This standard specifies the abrasion resistance requirements and test methods for coated eyeglass lenses. This standard applies to coated eyeglass lenses. QB/T 2702-2005 Abrasion resistance test method for coated eyeglass lenses QB/T2702-2005 Standard download decompression password: www.bzxz.net

ICS 11.040.70
Classification No.: Y89
Registration No.: 157542005
Light Industry Standard of the People's Republic of China
QB/T2702—2005
Test method of abrasion-resistance for coating of spectacles lenses2005-03-19Published
National Development and Reform Commission of the People's Republic of ChinaImplemented on 2005-09-01
QB/T 2702-2005
This standard mainly refers to IS0/CD15258 "Test Method for Abrasion Resistance of Ophthalmic Optical Spectacle Lenses", [SQ/DIS8980-5:2004 "Ophthalmic Optical Rough-edged Spectacle Lenses Part 5: Minimum Requirements for Explicit Abrasion-resistant Spectacle Lenses" and ASTMD1003-61 (1997) "Test Method for Transparent Plastic Light Transmittance and Haze". Appendix A, Appendix B and Appendix C of this standard are normative appendices. This standard was proposed by China Light Industry Federation. This standard Under the jurisdiction of Jinguo Optical Standard Promotion Center. Drafting unit of this standard: National Optical Glasses and Porcelain Products Quality Supervision and Inspection Center. Main drafters of this standard: Yang Jianrong, Meng Jianguo, He Xiuren. This standard is published for the first time.
1 Scope
Abrasion resistance test method for coated eyeglass lenses
This standard specifies the abrasion resistance requirements and test methods for coated eyeglasses. The standard is applicable to coated eyeglass lenses.
2 Normative reference documents
QB/T2702—2005
The clauses in the following documents become the clauses of this standard through reference in this standard. For referenced documents with a date, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard should study whether the latest versions of these documents can be used. For referenced documents without a date, the latest versions are applicable to this standard. GB/T2410 Test method for light transmittance and haze of transparent plastics QB2506—2001 Optical resin eyeglass lenses
3 Specifications Definitions
The following terms and definitions apply to this standard. 3.1
Haze
The ratio of the amount of incident light transmitted through the sample to the total amount of transmitted light, that is: H-
Wherein,
7-Incident light flux, %;
Total transmitted light flux, %;
-Scattered light flux caused by the device, %;
7-Scattered light flux caused by the device and the lens, % 3.2
Coated lens
It refers to a lens with a film layer on the surface (single or double sides) of the lens to make the lens have certain characteristics. 4 Requirements
4.1 Environmental conditions www.bzxz.net
Ambient temperature: (23 ± 5) ℃, ambient relative humidity: (50 ± 20) %. 4.2 The haze meter
should meet the requirements of the test instrument in GB/T2410: 4.3 The lens friction instrument
should meet the following requirements:
4.3.1 The applied pressure should be consistent with the convex normal direction of the lens, OB/T 2702-2005
4. 3.2 The frequency of reciprocating friction is 100 times/min (defined as one reciprocating motion). 4.3.3 Reciprocating friction amplitude: a friction track of about 40mm in length is formed on the lens. 4.3.4 Friction area: an area of ​​about 40mmX40mml around the geometric center of the lens. 4.3.5 There should be facilities for fixing the sample to ensure that the sample is not moved during the friction test. 4.4 Steel wool
000 steel wool, stacked more than 5 layers (single delivery thickness is about 5mm), the plane size is about 40mm×40mm. 4.5 Sample requirements
Uncut lenses with a radius of curvature greater than 80mm and an absolute value of top angularity not greater than 0.50D on the front surface of the tested lens. 4.6 Abrasion resistance requirements for coated lenses
After testing in 5.4: Calculate the haze H and make judgments according to the corresponding standard requirements: 4.7 Minimum abrasion resistance requirements for coated lenses
After testing and inspection by the method in Appendix C, make judgments according to the corresponding standard requirements. 5 Test method
Preparation of instruments
After the friction tester and the tribometer are connected to the power supply, they should be preheated for 30 minutes: Calibrate the stopper and set the parameters so that the instruments are in normal working condition (see Appendix Figure B.2 for the optical system of the tribometer: see Appendix Figure A.3 for the schematic diagram of the tribometer, and see 5.6.1 in QB2506-2001 for the corresponding technical parameters). 5.2 Preparation of eyeglass lenses
The surface of the tested lens should be clean and any product residue should be removed. Place under the environmental conditions in 4.1 for more than 2 hours: Make four marks on the edge of the lens (make a mark every 90° rotation, for example: 1, 2, 3, 4). 5.3 Preparation of steel wool
000 steel wool should be folded into the shape shown in Figure A.2: It is recommended to fold 8 layers (single layer thickness is about 511m). The flat size is recommended to be 40mmX60)mm: Its shape is shown in Figure A.1. At this time, its mass is about 5g. The steel wool should be smooth, burr-free and arranged in order after friction. The friction surface of the new steel wool should be run-in (load 750: reciprocating friction 200 times): The friction surface of the steel wool should be checked frequently. If it does not meet the requirements, it should be replaced. Stick steel wool to the center of the lower end of the friction instrument die (see Figure A.3) so that the steel wool grain is perpendicular to the friction direction (see Figure A.1). 5.4 Test of abrasion resistance of coated lenses
5.4.1 First, place the lens on the haze meter to measure the initial haze value of the sample before abrasion. Then, place the lens at mark 1 to obtain the first measurement value, and then rotate it 90 degrees to obtain the measurement values ​​at the other three marks in turn. Take the arithmetic mean of the four measurements. 5.4.2 After the lens is tested in 5.4.1, place it on the abrasion meter, on the convex surface of the lens, so that its center coincides with the center of the pendulum and fix it. Add a load base weight to the lower leather beam at the upper end of the abrasion meter die, and apply a load (weight beam, die, load base weight, steel velvet, etc.) of (750 + 15) g to the convex surface of the sample. Set the counter value to 1000 times, start the abrasion meter, and rub it back and forth 1000 times. 5.4.3 Wash the lens that has undergone the friction test in 5.4.2, dry it with cotton paper or let it air dry, cover it on the haze meter, and test the haze value H of the lens after friction according to the measurement method in 5.4.1: Obtain four measurement values ​​in sequence and take the arithmetic mean value H of the four measurement values. Note 1: It is encouraged to use other test instruments equivalent to this standard. Note 2: Users can use this as a basis for controlling production or judging products. For different products, the total weight of the friction instrument and the number of reciprocating frictions can be changed. 6 Calculation of test results
6.1 The haze value H of each sample is calculated according to formula (1): T
[×100%
6.2 The sample test result AH is calculated according to formula (2): W where:
A1 is the difference between the haze value of the sample after friction and the haze value at the end of friction; 11. — is the arithmetic mean of the four haze measurement values ​​after friction; H, is the arithmetic mean of the initial haze measurement values ​​after friction for four times. The effective value of the calculation result is accurate to 0.01%. 6.3 The standard deviation value S is calculated according to formula (3): (XX)
W where:
is the arithmetic mean of a group of measured values:
is a single measured value;
is the number of measured values.
Test report
The test report may include the following contents:
Standard number and test method:
Product name, specification, brand, source, manufacturer, etc.: Test period and environmental conditions;
Number of samples, center thickness:
According to the test accuracy, the arithmetic mean and standard deviation of the haze of the Anongda sample shall be used to determine the test results in accordance with the provisions of the corresponding product standards. The inspection and verification personnel shall sign.
QB/T 2702—2005
QB/T2702—2005
Figure A.2 Folding of steel wool
Appendix A
(Normative Appendix)
Diagram of steel wool and friction instrument tube
Figure 4.1 Direction of steel wool placement
Geyuan Fangsi
Chuangjiaofang
Figure A.3 Schematic diagram of lens grinding instrument
-h-
) Avoided light inspection
Appendix B
(Normative Appendix)
Visual inspection device and mildew determination optical system
QR/T2702-2005
b) Reflected light inspection
Figure B.1 Visual inspection device for lens defects; without the aid of magnifying device, the lens is inspected against a background of the field of view. Figure B.【Recommended inspection system installation, inspection lamp uses at least 400m luminous flux,! 15W fluorescent lamp or two 8W fluorescent lamps. 1 Light distribution: 2-condenser: 3-light bar: 4-modulator: 5-mirror: 6-selector: 7-double ball: 8-light pool: 9-reflection standard group; 10-exit retention 1: 11-incident window signal Figure B.2 Optical system of haze meter
QB/T2702--2005
c.1 Preparation
C.1.1 Friction tool
Appendix C
(Normative Appendix)
Minimum requirements for wear resistance test method
Composition structure and appearance see Figure C.1·The force applied by the friction tool is calibrated at (5±1)N (this tool is designed according to "Hooke's law" and other mechanical devices can also be used).
C.1. 2 Rubber head
Figure C.1 Schematic diagram of friction tool and absorbent gauze installation Text
Image
Tax and
(Folding service
The hardness of the rubber head should reach the international rubber hardness TSO48 (75 ± 5) (TRHD). The diameter of the rubber head is 6.5mm~7.0mm. The rubber head should have sufficient length, but the part exposed in the friction tool should be less than 3mm. C.1.3 Absorbent gauze
The absorbent gauze is natural color, warp yarn 41 yarn/25mm~47 yarn/25mm, line yarn 33 yarn/25mm~39 yarn/25mm, total yarn 76 yarn/25mm2~84 yarn/25mm. Fold the [00mm×100mm absorbent gauze into 12 layers (about 50mm×17mm), wrap it outside the rubber and tie it to the friction tool The sample is placed on the chuck (see Figure C.1) and clamped with a clamp. C.1.4 Sample
For unscratched lenses, the radius of curvature of the front surface should be greater than 80 mm. The lens surface should be thoroughly cleaned before abrasion to remove any particles and foreign matter, and there should be no visible scratches.
C.2 Test
Fix the sample so that it cannot move during the test. Hold the holder to maintain a pressure of (5±1)N and rub the lens surface back and forth for 25 rounds. The angle between the abrasion tool and the normal line of the lens surface should be maintained at (0±5). The abrasion track should pass through the geometric center at ±2mm, with a length of (30±5)mm and an average rate of (1±1) round/s. Clean the lens surface and inspect it. C.3 Inspection
Use the transmitted light and reflected light inspection device of Figure B.1 to qualitatively inspect whether there are visible scratches within the abrasion range of the lens.
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