1994年7月15日,德国联邦政府颁布了《食品及日用品消费品法》(LFGB)第二修正案,法案禁止使用可以通过一个或多个偶氮基分解形成MAK(Ⅲ)A1或A2组芳胺类,总计20种芳胺,其中包括3,3’-二氯联苯胺(DCB),加上欧共体EU67/1548附录C2级两个芳...1994年7月15日,德国联邦政府颁布了《食品及日用品消费品法》(LFGB)第二修正案,法案禁止使用可以通过一个或多个偶氮基分解形成MAK(Ⅲ)A1或A2组芳胺类,总计20种芳胺,其中包括3,3’-二氯联苯胺(DCB),加上欧共体EU67/1548附录C2级两个芳香胺以及STANDARD 100 by OEKO-TEX增加两个,共24个涉嫌致癌芳胺(包括我国在内的各国法规都是这些芳香胺)。但1994年后所使用的检测方法无法检出以DCB为中间体的有机颜料,因为以DCB为中间体的有机颜料在1996年7月23日颁布的第五修正案的法定分析条件下不会断裂分解,因此其使用不受限制。直到2002年11月欧盟出台了欧洲标准EN 14361-2:2003,使用萃取样品预处理方法,使其还原分解出DCB,才能执行法案禁用以DCB为中间体的有机颜料。展开更多
Double cantilever beam tests were used to measure the energy release rates of linear vibrational welded moso bamboo joints.The influence of the length of the preserved cracks,the different combinations of the inner an...Double cantilever beam tests were used to measure the energy release rates of linear vibrational welded moso bamboo joints.The influence of the length of the preserved cracks,the different combinations of the inner and outer bamboo surfaces and the moisture content is studied herein.The experimental compliance method,which is based on linear elastic fracture mechanics and has been shown to be an ideal method,was used to analyze data with the power equation.The results show that the preserved initial crack length does not have a significant effect on the final measured energy release rate,while the moso bamboo combination does affect the properties dramatically.The welded moso bamboo joints with inner-inner surfaces have the highest energy release rate of 122 J/m^2.The average energy release of the outer-outer combination was only 102 J/m^2.The expansion of the cracks also became easier when the moisture content of the welded joints was 18.5%compared to 4.5% and 10.1%.So the moisture resistance of the welded joints should be duly improved.展开更多
文摘1994年7月15日,德国联邦政府颁布了《食品及日用品消费品法》(LFGB)第二修正案,法案禁止使用可以通过一个或多个偶氮基分解形成MAK(Ⅲ)A1或A2组芳胺类,总计20种芳胺,其中包括3,3’-二氯联苯胺(DCB),加上欧共体EU67/1548附录C2级两个芳香胺以及STANDARD 100 by OEKO-TEX增加两个,共24个涉嫌致癌芳胺(包括我国在内的各国法规都是这些芳香胺)。但1994年后所使用的检测方法无法检出以DCB为中间体的有机颜料,因为以DCB为中间体的有机颜料在1996年7月23日颁布的第五修正案的法定分析条件下不会断裂分解,因此其使用不受限制。直到2002年11月欧盟出台了欧洲标准EN 14361-2:2003,使用萃取样品预处理方法,使其还原分解出DCB,才能执行法案禁用以DCB为中间体的有机颜料。
文摘Double cantilever beam tests were used to measure the energy release rates of linear vibrational welded moso bamboo joints.The influence of the length of the preserved cracks,the different combinations of the inner and outer bamboo surfaces and the moisture content is studied herein.The experimental compliance method,which is based on linear elastic fracture mechanics and has been shown to be an ideal method,was used to analyze data with the power equation.The results show that the preserved initial crack length does not have a significant effect on the final measured energy release rate,while the moso bamboo combination does affect the properties dramatically.The welded moso bamboo joints with inner-inner surfaces have the highest energy release rate of 122 J/m^2.The average energy release of the outer-outer combination was only 102 J/m^2.The expansion of the cracks also became easier when the moisture content of the welded joints was 18.5%compared to 4.5% and 10.1%.So the moisture resistance of the welded joints should be duly improved.
