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

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 ...

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 replacement of pipelines is required, which consumes a lot of manpower and material resources, and reduces production efficiency.

If you want to increase the strength of the silicone tube, you can use a reinforced layer like an ordinary rubber tube. However, because the raw rubber is too soft and has low strength before the silicone is cooked, it is difficult to weave and wind the reinforced layer, which is difficult to process and high in cost.

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