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Guest
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 Posted: Thu Apr 03, 2008 5:09 pm Post subject: PP and LDPE blend |
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Hi,
I would like to know if I blend PP and LDPE for extrusion. What is
maxium percentage of LDPE can be used? and I heard that i need to add
random copolymer PP in PP and LDPE blend to help the miscibilty. Is
it true? Whare can I find these information?
THank you very mucH
WIll |
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Frank
Guest
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| Posted: Thu Apr 03, 2008 10:25 pm Post subject: Re: PP and LDPE blend |
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wp_1117@hotmail.com wrote:
[quote]Hi,
I would like to know if I blend PP and LDPE for extrusion. What is
maxium percentage of LDPE can be used? and I heard that i need to add
random copolymer PP in PP and LDPE blend to help the miscibilty. Is
it true? Whare can I find these information?
THank you very mucH
WIll
[/quote]
I would do patent searches, e.g.:
http://www.patentstorm.us/patents/4873116-description.html
The polymers are not miscible but you can make blends. You probably need
a compatibilizer for best results. |
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L Alpert
Guest
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| Posted: Fri Apr 04, 2008 5:24 am Post subject: Re: PP and LDPE blend |
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wp_1117@hotmail.com wrote:
[quote]Hi,
I would like to know if I blend PP and LDPE for extrusion. What is
maxium percentage of LDPE can be used? and I heard that i need to add
random copolymer PP in PP and LDPE blend to help the miscibilty. Is
it true? Whare can I find these information?
THank you very mucH
WIll
[/quote]
If you are using a single screw, it may be better to compound and/or
pelletize your blend first. Hand blends can be quite variable. |
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Rolf Wissmann
Guest
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| Posted: Fri Apr 04, 2008 5:33 pm Post subject: Re: PP and LDPE blend |
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Suggest you read the following, including the references mentioned!
1. http://www.fibtex.lodz.pl/53_32_129.pdf
2. http://www.ces.clemson.edu/mmpl/publication/Polymer2005.pdf
With the suppliers help, you may want to consider testing compatibilizers
like Fusabond:
3. http://www.dupont.com/industrial-polymers/plastics/selector/index.html#pp
It appears that the viscosity ratio between PP and LDPE is important in that
the resin which is going to form the continuous phase ought to be
(significantly) lower viscous compared to the resin which is supposed to be
dispered ...
Last but not least, I suggest you do a WEB-search on "PP LDPE blend
compatibilizer"! You>ll be surprised ..
wp_1117@hotmail.com wrote:
[quote]Hi,
I would like to know if I blend PP and LDPE for extrusion. What is
maxium percentage of LDPE can be used? and I heard that i need to add
random copolymer PP in PP and LDPE blend to help the miscibilty. Is
it true? Whare can I find these information?
THank you very mucH
WIll[/quote] |
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ljeffler
Guest
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| Posted: Wed May 21, 2008 7:02 am Post subject: Re: PP and LDPE blend |
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Before using some more expensive compatibilizers, you might wnat to try a
simple ethylene elastomer as a compatibilizer first. They are commonly used
to impact modify PP and being ethylene based are high compatible with LDPE.
I>d start with ~5% of an 0.870 g/cc density product that was similar in melt
index to the LDPE. Common commercial products are:
Dow Chemical - Engage
ExxonMobil - Exact
Mitsui - Tafmer
Hope this helps
Larry Effler
<wp_1117@hotmail.com> wrote in message
news:1724b131-0277-4324-a85b-170fa6a7402a@z38g2000hsc.googlegroups.com...
[quote]Hi,
I would like to know if I blend PP and LDPE for extrusion. What is
maxium percentage of LDPE can be used? and I heard that i need to add
random copolymer PP in PP and LDPE blend to help the miscibilty. Is
it true? Whare can I find these information?
THank you very mucH
WIll[/quote] |
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clao784
Guest
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| Posted: Tue Jul 01, 2008 10:20 pm Post subject: Re: PP and LDPE blend |
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On 20 mayo, 21:02, "ljeffler" <ljeff...@comcast.net> wrote:
[quote]Before using some more expensive compatibilizers, you might wnat to try a
simple ethylene elastomer as a compatibilizer first. They are commonly used
to impact modify PP and being ethylene based are high compatible with LDPE..
I>d start with ~5% of an 0.870 g/cc density product that was similar in melt
index to the LDPE. Common commercial products are:
Dow Chemical - Engage
ExxonMobil - Exact
Mitsui - Tafmer
Hope this helps
Larry Effler
wp_1...@hotmail.com> wrote in message
news:1724b131-0277-4324-a85b-170fa6a7402a@z38g2000hsc.googlegroups.com...
Hi,
I would like to know if I blend PP and LDPE for extrusion. What is
maxium percentage of LDPE can be used? and I heard that i need to add
random copolymer PP in PP and LDPE blend to help the miscibilty. Is
it true? Whare can I find these information?
THank you very mucH
WIll- Ocultar texto de la cita -
- Mostrar texto de la cita -
[/quote]
Now DOW has a better compatibilizer than Engage, it>s called VERSIFY
and is a hybrid between ethylene and propylene, you can find it in
www.dow.com |
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