CRB 30003 by Yusriah Lazim https://padlet.com/yuszli/FORUM1 FORUM 1 - PLEASE RESPOND TO THE TOPIC GIVEN. en-us 2017-05-12 03:23:48 UTC 2017-05-25 04:48:11 UTC hello@padlet.com yuszli https://padlet.com/yuszli/FORUM1/wish/171403018 Give opinion on why epoxy is not favoured in pultrusion process.]]> 2017-05-12 03:26:57 UTC https://padlet.com/yuszli/FORUM1/wish/171403018 Epoxy not a favoured resin because epoxy resins is expensive material compared to other resins https://padlet.com/yuszli/FORUM1/wish/171616071 -Syairah]]> 2017-05-13 13:40:44 UTC https://padlet.com/yuszli/FORUM1/wish/171616071 Epoxies require more time for post-curing process for cross linking occurred completely to ensure resulting its optimum properties for products. Thus, the epoxies are not really suitable for this method. https://padlet.com/yuszli/FORUM1/wish/171646884 2017-05-14 02:24:34 UTC https://padlet.com/yuszli/FORUM1/wish/171646884 Epoxy has higher tendency to bond strongly to die wall. https://padlet.com/yuszli/FORUM1/wish/171646912 2017-05-14 02:26:16 UTC https://padlet.com/yuszli/FORUM1/wish/171646912 https://padlet.com/yuszli/FORUM1/wish/171646966 Epoxy resins are cured by stepwise reaction hence their reaction rate is very slow, which affects the productivity of pultrusion process.]]> 2017-05-14 02:29:07 UTC https://padlet.com/yuszli/FORUM1/wish/171646966 Epoxy is not suitable in pultrusion process because it was poor toughness as a results of their rigid structures and also prone to trapping air bubbles or dust during this process. https://padlet.com/yuszli/FORUM1/wish/171648647
-Sakinah Saila-

]]> 2017-05-14 03:45:51 UTC https://padlet.com/yuszli/FORUM1/wish/171648647 Reaction rate for epoxy is slow and it has shorter port life. https://padlet.com/yuszli/FORUM1/wish/171668597 2017-05-14 12:02:20 UTC https://padlet.com/yuszli/FORUM1/wish/171668597 Epoxy is not favoured in pultrusion because the heated die cost is high https://padlet.com/yuszli/FORUM1/wish/171670296 - Nur Farhana bt Shaharuddin Kalithasan]]> 2017-05-14 12:39:14 UTC https://padlet.com/yuszli/FORUM1/wish/171670296 https://padlet.com/yuszli/FORUM1/wish/171671213 Epoxy shows much better mechanical performance compared to other resin but it is not favoured in pultrusion process because the price is higher than other resin.
-nadzliyatul-]]> 2017-05-14 12:57:02 UTC https://padlet.com/yuszli/FORUM1/wish/171671213 Epoxy is not favored because of the complexity resin https://padlet.com/yuszli/FORUM1/wish/171672873 -thahirah-]]> 2017-05-14 13:22:12 UTC https://padlet.com/yuszli/FORUM1/wish/171672873 In my opinion, epoxy is not favoured in pultrusion because limited to constant or near constant cross-section component and also the price of epoxy to high rather than other resin https://padlet.com/yuszli/FORUM1/wish/171673999 2017-05-14 13:39:00 UTC https://padlet.com/yuszli/FORUM1/wish/171673999 because pultrusion is limited to materials that can be pulled through in strands which is include epoxy. https://padlet.com/yuszli/FORUM1/wish/171677228

]]> 2017-05-14 14:29:08 UTC https://padlet.com/yuszli/FORUM1/wish/171677228 as the material itself already expensive, using the pultrusion process will increase the cost of the process as the heated die cost can be highly expensive https://padlet.com/yuszli/FORUM1/wish/171677613 2017-05-14 14:35:37 UTC https://padlet.com/yuszli/FORUM1/wish/171677613 Epoxy require longer crosslinking times compared to other resin and require high temperature to initiate the crosslinking which is complicated process and highly cost. https://padlet.com/yuszli/FORUM1/wish/171682839 -Fatini bt. Hasim-]]> 2017-05-14 15:45:54 UTC https://padlet.com/yuszli/FORUM1/wish/171682839 https://padlet.com/yuszli/FORUM1/wish/171683365 complex processing parameter is required for curing of epoxy. Insufficient heat during cure will result in a network with incomplete polymerisation, and thus reduced mechanical, chemical and heat resistance. pultrusion is not recommended as it is difficult to provide the requirement needed to cure the epoxy. the epoxy also has the tendency to stick with the wall.

]]> 2017-05-14 15:52:35 UTC https://padlet.com/yuszli/FORUM1/wish/171683365 Epoxies require longer crosslinking times https://padlet.com/yuszli/FORUM1/wish/171704355 2017-05-14 20:33:24 UTC https://padlet.com/yuszli/FORUM1/wish/171704355 Cost https://padlet.com/yuszli/FORUM1/wish/171732259 2017-05-15 02:33:41 UTC https://padlet.com/yuszli/FORUM1/wish/171732259 Cost https://padlet.com/yuszli/FORUM1/wish/171732279 cost for epoxy is knownly higher than unsaturated polyester and thus it cannot been used for simple production]]> 2017-05-15 02:33:50 UTC https://padlet.com/yuszli/FORUM1/wish/171732279 https://padlet.com/yuszli/FORUM1/wish/171815963 Epoxy is not favoured in pultrusion process because this kind of process need long fibre and will produce continous product. Epoxy is a kind that cannot produce in continous way because its takes longer time to produce a product. The process that suitable for the epoxy is hand lay up and spray up. Pultrusion process is cure in the equipment while method for epoxy need to be cure at room temperature. Pultrution process is simple and good impregnation because its contain resin bath with the roller while epoxy used complex method. Epoxy is not favoured in pultrusion process because tge reason as i mentioned above. Thats all from me.
- Marisa bt Mazuki-]]> 2017-05-15 12:43:58 UTC https://padlet.com/yuszli/FORUM1/wish/171815963 https://padlet.com/yuszli/FORUM1/wish/171815986 Epoxy is not favoured in pultrusion process because this kind of process need long fibre and will produce continous product. Epoxy is a kind that cannot produce in continous way because its takes longer time to produce a product. The process that suitable for the epoxy is hand lay up and spray up. Pultrusion process is cure in the equipment while method for epoxy need to be cure at room temperature. Pultrution process is simple and good impregnation because its contain resin bath with the roller while epoxy used complex method. Epoxy is not favoured in pultrusion process because tge reason as i mentioned above. Thats all from me.
- Marisa bt -]]> 2017-05-15 12:44:02 UTC https://padlet.com/yuszli/FORUM1/wish/171815986 https://padlet.com/yuszli/FORUM1/wish/173759803 complex processing parameter is required for curing of epoxy. insufficient heat during cure will result in a network with incomplete polymerisation, and thus reduced mechanical, chemical and heat resistance. pultrusion is not recommended as it is difficult to provide the requirement needed to cure the epoxy. the epoxy also has the tendency to stick with the wall.
-Imran Hakim B Mohammed]]> 2017-05-25 04:44:32 UTC https://padlet.com/yuszli/FORUM1/wish/173759803