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纸浆种类及用途

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发表于 2011-11-15 13:53:54 | 显示全部楼层 |阅读模式
1.机械木浆(MECHANICALWOOD-PULP)
  机械木浆亦称磨木浆,是利用机械方法磨解纤维原料制成的纸浆。它在造纸工业中占有重要的地位。它的生产成本低,生产过程简单,成纸的吸墨性强,不透明度高,纸张软而平滑。  纸浆制品适宜印刷上的要求。但由于纤维短,非纤维素组份含量高,所以成纸强度低。另外由于木材中的木素和其他非纤维素绝大部分未被除去,用其生产的纸张易变黄发脆,不能长期保存。
  机械木浆通常指白色机械木浆和褐色机械木浆两种。白色机械木浆主要用于生产新闻纸,也可配入其他纸浆中抄制书写纸和印刷纸;褐色机械木浆多用于生产包装纸和纸板,特别是工业用纸板。
  2.硫酸盐木浆(SULPHATEWOODPULP)
  硫酸盐木浆是采用氢氧化钠和硫化钠混合液为蒸煮剂。在蒸煮过程中,因为药液作用比较和缓,纤维未受强烈侵蚀,故强韧有力,所制成的纸,其耐折、耐破和撕裂强度极好。它一般可分为漂白和未漂两种。未漂硫酸盐木浆可供制造牛皮纸、纸袋纸、牛皮箱板纸及一般的包装纸和纸板等。漂白硫酸盐木浆可供制造高级印刷纸、画报纸、胶版纸和书写纸等。
  3.亚硫酸盐木浆(SULPHITEWOODPULP)
  亚硫酸盐木浆是以亚硫酸和酸性亚硫酸盐的混合液为蒸煮剂。该浆的纤维较长,性质柔软,韧性好,强度大,容易漂白,并有极好的交织能力。依其精制程度可分为未漂、半漂和漂白三种。
  未漂浆因含少量木素和有色杂质,所以呈黄色,纤维也较硬,多用于抄造中等印刷纸、薄包装纸以及半透明纸和防油纸。
  半漂浆中含有大量的多缩戊糖,因此抄造透明的描图纸和仿羊皮纸等。
  漂白浆的纤维洁白,质地纯洁而柔软,但由于经过漂白处理,纤维强度低于未漂浆。此种浆多用以抄造各种高级纸。
  4.废纸纸浆(WASTEPAPERPULP)
  废纸纸浆系利用使用过的废纸或印刷厂裁切下的纸边为原料,经过机械力量搅拌并经漂白或脱墨处理而制成的。
  废纸纸浆的纤维强度和性能,是废纸所用的纸浆种类决定的。但是由于纤维再次遭受药液侵蚀,或受机械力的损伤,所以较原来纤维性质为差。根据废纸纸浆原废纸的质量高低,分别用于抄造印刷纸、书写纸、纸板及较低档的纸张。
  除上述介绍的几种纸浆外,还有稻草浆、苇浆、蔗渣浆、竹浆、棉浆、麻浆及合成纸浆等。
发表于 2011-11-20 21:37:05 | 显示全部楼层
楼主辛苦了。
发表于 2012-6-25 16:52:32 | 显示全部楼层
不错,顶!!!!
发表于 2013-1-15 15:14:15 | 显示全部楼层
楼主辛苦了。
发表于 2013-2-20 10:42:26 | 显示全部楼层
多谢楼主!
发表于 2013-3-11 12:51:46 | 显示全部楼层

Hmm

骑士的牺牲追根究底还不是一个;情;字?!
圣女贞德可以率领千军万马统领帝国,只因骑士的牺牲
月日的今天,让我看见也明白古今往来,骑士为了公主战死沙场的英雄事迹从何而来
Hmm… 又来到这里爆出秘密事情嘻嘻
即使如此生气,睡一觉醒来亦为你心烦为你忧…
自古忠臣总被弃,反得小人长戚戚
只因…是你
不愿听取实话!!谎话连篇你当实话来听,告诉你实话却鄙视他人~
只是你耿耿于怀!而他人已经往前走!
悲也泣也
转牛角尖的你,看不见整体事件; 保护你的那些人 亦 不愿教导你
其实common sense的说,过去的就让它过去,为何耿耿于怀
只想着有人会帮你出头!帮你做事!
已经不愿意面对这个世界!
哈!离题了~ 回来 回来~~
过去的伤害过你,为何还要让它染指你的未来?
已经不是说你被呵护在温室里的小花,而是说你已经被宠坏!
所谓的阴影,都是懦弱的人不敢去面对而说出的一个借口
没有,因为也没必要,别人给你的习惯,你早已不知道 为他人着想为何物
不能成长亦不能生存!令人担心 却又 令人气愤
过去单纯天真被人骗,谁人何尝不是?!!
自私自利的你,有没有站在别人的角度想过?
这篇虽然还是会被其他人看见,冒着被人摒弃的危险我也要说啦!
问世间情为何物,为何叫人死不瞑目!
发表于 2013-3-17 02:48:21 | 显示全部楼层

Cadillac's CTS-V.

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Here are ten simple remedies and lifestyle changes for families. I suggest parents try to Lead By Example and Create A Healthy Eating Environment so kids will pick up better eating habits and make better choices on their own.
发表于 2013-3-17 03:25:34 | 显示全部楼层

TSU came &quot

in the Democratic Progressive Party tried to convince four big occasion, TSU came "Rushmore", relaxation method for correction to join the party, members of the Democratic Progressive Party to join the tsu.The TSU move,casque beats, the DPP's "Legislative Yuan" party secretary Lai Qingde requirements TSU do not seize every opportunity, the opportunity to expand their own.Democratic Progressive Party Secretary General Chen Jingjun is calling for a TSU "don't take up internal friction, ideology," said the DPP and TSU in the "Legislative Yuan&quot,doudoune moncler; of a total of only one hundred and one seats, Li Denghui's more than ten years, more than half of the Kuomintang and stable support to the main, objective difficulty, and Chen Shuibian today?(Juan Zi)
according to Taiwan media reports, "bian-soong meeting" already touched the pan-green camp "pro-independence" nerve, Tuesday the four &quot,ray ban;pro-independence" Tate, Huang Zhaotang and Jin Mei Ling Qi, &quot,abercrombie;" national policy advisors "post,air jordan, Wu Lipei also resigned from the&quot,casque dr dre; presidential advisor "position,&quot,hollister france; green storm "blew the DPP position is a bit rickety, Chen Shuibian busy ordered an all-out effort to convince,abercrombie france.The Democratic Progressive Party also appealed to maintain internal security and repel foreign invasion, insisted that does not and the "pro-independence" draw the line.
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"Ms. Pansieri will replace Ms. Kyung-wha Kang, to whom the secretary-general and the High Commissioner for Human Rights are grateful for her dedicated service to the United Nations human rights program during the past six years," said a statement issued here by Ban's spokesperson.
发表于 2013-3-17 05:28:12 | 显示全部楼层

Nowadays, there

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发表于 2013-3-18 19:45:32 | 显示全部楼层
楼主辛苦了。
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