1 Scope
This standard specifies classification, material, requirements, test methods, inspection rules, marking, packaging, transportation and storage as well as application.
This standard is applicable to various sacks for packing cement with loading mass less than or equal to 50kg.
2 Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments to (excluding corrigenda), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest edition of the normative document applies.
GB 175 Common Portland Cement
GB/T 7968 Bag Paper
GB/T 8947 Composite Plastic Woven Sack
GB/T 17671-1999 Method of Testing Cements - Determination of Strength (idt ISO 679:1989)
QB/T 1460 Extensible Bag Paper
3 Classification, Specification and Basic Size as well as Code, Designation and Layout Printing
3.1 Classification
3.1.1 Sacks for packing cement are classified into paper sack, laminating plastic woven bag and composite sack.
3.1.2 Sacks for packing cement are classified into bottom-pasted sack and bottom-stitched sack according to making process; thereinto, all paper sacks are bottom-pasted ones while laminating plastic woven bag and composite bag are classified into bottom-pasted and bottom-stitched types. The bottom-pasted sack is classified into adhesion and heat sealing by its process.
