Preparation technique for large-diameter silicone tube

A preparation process and technology of silicone tubes, which are applied in the field of silicone tubes, can solve the problems of small diameter of silicone tubes, failure to meet production requirements, easy deformation of silicone tubes, etc., and achieve the effects of long service life, not easy to deform, and not easy to crack

Active Publication Date: 2014-05-07
DONGGUAN SUNTRACK WIRE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The existing silicone tube preparation process is suitable for preparing silicone tubes with a diameter of 1mm~10mm. The diameter of the silicone tube is small and cannot meet the requirements of large-flow liquid transportation.
If the existing silicone tube preparation process is used to prepare silicone tubes with a diameter of more than 10mm, the prepared silicone tube has a thinner tube wall, and the silicone tube is easy to crack, especially when the silicone tube transports high-temperature liquid for a long time, it is easy to cause leakage; and the silicone tube The tube is easily deformed, such as the production of a round silicone tube deformed into an oval silicone tube, which does not meet the production requirements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A preparation process for a large-diameter silicone tube comprises the following preparation steps to prepare a large-diameter silicone tube with a diameter of more than 10 mm and a tube wall of 3 mm to 5 mm.

[0025] (a) Feed mixing: Put 95%~98.2% silicone rubber, 1%~4.8% vulcanizing agent, and 0.2%~0.8% color masterbatch into the feeding equipment for mixing to obtain a mixture .

[0026] In terms of weight percentage, the vulcanizing agent is composed of 3%~7% of catalyst, 73%~78% of raw rubber, 18%~22% of hydroxyl silicone oil and 0.3%~0.5% of reaction inhibitor. The kneading temperature is 20° C. to 30° C., and the kneading time is 7 minutes to 8 minutes.

[0027] (b) Extrusion inflation: Extrude the mixed mixture through the extrusion die of the extrusion molding machine to extrude the primary product of large-diameter silicone tube with a diameter of more than 10mm and a tube wall of 3mm~5mm. The cavity of the finished product is continuously filled with gas; t...

Embodiment 2

[0033] A preparation process for a large-diameter silicone tube comprises the following preparation steps to prepare a large-diameter silicone tube with a diameter of more than 10 mm and a tube wall of 3 mm to 5 mm.

[0034] (a) Feeding and mixing: put 95% by weight of silicone rubber, 4.2% of vulcanizing agent, and 0.8% of color masterbatch into the feeding equipment, and carry out mixing to obtain a mixture. The kneading temperature was 30° C., and the kneading time was 7 minutes.

[0035] By weight percentage, the vulcanizing agent consists of platinum catalyst 3%, iron catalyst Fe 2 o 3 3.6%, raw rubber 74%, hydroxyl silicone oil 19% and reaction inhibitor 0.4%. The raw rubber is linear polysiloxane, and the reaction inhibitor is alcohol compound.

[0036] (b) Extrusion inflation: Extrude the mixed mixture through the extrusion die of the extrusion molding machine into a large-diameter silicone tube with a diameter of 11 mm and a tube wall of 3 mm. The body is continu...

Embodiment 3

[0042] A preparation process for a large-diameter silicone tube comprises the following preparation steps to prepare a large-diameter silicone tube with a diameter of more than 10 mm and a tube wall of 3 mm to 5 mm.

[0043] (a) Feeding and mixing: put 97.6% by weight of silicone rubber, 2% of vulcanizing agent, and 0.4% of color masterbatch into the feeding equipment, and carry out mixing to obtain a mixture. The kneading temperature was 30° C., and the kneading time was 7 minutes.

[0044] By weight percentage, the vulcanizing agent is 4% by platinum catalyst, and the iron series catalyst is Fe 3 o 4 1%, raw rubber 74.5%, hydroxyl silicone oil 20% and reaction inhibitor 0.5%. The raw rubber is linear polysiloxane, and the reaction inhibitor is the reaction product of alcohol compound and silane.

[0045] (b) Extrusion inflation: Extrude the mixed mixture through the extrusion die of the extrusion molding machine into a large-diameter silicone tube primary product with a ...

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Abstract

The invention relates to the technical field of silicone tubes, in particular to a preparation technique for a large-diameter silicone tube. The preparation technique includes the preparation steps: (a) throwing 95%-98.2% of rubber silicon, 1%-4.8% of vulcanizing agents and 0.2%-0.8% of color masterbatch in weight percent into feeding equipment and mixing the rubber silicon, the vulcanizing agents and the color masterbatch to obtain mixture; (b) extruding the mixed mixture to form a pre-finished large-diameter silicone tube by the aid of an extrusion machine and continuously filling gas into a cavity of the pre-finished large-diameter silicone tube; and (c) vulcanizing the pre-finished threading silicone sleeve by the aid of a vulcanizer to obtain the finished large-diameter silicone tube. The large-diameter silicone tube which is prepared by the aid of the formula and the technique and has a diameter larger than 10mm and a wall thickness ranging from 3mm to 5mm is thick in wall thickness, fine in ductility and long in service life, is resistant to high temperature and not easy to crack or deform, and meets production requirements.

Description

technical field [0001] The invention relates to the technical field of silicone tubes, in particular to a preparation process for large-diameter silicone tubes. Background technique [0002] Silicone tube is a silicone product that has passed RoHs, PAHs, SGS testing, and eight heavy metal testing. Silicone tube has the advantages of environmental protection, pollution-free, cold and high temperature resistance, non-toxic, and tasteless; silicone tube can be widely used in aviation, electronics, petroleum, Chemical, mechanical, electrical, medical, oven, food and other fields. The main classification of silicone tubes are high-pressure resistant silicone tubes, gear-shaped silicone tubes, food-grade (non-toxic) silicone tubes, medical silicone tubes, pharmaceutical silicone tubes, etc.; suitable for home appliances (coffee pots, kettles, electric irons, electric Rice cooker, fryer, disinfection cabinet water dispenser, fruit pulp machine, bread machine, gas appliance, water ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/00B29C47/92B29C35/02C08L83/04C08J3/24B29L23/00B29C48/92
Inventor 李厚昌
Owner DONGGUAN SUNTRACK WIRE
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