耐折度

与商品两性及阳离子淀粉比较，改性PAM在提高纸张强度方面有很好的效果，尤其是在提高纸张耐折度方面显现出明显优势。

Compared with cationic and amphoteric starches , modified PAM has obvious advantages in strength improvement , especially in the folding strength of paper .

m（乙二醛）/m（PVA）为0.1和改性PVA用量为1.0%时，纸张的耐折度可以提高31%，抗张强度可以提高22%；

When the m ( Glyoxal ) / m ( PVA ) is 0.1 , dosage 1 % , paper folding strength and tensile strength increased 31 % and 22 % respectively ;

GB/T2679.5-1995纸和纸板耐折度的测定（MIT耐折度仪法）

Testing method for puncture of paperboard Paper and board & Determination of folding endurance ( MIT tester )

原浆的卡伯值高对保持日本落叶松KP浆的抗张强度和裂断长有利，而对耐折度和撕裂指数不利。

If the pulp has high Kappa value , its tensile strength and breaking length are better , but its folder endurance and tearing index are less .

CMC和甘油对膜耐折度的影响均极显著（P<0.01），溶胀时间、山梨醇的影响不显著（P>0.05）。

CMC and glycerine have a significant effect on FE ( P < 0.01 ), and swelling time and sorbitol do not affect FE to a significant degree ( P > 0.05 ) .

纸张老化前后测试的性能为MIT耐折度、撕裂度、耐破度、裂断长、白度、铜价和聚合度。

The following determinations were made on the initial and aged samples : MIT folding endurance , internal tearing resistance , bursting strength , breaking length , brightness , copper number and average degree of polymerization .

m2/g，耐折度290次，紧度0.48g/cm3。四年生四倍体刺槐在41.5°SR附近，纸浆具有较好的物理性能，抗张指数70.9N。

M2 / g , folding endurance is 290 times , density is 0.48g / cm3 , while quadruple black locust ( 4 years ) pulp can achieve good paper properties , around 41.5 ° SR , tensile index is 70.9N .

结果表明APAM对纸浆的纤维结合强度有明显的作用，尤其是耐折度。

The results showed that there are obvious effects of APAM-8701 on pulps in improving fiber bonding strength , especially folding endurance .

浆的抗张指数、裂断长、耐折度和耐破指数都要好于KP浆，但是在撕裂指数上KP浆要优于ASAQ浆。

Moreover , the tensile strength index , breaking length , folding endurance and burst index of AS-AQ pulp were higher than those of KP pulp . However , the tearing index was opposite .

m2/g，耐折度270次，紧度0.49g/cm3。总的来说，四倍体刺槐比较适合SPF-AQ法制浆。

M2 / g , folding endurance is 270 times , density is 0.49g/cm3 . Generally speaking , they are both suitable for SPF-AQ process .

当改性PAE用量为1.0%，助留剂APAM加入量0.3%（相对绝干浆料），浆料pH值7~8时，成纸的湿强度可达39.8%，耐折度达3435次，裂断长达7.43km。

The wet strength of the cotton pulp can reach 39.8 % , folding endurance is 3435 ( double times ) and breaking length is 7.43 km when the dosage of EA / WEP / PAE is 1.0 % and the retention aid APAM is 0.3 % .

研究结果表明：当TDI用量10%，反应时间10min，反应温度60℃时，聚氨酯化后纸张裂断长提高了21.55%，湿强度为干强度的41.61%，耐折度提高了1.6倍；

On the conditions of dosage of TDI 10 % , reaction time 10 min and temperature 60 ℃, breaking length is elevated by 21.55 % , folding strength is raised by 1.6 times , and wet strength / dry strength is 41.61 % ;

GB/T9858-1988片基与胶片耐折度的测定方法

Method for determining the folding endurance of photographic film and film base

埃罗门多撕裂强度试验GB/T1538-1979纸板耐折度的测定法（肖伯尔式测定仪）

Elmendorf test Determination of paper board folding strength ( Shaw-bel 's )

耐折度：量度纸张对经常重复屈折的损坏程度。

Folding endurance : Measure of deterioration of paper along a constantly repeated fold .

微波干燥较普通干燥方式增加了涂布纸板的耐折度，对挺度、环压强度影响不大。

The folding strength is increased , the stiffness and ring crush strength of the board are not much influenced .

制备出几种淀粉衍生物表面施胶液，并对比了施胶后瓦楞纸的环压强度以及耐折度这两项指标。

Several starch derivatives was prepared as surface sizing agent , and then compared two indicators including ring crush strength and folding endurance .

除了耐折度有所降低外，成层结构对纸页的其它强度性能影响不大。

The stratified structure was able to enhance the surface strength of the sheet , improve the dimensional stability and diminish the yellowing .

GB/T1538-1979纸板耐折度的测定法（肖伯尔式测定仪）在维氏硬度仪上测试断裂韧性和硬度。

Determination of paper board folding strength ( Shaw-bel 's ) Their fracture toughness and hardness were determined with Vicker 's indentation test machine .

建议测量纸张老化前后的耐折度、撕裂度、白度和铜价或聚合度。

Measurements of folding endurance , internal tearing resistance , brightness , and copper number or average degree of polymerization were strongly recommended for papers before and after accelerating aging .

在满足施胶要求的前提下，施胶成本降低40元/吨纸，纸张的耐折度提高41.2%，纸张灰分含量提高1.3%～1.9%。

After using it , the cost of sizing has fall 40 yuan / ton , the degree of endure break has increased 41.2 % , the ash content of paper has increased 1.3 % ~ 1.9 % .

厘竹CTMP浆和混合废纸浆配抄出现协同效应，样品的抗张指数、耐破指数和耐折度高于两种浆各自做芯浆的样品；

The specimen 's tensile index , burst index and folding endurance were higher than the specimen with bamboo CTMP or mixture waste paper pulp as filler furnish .

随着芯浆打浆度从30°SR上升到50°SR，白板纸的抗张指数、耐破指数和耐折度不断提高，其余强度指标随样品的不同而呈现出不同的变化趋势。

With filler furnish 's beating degree going up from 30 ° SR to 50 ° SR , specimens ' tensile index , burst index and folding endurance went up , other strength properties had different changes with different specimens .

受纤维结合力影响较大的抗张强度、耐破强度和耐折度都符合这一规律。

The tensile , burst and folding strength , which are mainly affected by fiber bonding all accord with above sequence .

结果表明：漂白麦草浆回用后，打浆度、抗张强度、耐破指数、耐折度、还原糖含量均下降；

The results indicate that the pulp freeness , tensile strength , folding strength , burst index and hemi-cellulose content decrease with recycling .

结果表明，氧化淀粉能有效地提高纸张的耐破度、耐折度等物理强度。

The application result showed that the physical property of paper has obvious raise , for example , tensile strength , tearing strength , folding strength .

并将合成的助剂应用到阔叶木浆中，检测了纸张的抗张指数、耐破指数、耐折度和撕裂指数四个主要的强度指标，起到了很好的增强效果。

And we also applied the composite addition agent to the hardwood pulp , and tested the paper 's tensile index , bursting index folding endure and tearing index , and the effect were obvious .