Some standard content:
National Standard of the People's Republic of China
Packaging container 3--10 t flexible container
Packaging container 3--10 t flexible freight container Subject content and scope of application
GB/T 14461-93
This standard specifies the classification, technical requirements, test methods and inspection rules of 3--10 t flexible container bags. This standard applies to 3--10 t flexible container bags made of polyolefin materials for container transportation of various small packaged goods. Flexible containers made of other materials can also be used for reference. 2 Reference standardsbzxz.net
GB 2918
Standard environment for conditioning and testing of plastic specimens GI310454 Flexible bulk bags
3 Terminology
3.1 Full-type flexible bulk bags
The entire bag can be flattened into a cross shape, 3.2 Half-type flexible bulk bags
The bag has sides that can be opened:
3.3 Fine-type flexible bulk bags
The sides are closed, and the top of the bag can be knocked open: 4 Product structure and specifications 4.1 Structure Names of various parts, see Figure 1, Figure 2 and Figure 3 Approved by the State Administration of Technical Supervision on June 17, 1993 and implemented on December 1, 1993 GR/T1446193 Spreading belt Longitudinal rib belt Two corners of the support Straightening belt Straightening belt Optimum length and width of the belt, see Table 1. 4.3 The height gauge is determined according to the needs of use.
Rated load level
GB/T14461—93
One lifting
Periodic triangle
Silver Xiang Yuebu
One sugar surface
Runjinxi
The rated load of flexible container bags can be designed according to the series of 3000kg.5000kg.8000kg.10000kg, etc. 5 Technical requirements
5.1 Structural requirements
Flexible container bags are ribbed network structures. The ribbed belts should be evenly distributed. The spacing (center line) is shown in Table 2. 2
Load, kB
Longitudinal, mm
Transverse, mm
.5 000
: 300
5 000~-10 000
5.2 Limit deviation of size of benzene bulk bag
GB/T 14461
The limit deviation of size less than 1000tm is +20mm, and the limit deviation of size greater than or equal to mm is +30mm. 5.3 Material requirements
5.3.1 The physical performance indicators of the base fabric of the flexible bulk bag shall comply with the provisions of Table 3. 3
Physical performance indicators
Tensile strength
N/50mm
Cold resistance
5.3.2 The base fabric must be cut without loose threads.
5. 3. 3 The tensile strength and elongation of the longitudinal reinforcement and suspension rope must comply with the requirements of Table 4. The tensile strength, N/root (kg/root) elongation, % in the table. The maximum load of a person; the number of reinforcements, the number of suspension poles is n/2, and the safety factor is -. Bag body base fabric No abnormality No abnormality When the load is 30% of the tensile strength (F) index value, the elongation is less than 25%. 5.3.4 The tensile strength of the transverse reinforcement is not less than 40% of the longitudinal strength. 5.3.5 The diameter of the buckle rope is 6~8 mm, and the tensile strength is not less than 300 N/root. 5.3.6 The specifications of the buckle rope ring are 5.3.5, and the ring aperture is 70+5 mm. 5.4 Technical requirements for sewing
5.4.1 The tensile strength of the main connecting part must reach more than 67% of the base fabric strength. 5.4.2 The tensile strength of the bottom connecting part must reach more than 42% of the base fabric strength. 5.4.3 Sewing requirements are straight, no loose needles or broken threads, no floating thread, and no less than 4 needles at the start and drop. The length of the rope should be equal, and the overlap should be even and straight.
5.5 Splicing requirements
5.5-1 The joints of the rope, ring, and buckle must be spliced. 5.5.2 There shall be no loose threads after splicing, and the tensile strength after splicing shall not be less than the strength of the material itself. 5.6 The flexible container bag shall be straight as a whole, without obvious lack of warp or weft, no obvious spots, and no obvious stains on the surface. 5.7 When the whole bag is loaded with twice the load, it shall be lifted up 30 times continuously. There shall be no tears or loose packages at the tendons, ropes, buckles, buckles, and bottom seams. 6 Test method
6.1 Determination of size
In the reference and unstretched state, measure the top and bottom of the adjacent sides of the flexible container bag twice to find the average value of the length of the common side. The height of the flexible container bag is to measure the height of different parts from the top to the bottom of the bag body, and find the average value. 6.2 Test method of base fabric
6.2.1 Sampling method
GH/T 1446193
Take the sample from the base material or body of the flexible container bag. If there is a dispute, the latter method shall prevail. 6.2.2 Tensile strength and elongation test
The test is carried out after being placed for 1 hour at a temperature of 2312 and a temperature of (50 ± 5). Take five test pieces with a width of 60mm and a length of 220mm from the longitudinal and transverse directions of the sample, and then accurately measure the width of 50mm. If the last wire is encountered, more than half of it will be left, otherwise it should be removed. Draw a 100mm mark in the center, and install it on the fire of the tensile strength testing machine at a position of about 25 Ⅱm outside the bad line. Stretch at a speed of about 200mn/min until the test piece breaks, and measure the maximum load and the distance between the marks at this time. The elongation can be calculated according to formula (1) and expressed as the arithmetic average of five pieces in the longitudinal and transverse directions. L-100
Elongation ()
Wu Zhong: - represents the maximum load and the distance between the marks. 6.2.3 Cold resistance test
(1)
Take two specimens with a width of 20 mm and a length of 1501 mm from the longitudinal and transverse directions of the sample, respectively, and place them in a 35°C temperature oven. After 2 h, fold the specimen in half 18 inches along the lengthwise direction to see if there are any cracks or damages on the base fabric material. They are considered to be positive tapes. 6.2.4 Heat resistance test
Take two specimens with a width of 2 mm and a length of 220 mm from the longitudinal and transverse directions of the sample, respectively, and roll up their surfaces. Apply a load of 9.8 N on them and place them in a drying oven at 80°C for 1 h. Take out and immediately separate the specimens. If there are any sticky or cracked surfaces, they are considered to be positive tapes. 6.3 Test piece method for longitudinal reinforcement, belts and ropes 6.3.1 General test conditions
The test must be carried out at a temperature of 23±2°C and a relative humidity of (50=5). The specimens must be placed in the above environment for 1 hour before the test and there must be at least two specimens. 6.3.2 Tensile strength test
Place the sample on a tensile strength tester with a width of 220 mm. Pull at a speed of about 100 mm/min to measure the tensile strength of the sample when it breaks.
6.3.3 Elongation test
Place the sample on a tensile strength tester, apply a 200V tension load, make the width of the sample 220 mm, and draw lines with a spacing of 200 mm. Pull at a speed of about 100 mm/min. When the load reaches 30% of the tensile strength (F), measure the spacing of the lines. The elongation can be calculated using formula (2):
1. - 200 × 100
Elongation (%)
Where: L represents the distance between the lines when the load reaches 30% of the tensile strength (F). 6.4 Connection force test method
6.4. 1 General conditions of the test
-(2)
The test must be carried out at a temperature of 23-2 (and a relative humidity of <50-5). The specimen must be placed under the above conditions for 1 hour before the test.
6.4.2 Test of the holding strength of the joint
Take five specimens with a seam width of 60mm, a straight seam length of 3mm, and a width of 25mm from the sewn specimen (when cutting the ears and the central part of the test piece, be careful not to cut the suture or cause scratches), and then accurately cut to 0mm width. If the longest thread exceeds half, keep it, and remove it if it is visible (the test piece is shown in Figure 4). Then put the test piece on the clamp with a distance of 200mm between them. The pulling speed is 2mru/min. Measure the breaking strength, accurate to .8N ((1kgf). And take the average value of the test. 6.5 Whole bag test method
CB/T 14461-93
One stretch for a period
Fill the contents (small transport packages) into sample 1 and sample 2 according to the bulk bag stacking method, and fill them to the rated load of the bag. Then add sample 2 neatly on top of sample 1. Steadily lift sample 1 to a height of 2m, and then steadily slide sample 1 to the ground at the normal mechanical operating speed. After repeating this test 30 times, observe various parts of sample 1: tendons, ropes, bindings, bag bottom seams, tea cloth, etc. If there are any abnormalities such as tearing and bagging, the sample is judged to have passed this test. 7 Testing rules
7.1 Factory inspection
7.1.1 If any of the items listed in 5.3 of the technical requirements of this standard is unqualified, the batch of bulk bags is judged to be unqualified. 7.1.2 The various items specified in 5.1+5.2, 5.4.3 and 5.6 of this standard shall be inspected according to the batch and corresponding number of samples specified in Table 5. If any of them is unqualified, the batch of container bags shall be judged as unqualified. Table 5
Less than 20G
Greater than 200
7.2 Type inspection
Sampling number
Qualified judgment number
Unqualified judgment number
When the following conditions occur, type inspection shall be carried out in general. a.
Trial type determination and appraisal of new products or old products for production: according to the number of
After formal production, if there are major changes in structure, materials, and processes that may affect product performance; during normal production, regular or after accumulating a certain amount of output, an inspection should be carried out periodically. When a product is discontinued for a long time and production is resumed: when the inspection results are significantly different from the last type inspection, the national quality supervision agency proposes a type inspection request. The second inspection number of
Number of unqualified judgments
Number of qualified judgments
Type inspection items shall be based on the fifth item of this standard. The test method of this chapter shall be implemented, and the number of samples shall be able to meet the test requirements of the required test items. 8. Marking, packaging, transportation and storage
8.1 Product marking
The following markings shall be printed on the main side of each finished flexible container bag: a.
Product name;
Rated load of the container bag;
User unit mark:
Manufacturer name of the container bag:
Exit date and expiration date of the bag.
GB/T 14461—93
8.2 The bottom of each container bag shall be printed with a bagging stacking force diagram. 8.3 The printed pattern on the bag body shall be clear and the position shall be accurate. 8.4 The transportation and packaging of the container bag shall be determined by the supply and demand parties. 8.5 The container bag shall be stored in a warehouse with good ventilation. Additional remarks:
This standard is proposed by China National Packaging Corporation. This standard was drafted by the Transportation Bureau of the Ministry of Railways, the Standards Institute of the Ministry of Railways, and Changzhou Railway Packaging Materials. The main drafters of this standard are Zhang Jin, Zou Lin, Xu Qihai, Yang Naiyuan, and Gao Conghan.
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