoid the lithium carbonate existing in the promoting body from being decomposed at high temperature, meanwhile, the surface of the promoter is partially carbonized through carbonizing the promoter, so that the conductivity of the promoter is improved, and the phenomenon that after an additive is added into a product is avoided, lithium carbonate exists in the accelerator body completely, the distribution in the product is insufficient, the antistatic performance of the product is influenced, and simultaneously, the partial carbonization of the accelerator can avoid the complete carbonization of the accelerator to change the accelerator into carbon fiber, which leads to the complete color change of the accelerator into black, thereby affecting the whole color of the additive and leading the color of the additive to be close to black or directly become black, and after the additive is added in the production process of the synthetic paper, affecting the color of the resultant synthetic paper produced, resulting in poor appearance of the resultant synthetic paper.

The invention has the following beneficial effects:

1. according to the production process of the permanent antistatic synthetic paper additive, lithium carbonate is prepared into a saturated solution, a promoter is used for absorbing, the promoter is chopped and mixed into a mixture of PP and TPU, the uniform dispersion of lithium carbonate in the mixture is promoted under the action of a carrier of the promoter, the problems of uneven distribution and agglomeration easily caused by directly adding lithium carbonate powder are solved, meanwhile, after the mixture is rolled to form rubber plates, the promoter is distributed in gaps among the rubber plates, then, the rubber plates are repeatedly folded and extruded, the promoter can be mixed in advance to obtain a premix, the time for putting the premix into a mixing mill for mixing is shortened, the production speed is accelerated, and the uniform distribution degree of the promoter in a semi-finished product is improved.

2. According to the production process of the permanent antistatic synthetic paper additive, the number of the polydimethylsiloxane oil attached to the promoter can be increased by sanding the promoter and then immersing the promoter into the polydimethylsiloxane oil, so that the effect of the polydimethylsiloxane oil in the mixing process of the promoter and a mixture is improved, the dispersion effect of the promoter is improved, meanwhile, the strength of a product using the additive can be improved by sanding the surface of the promoter, the performance of the product is improved, meanwhile, a carbonized layer can be formed on the surface of the promoter by carbonizing the promoter in the using process, the conductivity of the promoter is improved, and the antistatic performance of the product using the additive is improved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a partial sectional view of the construction of the present invention after the sheets are stacked and before the sheets are folded;

FIG. 2 is a flow chart of the steps of the production process of the present invention;

in the figure: a rubber plate 1 and a promoter 2.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 and 2, the production process of the permanent antistatic synthetic paper additive of the invention comprises the following components: 40 wt% of polypropylene, 40 wt% of thermoplastic polyurethane elastomer, 2-3 wt% of lithium carbonate and 17-18 wt% of promoter 2; the promoter 2 is absorbent and decolored cotton fiber; the production process comprises the following steps:

s2: on the basis of the step S1, the promoter 2 is put into a lithium carbonate solution to be soaked, and the solution is heated to be dried;

s3: on the basis of the step S2, putting the promoter 2, polypropylene and thermoplastic polyurethane elastomer into a mixing roll, and mixing to obtain a semi-finished product;

during operation, the lithium carbonate is added into the polypropylene and thermoplastic polyurethane elastomer, and the prepared additive has good antistatic effect through the characteristic of low dissociation energy of the lithium carbonate, meanwhile, the lithium carbonate is dissolved into saturated solution and soaked by using the promoter 2, so that the lithium carbonate is adsorbed and fixed on the promoter 2, then, the promoter 2 is directly mixed into a mixture of PP and TPU, the preparation is completed, meanwhile, the distribution uniformity of the lithium carbonate in the prepared additive can be improved to a certain extent through the action of the promoter 2, the possibility of agglomeration of powdery lithium carbonate in the adding process is reduced, the uniform distribution of the lithium carbonate in the prepared additive is ensured, meanwhile, the promoter 2 is used as a carrier, the lithium carbonate is uniformly mixed into the additive, and the promoters 2 can be mutually staggered in the additive, the strength of the additive is improved, so that after the additive is added into a product in the production process, the additive can be staggered in the product to form a grid result, the properties such as the strength, the toughness and the like of the product are directly improved, the performance of the prepared product is better, such as the strength, the stiffness, the tear strength and the like of the prepared synthetic paper, the number of additional auxiliary materials added in the production process of the synthetic paper is reduced, the production cost is reduced, the production difficulty is reduced, meanwhile, the promoter 2 is used as a carrier, the color of the prepared additive is lighter, the application range of the additive is wider, the phenomenon that the additive is used due to too dark color of the additive is avoided, such as the raw materials and the additive used in the production process of the synthetic paper cannot be too dark color, the influence on the color of the produced synthetic paper is avoided, and the whiteness of the produced synthetic paper is reduced, thereby affecting the use of the synthetic paper.

In an embodiment of the present invention, in the step S3, the polypropylene and the thermoplastic polyurethane elastomer are put into a mixer and sufficiently mixed to obtain a mixture; the mixture is calendered by a calender to obtain a rubber plate 1 with the thickness less than 3 mm; the number of the rubber plates 1 is multiple, and any two rubber plates 1 are stacked mutually to obtain a stacked plate; in the stacking process of the stacking plate, the promoting bodies 2 are uniformly distributed between the two rubber plates 1 by using air flow; the stacking plate is folded and extruded repeatedly to obtain a premix; the premix is put into a mixing roll again for mixing to obtain a semi-finished product;

during operation, in the production process, PP and TPU are jointly put into a mixing roll for mixing to obtain a mixture, then the mixture is calendered by a calender to obtain rubber plates 1, then the rubber plates 1 are mutually stacked and the promoting bodies 2 are uniformly distributed in gaps among the rubber plates 1 by using airflow in the stacking process, then the stacked plates obtained after the rubber plates 1 are stacked are repeatedly folded and extruded to fulfill the aim of primarily mixing the promoting bodies 2 into the mixture, the problem that the promoting bodies 2 are agglomerated in the mixing process due to the fact that the promoting bodies 2 are added at one time and directly in the mixing and stirring processes is avoided, the uniform distribution of the promoting bodies 2 in the mixture is influenced, meanwhile, in the use process, the promoting bodies 2 are uniformly distributed in the gaps among the stacked rubber plates 1 by the airflow, the distribution state of the promoting bodies 2 can be visually observed when the promoting bodies 2 are distributed, when the promoting bodies 2 are not uniformly distributed in partial areas of the rubber plate 1, the promoting bodies 2 can be timely adjusted to ensure uniform distribution of the promoting bodies 2 in the semi-finished products obtained by preparation, so that the situation that the promoting bodies 2 are directly put into a mixing roll to be mixed with PP and TPU is avoided, when the added promoting bodies 2 are agglomerated and are not uniformly distributed, workers cannot timely find and pertinently adjust the promoting bodies 2, meanwhile, the promoting bodies 2 are directly put into the mixing roll to be mixed, mixing time is necessarily increased, the uniform distribution degree of the promoting bodies 2 in a mixed body formed by mixing PP and TPU is improved, energy consumption in the production process is increased to a certain extent, and production cost is increased.

In one embodiment of the present invention, the promoters 2 are cut after being taken out from the lithium carbonate solution and dried; the length of the promoting body 2 after being chopped is 0.1-0.15 mm;

during operation, when the promoting body 2 is immersed in the lithium carbonate solution, the promoting body 2 is long, so that the operation of workers is facilitated, the situation that the promoting body 2 is short cut before being immersed in the lithium carbonate solution to cause that the short promoting body 2 is not easy to be completely immersed in the lithium carbonate solution and part of the short promoting body 2 floats on the surface of the solution is avoided, meanwhile, when the promoting body 2 with a long length is immersed in the lithium carbonate solution, all the promoting bodies 2 can be easily immersed in the solution, the situation that the short promoting body 2 is immersed in the solution is avoided, the problems that the promoting body 2 is difficult to disperse and the short promoting body 2 flies under the action of air flow to cause raw material loss and environmental pollution are easily caused; meanwhile, after soaking, the promoting bodies 2 are chopped, so that the promoting bodies 2 after being chopped can be conveniently distributed by using air flow, meanwhile, the promoting bodies 2 with short lengths after being chopped can be easily dispersed into a mixture in the mixing process, so that the promoting bodies 2 in the prepared semi-finished product are uniformly distributed, the agglomeration phenomenon that the promoting bodies 2 with long lengths are easy to generate is avoided, meanwhile, the additive is used for producing the synthetic paper, and the thickness of the paper is relatively small, so that the promoting bodies 2 need to be chopped, the quality of the synthetic paper is not influenced by the promoting bodies 2 in the additive after the additive is added into the synthetic paper, the surface smoothness and the smoothness of the synthetic paper are unqualified, and the normal use of the synthetic paper is influenced.

In one embodiment of the present invention, after the promoter 2 is taken out of the lithium carbonate solution and dried, the promoter 2 is put into the polydimethylsiloxane oil for soaking for 20 to 30min before being chopped; when the promoter 2 is soaked in the polydimethylsiloxane, ultrasonic waves are used for stirring the polydimethylsiloxane; after the promotion body 2 is soaked in the polydimethylsiloxane oil, the promotion body 2 is placed between two mesh plates to be extruded;

in operation, after the promoter 2 is taken out of the lithium carbonate solution and dried, the promoter 2 is put into the polydimethylsiloxane for soaking, meanwhile, in the soaking process, the polydimethylsiloxane is stirred by using ultrasonic waves, the soaking sufficiency degree of the polydimethylsiloxane to the promoter 2 is improved, the polydimethylsiloxane is promoted to permeate into the promoter 2, so that when the promoter 2 is added into the mixture, the sufficient polydimethylsiloxane exists on the surface of the promoter 2, then, the dispersion effect of the promoter 2 is further improved by the characteristics of the polydimethylsiloxane, the possibility of agglomeration of the promoter 2 in the mixture is reduced, and meanwhile, in the production process, the promoter 2 before being chopped is immersed into the polydimethylsiloxane, the possible problem that the promoter 2 floats on the liquid surface or the promoter 2 scatters when the promoter 2 after being chopped is immersed can be avoided, meanwhile, after the promoting body 2 is immersed into the polydimethylsiloxane oil and taken out, the promoting body 2 is chopped, the polydimethylsiloxane oil adhered to the surface of the promoting body 2 can ensure that the promoting body 2 cannot scatter in the chopping process, the environmental pollution is avoided, and the health of workers is influenced, meanwhile, the polydimethylsiloxane oil is arranged on the surface of the promoting body 2, so that the promoting bodies 2 with short lengths after being chopped can be mutually gathered, the promoting bodies 2 are prevented from being excessively dispersed after being chopped, and the collecting, the storing and the using are inconvenient.

In one embodiment of the present invention, the promoter 2 is subjected to a sanding treatment before being immersed in the polydimethylsiloxane oil;

the during operation, after carrying out the sanding to the promotion body 2 and handling, will promote body 2 again and dip in the polydimethyl silicone oil, can improve the contact area between the polydimethyl silicone oil and the promotion body 2, increase the degree of depth and the quantity that the polydimethyl silicone oil infiltrates in the promotion body 2, thereby make the promotion body 2 change in mixing in-process and receive the effect of polydimethyl silicone oil, the dispersion is more even, and simultaneously, in the use, promote body 2 and handle the back through the sanding, there is fine hair on the surface, can increase the cohesion between the promotion body 2 and other materials, improve the performance of the product that the production obtained, make the quality of product better.

In one embodiment of the present invention, the accelerator 2 is carbonized after being sanded and before being immersed in the polydimethylsiloxane; when the promoter 2 is carbonized, the treatment temperature is 450-500 ℃, and the treatment time is 10-15 min; when the promoting body 2 is carbonized, the promoting body 2 is in a vacuum environment;

during operation, the promoting body 2 is carbonized, the carbonization temperature is controlled, lithium carbonate existing in the promoting body 2 is prevented from being subjected to pyrolysis, meanwhile, the surface of the promoting body 2 is partially carbonized through the carbonization of the promoting body 2, the conductivity of the promoting body 2 is improved, after additives are added into products, lithium carbonate is completely stored in the promoting body 2 and is insufficiently distributed in the products, the antistatic performance of the products is influenced, meanwhile, the promoting body 2 is partially carbonized, the promoting body 2 can be prevented from being completely carbonized, the promoting body 2 is changed into carbon fibers, the color of the promoting body 2 is completely changed into black, the overall color of the additives is further influenced, the color of the additives is close to black or is directly changed into black, the color of synthetic paper obtained through production is influenced after the additives are added into the synthetic paper production process, resulting in poor appearance of the resulting synthetic paper.

The specific working process is as follows:

during working, lithium carbonate is added into polypropylene (PP) and thermoplastic polyurethane elastomer (TPU), the prepared additive has good antistatic effect through the characteristic of low dissociation energy of lithium carbonate, meanwhile, the lithium carbonate is dissolved into saturated solution and soaked by using the promoter 2, so that the lithium carbonate is adsorbed and fixed on the promoter 2, and then the promoter 2 is directly mixed into a mixture of PP and TPU to finish preparation; putting PP and TPU into a mixing roll together for mixing to obtain a mixture, then calendering the mixture by using a calender to obtain rubber plates 1, then mutually stacking the rubber plates 1, uniformly spreading a promoting body 2 in the stacking process to gaps among the rubber plates 1 by using air flow, and then repeatedly folding and extruding the stacked plates obtained after the rubber plates 1 are stacked; when the promoter 2 is immersed in the lithium carbonate solution, the length of the promoter 2 is long; meanwhile, after soaking, the promoting bodies 2 are chopped, so that the chopped promoting bodies 2 are convenient to spread by using air flow; after the promoter 2 is taken out of the lithium carbonate solution and dried, the promoter 2 is put into the polydimethylsiloxane for soaking, and meanwhile, the polydimethylsiloxane is stirred by ultrasonic waves in the soaking process; after the promoting body 2 is subjected to sanding treatment, the promoting body 2 is immersed into the polydimethylsiloxane oil; the catalyst 2 is carbonized at a controlled temperature to prevent lithium carbonate present in the catalyst 2 from being decomposed at high temperature, and the catalyst 2 is carbonized at a partially carbonized surface to improve the conductivity of the catalyst 2.

In order to verify the actual performance of the antistatic additives prepared according to the present invention, experiments were performed on the antistatic additives of the present invention.

After that, synthetic paper was prepared using the commercially available ordinary antistatic additive (sample one), the antistatic additive prepared according to the present invention (sample two), the antistatic agent prepared according to the present invention (sample three) (no promoter was added), the antistatic additive prepared according to the present invention (sample four) (no roughening treatment was performed on the promoter), and the antistatic additive prepared according to the present invention (sample five) (carbonization treatment was performed on the promoter), and then the synthetic paper was prepared using the above-mentioned raw materials according to the same process method, and the tensile strength (longitudinal direction), tear strength (longitudinal/lateral direction), stiffness (longitudinal/lateral direction), and surface resistance of the synthetic paper obtained was measured, and the experimental results were recorded in table 1; the experiment was performed three times and the average of the results of the three experiments was recorded in the table.

TABLE 1

The experimental results are as follows: compared with the common antistatic additive, the antistatic additive prepared by the invention has obvious advantages, and simultaneously, the antistatic additive prepared by the production method of the invention has the best performance, and the antistatic additive prepared by the production method of the invention has better performance compared with the common antistatic additive.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A production process of a permanent antistatic synthetic paper additive is characterized by comprising the following steps: the additive comprises the following components: 40 wt% of polypropylene, 40 wt% of thermoplastic polyurethane elastomer, 2-3 wt% of lithium carbonate and 17-18 wt% of promoter (2); the promoting body (2) is degreased and decolored cotton fiber; the production process comprises the following steps:

s2: on the basis of the step S1, the promoter (2) is put into a lithium carbonate solution to be soaked, and the solution is heated to be dried;

s3: on the basis of the step S2, adding the promoter (2), polypropylene and a thermoplastic polyurethane elastomer into a mixing roll, and mixing to obtain a semi-finished product;

in the step S3, firstly, the polypropylene and the thermoplastic polyurethane elastomer are put into a mixing roll to be fully mixed to obtain a mixture; the mixture is calendered by a calender to obtain a rubber plate (1) with the thickness less than 3 mm; the number of the rubber plates (1) is multiple, and any two rubber plates (1) are stacked mutually to obtain a stacked plate; in the stacking process of the stacking plate, the promoting bodies (2) are uniformly distributed between the two rubber plates (1) by using air flow; the stacking plate is folded and extruded repeatedly to obtain a premix; and adding the premix into the mixing roll again, and mixing to obtain a semi-finished product.

2. The process for producing a permanent antistatic synthetic paper additive according to claim 1, wherein: the promoter (2) is taken out from the lithium carbonate solution and dried, and then the promoter (2) is chopped; the length of the promoting body (2) after being chopped is 0.1-0.15 mm.

3. The process for producing a permanent antistatic synthetic paper additive according to claim 2, wherein: after the promoter (2) is taken out of the lithium carbonate solution and dried, and before chopping, the promoter (2) is put into the polydimethylsiloxane for soaking for 20-30 min; when the promotion body (2) is soaked in the polydimethylsiloxane, ultrasonic waves are used for stirring the polydimethylsiloxane; and after the promoting body (2) is soaked in the polydimethylsiloxane oil, the promoting body (2) is placed between the two mesh plates for extrusion.

4. The process for producing a permanent antistatic synthetic paper additive according to claim 3, wherein: the accelerator (2) is subjected to a sanding treatment before being immersed in the polydimethylsiloxane oil.

5. The process for producing a permanent antistatic synthetic paper additive according to claim 4, wherein: after the promoting body (2) is sanded, before the promoting body is immersed into the polydimethylsiloxane oil, carbonizing the promoting body (2); when the promoter (2) is carbonized, the treatment temperature is 450-500 ℃, and the treatment time is 10-15 min; when the accelerator (2) is carbonized, the accelerator (2) is in a vacuum environment.