Method for manufacturing TPU (Thermoplastic Polyurethane) tape-casting extrusion stepped structure Newmeter-scale

Abstract

The invention relates to a TPU (thermoplastic polyurethane) tape-casting extrusion stepped structure nemami-level manufacturing method, which comprises the following steps of: selecting a TPU raw material, and treating the raw material to enable the TPU raw material to have good flowability and machinability; adding the treated TPU raw material into high-precision casting extrusion equipment, heating in a heating cavity of the extrusion equipment, and then extruding by using a corresponding mold under a specific pressure value, so that the TPU raw material gradually forms a stepped structure; according to the invention, precise temperature and pressure control is carried out on the TPU raw material in the processing process, so that the internal structure of the material is more uniform, the performance stability is obviously improved, and under different environmental conditions, the change of mechanical properties, thermal properties and the like of the TPU material is small; the reliability in a complex application environment is enhanced; and a TPU step structure at an extrusion part is realized by adopting a die with a continuous sawtooth-shaped structure, and the requirement on a fine structure of a material in the high-end fields of microelectronics, nanotechnology and the like can be met due to the neometre-level structural precision.

Description

Technical Field

[0001] The invention relates to the technical field of material processing and manufacturing, and in particular to a method for manufacturing a TPU cast extrusion ladder structure neumi-grade. Background Art

[0002] With the continuous development of science and technology, the requirements for material performance are increasing day by day. As a polymer material with excellent performance, TPU has a reversible intermolecular cross-linking structure, which weakens the intermolecular force in the molten state or solution state, and after cooling or solvent evaporation, it is connected together by strong intermolecular force, restoring the original solid performance, therefore, it has been widely used in many fields.

[0003] However, the traditional TPU manufacturing process has certain limitations in terms of structural accuracy and performance optimization. The current manufacturing method is difficult to achieve nanometer-level fine structural control, resulting in the material's performance in some specific application scenarios not being fully utilized, such as in the heat dissipation of high-performance electronic devices, precise control of microfluidic devices, etc. Therefore, a new manufacturing method is needed to solve these problems and improve the structural accuracy and performance of TPU materials. Summary of the invention

[0004] In view of the above technical problems, the present invention provides a nanometer-level production method for TPU cast extrusion stepped structure, which can realize precise control of TPU material structure, achieve nanometer-level precision, improve the comprehensive performance of the material, and meet the requirements of high-precision structure and high performance of materials in high-end scientific and technological fields such as microelectronics and nanotechnology.

[0005] To achieve the above object, the technical solution of the present invention is as follows:

[0006] The specific steps of the TPU cast extrusion step structure neumi-grade production method are as follows:

[0007] Step 1, selecting TPU raw materials and processing the raw materials to make them have good fluidity and processability;

[0008] Step 2, adding the TPU raw material treated in step 1 into a high-precision cast extrusion device, heating it in a heating cavity of the extrusion device, and then using a corresponding mold and extruding it at a specific pressure value, so that the TPU raw material gradually forms a stepped structure;

[0009] Step 3, cooling and solidifying the formed TPU step structure.

[0010] Specifically, the specific content of the principle processing in step 1 is: drying the TPU raw material at a temperature ranging from 175 to 190°, and drying and discharging the moisture in the TPU raw material.

[0011] Specifically, in step 2, the temperature in the heating cavity of the extrusion equipment is set within the range of 210 to 220 degrees.

[0012] Specifically, the specific pressure value in step 2 is set at 3-4 MPa.

[0013] Specifically, the mold in step 2 is configured to have a continuous serrated structure.

[0014] Furthermore, the mold in step 2 is chemically treated to form a Teflon coating on the outer surface of the mold, so that the mold has good smoothness and demoulding performance, preventing the TPU material from adhering to the mold during the molding process and affecting the product quality.

[0015] Specifically, the specific contents of the cooling and solidification process in step 3 are as follows:

[0016] 1) The newly formed TPU step structure is air-cooled. Since the TPU step structure is at a high temperature of 100 to 120°C, the temperature of the TPU step structure is cooled to 80 to 90°C by uniform cold air cooling.

[0017] 2) The TPU step structure that has been subjected to uniform air cooling is subjected to water cooling to a temperature of 30-40°;

[0018] 3) The TPU step structure that has undergone water cooling is subjected to room temperature cooling to a room temperature stage.

[0019] Furthermore, during the air cooling stage in step 3, the outer surface layer of the TPU step structure is subjected to an extrusion and fixing treatment, and a PET material layer is provided on the outer surface layer of the TPU step structure.

[0020] Beneficial effects of the present invention:

[0021] The present invention performs precise temperature and pressure control on the TPU raw material during the processing, so that the internal structure of the material is more uniform, and the performance stability is significantly improved. Under different environmental conditions, the mechanical properties and thermal properties of the TPU material change less, thereby enhancing its reliability in complex application environments;

[0022] The present invention adopts a die with a continuous serrated structure to realize the TPU step structure at the extrusion point, and the nanometer-level structural accuracy can meet the requirements for fine material structure in high-end fields such as microelectronics and nanotechnology;

[0023] The present invention processes the outer surface of the mold so that the outer surface is provided with a Teflon coating, so that the mold has good smoothness and demoulding performance, and prevents the TPU material from adhering to the mold during the molding process to affect the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of a TPU step structure produced according to the method of the present invention;

[0025] Figure 2 It is a schematic structural diagram of the mold used in the present invention. DETAILED DESCRIPTION

[0026] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] The specific steps of the TPU cast extrusion step structure neumi-grade production method are as follows:

[0029] Step 1, selecting TPU raw materials and processing the raw materials to make them have good fluidity and processability;

[0030] Step 2, adding the TPU raw material treated in step 1 into a high-precision cast extrusion device, heating it in a heating cavity of the extrusion device, and then using a die with a continuous serrated structure and extruding it at a specific pressure value, so that the TPU raw material gradually forms a stepped structure;

[0031] Step 3, cooling and solidifying the formed TPU step structure.

[0032] Specifically, the specific content of the principle processing in step 1 is: drying the TPU raw material at a temperature within 175°, and drying and discharging the moisture in the TPU raw material.

[0033] Specifically, in step 2, the temperature in the heating cavity of the extrusion equipment is set at 220° for constant temperature heating.

[0034] Specifically, in step 2, the specific pressure value is set at 3 MPa, and extrusion molding is performed at a pressure value of 3 MPa.

[0035] Furthermore, the mold in step 2 is chemically treated to form a Teflon coating on the outer surface of the mold, so that the mold has good smoothness and demoulding properties, preventing the TPU material from adhering to the mold during the molding process and affecting the product quality.

[0036] Specifically, the specific contents of the cooling and solidification process in step 3 are as follows:

[0037] 1) The newly formed TPU step structure is subjected to air cooling to reduce the temperature of the TPU step structure to 80°;

[0038] 2) The TPU step structure that has been subjected to uniform air cooling is subjected to water cooling to a temperature of 40°;

[0039] 3) The TPU step structure that has undergone water cooling is subjected to room temperature cooling to a room temperature stage.

[0040] Example 2

[0041] The specific steps of the TPU cast extrusion step structure neumi-grade production method are as follows:

[0042] Step 1, selecting TPU raw materials and processing the raw materials to make them have good fluidity and processability;

[0043] Step 2, adding the TPU raw material treated in step 1 into a high-precision cast extrusion device, heating it in a heating cavity of the extrusion device, and then using a die with a continuous serrated structure and extruding it at a specific pressure value, so that the TPU raw material gradually forms a stepped structure;

[0044] Step 3, cooling and solidifying the formed TPU step structure.

[0045] Specifically, the specific content of the principle processing in step 1 is: drying the TPU raw material at a temperature within 190°, and drying and discharging the moisture in the TPU raw material.

[0046] Specifically, in step 2, the temperature in the heating chamber of the extrusion equipment is set at 210° for constant temperature heating.

[0047] Specifically, in step 2, the specific pressure value is set at 4 MPa, and extrusion molding is performed at a pressure value of 4 MPa.

[0048] Furthermore, the mold in step 2 is chemically treated to form a Teflon coating on the outer surface of the mold, so that the mold has good smoothness and demoulding properties, preventing the TPU material from adhering to the mold during the molding process and affecting the product quality.

[0049] Specifically, the specific contents of the cooling and solidification process in step 3 are as follows:

[0050] 1) The newly formed TPU step structure is subjected to air cooling to reduce the temperature of the TPU step structure to 90°;

[0051] 2) The TPU step structure that has been subjected to uniform air cooling is subjected to water cooling to a temperature of 30°;

[0052] 3) The TPU step structure that has undergone water cooling is subjected to room temperature cooling to a room temperature stage.

[0053] Example 3

[0054] The specific steps of the TPU cast extrusion step structure neumi-grade production method are as follows:

[0055] Step 1, selecting TPU raw materials and processing the raw materials to make them have good fluidity and processability;

[0056] Step 2, adding the TPU raw material treated in step 1 into a high-precision cast extrusion device, heating it in a heating cavity of the extrusion device, and then using a die with a continuous serrated structure and extruding it at a specific pressure value, so that the TPU raw material gradually forms a stepped structure;

[0057] Step 3, cooling and solidifying the formed TPU step structure.

[0058] Specifically, the specific content of the principle processing in step 1 is: drying the TPU raw material at a temperature within 190°, and drying and discharging the moisture in the TPU raw material.

[0059] Specifically, in step 2, the temperature in the heating chamber of the extrusion equipment is set at 210° for constant temperature heating.

[0060] Specifically, in step 2, the specific pressure value is set at 4 MPa, and extrusion molding is performed at a pressure value of 4 MPa.

[0061] Furthermore, the mold in step 2 is chemically treated to form a Teflon coating on the outer surface of the mold, so that the mold has good smoothness and demoulding properties, preventing the TPU material from adhering to the mold during the molding process and affecting the product quality.

[0062] Specifically, the specific contents of the cooling and solidification process in step 3 are as follows:

[0063] 1) The newly formed TPU step structure is first subjected to extrusion curing treatment, a PET material layer is provided on the outer surface of the TPU step structure, and then air cooling treatment is performed to cool the TPU step structure to 90°;

[0064] 2) The TPU step structure that has been subjected to uniform air cooling is subjected to water cooling to a temperature of 30°;

[0065] 3) The TPU step structure that has been water-cooled is cooled to room temperature.

[0066] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. The method for making TPU cast extrusion ladder structure Newton level, the specific steps are as follows: Step 1, selecting TPU raw materials and processing the raw materials to make them have good fluidity and processability; Step 2, adding the TPU raw material treated in step 1 into a high-precision cast extrusion device, heating it in a heating cavity of the extrusion device, and then using a corresponding mold and extruding it at a specific pressure value, so that the TPU raw material gradually forms a stepped structure; Step 3, cooling and solidifying the formed TPU step structure.

2. The method for producing a TPU cast extrusion ladder structure according to claim 1, characterized in that The specific content of the principle processing in step 1 is: drying the TPU raw material at a temperature ranging from 175 to 190°, and drying and discharging the moisture in the TPU raw material.

3. The method for producing a TPU cast extrusion step structure nanometer-level according to claim 1, characterized in that In step 2, the temperature in the heating cavity of the extrusion equipment is set within the range of 210 to 220 degrees.

4. The method for producing a TPU cast extrusion step structure nanometer-level according to claim 1, characterized in that The specific pressure value in step 2 is set at 3-4 MPa.

5. The method for producing a TPU cast extrusion ladder structure according to claim 1, characterized in that The mold in step 2 is configured to have a continuous serrated structure.

6. The method for producing a TPU cast extrusion step structure nanometer-level according to claim 5, characterized in that The mold in step 2 is chemically treated to form a Teflon coating on the outer surface of the mold, so that the mold has good smoothness and demoulding performance, preventing the TPU material from adhering to the mold during the molding process and affecting the product quality.

7. The method for producing a TPU cast extrusion ladder structure according to claim 1, characterized in that The specific contents of the cooling and curing process in step 3 are as follows: 1) The newly formed TPU step structure is air-cooled. Since the TPU step structure is at a high temperature of 100 to 120°C, the temperature of the TPU step structure is cooled to 80 to 90°C by uniform cold air cooling. 2) The TPU step structure that has been subjected to uniform air cooling is subjected to water cooling to a temperature of 30-40°; 3) The TPU step structure that has undergone water cooling is subjected to room temperature cooling to a room temperature stage.

8. The method for producing a TPU cast extrusion ladder structure according to claim 7, characterized in that During the air cooling stage in step 3, the outer surface layer of the TPU step structure is subjected to an extrusion and fixing treatment, and a PET material layer is provided on the outer surface layer of the TPU step structure.

Images