Trivex vs. Polycarbonate

[WindyParticipant @windy30762]

I was at my opticians today for a regular eye test and he showed me a material called Trivex that has uses for safety glasses.

 

He gave me a disc that had a spiral cut in it to weaken it and said try to break it.

 

It was tough yet flexable and according to one web site.

 

Younger Optics guarantees its Trivex products (Trilogy) for life, against stress fractures and drill mount cracking.

 

Depending on the cost and availability. it might be of use to some of our experimental model engineers

 

Windy.

 

[WindyParticipant @windy30762]

[David Southwell ARPSParticipant @davidsouthwellarps]

Posted by Windy on 12/08/2011 11:55:59:

I was at my opticians today for a regular eye test and he showed me a material called Trivex that has uses for safety glasses.

 

He gave me a disc that had a spiral cut in it to weaken it and said try to break it.

 

It was tough yet flexable and according to one web site.

 

Younger Optics guarantees its Trivex products (Trilogy) for life, against stress fractures and drill mount cracking.

 

Depending on the cost and availability. it might be of use to some of our experimental model engineers

 

Windy.

 

DAVID: If you do machine trivex material  most labs are careful to work it as cool as is practically possible and avoid stress when hot..It is resistant to most chemicals as far as I am aware (unlike polycarbonate).

Edited By David Southwell ARPS on 12/08/2011 12:55:30

Edited By David Southwell ARPS on 12/08/2011 13:02:41

[Michael GilliganParticipant @michaelgilligan61133]

Thanks, both, for this useful info.

David has aleady warned about Polycarbonate’s poor chemical resistance. I would just add the, perhaps surprising, note that this includes Loctite … which causes embrittlement.

MichaelG.

[David Southwell ARPSParticipant @davidsouthwellarps]

Good point Michael. Incidentally when polishing Trivex you can use whatever works for you on Polycarbonate but careful not too build up too much heat when polishing and give Trivex good support while doing so!

Edited By David Southwell ARPS on 12/08/2011 18:29:28

[Jeff DaymanParticipant @jeffdayman43397]

 

 

Bear in mind when experimenting with Trivex that it is a modified two part polyurethane resin. As such it is quite flammable. It should not be used in pressure vessels or at temps exceeding 100 deg C.

 

It is a viable alterate to polycarbonate for some applications and is lighter than PC and other transparent resins, but has many of the same operating limitations.

 

Primary industrial uses for it are eyeglass lenses and aircraft windscreens.

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