Over-pressure over-temperature environment-friendly silica gel composite pipe and preparation method thereof

A technology for composite pipes and manufacturing methods, which is applied in the direction of hoses, pipes, mechanical equipment, etc., can solve the problems of high cost, reduced production efficiency, and low strength, and achieve the effects of improving strength, preventing bulging, and firm bonding

Inactive Publication Date: 2010-05-12
河北东劲液压橡塑制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the mechanical properties of silicone rubber such as tensile strength and tear resistance are poor, and its physical and mechanical properties are not as good as most synthetic rubbers at room temperature. Not good, the application places are limited
Due to structural reasons, the existing silicone tubes have poor pressure resistance in high temperature environments, generally only 10-20 kg/cm2. During use, frequent replaceme

Method used

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  • Over-pressure over-temperature environment-friendly silica gel composite pipe and preparation method thereof
  • Over-pressure over-temperature environment-friendly silica gel composite pipe and preparation method thereof
  • Over-pressure over-temperature environment-friendly silica gel composite pipe and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The first step is to prepare the inner rubber layer

[0054] 1a. Extrude the original inner rubber layer

[0055] Weigh silicone rubber SR: 100 kg, fumed silica: 40 kg, vulcanizing agent bis-25DBPMH: 0.4 kg, ferric oxide: 1 kg, environmentally friendly and odorless adhesive AS-88: 5 kg, inorganic flame retardant 5 kg of aluminum hydroxide is used for mixing, and then a soft core tire mandrel is selected, and the original inner rubber layer is extruded through a silicone rubber extruder, and the temperature of the fuselage head is controlled at 20°C;

[0056] 1b. Frozen molding

[0057]Control the temperature in the freezing chamber of the freezing equipment at -35°C, and then input the extruded original inner rubber layer into the pipe sleeve located in the cooling chamber for 18 minutes to obtain the formed inner rubber layer;

[0058] The second step is to wind the reinforcement layer

[0059] Weaving and winding methods are adopted on the outside of the freeze-for...

Embodiment 2

[0069] The first step is to prepare the inner rubber layer

[0070] 1a. Extrude the original inner rubber layer

[0071] Weigh silicone rubber SR: 100 kg, fumed silica: 55 kg, vulcanizing agent bis-25DBPMH: 1 kg, ferric oxide: 5 kg, coloring agent: 5 kg, environmentally friendly and odorless adhesive AS-88: 8 kg, 8 kg of inorganic flame retardant aluminum hydroxide for mixing, then select a soft core tire mandrel, extrude the original inner rubber layer through a silicone rubber extruder, and control the temperature of the machine head at 40 °C;

[0072] 1b. Frozen molding

[0073] The temperature in the freezing chamber of the freezing equipment is controlled at -45°C, and then the extruded original inner rubber layer is input into the pipe sleeve located in the cooling chamber for 12 minutes of freezing to obtain the formed inner rubber layer;

[0074] The second step is to wind the reinforcement layer

[0075] Weaving and winding methods are adopted on the outside of the...

Embodiment 3

[0085] The first step is to prepare the inner rubber layer

[0086] 1a. Extrude the original inner rubber layer

[0087] Weigh silicone rubber SR: 100 kg, fumed silica: 45 kg, vulcanizing agent bis-25DBPMH: 0.6 kg, ferric oxide: 3 kg, coloring agent: 3 kg, environmentally friendly and odorless adhesive AS-88: 6 kg, 6 kg of inorganic flame retardant zinc borate for mixing, then select a soft core tire mandrel, extrude the original inner rubber layer through a silicone rubber extruder, and control the temperature of the machine head at 30 °C;

[0088] 1b. Frozen molding

[0089] The temperature in the freezing chamber of the freezing equipment is controlled at -40°C, and then the extruded original inner rubber layer is input into the pipe sleeve located in the cooling chamber for 16 minutes of freezing to obtain the formed inner rubber layer;

[0090] The second step is to wind the reinforcement layer

[0091] Weaving and winding methods are adopted on the outside of the free...

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Abstract

The invention belongs to the technical field of silica gel pipes and preparation methods thereof, and discloses an over-pressure over-temperature environment-friendly silica gel composite pipe and a preparation method thereof. The over-pressure over-temperature environment-friendly silica gel composite pipe is mainly and technically characterized by comprising an inner rubber layer and an outer rubber layer which are made of silicon rubber, wherein a strengthening layer is arranged between the inner rubber layer and the outer rubber layer. The inner rubber layer 1 and the outer rubber layer 3 comprise the following materials in parts by weight: 100 parts of silicon rubber SR, 40-55 parts of fume colloidal silica, 0.4-1 part of vulcanizing agent double-25DBPMH, 1-5 parts of ferric oxide, 0-5 parts of colorant, 5-8 parts of environment-friendly tasteless adhesive AS-88 and 5-8 parts of inorganic flame retardant aluminium hydroxide or zinc borate. The silicon rubber composite pipe is prepared by adopting the following steps of: freezing an inner rubber tyre to harden, winding the strengthening layer and vulcanizing, thus, the pressure resistance and the high temperature resistance of the common silicon rubber pipe are improved, the service life of the common silicon rubber pipe is prolonged, and the abrasion resistance is improved.

Description

technical field [0001] The invention belongs to the technical field of silicone tubes and preparation methods thereof, and in particular relates to an overpressure and overtemperature environment-friendly silicone composite tube and a preparation method thereof. Background technique [0002] Silicone rubber has excellent heat resistance, cold resistance, dielectric properties, ozone resistance and atmospheric aging resistance. The outstanding performance of silicone rubber is that it can be used in a wide temperature range, which can be used at -60°C (or lower temperature) to +250°C. ℃ (or higher temperature) for long-term use. However, the mechanical properties of silicone rubber such as tensile strength and tear resistance are poor, and its physical and mechanical properties are not as good as most synthetic rubbers at room temperature. Poor, application places are limited. Due to the structure, the existing silicone tube has poor pressure resistance in high temperature ...

Claims

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Application Information

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IPC IPC(8): F16L11/08C08L83/04C08K13/02C08K3/36C08K3/22C08K3/38B29D23/00B29C47/00B29C47/92B29C35/16B29C47/02B29C35/02B29C48/92
CPCB29C48/92B29C2948/92704B29C2948/92895B29C2948/92904
Inventor 刘宙鑫马海瑞刘荣英野庆林刘哲佳
Owner 河北东劲液压橡塑制品有限公司
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