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Pressure resisting Silicon rubber hose and its mfg. method

A manufacturing method and silicone rubber technology, applied in the direction of hoses, pipes, pipes/pipe joints/pipe fittings, etc., can solve the problems of easy insertion of fiber threads into the inner rubber layer, lack of strength, inner rubber layer pollution, etc., to ensure the braiding quality , Increase the tension of the outlet line, and the effect of high production efficiency

Inactive Publication Date: 2006-06-14
上海尚翔汽车胶管有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. When using the core method to prepare, firstly, the soft core and the release agent on the surface of the soft core are easy to pollute the inner rubber layer, and due to the limitation of the length of the soft core, only products with a limited length can be produced
On the other hand, when fiber braiding is carried out directly on the unvulcanized inner rubber tube blank, even if the braiding tension is small, the fiber thread is easy to embed into the inner rubber layer. If a small braiding tension is used, it is easy to cause the braided layer Puffy, so that the enhancement effect is not good
[0008] 2. Since the unvulcanized silicone rubber hollow tube basically has no mechanical strength, it cannot penetrate the hard core, and it is even more difficult to move it into the braiding machine for fiber braiding operations. Therefore, the usual hard core method cannot be used; in addition, Since it has no strength, it cannot be produced by the coreless method.

Method used

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  • Pressure resisting Silicon rubber hose and its mfg. method
  • Pressure resisting Silicon rubber hose and its mfg. method

Examples

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Effect test

Embodiment 1

[0021] see figure 1 and figure 2 , taking the pressure-resistant silicone rubber tube for blood transport used in the production of biological preparations as an example, this type of rubber tube requires a working pressure of 5kg / mm 2 , burst strength ≥ 15kg / mm 2 Above, the temperature resistance is required to be above 150°C, and there is no pollution to the blood. The use of pure silicone rubber hose cannot meet the above working pressure requirements, and the use of cloth hose is short in length and connected by multiple pieces, which is cumbersome to operate and easy to leak; Use food-grade natural rubber braided hose, which is easy to age and has potential pollution.

[0022] For this reason, adopt the pressure-resistant silicon rubber hose of the present invention and manufacturing method thereof, inner rubber layer [1] is main material with silicon rubber, mixes with 2,4-dichlorobenzoyl peroxide as vulcanizing agent, The inner diameter is Φ12mm, and the wall thickn...

Embodiment 2

[0024] A kind of high-pressure steam rubber hose used in the food industry, which requires a pressure resistance of 6kg / mm 2 , burst strength ≥ 17kg / mm 2 Above, the temperature resistance is required to be above 140°C. The original ethylene-propylene rubber braided hose is required to be replaced by a silicone rubber hose because it will cause some unpleasant odor pollution to the finished product.

[0025] The inner rubber layer [1] has an inner diameter of 10mm and a wall thickness of 2mm. The inner rubber layer is mixed with bis-2,5[2,5-dimethyl-2,5-bis(tert-butylperoxy)hexane ] as a vulcanizing agent, the extruded inner tube blank [5] was coiled in a water-bath vulcanization tank, and heated directly by steam at 145°C for 8 minutes to complete the pre-vulcanization treatment, and the rest were the same as in Example 1. The obtained product, Bursting strength up to 20kg / cm 2 , The product quality is stable, for users to use, and solves the problem of special odor pollutio...

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Abstract

A pressure silicon rubber hose and its manufacture method adapted for use in food and pharmaceutical industries comprises an inner rubber layer, a fibre-braided reinforcement and an outer rubber layer. The main material of the inner and outer layers is silicon rubber. The inside diameter of the inner rubber layer after prevulcanizing process is phi 8~25 mm and the thickness is 2~4 mm. The prevulcanizing can carry out in a hot-air drying tunnel or in a water bath vulcanizing bank.

Description

technical field [0001] The invention relates to a pressure-resistant rubber hose and a manufacturing method thereof, in particular to a high-temperature-resistant and pressure-resistant rubber hose suitable for food, biology, and pharmaceutical industries, which is non-polluting and non-toxic to conveyed objects and methods of manufacture thereof. Background technique [0002] In the rubber hose industry, for rubber hoses that are required to withstand a certain pressure, a structure reinforced with a fabric skeleton is generally used, and the fabric reinforced structure widely used at present is a fiber braided structure, because this structure has good pressure bearing performance. , good bending performance, high material utilization rate, etc. At this time, the braiding process has an important influence on the pressure resistance of the prepared braided reinforced rubber hose. It is especially important to properly control the braiding tension according to the design r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L11/08B29C35/04
Inventor 张利斌
Owner 上海尚翔汽车胶管有限公司
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