HG 3054-1988 Determination of linear dimensions of latex sponge HG3054-1988 standard download decompression password: www.bzxz.net

UDC678.4.031:531.7
National Standard of the People's Republic of China
GB 988988
Adjusted to: HGh30sy-t88
Determination of linear dimensions of latex foam
Latex foam
Published on 198809-22
Determination of linear dimensions1989-05-01Implementation
State Bureau of Technical Supervision
National Standard of the People's Republic of China
Determination of linear dimensions of latex foam
Eatex foam
Determination of linear dimensionsThis standard is equivalent to the international standard 1S01923-1981 "Foam plastics and rubber 1 Subject content and scope of application
UDC 678. 4: 031
GD 9889Www.bzxZ.net
-Determination of linear dimensions".
This standard specifies the method for determining the linear dimensions of latex sponges. This standard is applicable to the measurement of the linear dimensions of sponge products or samples made of natural latex and synthetic latex as the main raw materials, and specifies the characteristics and selection of measuring instruments.
Linear dimensions The shortest distance between two fixed points, two parallel lines or two parallel surfaces determined by the corners, edges or surfaces of the sponge sample shall be measured according to the instruments specified in Chapter 3.
3 Measuring instruments
3.1 Thickness gauge: The measuring area is about 10cm*. The contact pressure is 100±10Pa, and the reading accuracy is 0.35mm. 3.2 Vernier caliper: The reading accuracy of the vernier is 0.1mm. 3.3 Metal ruler or metal tape measure: The reading accuracy is 0.3mm. Steps
The selection of measuring instruments should be based on the accuracy required for the measured dimensions (see Table 1). 4.3
When the instrument accuracy is required to be 0.05mm, a thickness gauge (3.1) should be used. For specimens with a size greater than 10mm, the accuracy does not usually need to be 0.05mm. b. When the instrument accuracy is still required to be 0.1mm, a vernier caliper (3.2) should be used. When the size is greater than 100mm, the accuracy does not usually need to be 0.1mm. In this case, a thickness gauge is also used, but the accuracy of the instrument does not need to be higher than that of a vernier caliper. When the instrument accuracy is required to be 0.5mm, a metal ruler or metal tape measure should be used. In this case, a vernier caliper can also be used, but its accuracy does not need to be higher than that of a metal ruler or metal tape measure. Description: 1) 1S01923-1981 is the sub-table. This standard is for thickness gauges. Approved by the Ministry of Chemical Industry of the People's Republic of China on August 8, 1988 and implemented on May 1, 1989. Size: 10~31t0. 4.2 Measurement position and quantity: Viscosity: GB 9889
General Use
SRH Thickness Gauge
Vernier Caliper
Metal Ruler or Tape
Measurement Use
SRH Thickness Gauge
SRH Thickness Gauge
Or Vernier Caliper
Metal Ruler or Tape, Less Than
130 With SRH Thickness Gauge
Readings
Turn to the value
The number of measurement locations depends on the size and shape of the sample but should be at least 5. To get a good average, the measurement locations should be widely distributed. Take the average of three readings at each measuring point and calculate the average of the 5 (or more) readings. When measuring the thickness of latex sponge products, a distance of about 50 mm should be left. 4.3 Measuring with a stop gauge (3.1)
Measure on the table of the instrument. During the measurement process, the sample should be flat, stretched, and tension-free, and placed flat on the table. The reading of the thickness gauge is accurate to 0.1mm.
Measure with a vernier scale (3,2)
The vernier scale should first be adjusted to a position close to the measured inch. When the measuring surface of the vernier caliper just touches the surface of the sample without squeezing or damaging the sample, the measuring position is reached. The reading of the vernier caliper is accurate to 0.2rmtrf. 4.5 Measuring with a metal ruler or metal tape measure (3.3) The sample should be in a flat, stretched, and tension-free state. The metal ruler or metal tape measure should not cause deformation or damage to the sample. The reading of the metal ruler or metal tape measure is accurate to! If the sample does not have straight edges, a benchmark should be set up between the two parallel lines to avoid visual errors. 5 Report
The report should include the following:
The standard or standard name based on which the test is conducted; The type and number of the sample;
The measuring instrument used;
The test results, with dimensions in meters;
Any deviations from the prescribed test procedures. Note:
1] 15019381981 allows the use of sample shape, but this standard is changed to measure thickness. There is no such provision in 215S0!9231981. There is no such provision in 311S019231981.
GB 9889... 88
Appendix A
SRH digital thickness gauge
(reference)
SRH digital thickness gauge is suitable for the thickness measurement of latex sponge.SRH digital thickness gauge meets the accuracy and technical requirements of measuring instruments specified in Article 3.1 of this standard (see Table A1). Table A1
Maximum measuring accuracy
Measurement of contact surface!
SRH digital thickness gauge is composed of the following components: a.
Measurement of contact surface
100±11
Transmission system: micro motor, transmission gear, transmission screw, rolling bearing, guide, measurement system: photoelectric system, counting system, measurement head, table, complete machine: chassis, control panel, machine foot, side cover, measurement accuracy
GB 9889 --88
SRH Schematic diagram of digital thickness gauge
1-guide: 2-drive screw: 3-measuring contact: 4-aluminum plate; 5-digital display screen: 6-machine foot: 7-speed knob; 8-down switch 9-power switch:
10-travel and close
Additional instructions:
This standard is prepared by the Institute of Latex Industry of the Ministry of Chemical Industry. This standard is prepared by the Institute of Latex Industry of the Ministry of Chemical Industry, and the main contributors of this standard are Ma Huichu.
11-display lamp; 12-chassis
People's Republic of China| |tt||National Standard
Determination of Linear Dimensions of Latex Sponge
GB9889RK
China Standard Publishing House
(Beijing Fuwai: He)
China Standard Publishing House Beijing Printing Factory Printing
Xinhua Bookstore Beijing Distribution Office Distributed by Xinhua Bookstore in various places. Copyright reserved. No reproduction allowed
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Mathematics 8
1980-6 Day Tour-First Edition 1989 June First Printing Printing 1-2 500
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