Chemie a potravinářství

Oblast zaměření: Produkty z biomasy
Komise : CEN/TC 454 (Algae and algae products)
Původce: CEN
K připomínkám do: 14.12.2020
Zobraz více Zobraz méně
 

This document describes the sample preparation of dry and wet samples of micro- and macroalgae, algae-based products and intermediates. This document enables laboratories analysing algae samples to report accurate dry weight percentages and to obtain representative samples possible for further examination.

Oblast zaměření: Lepidla
Komise : CEN/TC 193 (Adhesives)
Původce: CEN
K připomínkám do: 11.01.2021
Zobraz více Zobraz méně
 

This document establishes a classification of wood adhesives for non-structural applications for exterior use without protection by an adequate surface coating.

This document specifies performance requirements and durability classes of such adhesives for use in an environment corresponding to the defined conditions.

The performance requirements of this document apply to the adhesive only, not to wooden products.

This document is primarily intended to assess the performance of adhesives. The requirements apply to the type testing of the adhesives. Production control activities are outside the scope of this document.

Oblast zaměření: Lepidla
Komise : CEN/TC 193 (Adhesives)
Původce: CEN
K připomínkám do: 11.01.2021
Zobraz více Zobraz méně
 

This document specifies a method for adhesives for wood and derived solid wood products for determining the shear strength and wood failure percentage of wood-to-wood adhesive bonds loaded in compression. These parameters allow to define different working properties of adhesives: (e.g. final bond strength, pressing time, closed assembly time).

Annex A gives information required prior to testing.