Scratch-resistant low-speed cracking PE fuel gas pipe and preparation method thereof

Abstract

The invention provides a scratch-resistant low-speed cracking PE fuel gas pipe and a preparation method thereof, and belongs to the technical field of conveying pipes. The scratch-resistant low-speedcracking PE fuel gas pipe comprises a main body structure layer and a protecting layer. The main body structure layer is a PE material, and the protecting layer is a crosslinking material. A thicknessof the main body structure layer is greater than a thickness of the protecting layer. The scratch-resistant low-speed cracking PE fuel gas pipe is capable of increasing properties of wear resistance,scratch resistance, low-speed cracking and the like of the PE fuel gas pipe, keeping all advantages of the original PE fuel gas pipe, prolonging the service life of the PE fuel gas pipe, and avoidinga safety accident.

Description

technical field

[0001] The invention belongs to the technical field of transportation pipelines, in particular to a scratch-resistant slow-cracking PE gas pipeline and a preparation method thereof. Background technique

[0002] The existing PE gas pipeline has a single-layer structure. At the installation and construction site, it is inevitable that the pipe will be scratched with the sand and gravel on the ground during the handling project, and the surface is prone to scratches. The wall thickness of the damaged part becomes thinner. It is easy to be damaged at the scratched part in the medium, which will lead to the occurrence of the burst tube.

[0003] Therefore, it is necessary to improve its scratch and slow cracking resistance. Contents of the invention

[0004] The purpose of the present invention is to provide an anti-scratch slow cracking PE gas pipeline, which can solve the problem that the above-mentioned gas pipeline is prone to scratches. Another purpose of...

Examples

Embodiment 1

[0038] A protective layer for gas pipelines, the composition and the specific weight of each composition are: 90 parts of heat-resistant polyethylene, 0.5 part of polysiloxane, 0.5 part of silane crosslinking agent, 0.1 part of graphene, 1 part of polyamide, disulfide 0.5 part of molybdenum, 1 part of glass fiber and carbon fiber composition, 0.5 part of maleic anhydride graft copolymer, and the thickness of the protective layer is 0.5 mm.

[0039] The mass ratio of the glass fiber and carbon fiber composition is: 1 part of glass fiber and 1 part of carbon fiber.

[0040] The preparation method of the above gas pipeline protective layer comprises the following steps:

[0041] S1. Mixing: Mix the above materials evenly at 50°C, and the mixing time is 3 minutes;

[0042] S2. Cooling: After the mixing is completed, cool to 28°C and set aside;

[0043] S3. Production of protective layer: add the material cooled in step S2 into the extruder, the temperature of the extruder is set...

Embodiment 2

[0045] A protective layer for a gas pipeline, the composition and the specific weight of each composition are: 100 parts of heat-resistant polyethylene, 5 parts of polysiloxane, 3 parts of silane crosslinking agent, 3 parts of graphene, 7 parts of polyamide, disulfide 5 parts of molybdenum, 6 parts of glass fiber and aromatic polyamide fiber composition, 5 parts of maleic anhydride graft copolymer, and the thickness of the protective layer is 3 mm.

[0046] The mass ratio of the composition of glass fiber and aromatic polyamide fiber is: 1 part of glass fiber and 1 part of aromatic polyamide fiber.

[0047] The preparation method of the above gas pipeline protective layer comprises the following steps:

[0048] S1. Mixing: Mix the above materials evenly at 65°C, and the mixing time is 6 minutes;

[0049] S2. Cooling: After the mixing is completed, cool to 29°C and set aside;

[0050] S3. Production of protective layer: Add the material cooled in step S2 into the extruder, se...

Embodiment 3

[0052] A protective layer for gas pipelines, the composition and the specific weight of each composition are: 110 parts of heat-resistant polyethylene, 10 parts of polysiloxane, 5 parts of silane crosslinking agent, 5 parts of graphene, 15 parts of polyamide, disulfide 10 parts of molybdenum, 10 parts of carbon fiber and aromatic polyamide fiber composition, 10 parts of maleic anhydride graft copolymer, and the thickness of the protective layer is 2 mm.

[0053] The mass ratio of the carbon fiber and aramid fiber composition is: 1 part of carbon fiber and 1 part of aramid fiber.

[0054] The preparation method of the above gas pipeline protective layer comprises the following steps:

[0055] S1. Mixing: Mix the above materials evenly at 80°C, and the mixing time is 10 minutes;

[0056] S2. Cooling: After the mixing is completed, cool to 30°C and set aside;

[0057]S3. Production of protective layer: Add the material cooled in step S2 into the extruder, set the temperature of...

technical field

[0001] The invention belongs to the technical field of transportation pipelines, in particular to a scratch-resistant slow-cracking PE gas pipeline and a preparation method thereof. Background technique

[0002] The existing PE gas pipeline has a single-layer structure. At the installation and construction site, it is inevitable that the pipe will be scratched with the sand and gravel on the ground during the handling project, and the surface is prone to scratches. The wall thickness of the damaged part becomes thinner. It is easy to be damaged at the scratched part in the medium, which will lead to the occurrence of the burst tube.

[0003] Therefore, it is necessary to improve its scratch and slow cracking resistance. Contents of the invention

[0004] The purpose of the present invention is to provide an anti-scratch slow cracking PE gas pipeline, which can solve the problem that the above-mentioned gas pipeline is prone to scratches. Another purpose of...

Examples

Embodiment 1

[0038] A protective layer for gas pipelines, the composition and the specific weight of each composition are: 90 parts of heat-resistant polyethylene, 0.5 part of polysiloxane, 0.5 part of silane crosslinking agent, 0.1 part of graphene, 1 part of polyamide, disulfide 0.5 part of molybdenum, 1 part of glass fiber and carbon fiber composition, 0.5 part of maleic anhydride graft copolymer, and the thickness of the protective layer is 0.5 mm.

[0039] The mass ratio of the glass fiber and carbon fiber composition is: 1 part of glass fiber and 1 part of carbon fiber.

[0040] The preparation method of the above gas pipeline protective layer comprises the following steps:

[0041] S1. Mixing: Mix the above materials evenly at 50°C, and the mixing time is 3 minutes;

[0042] S2. Cooling: After the mixing is completed, cool to 28°C and set aside;

[0043] S3. Production of protective layer: add the material cooled in step S2 into the extruder, the temperature of the extruder is set...

Embodiment 2

[0045] A protective layer for a gas pipeline, the composition and the specific weight of each composition are: 100 parts of heat-resistant polyethylene, 5 parts of polysiloxane, 3 parts of silane crosslinking agent, 3 parts of graphene, 7 parts of polyamide, disulfide 5 parts of molybdenum, 6 parts of glass fiber and aromatic polyamide fiber composition, 5 parts of maleic anhydride graft copolymer, and the thickness of the protective layer is 3 mm.

[0046] The mass ratio of the composition of glass fiber and aromatic polyamide fiber is: 1 part of glass fiber and 1 part of aromatic polyamide fiber.

[0047] The preparation method of the above gas pipeline protective layer comprises the following steps:

[0048] S1. Mixing: Mix the above materials evenly at 65°C, and the mixing time is 6 minutes;

[0049] S2. Cooling: After the mixing is completed, cool to 29°C and set aside;

[0050] S3. Production of protective layer: Add the material cooled in step S2 into the extruder, se...

Embodiment 3

[0052] A protective layer for gas pipelines, the composition and the specific weight of each composition are: 110 parts of heat-resistant polyethylene, 10 parts of polysiloxane, 5 parts of silane crosslinking agent, 5 parts of graphene, 15 parts of polyamide, disulfide 10 parts of molybdenum, 10 parts of carbon fiber and aromatic polyamide fiber composition, 10 parts of maleic anhydride graft copolymer, and the thickness of the protective layer is 2 mm.

[0053] The mass ratio of the carbon fiber and aramid fiber composition is: 1 part of carbon fiber and 1 part of aramid fiber.

[0054] The preparation method of the above gas pipeline protective layer comprises the following steps:

[0055] S1. Mixing: Mix the above materials evenly at 80°C, and the mixing time is 10 minutes;

[0056] S2. Cooling: After the mixing is completed, cool to 30°C and set aside;

[0057]S3. Production of protective layer: Add the material cooled in step S2 into the extruder, set the temperature of...

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