Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T 2356-92
Cellulose triacetate film base
1992-08-25 Issued
Ministry of Chemical Industry of the People's Republic of China
Standard Exchange Network sboo/cm1993-03-01 Implementation
Chemical Industry Standard of the People's Republic of China
Cellulose triacetate film base
Subject content and scope of application
HG/T2356-92
This standard specifies the technical requirements, test methods, inspection rules, packaging, marking and transportation conditions of film base. This standard applies to roll film base made of cellulose triacetate. 2 Milk standard
GB6844
GB:6845
GB6847
Method for measuring surface resistance of film base
Method for measuring thickness of film base
Method for measuring curl of film
ZBG80003
ZBG80004
ZBG81012
3 Product classification
Method for measuring moisture content of film base
Determination method of adhesion fastness of film base layer
Color motion picture base
Film base can be divided into two categories according to its use: black-and-white and color film base; according to its specifications, it can be divided into two types of film base, 120 and 135. 3.1
3.2 According to the nominal length of each reel of film base, it can be divided into 320m, 630m, 1250m, 1860m or other agreed specifications; according to the width of the film base, it can be divided into three types, namely 1140mm, 1145mm and 1150mm. 4. Technical requirements
The main physical properties should meet the indicators specified in Table 1, Table 1
Width limit deviation, mm
Nominal thickness\, mm
Medical lace
Average thickness limit deviation, mm
Coaxial internal friction limit deviation, mm
Depth, mm
Width, mm
Margin, mm
Black and white film base
Not shorter than nominal length
0.100~0.120www.bzxz.net
Ministry of Chemical Industry of the People's Republic of China approved on August 25, 1992135
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Color film base
0.100~0.120
1993-03-01 implementation
Moisture content, %
Optical density
Shrinkage
Curl
Tangent value
Back smoothness
Colorless base
Colored base
Longitudinal shrinkage, %
Transverse shrinkage, %
1/2 sample, mm
1/4 sample, mm
Surface resistance, P
Emulsion bottom layer dry fastness, grade
Coating fastness
Emulsion bottom layer wet fastness, grade
Anti-halation layer dry fastness, grade||tt| |HG/T2356—92
Continued Table 1
Black and white film base
Not less than
Not less than
Not less than
0.25±0.03
-10~+10
2～+2
0.15~0.45
1×1010
Color film base
Note: 1) The nominal thickness of the base of 120 film is 0.100~0.120mm, which is the nominal range specified by the industry standard. The nominal values implemented by enterprises are allowed to differ, but a manufacturer can only choose one value within the range specified in this standard as the nominal value of the enterprise standard. 4.2 Other performance characteristics should meet the following requirements Requirements: 4.2.1 Uniform, flat, smooth, free of bubbles, impurities and stains; 4.2.2 No obvious chain marks, fish scales, pits, convex and concave points, friction lines and stripes, and other defects that may cause changes in film image density.
4.2.3 No cracks, broken edges, scratches, folds and ruffles, etc.; 4.2.4 Each reel of film base should be rolled neatly, without looseness, flaring, or polygonal phenomena; 4.2.5 The coating should be uniform, without delamination or sticking. After washing and processing, it should be clean and free of residues; 4.3 No adverse effects on the photographic performance of the photosensitive film; 5 Test methods
For the test items specified in this standard, if there are no other provisions in the standard, the tests should be carried out under the environmental conditions of temperature 23±2°C and relative humidity 45%~55%.
5.1 Length measurement
The length of each film base is measured by a meter counter, in meters. 5.2 Width measurement
5.2.1 Sampling
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Remove the packaging of the film base, and then discard 2 to 3 turns of the outer film base, and then take a 50cm piece of the whole film base as the test sample for this item and other items for which the sampling method is not specified.
5.2.2 Test
Put the sample flat on a horizontal platform and measure the width of the whole film base with a steel ruler with an accuracy of 1mm, in millimeters. 5.3 Thickness measurement
5.3.1 Average thickness deviation
Refer to the method of GB6845, take a full-width test sample at the head and tail of the same axis base, and measure the thickness of 24 points in total on these two samples. The arithmetic mean of the thickness of these 24 points is taken as the average thickness of the axis base. The difference between the nominal thickness and the average thickness is the average thickness deviation,
5.3.2 Coaxial thickness deviation
The difference between the average thickness and the maximum and minimum values of the thickness of the 24 points is the coaxial thickness deviation, 5.4 Measurement of embossed edge size
Includes measuring the depth, width and margin of the embossed edge. The embossed edge depth measurement refers to the relevant method of thickness determination in GB6845, and measures the base thickness at the non-lace side and the thickness at the lace side of the wide piece respectively. The lace depth is expressed by the difference between the thickness at the lace and the base thickness. Measure once every 5cm along the longitudinal direction of the base, and measure six times on each side. The depth of the embossed edge at each place should meet the requirements. The embossed edge width and margin are measured with a steel ruler with an accuracy of 1mm, in millimeters. 5.5 Determination of moisture content
According to the method specified in ZBG80003
5.6 Determination of optical density
Take a sample after the thickness measurement in 5.3, and use a diffuse transmission densitometer to measure the diffuse transmission density at 10 points equidistantly spaced along the transverse direction of the base, record the readings, and take the arithmetic mean of the 10 data as the result. 5.7 Determination of shrinkage
The sample is equilibrated at a temperature of 23±2℃ and a relative humidity of 45% to 55% for more than 8 hours. Three samples (each with a size of about 100mm×100mm) are cut and marked with vertical and horizontal marks. A special mark plate made of 2mm thick organic glass plate (as shown in Figure 1) and a scriber are used to draw vertical and horizontal scale lines (about 60mm intervals) on each sample. The distance between the vertical and horizontal scale lines is then measured on an Abbe comparator (accurate to 0.01mm) and represented by m and n respectively. The sample is then immersed in water at 40±1℃ for 30min, taken out and dried at 50±2℃ for 30min, and the distance between the vertical and horizontal scale lines is measured again, represented by m and n respectively. The shrinkage is calculated according to formula (1) and (2), and the average value of the three samples is taken as the result. Standard replacement network mr.baaoio.com provides free teaching for various standard industry materials. In the formula: L Longitudinal shrinkage, %;
m',n'-
A Transverse shrinkage, %;
HG/T233ES2
Figure 1 Dimensions of special standard plate for sampling
×100%
Distance between vertical and horizontal scale lines before sample immersion treatment, mm; -Distance between vertical and horizontal scale lines after sample immersion treatment, mm, 5.8 Curl
Tested according to test method B in GB6847, in which the test condition relative humidity stipulates that 20% is adopted 5.9 Tangent value
5.9.1 Test platform
The test platform is 3.1m long and 1.2m wide, with a flat and smooth surface; empty slot
b. Draw a reference line along the length of the platform, 5cm from the edge of the platform. At the center of the reference line, on the side close to the edge of the platform, a pin perpendicular to the platform is installed, and the side of the pin is tangent to the reference line. c. Draw a vertical line perpendicular to the reference line at 1.27m from the pin at both ends of the reference line. The vertical line is marked with a scale of 1mm. The intersection of the vertical line and the reference line is marked as zero. The scale value from the intersection to the edge of the platform is negative, and the opposite direction is positive. The platform is shown in Figure 2.
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HG/T 2356-
Baseline
Figure 2 Dimensions of lubricity test platform
Cut the 3.1m long base sample into two along the longitudinal center line of the sample, 1270
Take one of them, place the knurled side of the base along the base line, with the center of the edge close to the pin, and then press the center of the base with your hand to prevent it from sliding;
Use a brush or a hand wearing a gauze glove to brush both sides in parallel, repeat four times; read the distance from the base edge to the base line at 1.27m from the pin from the scale line, repeat operations b, c, d for the other 1/2 width sample, and record the test data. Then cut the 1/2 width sample into two along the longitudinal center line to become 1/4 width samples, and operate according to steps b to e to measure the tangent value of the 1/4 sample respectively.
5.9.3 Data processing
Add the readings at both ends of the 1/2 width sample to obtain the tangent value of the 1/2 width sample. The average of the two 1/2 width tangent values is the 1/2 width sample tangent value; b. The data processing of the 1/4 width sample tangent value is the same as the method specified in item a. 5.9.4 Result expression
A positive value indicates that the base is tight in the middle, loose at the edges, and bent toward the middle; a negative value indicates that the base is loose in the middle, tight at the edges, and bent toward the outside. 5.10 Back surface lubricity measurement
5.10.1 Instrument
Tilt plane instrument (see Figure 3), with a slider mass of 60 to 100 g. Since this method uses gravity as the power, the tilt plane instrument must be installed in a stable and horizontal position for detection, otherwise a large error will occur. Standard loss network: 62080.c0m5.10.2 Test method
HG/T2356
Figure 3 Schematic diagram of the structure of the tilt plane instrument
The substrate to be tested is cut longitudinally into a sample with a length of 15cm and a width of 1.5cm. a.
The clamp is installed on the plane of the tilt plane instrument, with the back of the substrate facing up, and the sample is clamped on the clamp and fixed. c
Place the slider in an appropriate position.
Adjust the tilt angle of the plane from small to large until the slider just slides down continuously, and record the scale reading at this time. 5.10.3 Result expression
The tangent value of the angle corresponding to the scale reading is the lubricity value of the back of the substrate. 5.11 Surface resistance measurement
Perform according to the method specified in GB6844.
5.12 Coating fastness
Includes emulsion base fastness and anti-halation layer fastness.6
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Determined according to the method specified in ZBG80004,
5.13 Determination of the influence on the photographic performance of film HG/T2356-92
Cut the sample, apply the photographic emulsion, and measure it according to the method specified in the film product standard 6 Inspection rules for photographic performance
Follow the provisions of ZBG81012-7,
Packaging, marking, purchase, storage and transportation
Follow the provisions of ZBG81012-8,
Additional remarks:
This standard is proposed by the Science and Technology Department of the Ministry of Chemical Industry of the People's Republic of China. This standard is managed by the First Film Factory of the Ministry of Chemical Industry, the technical management unit for standardization of photosensitive materials of the Ministry of Chemical Industry. This standard is drafted by Wuxi Film Factory, and Shanghai Photosensitive Film Factory and Xiamen Photosensitive Materials Co., Ltd. participated in the drafting. The main drafters of this standard are Xie Qingyao, Gao Yuan, Wang Xinfu and Zhang Yiping. Standard stirring network wm.baroto.com All kinds of standard industry information are free to download. People's Republic of China
Chemical Industry Standards
Cellulose triacetate film base
HG/T2356-92
Editor Chemical Industry Standards Editorial Department ||tt| |(Standardization Research Institute of the Ministry of Chemical Industry)
Postal code: 100013
Printing Standardization Research Institute of the Ministry of Chemical Industry
Copyright reserved. No reproduction allowed
Format 880×12301/16 sheets/6 Number of words 14000 First edition in June 1993
First printing in June 1993
Print run 1-500
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