QB/T 1460-1992 Stretchable sack paper

QB/T 1460-1992 Stretchable Paper Bag Paper QB/T1460-1992 Standard download decompression password: www.bzxz.net

Light Industry Standard of the People's Republic of China
Stretchable Paper Bags
1 Subject Content and Scope of Application
QB/T1460-1992
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, packaging, transportation and storage of stretchable paper bags. This standard applies to stretchable paper bags for packaging cement, fertilizers, pesticides, etc. after being treated by stretching devices. 2 Reference standards
GB/T450 Paper and paperboard sampling
GB/T451.1 Determination of size and deflection of paper and paperboardGB/T451.2 Determination of the weight of paper and paperboardGB/T453 Determination of the tensile strength of paper and paperboard (constant rate loading method)Determination of paper tearing resistance
GB/T 455.1
Determination of air permeability of paper and paperboard (Schober method)GB/T 458
GB/T462
GB/T 1540
GB/T 2828
Determination of moisture content of paper and paperboard
Determination of water absorption of paper and paperboard (Cobb method)Batch inspection counting sampling procedure and sampling table (applicable to inspection of continuous batches)GB/T 10342
GB/T 10739
GB/T 12914
3 Product classification
Paper packaging and marking
Standard for handling and testing of pulp, paper and paperboard Atmospheric paper and paperboard Determination of tensile strength (constant rate of extension method) Stretchable sack paper is roll paper, divided into three grades: A, B and C. 4 Technical requirements
4.1 The technical indicators of stretchable sack paper must comply with the requirements of Table 1. Table 1
Indicator name
Longitudinal tear strength
Longitudinal elongation
Water absorption
Air permeability
Not less than
Not less than
Not less than
μm/Pa·s
Approved by the Ministry of Light Industry of the People's Republic of China on April 14, 1992, Grade A
Implemented on December 1, 1992
Indicator name
Tensile energy absorption (TEA)
Delivery moisture
Transverse not less than
QB/T 1460—1992
Continued Table 1
The fiber structure of the paper sheet should be uniform, and there should be no holes, cracks, wrinkles, etc. on the paper that affect the appearance of bag making or use. Paper defects 4.2
4.3 The roll paper should be rolled according to the following requirements: 4.3.1 The paper should be rolled on a dry and hard paper core with an inner diameter of 75-80mm. c
4.3.2 The width of the roll is (1020±5)mm, and the diameter of the roll is (850±50)mm. If there are special requirements, they shall be in accordance with the agreement. 4.3.3 The two ends of the roll should be flat, with the bow shape not exceeding 15mm and the sawtooth shape not exceeding 5mm. 4.3.4 The number of broken ends of each roll A shall not exceed 1, and the rest shall not exceed 3. The joints shall be firmly glued and shall not be glued to another layer. There shall be obvious colored marks at the joints.
4.4 During the rewinding process, non-periodic and recurring paper defects that are difficult to detect, such as pulp lumps, are not allowed to exist if the maximum diameter exceeds 10mm in length.
4.5 The internal paper defects of the rolls shall not exceed 4%.
4.6 According to the requirements of the user unit, the manufacturer can produce different quantitative stretch sack paper, and its technical indicators must comply with the provisions of Table 2. Table 2
Indicator name
Allowable deviation
Longitudinal tear index
Longitudinal elongation
Water absorption 60s
Air permeability
Tensile energy absorption (TEA) index
Delivery moisture
Test method
Not less than
Not less than
Not greater than
Not less than
Not less than
5.1 The sampling of samples shall be carried out in accordance with the provisions of GB/T450. 5.2 The processing of samples shall be carried out in accordance with the provisions of GB/T10739. 5.3 The roll width shall be measured in accordance with the provisions of GB/T451.1. 5.4 The quantitative measurement shall be carried out in accordance with the provisions of GB/T451.2. Unit
mN·m2/g
μm/Pa·s
5.5 Tear strength shall be carried out in accordance with GB/T455.1. 5.6 Elongation shall be carried out in accordance with GB/T12914 or GB/T453, but arbitration shall be carried out in accordance with GB/T12914. 5.7 Water absorption shall be carried out in accordance with GB/T1540. 278
5.8 Air permeability shall be carried out in accordance with GB/T458. 5.9 Delivery moisture shall be carried out in accordance with GB/T462QB/T1460-1992
5.10 Tensile energy absorption (TEA) shall be measured in accordance with Appendix A. 5.11 Inspection of paper defects inside the roll shall be carried out in accordance with Appendix B. 6 Inspection rules
6.1 The manufacturer shall ensure that the products meet the requirements of this standard. The delivery quantity is considered as one batch, and each product shall be accompanied by a certificate of inspection. 6.2 The purchaser has the right to conduct acceptance according to the provisions of this standard. During the acceptance inspection, the outer packaging should be checked first, and then samples should be taken from it for inspection.
6.3 If the purchaser has any objection to the quality of the product, it shall notify the supplier in writing within three months after the arrival of the goods. The two parties shall jointly or entrust a third party to conduct sampling inspection. If the inspection result is judged to be unqualified, the supply and demand parties shall negotiate to resolve the problem. 6.4 The delivery sampling inspection shall be carried out in accordance with the provisions of GB/T2828. The sample unit is the roll. The delivery sampling item grouping, inspection level, sampling plan and qualified quality level (AQL) shall be carried out in accordance with the provisions of Table 3. Table 3
Sampling plan
51~150
151~500
501~3200
7 Marking, packaging, transportation, storage
Normal inspection Sampling plan
Inspection level S-3
Class B nonconforming products
Sample size
Class C nonconforming products
AQL-10
Nonconforming classification
Nonconforming
Longitudinal tearing strength
Longitudinal elongation
Tensile energy absorption
7.1 The packaging and marking of stretchable paper bags shall be carried out in accordance with the provisions of GB/T10342 or the provisions of the order contract. 7.2 The paper should be properly stored to prevent the influence of rain, snow and ground moisture. 7.3 During transportation, clean and covered transport vehicles should be used to prevent the paper from getting wet by rain, snow, water, etc. 7.4 During transportation and stacking, it is not allowed to drop from a high place to prevent damage to the paper. 7.5 The relevant parties shall be responsible for changes in product quality due to transportation and storage that do not comply with the provisions of this standard. c
Unqualified
Water absorption
Air permeability
Delivery moisture
Appearance Paper disease
A1 Principle
QB/T1460—1992
Appendix A
Tensile Energy Absorption (TEA) Test Method
(Supplement)
Paper produces stress-strain effect when subjected to external force, and its strain effect is a functional relationship with the force, that is, F=f(X). Under the action of f(X) force, a strain of △X is generated, and the work done by its stress-strain is f(X)·△X. When the external force gradually increases and exceeds the strain limit, the paper breaks, and the sum of the work done by stress-strain is the tensile energy absorption value of the sample. A2 Method
A2.1 As an arbitration test, the determination should be carried out in accordance with the provisions of GB/T12914. A2.2 When the manufacturer lacks instruments, the pendulum-type paper tensile strength tester can be used to measure the tensile force and elongation for conversion. The test steps are carried out in accordance with the provisions of GB/T453.
A3 Calculation
A3.1 The results can be read directly from the digital display screen when the constant rate of elongation tensile strength tester is used for determination. A3.2 The pendulum type paper tensile strength tester is used for determination. The conversion formula is as follows: IB~K·FL
TE A(J/m2)=
Where: E
The area equivalent work between the tensile elongation curve and the elongation axis; Conversion coefficient, longitudinal: 0.64, transverse: 0.74; tensile strength, N/m;
elongation;
effective length of paper strip, m;
width of paper strip, m.
Calculate the result to three significant figures. Appendix B
Inspection method for internal paper defects of rollwwW.bzxz.Net
(Supplement)
B1 Internal paper defects of roll
refers to the appearance paper defects that affect the performance, such as holes, severe see-through, dead folds, pulp lumps with a diameter of more than 10mm, etc. B2 Inspection method
Remove the outer 5 layers of the roll, cut off 5 layers, cut into 200mm×250mm paper pieces, weigh the paper pieces together, and then select and weigh the weight of the paper pieces with paper defects.
B3 Calculation
Calculate the percentage of the weight of paper sheets with paper defects to the weight of all paper sheets, and the calculation result shall be accurate to one decimal place. 280
Additional Notes:
QB/T1460-1992
This standard was proposed by the Paper Industry Department of the Ministry of Light Industry. This standard is under the jurisdiction of the National Paper Standardization Center. This standard was drafted by Qingzhou Paper Mill. The main drafter of this standard was Liu Shuqiu.
This standard was drafted with reference to the product quality standards of CLUPAK Company of the United States. 281
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