CN111978501A - Processing technology of thermoplastic polyurethane elastomer - Google Patents

Processing technology of thermoplastic polyurethane elastomer Download PDF

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Publication number
CN111978501A
CN111978501A CN202010835727.7A CN202010835727A CN111978501A CN 111978501 A CN111978501 A CN 111978501A CN 202010835727 A CN202010835727 A CN 202010835727A CN 111978501 A CN111978501 A CN 111978501A
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reaction
stirring
cylinder
raw materials
shaft
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王乐
李洋
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/08—Processes
    • C08G18/088—Removal of water or carbon dioxide from the reaction mixture or reaction components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/0053—Details of the reactor
    • B01J19/0066—Stirrers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/18—Stationary reactors having moving elements inside
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/30—Low-molecular-weight compounds
    • C08G18/32—Polyhydroxy compounds; Polyamines; Hydroxyamines
    • C08G18/3203—Polyhydroxy compounds
    • C08G18/3206—Polyhydroxy compounds aliphatic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
    • C08G18/4236—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups
    • C08G18/4238—Polycondensates having carboxylic or carbonic ester groups in the main chain containing only aliphatic groups derived from dicarboxylic acids and dialcohols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/65—Low-molecular-weight compounds having active hydrogen with high-molecular-weight compounds having active hydrogen
    • C08G18/66—Compounds of groups C08G18/42, C08G18/48, or C08G18/52
    • C08G18/6633—Compounds of group C08G18/42
    • C08G18/6637—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38
    • C08G18/664—Compounds of group C08G18/42 with compounds of group C08G18/32 or polyamines of C08G18/38 with compounds of group C08G18/3203
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/72—Polyisocyanates or polyisothiocyanates
    • C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
    • C08G18/76—Polyisocyanates or polyisothiocyanates cyclic aromatic
    • C08G18/7657—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings
    • C08G18/7664—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups
    • C08G18/7671—Polyisocyanates or polyisothiocyanates cyclic aromatic containing two or more aromatic rings containing alkylene polyphenyl groups containing only one alkylene bisphenyl group

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention belongs to the technical field of polymer preparation, and particularly relates to a processing technology of a thermoplastic polyurethane elastomer, wherein S1: respectively melting polyethylene glycol adipate, diphenylmethane diisocyanate and butanediol, adding into a drying device, and dehydrating and drying; s2: adding the dried reaction raw material mixture into a reaction cylinder, heating and stirring at a high speed; s3: injecting the reaction raw materials after the preliminary mixing into a double-screw reaction extruder for molding and pelletizing to obtain product particles; s4: heating, dehydrating and stirring the product particles, and then screening the product particles in a grading manner to obtain a thermoplastic polyurethane elastomer; carry a cavity inside and act on rotating blade with the inside gas of reaction cylinder through a trachea, make rotating blade drive stirring vane and rotate and stir the inside reaction raw materials of reaction cylinder, finally solved the inside atmospheric pressure of reaction cylinder too big and the problem that the reaction raw materials can not obtain the intensive mixing.

Description

Processing technology of thermoplastic polyurethane elastomer
Technical Field
The invention belongs to the technical field of polymer preparation, and particularly relates to a processing technology of a thermoplastic polyurethane elastomer.
Background
Polyurethane elastomers are elastomeric polymers that contain more oil-rich urethane-based functional groups (NH-CO-O-) in the backbone of the macromolecule, and are typically multi-block copolymers. The high-strength wear-resistant steel plate has the advantages of good wear resistance, wide hardness range, high strength, high elongation, large load supporting capacity, good shock absorption effect, good low-temperature resistance, excellent oil resistance and weather resistance and the like. Compared with rubber materials, the polyurethane elastomer has a series of advantages of wear resistance, tear resistance, ozone resistance, cutting resistance, high bearing capacity, casting, encapsulation, wide hardness range, transparency or translucency and the like; compared with plastics, the polyurethane elastomer has the advantages of difficult embrittlement, wear resistance, elastic memory and the like; compared with metal materials, the polyurethane elastomer has the advantages of wear resistance and corrosion resistance. Light weight, low processing cost, low noise and the like. Therefore, polyurethane elastomers are widely used; polyurethane elastomers can be generally classified into thermoplastic polyurethane elastomers (TPU), cast polyurethane elastomers, and compounded polyurethane elastomers, depending on the processing method. The thermoplastic polyurethane elastomer is a polyurethane elastomer which can be plasticized when heated and can be dissolved by a solvent. Compared to cast and compounded polyurethane elastomers, these have little to no crosslinking structure, are essentially linear in their molecules, and only have a certain amount of physical crosslinking.
However, in the preparation process of the thermoplastic polyurethane elastomer, the gas inside the reaction cylinder is heated to expand, and in addition, the residual moisture in the reaction raw materials is heated to evaporate, so that the normal operation of the reaction is influenced by the overlarge air pressure inside the reaction cylinder; meanwhile, the reaction raw materials are often insufficiently mixed due to uneven stirring in the reaction process, so that the reaction of the reaction raw materials is insufficient, and the technical scheme is limited.
In view of the above, the invention improves the reaction cylinder, conveys redundant gas in the reaction cylinder to the first chamber through the first gas pipe, and the inflowing gas can act on the rotating blade, so that the rotating blade drives the stirring blade to rotate and stir the reaction raw materials in the reaction cylinder, and finally, the problem of overlarge gas pressure in the reaction cylinder is solved, the reaction raw materials are fully mixed and reacted, and the thermoplastic polyurethane elastomer with better quality is obtained.
Disclosure of Invention
The invention provides a processing technology of a thermoplastic polyurethane elastomer, which aims to make up the defects of the prior art and solve the problems that the normal operation of reaction is influenced due to the overlarge air pressure of a reaction cylinder when raw materials are prepared by the existing processing technology of the thermoplastic polyurethane elastomer, and the quality of a finally obtained product is influenced due to the fact that the reaction raw materials are difficult to be fully mixed and reacted.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a processing technology of a thermoplastic polyurethane elastomer, which comprises the following steps:
s1: respectively melting polyethylene glycol adipate, diphenylmethane diisocyanate and butanediol, adding into a drying device, heating and stirring at a low speed, and finally vacuumizing the inside of the drying device to obtain a dry reaction raw material;
s2: adding additives such as a lubricant, an antioxidant, a bismuth-based catalyst and the like into the dehydrated and dried polyethylene glycol adipate, uniformly mixing the materials to obtain a polyethylene glycol adipate premix, adding the dehydrated and dried diphenylmethane diisocyanate and butanediol into the polyethylene glycol adipate premix, adding the mixture into a reaction cylinder, heating and stirring at a high speed to preliminarily mix the raw materials;
s3: injecting the preliminarily mixed reaction raw materials into a double-screw reaction extruder, starting the double-screw reaction extruder and heating a machine barrel, after the reaction is finished, extruding and molding a product obtained by the reaction by an extruding part of the double-screw reaction extruder, and finally, bracing, granulating and drying to obtain product particles;
s4: pouring the obtained product particles into a drying device, heating to about 100 ℃ for drying, simultaneously stirring the product particles in the drying device at a high speed, and finally carrying out classified screening on the dried product to obtain a thermoplastic polyurethane elastomer;
the reaction cylinder adopted in the S2 comprises a cylinder body, a cylinder cover, a heater, a liquid inlet and a liquid outlet, wherein the cylinder cover is installed at the top of the cylinder body, the liquid inlet is arranged at the top of the cylinder cover, the heater is installed on the upper surface of the bottom of the cylinder body, and the liquid outlet is arranged at a position, close to the edge, of the bottom of the cylinder body; first convex blocks are symmetrically arranged on the outer surface of the side wall of the cylinder body, and the surface of each first convex block, which is contacted with the side wall of the cylinder body, is sunken towards the inside of the first convex block and is matched with the outer surface of the side wall of the cylinder body to form a first cavity; the part of the outer surface of the side wall of the cylinder body, which is contacted with each first bump, is provided with a sliding chute, a connecting rod is arranged in each sliding chute, one end of each connecting rod, which is close to the cylinder body, extends into the cylinder body through the sliding chute, and one end of each connecting rod, which is far away from the cylinder body, extends into the first cavity; the end part of each connecting rod extending into the barrel body is provided with a stirring blade, and the end part of each connecting rod extending into the first chamber is provided with a rotating blade; a second lug is arranged at the center of the upper surface of the barrel cover, an air outlet channel is arranged inside the second lug, the bottom end of the air outlet channel is connected with the inside of the reaction barrel, and the top end of the air outlet channel is simultaneously connected with the bottom of a first cavity on the left side of the barrel body and the top of a first cavity on the right side of the barrel body through a first air pipe respectively; when the inside thermal expansion that is heated of reaction cylinder, gaseous cavity that flows in stack shell both sides respectively along a trachea makes the stirring vane of both sides rotate and stir the inside raw materials of reaction cylinder along opposite direction respectively, has not only solved the too big problem of inside atmospheric pressure of reaction cylinder, still makes reaction raw materials mix more evenly, and the reaction is more abundant.
When in use, when the reaction raw materials are added into the reaction cylinder from the liquid inlet, the heater starts to heat; after the raw materials in the reaction cylinder are heated for a period of time, moisture in the raw materials is heated and evaporated, and meanwhile, gas in the reaction cylinder expands due to heating, so that the pressure in the reaction cylinder is increased; the normal operation of the reaction can be influenced by the overlarge air pressure in the reaction cylinder, so that a part of air flows into the first air pipe through the air outlet channel by arranging the air outlet channel, then flows into the first cavity from the first air pipe, and the air flowing into the first cavity can act on the rotating blade to rotate the rotating blade; because the first air pipe is respectively connected with the bottom of the first cavity at the left side of the reaction cylinder and the top of the first cavity at the right side of the reaction cylinder, the rotating blades in the first cavity at the two sides of the reaction cylinder are opposite in gas action direction, so that the rotating directions of the two rotating blades are opposite, and the rotating directions of the stirring blades driven by the rotating blades are also opposite; rotating vane can drive the connecting rod when rotating, and the connecting rod rotates and can drive stirring vane to rotate, and pivoted stirring vane can act on the inside raw materials of reaction cylinder, not only can make the raw materials obtain intensive mixing and reaction like this, makes the unnecessary gas in the reaction cylinder obtain better utilization moreover, prevents that the reaction cylinder is inside to influence the reaction process because of atmospheric pressure is too big.
Preferably, a first shaft is arranged in the center of the bottom of the cylinder body, and the bottom end of the first shaft is rotatably connected with the bottom of the cylinder body; stirring rods are uniformly arranged on the side surface of the first shaft, which is far away from the stirring blades, an arc-shaped plate is arranged on the side surface of the first shaft, which is close to the stirring blades, strip-shaped through holes are uniformly formed in the surface of the arc-shaped plate, and the lower surface of the arc-shaped plate is simultaneously contacted with the end parts of the stirring blades on the two sides of the first shaft; when the stirring blades rotate, the first shaft rotates under the action of the stirring blades, and simultaneously drives the stirring rod to rotate and stir the raw materials in the reaction cylinder, so that the reaction raw materials are mixed more uniformly and react more fully; when the gas stirring device is used, when the rotating blades are acted by gas and drive the stirring blades to rotate through the connecting rods, the stirring blades rotate and act on the arc-shaped plate contacted with the stirring blades, because the rotating directions of the stirring blades on the two sides of the first shaft are opposite, the acting directions of the stirring blades on the parts, positioned on the two sides of the first shaft, of the arc-shaped plate are opposite, and the lower surface, contacted with the stirring blades, of the arc-shaped plate is uniformly provided with the strip-shaped through holes to increase the friction coefficient of the lower surface of the arc-shaped plate, so that the arc-shaped plate can drive the first shaft; a pivoted axle still can drive the puddler that a surface set up and rotate and stir the inside raw materials of reaction cylinder for the inside raw materials of reaction cylinder mix more abundant, improved reaction efficiency.
Preferably, the top end of the first shaft is symmetrically provided with swing blades, and the swing blades are elastically connected with the top end of the first shaft; when the first shaft rotates, the first shaft drives the swing blades to rotate, and the swing blades swing up and down while rotating, so that gas in the reaction cylinder can rise and flow into the first gas pipe; when the stirring device is used, the first shaft rotates under the action of the stirring blades, the rotating first shaft can drive the swinging blades arranged at the top of the first shaft to rotate, and the swinging blades can swing up and down relative to the first shaft because the swinging blades are elastically connected with the top end of the first shaft; therefore, the swing blade rotates under the action of the first shaft, stirs the reaction raw materials and swings up and down under the action of reaction force, so that the reaction raw materials are stirred more uniformly, and the gas in the reaction cylinder can rise more violently by the swing blade swinging up and down; finally, more gas flows into the first gas pipe in the reaction cylinder, so that the internal overhigh gas pressure of the reaction cylinder is further reduced, and the rotating speed of the rotating blades is also improved under the action of stronger gas, so that the stirring blades rotate more intensely, and the raw materials in the reaction cylinder are mixed more sufficiently.
Preferably, the part of the outer surface of the side wall of the cylinder body, which is positioned in the first chamber, is uniformly provided with conical air holes; the small end of each conical air hole is positioned on the inner surface of the cylinder body, and the large end of each conical air hole is positioned on the outer surface of the cylinder body; when the gas in the first chamber is excessive, a part of the gas flows into the reaction cylinder from the conical gas hole, so that the reaction raw materials are mixed more uniformly and the reaction is more complete; when the reaction barrel is used, when too much gas flows into the first cavity through the first gas pipe, the gas pressure in the first cavity is increased, and a part of gas flows into the reaction barrel from the conical gas hole in the side wall of the barrel body in the first cavity; because toper gas pocket tip is at stack shell internal surface, consequently, avoided inside reaction raw materials of reaction cylinder to get into a cavity from the toper gas pocket inside, and toper gas pocket main aspects are at the stack shell surface of a cavity inside, consequently, the inside gas of a cavity can receive toper gas pocket lateral wall effect and pressurized once more when the toper gas pocket gets into, finally get into the great air current of the inside gas formation pressure of stack shell through the toper gas pocket, strike the inside reaction raw materials of reaction cylinder, make reaction raw materials mix more evenly.
Preferably, a reset plate is arranged between the side wall of the first chamber far away from the reaction cylinder and the rotating blade, and the reset plate is connected with the side wall of the first chamber far away from the reaction cylinder through a spring; when the rotating blade moves towards the direction far away from the reaction cylinder due to the action of the stirring blade, the reset plate can act on the rotating blade to reset the rotating blade; when the stirring device is used, the structure of the stirring blades is similar to that of a fan blade, so that the stirring blades on the two sides of the first shaft can act on reaction raw materials at the central positions of the opposite surfaces of the two stirring blades when rotating, and meanwhile, the stirring blades can also receive reaction force, so that each stirring blade moves towards the direction far away from the first shaft; the stirring blade can drive the connecting rod to move in the chute while moving, and the connecting rod can drive the rotating blade to move in the direction far away from the reaction cylinder; rotating blade continues to move and can contact with the board that resets to pressing and moving the board that resets and making the spring take place deformation, as the distance grow between two stirring vane relative surfaces, the reaction force that stirring vane received can reduce, and spring deformation resumes and makes the board that resets press and move stirring vane and get back to original position this moment.
Preferably, a group of pressure relief through holes are uniformly formed in the stirring blade; when the stirring blade is used, the pressure relief through holes formed in the surfaces of the stirring blades can enable a part of reaction raw materials to flow through the through holes, so that the pressure applied to the stirring blades is reduced, and the service life of the stirring blades is prolonged.
Preferably, a groove is formed in the side wall of the air outlet channel, an air plugging plate is embedded in the groove, and the air flow entering the first air pipe in the reaction cylinder can be controlled by controlling the length of the air plugging plate embedded in the groove; during the use, can make the stopper gas board block the export of air outlet channel through embedding the stopper gas board recess, can change the size of air outlet channel export through the length of control stopper gas board embedding recess, and then the inside tracheal gas flow that flows in of control reaction cylinder, finally can influence the stirring process of whole reaction.
Preferably, a fixed rod is arranged on the stirring rod, one end of the fixed rod is fixedly connected with the first shaft, and the other end of the fixed rod is fixedly connected with the lower surface of the stirring rod; during the use, the dead lever that is equipped with on the puddler not only can strengthen the puddler fastness epaxial No. one, and the dead lever also can play the stirring effect when rotating along with the puddler, makes more even that reaction raw materials mixes.
Preferably, the end part of the stirring rod far away from the first shaft is inclined downwards; the inclined stirring rod can avoid the reaction raw materials from being attached to the upper surface, so that excessive residues are generated after the reaction is finished; when the reaction barrel is used, the stirring rod rotates along with the first shaft and stirs reaction raw materials, and meanwhile, the end part of the stirring rod, far away from the first shaft, inclines downwards, so that the reaction raw materials attached to the upper surface of the stirring rod slide and are separated from the stirring rod due to the inclined upper surface of the stirring rod, and residues in the reaction barrel after the reaction is finished are reduced.
Preferably, a dehumidifying cloth is arranged in the first chamber and close to the first air pipe, and can remove moisture in the gas flowing into the first chamber from the first air pipe; during the use, because the quality of ultimate product can be influenced to too much moisture, so through being close to No. one trachea department in No. one cavity and being equipped with dehumidification cloth, detach the moisture in the gas that gets into No. one cavity inside, prevent that moisture from returning inside the reaction cylinder along with gas through the toper gas pocket again, influence ultimate product quality.
Preferably, the connecting rod is made of copper-aluminum alloy with better heat conductivity, and can transmit heat in gas flowing into the first cavity back to the inside of the reaction cylinder; during operation, the gas that flows out from the reaction cylinder inside also can take away partly heat, causes the calorific loss of reaction raw materials, and copper aluminum alloy's heat conductivility is very outstanding, therefore inside the connecting rod of copper aluminum alloy material can transmit the gas heat that gets into a cavity back to the reaction cylinder, compensatied the calorific loss of partly reaction raw materials.
The invention has the following beneficial effects:
1. according to the processing technology of the thermoplastic polyurethane elastomer, redundant gas in the reaction cylinder is conveyed into the first chamber through the first gas pipe, so that the problem that the final product is influenced because the reaction cannot be normally carried out due to overlarge internal gas pressure of the reaction cylinder is solved.
2. According to the processing technology of the thermoplastic polyurethane elastomer, the gas flowing into the first cavity from the first gas pipe acts on the rotating blade, so that the rotating blade drives the stirring blade to rotate and uniformly stir the reaction raw materials in the reaction cylinder, and the reaction raw materials are fully mixed and reacted finally, so that the reaction efficiency is improved, and the thermoplastic polyurethane elastomer with good quality is obtained.
Drawings
The invention will be further explained with reference to the drawings.
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a perspective view of a reaction cartridge employed in the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is an enlarged view of a portion of FIG. 2 at B;
FIG. 5 is an enlarged view of a portion of FIG. 2 at C;
FIG. 6 is a sectional view of a cartridge cover in a reaction cartridge employed in the present invention;
FIG. 7 is a sectional view of a first shaft of a reaction cartridge used in the present invention;
in the figure: the cylinder body 1, the first chamber 11, the chute 111, the connecting rod 112, the stirring blade 113, the rotating blade 114, the conical air hole 115, the reset plate 116, the pressure relief through hole 117, the dehumidifying cloth 118, the first shaft 12, the stirring rod 121, the arc-shaped plate 122, the strip-shaped through hole 123, the swinging blade 124, the fixing rod 125, the cylinder cover 2, the second bump 21, the air outlet channel 211, the groove 212, the air plugging plate 213, the first air pipe 22, the heater 3, the liquid inlet 4 and the liquid outlet 5.
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 to 7, the processing technology of a thermoplastic polyurethane elastomer according to the present invention comprises the following steps:
s1: respectively melting polyethylene glycol adipate, diphenylmethane diisocyanate and butanediol, adding into a drying device, heating and stirring at a low speed, and finally vacuumizing the inside of the drying device to obtain a dry reaction raw material;
s2: adding additives such as a lubricant, an antioxidant, a bismuth-based catalyst and the like into the dehydrated and dried polyethylene glycol adipate, uniformly mixing the materials to obtain a polyethylene glycol adipate premix, adding the dehydrated and dried diphenylmethane diisocyanate and butanediol into the polyethylene glycol adipate premix, adding the mixture into a reaction cylinder, heating and stirring at a high speed to preliminarily mix the raw materials;
s3: injecting the preliminarily mixed reaction raw materials into a double-screw reaction extruder, starting the double-screw reaction extruder and heating a machine barrel, after the reaction is finished, extruding and molding a product obtained by the reaction by an extruding part of the double-screw reaction extruder, and finally, bracing, granulating and drying to obtain product particles;
s4: pouring the obtained product particles into a drying device, heating to about 100 ℃ for drying, simultaneously stirring the product particles in the drying device at a high speed, and finally carrying out classified screening on the dried product to obtain a thermoplastic polyurethane elastomer;
the reaction cylinder adopted in the S2 comprises a cylinder body 1, a cylinder cover 2, a heater 3, a liquid inlet 4 and a liquid outlet 5, wherein the cylinder cover is installed at the top of the cylinder body 1, the liquid inlet 4 is arranged at the top of the cylinder cover 2, the heater 3 is installed on the upper surface of the bottom of the cylinder body 1, and the liquid outlet 5 is arranged at a position, close to the edge, of the bottom of the cylinder body 1; first convex blocks are symmetrically arranged on the outer surface of the side wall of the cylinder body 1, and the surface of each first convex block, which is contacted with the side wall of the cylinder body 1, is sunken towards the inside of the first convex block and is matched with the outer surface of the side wall of the cylinder body 1 to form a first cavity 11; the part of the outer surface of the side wall of the cylinder body 1, which is contacted with each first bump, is provided with a sliding groove 111, a connecting rod 112 is arranged in each sliding groove 111, one end of each connecting rod 112, which is close to the cylinder body 1, extends into the cylinder body 1 through the sliding groove 111, and one end of each connecting rod 112, which is far away from the cylinder body 1, extends into the first cavity 11; the end part of each connecting rod 112 extending into the barrel body 1 is provided with a stirring blade 113, and the end part of each connecting rod 112 extending into the first chamber 11 is provided with a rotating blade 114; a second bump 21 is arranged in the center of the upper surface of the cylinder cover 2, an air outlet channel 211 is arranged inside the second bump 21, the bottom end of the air outlet channel 211 is connected with the inside of the reaction cylinder, and the top end of the air outlet channel 211 is simultaneously connected with the bottom of the first chamber 11 on the left side of the cylinder body 1 and the top of the first chamber 11 on the right side of the cylinder body 1 through a first air pipe 22; when the inside thermal expansion that is heated of reaction cylinder, gaseous trachea 22 along No. one flows into cavity 11 of stack shell 1 both sides respectively, makes the stirring vane 113 of both sides rotate and stir the inside raw materials of reaction cylinder along opposite direction respectively, has not only solved the too big problem of inside atmospheric pressure of reaction cylinder, still makes reaction raw materials mix more evenly, and the reaction is more abundant.
When in use, when the reaction raw materials are added into the reaction cylinder from the liquid inlet 4, the heater 3 starts to heat; after the raw materials in the reaction cylinder are heated for a period of time, moisture in the raw materials is heated and evaporated, and meanwhile, gas in the reaction cylinder expands due to heating, so that the pressure in the reaction cylinder is increased; the normal operation of the reaction may be affected by the excessive pressure inside the reaction cylinder, so that by providing the gas outlet channel 211, a part of the gas flows into the first gas pipe 22 through the gas outlet channel 211, and then flows into the first chamber 11 from the first gas pipe 22, and the gas flowing into the first chamber 11 acts on the rotating blades 114 to rotate the rotating blades 114; because the first air pipe 22 is respectively connected with the bottom of the first chamber 11 on the left side of the reaction cylinder and the top of the first chamber 11 on the right side of the reaction cylinder, the rotating blades 114 in the first chambers 11 on the two sides of the reaction cylinder are acted by gas in opposite directions, so that the rotating directions of the two rotating blades 114 are opposite, and the rotating directions of the stirring blades 113 driven by the rotating blades 114 are also opposite; rotating blades 114 can drive connecting rod 112 to rotate when rotating, connecting rod 112 rotates and can drive stirring blades 113 to rotate, and rotating stirring blades 113 can act on the raw materials inside the reaction cylinder, so that the raw materials can be fully mixed and reacted, and the redundant gas in the reaction cylinder can be better utilized, thereby preventing the reaction process from being influenced by overlarge air pressure inside the reaction cylinder.
As a specific embodiment of the invention, a first shaft 12 is arranged at the central position of the bottom of the cylinder body 1, and the bottom end of the first shaft 12 is rotatably connected with the bottom of the cylinder body 1; stirring rods 121 are uniformly arranged on the side surface of the first shaft 12 far away from the stirring blades 113, an arc-shaped plate 122 is arranged on the side surface of the first shaft 12 near the stirring blades 113, strip-shaped through holes 123 are uniformly arranged on the surface of the arc-shaped plate 122, and the lower surface of the arc-shaped plate 122 is simultaneously contacted with the end parts of the stirring blades 113 on both sides of the first shaft 12; when the stirring blades 113 rotate, the first shaft 12 rotates under the action of the stirring blades 113, and simultaneously drives the stirring rod 121 to rotate and stir the raw materials in the reaction cylinder, so that the reaction raw materials are mixed more uniformly and react more fully; when the gas stirring device is used, when the rotating blade 114 is acted by gas and the connecting rod 112 drives the stirring blade 113 to rotate, the stirring blade 113 rotates and can act on the arc-shaped plate 122 contacted with the stirring blade 113, because the rotating directions of the stirring blades 113 at the two sides of the first shaft 12 are opposite, the acting directions of the stirring blades 113 on the parts of the arc-shaped plate 122 at the two sides of the first shaft 12 are opposite, and the strip-shaped through holes 123 are uniformly arranged on the lower surfaces of the arc-shaped plate 122 contacted with the stirring blades 113 to increase the friction coefficient of the lower surface of the arc-shaped plate 122, so that the arc-shaped plate 122 is acted by the stirring blades 113 to drive the first shaft 12; the first rotating shaft 12 can also drive the stirring rod 121 arranged on the surface of the first shaft 12 to rotate and stir the raw materials in the reaction cylinder, so that the raw materials in the reaction cylinder are mixed more fully, and the reaction efficiency is improved.
As a specific embodiment of the present invention, the top end of the first shaft 12 is symmetrically provided with a swing blade 124, and the swing blade 124 is elastically connected to the top end of the first shaft 12; when the first shaft 12 rotates, the first shaft drives the swing blades 124 to rotate, and the swing blades 124 swing up and down while rotating, so that gas in the reaction cylinder can rise and flow into the first gas pipe 22; when the shaft-one-shaft device is used, the rotating shaft-one-shaft 12 drives the swinging blade 124 arranged at; therefore, the swing blade 124 rotates under the action of the first shaft 12, stirs the reaction raw material and swings up and down due to the reaction force, so that the reaction raw material is stirred more uniformly, and the gas in the reaction cylinder can rise more violently due to the swing blade 124 swinging up and down; finally, more gas flows into the first gas pipe 22 in the reaction cylinder, so that the excessive gas pressure in the reaction cylinder is further reduced, and the rotating speed of the rotating blades 114 is increased under the action of stronger gas, so that the stirring blades 113 rotate more intensely, and the raw materials in the reaction cylinder are mixed more sufficiently.
As a specific embodiment of the invention, the part of the outer surface of the side wall of the barrel body 1, which is positioned inside the first chamber 11, is uniformly provided with conical air holes 115; the small end of each conical air hole 115 is positioned on the inner surface of the cylinder body 1, and the large end is positioned on the outer surface of the cylinder body 1; when the gas in the first chamber 11 is excessive, a part of the gas flows into the reaction cylinder from the conical gas hole 115, so that the reaction raw materials are mixed more uniformly and the reaction is more complete; when the gas flowing into the first chamber 11 from the first gas pipe 22 is excessive, the gas pressure inside the first chamber 11 is increased, and a part of the gas flows into the reaction cylinder from the tapered gas holes 115 on the side wall of the cylinder body 1 inside the first chamber 11; because toper gas pocket 115 tip is at stack shell 1 internal surface, consequently avoided the inside reaction raw materials of reaction cylinder to get into the cavity 11 inside from toper gas pocket 115, and toper gas pocket 115 main aspects are at the stack shell 1 surface of the cavity 11 inside, consequently the inside gas of cavity 11 can receive toper gas pocket 115 lateral wall effect and repressed when getting into from toper gas pocket 115, the gas that finally gets into the stack shell 1 inside through toper gas pocket 115 forms the great air current of pressure, the inside reaction raw materials of impact reaction cylinder, make reaction raw materials mix more evenly.
As a specific embodiment of the present invention, a reset plate 116 is disposed between the side wall of the first chamber 11 away from the reaction cylinder and the rotating blade 114, and the reset plate 116 is connected to the side wall of the first chamber 11 away from the reaction cylinder through a spring; when the rotating blade 114 moves away from the reaction cylinder due to the action of the stirring blade 113, the reset plate 116 may act on the rotating blade 114 to reset the rotating blade 114; when in use, the structure of the stirring blades 113 is similar to a fan blade, so that when the stirring blades 113 on both sides of the first shaft 12 rotate, reaction raw materials on the central positions of the opposite surfaces of the two stirring blades 113 can act, and simultaneously, the stirring blades 113 can also receive reaction force, so that each stirring blade 113 moves towards a direction away from the first shaft 12; the stirring blade 113 drives the connecting rod 112 to move in the chute 111 while moving, and the connecting rod 112 drives the rotating blade 114 to move in a direction away from the reaction cylinder while moving; the rotating blade 114 continues to move and contacts with the reset plate 116, and presses the reset plate 116 to deform the spring, when the distance between the opposite surfaces of the two stirring blades 113 becomes large, the reaction force applied to the stirring blades 113 is reduced, and the spring deforms and restores to enable the reset plate 116 to press the stirring blades 113 to return to the original position.
As a specific embodiment of the present invention, a group of pressure relief through holes 117 is uniformly disposed on the stirring blade 113; when the stirring device is used, the pressure relief through hole 117 formed in the surface of the stirring blade 113 can allow a part of reaction raw materials to flow through the through hole, so that the pressure applied to the stirring blade 113 is reduced, and the service life of the stirring blade 113 is prolonged.
As a specific embodiment of the present invention, a groove 212 is formed in a side wall of the air outlet channel 211, an air plugging plate 213 is embedded in the groove 212, and the length of the air plugging plate 213 embedded in the groove 212 is controlled to control the flow of air entering the first air pipe 22 inside the reaction cylinder; during the use, can make the stopper gas board 213 block the export of outlet channel 211 through embedding stopper gas board 213 recess 212, can change the size of outlet channel 211 export through the length of control stopper gas board 213 embedding recess 212, and then the inside gas flow who flows into a trachea 22 of control reaction section of thick bamboo, can influence the stirring process of whole reaction finally.
As a specific embodiment of the present invention, a fixed rod 125 is disposed on the stirring rod 121, one end of the fixed rod 125 is fixedly connected to the first shaft 12, and the other end is fixedly connected to the lower surface of the stirring rod 121; during the use, the fastness of puddler 121 on axle 12 not only can be strengthened to the dead lever 125 that is equipped with on the puddler 121, and dead lever 125 also can play the stirring effect when rotating along with puddler 121, makes the more even that reaction raw materials mixed.
As a specific embodiment of the present invention, the end of the stirring rod 121 away from the first shaft 12 is inclined downward; the inclined stirring rod 121 can prevent reaction raw materials from being attached to the upper surface, so that excessive residues are generated after the reaction is finished; when the reaction material stirring device is used, the stirring rod 121 rotates along with the first shaft 12 and stirs the reaction material, and at the same time, the end part of the stirring rod 121 far away from the first shaft 12 inclines downwards, so that the reaction material attached to the upper surface of the stirring rod 121 slides and is separated from the stirring rod 121 due to the upper surface of the inclined stirring rod 121, and the residue in the reaction cylinder after the reaction is finished is reduced.
As a specific embodiment of the present invention, a dehumidifying cloth 118 is disposed in the first chamber 11 near the first air pipe 22, and the dehumidifying cloth 118 can remove moisture in the air flowing into the first chamber 11 from the first air pipe 22; when the gas dehumidifying device is used, because the quality of a final product is influenced by excessive moisture, the moisture in the gas entering the first chamber 11 is removed by arranging the dehumidifying cloth 118 in the first chamber 11 close to the first gas pipe 22, and the moisture is prevented from returning to the inside of the reaction cylinder along with the gas through the conical gas hole 115 to influence the quality of the final product.
As a specific embodiment of the present invention, the connecting rod 112 is made of a copper-aluminum alloy with good heat conductivity, and can transmit heat in the gas flowing into the first chamber 11 back to the inside of the reaction cylinder; during operation, the gas that flows out from the reaction cylinder inside also can take away partly heat, causes the calorific loss of reaction raw materials, and copper aluminum alloy's heat conductivility is very outstanding, therefore connecting rod 112 of copper aluminum alloy material can be with the gaseous heat transfer who gets into a cavity 11 inside returning the reaction cylinder, compensate the calorific loss of partly reaction raw materials.
When in use, when the reaction raw materials are added into the reaction cylinder from the liquid inlet 4, the heater 3 starts to heat; after the raw materials in the reaction cylinder are heated for a period of time, the moisture in the raw materials is heated and evaporated, and meanwhile, the gas shadow in the reaction cylinder is heated and expanded, so that the pressure in the reaction cylinder is increased; the normal operation of the reaction may be affected by the excessive pressure inside the reaction cylinder, so that by providing the gas outlet channel 211, a part of the gas flows into the first gas pipe 22 through the gas outlet channel 211, and then flows into the first chamber 11 from the first gas pipe 22, and the gas flowing into the first chamber 11 acts on the rotating blades 114 to rotate the rotating blades 114; because the first air pipe 22 is respectively connected with the bottom of the first chamber 11 on the left side of the reaction cylinder and the top of the first chamber 11 on the right side of the reaction cylinder, the rotating blades 114 in the first chambers 11 on the two sides of the reaction cylinder are acted by gas in opposite directions, so that the rotating directions of the two rotating blades 114 are opposite, and the rotating directions of the stirring blades 113 driven by the rotating blades 114 are also opposite; when the rotating blades 114 rotate, the connecting rods 112 are driven to rotate, the connecting rods 112 rotate to drive the stirring blades 113 to rotate, and the rotating stirring blades 113 act on the raw materials in the reaction cylinder, so that the raw materials can be fully mixed and reacted; when the rotating blade 114 is acted by gas and the connecting rod 112 drives the stirring blade 113 to rotate, the rotation of the stirring blade 113 simultaneously acts on the arc-shaped plate 122 contacted with the stirring blade 113, because the rotation directions of the stirring blades 113 at the two sides of the first shaft 12 are opposite, the acting directions of the stirring blades 113 on the parts of the arc-shaped plate 122 at the two sides of the first shaft 12 are opposite, and the strip-shaped through holes 123 are uniformly arranged on the lower surface of the arc-shaped plate 122 contacted with the stirring blades 113 to increase the friction coefficient of the lower surface of the arc-shaped plate 122, so that the arc-shaped plate 122 is acted by the stirring blades 113 to drive the first shaft 12 to rotate; the rotating first shaft 12 can also drive a stirring rod 121 arranged on the surface of the first shaft 12 to rotate and stir the raw materials in the reaction cylinder; when the first shaft 12 rotates under the action of the stirring blade 113, the rotating first shaft 12 drives the swinging blade 124 arranged at the top of the first shaft 12 to rotate, and because the swinging blade 124 is elastically connected with the top end of the first shaft 12, the swinging blade 124 can swing up and down relative to the first shaft 12; therefore, the swing blade 124 rotates under the action of the first shaft 12, stirs the reaction raw material and swings up and down due to the reaction force, so that the reaction raw material is stirred more uniformly, and the gas in the reaction cylinder can rise more violently due to the swing blade 124 swinging up and down; more gas flows into the first gas pipe 22 in the reaction cylinder, so that the over-high gas pressure in the reaction cylinder is further reduced, and the rotating speed of the rotating blades 114 is increased under the action of stronger gas, so that the stirring blades 113 rotate more violently, and the raw materials in the reaction cylinder are mixed more fully; finally, the problem of overlarge air pressure in the reaction cylinder is solved, and the reaction raw materials are fully mixed and reacted to obtain the thermoplastic polyurethane elastomer with better quality.
The front, the back, the left, the right, the upper and the lower are all based on the figure 2 in the attached drawings of the specification, according to the standard of the observation angle of a person, the side of the device facing an observer is defined as the front, the left side of the observer is defined as the left, and the like.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplifying the description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the scope of the present invention.
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 (11)

1. A processing technology of thermoplastic polyurethane elastomer is characterized in that: the process comprises the following steps:
s1: respectively melting polyethylene glycol adipate, diphenylmethane diisocyanate and butanediol, adding into a drying device, heating and stirring at a low speed, and finally vacuumizing the inside of the drying device to obtain a dry reaction raw material;
s2: adding additives such as a lubricant, an antioxidant, a bismuth-based catalyst and the like into the dehydrated and dried polyethylene glycol adipate, uniformly mixing the materials to obtain a polyethylene glycol adipate premix, adding the dehydrated and dried diphenylmethane diisocyanate and butanediol into the polyethylene glycol adipate premix, adding the mixture into a reaction cylinder, heating and stirring at a high speed to preliminarily mix the raw materials;
s3: injecting the preliminarily mixed reaction raw materials into a double-screw reaction extruder, starting the double-screw reaction extruder and heating a machine barrel, after the reaction is finished, extruding and molding a product obtained by the reaction by an extruding part of the double-screw reaction extruder, and finally, bracing, granulating and drying to obtain product particles;
s4: pouring the obtained product particles into a drying device, heating to about 100 ℃ for drying, simultaneously stirring the product particles in the drying device at a high speed, and finally carrying out classified screening on the dried product to obtain a thermoplastic polyurethane elastomer;
the reaction cylinder adopted in the S2 comprises a cylinder body (1), a cylinder cover (2), a heater (3), a liquid inlet (4) and a liquid outlet (5), wherein the cylinder cover is installed at the top of the cylinder body (1), the liquid inlet (4) is arranged at the top of the cylinder cover (2), the heater (3) is installed on the upper surface of the bottom of the cylinder body (1), and the liquid outlet (5) is arranged at a position, close to the edge, of the bottom of the cylinder body (1); first convex blocks are symmetrically arranged on the outer surface of the side wall of the barrel body (1), and the surface, which is in contact with the side wall of the barrel body (1), of each first convex block is sunken towards the inside of each first convex block and is matched with the outer surface of the side wall of the barrel body (1) to form a first cavity (11); the outer surface of the side wall of the barrel body (1) is provided with a sliding groove (111) at the part contacted with each first convex block, a connecting rod (112) is arranged in each sliding groove (111), one end of each connecting rod (112) close to the barrel body (1) extends into the barrel body (1) through the sliding groove (111), and one end of each connecting rod (112) far away from the barrel body (1) extends into the first cavity (11); the end part of each connecting rod (112) extending into the barrel body (1) is provided with a stirring blade (113), and the end part of each connecting rod (112) extending into the first chamber (11) is provided with a rotating blade (114); a second bump (21) is arranged in the center of the upper surface of the barrel cover (2), an air outlet channel (211) is arranged inside the second bump (21), the bottom end of the air outlet channel (211) is connected with the inside of the reaction barrel, and the top end of the air outlet channel (211) is simultaneously connected with the bottom of a first cavity (11) on the left side of the barrel body (1) and the top of the first cavity (11) on the right side of the barrel body (1) through a first air pipe (22); when the inside thermal expansion that is heated of reaction cylinder, gaseous No. 11 that flows in stack shell (1) both sides respectively along trachea (22), make stirring vane (113) of both sides rotate and stir the inside raw materials of reaction cylinder along opposite direction respectively, not only solved the too big problem of inside atmospheric pressure of reaction cylinder, still make reaction raw materials mix more evenly, the reaction is more abundant.
2. The process for processing a thermoplastic polyurethane elastomer according to claim 1, wherein: a first shaft (12) is arranged in the center of the bottom of the barrel body (1), and the bottom end of the first shaft (12) is rotatably connected with the bottom of the barrel body (1); stirring rods (121) are uniformly arranged at the position, far away from the stirring blades (113), of the side surface of the first shaft (12), an arc-shaped plate (122) is arranged at the position, close to the stirring blades (113), of the first shaft (12), strip-shaped through holes (123) are uniformly formed in the surface of the arc-shaped plate (122), and the lower surface of the arc-shaped plate (122) is simultaneously contacted with the end parts of the stirring blades (113) at the two sides of the first shaft (12); when stirring vane (113) rotated, a axle (12) received stirring vane (113) effect and rotated, drove puddler (121) simultaneously and rotate and stir the inside raw materials of reaction cylinder, made reaction raw materials mix more evenly, reacted more fully.
3. The process for processing a thermoplastic polyurethane elastomer according to claim 2, wherein: swing blades (124) are symmetrically arranged at the top end of the first shaft (12), and the swing blades (124) are elastically connected with the top end of the first shaft (12); when the first shaft (12) rotates, the first shaft drives the swing blades (124) to rotate, and the swing blades (124) swing up and down while rotating, so that gas in the reaction cylinder can rise and flow into the first gas pipe (22).
4. The process for producing a thermoplastic polyurethane elastomer according to claim 3, wherein: conical air holes (115) are uniformly formed in the part, located inside the first cavity (11), of the outer surface of the side wall of the barrel body (1); the small end of each conical air hole (115) is positioned on the inner surface of the cylinder body (1), and the large end of each conical air hole is positioned on the outer surface of the cylinder body (1); when the gas in the first chamber (11) is too much, a part of the gas flows into the reaction cylinder from the conical air holes (115) and enables the reaction raw materials to be mixed more uniformly and the reaction to be more sufficient.
5. The process for producing a thermoplastic polyurethane elastomer according to claim 4, wherein: a reset plate (116) is arranged between the side wall of the first chamber (11) far away from the reaction cylinder and the rotating blade (114), and the reset plate (116) is connected with the side wall of the first chamber (11) far away from the reaction cylinder through a spring; when the rotating blade (114) moves in a direction away from the reaction cylinder due to the action of the stirring blade (113), the reset plate (116) can act on the rotating blade (114) to reset the rotating blade (114).
6. The process for producing a thermoplastic polyurethane elastomer according to claim 5, wherein: a group of pressure relief through holes (117) are uniformly formed in the stirring blade (113).
7. The process for producing a thermoplastic polyurethane elastomer according to claim 6, wherein: the lateral wall of the air outlet channel (211) is provided with a groove (212), the groove (212) is embedded with an air plugging plate (213), and the gas flow entering the first air pipe (22) in the reaction cylinder can be controlled by controlling the length of the air plugging plate (213) embedded in the groove (212).
8. The process for producing a thermoplastic polyurethane elastomer according to claim 7, wherein: and a fixing rod (125) is arranged on the stirring rod (121), one end of the fixing rod (125) is connected with the first shaft (12), and the other end of the fixing rod is connected with the lower surface of the stirring rod (121).
9. The process for producing a thermoplastic polyurethane elastomer according to claim 8, wherein: the end part of the stirring rod (121) far away from the first shaft (12) is inclined downwards; the inclined stirring rod (121) can avoid the reaction raw materials from attaching to the upper surface, so that excessive residues are generated after the reaction is finished.
10. The process for processing a thermoplastic polyurethane elastomer according to claim 9, wherein: and a dehumidifying cloth (118) is arranged in the first chamber (11) and close to the first air pipe (22), and the dehumidifying cloth (118) can remove moisture in the air flowing into the first chamber (11) from the first air pipe (22).
11. The process for processing a thermoplastic polyurethane elastomer according to claim 10, wherein: the connecting rod (112) is made of copper-aluminum alloy with good heat conductivity, and can transmit heat in gas flowing into the first cavity (11) back to the interior of the reaction cylinder.
CN202010835727.7A 2020-08-19 2020-08-19 Processing technology of thermoplastic polyurethane elastomer Pending CN111978501A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115308321A (en) * 2022-07-04 2022-11-08 浙江赛鹭鑫仪器有限公司 Fluorine gas and fluoride analysis system and method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115308321A (en) * 2022-07-04 2022-11-08 浙江赛鹭鑫仪器有限公司 Fluorine gas and fluoride analysis system and method

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