Hello,
First off, I’d like to thank all the people that have worked on all the info that is provided on this site. I live in Greece, and there is virtually no site to gather information nowhere near this extent. Some topics on some forums where ‘anyone’ could give an opinion. I was watching a youtube video from beducation and they mentioned this site.
I couldn’t get memory foam / latex densities in the articles (Latex , Memory Foam )
After some searching I came up with the following info, but not sure how accurate they are.
[table]
[tr]
[td]LATEX / MEMORY FOAM DENSITY[/td]
[/tr]
[tr]
[td]GRADE[/td]
[td]LBS/FT^3[/td]
[/tr]
[tr]
[td]Low[/td]
[td]x < 4[/td]
[/tr]
[tr]
[td]Mid[/td]
[td]4 < x < 5[/td]
[/tr]
[tr]
[td]High[/td]
[td]x > 5[/td]
[/tr]
[/table]
Questions
- Would Dunlop and Talalay have the same density ranges. For example, let’s say we have a 28 ILD Dunlop / Talalay. Would both pieces be of the same density?
- If mattress cover is 100% natural cotton are mattress ventilation holes necessary? (Supposedly cotton allows mattress to breathe)
- Perimeter support (within mattress structure): what type and how hard of foam? What other options, material wise, are there?
- Adjusting bonnell spring height , depending on the thickness of comfort layers; would mattress properties change if we asked for coils height to be adjusted (higher or lower)?
- As mentioned in one of the articles, an all-latex mattress can vary in thickness from 6” to 11” (depending on person’s weight). What about an all-HR foam mattress? Same mattress thickness?
On this side of the world, some companies use kPa (Kilopascal) instead of ILD/IFD to measure hardness of a foam mattress. In search of a way to convert from one to the other, I came accross this site: [url=http://www.europeanbedding.sg/density-hardness-resilience-weight-of-latex-mattresses-a-40.html#.UlJx6VBkOSo]Density, Hardness, Resilience & Weight Of Latex Mattresses
According to the site,
[quote]1 ILD = 0.14 Kpa or 1 Kpa = 7.14 ILD
In general we can say a
soft mattress : +/- 3.5 kPa
medium mattress : +/- 4 kPa
firm mattress : +/- 4.5 kPa[/quote]
Also,
[quote]Using the length, width, height (thickness) and density of the mattress, we can easily calculate the weight of the mattress. For example, for our EB Back Care Perfect King Size latex mattress, the latex core length is 2m, the width is 1.8m and the height is 0.18m. Let’s calculate the weight of;
firm mattress : – 2 x 1.8 x 0.18 x 75 = 48.6kg
medium mattress : – 2 x 1.8 x 0.18 x 70 = 45.36kg
soft mattress : – 2 x 1.8 x 0.18 x 65 = 42.12kg[/quote]
- Do you happen to have a source to verify the above findings?
- If what is mentioned in the 2nd quote stands, then if we knew the net weight of the mattress (approximately) we would be able to calculate density. Is it really that simple? Or is it another made up story to confuse consumers?
7a) Could the same be applied to a polyfoam mattress?
7b) Could the same be applied to a single layer?
Thank you for your time
k3rb3r05