Osisi Pulpwood

Ịchọta osisi eucalyptus pulpwood na Australia.

Pulpwood bụ osisi nke a na-eji eme pulp osisi maka mmepụta akwụkwọ.

Ngwa

• Osisi ndị a zụlitere kpọmkwem maka mmepụta anụ ahụ na-akpata 15% nke mmepụta anụ ọhịa ụwa, oké ọhịa ochie na-eto eto 9% na oké ọhịa nke abụọ na nke atọ na ndị ọzọ na-akwalite nguzozi.^[1] A na-eme mgbatị ọhịa n'ọtụtụ ebe, yabụ osisi bụ ihe na-agbanwe agbanwe.
• A na-ejikwa osisi pulpwood dị ka a na-emepụta maka ụfọdụ ngwaahịa osisi, dị ka bọọdụ ntanye (OSB).
• Enwere ọchịchọ na-arịwanye elu maka pulpwood dị ka isi iyi nke bio-energy maka ọkụ na ime achịcha n'ime icheku ọkụ.

Ihe onwunwe

Ogologo eriri nke eriri cellulose bụ ihe kachasị mkpa nke pulpwood ma na-ekpebi ihe a ga-eji mee ihe. Nkewa mbụ bụ n'ime osisi dị nro na osisi siri ike, nke nwere eriri ogologo na nke dị mkpirikpi. N'ime akwụkwọ mmepụta fiber site na softwood na-enye ike na eriri sitere na hardwood na-eme ka opacity.

Ebe e si nweta ya

Ịchụ osisi

N'ịkụ osisi nke osisi ndị a gwakọtara agwakọta, a na-ejikarị osisi ndị ka mma eme ihe maka mmepụta osisi, ebe a na-ewepụta osisi na ihe ndị dị ala maka mmepụta pulpwood. Osisi pulp na-esikarị n'ụdị osisi anọ n'ọrụ ịkpụ osisi:

• Osisi ndị na-eto n'èzí, nke nwere alaka dị ukwuu n'okpuru ogwe osisi ahụ, wee mee ka osisi ndị na-adịghị mma.
• Osisi ndị nwụrụ anwụ ma ọ bụ ndị na-arịa ọrịa.
• Elu osisi ndị a na-ewepụta maka osisi (a naghị eji alaka osisi eme ihe ebe ọ bụ na ha nwere obere osisi a na-eji eme ihe mgbe ewepụchara ụgbụgbọ osisi ahụ).
• Obere osisi, nke pere mpe iji wepụta osisi.

A pụkwara iweghachite osisi ndị sitere n'okike naanị maka osisi pulpwood ebe, maka ihe dị iche iche, uru nke osisi dị ka osisi dị ala. Nke a nwere ike ịbụ n'ihi ụdị ndị a ma ama n'ọhịa (dịka ọmụmaatụ, ụfọdụ ọhịa aspen n'ebe ugwu North America), ma ọ bụ n'ihi ịdị nso nke ebe a na-awa osisi ma ọ bụ ihe igwe ihe.

Ubi osisi

A na-ewepụkwa osisi pulpwood site na ugbo osisi ndị e guzobere maka ebumnuche a kapịrị ọnụ nke ịzụlite osisi pulp, na obere ma ọ bụ obere mmepụta osisi. Monoculture nke ụdị ndị e bu n'uche maka pulpwood gụnyere loblolly na slash pine na ndịda USA; ụdị dị iche iche nke eucalyptus (nke a na-ahụkarị Eucalyptus globulus na Eucalyptis grandis) na Latin America, Iberian Peninsula, Australia, ndịda ọwụwa anyanwụ Eshia na ndịda Afrịka na acacia (nke a ma ama Acacia mangium) na ndịda ọ bụ ndịda Afríku.

Mkpụrụ osisi ndị a na-egbute

A na-ejikarị mgbatị mgbatịa mgbe ọkụ ọhịa, tornadoes, hurricanes, ma ọ bụ ọdachi ndị ọzọ na-emere onwe ha eme ihe maka osisi pulpwood. Isi iyi ọzọ nke osisi maka iji na Kraft pulping bụ osisi a na-enweta site na mmebi, nhazi ụlọ ọrụ nke osisi na pallets osisi.y

Osisi ndị fọdụrụnụ

A na-eji ihe ndị fọdụrụnụ eme ihe dị ka osisi pulp. Ihe kachasị mkpa n'ime ndị a bụ akụkụ ndị e gbuturu site na ọnụ osisi. Nke a na-enye osisi nwere ihe fọrọ nke nta ka ọ bụrụ naanị osisi sap na enweghị osisi obi. Osisi sapwood dị mfe ịkpụ. n'ihi ọdịdị na-emeghe na obere ọdịnaya nke ihe na-ewepụta karịa osisi etiti.^[2] Ogologo eriri nke sapwood na-adịkarị ogologo karịa ogologo eriri nke heartwood. Osisi sapwood na-adịkarị arọ ma nke ahụ bụ uru mgbe ị na-emepụta pulp na-arụ ọrụ dịka ọ dị mkpa ka ọ ghara ịdị ọcha nke pulp osisi.

N'oge gara aga [nkọwa dị mkpa] sawdust nwere obere ojiji na mmepụta akwụkwọ. Ọ na-enye eriri dị mkpirikpi nke dabara adaba dị ka akụkụ nke arịa maka akwụkwọ na akwụkwọ edemede. Akpụkpọ anụ a na-akpụ akpụ aghọwo ihe dị gịrịgịrị ma nwee obere ezé na-eme ka ọkpụkpụ a na-akwa akwa dị obere dị ka isi iyi fiber.^[3]

Osisi Pulpwood

Osisi pulpwood dị mkpa n'ụzọ akụ na ụba

• Osisi siri ike

Akasia

Aspen

Birch

Eucalyptus

Maple

Pacific Albus na osisi rọba

• Osisi ndị dị nro

Pine

Osisi Spruce

Ihe ndị mejupụtara osisi pulpwood ụfọdụ

Ihe ndị mejupụtara osisi pulpwood (%)[4]
Osisi	Cellulose	Lignin	Mannan	Ndị Arab	Xylan
Aspen	56.5	16.3	2.3	0.4	16.0
Akwụkwọ Birch	44.5	18.9	1.5	0.5	24.6
Maple na-acha ọbara ọbara	44.8	24	3.5	0.5	17.3
Balsam fir	47.7	29.4	12.4	0.5	4.8
Jack pine	45.0	28.6	10.8	1.4	7.1
Nnụnụ na-acha ọcha	48.5	27.1	11.6	1.6	6.8

Ihe ndị ọzọ

A na-eji ihe ndị na-emepụta okpete na achara eme ihe na mmepụta akwụkwọ mposi.

Hụkwa

• Mpempe akwụkwọ
• Ihe igwe ihe
• Ngwunye akwụkwọ
• Osisi

Ihe odide

1. Martin (2004). Paper Chase. Ecology Communications, Inc.. Archived from the original on 2007-06-19. Retrieved on 2007-09-21.
2. (1999) "3", in Gullichsen: Forest Products Chemistry, Paper making Science and Technology. Helsinki, Finland: Capet YO. ISBN 952-5216-06-3. 
3. Biermann (1993). Essentials of Pulping and Paper making. San Diego: Academic Press, Inc.. ISBN 0-12-097360-X. 
4. Robert Summit, Alan Sliker. 1980. "Handbook of Materials Science, Volume IV: Wood". Florida: CRC Press, Inc.