This technical condition is applicable to the pulp used in making various speaker cones. SJ 2316-1983 Technical Conditions for Speaker Pulp SJ2316-1983 Standard download decompression password: www.bzxz.net
This technical condition is applicable to the pulp used in making various speaker cones.

Standard SJ2316-83 of the Ministry of Electronics Industry of the People's Republic of China
Technical conditions for paper pulp used in loudspeakers
Published on March 1, 1983
Implemented on October 1, 1983
Approved by the Ministry of Electronics Industry of the People's Republic of China Standard Technical conditions for paper pulp used in loudspeakers of the Ministry of Electronics Industry of the People's Republic of China
This technical condition is applicable to the pulp used to manufacture various paper cones of loudspeakers 1 Classification
1.1 Paper pulp used in loudspeakers is divided into three categories: A, B and C. Category A: unbleached sulfite pulp.
Category B: bleached sulfite pulp.
Category C: unbleached sulfate pulp.
1.2 Paper pulp used in loudspeakers is divided into the following categories according to the wood species: fish scale pine, stinking pine, sand pine unbleached sulfite pulp 1.2.1
fish scale pine, stinking pine, sand pine bleached sulfite pulp. Masson pine unbleached sulfite pulp
Red pine and white pine unbleached kraft pulp.
Fish scale pine and stinking pine unbleached kraft pulp
2 Technical requirements
2.1 The performance indicators of paper pulp for speakers shall meet the requirements of Table 1. Issued by the Ministry of Electronics Industry of the People's Republic of China on March 1, 1983 1
SJ2316-83
Implemented on October 1, 1983
Indicator namebZxz.net
Hardness (Kappa number)
Not less than
20°SR
20°SR
20°SR
45°SR
60°SR
Resin, fat and tree waxNot more than
Original pulp beating degree
Not more than
Moisture content (calculated moisture)Not more than
Dust degree,
500g absolute dry No more than
5m in the pulp*Pulp board towel
No more than
5m Dust larger than 5mm2 in the pulp board
Dust, spotted rust, resin block
Kg/ems
Kg/emt
mm*/500g
piece/5m
piece/5mt
0.1~2.5mm2
Dust 2000
3.0~5.0mm2
Dust 10
Not allowed
SJ2316-83
0.1~3.0mm
Dust 70 00
3.0~5.0mm2
Dust 25
0.08~2.50mm2
Dust 150
3.0~5.0mm2
Dust 6
Not allowed
0.25~1.0mm2
Dust 1000
1.0~3.0mml
Dust 25
Not allowed
0.25~2.0mml
Dust 700
1,0~2.0mm2
Dust 10
Not allowed
Test method
GB1546-—79
GB1542-79
GB453-79
GB457-79
GB454—79
QB112—61
GB741-79
QB137—81
GB1541-76
GB1541—79
Use Schober type beating degree
The copper mesh is 80 mesh
SJ2316--83
The elastic modulus and loss factor of loudspeaker pulp shall comply with the requirements of Table 2. 2
Indicator name
Elastic modulus (E)
×1010 dyne/cm2
Loss factor (6)
3.0~4.8/3.0~4.5
Test method
SJ2317—83
SJ2317—83
Note: ①The test paper is made according to the light standard QB140-61<Determination of mechanical strength of chemical pulp and mechanical wood pulp, with a beating degree of 20SR and a basis weight of 200 g/m*
②The indicators in this table are not subject to supervision and assessment.
3 Acceptance rules
3.1 The products shall be inspected by the quality inspection department of the manufacturer and shall be accompanied by a quality certificate. 3.2 The user has the right to check whether the various indicators of the batch of products meet the requirements of this technical condition in accordance with the provisions of this technical condition.
3.3 If one of the test results does not meet the requirements of this technical condition, the sample should be doubled and re-tested for the unqualified item; if the re-test result is still unqualified, the whole batch of pulp pieces will be unqualified. If the re-test result meets the requirements of this technical condition, it will still be qualified.
3.4 ​​The sampling shall be carried out in accordance with the provisions of GB740-79 "Method for taking average samples of chemical pulp". 4 Packaging and marking
4.1 The weight of each piece of pulp shall not exceed 170Kg. 4.2 Different categories and types of pulp shall be packaged separately. 4.3 The following marks shall be marked on the packaging of each piece of pulp: 4.3.1 Product name and brand:
4.3.2 Batch number and number of pulp pieces;
4.3.3 Net weight and gross weight;
4.3.4 Manufacturing date:
4.3.5 Production unit.
5 Storage and Transportation
5.1 The pulp should be properly stored to prevent it from being affected by rain, snow and ground moisture. 5.2 The pulp should be transported in a clean and covered vehicle. It can also be transported in a uncovered carriage, but it must be covered with a rag to prevent rain, snow and water from wetting the finished product. 5.3 During transportation and stacking, pulp must not be dropped from a high place.
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