Car perfume Diffuser.

[anmol101]

Hello All,

I am seeking to make Car perfume diffuser as DIY. I am planning to use the diffuser bottle as attached, where the perfume/liquid will be soaked by wooden cap and thred of the bottle and diffuse in the car. I bought perfume oil and mixed with DPG 30-70 ratio..... the result was mild smell in the car and not medium or strong that I would prefer. I changed the %ge to 35%-65% but still its diffusing mild smell. What am I doing wrong?

Shall I mix DPG 60% + 30% PERFUME OIL + 10% PERFUMERS ALCOHOL ?
Shall I use IPM?

 

[David Ruskin]

DPG is not the best carrier for this type of product, carbitol (diethylene glycol mono ethyl ether) is better. However I don't think the solvent/carrier is the problem. The problem will, undoubtedly, be the composition of your bought perfume oil. Unless this perfume oil was created for this end product it is more than likely it will not work. And before you ask, there is nothing you can do to improve its performance.

 

[ourmess]

"Garbage in, garbage out".

Nothing you do will make a premade fragrance intended for candles (for example) work as a car diffuser.

 

[RomanB]

Use MMB Kuraray as a base. It evaporates much faster than other solvents for diffusers, is a good solvent (way better than, for example, volatile isoparaffins), has relatively high flash point.

If something evaporates too slow, use MMB, if too fast, use Augeo. Their mixture could be fine-tuned to give perfect evaporation rate for a particular mixture.

DEP and IPM evaporate orders of magnitude slower than Augeo. DPG is too viscous to efficiently pass capillaries.

 

[David Ruskin]

Use MMB Kuraray as a base. It evaporates much faster than other solvents for diffusers, is a good solvent (way better than, for example, volatile isoparaffins), has relatively high flash point.

If something evaporates too slow, use MMB, if too fast, use Augeo. Their mixture could be fine-tuned to give perfect evaporation rate for a particular mixture.

DEP and IPM evaporate orders of magnitude slower than Augeo. DPG is too viscous to efficiently pass capillaries.

If you read my first post above (number 2) you will see that the solvent/carrier is not the main problem here. I suggested a suitable solvent ( carbitol), but said that THAT IS NOT THE PROBLEM. The problem is the formulation of the fragrance oil.

 

[Culpa Ire]

I certainly agree with David here; fragrance oils are too generic and more importantly of unknown composition.

Also, the problem with reed diffusers isn’t so applicable with the type of diffuser used in vehicles as they tend to be cork or sponge. So, although the thicker solvents will still struggle and MMB or Augeo will be a better product for the task, the medium doesn’t have elongated capillaries to travel along before the mixture is diffused.

 

[David Ruskin]

The type of car air freshener in question has been described. A glass bottle with a wooden top through which the fragrance passes. Therefore a fragrance is required that will pass easily through the wooden top, without clogging it. Any old fragrance with unknowns will not do.

 

[Culpa Ire]

To make an educated comment I’d have to inspect the actual wooden top. But to my mind, if there is no other way to diffuse the formulation other than wood then most stuff is going to struggle. There are better designs for car diffusers out there so perhaps the OP should investigate that, too.

 

[David Ruskin]

To make an educated comment I’d have to inspect the actual wooden top. But to my mind, if there is no other way to diffuse the formulation other than wood then most stuff is going to struggle. There are better designs for car diffusers out there so perhaps the OP should investigate that, too.

Something I hadn't thought of, so thank you for pointing that out. Looking again I cannot see any way for the fragrance in the bottle to pass through the wooden top, even if it could. There is no wick, no contact between fragrance and lid. As you say, there must be better designs.

 

[Culpa Ire]

I’ve experimented with a type that has a square of cork sitting within a perforated metal or wooden cap; very effective with the thinner solvents mentioned in the thread. I’ve seen similar designs with a sponge-like material but also seen them reach saturation point quite quickly and start to leak.

When I have a bit more time perhaps I’ll post up a few links to the products in question.