用户名: 密码:    忘记密码   注册   在线充值
热熔胶粘剂的热稳定性用标准试验方法  
 【英文标准名称】  Standard Test Method for Heat Stability of Hot-Melt Adhesives
 【原文标准名称】  热熔胶粘剂的热稳定性用标准试验方法
 【标准号】  ASTM D4499-2007
 【标准状态】  Active
 【国别】  
 【发布日期】  2007
 【实施或试行日期】  
 【发布单位】  美国材料与试验协会(US-ASTM)
 【起草单位】  D14.50
 【标准类型】  (Test Method)
 【标准水平】  ()
 【中文主题词】  胶粘剂;测试
 【英文主题词】  color; heat stability; hot-melt adhesive; melt viscosity; phase separation; skin formation
 【摘要】  

Hot-melt adhesives must generally be applied at relatively high temperatures in order that the adhesive viscosity is low enough that it can be readily handled in typical hot-melt equipment. Changes in the adhesive caused by exposure to the severe environment required during hot-melt processing will disrupt the adhesive application process and may affect the quality of the adhesive bond. Changes in adhesive viscosity may affect the quantity of adhesive dispensed by the applicator. Phase separation or changes in viscosity and color may be an indication of changes occurring in the adhesive which could affect the quality of the adhesive joint. A skin formed on the adhesive may eventually clog the applicator nozzle or die.

The data generated in this test procedure are comparative in nature. Results can be useful in observing batch-to-batch variation or relative thermal stability of alternate adhesive formulations. Results can also be useful in selecting application equipment and establishing operating conditions for satisfactory handling of a particular hot-melt adhesive.

Round-robin testing showed that the reproducibility of this test method can depend strongly on the characteristics of the adhesive being tested. Results showed that, for the particular adhesives tested in the round robin, the test method was well suited for testing the heat stability of the adhesives based on an EVA copolymer, a polyolefin, and a polyamide. However, because of poor reproducibility, the test method proved to be unsuitable for assessing the heat stability of the adhesive based on a block copolymer. Precision of this test method is discussed in Section 11.

1.1 This test method covers the evaluation of hot-melt adhesives with respect to the change in properties that occurs while the adhesive is aged in the molten state during hot-melt application. Melt properties monitored are viscosity, color, skin formation, and phase separation.

1.2 The values stated in SI units are to be regarded as the standard.

This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 【中国标准分类号】  G39
 【国际标准分类号】  83_180
 【页数】  5P.;A4
 【正文语种】  
索取全文
标准全文由山东省标准化研究院向您提供(不能使用知网账号下载全文),需向山东省标准化研究院支付相关费用后,方可获得标准。

 

       

标准间关联  
本领域专利与科技成果  
本标准研制背景
本标准应用动态
所涉核心技术研究动态
京ICP证040431号 互联网出版许可证 新出网证(京)字008号 京公网安备11010802014875号
© 2014中国知网(CNKI) 《中国学术期刊(光盘版)》电子杂志社有限公司
服务热线:400-810-9888 订卡热线:800-810-6613
在线咨询:http://help.cnki.net 客服中心:http://service.cnki.net 电子邮件:help@cnki.net