革屑的球磨粉碎对天然橡胶乳胶合板强度的影响分析
Effect of Ball Mill Grinding on the Strength of Leather Scrap Plywood with Natural Latex
作者：马英华, 辛东升, 欧亚丽, 丁绍兰, 马飞
Author：MA Yinghua, XIN Dongsheng, OU Yali, DING Shaolan, MA Fei
收稿日期：2019-08-12 年卷（期）页码：2020,30(1):37-42
期刊名称：皮革科学与工程
Journal Name：Leather Science and Engineering
关键字：革屑,粉碎,形貌,天然橡胶,抗张强度,崩破强度,
Key words：leather shavings,crushed method,the shape,natural latex,tensile strength,collapse strength,
基金项目：河北省高等学校自然科学研究重点项目（ZD2019119）
中文摘要
以牛皮铬鞣革屑为原材料,以天然橡胶胶乳为胶粘剂,采用热压法制备革屑胶合板（LSP),主要探索革屑的球磨粉碎方式对LSP抗张强度和崩破强度的影响。研究发现,单向转的e球、c球、i球粉碎方式对革屑内部纤维结构有不同程度的破坏;双向转的6球、3球、9球粉碎方式对革屑胶原纤维破坏严重;当球数、转速、时间都相同,分别采用单向转和双向转时,2球、4球、5球、6球、8球均比对应的双向转方式粉碎的革屑的“絮状”细碎、色浅、纤维被破坏程度大。LSP的抗张强度和断裂伸长率随革屑尺寸变小而增大;LSP的崩破强度与革屑的粉碎方式和形貌无关,崩破高度随革屑尺寸变大而增大。
英文摘要
The leather scrap plywood (LSP) was prepared by hot pressing method. During processing, the abandoned cow leather shavings after chrome tanning were used as raw materials, the natural high ammonia latex 60% DRC(HA) was used as adhesive. Further, the effect of ball mill grinding for leather shavings on the strength of LSP was studied. The study founded the e-ball, c-ball and i-ball methods of one-way turning had different degrees of damage to the internal fiber structure of the leather shavings. The 6-ball, 3-ball and 9-ballmethods of two -ways turning seriously damaged the collagen fibers of leather shavings. When the number of balls, the speed and the time kept the same, one-way and two-way turning were used, respectively, the "floc" of leather shavings crushed by the 2-ball method was more finely divided, the color was lighter, and the fiber was destroyed more than the b-ball method. The 4-ball, 5-ball, 6-ball, 8-ball methods had the same result. When the leather shavings size was smaller, the tensile strength and elongation at break of LSP would be increased. There was no correlation between the collapse strength of LSP and the way of crushing method and the shape of the shavings. When the size of the shavings was bigger, the effect was to increase the rupture height of LSP.
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