Sentences with phrase «bark tannins»

In Finland, softwood bark tannins would be well suited for adhesive production for the manufacturing of wood products at sawmills.

«New products from bark to replace fossil compounds: Adhesives and insulating foams from softwood bark tannins.»

«The application potential of wood bark tannins is great.

Not exact matches

They have developed methods to extract tannins from native tree bark and tested their suitability in the production of adhesives for fibreboards and chipboards.

Tree bark of native conifers is never used in commercial tannin extraction.

Studies conducted by the National Research Programme «Resource Wood» show that tannins extracted from native tree bark can be used to produce adhesives and composite materials.

These properties are not necessarily attributable to the tannins themselves but to other components that are extracted from the bark.

Bark - based tannins are already being used to bind not only wood products but also other fibrous materials.

At least 130 kg of crude tannin powder can be produced from one tonne of dry wood bark, still leaving 87 % of the original bark mass available for incineration.

As part of the international ERA - NET project, VTT Technical Research Centre of Finland Ltd developed, in collaboration with its partners, a tannin extraction process from bark material generated as a by - product in the paper and wood industry to give added value to the fraction currently used for incineration.

The extraction process is quite simple: tannin can be extracted from bark using hot water, after which the extract is dried into a powder.

One tonne of dry wood bark yields at least 130 kg of tannin powder, leaving 87 % of the original bark mass available for incineration.

Extract from spruce bark, however, also contains other compounds, carbohydrates in particular, which limits the use of crude tannin.

The witch hazel leaves and bark from which the extract is distilled contain up to 10 % tannins by weight.

The medicinal properties of aspen trees is additionally supported by the unique mixture of tannins, triterpenes, and other compounds found in their bark extract.

The powerful astringent properties lie in the bark, and although it is used for smoking fish and furniture making, it is also a high source of tannins and iron.

It's also rich in tannin to tighten enlarged pores and features 88 % willow bark extract to fight acne and kill bacteria.

[23][28] They are highly resistant to disease, due to a thick protective bark and high tannin content.

The bark contains tannin for tanning leathers.