Resumo
Tests were made on samples of ramie fibers (Boehmeria nivea Hook., var. locally known as Murakami), obtained from three month old plants grown at Campinas, State of São Paulo. The harvested material was processed and the fibers were degummed and bleached by the methods described. The physical and chemical tests made on six samples of the fibers gave the following average results : PHYSICAL TESTS Length maximum.................................. 360 mm average .................................. 200 mm minimum .................................. 90 mm Width maximum ................................. 63 mm average................................... 32 mm minimum .................................. 16 mm Tensile Strength maximum ................................. 70 g average .................................. 32 g minimum .................................. 11 g Fineness .................................. 5.80 Higroscopicity ........................... 7.36% Reabsorption.............................. 7.94% Relation Y................................. 6198 Relation Z ................................. 5.68 CHEMICAL TESTS Hydyolvsis alpha...................................... 1.30% beta....................................... 2.56% Acid purifibation ....................... 2.30% Ash........................................ 1.20% Celulose.................................. 96.63%
Algumas determinações físicas e químicas da fibra de rami
G. Paiva Castro; F. A. Correia
Engenheiros agrônomos, Secção de Plantas Fibrosas Diversas, Instituto Agronômico de Campinas
SUMMARY
Tests were made on samples of ramie fibers (Boehmeria nivea Hook., var. locally known as Murakami), obtained from three month old plants grown at Campinas, State of São Paulo. The harvested material was processed and the fibers were degummed and bleached by the methods described. The physical and chemical tests made on six samples of the fibers gave the following average results :
PHYSICAL TESTS
Length
maximum.................................. 360 mm
average .................................. 200 mm
minimum .................................. 90 mm
Width
maximum ................................. 63 mm
average................................... 32 mm
minimum .................................. 16 mm
Tensile Strength
maximum ................................. 70 g
average .................................. 32 g
minimum .................................. 11 g
Fineness .................................. 5.80
Higroscopicity ........................... 7.36%
Reabsorption.............................. 7.94%
Relation Y................................. 6198
Relation Z ................................. 5.68
CHEMICAL TESTS
Hydyolvsis
alpha...................................... 1.30%
beta....................................... 2.56%
Acid purifibation ....................... 2.30%
Ash........................................ 1.20%
Celulose.................................. 96.63%
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LITERATURA CITADA
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- 9. Roehrich, O. e Búi-Xuan-Nhuân. La fibre de ramie, ses propiétés, ses qualités textiles. L'Agronomie tropicale 1: 261-289, fig. 1-3, 1946.
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Datas de Publicação
-
Publicação nesta coleção
08 Jun 2010 -
Data do Fascículo
Dez 1948
