Let’s rehabilitate industrial hemp!

Agriculture and soil. Pollution control, soil remediation, humus and new agricultural techniques.
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Re: Let's revitalize industrial hemp!




by Christophe » 03/03/20, 16:36

Yes thank you I understood!
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Re: Let's revitalize industrial hemp!




by GuyGadebois » 03/03/20, 17:47

Christophe wrote:Yes thank you I understood!

You know all the strings!
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Re: Let's revitalize industrial hemp!




by sicetaitsimple » 03/03/20, 18:02

I have nothing against industrial hemp ...
But could you please modify the title by adding an "H" to Réabilitons .....

First, it will go a little with the subject of hemp.
Incidentally, it will please some that "H" is not forgotten.

Thank you in advance.
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Re: Let's revitalize industrial hemp!




by GuyGadebois » 03/03/20, 18:17

I can not.
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Re: Let's revitalize industrial hemp!




by sicetaitsimple » 03/03/20, 18:25

Ah, sorry ... I thought the initiator of a thread could change the title.
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Re: Let's revitalize industrial hemp!




by Ahmed » 03/03/20, 20:33

No, the "H" is reserved for the moderator! : Wink:
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Re: Let's revitalize industrial hemp!




by sicetaitsimple » 03/03/20, 21:07

A real patacaisse. But I am "as-been" ...
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Re: Let's rehabilitate industrial hemp!




by izentrop » 04/03/20, 00:26

The hemp has not disappeared, it is just in competition with aramid, cotton, Dyneema®, linen, HMPE, jute, Kevlar®, synthetic hemp, LCP, shackle, nylon, PBO, polyamide, polyester, polyethylene monofilament, poly hemp , polypropylene, PP ribbon / split, PP spun fiber, PTFE, PVA, PVDF, sisal, Spectra®, Technora®, Twaron®, UHMWPE, Vectran® and Zylon®. https://www.kanirope.fr/shop/corde-cordage-accessoires
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Re: Let's rehabilitate industrial hemp!




by GuyGadebois » 04/03/20, 01:20

This is not the subject.
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Re: Let's rehabilitate industrial hemp!




by Bardal » 04/03/20, 09:55

Perhaps it would be good to correct some somewhat exaggerated claims concerning the properties of hemp.
I experienced the end of the use of hemp (and flax) in nautical activities, just before the introduction of synthetic fibers (essentially tergal -polyester- and nylon - polyamide-); the truth is very far from the assertions of the current zealots of these fibers, even if certain advantages can be recognized with natural fibers.

- mechanical properties: hemp fiber, with equal cross-section, is 3 times less resistant than fiberglass (linen is better, 2 times less resistant); even taking into account the different density, hemp is 2 times less resistant than fiberglass. source CELC.

- durability: one of the constant concerns of sailors at that time was not to find their ropes and sails rotten after wintering, the slightest trace of humidity inducing an immediate attack by microorganisms and macroorganisms, in a short time (2 or 3 months ); the fishermen, to fight against this scourge, "tanned" their sails and nets with products that were not necessarily ecological (copper sufates, tars, tannins, etc.); cotton sails (more expensive and reserved for yachting) rotted less, but molded, which is not much better. In general, all natural products are biodegradable and attacked by microorganisms (otherwise, since the time that hemp has existed, we would be walking on a very thick layer of hemp), that's why they are compostable and can be used as green manure. It is above all thanks to a much superior durability that synthetic fibers very quickly established themselves in this field.

- the "comfort" of natural fibers for clothing remains very relative; this is true for cotton, it is much less true for hemp (which left some stinging memories for young sailors), and for flax which must receive specific treatment to be bearable.

There is no point in giving these natural fibers exceptional "little known" qualities, it is doing them a very disservice in the medium term. There are hardly any miracles on earth and the properties of the various fibers have been known, sometimes for a very long time; remember that the most resistant fiber that we know is of natural origin, it is spider silk (it is a protein); maybe we could start knitting ...
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