ASTM D3359-09 标准试验方法 胶带法测量附着力(5)

2019-01-12 17:00

Nearly linear increases were observed in peel force approaching 100 % as peel angle was changed from 135 to 180, and similar large differences can be expected in peel force as peel rate varies.

近线性增加,剥离力,剥离角度改变,从135到180,和类似的差异较大,可以预计,剥离力,剥离率变化接近100%

These effects are related as they reflect certain rheological properties of the backing and adhesive that are molecular in origin.

这些影响有关,因为它们反映了某些流变性能的粘合剂,是起源于分子和支持。

Variation in pull rate and peel angle can effect large differences in test values and must be minimized to assure reproducibility

在拉率和剥离角的变化可以影响测试值差异较大,必须最小化,以保证可重复性

X1.6.3 Visual Assessment:可视化评定

The final step in the test is visual assessment of the coating removed from the specimen, which is subjective in nature, sothat the coatings can vary among individuals evaluating the same specimen .

在测试的最后一步是去掉涂层的标本,这是在自然界中,充分使用的涂料,可以有所不同评价同一标本的个人主观视觉评价

X1.6.3.1 Performance in the tape test is based on the amount of coating removed compared to a descriptive scale. The exposure of the substrate can be due to factors other than coating adhesion, including that arising from the requirement that the coating be cut (hence the synonym“ cross-hatch adhesion test”). Justification for the cutting step is reasonable as cutting provides a free edge from which peeling can begin without having to overcome the cohesive strength of the coating layer.

胶带测试中的性能的基础上涂布量删除一个描述性的规模相比。基板的暴露可能是由于其他因素,比涂层的附着力,包括从该涂料被削减(因此“交叉开口附着力测试”的代名词)的要求而产生。切割步骤的理由是合理的切割提供了一个自由的边缘脱皮从中可以开始,无需克服了涂层的粘结强度。

X1.6.3.2 Cutting might be suitable for coatings applied to metal substrates, but for coatings applied to plastics or wood, the process can lead to a misleading indication of poor adhesion due to the unique interfacial zone. For coatings on soft substrates, issues include how deep should this cut penetrate, and is it possible to cut only to the interface? 切割可能适合应用于金属基材的涂料,但应用于塑料或木材涂料,这个过程可以导致误导的附着力差,由于独特的界面区的指示。软性基板上的涂料,问题包括切渗透有多深,它可能只削减到接口?

X1.6.3.3 In general, if adhesion test panels are examined microscopically, it is often clearly evident that the coating removal results from substrate failure at or below the interface, and not from the adhesive failure between the coating and the substrate. Cohesive failure within the coating film is also frequently observed. However, with the tape test, failures within the substrate or coating layers are rare because the tape

adhesive is not usually strong enough to exceed the cohesive strengths of normal substrates and organic coatings. Although some rather brittle coatings may exhibit cohesive failure, the

tape test adhesion method does not make provision for giving failure locality

在一般情况下,如果显微镜检查附着力测试板,它往往是显而易见的,从失败的接口或低于基材涂层去除结果,而不是从涂层与基材之间的粘接失败。内涂膜的凝聚力失败也经常出现。然而,用胶带测试,在基材或涂层的失败是罕见的,因为磁带粘合剂通常没有强大到足以超过正常基板和有机涂层的凝聚力优势。虽然一些比较脆的涂料可能具有凝聚力的失败,胶带测试附着力的方法不提供给失败的地方

X1.6.4 Use of the test method in the field can lead to variation in test results due to temperature and humidity changes and their effect upon tape, coating and substrate.

在该领域的测试方法的使用可以导致由于温度和湿度的变化后,胶带的涂层和基体的在测试结果中的变化。

X1.7 Conclusion

X1.7.1 All the issues aside, if these test methods are used within the Scope Section and are performed carefully, some in sight into the approximate, relative level of adhesion can be gained.

抛开所有的问题,如果这些测试方法的使用在范围内以及认真执行,一些成近似在眼前,附着力相对水平可以得到。

REFERENCES 参考书目

(1) Mittal, K. L., “Adhesion Measurement: Recent Progress, Unsolved Problems, and Prospects”,

“Adhesion Measurement of Thin Films, Thick Films, and Bulk Coatings,”ASTM STP 640, ASTM, 1978, pp.7–8. (2) Corcoron, E. M.,“Adhesion,”Chapter 5.3, Paint Testing Manual, 13th ed.,ASTM STP 500, ASTM, 1972, pp. 314–332.

(3) Gardner, H. A., and Sward, G. G., Paint Testing Manual, 12th ed.,Chapter 7, Gardner Laboratory, Bethesda, MD, 1962, pp. 159–170.

(4) Mittal, K. L., Journal of Adhesion Science and Technology, Vol 1, No.3, 1987, pp. 247–259. (5) Stoffer, J. O., and Gadodia, S. K., American Paint and Coatings Journal, Vol 70, Nos. 50 and 51, 1991, pp. 36–40 and 36–51,respectively.

(6) Souheng, Wu, Polymer Interface and Adhesion, Marcel Dekker, Inc.,New York, NY, 1982, p. 531. (7) Nelson, G. L., Gray, K. N., and Buckley, S. E., Modern Paint and Coatings, Vol 75, No. 10, 1985, pp. 160–172.

(8) Nelson, G. L., and Gray, K. N., “Coating Adhesion to Plastics,”Proceedings, Waterborne and Higher Solids Coatings Symposium, Vol 13, New Orleans, LA, February 5–7, 1986, pp. 114–131.

(9) K. L. Mittal, ed., “Symposium on Adhesion Aspects of Polymeric Coatings,” Proceedings, The Electrochemical Society, 1981, pp. 569–582.

SUMMARY OF CHANGES 摘要变化

Committee D01 has identified the location of selected changes to this standard since the

last issue (D 3359 - 97) that may impact the use of this standard.

生产单位委员会选定的地点已经确定改变这一问题,自去年标准(D3359-97)可能影响使用这一标准. (1) Deleted reference to Test Method D 2197 in Referenced Documents section and editorially changed footnote 10 to avoid confusion with another adhesion test method.

(2) Added 7.1.1, 8.5, 12.1.1, and 13.4 to clarify use when testing samples that have been immersed.

删除D2197测试方法,参照上述文件的第10注和编辑修改,以免造成与另一种试验方法的混淆 (二)增加7.1.1,8.5,12.1.1,13.4,说明测试样品时使用,一直浸泡.


ASTM D3359-09 标准试验方法 胶带法测量附着力(5).doc 将本文的Word文档下载到电脑 下载失败或者文档不完整,请联系客服人员解决!

下一篇:关于我院2015年各级各类医师学习考试内容和考核形式的通知 - 图

相关阅读
本类排行
× 注册会员免费下载(下载后可以自由复制和排版)

马上注册会员

注:下载文档有可能“只有目录或者内容不全”等情况,请下载之前注意辨别,如果您已付费且无法下载或内容有问题,请联系我们协助你处理。
微信: QQ: