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Drying method for teflon dispersed resin

A technology of polytetrafluoroethylene and dispersing resin, which is applied in the direction of drying solid materials, heating to dry solid materials, and non-heating to dry solid materials, etc., to achieve the effect of improving cleanliness, shortening drying cycle and reducing impact.

Active Publication Date: 2007-07-18
SHANDONG DONGYUE POLYMER MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But for the vacuum drying method of polytetrafluoroethylene dispersed resin, domestic literature has never seen the report of relevant aspects

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] A kind of drying method of polytetrafluoroethylene dispersed resin, the steps are as follows:

[0022] 1) Manually discharge the PTFE dispersion resin to be dried and send it into the drier, start the vacuum system, vacuumize, and simultaneously turn on the steam heating device in the drier, and dry the material for 6 hours;

[0023] 2) After step 1), turn off the vacuum system, turn on the negative pressure induced draft fan, and fill in the heated dry hot air into the dryer to maintain the negative pressure in the dryer, and continue to dry the material for 6 hours;

[0024] 3) After step 2) is finished, stop supplying hot air to the drier, and switch to cold air to cool down for 2 hours before discharging;

[0025] Step 2) The temperature of the dry hot air added into the drier is 150°C.

[0026] The negative pressure state in the dryer described in step 2) is -0.005Mpa.

[0027] The negative pressure induced draft fan described in step 2) is a high pressure fan. ...

Embodiment 2

[0030] A kind of drying method of polytetrafluoroethylene dispersed resin, the steps are as follows:

[0031] 1) Manually discharge the PTFE dispersion resin to be dried and send it into the drier, start the vacuum system, vacuumize, and simultaneously turn on the steam heating device in the drier, and dry the material for 7 hours;

[0032] 2) After step 1), turn off the vacuum system, turn on the negative pressure induced draft fan, and fill in the heated dry hot air into the dryer to maintain the negative pressure in the dryer, and continue to dry the material for 7 hours;

[0033] 3) After step 2) is finished, stop adding hot air to the drier, and switch to cold air to cool down for 1 hour before discharging;

[0034] Step 2) The temperature of the dry hot air added into the drier is 180°C.

[0035] The negative pressure state in the dryer described in step 2 is -0.05Mpa.

[0036] The negative pressure induced draft fan described in step 2 is a high pressure fan.

[0037...

Embodiment 3

[0039] A kind of drying method of polytetrafluoroethylene dispersed resin, the steps are as follows:

[0040] 1) Manually discharge the PTFE dispersion resin to be dried and send it into the drier, start the vacuum system, vacuumize, and simultaneously turn on the steam heating device in the drier, and dry the material for 8 hours;

[0041] 2) After step (1), turn off the vacuum system, turn on the negative pressure induced draft fan, and fill in the heated dry hot air into the dryer to maintain the negative pressure in the dryer, and continue to dry the material for 8 hours;

[0042] 3) After the step (2) is finished, stop adding hot air to the dryer, and switch to cold air to cool down for 1 hour before discharging;

[0043] Step 2) The temperature of the dry hot air added into the drier is 300°C.

[0044] The negative pressure state in the dryer described in step 2 is -0.01Mpa.

[0045] The negative pressure induced draft fan described in step 2 is a high pressure fan.

...

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PUM

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Abstract

The invention relates to polytetrafluoroethylene dispersion resin drying method. Its features are that it adopts new type vacuum drier, introduce negative pressure induced draught fan to switch with the vacuum drier to change the negative pressure state in the drying system, takes out dried hot blast at the same time. This method can effectively control the drying time in 12-18 hours for the resin. Thus the production efficiency can be greatly improved. It has the advantages of short drying cycle, non expendable byproduct, saving cost, environmental protection.

Description

1. Technical field [0001] The invention relates to a drying method of polytetrafluoroethylene dispersed resin, which belongs to the technical field of polytetrafluoroethylene resin drying. 2. Background technology [0002] Polytetrafluoroethylene, commonly known as the "King of Plastics", is widely used in the national economy for its excellent properties such as: heat resistance, weather resistance, chemical corrosion resistance, low friction and good electrical insulation resistance. [0003] According to different polymerization methods, PTFE resin can be divided into two types: suspension method PTFE resin and dispersion method PTFE resin. Among them, the dispersion PTFE resin must be dried under static conditions due to the special requirements for its product performance. At present, there are mainly two drying methods that can meet this condition, namely hot air circulation drying method and vacuum drying method. [0004] The working principle of the hot air circula...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F26B7/00F26B5/04F26B3/06
Inventor 于克波宋学章胡庆喜毕宜刚
Owner SHANDONG DONGYUE POLYMER MATERIAL
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