This standard specifies the product marking, requirements, test methods, inspection rules and marking, packaging, transportation and storage of microporous filter membranes. This standard applies to microporous filter membranes made of high molecular polymers as basic materials by casting. HY/T 053-2001 Microporous filter membrane HY/T053-2001 Standard download decompression password: www.bzxz.net
This standard specifies the product marking, requirements, test methods, inspection rules and marking, packaging, transportation and storage of microporous filter membranes. This standard applies to microporous filter membranes made of high molecular polymers as basic materials by casting.
This standard and HY/T0391995 "Determination Method of Pore Performance of Microporous Filter Membrane" are a group of interrelated standards.
Appendix A of this standard is the appendix of the standard
This standard is proposed by the Hangzhou Water Treatment Technology Research and Development Center of the State Oceanic Administration.
This standard is under the jurisdiction of the National Marine Standards and Metrology Center.
The main drafters of this standard are Gong Meiluo, Huang Jinzhong, Yuan Guoliang and Wan Chunxin.
This standard was drafted by the State Oceanic Administration Hangzhou Water Treatment Technology Research and Development Center and is responsible for interpreting
the provisions contained in the following standards, which constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards.
GB/T2828-1987 Counting sampling procedure and sampling table for batch inspection (applicable to inspection of continuous batches)
GB/T6378-1986 Quantitative sampling inspection procedure and chart for defective product rate (applicable to inspection of continuous batches)
GB9687-1988 Hygienic standard for polyethylene molded products for food packaging
GB9688-1988 Hygienic standard for polypropylene molded products for food packaging
HY/T039-1995 Method for determining the pore performance of microporous filter membranes

ICS07.060
Marine Industry Standard of the People's Republic of China
HY/T053—2001
Microfiltration membrane
Microfiltration membrane
2001-07-27 Issued
State Oceanic Administration
2002-01-01 Implementation
HY/T053-2001
This standard and HY/T0391995≤Microfiltration membrane pore performance determination method" are a set of interrelated standards. Appendix A of this standard is the appendix of the standard.
This standard was proposed by the Hangzhou Water Treatment Technology Research and Development Center of the State Oceanic Administration. This standard is under the jurisdiction of the National Marine Standards and Metrology Center. The main drafters of this standard are Gong Meiluo, Huang Jinzhong, Yuan Guoliang, Wan Chunxin. This standard was drafted and interpreted by the Hangzhou Water Treatment Technology Research and Development Center of the State Oceanic Administration. 1 Scope
Marine Industry Standard of the People's Republic of China
Microporous filtration membrane
Microfiltration membrane
HY/T 053—2001
This standard specifies the product marking, requirements, test methods, inspection rules and marking, packaging, transportation and storage of microporous filtration membrane. This standard applies to microporous filtration membranes made of high molecular polymer as the basic material by casting. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T2828-1987Batch-by-batch inspection counting sampling procedure and sampling table (applicable to the inspection of continuous batches) GB/T6378-1986 Quantitative sampling inspection procedure and chart for defective product rate (applicable to the inspection of continuous batches) GB9687-1988 Hygienic standard for polyethylene molded products for food packaging GB9688-1988 Hygienic standard for polypropylene molded products for food packaging HY/T 039-1995
3 Definitions
Method for determining the pore properties of microporous membranes
This standard adopts the following definitions
3.1 Membrane pore size
The nominal pore size (diameter) of the filter membrane.
3.2 Bubble point pressurebubble point pressureThe critical pressure at which the first bubble appears and then bubbles continuously emerge. 3.3 Flux
The amount of liquid passing through the filter membrane per unit area per unit time under a certain temperature and pressure (generally negative pressure). 4 Product marking
4.1 The product marking of microporous filter membrane consists of four parts: manufacturing material, whether it has a support, membrane pore size and membrane geometric dimensions. 4.1.1 The manufacturing materials of microporous filter membrane can be divided into: mixed cellulose membrane, indicated by "CN-CA"; nylon 6 membrane, indicated by "PN-6";
-polyvinylidene fluoride membrane, indicated by "PVDF"; polyethersulfone membrane, indicated by "PES".
4.1.2 Microporous filter membrane can be divided into: - enhanced type, with support, indicated by "S"; - non-enhanced type, without support, indicated by "US". 4.1.3 According to the different membrane pore sizes, it can be divided into:|| tt||Approved by the State Oceanic Administration on July 27, 2001
Implemented on January 1, 2002
HY/T053—2001
0.10μm, 0.22μm, 0.45μm, 0.65um, 1.0μm, 3.0μm, etc. 4.1.4 According to the different geometric dimensions of the membrane, it can be divided into: round membrane, expressed in "mm", such as *47mm, $60mm square membrane, expressed in mm×mm" (length×width), such as 30mm×30mm. 4.2 Product Marking
Geometric Dimensions
Membrane Pore Size
Whether Supported
Material
Example 1: PVDF-S-0.22-$47
Indicates: the manufacturing material is polyvinylidene fluoride, enhanced (with support), the membrane pore size is 0.22μm, and the geometric dimensions are a circular microporous filter membrane with a diameter of 47mm.
Example 2: CN-CA-US-0.45-30X30
Indicates: the manufacturing material is mixed cellulose, non-enhanced (without support), the membrane pore size is 0.45um, and the geometric dimensions are a square microporous filter membrane with a diameter of 30mm×30mm.
5 Requirements
5.1 Membrane thickness
5.1.1 The thickness of the enhanced microporous membrane is 0.10mm±0.04mm (dry state); 5.1.2 The thickness of the non-enhanced microporous membrane is 0.12mm±0.03mm (wet state). 5.2 Bubble point pressure and flux
The bubble point pressure and flux values ​​are shown in Table 1 and Table 2. Table 1 Bubble point pressure and flux values ​​of hydrophilic microporous membrane Filter type
Nominal pore size/μum
Flux value/
(mL/cm2.min）
Bubble point pressure value/
Non-enhanced microporous membrane
The bubble point pressure value is measured with pure water (or distilled water). 1.2
≥100
The flux value is measured with pure water (or distilled water) at 25°C. 0.10
Enhanced microporous membrane
Table 2 Bubble point pressure and flux value of hydrophobic microporous membrane Membrane type
Nominal pore size/um
Flux value/
(ml/cm2.min）
Bubble point pressure value/MPa
0.15±0.05
The bubble point pressure value is measured with isopropanol (or anhydrous ethanol). Enhanced polyvinylidene fluoride (PVDF) microporous membrane 0.45
0.06±0.02
0.03±0.01
The flux value is measured at 25 (hours, after the membrane is soaked with isopropanol (or anhydrous ethanol), and then with pure water (or distilled water). 2
0.02±0.01
5.3 AppearancebZxz.net
HY/T053—2001
The appearance of the membrane should be flat, clean, dry, uniform in color, and free of mechanical damage, holes and holes. 6 Test method
6.1 Measuring membrane thickness
6.1.1 Use a thickness gauge with an accuracy of 0.01mm or Micrometer. 6.1.2 Measure the thickness of four points on the membrane, and the distribution is: the center point, three points with equal distances. 6.1.3 Calculate the average of the four measured values. 6.2 Bubble point pressure determination
Perform according to the provisions of HY/T039.
6.3 Flux determination
6.3.1 Install the wet $47mm membrane on the filter. The hydrophobic filter membrane needs to be pre-soaked with anhydrous ethanol or isopropanol (CP grade or above).
6.3.2 Make the filter produce a negative pressure of 0.09MPa. 6.3.3 Measure the time t required for 50mL of pure water (or distilled water) to pass through. 6.3.4 According to the measured water temperature, from Appendix A ( The FTc value can be obtained by looking up the temperature correction factor table in the appendix of the standard. 6.3.5 Calculate according to formula (1).
Where: q—
Flux, mL/cm2·min;
tTime.s;
50×60
$47mm effective filtration area of ​​the membrane, cm; - temperature correction factor.
6.4 Appearance inspection
Use a medical X-ray observation lamp and inspect visually in a dark environment. 7 Inspection rules
Inspection is divided into factory inspection and type inspection. 7.1 Factory inspection
7.1.1 The filter membrane should be sampled by the quality inspection department before it is shipped. Inspection. 7.1.2 The items, requirements and methods of factory inspection are shown in Table 3. Table 3 Items, requirements and methods of factory inspection Inspection items
Membrane thickness
Bubble point pressure
7.1.3 Batch principle: The microporous filter membranes cast under the same process conditions with the same solution preparation constitute an inspection batch. 7.1.4 Sampling plan:
The sampling plan is shown in Table 4.
7.1.5 Judgment rule: If one or more of the four inspection items in 7.1.4 are unqualified, it will be judged as unqualified. 7.2 Type inspection
. (1)
HY/T053—2001
7.2.1 Type inspection should be carried out in any of the following cases: a) When trial-producing new products;
b) When there are major changes in the production process;
c) When production is stopped for more than two years and then resumed;
d) When the quality and technical supervision department puts forward type inspection requirements. Table 4 Sampling plan
Inspection items
Membrane thickness
Bubble point pressure
Sampling plan
Adopt the inspection method of the "*S" method in GB/T6378 to separate the double-sided specification limits, implement normal inspection, and take the inspection level. The acceptable quality level is 0.65%
Adopt the inspection method of the "\S" method in GB/T6378 to separate the double-sided specification limits, implement normal inspection, and take the inspection level of 1. The acceptable quality level is almost 0.65%
|Adopt the inspection method of the \S\ method of the single-side lower specification limit in GB/T6378, implement normal inspection, take the inspection level I, and the acceptable quality level is 0.65%
Adopt the normal inspection one-time sampling plan in GB/T2828, take the general inspection level II, and the qualified quality level AQL is 6.5
Note: When the number of samples drawn according to GB/T2828 for appearance inspection is less than the number of samples drawn according to GB/T6378, the number of samples drawn according to GB/T6378 shall prevail.
Type inspection items are all items specified in this standard. 7.2.3 Batch principle: The microporous filter membranes cast under the same process conditions with the same solution preparation constitute the inspection batch. 7.2.4 Sampling plan: The sampling plan is in accordance with the provisions of Table 4. 7.2.5 Judgment rule: If one or more of the four inspection items in 7.2.4 are unqualified, it is judged as unqualified. 8 Marking, packaging, transportation and storage
8.1 Marking
The packaging box should be labeled with the following information: a) Product name;
b) Implementation standard number;
c) Product trademark;
d) Product specifications and quantity;
e) Manufacturer and detailed address;
f) Batch number and production date.
8.2 The packaging material of the filter membrane should be polyethylene or polypropylene molded products for food packaging. Polyethylene molded products should comply with the provisions of GB9687, and polypropylene molded products should comply with the provisions of GB9688. 8.3 For products that need to be transported over long distances, hard waterproof cartons should be added as outer packaging boxes. 8.4 The filter membrane should be stored in a clean and dry storage cabinet to avoid moisture, heat, rain and direct sunlight. Temperature/C
HY/T 053--2001
Appendix A
(Standard Appendix)
Temperature Correction Factor Table
Temperature/C
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