Petroleum-free wood fiber panels

[Chimel31]

Hello,

I am interested in semi-rigid wood fiber panels to insulate the attic under crawls, but by doing some research I can not find any (list below) that does not have 6-10% polyester or non-biodegradable polyethylene (polyolefin) as a binder, both from the petroleum industry.
Do you know of panels that are more natural and especially recyclable at the end of their life?

I believe there are panels that use the resin or natural lignin of wood as a binder, but it seems that it only applies to rigid panels for insulation from the outside of the roof or walls, name of one. wood fiber pipe!

Sincerely,
Chimal.

Gutex Thermoflex (λ 0,036)
Isonat Flex 40 (λ 0,038) and 55 (λ 0,036)
Pavatex Pavaflex-Comfort 36
Steico Flex F 038 and 036