A high-temperature-resistant composite inner liner drum and a preparation method thereof

Abstract

The application relates to the technical field of plastic processing, and discloses a high-temperature-resistant composite inner lining barrel and a preparation method thereof, wherein the high-temperature-resistant composite inner lining barrel comprises a base layer and a high-temperature-resistant layer arranged in sequence from inside to outside; the base layer comprises the following components in parts by weight: 40-90 parts of polypropylene, 15-20 parts of oxidized polyethylene wax, 15-20 parts of ethylene-vinyl alcohol copolymer and 0.2-0.4 parts of a first antioxidant; and the high-temperature-resistant layer comprises the following components in parts by weight: 20-30 parts of polyethylene, 10-20 parts of polymethyl methacrylate, 10-20 parts of aluminum titanate and 0.1-0.2 parts of a second antioxidant. Through the technical scheme, the problem of poor high-temperature resistance of the inner lining barrel in the prior art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of plastic processing, in particular to a high-temperature-resistant composite inner lining barrel and a preparation method thereof. BACKGROUND

[0002] The inner lining barrel is developed from the traditional cylinder or box type inner packaging bag, is generally sleeved in the raw material barrel, and is used for containing liquid raw materials in the chemical industry, pesticide industry, pharmaceutical industry, food industry, hardware and electronic industry. Compared with the raw material barrel, the inner lining barrel can not only reduce the use cost, save resources and reduce the environmental protection pressure, but also has the effects of moisture-proof, oxygen-blocking and corrosion-resistant, and can provide good protection for the liquid raw materials.

[0003] The existing inner lining barrel is mostly made of polyethylene, which leads to poor high-temperature resistance of the inner lining barrel. With the development of industrial production, the use environment puts forward higher requirements for the high-temperature resistance of the inner lining barrel. At present, the research on the inner lining barrel is mostly focused on the anti-static performance, and the research on the high-temperature resistance of the inner lining barrel is very little. Therefore, it is of great significance to develop a high-temperature-resistant composite inner lining barrel. SUMMARY

[0004] The present application provides a high-temperature-resistant composite inner lining barrel and a preparation method thereof, which solves the problem of poor high-temperature resistance of the inner lining barrel in the related art.

[0005] The technical scheme of the present application is as follows:

[0006] The present application provides a high-temperature-resistant composite inner lining barrel, which comprises a base layer and a high-temperature-resistant layer arranged in sequence from inside to outside.

[0007] The base layer comprises the following components in parts by weight: polypropylene 30-90 parts, oxidized polyethylene wax 15-20 parts, ethylene-vinyl alcohol copolymer 15-20 parts, and first antioxidant 0.2-0.4 parts.

[0008] The high-temperature-resistant layer comprises the following components in parts by weight: polyethylene 20-30 parts, polymethyl methacrylate 10-20 parts, aluminum titanate 10-20 parts, and second antioxidant 0.1-0.2 parts.

[0009] As a further technical scheme, the mass ratio of the polypropylene, the oxidized polyethylene wax and the ethylene-vinyl alcohol copolymer is 3-4:1:1.

[0010] As a further technical scheme, the aluminum titanate is ethylene-vinyl acetate copolymer modified aluminum titanate, and the preparation method of the ethylene-vinyl acetate copolymer modified aluminum titanate is as follows: ethylene-vinyl acetate copolymer is dissolved in tetrahydrofuran, aluminum titanate is added, uniformly dispersed, concentrated and solidified, and then broken and pulverized to obtain the ethylene-vinyl acetate copolymer modified aluminum titanate.

[0011] As a further technical solution, the mass ratio of the aluminum titanate and the ethylene-vinyl acetate copolymer is 3:2 to 4:1.

[0012] As a further technical solution, the mass fraction of vinyl acetate in the ethylene-vinyl acetate copolymer is 28% to 32%.

[0013] As a further technical solution, the first antioxidant and the second antioxidant are each independently one or more of antioxidant 1010, antioxidant 1076, and antioxidant 164.

[0014] The application also proposes a preparation method of the high-temperature-resistant composite inner lining drum, comprising the following steps:

[0015] S1, uniformly mixing polypropylene, oxidized polyethylene wax, ethylene-vinyl alcohol copolymer, and a first antioxidant, first extrusion molding to obtain a base layer sheet;

[0016] S2, uniformly mixing polyethylene, polymethyl methacrylate, aluminum titanate, and a second antioxidant, second extrusion molding to obtain a high-temperature-resistant layer sheet;

[0017] S3, laminating the base layer sheet and the high-temperature-resistant layer sheet, hot pressing to form a composite inner lining drum sheet, and stamping the composite inner lining drum sheet to obtain a high-temperature-resistant composite inner lining drum.

[0018] As a further technical solution, in step S1, when the first extrusion molding is performed, the extrusion temperature is 200 to 220 DEG C.

[0019] As a further technical solution, in step S2, when the second extrusion molding is performed, the extrusion temperature is 180 to 200 DEG C.

[0020] As a further technical solution, in step S3, when the hot pressing is performed, the temperature is 180 to 200 DEG C, the pressure is 3 to 4 MPa, and the time is 0.5 to 1 h.

[0021] The working principle and beneficial effects of the application are as follows:

[0022] 1. In the application, the high-temperature-resistant composite inner lining drum comprises a base layer and a high-temperature-resistant layer. The use of polypropylene, oxidized polyethylene wax, and ethylene-vinyl alcohol copolymer in the base layer improves the room temperature tensile strength of the composite inner lining drum and improves the thermal stability of the composite inner lining drum, thereby improving the load deformation temperature thereof. In addition, the addition of aluminum titanate in the high-temperature-resistant layer effectively hinders the transfer of heat, thereby improving the load deformation temperature of the composite inner lining drum.

[0023] 2. In this invention, when the mass ratio of polypropylene to oxidized polyethylene wax and ethylene-vinyl alcohol copolymer in the matrix layer is 3~4:1:1, the room temperature tensile strength and load deformation temperature of the composite inner lining barrel can be further enhanced.

[0024] 3. In this invention, aluminum titanate is modified by ethylene-vinyl acetate copolymer, which not only enhances the compatibility of aluminum titanate with polyethylene and polymethyl methacrylate, further improves the load deformation temperature of the composite inner lining barrel, but also promotes the tight bonding between the matrix layer and the high-temperature resistant layer, thereby further improving the room temperature tensile strength of the composite inner lining barrel.

[0025] 4. In this invention, when the mass ratio of aluminum titanate to ethylene-vinyl acetate copolymer is 3:2 to 4:1, the load deformation temperature of the composite liner can be further increased. When the mass fraction of vinyl acetate in the ethylene-vinyl acetate copolymer is 28% to 32%, it helps to further improve the room temperature tensile strength and load deformation temperature of the composite liner. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise specified, in the following examples and comparative examples, polypropylene was purchased from Suzhou Shengkanghong Plastics Co., Ltd., model M800E; oxidized polyethylene wax was purchased from Hefei Qihong Polymer Materials Co., Ltd., model D1012; ethylene-vinyl alcohol copolymer was purchased from Dongguan Baojia Plastics Co., Ltd., model H171B; polyethylene was purchased from Suzhou Wenge Plastics Co., Ltd., model DFDA-7042; polymethyl methacrylate was purchased from Dongguan Guojia Plastics Co., Ltd., model MF001; aluminum titanate was purchased from Kunshan Shengan Biotechnology Co., Ltd., model D1UL; and antioxidant 1010 was purchased from Qingdao Jiedejia New Material Technology Co., Ltd.

[0028] Example 1

[0029] A method for preparing a high-temperature resistant composite liner barrel includes the following steps:

[0030] S1. By weight, 30 parts of polypropylene, 15 parts of oxidized polyethylene wax, 15 parts of ethylene-vinyl alcohol copolymer and 0.2 parts of antioxidant 1010 are mixed evenly and extruded at 200°C to obtain a matrix layer sheet.

[0031] S2, by weight parts, 20 parts of polyethylene, 10 parts of polymethyl methacrylate, 10 parts of aluminum titanate and 0.1 parts of antioxidant 1010 are uniformly mixed, extruded into a sheet at 180 DEG C by an extruder, and a high-temperature-resistant layer sheet is obtained;

[0032] S3, the base layer sheet and the high-temperature-resistant layer sheet are laminated and hot-pressed to form a composite inner lining barrel sheet, and the composite inner lining barrel sheet is punched by a die to obtain a high-temperature-resistant composite inner lining barrel, wherein the hot-pressing is performed at a temperature of 180 DEG C, a pressure of 3 MPa and for 0.5 h.

[0033] Example 2

[0034] A preparation method of a high-temperature-resistant composite inner lining barrel comprises the following steps:

[0035] S1, by weight parts, 90 parts of polypropylene, 20 parts of oxidized polyethylene wax, 20 parts of ethylene-vinyl alcohol copolymer and 0.4 parts of antioxidant 1010 are uniformly mixed, extruded into a sheet at 220 DEG C by an extruder, and a base layer sheet is obtained;

[0036] S2, by weight parts, 30 parts of polyethylene, 20 parts of polymethyl methacrylate, 20 parts of aluminum titanate and 0.2 parts of antioxidant 1010 are uniformly mixed, extruded into a sheet at 200 DEG C by an extruder, and a high-temperature-resistant layer sheet is obtained;

[0037] S3, the base layer sheet and the high-temperature-resistant layer sheet are laminated and hot-pressed to form a composite inner lining barrel sheet, and the composite inner lining barrel sheet is punched by a die to obtain a high-temperature-resistant composite inner lining barrel, wherein the hot-pressing is performed at a temperature of 200 DEG C, a pressure of 4 MPa and for 1 h.

[0038] Example 3

[0039] S1, by weight parts, 45 parts of polypropylene, 15 parts of oxidized polyethylene wax, 15 parts of ethylene-vinyl alcohol copolymer and 0.2 parts of antioxidant 1010 are uniformly mixed, extruded into a sheet at 200 DEG C by an extruder, and a base layer sheet is obtained;

[0040] S2, by weight parts, 20 parts of polyethylene, 10 parts of polymethyl methacrylate, 10 parts of aluminum titanate and 0.1 parts of antioxidant 1010 are uniformly mixed, extruded into a sheet at 180 DEG C by an extruder, and a high-temperature-resistant layer sheet is obtained;

[0041] S3, the base layer sheet and the high-temperature-resistant layer sheet are laminated and hot-pressed to form a composite inner lining barrel sheet, and the composite inner lining barrel sheet is punched by a die to obtain a high-temperature-resistant composite inner lining barrel, wherein the hot-pressing is performed at a temperature of 180 DEG C, a pressure of 3 MPa and for 0.5 h.

[0042] Example 4

[0043] A preparation method of a high-temperature-resistant composite inner lining barrel, comprising the following steps:

[0044] S1, 80 parts of polypropylene, 20 parts of oxidized polyethylene wax, 20 parts of ethylene-vinyl alcohol copolymer and 0.4 parts of antioxidant 1010 are mixed uniformly, and are extruded into a matrix layer sheet at 220℃ through an extruder;

[0045] S2, 30 parts of polyethylene, 20 parts of polymethyl methacrylate, 20 parts of aluminum titanate and 0.2 parts of antioxidant 1010 are mixed uniformly, and are extruded into a high-temperature-resistant layer sheet at 200℃ through an extruder;

[0046] S3, the matrix layer sheet and the high-temperature-resistant layer sheet are laminated and hot-pressed to form a composite inner lining barrel sheet, and the composite inner lining barrel sheet is punched through a mold to obtain a high-temperature-resistant composite inner lining barrel, wherein the hot-pressing is performed at a temperature of 200℃, a pressure of 4MPa and for 1h.

[0047] Example 5

[0048] The difference between this embodiment and example 4 is that in step S2 of this embodiment, the aluminum titanate is ethylene-vinyl acetate copolymer modified aluminum titanate;

[0049] The preparation method of the ethylene-vinyl acetate copolymer modified aluminum titanate is as follows: 10 parts of ethylene-vinyl acetate copolymer (purchased from Arald Biological Technology Co., Ltd., product number P101484, mass fraction of vinyl acetate is 25%) is dissolved in 10 parts of tetrahydrofuran, 10 parts of aluminum titanate is added and uniformly dispersed by ultrasonic, concentrated and solidified, and then broken, pulverized and ground to obtain ethylene-vinyl acetate copolymer modified aluminum titanate.

[0050] Example 6

[0051] The difference between this embodiment and example 4 is that in step S2 of this embodiment, the aluminum titanate is ethylene-vinyl acetate copolymer modified aluminum titanate;

[0052] The preparation method of the ethylene-vinyl acetate copolymer modified aluminum titanate is as follows: 2 parts of ethylene-vinyl acetate copolymer (purchased from Arald Biological Technology Co., Ltd., product number P101484, mass fraction of vinyl acetate is 25%) is dissolved in 2 parts of tetrahydrofuran, 18 parts of aluminum titanate is added and uniformly dispersed by ultrasonic, concentrated and solidified, and then broken, pulverized and ground to obtain ethylene-vinyl acetate copolymer modified aluminum titanate.

[0053] Example 7

[0054] The difference between this embodiment and example 4 is that in step S2 of this embodiment, the aluminum titanate is ethylene-vinyl acetate copolymer modified aluminum titanate;

[0055] The preparation method of the ethylene-vinyl acetate copolymer modified aluminum titanate is as follows: 8 parts of ethylene-vinyl acetate copolymer (purchased from Aladdin Biochemical Technology Co., Ltd., with the product number P101484, and the mass fraction of vinyl acetate being 25%) is dissolved in 8 parts of tetrahydrofuran, 12 parts of aluminum titanate is added, ultrasonic dispersion is performed until uniform, concentration and solidification are performed, and crushing and pulverization are performed to obtain ethylene-vinyl acetate copolymer modified aluminum titanate.

[0056] Example 8

[0057] The difference between this example and Example 4 is that, in step S2 of this example, the aluminum titanate is ethylene-vinyl acetate copolymer modified aluminum titanate.

[0058] The preparation method of the ethylene-vinyl acetate copolymer modified aluminum titanate is as follows: 4 parts of ethylene-vinyl acetate copolymer (purchased from Aladdin Biochemical Technology Co., Ltd., with the product number P101484, and the mass fraction of vinyl acetate being 25%) is dissolved in 4 parts of tetrahydrofuran, 16 parts of aluminum titanate is added, ultrasonic dispersion is performed until uniform, concentration and solidification are performed, and crushing and pulverization are performed to obtain ethylene-vinyl acetate copolymer modified aluminum titanate.

[0059] Example 9

[0060] The difference between this example and Example 8 is that, in the preparation of the ethylene-vinyl acetate copolymer modified aluminum titanate in this example, the mass fraction of vinyl acetate in the ethylene-vinyl acetate copolymer is 40% (purchased from Aladdin Biochemical Technology Co., Ltd., with the product number P101486).

[0061] Example 10

[0062] The difference between this example and Example 8 is that, in the preparation of the ethylene-vinyl acetate copolymer modified aluminum titanate in this example, the mass fraction of vinyl acetate in the ethylene-vinyl acetate copolymer is 28% (purchased from Aladdin Biochemical Technology Co., Ltd., with the product number P489072).

[0063] Example 11

[0064] The difference between this example and Example 8 is that, in the preparation of the ethylene-vinyl acetate copolymer modified aluminum titanate in this example, the mass fraction of vinyl acetate in the ethylene-vinyl acetate copolymer is 32% (purchased from Aladdin Biochemical Technology Co., Ltd., with the product number P101485).

[0065] Comparative Example 1

[0066] The difference between this comparative example and Example 1 is that, in step S1 of this comparative example, no oxidized polyethylene wax is added, the weight fraction of the polypropylene is 51 parts, and the weight fraction of the ethylene-vinyl alcohol copolymer is 19 parts.

[0067] Comparative Example 2

[0068] The difference between this comparative example and Example 1 is that no ethylene-vinyl alcohol copolymer is added in step S1 of this comparative example, the weight fraction of polypropylene is 51 parts, and the weight fraction of oxidized polyethylene wax is 19 parts.

[0069] Comparative Example 3

[0070] The difference between this comparative example and Example 1 is that no aluminum titanate is added in step S2 of this comparative example.

[0071] Experimental Example 1 Tensile strength at room temperature of composite inner liner drum

[0072] According to GB / T 1040.2-2022 “Determination of tensile properties of plastics-Part 2: test conditions for moulded and extruded plastics”, the composite inner liner drum sheet obtained in the examples and comparative examples is made into 1B type sample, and the tensile strength at room temperature of the composite inner liner drum is measured at a test speed of 0.5 mm / min. The test results are shown in Table 1 below.

[0073] Table 1 Tensile strength at room temperature of composite inner liner drum

[0074]

[0075] Comparative Examples 1-2 and Example 1 show that the synergistic effect of polypropylene, oxidized polyethylene wax and ethylene-vinyl alcohol copolymer improves the tensile strength at room temperature of the composite inner liner drum. Comparative Examples 3-4 and Examples 1-2 show that when the mass ratio of polypropylene to oxidized polyethylene wax and ethylene-vinyl alcohol copolymer is 3-4:1:1, the tensile strength at room temperature of the composite inner liner drum can be further improved. Comparative Examples 4 and Examples 5-11 show that the modification of aluminum titanate by ethylene-vinyl acetate copolymer helps to further improve the tensile strength at room temperature of the composite inner liner drum. Comparative Examples 8-9 and Examples 10-11 show that when the mass fraction of vinyl acetate in ethylene-vinyl acetate copolymer is 28%-32%, the tensile strength at room temperature of the composite inner liner drum can be further improved.

[0076] Experimental Example 2 Load deflection temperature of composite inner liner drum

[0077] According to GB / T 1634.2-2019 “Determination of load deflection temperature of plastics-Part 2: plastics and hard rubber”, the composite inner liner drum obtained in the examples and comparative examples is made into 80mm×10mm×4mm sample, and the load deflection temperature of the composite inner liner drum is measured under a load of 1.80MPa. The test results are shown in Table 2 below.

[0078] Table 2 Load deflection temperature of composite inner liner drum

[0079]

[0080] The comparison of the embodiment 1 and the comparative examples 1-2 shows that the polypropylene, the oxidized polyethylene wax and the ethylene-vinyl alcohol copolymer synergistically improve the load deformation temperature of the composite inner liner drum. The comparison of the embodiment 3-4 and the embodiment 1-2 shows that when the mass ratio of the polypropylene, the oxidized polyethylene wax and the ethylene-vinyl alcohol copolymer is 3-4:1:1, the load deformation temperature of the composite inner liner drum can be further improved. The comparison of the embodiment 4 and the embodiment 5-11 shows that the modification of the aluminum titanate by the ethylene-vinyl acetate copolymer helps to further improve the load deformation temperature of the composite inner liner drum. The comparison of the embodiment 5-6 and the embodiment 7-8 shows that when the mass ratio of the aluminum titanate and the ethylene-vinyl acetate copolymer is 3:2-4:1, the load deformation temperature of the composite inner liner drum can be further improved. The comparison of the embodiment 8-9 and the embodiment 10-11 shows that when the mass fraction of the vinyl acetate in the ethylene-vinyl acetate copolymer is 28%-32%, the load deformation temperature of the composite inner liner drum can be further improved.

[0081] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high temperature resistant composite-lined drum characterized by, The base layer and the high-temperature-resistant layer are sequentially arranged from inside to outside. The base layer comprises the following components in parts by weight: 30-90 parts of polypropylene, 15-20 parts of oxidized polyethylene wax, 15-20 parts of ethylene-vinyl alcohol copolymer, and 0.2-0.4 parts of a first antioxidant. The high-temperature-resistant layer comprises the following components in parts by weight: 20-30 parts of polyethylene, 10-20 parts of polymethyl methacrylate, 10-20 parts of ethylene-vinyl acetate copolymer modified aluminum titanate, and 0.1-0.2 parts of a second antioxidant. The preparation method of the ethylene-vinyl acetate copolymer modified aluminum titanate comprises the following steps: dissolving ethylene-vinyl acetate copolymer in tetrahydrofuran, adding aluminum titanate, uniformly dispersing, concentrating and solidifying, and crushing and grinding to obtain the ethylene-vinyl acetate copolymer modified aluminum titanate. The mass ratio of the aluminum titanate to the ethylene-vinyl acetate copolymer is 3:2-4:1, and the mass fraction of vinyl acetate in the ethylene-vinyl acetate copolymer is 28%-32%.

2. A high temperature resistant composite-lined drum according to claim 1, wherein, The mass ratio of the polypropylene to the oxidized polyethylene wax and the ethylene-vinyl alcohol copolymer is 3-4:1:

1.

3. The high temperature resistant composite-lined drum according to claim 1, wherein, The first antioxidant and the second antioxidant are each independently one or more of antioxidant 1010, antioxidant 1076, and antioxidant 164.

4. A method of producing a high temperature resistant composite inner liner drum according to any one of claims 1 to 3, characterized in that, The method comprises the following steps: S1, uniformly mixing polypropylene, oxidized polyethylene wax, ethylene-vinyl alcohol copolymer, and a first antioxidant, and first extruding to obtain a base layer sheet; S2, uniformly mixing polyethylene, polymethyl methacrylate, ethylene-vinyl acetate copolymer modified aluminum titanate, and a second antioxidant, and second extruding to obtain a high-temperature-resistant layer sheet; S3, laminating the base layer sheet and the high-temperature-resistant layer sheet, hot pressing to form a composite inner lining barrel sheet, and stamping the composite inner lining barrel sheet to obtain a high-temperature-resistant composite inner lining barrel.

5. The method for preparing a high-temperature resistant composite liner barrel according to claim 4, characterized in that, In step S1, the extrusion temperature is 200-220°C during the first extruding.

6. The method for preparing a high-temperature resistant composite liner barrel according to claim 4, characterized in that, In step S2, the extrusion temperature is 180-200°C during the second extruding.

7. The method for preparing a high-temperature resistant composite liner barrel according to claim 4, characterized in that, In step S3, the temperature is 180-200°C, the pressure is 3-4 MPa, and the time is 0.5-1 h during the hot pressing.

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