Fiber reinforced composite material suitable for well lids of various types of urban pipe galleries and inspection wells and preparation method of fiber reinforced composite material

Abstract

The invention relates to the field of materials, and particularly discloses a fiber reinforced composite material suitable for well lids of various types of pipe galleries and inspection wells in cities and a preparation method of the fiber reinforced composite material. The raw materials comprise propylene glycol fumaric acid resin, glass fibers, polystyrene, styrene and the like. The preparation method comprises the following steps: coating a mixed material formed by the raw materials on the nylon bearing film to form the coating layer, and paving the glass fibers on the coating layer to form the fiber layer; and stacking at least two thin films with the coating layers and the fiber layers, and continuously rolling to form the fiber reinforced composite material with the alternate sandwich structure. The material has the multiple advantages of low carbon emission, high strength, light weight, super toughness, extreme temperature resistance, good wave transmission performance and the like, and the safety and intelligent level of urban infrastructures can be comprehensively improved.

Description

Technical Field

[0001] The present application relates to the field of material synthesis, and more specifically, to a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, and a preparation method thereof. Background Art

[0002] In the current urbanization process, the manhole covers of various pipe corridors and manholes in cities are mainly made of cast iron and cement steel bars. However, these traditional materials have many shortcomings in application. Although cast iron manhole covers have a certain durability, their high energy consumption, high carbon emission manufacturing process and potential negative impact on the environment cannot be ignored; at the same time, due to their high recycling value, they are often stolen, resulting in the loss of manhole covers, posing a serious threat to public safety; in addition, cast iron manhole covers are too heavy, which brings many inconveniences to installation, transportation and daily maintenance.

[0003] On the other hand, although cement and steel manhole covers have excellent load-bearing capacity, they are prone to wear after long-term use, resulting in a decrease in load-bearing capacity and posing a safety hazard; more importantly, these materials have a strong blocking effect on electromagnetic wave signals, which is not conducive to the signal transmission and reception of intelligent equipment inside the tunnel, and it is difficult to meet the development needs of modern urban informatization and intelligence.

[0004] In view of the limitations of the above materials in performance and application, as well as the urgent market demand for low-carbon, environmentally friendly, high-performance manhole cover materials, it is particularly urgent and important to develop a fiber-reinforced composite manhole cover suitable for various urban pipeline corridors and manholes. Summary of the invention

[0005] In order to solve the above problems, the present application provides a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, and a preparation method thereof.

[0006] This application adopts the following technical solutions:

[0007] In a first aspect, the present application provides a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, comprising:

[0008] 16-20 parts of propylene glycol fumaric acid resin, 15-20 parts of glass fiber, 1-5 parts of polystyrene, 5-10 parts of styrene, 0.1-0.5 parts of initiator, 0.3-0.7 parts of wetting and dispersing agent, 0.5-1 parts of release agent, 1-2 parts of UV color paste, 35-50 parts of aluminum hydroxide, 0.1-0.5 parts of anti-ultraviolet absorber, 0.4-1 parts of magnesium oxide paste;

[0009] The anti-ultraviolet absorber is a piperidine derivative type hindered amine light stabilizer;

[0010] The viscosity of UV color paste is less than 4000mPa.s, and the solid content is greater than 60%;

[0011] The content of magnesium oxide in the magnesium oxide paste is 65%, and the viscosity is less than 4000 mPa.s.

[0012] Furthermore, the piperidine derivative hindered amine light stabilizer is obtained by mixing (2,2,6,6-tetramethyl-4-hydroxypiperidinyl) benzoate and N′-bis(2,2,6,6-tetramethylpiperidinyl)hexanediamine in a mass ratio of 1:1.5-2.

[0013] Furthermore, the polystyrene is at least one of GPPS, HIPS and EPS.

[0014] Furthermore, the release agent is a copolymer of zinc stearate, calcium stearate and polysiloxane.

[0015] Furthermore, the particle size of the aluminum hydroxide is 300-1300 mesh.

[0016] Furthermore, the aluminum hydroxide is a mixture of one or more of 1250 mesh, 800 mesh, and 325 mesh.

[0017] In a second aspect, the present application provides a method for preparing the above-mentioned fiber-reinforced composite material for manhole covers, which comprises:

[0018] Step 1: mixing propylene glycol fumaric acid resin, polystyrene, styrene, an initiator and a wetting and dispersing agent to obtain a first mixed material;

[0019] Step 2: adding a release agent, aluminum hydroxide, an anti-ultraviolet absorber and a UV color paste to the first mixed material under stirring to obtain a second mixed material;

[0020] Step 3: adding magnesium oxide paste to the second mixed material, and stirring to form a third mixed material;

[0021] Step 4: coating the third mixed material on the nylon carrier film to form a coating layer, and then laying glass fibers on the coating layer to form a fiber layer;

[0022] Step 5: stack at least two films having coating layers and fiber layers, and continuously roll them to form a fiber-reinforced composite material having an alternating sandwich structure.

[0023] Furthermore, in the process of forming the second mixed material, the stirring rate is 2000-2400 rpm, and the stirring time is 30-40 min.

[0024] Furthermore, in the process of forming the second mixed material, the mixed material needs to be heated to 46-50°C.

[0025] In summary, this application has the following beneficial effects:

[0026] The fiber-reinforced composite material for manhole covers provided in the present application can be used to prepare manhole covers suitable for various types of urban pipeline corridors and manholes. The material must have multiple advantages such as low carbon emissions, high strength, light weight, high flame retardancy, corrosion resistance, super toughness, resistance to extreme temperatures and good wave transmission performance, and can comprehensively improve the safety and intelligence level of urban infrastructure.

[0027] In the technical solution, the use of modified fumaric acid resin, namely propylene glycol fumaric acid resin, can improve the weather resistance of the material, reduce the water absorption rate, and increase the electrical properties of the material; the use of piperidine derivative hindered amine light stabilizers and UV color pastes that meet specific parameters can improve the weather resistance of the material. DETAILED DESCRIPTION

[0028] The embodiments of the present invention will be described in detail below in conjunction with examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present invention and should not be construed as limiting the scope of the present invention. The specific conditions not specified in the examples are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used without indicating the manufacturer are all conventional products that can be purchased commercially.

[0029] The specific embodiments of the present invention are described in detail below. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] Example

[0031] Example 1

[0032] This embodiment provides a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, and the preparation method thereof includes:

[0033] (1) Prepare materials: 18 kg propylene glycol fumaric acid resin, 18 kg glass fiber, 4 kg polystyrene (GPPS and HIPS), 8 kg styrene, 0.3 kg initiator, 0.5 kg wetting and dispersing agent, 0.7 kg release agent (zinc stearate and polysiloxane copolymer), 1.5 kg UV color paste (viscosity less than 4000 mPa.s, solid content> 60%), 42 kg aluminum hydroxide, 0.3 kg anti-ultraviolet absorber, 0.7 kg magnesium oxide paste (magnesium oxide content of 65%, viscosity less than 4000 mPa.s);

[0034] The anti-ultraviolet absorber is obtained by mixing benzoic acid (2,2,6,6-tetramethyl-4-hydroxypiperidinyl) ester and N′-bis(2,2,6,6-tetramethylpiperidinyl) hexamethylenediamine in a mass ratio of 1:1.8.

[0035] (2) Propylene glycol fumaric acid resin and polystyrene, styrene, initiator and wetting dispersant are mixed and stirred to obtain a first mixed material; a release agent, aluminum hydroxide, anti-ultraviolet absorber and UV color paste are added to the first mixed material under stirring (stirring rate is 2200 rpm), and the mixture is stirred for 35 minutes. During the stirring process, the mixture needs to be heated to 48° C. to obtain a second mixed material; magnesium oxide paste is added to the second mixed material, and the third mixed material is formed after stirring.

[0036] (3) coating the third mixed material on a nylon carrier film to form a coating layer, and then laying the glass fiber on the coating layer to form a fiber layer; stacking two films having coating layers and fiber layers, and continuously rolling them to form a fiber-reinforced composite material with an alternating sandwich structure.

[0037] Example 2

[0038] This embodiment provides a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, and the preparation method thereof includes:

[0039] (1) Prepare materials: 16 kg propylene glycol fumaric acid resin, 20 kg glass fiber, 5 kg polystyrene (GPPS), 5 kg styrene, 0.5 kg initiator, 0.7 kg wetting and dispersing agent, 0.5 kg release agent (copolymer of calcium stearate and polysiloxane), 2 kg UV color paste (viscosity less than 4000 mPa.s, solid content> 60%), 35 kg aluminum hydroxide, 0.1 kg anti-ultraviolet absorber, 1 kg magnesium oxide paste (magnesium oxide content of 65%, viscosity less than 4000 mPa.s);

[0040] The anti-ultraviolet absorber is obtained by mixing benzoic acid (2,2,6,6-tetramethyl-4-hydroxypiperidinyl) ester and N′-bis(2,2,6,6-tetramethylpiperidinyl) hexamethylenediamine in a mass ratio of 1:1.8.

[0041] (2) Propylene glycol fumaric acid resin and polystyrene, styrene, initiator and wetting dispersant are mixed and stirred to obtain a first mixed material; a release agent, aluminum hydroxide, anti-ultraviolet absorber and UV color paste are added to the first mixed material under stirring (stirring rate is 2000 revolutions per minute), and the mixture is stirred for 40 minutes. During the stirring process, the mixture needs to be heated to 46° C. to obtain a second mixed material; magnesium oxide paste is added to the second mixed material, and the mixture is stirred to form a third mixed material.

[0042] (3) coating the third mixed material on a nylon carrier film to form a coating layer, and then laying the glass fiber on the coating layer to form a fiber layer; stacking two films having coating layers and fiber layers, and continuously rolling them to form a fiber-reinforced composite material with an alternating sandwich structure.

[0043] Example 3

[0044] This embodiment provides a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, and the preparation method thereof includes:

[0045] (1) Prepare materials: 20 kg propylene glycol fumaric acid resin, 15 kg glass fiber, 1 kg polystyrene (EPS), 10 kg styrene, 0.1 kg initiator, 0.3 kg wetting and dispersing agent, 1 kg release agent (copolymer of zinc stearate, calcium stearate and polysiloxane), 1 kg UV color paste (viscosity less than 4000 mPa.s, solid content> 60%), 50 kg aluminum hydroxide, 0.5 kg anti-ultraviolet absorber, 0.4 kg magnesium oxide paste (magnesium oxide content of 65%, viscosity less than 4000 mPa.s);

[0046] The anti-ultraviolet absorber is obtained by mixing benzoic acid (2,2,6,6-tetramethyl-4-hydroxypiperidinyl) ester and N′-bis(2,2,6,6-tetramethylpiperidinyl) hexamethylenediamine in a mass ratio of 1:1.8.

[0047] (2) Propylene glycol fumaric acid resin and polystyrene, styrene, initiator and wetting dispersant are mixed and stirred to obtain a first mixed material; a release agent, aluminum hydroxide, anti-ultraviolet absorber and UV color paste are added to the first mixed material under stirring (stirring rate is 2400 rpm), and the mixture is stirred for 30 minutes. During the stirring process, the mixture needs to be heated to 50° C. to obtain a second mixed material; magnesium oxide paste is added to the second mixed material, and the third mixed material is formed after stirring.

[0048] (3) coating the third mixed material on a nylon carrier film to form a coating layer, and then laying the glass fiber on the coating layer to form a fiber layer; stacking two films having coating layers and fiber layers, and continuously rolling them to form a fiber-reinforced composite material with an alternating sandwich structure.

[0049] Example 4

[0050] This embodiment provides a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, and the preparation method thereof includes:

[0051] (1) Prepare materials: 19 kg propylene glycol fumaric acid resin, 16 kg glass fiber, 4 kg polystyrene (HIPS), 8 kg styrene, 0.2 kg initiator, 0.6 kg wetting and dispersing agent, 0.8 kg release agent (copolymer of calcium stearate and polysiloxane), 1.7 kg UV color paste (viscosity less than 4000 mPa.s, solid content> 60%), 39 kg aluminum hydroxide, 0.4 kg anti-ultraviolet absorber, 0.8 kg magnesium oxide paste (magnesium oxide content of 65%, viscosity less than 4000 mPa.s);

[0052] The anti-ultraviolet absorber is obtained by mixing benzoic acid (2,2,6,6-tetramethyl-4-hydroxypiperidinyl) ester and N′-bis(2,2,6,6-tetramethylpiperidinyl) hexamethylenediamine in a mass ratio of 1:1.5.

[0053] (2) Propylene glycol fumaric acid resin and polystyrene, styrene, initiator and wetting dispersant are mixed and stirred to obtain a first mixed material; a release agent, aluminum hydroxide, anti-ultraviolet absorber and UV color paste are added to the first mixed material under stirring (stirring rate is 2300 rpm), and the mixture is stirred for 38 minutes. During the stirring process, the mixture needs to be heated to 47° C. to obtain a second mixed material; magnesium oxide paste is added to the second mixed material, and the mixture is stirred to form a third mixed material.

[0054] (3) coating the third mixed material on a nylon carrier film to form a coating layer, and then laying the glass fiber on the coating layer to form a fiber layer; stacking two films having coating layers and fiber layers, and continuously rolling them to form a fiber-reinforced composite material with an alternating sandwich structure.

[0055] Example 5

[0056] This embodiment provides a fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, and the preparation method thereof includes:

[0057] (2) Preparation of materials: 19 kg propylene glycol fumaric acid resin, 16 kg glass fiber, 4 kg polystyrene (GPPS, HIPS and EPS are mixed in a mass ratio of 1:1:1), 8 kg styrene, 0.2 kg initiator, 0.6 kg wetting and dispersing agent, 0.8 kg release agent (copolymer of calcium stearate and polysiloxane), 1.7 kg UV color paste (viscosity less than 4000 mPa.s, solid content> 65%), 39 kg aluminum hydroxide, 0.4 kg anti-ultraviolet absorber, 0.8 kg magnesium oxide paste (magnesium oxide content is 65%, viscosity less than 4000 mPa.s);

[0058] The anti-ultraviolet absorber is obtained by mixing benzoic acid (2,2,6,6-tetramethyl-4-hydroxypiperidinyl) ester and N′-bis(2,2,6,6-tetramethylpiperidinyl) hexamethylenediamine in a mass ratio of 1:1.5.

[0059] (2) Propylene glycol fumaric acid resin and polystyrene, styrene, initiator and wetting dispersant are mixed and stirred to obtain a first mixed material; a release agent, aluminum hydroxide, anti-ultraviolet absorber and UV color paste are added to the first mixed material under stirring (stirring rate is 2100 rpm), and the mixture is stirred for 32 minutes. During the stirring process, the mixture needs to be heated to 48° C. to obtain a second mixed material; magnesium oxide paste is added to the second mixed material, and the mixture is stirred to form a third mixed material.

[0060] (3) coating the third mixed material on a nylon carrier film to form a coating layer, and then laying the glass fiber on the coating layer to form a fiber layer; stacking two films having coating layers and fiber layers, and continuously rolling them to form a fiber-reinforced composite material with an alternating sandwich structure.

[0061] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A fiber-reinforced composite material for manhole covers suitable for various types of urban pipe galleries and manholes, characterized in that: It includes: 16-20 parts of propylene glycol fumaric acid resin, 15-20 parts of glass fiber, 1-5 parts of polystyrene, 5-10 parts of styrene, 0.1-0.5 parts of initiator, 0.3-0.7 parts of wetting and dispersing agent, 0.5-1 parts of release agent, 1-2 parts of UV color paste, 35-50 parts of aluminum hydroxide, 0.1-0.5 parts of anti-ultraviolet absorber, 0.4-1 parts of magnesium oxide paste; The anti-ultraviolet absorber is a piperidine derivative hindered amine light stabilizer; The viscosity of the UV color paste is less than 4000mPa.s, and the solid content is greater than 60%; The magnesium oxide paste has a magnesium oxide content of 65% and a viscosity of less than 4000 mPa.s.

2. The fiber-reinforced composite material for manhole covers according to claim 1, characterized in that: The piperidine derivative hindered amine light stabilizer is obtained by mixing (2,2,6,6-tetramethyl-4-hydroxypiperidinyl) benzoate and N′-bis(2,2,6,6-tetramethylpiperidinyl)hexanediamine in a mass ratio of 1:1.5-2.

3. The fiber-reinforced composite material for manhole covers according to claim 1, characterized in that: The polystyrene is at least one of GPPS, HIPS and EPS.

4. The fiber-reinforced composite material for manhole covers according to claim 1, characterized in that: The release agent is a copolymer of zinc stearate, calcium stearate and polysiloxane.

5. The fiber-reinforced composite material for manhole covers according to claim 1, characterized in that: The particle size of the aluminum hydroxide is 300-1300 meshes.

6. The fiber-reinforced composite material for manhole covers according to claim 5, characterized in that: The aluminum hydroxide is a mixture of one or more of 1250 mesh, 800 mesh, and 325 mesh.

7. A method for preparing a fiber-reinforced composite material for a manhole cover according to any one of claims 1 to 6, characterized in that: It includes: The propylene glycol fumaric acid resin, polystyrene, styrene, an initiator and a wetting and dispersing agent are mixed and stirred to obtain a first mixed material; Adding a release agent, aluminum hydroxide, an anti-ultraviolet absorber and a UV color paste to the first mixed material under stirring to obtain a second mixed material; adding magnesium oxide paste to the second mixed material, and stirring to form a third mixed material; Applying the third mixed material on a nylon carrier film to form a coating layer, and laying the glass fiber on the coating layer to form a fiber layer; At least two films with coating layers and fiber layers are stacked and continuously rolled to form a fiber-reinforced composite material with an alternating sandwich structure.

8. The method for preparing a fiber-reinforced composite material for a manhole cover according to claim 7, characterized in that: During the process of forming the second mixed material, the stirring rate is 2000-2400 rpm and the stirring time is 30-40 min.

9. The method for preparing a fiber-reinforced composite material for a manhole cover according to claim 8, characterized in that: In the process of forming the second mixed material, the mixed material needs to be heated to 46-50°C.