led diffuser material

[Daniele-san]

Good morning boys
I would need to know what type, material color etc (even possibly also type of finishing on the mold) is usually used to create a diffuser for a led
I should create an insert on a button illuminated by a led

Thank you.
Hi.

 

[TECNOMODEL]

I don't know for sure, usually polycarbonate is used for applications like that.

definitely polished mold with optical grade.

 

[Daniele-san]

I don't know for sure, usually polycarbonate is used for applications like that.

definitely polished mold with optical grade.

Hi.

thanks for the surgery,

What would be polishing with "optical grade"?

 

[TECNOMODEL]

a mirror polish in which the surfaces maintain the quality with which they were designed.
this not to create distortions in the light that is emitted through the particular, or to not have a distorted view of what is beyond the same.

if the insert is small you should not need it, just a mirror polishing as for any transparent/glossy piece.
Then it also depends on the surface, if it is a plane it is all simpler than a curved surface.

 

[Daniele-san]

a mirror polish in which the surfaces maintain the quality with which they were designed.
this not to create distortions in the light that is emitted through the particular, or to not have a distorted view of what is beyond the same.

if the insert is small you should not need it, just a mirror polishing as for any transparent/glossy piece.
Then it also depends on the surface, if it is a plane it is all simpler than a curved surface.

Hi.
Now I understand, but I need the opposite,
the particular must be diffuser, usually materials not completely transparent or even with surfaces from em or photo engraving spread the light and through it you do not see the source of light below (as in a transparent "glass" but you would see it completely illuminated in a homogeneous way

to understand the led lamps, externally they have a white surface, just to spread the light evenly

I wanted to know if between polycarbonates (understood as raw material) there is a semi-transparent color I would say milk color

See photo attached

Thank you.

 

[Dade73]

Hello.
I would use pom acetalic resin, economical, very resistant and longeva. I attach an image of the many applications in the car dashboards, the backlit buttons of the cabin, are made with the overmolding of neutral acetalic ( semi-transparent effect), with the contour of black acetalic

 

[TECNOMODEL]

I misunderstood the use.

I agree with the suggestion of dade73, also for what you need you could use many materials.
practically all the transparent in which to insert a coloring in percentage x such as to have the desired effect.

polycarbonate is one of these, more expensive though than acetalic pom or others.

 

[Daniele-san]

Hello.
I would use pom acetalic resin, economical, very resistant and longeva. I attach an image of the many applications in the car dashboards, the backlit buttons of the cabin, are made with the overmolding of neutral acetalic ( semi-transparent effect), with the contour of black acetalicView attachment 43907

Thank you.
This seems interesting to me, it would serve without overprinting because the gem must be removable

I misunderstood the use.
I agree with the suggestion of dade73, also for what you need you could use many materials.
practically all the transparent in which to insert a coloring in percentage x such as to have the desired effect.
in your opinion are the surfaces still to be polished or can they be electro-erosion?
polycarbonate is one of these, more expensive though than acetalic pom or others.

thanks, in fact after your answer I think I will pass to the pom
the only problem now would indicate with some precision the coloring to add in percentage terms to have a color that approaches as much as possible to what I posted above

Can you help me?

 

[TECNOMODEL]

the neutral pom is already semitransparent, you should ask the supplier some sample to see what degree of transparency it has.

a priori it is difficult to establish a percentage, you have to do some tests and see the effect.
then your client will have to give you final approval.

 

[Daniele-san]

the neutral pom is already semitransparent, you should ask the supplier some sample to see what degree of transparency it has.

a priori it is difficult to establish a percentage, you have to do some tests and see the effect.
then your client will have to give you final approval.

If we already start from a semi-transparency, I would be at good point, important that the color does not tend to the ivory (to understand us) I hope it is appropriately like the detail that I posted above
the final customer at the end of the accounts would be me who is planning the device on which it is to be assembled and the molder will be our supplier

Thank you.

 

[Dade73]

Hello.
I confirm that the pom has no color deviations, has an extremely "clear" neutral base, for filtering light, it could be enough to play some tenth with the thickness piece to have the desired result.
Good day
davide

 

[Daniele-san]

Hello.
I confirm that the pom has no color deviations, has an extremely "clear" neutral base, for filtering light, it could be enough to play some tenth with the thickness piece to have the desired result.
Good day
davide

Good morning dade73,
has a 2mm thick "glass", I will make me do tests with neutral pom and any small additions of white coloring (hiking always the same percentage every batch of production.
I also believe that I will make the surfaces leave with a very fake electroerosion (I believe it helps to spread the light homogeneously)

 

[Daniele-san]

Hello.
I confirm that the pom has no color deviations, has an extremely "clear" neutral base, for filtering light, it could be enough to play some tenth with the thickness piece to have the desired result.
Good day
davide

hi dade73,

Would you give me an indication of poms in granules of some manufacturer (suitable for this type of application)?

Thank you.

Hi.

 

[Dade73]

Hello.
the materials on the market are many, if you want a good value for money I recommend you: kepital, kocetal, amcel, tarnoform....if I have interpreted your expectations of translucidity well, you will see that with the material such as without additives, or master, you have the desired result. (if you need to do a cost analysis, consider that to date the materials listed are located at about 1.35€/kg density pom1.41)

 

[Daniele-san]

Hello.
the materials on the market are many, if you want a good value for money I recommend you: kepital, kocetal, amcel, tarnoform....if I have interpreted your expectations of translucidity well, you will see that with the material such as without additives, or master, you have the desired result. (if you need to do a cost analysis, consider that to date the materials listed are located at about 1.35€/kg density pom1.41)

thanks dade73

 

[Dade73]

:finger: thanks to you

 

[MarcoAtk]

Bye.
Sorry I'm late. I use plexiglass opaline thickness 2mm or polycarbonate opaline.
the spread is very good with both... then depends on what distance the led positions.
other option could be illuminating the slab from the sides.

Bye.

Mar