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Processing

Date:2015/1/27 18:11:32 Hits:723
The components of the system should be mixed in the following proportions:
95%TA11XX HD/FP10XXLD series compound
5%TA21XX HD/FP20XXLD series catalyst masterbatch
Please note that the level of the catalyst masterbatch should not be reduced below the recommended content of the formulation. This will ensure that the pipe is correctly stabilized for long-term service life and satisfactory

performance.

It is very important to understand, that the mixture of grafted PE and catalyst masterbatch is potentially reactive. Therefore the mixing of these materials should only be done directly before processing them. Already mixed materials have to be fabricated during 2 hours.
Inside the barrel, the cross-linking process will start slowly. Here all the necessary elements to speed up the reaction are present. ( E. g. the cross-linking catalyst, elevated temperature and moisture is present drawn in from the environmental air )
Please refer to the recommendations given in 3.3 “Stopping the line'' to prevent problems during normal production.

Extrusion::
CONSTAB®
silane cross-linking technology does not require existing extrusion equipment to be modified. The components of the TA/FP system are processed in an identical manner to standard thermoplastic polyethylene compounds of similar density and melt-flow characteristics.
To ensure excellent processing of the CONSTAB TA/FP system the use of a processing aid masterbatch is recommended. An addition of 0.5-2.0% of these masterbatches guaranties best extrusion results.

Extruder conditions
The TA/FP series compounds can be processed on most modern thermoplastics extruders without any problems. Especially if the screw is designed for polyethylene, excellent products can be expected.

Pre-drying of materials
If the extrusion takes place under normal environment conditions, there is no need of pre-drying either the graft or the catalyst. During the manufacturing at CONSTAB, a very low content of water in these products is insured.
In areas with exceptionally high humidity, pre-drying of the catalyst masterbatches can improve the extrusion results.
If the unspecified color masterbatch is used, pre-drying is recommended. This will prevent any additional water that could cause premature cross-linking from entering the process.

Stopping the line
For line stops of less than 5 minutes, no precaution has to be taken. However it is recommended to keep the extruder running at low screw speed during maintenance of other parts of the extrusion line. If the extruder is stopped for a longer period of time, the cross-linking reaction will slowly start. Therefore, in case of extended or stops the extruder should be immediately flushed by processing a normal HDPE , MFR (190℃/ 2.16kg ) 0.3g/10min or lower. If all melt of the system has been removed from the barrel and the tools by purging the line, restarting will be possible as usual. If the line contains elements without streamline shape e.g. complicated mixing units on the screw or dead ends in the die head, it can be necessary to remove the screw and die from the line and exhaustive clean the interior surfaces.
 
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
The following methods are mainly used for cross-linking Polyethylene
The rules of gel content for different cross-linking techniques
The processes of silane cross-linking polyethylene
Can PEX-material be dried
The influence factors of gel content of silane cross-linking polyethylene
Mixing of grafted material and masterbatches
How to reduce the premature cross-linking of PEX
How to improve the surface quality of the pipes
How to reduce the internal stress of pipes
What about standards of PEX pipe
What kind of joint techniques are available for PEX pipes
PEX pipes are used in the following applications:
The corrosion resistance of PEX
The shrinkage of PEX pipe
Advices on trial of PEX
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