sin natas ni posos

English translation: no sedimentation or creaming

17:08 Jan 3, 2017
Spanish to English translations [PRO]
Tech/Engineering - Materials (Plastics, Ceramics, etc.)
Spanish term or phrase: sin natas ni posos
Talking about a water repellent (hidrofugante), the sentence says "Emulsión estable, no decanta (sin natas ni posos)."
I am stuck on the natas and posos. Thank you
SarahClarkG
Local time: 01:54
English translation:no sedimentation or creaming
Explanation:
https://books.google.co.uk/books?id=KimqCBg0s8QC&pg=PA419&lp...

Gravitational droplet sedimentation or creaming occurs when the densities of the two phases of the emulsion are dissimilar, and the viscosity of the emulsion is low enough to allow the droplets to move. To prevent phase separation in cases where the phase densities cannot be changed, it is common to increase the viscosity of the emulsion, either by dissolving thickeners in the continuous phase, or formulating the emulsion with a high volume fraction of dispersed phase so that droplet packing itself gives rise to higher viscosity.

http://www.particlesciences.com/news/technical-briefs/2009/e...

--------------------------------------------------
Note added at 47 mins (2017-01-03 17:56:49 GMT)
--------------------------------------------------

Using the centrifugal stress as the instability source, this experimental procedure provides remarkable information about the system stability since it accelerates the rate of creaming or sedimentation of the products (22).

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2974161/

'natas' = creaming
'posos' = sedimentation

--------------------------------------------------
Note added at 51 mins (2017-01-03 18:00:18 GMT)
--------------------------------------------------

Sedimentation and creaming are two analogous phenomena, but in one case, "particles" in the liquid have a density higher than the liquid, and in the other case, the density is lower. In other words, in one case, particles fall, but in the other case, they float.

https://www.agroparistech.fr/IMG/pdf/sedimentation_creaming....

Creaming, in the laboratory sense, is the migration of the dispersed phase of an emulsion, under the influence of buoyancy. The particles float upwards or sink, depending on how large they are and how much less dense or more dense they may be than the continuous phase, and also how viscous or how thixotropic the continuous phase might be. For as long as the particles remain separated, the process is called creaming.

https://en.wikipedia.org/wiki/Creaming_(chemistry)

Creaming or sedimentation occurs as a result of the density difference between the phases. This process results from external forces usually gravitational or centrifugal. When such forces exceed the thermal motion of the droplets (Brownain motion), a concentration gradient builds up in the system with the larger droplets moving faster to the top (if their density is lower than that of the medium) or to the bottom (if their density is larger than that of the medium) of the container. In the limiting cases, the droplets may form a close-packed (random or ordered) array at the top or bottom of the system with the remainder of the volume occupied by the continuous liquid phase

http://doclecture.net/1-65857.html
Selected response from:

Helena Chavarria
Spain
Local time: 01:54
Grading comment
Selected automatically based on peer agreement.
4 KudoZ points were awarded for this answer



Summary of answers provided
3 +2no sedimentation or creaming
Helena Chavarria


Discussion entries: 4





  

Answers


45 mins   confidence: Answerer confidence 3/5Answerer confidence 3/5 peer agreement (net): +2
no sedimentation or creaming


Explanation:
https://books.google.co.uk/books?id=KimqCBg0s8QC&pg=PA419&lp...

Gravitational droplet sedimentation or creaming occurs when the densities of the two phases of the emulsion are dissimilar, and the viscosity of the emulsion is low enough to allow the droplets to move. To prevent phase separation in cases where the phase densities cannot be changed, it is common to increase the viscosity of the emulsion, either by dissolving thickeners in the continuous phase, or formulating the emulsion with a high volume fraction of dispersed phase so that droplet packing itself gives rise to higher viscosity.

http://www.particlesciences.com/news/technical-briefs/2009/e...

--------------------------------------------------
Note added at 47 mins (2017-01-03 17:56:49 GMT)
--------------------------------------------------

Using the centrifugal stress as the instability source, this experimental procedure provides remarkable information about the system stability since it accelerates the rate of creaming or sedimentation of the products (22).

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2974161/

'natas' = creaming
'posos' = sedimentation

--------------------------------------------------
Note added at 51 mins (2017-01-03 18:00:18 GMT)
--------------------------------------------------

Sedimentation and creaming are two analogous phenomena, but in one case, "particles" in the liquid have a density higher than the liquid, and in the other case, the density is lower. In other words, in one case, particles fall, but in the other case, they float.

https://www.agroparistech.fr/IMG/pdf/sedimentation_creaming....

Creaming, in the laboratory sense, is the migration of the dispersed phase of an emulsion, under the influence of buoyancy. The particles float upwards or sink, depending on how large they are and how much less dense or more dense they may be than the continuous phase, and also how viscous or how thixotropic the continuous phase might be. For as long as the particles remain separated, the process is called creaming.

https://en.wikipedia.org/wiki/Creaming_(chemistry)

Creaming or sedimentation occurs as a result of the density difference between the phases. This process results from external forces usually gravitational or centrifugal. When such forces exceed the thermal motion of the droplets (Brownain motion), a concentration gradient builds up in the system with the larger droplets moving faster to the top (if their density is lower than that of the medium) or to the bottom (if their density is larger than that of the medium) of the container. In the limiting cases, the droplets may form a close-packed (random or ordered) array at the top or bottom of the system with the remainder of the volume occupied by the continuous liquid phase

http://doclecture.net/1-65857.html

Helena Chavarria
Spain
Local time: 01:54
Works in field
Native speaker of: Native in EnglishEnglish
PRO pts in category: 28
Grading comment
Selected automatically based on peer agreement.

Peer comments on this answer (and responses from the answerer)
agree  Marie Wilson
2 hrs
  -> Thank you, Marie :-)

agree  Jennifer Levey: Just to clarify: the terms in the answer are correct, but in reverse order compared to the question 'as posed'.
5 hrs
  -> Yes, I realised I'd got the order mixed up, which is why I added a note half way through my answer. Thank you, Robin :-)
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