GB/T 9774-2020Sacks for packing cement (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This standard replaces GB/T 9774-2010 "Cement Packaging Bags". Compared with GB/T 9774-2010, the main technical changes are as follows.

---Modified the classification and deleted the bottom bag type (see 3.1, 3.1 in the 2010 edition);

---Deleted the bottom bag code (see 3.3.2 of the 2010 edition);

--- Deleted the naming (see 3.4 in the 2010 edition);

---Modified the bag-making materials and increased the quality requirements of the laminated film (see 4.3, 4.3 in the 2010 edition);

---Added bag type requirements (see 5.2);

---Modified the physical and mechanical properties of laminated plastic woven bags and paper-plastic composite bags (see 5.3, 5.2 in the 2010 edition);

---Modified the applicable temperature (see 5.4, 5.3 of the 2010 edition);

---Revised the firmness requirements (see 5.5, 5.4 of the 2010 edition);

---Added the bag type test method (see 6.2);

---Modified the test method of mass per unit area (see 6.3, 6.2 of the 2010 edition);

--- The inspection report is deleted (see 7.6 of the 2010 edition);

---The arbitration is deleted (see 7.7 of the 2010 edition);

--- Deleted the newly developed packaging bag approval (see 7.8 in the 2010 edition);

---Modified the adaptability test of packaging bag filling process (see 9.2, 9.2 in 2010 edition);

---Modified the bottom width and allowable deviation of the bag, deleted the basic size of the bottom sewing bag (see Appendix A, Appendix A of the 2010 edition);

---Modified the method of making pouches (see D.4.1 in Appendix D, D.3.1 in Appendix D of the 2010 edition);

---Modified the pouch production method and pouch maintenance system (see E.4.1 and E.4.3 in Appendix E, and E.4.1 and E.4.1 in Appendix E of the 2010 edition. E.4.3).

1 Scope

This standard specifies the classification, specification, marking and layout printing, bag making materials, technical requirements, test methods, and inspection regulations for cement packaging bags. Rules, signs, packaging, transportation and storage, acceptance inspection.

This standard is applicable to various types of cement packaging bags with a weight not exceeding 50kg.

2 Normative references

The following documents are indispensable for the application of this document. For dated reference documents, only the dated version applies to this document. For undated references, the latest version (including all amendments) applies to this document.

GB 175 General Portland Cement

GB/T 7968 paper bag paper

GB/T 8946 General technical requirements for plastic woven bags

GB/T 17671 Cement mortar strength inspection method (ISO method)

GB/T 24287 Stretchable paper bag paper

3 Classification, specifications, marking and layout printing