PUR textile adhesive rapid evaluation jig for laboratory

Abstract

The utility model discloses a PUR textile adhesive rapid evaluation jig for a laboratory. The PUR textile adhesive rapid evaluation jig comprises a first synthesis system, a second synthesis system, a mixing system and a testing system. According to the device disclosed by the utility model, polyhydric alcohol containing a hydrophilic chain segment and MDI (Diphenyl Diisocyanate) are terminated through the first synthesis system to generate a low-viscosity NCO-terminated hydrophilic prepolymer; oily polyether / polyester polyol and MDI react through the second synthesis system, color paste and related auxiliaries are mixed to react to synthesize NCO-terminated polyol, then materials are mixed through the mixing system to obtain a finished product of the textile adhesive, and finally discharging compatibility and tackifying aging performance verification are conducted through the testing system. The experiment efficiency of synthesizing and testing the low-viscosity textile adhesive in a laboratory is effectively improved, and the test period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical experimental equipment, in particular to a PUR textile adhesive rapid evaluation jig for use in a laboratory. Background Art

[0002] The main component of moisture-curing reactive polyurethane hot melt adhesive (Polyurethane Reactive, PUR) is an isocyanate-terminated polyurethane prepolymer. PUR has adjustable adhesion and toughness (elasticity), and has excellent bonding strength, temperature resistance, chemical corrosion resistance, and aging resistance. In recent years, it has become one of the important varieties in the adhesive industry and is widely used in national economic fields such as packaging, wood processing, automobiles, textiles, electromechanical, and aerospace.

[0003] When preparing PUR textile adhesive in the current laboratory, it is necessary to specifically prepare the hydrophilic part NCO prepolymer and the oily NCO prepolymer. At the same time, as the application scenarios of textile adhesive increase, there will be functional requirements such as flame retardancy, lubrication, and smoothness. There are certain requirements for low viscosity and moisture permeability. Therefore, it is necessary to adjust the raw material composition and ratio of the hydrophilic part and the oleophilic part multiple times, and then artificially synthesize the glue and conduct compatibility, adhesion and aging tests, which affects the test efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a rapid evaluation jig for PUR textile glue used in a laboratory.

[0005] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions, including:

[0006] A first synthesis system, comprising a first vacuum distillation kettle and a first mold temperature controller, wherein a first stirring blade is provided inside the first vacuum distillation kettle, and the first synthesis system is used for reacting and synthesizing a prepolymer;

[0007] A second synthesis system, comprising a second vacuum distillation kettle and a second mold temperature controller, wherein the second vacuum distillation kettle is provided with a second stirring blade and a dispersion disk, and the second synthesis system is used for dispersing the auxiliary agent and reacting to synthesize the prepolymer;

[0008] A mixing system, comprising a mixing reactor and a third mold temperature controller, wherein a third stirring blade is provided inside the mixing reactor, and the mixing system is used to mix materials to obtain a finished product;

[0009] The test system includes a compatibility test component and an aging test component. The compatibility test component includes an electric heating module and a ground glass tube. The aging test component includes an open stirring tank and a fourth stirring blade.

[0010] As a further description of the above technical solution, one side of the top of the first vacuum distillation kettle is connected to the first nitrogen tank through a pipeline, and the other side of the top of the first vacuum distillation kettle is connected to the first vacuum pump through a pipeline, and a first pressure gauge is provided on the pipeline connecting the first vacuum distillation kettle and the first nitrogen tank.

[0011] As a further description of the above technical solution, the bottom of one side of the first vacuum distillation kettle is connected to the first mold temperature controller through a pipeline, and the middle of the other side of the first vacuum distillation kettle is connected to the first mold temperature controller through a pipeline.

[0012] As a further description of the above technical solution, one side of the top of the second vacuum distillation kettle is connected to the second nitrogen tank through a pipeline, and the other side of the top of the second vacuum distillation kettle is connected to the second vacuum pump through a pipeline, and a second pressure gauge is provided on the pipeline connecting the second vacuum distillation kettle and the second nitrogen tank.

[0013] As a further description of the above technical solution, the bottom of one side of the second vacuum distillation kettle is connected to the second mold temperature controller through a pipeline, and the middle of the other side of the second vacuum distillation kettle is connected to the second mold temperature controller through a pipeline.

[0014] As a further description of the above technical solution, the bottom of the first vacuum distillation kettle and the bottom of the second vacuum distillation kettle are connected to the mixing reactor through a pipeline, and a first metering pump is provided on the pipeline connecting the first vacuum distillation kettle and the mixing reactor, and a second metering pump is provided on the pipeline connecting the second vacuum distillation kettle and the mixing reactor.

[0015] As a further description of the above technical solution, one side of the top of the mixing reactor is connected to the third nitrogen tank through a pipeline, and the other side of the top of the mixing reactor is connected to the third vacuum pump through a pipeline. A third pressure gauge is provided on the pipeline connecting the mixing reactor and the third nitrogen tank.

[0016] As a further description of the above technical solution, the bottom of the mixing reactor is connected to the ground glass tube and the open stirring tank through a pipeline, and a third metering pump is provided on the pipeline connecting the mixing reactor, the ground glass tube and the open stirring tank.

[0017] As a further description of the above technical solution, the electric heating module is coated on the ground glass tube, and the electric heating module is used to heat the ground glass tube.

[0018] As a further description of the above technical solution, the bottom of one side of the open stirring tank is connected to the fourth mold temperature controller through a pipeline, and the middle of the other side of the open stirring tank is connected to the fourth mold temperature controller through a pipeline.

[0019] The beneficial effects of the utility model are as follows:

[0020] The utility model caps polyols containing hydrophilic segments and MDI through a first synthesis system to generate low-viscosity NCO-capped hydrophilic prepolymers; reacts oily polyether / polyester polyols with MDI through a second synthesis system, and mixes with color paste and related additives to synthesize NCO-capped polyols; then mixes the materials through a mixing system to obtain finished textile adhesive; finally, the compatibility of the output material and the viscosity-increasing aging properties are verified through a testing system, thereby effectively improving the experimental efficiency of laboratory low-viscosity textile adhesive synthesis and testing and reducing the testing cycle.

[0021] In order to more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a quick evaluation jig for PUR textile adhesives of the utility model.

[0023] Reference numerals:

[0024] 1. First synthesis system; 11. First vacuum distillation kettle; 12. First mold temperature controller; 13. First stirring blade; 14. First nitrogen tank; 15. First vacuum pump; 16. First pressure gauge; 17. First metering pump; 2. Second synthesis system; 21. Second vacuum distillation kettle; 22. Second mold temperature controller; 23. Second stirring blade; 24. Dispersion plate; 25. Second nitrogen tank; 26. Second vacuum pump; 27. Second pressure gauge; 28. Second metering pump; 3. Mixing system; 31. Mixing reactor; 32. Third mold temperature controller; 33. Third stirring blade; 34. Third nitrogen tank; 35. Third vacuum pump; 36. Third pressure gauge; 37. Third metering pump; 4. Testing system; 41. Compatibility test assembly; 411. Electric heating module; 412. Ground glass tube; 42. Aging test assembly; 421. Open stirring tank; 422. Fourth stirring blade; 43. Fourth mold temperature controller. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention.

[0026] like Figure 1 As shown, in one embodiment, a rapid evaluation jig for PUR textile adhesive in a laboratory includes: a first synthesis system 1 , a second synthesis system 2 , a mixing system 3 and a testing system 4 .

[0027] Among them, the first synthesis system 1 is used to react and synthesize hydrophilic prepolymers, the second synthesis system 2 is used to react and synthesize oily prepolymers after mixing additives, the mixing system 3 is used to mix materials to obtain finished PUR textile adhesives, and the testing system 4 is used to verify the compatibility and viscosity-increasing aging properties of the output materials.

[0028] Please continue reading Figure 1 In this embodiment, the first synthesis system 1 includes a first vacuum distillation kettle 11 and a first mold temperature controller 12, and a first stirring blade 13 is provided inside the first vacuum distillation kettle 11 for stirring the material.

[0029] Furthermore, one side of the top of the first vacuum distillation kettle 11 is connected to the first nitrogen tank 14 through a pipeline, and the other side is connected to the first vacuum pump 15 through a pipeline, so as to effectively adjust the internal gas environment.

[0030] In addition, a first pressure gauge 16 is installed on the pipeline connected to the first nitrogen tank 14 of the first vacuum distillation kettle 11 so as to monitor the pressure change in the first vacuum distillation kettle 11 in real time.

[0031] In order to control the reaction temperature, one side of the bottom and the middle of the other side of the first vacuum distillation kettle 11 are respectively connected to the first mold temperature controller 12 through pipes, and the circulation flow of the insulation medium is realized through the pipes, thereby accurately adjusting the temperature in the first vacuum distillation kettle 11, thereby ensuring the stability of the reaction conditions.

[0032] During the reaction process, the first reduced pressure distillation kettle 11 utilizes the combined action of the first nitrogen tank 14, the first pressure gauge 16 and the first vacuum pump 15 to dynamically adjust the internal gas environment, while the first mold temperature controller 12 adjusts the reaction temperature to ensure that the reaction is carried out under optimal conditions, thereby adjusting the moisture permeability and synthesizing NCO-terminated polyethylene glycol (PEG) and its derivatives. The final product is an NCO-terminated prepolymer with good water solubility and low viscosity.

[0033] Please continue reading Figure 1 In this embodiment, the second synthesis system 2 includes a second vacuum distillation kettle 21 and a second mold temperature controller 22, and a second stirring blade 23 and a dispersion disk 24 are provided inside the second vacuum distillation kettle 21 for stirring the materials.

[0034] Furthermore, one side of the top of the second vacuum distillation kettle 21 is connected to the second nitrogen tank 25 through a pipeline, and the other side is connected to the second vacuum pump 26 through a pipeline, so as to effectively adjust the internal gas environment.

[0035] In addition, a second pressure gauge 27 is installed on the pipeline connected to the second nitrogen tank 25 of the second vacuum distillation kettle 21 to monitor the pressure change in the second vacuum distillation kettle 21 in real time.

[0036] In order to control the reaction temperature, one side of the bottom and the middle of the other side of the second vacuum distillation kettle 21 are respectively connected to the second mold temperature controller 22 through pipes, and the circulation flow of the insulation medium is realized through the pipes, thereby accurately adjusting the temperature in the second vacuum distillation kettle 21, thereby ensuring the stability of the reaction conditions.

[0037] During the reaction, the second vacuum distillation kettle 21 dynamically regulates the internal gas environment using the combined action of the first nitrogen tank 14, the second pressure gauge 27, and the second vacuum pump 26. The second mold temperature controller 22 regulates the reaction temperature to ensure optimal reaction conditions. During the synthesis process, the oily polyether or polyester polyol reacts chemically with the isocyanate (MDI), while the colorant and other related additives are mixed in. The dispersion plate 24 improves the dispersion of the oily material and the colorant, ensuring the overall stability and homogeneity of the reaction system. The resulting product is an NCO-terminated polyol.

[0038] Furthermore, the bottom of the first vacuum distillation kettle 11 and the bottom of the second vacuum distillation kettle 21 are connected to the mixing reactor 31 through a pipeline. A first metering pump 17 is provided on the pipeline connecting the first vacuum distillation kettle 11 and the mixing reactor 31, and a second metering pump 28 is provided on the pipeline connecting the second vacuum distillation kettle 21 and the mixing reactor 31, so that the products of the first reaction system and the second reaction system are added to the mixing reactor 31 according to the designed flow rate.

[0039] Please continue reading Figure 1 In this embodiment, the mixing system 3 includes a mixing reactor 31 and a third mold temperature controller 32. A third stirring blade 33 is provided inside the mixing reactor 31 for stirring the material.

[0040] Furthermore, one side of the top of the mixing reactor 31 is connected to the third nitrogen tank 34 through a pipeline, and the other side is connected to the third vacuum pump 35 through a pipeline, so as to effectively adjust the internal gas environment.

[0041] In addition, a third pressure gauge 36 is installed on the pipeline connected to the third nitrogen tank 34 of the mixing reactor 31 to monitor the pressure change in the mixing reactor 31 in real time.

[0042] In order to control the reaction temperature, one side of the bottom and the middle of the other side of the mixing reactor 31 are connected to the third mold temperature controller 32 through pipes respectively. The circulation flow of the insulation medium is realized through the pipes, and the temperature in the mixing reactor 31 is accurately adjusted to ensure the stability of the reaction conditions.

[0043] During the reaction, the mixing reactor 31 dynamically adjusts the internal gas environment using the combined action of the third nitrogen tank 34, the third pressure gauge 36, and the third vacuum pump 35. The third mold temperature controller 32 regulates the reaction temperature to ensure optimal reaction conditions. During the synthesis process, the mixture is added to the mixing reactor at the designed flow rate of the metering pump and then stirred and dispersed under vacuum for a specified period of time to obtain the finished PUR textile adhesive.

[0044] Furthermore, the bottom of the mixing reactor 31 is connected to the ground glass tube 412 and the open stirring tank 421 through a pipe. A third metering pump 37 is provided on the pipe connecting the mixing reactor 31 with the ground glass tube 412 and the open stirring tank 421 to add the product of the mixing system 3 to the ground glass tube 412 and the open stirring tank 421 according to the designed flow rate.

[0045] Please continue reading Figure 1 In this embodiment, the testing system 4 includes a compatibility testing component 41 and an aging testing component 42. The compatibility testing component 41 includes an electric heating module 411 and a ground glass tube 412, while the aging testing component 42 includes an open stirring tank 421 and a fourth stirring blade 422.

[0046] Furthermore, a ground glass tube 412 is directly connected to the discharge port of the mixing reactor 31, and an electric heating module 411 is coated on the ground glass tube 412 to heat it. Because the pre-pipeline is a nitrogen-protected sealed pipeline and the liquid is pumped in via a metering pump, nitrogen protection is not required for this test step. After the material enters, the electric heating module 411 directly and continuously heats the ground glass tube 412 to verify whether the prepared PUR textile adhesive has phase separation.

[0047] Furthermore, the bottom of one side of the open stirring tank 421 is connected to the fourth mold temperature controller 43 via a pipe, and the middle of the other side of the open stirring tank 421 is connected to the fourth mold temperature controller 43 via a pipe. Specifically, the open stirring tank 421 and the fourth stirring paddle are both made of Teflon material. The open stirring tank 421 can simulate the glue coating scenario in an open system and cooperate with the fourth mold temperature controller 43 to realize the circulation of the insulation medium through the pipe, thereby accurately adjusting the temperature of the open stirring tank 421 and verifying the performance changes of the glue after exposure to air and aging test.

[0048] Through the above technical scheme, the present application adjusts the moisture permeability through the first synthesis system 1 and then reacts to synthesize a low-viscosity NCO-terminated prepolymer with a certain water solubility, reacts the oily polyether / polyester polyol and MDI through the second synthesis system 2, and mixes the color paste and related additives to react to synthesize the NCO-terminated polyol, and then mixes the materials through the mixing system 3 to obtain the finished textile adhesive, and finally verifies the output compatibility and viscosity-increasing aging properties through the testing system 4, which effectively improves the experimental efficiency of laboratory textile adhesive synthesis and testing and reduces the testing cycle.

[0049] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A rapid evaluation jig for PUR textile adhesives for laboratory use, characterized in that: include: A first synthesis system (1), comprising a first vacuum distillation kettle (11) and a first mold temperature controller (12), wherein a first stirring blade (13) is provided inside the first vacuum distillation kettle (11), and the first synthesis system (1) is used for reacting and synthesizing a prepolymer; A second synthesis system (2), comprising a second vacuum distillation kettle (21) and a second mold temperature controller (22), wherein a second stirring blade (23) and a dispersion disk (24) are provided inside the second vacuum distillation kettle (21), and the second synthesis system (2) is used for dispersing the auxiliary agent and reacting to synthesize the prepolymer; A mixing system (3), the mixing system (3) comprising a mixing reactor (31) and a third mold temperature controller (32), a third stirring blade (33) being provided inside the mixing reactor (31), and the mixing system (3) being used to mix materials to obtain a finished product; A testing system (4) comprising a compatibility testing component (41) and an aging testing component (42); the compatibility testing component (41) comprising an electric heating module (411) and a ground glass tube (412); and the aging testing component (42) comprising an open stirring tank (421) and a fourth stirring blade (422).

2. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: One side of the top of the first vacuum distillation kettle (11) is connected to the first nitrogen tank (14) through a pipeline, and the other side of the top of the first vacuum distillation kettle (11) is connected to the first vacuum pump (15) through a pipeline. A first pressure gauge (16) is provided on the pipeline connecting the first vacuum distillation kettle (11) and the first nitrogen tank (14).

3. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: The bottom of one side of the first vacuum distillation kettle (11) is connected to the first mold temperature controller (12) through a pipeline, and the middle of the other side of the first vacuum distillation kettle (11) is connected to the first mold temperature controller (12) through a pipeline.

4. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: One side of the top of the second vacuum distillation kettle (21) is connected to the second nitrogen tank (25) through a pipeline, and the other side of the top of the second vacuum distillation kettle (21) is connected to the second vacuum pump (26) through a pipeline. A second pressure gauge (27) is provided on the pipeline connecting the second vacuum distillation kettle (21) and the second nitrogen tank (25).

5. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: The bottom of one side of the second vacuum distillation kettle (21) is connected to the second mold temperature controller (22) through a pipeline, and the middle of the other side of the second vacuum distillation kettle (21) is connected to the second mold temperature controller (22) through a pipeline.

6. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: The bottom of the first vacuum distillation kettle (11) and the bottom of the second vacuum distillation kettle (21) are connected to the mixing reactor (31) through a pipeline. A first metering pump (17) is provided on the pipeline connecting the first vacuum distillation kettle (11) and the mixing reactor (31), and a second metering pump (28) is provided on the pipeline connecting the second vacuum distillation kettle (21) and the mixing reactor (31).

7. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: One side of the top of the mixing reactor (31) is connected to a third nitrogen tank (34) through a pipeline, and the other side of the top of the mixing reactor (31) is connected to a third vacuum pump (35) through a pipeline. A third pressure gauge (36) is provided on the pipeline connecting the mixing reactor (31) and the third nitrogen tank (34).

8. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: The bottom of the mixing reaction kettle (31) is connected to the ground glass tube (412) and the open stirring tank (421) through a pipeline, and a third metering pump (37) is provided on the pipeline connecting the mixing reaction kettle (31) with the ground glass tube (412) and the open stirring tank (421).

9. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: The electric heating module (411) is coated on the ground glass tube (412), and the electric heating module (411) is used to heat the ground glass tube (412).

10. The laboratory PUR textile adhesive rapid evaluation jig according to claim 1, characterized in that: The bottom of one side of the open stirring tank (421) is connected to the fourth mold temperature controller (43) through a pipeline, and the middle of the other side of the open stirring tank (421) is connected to the fourth mold temperature controller (43) through a pipeline.

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