Standard No.:	GB/T 458-2008
English Name:	Paper and board - Determination of air permeance
Chinese Name:	纸和纸板透气度的测定
Chinese Classification:	Y30    Papermaking in general
Professional Classification:	GB    National Standard
Issued by:	AQSIQ; SAC
Issued on:	2008-8-19
Implemented on:	2009-5-1
Status:	valid
Superseding:	GB/T 458-2002 Paper and board--Determination of air permeance (Schopper method） GB/T 5402-2003 Raper and board—Determination of air peremeance(medium range)—Gurley method GB/T 2679.13-1996 Paper and board-Determination of air permeance (medium range)-Bendtsen method
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	80.00
Delivery:	via email in 1 business day

本标准是对GB/T 458-2002《纸和纸板透气度的测定（肖伯尔法）》、GB/T 2679.13-1996《纸和纸板透气度的测定（中等范围）本特生法》和GB/T 5402-2003《纸和纸透气度的测定（中等范围）葛尔莱法》三项标准的整合修订，并代替以上三项标准。
本标准规定了纸和纸板透气度的三种测定方法：葛尔莱法、肖伯尔法、本特生法。
本标准适用于透气度在1×10-2u m／(Pa·s)～1×102 u m／(Pa·s)之间的纸和纸板。
本标准不适用于表面粗糙度较大，且不能被牢固夹紧的纸和纸板，如皱纹纸或瓦楞纸板。
本标准与GB/T 2679.13-1996、GB/T 458-2002和GB/T 5402-2003相比，有如下变化：
——将仪器结构及工作原理以附录的形式加以介绍，以利于本标准主体的条理性；
——在葛尔莱方法中，因仪器过时，故将夹板上置型仪器删除，相关标准内容也予以相应删减，请使用本标准的各方注意相关变化。

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Measurement procedures of Gurley method
5 Measurement procedures of Schopper method
6 Measurement procedures of Bendtsen method
7 Test report
APPENDIX A (Normative) Gurley air permeance tester
APPENDIX B (Normative) Schopper air permeance tester
Appendix C (Normative) Bendtsen air permeance tester