GB/T 26993-2011 Milk powder quantitative filling and packaging machine GB/T26993-2011 Standard download decompression password: www.bzxz.net
This standard specifies the terms and definitions, models, types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of milk powder quantitative filling and packaging machines. This standard is applicable to milk powder quantitative filling and packaging machines with flexible packaging materials or prefabricated cans with a packaging mass not exceeding 10kg. This standard
was drafted in accordance with the rules given in GB/T1.1-2009.
This standard was proposed and managed by the National Technical Committee for Standardization of Food Packaging Machinery (SAC/TC494). The
responsible drafting units of this standard: Jiangsu Only One Packaging Technology Co., Ltd. and Hefei General Electromechanical Products Testing Institute.
Participating drafting organizations of this standard: Dumex Infant Food Co., Ltd., Zhejiang Beingmate Science & Technology Industry & Trade Co., Ltd., Bright Dairy Co., Ltd., Inner Mongolia Mengniu Ala Dairy Co., Ltd., Mead Johnson Nutrition (China) Co., Ltd., Amway (China) Research & Development Center Co., Ltd., Guangdong Yashili Group Co., Ltd., Beijing Sanyuan Food Co., Ltd.
Main drafters of this standard: Yin Xianggen, Yang Yongzhong, Ma Wen, Chen Runjie, Wang Yanrong.
Participating drafters of this standard: Zhang Zhengyan, Chu Xiaojun, Liu Xianghong, Wang Chengbao, Xiangfangfeng, Li Jia, Tong Chengfu, Zhang Guoyu.
The following documents are indispensable for the application of this document. For any dated referenced document, only the dated version applies to this document. For any undated referenced document, the latest version (including all amendments) applies to this document.
GB/T191 Pictorial signs for packaging, storage and transportation
GB2894 Safety signs and guidelines for their use
GB4806.1 Hygienic standard for rubber products for food
GB5226.1—2008 Electrical safety of machinery-Electrical equipment of machinery-Part 1: General technical conditions
GB5413.30 National food safety standard-Determination of impurities in milk and dairy products
GB/T7311 Classification and model compilation method for packaging machinery
GB9687 Hygienic standard for polyethylene molded products for
food packaging GB9688 Hygienic standard for polypropylene molded products for food packaging
GB9689 Hygienic standard for polystyrene molded products for food packaging
GB9690 Hygienic standard for melamine-formaldehyde molded products for food containers and packaging materials
GB9691 Hygienic standard for polyethylene resin for food packaging
GB9692 Hygienic standard for polystyrene resin for food packaging
GB/T9969 General principles for instructions for use of industrial products
GB11333 Hygienic standard for aluminum tableware containers
GB12073 Safety and sanitation of dairy equipment
GB/T13306 Labels
GB/T13384 General technical conditions for packaging of electromechanical products
GB/T14251—1993 Technical conditions for round canned containers made of tinned thin steel sheets
GB/T15171 Test method for sealing performance of flexible packaging
GB/T16273.1 Graphical symbols for equipment Part 1: General symbols
GB16798 Safety and sanitation of food machinery
GB19891 Mechanical safety Hygienic requirements for mechanical design
GB/T21302 General rules for composite films and bags for packaging
JB/T7232 Simple method for determining the sound power level of noise from packaging machinery
JB7233 Safety requirements for packaging machinery
QB/T2467 Stainless steel pipes for food industry
JJF1070 Metrological inspection rules for net content of quantitatively packaged goods
Preface I
1 Scope1
2 Normative references1
3 Terms and definitions2
4 Model, type and basic parameters3
5 Technical requirements4
6 Test methods8
7 Inspection rules13
8 Marking, packaging, transportation and storage14

ICS55.200
National Standard of the People's Republic of China
GB/T 26993—2011
Filling and packaging machine for milk powder2011-09-29Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of ChinaStandards Administration of Standardization of the People's Republic of China
2011-12-01Implementation
GB/T 26993—2011
Current normative referenced documents
Terms and definitions
Model, type and basic parameters
Technical requirements
Test methods
Inspection rules
Marking. Packaging, transportation and storage.
This standard was drafted in accordance with the rules given in GB/T1.12009. This standard is proposed and approved by the National Technical Committee for Standardization of Food Packaging Machinery (SAC/TC494). The responsible drafting units of this standard are: Jiangsu Yiyi Packaging Technology Co., Ltd., Hefei General Electromechanical Products Testing Institute GB/T26993-2011
The participating drafting units of this standard are: Xiangguanzi Infant Food Co., Ltd., Zhejiang Yinmei Technology Industry and Trade Co., Ltd., Bright Dairy Co., Ltd., Inner Mongolia Mengniu Ala Dairy Co., Ltd., Mead Johnson Nutrition (China) Co., Ltd., Amway (China) Research and Development Center Co., Ltd. Guangdong Yashili Group Co., Ltd., Beijing Sanyuan Food Co., Ltd. The main drafters of this standard are: Gu Yanggen, Yang Yongzhong, Ma Wen, Chen Runjie, Wang Yanrong. The participating drafters of this standard are: Zhang Zhengyan, Chu Xiaojun, Liu Xianghong, Wang Chengbao, Xiangfangfeng, Li Jia, Tong Chengfu, Zhang Guogang. 1 Scope
Milk powder quantitative filling and packaging machine
GB/T 26993—2011
This standard specifies the terms and definitions, models, types and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of milk powder quantitative filling and packaging machines. This standard is applicable to milk powder quantitative filling and packaging machines (hereinafter referred to as "packaging machines") that use flexible packaging materials and prefabricated cans with a packaging mass of no more than 10kg.
2 Normative references
The following documents are indispensable for the application of this document. For all referenced documents with a date, only the version with the date is applicable to this document. For all undated referenced documents, the latest version (including all amendments) is applicable to this document. GB/T191 Pictorial signs for packaging, storage and transportation
GB2894 Safety signs and guidelines for their usewwW.bzxz.Net
B4806.1 Hygienic standards for rubber products for food GB5226.1-2008 Mechanical and electrical safety Mechanical and electrical equipment Part 1: General technical requirements GB5413,30 National food safety standard Determination of impurities in milk and dairy products GB/T7311: Classification and model compilation method for packaging machinery GB9687
GR9688|| tt||GE9689
Health standard for polyethylene molded products for food packaging Health standard for ethylene molded products for food packaging Health standard for styrene molded products for food packaging GB96901
Health standard for melamine-formaldehyde molded products for food containers and packaging materials GB9691
GB9692
Health standard for polyethylene resin for food packaging Health standard for styrene resin for food packaging GB/T9969 Product instruction manual General GB11333 Aluminum food containers and health standards
Dairy equipment safety and sanitation
GR12073
GB/T13306 Signs
GB/T13384
General technical requirements for packaging of electromechanical products
GB/T14251—1993 Technical requirements for round canned containers made of sawn sheet metal GB/Tt5171 Test method for sealing performance of flexible packaging GB/T16273.1 Graphic symbols for equipment Part 1: General symbols CB16798 Food machinery safety and sanitation
GB19891 Machinery safety Hygienic requirements for machinery design GB/T21302 General rules for composite films and bags for packaging JB/T7232 Simple method for determination of sound power level of packaging machinery noise IB7233 Safety requirements for packaging machinery
QB/T246 Stainless steel pipes for food industry
JJF1070 Rules for metrological inspection of net content of quantitatively packaged goods 1
GB/T 26993-—2011
3 Terms and definitions
The following terms and definitions apply to this document. 3.1
production capacity
Production capacity
The number of packages that can be packaged per unit time, in bags (pith)/min. 3.2
Package package
The total amount of milk powder formed after packaging.
Net content netquantity
The mass of the milk powder inside after removing the packaging container and other packaging materials. Note: Regardless of the packaging materials of the powder, or any other materials packaged with the milk powder, they shall not be recorded as net content. For example, the quantitative compound in the milk powder package shall not be counted as reduced content.
Nominal net content nominalquantity
The net content of the product clearly stated by the producer or seller on the package of quantitatively packaged products. 3.5
Actual content actualquantity
The amount of the contents of the package determined by metrological inspection in accordance with JF 1070. 3.6
Average actual content averageactualquantityThe arithmetic mean of the actual contents of the sample units. 3.7
Met quantity deviation
The difference between the actual content and the marked net content.
Residual oxygen level
The volume of oxygen contained in the package as a percentage of the total gas volume. 3.9
Spilth of powder
The actual mass of milk powder that escapes from the packaging container with the airflow during the vacuum filling process, in grams. 3. 10
Milk powder direct contact surfaces
Surfaces in the equipment that are in direct contact with milk powder. 3. 11
Milk powder contact surfaces
Milk powder direct contact surfaces; surfaces in the equipment that are in contact with the surface of the packaging material; surfaces that are in direct contact with the surface of the packaging material through this surface: surfaces through which contaminants may flow, drip, or be carried into the milk powder. 3.12
Splash contact surfaces are surfaces that are not in contact with milk powder, but in normal use, may come into contact with flying milk powder, spilled milk powder or surfaces in contact with unused milk powder in dust removal device 2
. 3.13
Non milk powder contact surfaces are all surfaces that are not in contact with milk powder or not splashed by milk powder. 3.14
Milk powder area milkpowder2one
The space between all milk powder contact surfaces and milk powder. 3.15
Accessible
Easy to open the equipment for inspection and cleaning with simple tools. 3.16
Readily aceeasihle
Easy to open the equipment for inspection and cleaning without external tools. 3.17
Easy to cleanrcadilycleanable
Contaminants can be easily removed by conventional cleaning methods. 4 Model, type and basic parameters
4.1 Model
The model of the packaging machine is compiled according to the provisions of GB/T7311. The model of the bag packaging machine is compiled and expressed as follows: DXDN-C
GB/T 26993—2011
Improved design sequence code: Indicated by the English letters A, B, and C in sequence. The first design product has no sequence code. Derived sequence code: Indicated by Roman mathematics I, Ⅱ, Ⅱ·. Main parameters: Maximum bag size, unit is t. Structural type code: Vertical is indicated by \I.", and horizontal is indicated by "W". Bag milk powder quantitative filling packaging machine
DXDV-L.250 indicates a vertical powder quantitative filling and packaging machine with a maximum filling width of 250mTI, the first design. Can packaging machine model compilation method: DXTN-
Improved design sequence code: Indicated by the English letters A, BC. in sequence. The first product to be designed has no sequence code. Derived sequence code: Indicated by Roman numerals I, II,,. 1 Main parameter: The maximum circumscribed circle diameter of the can body, the unit is I11. Structural type code: The special shape is indicated by "", and the round shape is not indicated. Can milk powder quantitative filling and packaging machine
DXTV-Y160 indicates a special-shaped plug-in milk powder fixed tray filling and packaging with a maximum circumscribed circle diameter of 160ms, the first design. 3
GB/T26993—2011
4. 2 Types and basic parameters
4.2.1 Packaging machines are divided into: bag packaging machines and packaging machines according to packaging containers. 4.2.1.1 Bags are divided into: horizontal and vertical according to structure. 4.2.1.2 Packaging machines are divided into: ordinary bags and special-shaped bags according to the type of packaging bags. 4.2.1.3 Cans are divided into: round cans and special-shaped cans according to can types. 4. 2. 1. 4
Cans are divided into: metal cans and composite cans according to the material of the can body. Basic parameters of packaging machines:
Packing capacity: 81
Maximum bag width/maximum circumscribed circle diameter of the can body: tnm; b)
Power: kw;
Working voltage, frequency: V.Hz:
Production capacity: bag ()/min.
5 Technical requirements
5. 1 General requirements
The packaging machine shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. 5. 1.1
5.1.2 The operation of the packaging machine shall be stable, and the movement of the moving parts shall be sensitive, coordinated and accurate, without obstruction and abnormal sound. 5.1.3 For packaging machines with gas circuits, the connection of the gas circuits shall be sealed, without oil seepage and air leakage. 5.1.4 The packaging machine shall be equipped with a dust removal interface or dust removal device: the gas flow rate shall be adjustable according to requirements to reduce the loss of powder. 5. 1. 5 When the packaging machine is operating normally, no foreign matter and impurities generated during the packaging process shall enter the milk powder. 5. 2 Performance requirements
5.2.1 The production capacity of the packaging machine shall reach the rated production capacity. 5. 2. 2 The net content deviation of the milk powder shall comply with the provisions of Table 1, and the average content shall comply with the provisions of JJF 1070. Table 1 Net content deviation
Marked net content (Q,)
50--100
100~200
200--300
300--500
500-1000
1 000~10 000
5.2.3 The residual oxygen content of the package should not exceed 3%. 5.2.4 The powder leakage of the package should comply with the provisions of Table 2. 4
%(% of Q)
With deviation
Net with (9,)
50--500
500--1 000
1 000~2 000
2 000--2 400
2 400--3 200
3 200~4 000
4 000-~5 000
5000~10000
Table 2 Powder leakage
%(% of Q)
5.2.5 The appearance quality of the sealing of the packaging bag/can shall comply with the following requirements: Powder leakage
GB/T 26993--2011
a) The seal of the packaging bag should be smooth, with clear indentations or embossings, without wrinkles, burning and pressure penetration; the production date, production batch number, anti-cargo label, etc. of the packaging bag should be clear and firm; the printing position should be consistent; the packaging should have an easy-to-open function, and the appearance quality pass rate should not be less than 99.8%.
b) The appearance quality of the seal of the packaging can should meet the following requirements: the surface of the packaging can should be smooth, the outer shell surface and the edge seam should not be damaged by the packaging process, the seal should be complete, and there should be no bulging, protruding corners, corners and wear, deformation, concave cancer caused by mechanical damage; the upper cover and lower bottom of the packaging can should be straight or slightly concave, the production date, production batch number, anti-cargo label, etc. of the packaging can should be clear and firm; the printing position should be consistent; the appearance quality pass rate of the packaging can should not be less than 99.9%. 5.2.6 The heat seal strength of the packaging joint should not be less than the values ​​listed in Table 3. The material thickness described in this table refers to the thickness of the heat-sealing layer material. The heat-sealing parts are made of materials that are easy to heat-seal, such as PE, PP, etc. Table 3 Heat-sealing strength
Material thickness (expressed by \R\)
0.02R.0.08
0.08R-0.18
0.18≤R<0.36
Heat-sealing strength
N/15mm
5.2.7 For bag packaging machines controlled by color code positioning, the error of the cutting position should not exceed ±2 mm. When other forms of control are used, when the bag length is less than 100 mm, the error should not exceed ±2 mm; when the bag length is greater than or equal to 100 mm, the error should not exceed ±2% of the bag length.
5.2.8 After the sealing and drop tests, the sealing part of the packaging bag should be intact, and the sealing qualification rate should not be less than 99.9%. 5.2.9 The three items of the connection rate, tightness and integrity rate of the seam cover hook of the sealing structure of the packaging can (the seam must be inspected) should all reach more than 50%, and the selected connection length should not be less than 1mm.
5.2.10 After the sealing test, the seal should be intact, without deformation or leakage, and the sealing qualification rate should be not less than 99.9%. 5
GB/T 26993—2011
5.2.11 The temperature regulator of the bag packaging machine should be stable and reliable, and the heat sealing temperature should be acceptable. The temperature difference on the effective heat sealing length of the heat sealing part surface should be within 15℃.
5.2.12 The noise sound pressure level of the packaging machine should not exceed 80dB(A). 5.3 Electrical safety requirements
5.3.1 The circuit control systems of the packaging machine shall comply with the requirements of GB5226.1.-2008, be safe and reliable, operate accurately, and each electrical connector shall be firmly connected and numbered; the operating buttons shall be flexible and have an emergency stop button; the indicator light display shall be normal; there shall be an emergency stop device, and the effective operation of the emergency stop actuator shall terminate the subsequent command, and the operation command shall be valid until it is reset. Reset can only be manually operated at the position that triggers the emergency operation command. The reset of the command shall not restart the machine, but only allow restarting. 5.3.2 The insulation resistance measured when 500Vd,c. is applied between the power circuit conductor and the protective grounding circuit shall not be less than 1Ma. 5.3.3 All exposed conductive parts of the packaging machine shall be connected to the protective bonding circuit according to the requirements of 8.2.1 of GB5226.1-2008. The connection between the grounding terminal or the melting point and the grounded metal part shall have a low resistance value, and its resistance value shall not exceed 0.12. The grounding limit test shall be passed to determine whether it is qualified.
5.3.4 All circuit conductors of electrical equipment and the protective grounding circuit shall be subjected to a withstand voltage test for at least 1s. 5.3.5 The electrical equipment shall be corrosion-resistant and its protection level shall reach IP55. 5.4 Safety and sanitation requirements
5.4.1 The safety and sanitation of the packaging machine shall comply with the provisions of relevant standards such as GB16798, GB12073 and GB19891. 5.4.2 The materials and hygiene properties of the surfaces in contact with milk powder shall comply with the following provisions: a) Stainless steel profiles are easy to be drawn and bent, have good welding performance, are non-toxic, non-absorbent, have strong corrosion resistance, can be treated with light, have a bright and beautiful appearance and are easy to clean. Stainless steel pipes shall comply with the provisions of QB/T2467. bh)
Aluminum alloys shall not be used on the surfaces in direct contact with milk powder such as hoppers, guide pipes, and runners: bronze or precious metals do not meet the requirements of product contact surfaces and are easily affected by cleaning solvents. They shall not be used on surfaces in direct contact with milk powder.
d) Plastics should be non-toxic, should not affect the quality of milk powder, should be wear-resistant, should be able to maintain its inherent form, shape, color, transparency, toughness, elasticity, size and other characteristics under working conditions such as cleaning and disinfection, and should comply with the relevant hygiene requirements of GB 9687~9692. c) Rubber should be heat-resistant, acid-resistant, alkali-resistant and oil-resistant, strong and stable, can withstand normal disinfection and sterilization, be non-toxic and non-absorbent, should not affect the quality of milk powder, and should comply with GB1806.1. Hygiene requirements. f
Cotton fiber, wood fiber, bamboo fiber, linen, steel and artificial fiber can be used as filter materials, screen materials, elastic connecting materials. These materials should be moss-free, free of falling objects, insoluble in water, not reacting with milk powder, and not affecting the quality of milk powder. Packaging machines shall not use glass fiber materials.
) The welding material composition has similar performance requirements to the welded material, and a tight and solid organization should be formed in the welding area, and it should be non-toxic and corrosion-resistant.
h) The filter medium can be cotton fiber, wood fiber, bamboo fiber, metal wire, activated carbon, activated alumina, etc., which can be one or more of them. Under the conditions of use, the filter medium should be non-toxic, free of falling objects, should not carry toxic volatiles or other substances that may pollute the air and products, and should not have volatile odors that may affect milk powder. Under the conditions of use, the bonded objects should have sufficient strength and tightness, and should be non-toxic, non-volatile and non-solvent.
5.4.3 The materials and sanitation of the non-milk powder contact surface should meet the following requirements: a) The non-milk powder contact surface should be made of anti-corrosion materials, or coated with anti-corrosion materials, and the coating should be adhesive and solid. b) The non-milk powder contact surface should be durable and not absorbable by the human body. Parts with direct contact surfaces of milk powder and non-milk powder contact surfaces should not be painted.
5.4.4 The materials and sanitation of the milk powder splash contact surface should meet the following requirements: 6
CB/T 26993—2011
a) The milk powder splash contact surface should be made of corrosion-resistant materials, and it is also allowed to use materials with surface coatings that can resist corrosion. If the surface is coated, the coating should adhere firmly.
The contact surface of milk powder splash should have good anti-absorption and anti-penetration ability, and be durable and washable. 5. 4, 5The safety and sanitation of the packaging machine structure should meet the following requirements: The contact surface of milk powder should be smooth, flat, easy to clean or disinfect, corrosion-resistant, and not contain harmful substances or substances that exceed the amount specified in the food safety standard. a)
and harmful to human health should not be generated by interacting with milk powder, or substances that exceed the amount specified in the food hygiene standard and harmful to human health, and substances that affect the smell, color and quality of milk powder. b) The inner walls of the hopper, guide pipe, dust removal device, etc. that contact milk powder, and the milk powder conveying pipeline and connecting parts should be smooth, flat, and should not have depressions and dead corners where milk powder is retained. The welding chain should be polished and there should be no material retention seams. Any bearing that contacts the surface of milk powder must be non-lubricant type. If lubricant type bearings are in the milk powder area, there must be reliable sealing devices around the bearings to prevent milk powder from being contaminated. In order to make the equipment easy to clean, the roughness of the surface in contact with milk powder is required to be: if it is a stainless steel plate or stainless steel pipe, its roughness Ra value shall not be greater than 1.6 μm; if it is a plastic product or rubber product, its roughness Ra value shall not be greater than 0.8 μm; the roughness Ra value of the surface in contact with milk powder shall not be greater than 3.2 μm, and there shall be no defects or cracks. e) Unless the basic function is required, the width of the sealing ring and the key in contact with milk powder in the equipment shall not be less than the depth, and the groove width shall be greater than 6.5 mm; any inner angle less than or equal to 135\ on the milk powder contact surface shall be processed into a rounded corner. The parts of the equipment that contain the milk powder contact surface or the milk powder splash contact surface must be easy to clean. Parts with milk powder contact surfaces should be directly cleanable or easily disassembled and installed. Parts with milk powder contact surfaces should be directly cleanable or easily disassembled and installed. Parts with milk powder contact surfaces should have good processing performance (bendability, cutting performance, weldability, grindability and polishability, etc.), good thermal conductivity, corrosion resistance, and liquid resistance. Reliable sealing devices should be installed at the connections of external parts extending into the milk powder area to prevent milk powder from being contaminated. Parts containing glass should not be used in the equipment. The milk powder packaging area should be isolated from the outside world and a protective cover should be added. No foreign objects should fall into the area or pests should grow in the area. The working air filter should be installed to ensure that dust above 5m cannot pass through. The equipment should be equipped with safety and sanitation equipment. The lubricant used in the unloading operation structure equipment must be food grade and must not enter the milk powder; coolants, detergents, disinfectants, etc. must not interact with milk powder or containers to cause a series of pollution; the equipment should be heat-resistant, chemical and mechanical resistant, easy to clean, disinfect and meet food hygiene requirements; the color of the equipment should not affect the evaluation of product quality or pollution, and the parts in the equipment that are not easy to disassemble should be easy to clean. There should be no sliding dead corners and no residues during cleaning. Any protective devices that hinder cleaning and observation required for production safety should be designed to be easy to disassemble. k)
The installation method of the equipment is to seal it to the ground or install it on the ground. When the latter installation method is adopted, there should be a gap of at least 150 mm between the bottom of the equipment and the ground to facilitate the cleaning of the bottom of the equipment. m) In order to facilitate the detection of foreign matter, the size of the parts in the milk powder area should not be too small. When the wire diameter of non-metal parts is less than 100 mm, avoid using materials that are not much different from the color of the milk powder. Parts that are too small are designed to ensure that they cannot fall off the body even if they are loose during operation or move during cleaning. 5.4.6 The raw materials and purchased supporting parts used in the packaging machine should have the quality certificate of the manufacturer. 5.4.7 The safety protection of the packaging machine should comply with the following provisions: a) The safety protection of the packaging machine should comply with the provisions of JB7233. b)
There should be clear and eye-catching safety warning signs such as operation, lubrication, and anti-scalding on the packaging machine. The safety signs should comply with the provisions of GB 2894 and GB/T16273.1.
When opening the protective device of the packaging machine may cause danger, the packaging machine should be equipped with interlocking protection, which should be interlocked with the mechanical transmission mechanism of the packaging machine. When the packaging material or material is lower than the lower limit of the excavation or there is no material, an alarm should be sounded or an alarm should be sounded and the machine should be stopped. d) All parts and fasteners such as bolts and nuts on the packaging machine should be fixed reliably and should not be loose or fall off due to vibration. 7
GB/T 26993--2011
e) Rubber parts and plastic parts (such as sealing gaskets and gauge frames that need to be fixed) bonded on the surface in contact with milk powder should be bonded continuously to ensure that they will not fall off under the working conditions of the stop belt (cleaning, heating, and pressurization). Protective covers should be installed when the gears, belts, chains, friction wheels and other moving parts of the packaging machine are exposed. The reciprocating motion of the machine has a protective device at the extreme position.
5.5 Appearance quality requirements
5.5.1 The paint and plastic spraying layer of the non-processed surface of the packaging machine should be flat and smooth, with uniform color, and should not have obvious scratches, dirt, flow marks, bubbles, repair marks and other defects.
5.5.2 The surface-treated parts of the packaging machine should have uniform color and no defects such as bubbles, delamination, and rust. 6 Test method
6.1 Test conditions
6.1.1 The test environment temperature is 15℃～~25℃, and the relative humidity is 40%~55%. 6.1.2 The milk powder and packaging materials used in the test shall comply with the national and industry standards. The packaging container and lid made of metal shall comply with the provisions of GB11333 and GB/T142511993, and the packaging film shall comply with the provisions of GB/T21302. 6.1.3 The residual oxygen content of the protective gas shall be less than 0.1%. 6.2 General requirements inspection
6.2.1 Idle operation test
After each packaging machine is assembled, an empty operation test shall be carried out. The continuous empty operation time shall be no less than 1h, and the low speed and high speed shall be no less than 0.5h respectively. Check the machine performance, which shall comply with the provisions of 5.1.2 and 5.3.1. 6.2.2 Inspection of air circuit sealing
The following methods can be used to inspect the air circuit sealing of the packaging machine: a) Use a cotton swab to gently wipe the sealing parts of the pneumatic components and observe whether there is oil residue on the absorbent cotton. This should comply with the provisions of 5.1.3; b) Use sterile water to apply to the sealing parts of the pneumatic components and observe whether there is air leakage. This should comply with the provisions of 5.1.3. 6.2.3 Detection of metallic foreign matter and impurities
Take the milk powder before and after packaging and detect the metallic foreign matter and impurities in the milk powder according to the provisions of GB5413.30. The results shall comply with the provisions of 5.1.5.
6.3 Performance test
6.3.1 Production capacity test
After the packaging machine is running, the continuous packaging time should not be less than 5 minutes. Count the number of packages and calculate the production capacity according to formula (1). This should comply with the provisions of 5.2.1.
Where:
V—production capacity, in bags (cans) per minute [bags (cans)/min_, M-number of completed packages, in bags (cans): T packaging time (not less than 5 minutes).
6. 3.2 Net content deviation test
GB/T 269932011
The maximum permissible error of the test sample is less than or equal to one third of the permissible deviation of the net content of the tested package. The net content is measured according to the provisions of Table 4. The difference between the actual net content of milk powder and the marked net content shall comply with the provisions of 5.2.2. Table 4 Sampling plan for metrological inspection
Number of samples
Batch of package N
100~500
501~~3200
More than 3200
Average actual content positive value (A·S)
Correction factor
Note 1: The confidence level of this batch sample plan is 59.5%. Standard deviation of actual content
Allowed single item to exceed net content deviation
1 times less than or equal to 2 times
Allowed single item to exceed net content
Deviation 2 times
Note 2: When the number of batches of an inspection batch is less than or equal to 10 pieces, only the actual content of each single packaged commodity shall be inspected and evaluated, and the average actual content shall not be calculated.
Calculate the average actual content according to formula (2)
Where:
Average actual content of sampled packages;
Q:——actual net content of milk powder;
nNumber of sampled packages.
The average actual content should comply with the requirements of formula (3): 9(Q.-AS)
Where ·
Q——Marked net content;
Correction factor 1=5.99×
S—Actual content standard deviation S
Note: The average actual content should be greater than or equal to the marked net content minus the average actual content correction value 156. 3. 3 Residual oxygen test
+*-(3)
After the packaging batch is operating normally, samples are taken from the bags according to the sampling plan in Table 5. Within 5 minutes after the sample is offline, an oxygen content analyzer with an accuracy of 0.1 is used to measure the residual oxygen in the sample. The provisions of 5.2.3 shall be followed. 9
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