Area Rugs Leaving Yellow Stains Underneath

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admin

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#1
Have you guys ever encountered area rugs turning the carpets underneath yellow/orange? what causes this?
 

rob allen

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#3
Yep, seems permanent to me also.
 
T

TheEyeball

#5
See it all the time. Those rubber backed mats will even stain linoleum and tile. They should be outlawed! I have never been able to remove it from carpet.
 

admin

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#11
See it all the time. Those rubber backed mats will even stain linoleum and tile. They should be outlawed! I have never been able to remove it from carpet.
exactly :D
 

Scott W

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#13
This is sometimes clled plasticizer migration. Ther are ingreients (plasticizers) in rubber and soft plastics to keep them flexible and slow down oxidizing. When in contact with another surface made of synthetic plastic, these plasticizers can move from one surface to the other and take the color with them.

Moisture trapped under the mat and heat can both speed up the reaction.

Sometimes can be imporoved with an oxidizer such as sodium perborate, but I have never seen them removed.

Scott Warrington
 
T

TheEyeball

#14
Has anyone ever seen one of those rubber or rubber-like mats disintegrate into a super fine powder? I've seen it happen when they get wet, but I cleaned a rug for a lady FULL of that stuff and she swears it never got wet, and that it broke apart on it's own.

I soaked the rug in a bath and steam cleaned and vacuumed it about 14 million times, and the stuff was still coming out like crazy. What gives?
 

Scott W

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#15
Has anyone ever seen one of those rubber or rubber-like mats disintegrate into a super fine powder? I've seen it happen when they get wet, but I cleaned a rug for a lady FULL of that stuff and she swears it never got wet, and that it broke apart on it's own.

I soaked the rug in a bath and steam cleaned and vacuumed it about 14 million times, and the stuff was still coming out like crazy. What gives?
If the rug is still intact but lots of powder coming out when cleaning, it could be from on-going use of powdered deodorizers - Carpet Fresh, Luv My carpet- and such.

Scott Warrington
 
#16
Plasticisers are often guilty of causing this problem but another cause is off-gassing of latex compound causing Phenolic Yellowing. Butylhydroxytoluene, also know as Butylated hydroxytoluene and BHT is used as an antioxidant and it is believed to be the cause, though recently this has been brought into question. The same compound is found in a diverse range of products, including particle board (chipboard) which is frequently used in inexpensive furniture. I frequently find that bedside cabinets, which often have un-coated chipboard in contact with the carpet, often leave a yellow 'footprint'.

The most effective treatment seems to be a strong solution of citric acid, allowed to dry in. Unfotinately the sticky nature if the acid crystals requires a further visit to rinse out to aviod rapid soiling of the treated area.
 
#17
Scott,

Another potential cause is on older tufted rugs is the breakdown of the latex compound.

Sometimes the manufacturer will use too much 'filler' in proportion to the more expensive latex and this results in premature failure on the mix as well as an increased tendency to 'ripple' when cleaned.
 

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