Resultados preliminares sôbre o estudo do quenafe como matéria-prima para papel

Preliminary results on the study of kenaf as a raw-material for the pulp and paper industry

Resumos

The production of pulping raw material for the paper industry of four varieties of kenaf (Hibiscus cannabinus L.) sown at three spacings (30, 40 and 50 cm) was compared in a field trial made at the Experimental Center, Campinas, SP. The analysis of variance of obtained data showed no differences between production of varieties or/and spacings. As an average, the yield was 29.4 metric ton of green stems which corresponded to 6.7 ton of dried weight per hectare. Determinations of physical properties indicated that basic density of stems is only 0.13 g/cm³ and that bast fibers are identical to those of softwood. Wood fibers, however, are shorter and with a larger lumen. Coockings by the sodium sulfate and neutral sodium sulfite processes gave pulp of reasonable quality in bursting, folding and tensile strengths but weak in the tearing and with low porosity.

Resultados preliminares sôbre o estudo do quenafe como matéria-prima para papel^*

Preliminary results on the study of kenaf as a raw-material for the pulp and paper industry

Dirceu Ciaramello; Anísio Azzini

Engenheiros-agrônomos, Seção de Plantas Fibrosas, Instituto Agronômico

SINOPSE

Variedades de quenafe, plantadas em diferentes espaçamentos, foram estudadas em ensaio instalado em 1968 no Centro Experimental de Campinas, do Instituto Agronômico, visando à produção de matéria-prima para celulose e papel. Produções da ordem de 29,4 t/ha de massa verde renderam 6,7 t/ha de caules secos, que foram estudados, sob diversos processos de cozimento, na produção de pasta para papel.

Os processos sulfato e sulfito neutro de sódio revelaram-se apropriados para a obtenção de pasta celulósica de quenafe, dando papéis com boas características físico-mecânicas.

SUMMARY

The production of pulping raw material for the paper industry of four varieties of kenaf (Hibiscus cannabinus L.) sown at three spacings (30, 40 and 50 cm) was compared in a field trial made at the Experimental Center, Campinas, SP.

The analysis of variance of obtained data showed no differences between production of varieties or/and spacings. As an average, the yield was 29.4 metric ton of green stems which corresponded to 6.7 ton of dried weight per hectare.

Determinations of physical properties indicated that basic density of stems is only 0.13 g/cm³ and that bast fibers are identical to those of softwood. Wood fibers, however, are shorter and with a larger lumen.

Coockings by the sodium sulfate and neutral sodium sulfite processes gave pulp of reasonable quality in bursting, folding and tensile strengths but weak in the tearing and with low porosity.

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LITERATURA CITADA

Recebido para publicação em 9 de abril de 1970.

• 1. AGENCY FOR INTERNATIONAL DEVELOPMENT. Second International Kenaf Conference. Washington, 1964. 288p.
• 2. ASSOCIAÇĂO TÉCNICA BRASILEIRA DE CELULOSE E PAPEL. Métodos de ensaio. Săo Paulo, 1968. 36p.
• 3. BARRICHELLO, LUIZ ERNESTO GEORGE. Celulose sulfato de madeira de kiri e eucalipto. Săo Paulo, Associaçăo Técnica Braleira de Celulose e Papel, 1968. 16p. (Separata 4)
• 4. GUIMARĂES, JOĂO PAULO MARTINELLI & REDKO, BEATRIZ VERA POZZI. Da utilizaçăo de Pinus elliottii aclimatado como fonte de celulose para papel. Boletim da Associaçăo Técnica Brasileira de Celulose e Papel, Săo Paulo, 3(2):31-36, 1969.
• 5. TECHNICAL ASSOCIATION OF THE PULP AND PAPER INDUSTRY. Conference on "Kenaf as a Pulping Raw Material". Tappi 51(2):118A-123A, 1968.
• ⁶
  ________. Tappi standards and suggested methods. New York.
• 7. WHITE, GEORGE A. A search for new fiber plants. Tappi 52(4): 656-659, 1969.

*

Trabalho apresentado na II Convenção Nacional da Associação Técnica Brasileira de Celulose e Papel, São Paulo, Novembro de 1969.

Datas de Publicação

• Publicação nesta coleção
  18 Mar 2009
• Data do Fascículo
  1971

Histórico

• Recebido
  09 Abr 1970