The results showed that rock tensile strength of sample with a diameter of 25 mm and a length of 25mm treated by drilling fluid was higher than that of untreated rock samples with a diameter of 50mm and a length of 50mm.
在考虑试验岩样尺度效应的基础上,进行的模拟地层条件下钻井液对岩石力学性质影响的试验研究结果表明:经钻井液处理后的25mm×25mm岩样的抗张强度高于未经钻井液处理的50mm×50mm岩样,且处理后的岩样抗张强度均高于未处理的岩样。
The improvements of packaging paper strengths,including stiffness,ring crush compression resistance,folding endurance and tensile strength,by novel strengthening agents was investigated.
该文探讨了用新型增强剂提高纸页的包装强度:挺度、环压强度、耐折度、抗张强度;比较了几种增强剂对提高纸页包装强度的效果,确定了最合适的增强剂及用量,并研究了最合适的增强剂对不同纸浆、不同定量纸页包装强度的影响,确定采用4号增强剂且用量为0。
The results showed that the brightness of the hand-sheets decreased with increasing dosage of SDS;and the tensile strength of hand-sheets increased first with increasing charge of SDS,then decreased;however,the tearing strength of the hand-sheets decreased first with the increasing dosage of SDS and then increased;the air permeability of the hand-sheets reached maximum at a certain dosa.
研究表明,纸页的白度随非离子瓜尔胶浓度的增加而降低;抗张强度先随非离子瓜尔胶添加量的增大而增大其后随之下降;撕裂度先随非离子瓜尔胶用量的升高而下降其后随之提高;透气度先随非离子瓜尔胶用量的升高而增加达到一个峰值后又降低。
Moreover, the tensile index of the non-asbestos sheet made of the PPTA fibers which was refined for 20000 .
研究表明,芳纶纤维具有高的Zeta电位,呈现强负电性;随着磨浆转数提高,其打浆度逐渐增加,负电性逐渐下降;在磨浆转数为20000转时,纤维长度和粗度明显减小,细纤维化显著,打浆度为30oSR,此时用该芳纶纤维配抄的无石棉胶乳抄取板的抗张指数达到最大值。
As a result, paper's uniformity improve evidently , consequently , the tensile index and tear index of Aramid 1313 Paper increase as well.
本次实验研究了PEO在化学纤维芳纶1313纸页成形过程中的应用情况,结果表明,通过在浆料体系中加入适量PEO,芳纶纸页匀度有了明显改善,从而使纸页的抗张指数和撕裂指数有了显著提高。
It was indicated that the tensile index of this kind of paper was increased.
结果表明,经过处理的短切纤维抄造而成的芳纶1313纤维纸页的抗张指数得到了提高。