HG/T 2914-1997 Determination of anti-adhesion properties of films and film bases
Some standard content:
ICS37.040.20
Registration No.: 418--1997
Chemical Industry Standard of the People's Republic of China
HG/T 2914 ---1997
Determination of Anti-adhesion Properties of Film and Film Base
Method for determination of anti-adhesion properties of photogranhic film and film base1997-03-23 Issued
Ministry of Chemical Industry of the People's Republic of China
1997--10-01 Home
HG /1 2914 - 1997
This standard is a revised version of ZB/TG80002-88 "Determination of Anti-adhesion Properties of Films and Film Bases". The standard makes the following changes to the test conditions of ZB/TG80002-88: a) Temperature and control method The equilibrium and pressurized humidity of the film and film base are changed to 79%; the humidity control is changed from a large constant temperature and humidity chamber to a small environment-humidifier, and Appendix A (Standard Appendix) is added. b) The film test temperature is changed to be consistent with the film base test temperature, which is 40C, c) The equilibrium time of the film and film base is unified to 24 hours, and the pressurization time is unified to 48 hours. This standard replaces ZB/TG80002-88 from the date of entry into force. This standard is proposed by the Technical Supervision Department of the Ministry of Chemical Industry. This standard is under the jurisdiction of China Lucky Film Corporation, the technical unit responsible for standardization of photographic materials of the Ministry of Chemical Industry. This standard was drafted by China Lucky Film Corporation, Alme Photographic Chemical Company, Fuda Photosensitive Materials Co., Ltd., and Shanghai Photosensitive Materials Co., Ltd. The main drafters of this standard are Zhang Yongli, Shi Xiankai, Xie Qingyao, Gao Yuan, and Fang Jianguo. Fan Yuan
Chemical Industry Standard of the People's Republic of China
Film: Determination of the antisihesionor optrty cf phtttgraphic im ant fim base
Method Far diterminationof the antisihesionor optrty cf phtttgraphic im ant fim baseHG/T 2914 --- 1997
Replaces ZB/TG80002—88
This standard specifies the determination device, test conditions, test procedures and calculation methods for the antisihesion or adhesion properties of films and film bases. This standard is applicable to the determination of the antisihesion or adhesion properties of films and film bases. Definitions
This standard adopts the following definitions.
&) Adhesion
Affected by the source, wet spots and pressure, the contact surface structure of the two coated surfaces of the film or base is damaged. 6) Anti-adhesion properties
The surface coating of the film and the base has the ability to resist mutual adhesion. The percentage of anti-adhesion is shown. 3 Test method
3.1. Constant temperature box or other similar device. Temperature rat bowl 1, 3.2 Apparatus: It is recommended to use a laboratory full-flow airtight dryer with a diameter not exceeding 201m and a tax not exceeding 0. The constant coagulant is a saturated sulfuric acid aqueous solution. The test container can also use other sealed small intimate devices. The requirements are shown in Appendix 4. The relative humidity limit difference is ±2%
3.1.3 Stainless steel pressing plate, the size is selected according to the low strength specified in this standard. The recommended pressing plate plane size is 40mmx40mm or 54mmx25mm (1600mm\), and the roughness of the pressing plate in contact with the sample is R, 2.5jm. 3.1.4 Make a 2mm×2mm grid pattern on the polyester film base, and the edge size of the pattern is 100mm×200mm to measure the adhesion area of the modulated sample.
3.2 Test conditions
The temperature, humidity and pressure test conditions for sample balance and adjustment are as shown in Table 1. If the product requires, other temperatures and humidities can also be selected for testing.
Approved by the Ministry of Chemical Industry of the People's Republic of China on May 23, 1997, and implemented on October 1, 1997
Sample balance
Sample pressure section
HG/T 2914--1997
Table 1 Test conditions for sample balance and pressure modulation Temperature
Relative humidity
The test should be carried out at a temperature of (23±5) and a relative humidity of (50～70)%. Time
3.3 Sample preparation
Take samples from the same part of the sample to be tested and cut them into 40mm×40mm or 64mm×25mm samples (consistent with the size of the pressure plate used). Take at least 6 pieces for testing, number them, and divide them into three pairs. The samples should be clean and free of scratches and contamination on the surface. 3.4 Operation Procedure
3.4.1 Place the humidity conditioning desiccator in a constant temperature box and adjust the constant temperature box to the temperature specified in the test. Prepare a supersaturated aqueous solution of ammonium hydroxide at the bottom of the desiccator, cover it and wait for the mixture to balance before use. 3.4.2 Place the sample to be tested in the constant humidity box. Do not let the samples touch each other. Cover it. Modulate for 24 hours. The pressure plates should be placed in the constant humidity box at the same time.
3.4.3 After modulation, the samples are matched according to the number, so that the back of one sample and the emulsion layer (bottom layer of the film base) of the other sample face each other and are placed between two pressure plates. The samples and the plates are completely aligned, placed in the constant humidity box, immediately covered, and modulated for 48 hours. 3.4.4 Take out the sample when the pressure modulation is reached, separate the overlapping samples, place the measurement grid on the sample, observe under reflected light, record the adhesion area, and express it in the number of grids. 4 Result Calculation
The measurement result is calculated according to formula (1).
Wherein: n---anti-adhesion percentage, %
s-sample adhesion area (number of adhesion grids multiplied by 4). mm2So sample area, mm2.
Results Take the arithmetic mean of the results of three pairs of samples. 5 Repeatability
The sample is measured 5 times, and the relative standard deviation of the results should not be greater than 20%. 6 Test report
The test report should include the following content:
a) Sample name, number, axis number, manufacturer name; Test conditions: overflow, relative humidity, modulation time, pressurization time, pressure; b)
Remaining data and calculation results of the test;
HG/T2914-1997
Description of any abnormal conditions found in the test; d)
Test date ;
Measurement personnel,
Appendix A (standard positive)
A.1 Standard
Method for controlling relative humidity of small modulator with saturated saline solution-water solution to maintain constant humidity in small modulator for modulation and test" This method is ISO483:1988≤Plastic-Method for controlling relative humidity of saline solution This method uses a closed container with a temperature of 5C~60 and a volume of less than 200am that is not often opened to control the relative humidity of the air. The allowable deviation is ±2%.
A.2 Reagents and liquids
The reagents used in the test should be analytically pure, and the water should be distilled water or water of equivalent purity. At a given humidity, the relative humidity of the air in the saturated solution and closed container is shown in Table A.1. In order to maintain the humidity, the solution must have been exposed to the atmosphere.
A.1 Temperature 5℃～0, supersaturated salt solution maintains relative humidity of air in closed container Relative humidity, %
Saturated dynamic aqueous solution
Potassium hydride KOH
x Hydrated lithium LO
Potassium 2-hydrated ferric oxide (CHCOOH)
Magnesium chloride hexahydrate (MCl·6H,0)
Potassium magnesium sulfate dihydrate (K0,2,02)
Mn·HO
Sodium thiocarbamide dihydrate (Nu2CrO2·2H,0)Ammonium nitrate (NH4NO4)
Sodium nitrite (NaNO4)*
Sodium chloride (NaCl)
Ammonium sulfate (NH4SO4)||tt ||Potassium chloride (KCl)
Potassium nitrate (KNO,)2)
Potassium sulfate (K,SO)
3) Potassium hydroxide is corrosive and should not be allowed to come into contact with the skin.
2) These salts are recommended for a specific humidity range because humidity changes very little with temperature at 20°C to 30°C.
3) Chain salts can cause corrosion to appliances.
4) To reduce the discoloration of sodium nitrite, 1% to 2% tetrasodium can be added. After addition, the relative humidity will decrease by 1% at 20°C.
4
.3 Apparatus
A3.1 If the volume of the test container is less than t5dm, the height of the container should not exceed the minimum solution surface size when there is no air circulation. If the container is equipped with air circulation, the height can be 1.5 times the minimum solution surface size. A.3.2 The container should be simple in shape, preferably short, and made of a material that is resistant to the salt solution. It should be free of cracks and easy to clean the inner surface. The liquid tank should be convenient for changing the solution.
A.3.3 If the volume of the container is between 15 dm and 200 dm, there should be an air circulation device in the container, such as a fan, to make the temperature of each part of the container consistent and ensure the required deviation of relative humidity. The wind speed at the bulb of the thermometer should be about 3 mL/sA. 3, 4 To keep the temperature constant, the small test container can be placed in a large constant temperature box or a cautious room, or a channel overflow can be installed in the test container. The temperature difference should be controlled within ±1°C.
To keep the temperature constant, the container should be insulated and should be strictly sealed. A.4 General provisions of the procedure
A.4.1 The test load depends on the hygroscopicity of the conditioning material and the difference between the humidity in the container and the moisture content of the material to be conditioned. Check the humidity regularly and observe the time it takes for the sample to reach equilibrium
A. 4.2 When the sample volume () and surface area (S) have a high ratio V/S and there is no air circulation, the surface area of the sample should not exceed the surface area of the solution. The test area of the small ratio (thin film) test is 3 times the surface area of the solution. When there is air circulation, the surface area of the test sample can be increased to 3 times the surface area of the sample without air circulation. A. 4.3 There are fixed supernatants in the saturated salt solution. The test container should be cleaned regularly, and the salt in the seepage solution should be removed when the solvent is replaced.
People's Republic of China
Chemical Industry Standard
Determination of Anti-adhesion Properties of Film and Film Base
HG/T2914—1997
Chemical Industry Standard Editing and Publishing Group
(Institute of Standardization and Certification of the Ministry of Chemical Industry)
Postal Code: 100011
Institute of Standardization and Certification of the Ministry of Chemical Industry
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First Edition in December 19T
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