GB 7969-1987 Power cable paper GB7969-1987 standard download and decompression password: www.bzxz.net

National Standard of the People's Republic of China
Electric power cable paper
Paper
This standard applies to power cables or other electrical insulation paper of 35kV and below . 1 Product classification
1. 1 Products are divided into three grades: DLZ-A, DLZ-B, and DLZ-C. 1.2 Thicknesses are divided into three types: 80, 130, and 170 m. GB 7969-87
1.3 power cable paper is roll paper. The roll width is 625±5mm, and the roll diameter is 650~700mm. Other specifications are produced according to ordering contract.
2 Technical Requirements
2.1 Technical indicators must comply with Table 1. 2.2 The raw materials are made of 100% sulfate insulating wood pulp. The fiber structure of the paper should be uniform, and there should be no undissociated fiber bundles, spots, folds, cracks, holes and other paper defects that would affect its use. Table 1
Indicator name
Thickness
Tightness
Tensile strength
Not less than
Elongation
Not less than
Tear strength
Transverse direction
Folding endurance
Vertical and horizontal average
Power frequency breakdown voltage
Dry paper dielectric loss
(g)(100℃)
horizontal
vertical
horizontal
not less than
not less than
not Less than
Not greater than
Unit
m
g/cm
kN/m
DLZ-A

DLZ-B
definite
DLZ-C
80±5.0|130±7|170±8|80±5.0/130±7/170±880 ±6.030±8.c170±10.0.85±0.07
0.85±0.05
5.90
(9.00)
(kgf/15 mm)
%
mN(gf)
times
V/layer
%
2.90
(4.50)
2.0
6.0
540
(55.0)
1000
600
10.5
(16.0)||tt| |4.90
13.0
(20.0)
6.50
5.90
10.5
13.0
4.90||tt| |(9.00)(16.0)(20.0)
(7.50)
2.90
4.90
6.50
2.60
(4.50) /67.50)(10. 0)(4.00)
(7.50)
(10.0)1
2.2
6.5
1080||tt| |(110)
1470
(150)
2000
950
0.70
Ministry of Light Industry of the People's Republic of China 1987-07- 29Approved1200
2.0
6.0
540
(55.0)
1000
600
2.2||tt ||6.5
1080
(110)
1470
(150)
2000
950
1200| |tt||1.9
5.7
540
(55.0)
1000
800
0.85±0.10
9.50
(14.5)
4.20
(6.50)
11.8
(18.0)
5.90
(9.00 )
2.0
6.0
1080
(110)
1470
(150)
2000||tt ||950
1200
Implemented on 1987-12-01
227
Indicator name
Conductivity
Not greater than||tt ||water extract pH value
air permeability
ash content
delivery moisture
3 test methods
not greater than
not Greater than
3.1 Thickness, tightness
Unit
ms/m
μm/Pa·s
(mL/min)
%
%
GB7969—87
Continued Table 1
Regulations
DLZ-A
6.0~ 8. 0||tt ||DLZ-B
10
6. 5 ~ 8. 5
0.510
(30.0)
1.00
6.0~ 9.0
Measured according to GB451 "Method for determination of size, skewness, basis weight, thickness and tightness of paper and cardboard". 3.2 Tensile strength and elongation
are measured according to GB453 "Method for Determination of Tensile Strength and Elongation of Paper and Paperboard". 3.3 Folding endurance
is measured according to GB457 "Method for determination of paper folding endurance". 3.4 Air permeability
is measured according to GB458 "Method for Determination of Paper Air Permeability". 3.5 Tear degree
is measured according to GB455 "Method for Determination of Tear Strength of Paper and Paperboard". 3.6 Power frequency breakdown voltage
Measured according to GB3333 "Cable Paper Power Frequency Breakdown Voltage Test Method" 3.7 Dielectric loss tangent tg (100℃) According to GB3334 "Cable Paper Dielectric Loss Tangent (tgo) Test Method "Bridge method" determination. 3.8 Conductivity
is measured according to Appendix A.
3.9pH value
is measured according to GB1545 "Method for determination of acidity and alkalinity of aqueous extracts of pulp, paper and cardboard". 3.10 Ash content
is measured according to GB463 "Determination of Ash Content of Paper and Boardboard". 3.17 Moisture
is measured according to GB462 "Method for Determination of Moisture of Paper and Boardboard". 4 Inspection rules
4.1 The manufacturer should ensure that the product complies with the provisions of this standard. Each roll of paper should be accompanied by a product certificate. Customized
DLZ-C
6.5~~8.5
4.2 User acceptance shall be based on the number of pieces delivered per batch. The delivery test shall be carried out in accordance with the provisions of GB2828 "Batch-by-Batch Inspection, Counting and Sampling Procedures and Sampling Tables".
4.3 Inspection items are divided into heavy defects and light defects. The indicators of heavy defects are tensile strength, breakdown voltage, and pH value. Other indicators are minor defects. The inspection level is based on the general inspection level (I). The secondary normal sampling heavy defect index implements the qualified quality level 4.0. The light defect index implements the qualified quality level 6.5 (the qualified quality level is calculated as the percentage of non-conforming products). 228 | | tt |
4.5 Sampling inspection can test the main technical indicators or all indicators according to the user's requirements. When the sampling test results do not meet the judgment number, the production factory should be notified to jointly re-sample and test. If it still fails, the batch will be judged as unqualified and the production factory will be responsible for handling it. 4.6DLZ-A dry paper media loss tangent tga (100℃) is not used as the basis for factory and delivery testing. 5 Marking, packaging, transportation and storage
5.1 Carry out according to QB45 "Paper Packaging and Marking", and make the following additions: 5.1.1 The end face of the roll should be neat and clean, the bow shape should not exceed 10mm, and the zigzag shape should not exceed 5mm . 5.1.2 The number of broken ends in each roll of DLZ-ADLZ-B cable paper shall not be more than 3. The number of broken ends in each roll of DLZ-C cable paper shall not exceed 4. The cutoff point should be clearly marked.
5.1.3 After wrapping each roll with a layer of plastic film or moisture-proof paper, wrap it with 3 to 4 layers of wrapping paper. Labels are affixed to both ends of the roll. 5.2. Covered and clean vehicles should be used for transportation. Paper should be kept properly and rolls should not be dropped from high places when transporting or stacking. 229
A1 instrument
A1.1 conductivity meter
GB7969-87
Appendix A
Conductivity of water extract of insulating paper and cardboard Measurement (supplement)
An instrument that can measure conductance or susceptance. The minimum reading of the instrument is 10-2ms/m, the accuracy is 5%, and the measurement frequency is 50~1000Hz. A1.2 Constant temperature water bath
A1.3 250mL hard glass or quartz Erlenmeyer flask with reflux condenser. Before use, it should be treated several times with distilled water with a conductivity less than 0.2ms/m, so that after boiling for 60 ± 5 minutes, the conductivity of the distilled water is no more than 0.2ms/m. Otherwise, take another bottle and reprocess it. A2 Reagent
A2.1 Distilled water with conductivity not greater than 0.2ms/m. Generally, distilled water can meet the requirements after being treated with ion exchange resin. Preparation of A3 specimen
A3.1 specimen shall be collected in accordance with the relevant provisions of GB450 "Methods for Collection of Average Samples of Paper and Paperboard and Treatment of Samples Before Inspection".
A3.2 Use clean tools to cut the sample into 10mm×10mm pieces and store it in a sample bottle for later use. Wear clean gloves when preparing samples to avoid contaminating the samples. When storing, it should be stored away from acid mist in a clean ground-mouthed jar with a lid. A4 Test steps and calculation results
A4.1 Weigh 5 ± 0.002g of air-dried sample, put it into a 250mL Erlenmeyer flask, and add 100mL of freshly boiled distilled water (its conductivity is not greater than 0.2ms/m) Install a reflux condenser, boil slowly on a water bath for 60 ± 5 minutes, cool in a covered Erlenmeyer flask, and adjust to 23 ± 0.5°C. Be careful to avoid breathing carbon dioxide in the air. A4.2 Then wash the conductivity cell twice with the extraction solution, pour the extraction solution into the conductivity cell, and measure the conductivity at 23 ± 0.5°C. A blank test was performed at the same time.
The conductivity of the A4.3 extract is calculated according to formula (A1) (expressed in ms/m): rate, ms/m;
G
The conductivity of the sample extraction solution, ms/m;
G, the conductivity of the blank test, ms/m.
.(Al)
Carry out two measurements at the same time, take the arithmetic mean as the measurement result, take two significant figures, and the error between the calculated values ??of the two measurements should not exceed 10%. If it exceeds, take another sample and re-measure. Additional notes:
This standard is proposed by the Ministry of Light Industry of the People's Republic of China. This standard is under the jurisdiction of the Paper Industry Research Institute of the Ministry of Light Industry. This standard is drafted by Jiamusi Paper Mill. From the date of implementation of this standard, the original Ministry of Light Industry standard QB131-79 "Power Cable Paper" is invalid. 230
GB 7969-
-87
GB/T1525-1979 "Drawing Papers" and other 23 national standards No. 1 amendment order involves: GB/T1525---1979| |tt||GB/T 1911-. -1991
GB/T 1914--1993
GB/T 2675—1981
GB/T 2676—-1981||tt ||GB/T 3147 --- 1982
GB/T 31481982
GB 7969-1987
GB 79711987
GB/T 7972-1987||tt| |GB/T 8938--1988
GB/T 1912--1989
GB/ * 10334--1989
GB/T 11541—1989
GB/ T 12654—1990
GB 1913. 1-1990
GB 1913. 2-1990
GB/T12913--1991
GB/T 13023---1991
GB/T 13024--1991
GB/T 13505---1992
GB/T 13506- --1992
GB/T 13507-1992| |tt||This revision was approved by the State Bureau of Technical Supervision in the form of Technical Supervision National Standard Letter (1997) No. 04 on January 27, 1997, and will be implemented on June 1, 1997.
Standard name (23 items)
1.GB/T 1525—I979
Drawing paper
2.GB/T1911-1991 copy paper
3. GB/T1914--.1993
Chemical analysis filter paper (Table 1)
4. GB/T 2675--1981
Map paper
5. GB /T 2676—1981
1 sea chart
6. CB/T 3147---1982
Information processing unperforated paper tape
7. GB/T 3148 .--1982
Bleached sulfite reed pulp
Indicator name
Average length and width of breaking length
Average length and width of folding resistance (reciprocating)
Average length and width
Breaking length
Tear degree
Average length and width
Breaking length
not less than
iron content|| tt||Folding endurance
Average lengthwise and horizontally
Folding endurance vertically
! Tensile strength
Folding endurance
Longitudinal
Elongation
Breaking length
Not less than
Not less than||tt ||Not less than
Not less than
Fast (101)
Medium speed (102)
Slow (103)
Not greater than||tt ||Not boy
Not less than
Not less than
Not less than
Not less than
Not less than
Unit
m
Huan
km
mN
km
%
times
times
kN/ m
times
%
m
level
A
B
A
B| |tt||A
B
C
A
B
C
Special number
No.|| tt||Original standard
20℃/65%|
modified to
23℃/50%
3500
3000
100
40
4.70
4.00
3.50
59.0
54.0
49.0
1.40| |tt||1.80
1.80
0.003
100
50
1000
7.0
100||tt ||10
3 000
3700
3200
65
25
5.00
4.30||tt| |3.70
54.00
50.0
45.0
1.50
1.90
1.90
Cancel
70
30
700
7.8
70
3200
231
Standard name (23 items)||tt ||GB7969-87
Continued table
Indicator name
8.GB7969-1987 power cable paper
Folding endurance
Average length and width||tt ||Tensile strength longitudinal
not less than
transverse
elongation
not less than
tear transverse direction
not less
9.GB7971---1987
Semi-conductive cable paper
232
Tensile strength
Longitudinal
Not less than
Elongation| |tt||not less than
tear degree
not less than
vertical
horizontal
horizontal
horizontal
Not less than
80 μm
130μm
170 μm
80μm
130μm
170μm
80 μm||tt ||130 μm
170μm
80μm
130μm
170 μm
80gm
130μm
170μm||tt ||80μm
130μm
170 μm
80 μm
130 μm
170μm
80 μm
130 μm
170 μm
80 μm
130 μm
170 μm
1BLZ
2BLZ
1BLZ
2BLZ
vertical
horizontal
1BLZ
2BLZ
unit
times
kN/m
%
mN
kN/m
%
mN
grade
and
C
A
and
B
c
A
and
B
C
A| |tt|| and
B
C
A
B
A
B
original standard|| tt||20℃/65%
1000
2000
5.90
10.5
13.0
4.90
9.50
11.8
2.90
4.90
6.50
2.60
4.20
5.90
2.0|| tt||2.2
2.2
1.9
2.0
2.0
6.0
6.5
6.5||tt| |5.7
6.0
6.0
540
1080
1470
7.80
7.20
8.50
7.80
3.60
3.90
2.0
6.0
980
1180
Modify to| |tt||23C/50%
700
1400
6.20
11.0
13.0
5.15
10.0
12.5
3.05
5.15
6.85
2.75
4.40
6.20
1.7|| tt||1.8
1.8
1.8
2.0
2.0
6.4
5.7
5.7||tt| |5.1
5.4
5.4
510
1020
1390
8.40
7.70
9.10
8.40
3.90
4.20
1.8
5.4
900
1090
standard name ( 23 items)
10. G13/T 7972—1987
Punched telegraph paper
11.GB/T8938—1988 typing paper
12.GB/T1912— 1989 dictionary paper
13. GB/* 10334—1989
telephone paper
14. GB/T 11541—1989
photographic original paper
15. GB/T 12654~--1990
Writing paper
GB 7969—87
Continuation table
Indicator name
Elongation rate||tt| |Width 9.5/12/14mm
Longitudinal
Width 17.5/22.0/25.4mm
Not greater than
Folding endurance Longitudinal
Not less than|| tt||Tensile strength longitudinal chamber
Width 9.5/12/14mm
not less than, width 17.5/22.0/25.4mm breaking length vertical and horizontal average
not less than||tt| |Tear index
Average longitudinal and transverse breaking length
Unique length ratio
Tensile strength
Not less than
Tensile strength longitudinal||tt| |Not less than
tear transverse direction
not less than
vertical direction
transverse direction
vertical direction
transverse direction
water absorption (Kebo method) 60s
Folding endurance (number of reciprocations)
The transverse direction is not less than
Unit
%
kN/m||tt| |m
not less than mN·m2/g
not less than
not less than
not less than
DH-50
DH- 75
DH-50
DH-75
140g/m
200g/m
140g/m
200g/m| |tt||45~50 g/m2bzxZ.net
60~~80 g/m2
m
%
kN/m
kN/m
mN
g/m
times
grade
original standard
modified to
120℃/65% |23℃/50%
6.0
7.0
150
3.90
4.60
A
B|| tt||c
A
B
C
A
B
C
A||tt| |B
C
A
B
C
AB
C
B
B
A
B
A
B
A
B
B
B|| tt||c
3200
2600
2500
4.3
4,0
3.4
2 500| |tt||2 500
2300
2.0
4.0
4.06
3.60
3.27
4,90
4.70
4.58
1.58
1.44
1.96
5.20
4.60
6.20|| tt||5. 90
750
700
1000
900
5.0
6.0
110|| tt||4.20
4.90
3400
2800
2700
3.85
3.55
3.00
2650
2650
2400
1.6
3.5
4.30
3.80| |tt||3.50
5.20
5.00
4.90
1.65
1.55
2.10
5.50||tt ||4.90
6.60
6.30
700
650
930
840
13. 0 ~~ 18 . 0|15, 0 ~~ 20. 0[14. 0~20. 016. 0~~22. 0
l14. 0~22. 016. 0~24. 0
12
16
6
4
9
12
5
233
standard name ( 23 items)
16. GB 1913. 1-- 1990
Unbleached gel-impregnated insulating paper
17. GB 1913. 2-- 1990
Bleached and impregnated insulation Paper
18.GB/T 12913—1991
Capacitor paper
19. GB/T 13023-1991
Corrugated base paper
20. GB/ T 13024--1991
Container Board
234
Tensile Strength
Not a Boy
Tensile Strength
Tensile Index| |tt||(Table 2)
(Table 3) Tensile index
GB 7969--87
Continued table
Indicator name
Longitudinal
Transverse
Longitudinal
Transverse
Longitudinal
Longitudinal
Transverse
Annular pressure index
No Less than
breaking length
burst index
not less than
ring pressure index transverse
not less than
vertical||tt| |JZ-60
J2-80
JZ-60
JZ-80
not less than
not less than
not less than| |tt||not less than
112 g/m2
unit
kN/m
kN/m
N·m/g||tt ||N?m*/g
127140 |Nm2/g
g/m
127140N·m2/g
g/m
km
Nothing small
200~230 g/m*
≥250 g/m2
Grade
A
B|| tt||13
Original standard
modified to
20C/65%23C/50%
3.93
4.60
1.96| |tt||2.60
2.15
1.83
1.37
1.17
B, C
A
BC| |tt||A
B
C
D
A
B
C
D||tt ||B
[
D
A
C
D
kPa·m/gl
A| |tt||B
C
D
E
IN*m/g
200~-230 g/m2
≥250 g/m2
A
A
B
D
E
70.0
55.0||tt ||78.0
60.0
6.50
5.00
3.50
3.00
7.10
5.80
4.00
3.20
8.40
7.10
5.00
3.20
4.00
3.50
2.50| |tt||2.00
2.95
2.75
2.65
1.50
1.10
0.90
8.40||tt ||9.70
8.40
6.00
5.20
4.90
4.20
4. 90
2.10||tt ||2.80
2.35
2.00
1.50
1.25
77.0
61.0
86.0
66.0
7.10
5.50
3.80
3.30
7.70
6.30
4.40
3.50| |tt||9.20
7.70
5.50
3.50
4.30
3.75
2.70
2.15||tt ||3.00
2.80
2.70
1.53
1.12
0.92
9.20
1o.6||tt ||9.20
6.50
5.70
5.30
Standard name (23 items)
20.GB/T 13024—1991
Container board
21. GB/T 13505-1992
High purity insulating wood pulp
22. GB/T 13506—1992
Bleached sulfite wood pulp| |tt||23. GB/T 13507---1992
Natural sulfite wood pulp
Folding endurance transverse direction
Tensile index
Tear index
Tensile index
Tear index
Tensile index
「Tear index
GB 7969
Continuation table||tt ||Indicator name
-87
not less than
340 g/m2
360g/m2
420g/m2
not less than
not less than
not less than
unit
times
N?m/g
mN·m2/g||tt| |N·m/g
Grade
A
B
C
C
A
A|| tt||B
B2-A
Bz-B
Bz-C
Bk-B
Bk-C
Bk -D
not less than mN·m\/g
Bz-A
Bz-B
Bz-C
Bk-B||tt ||Bk-c
Bk-D
not less than
N+m/g
AA
AB
AC|| tt||mN?m2/gl
not less than
AA
AB
AC
Original standard
modified to ||tt ||20C/65%23C/50%
80
50
18
14
10
90.0||tt| |80.0
8.50
8.00
70.0
60.0
50.0
40.0
28.0
25.0
5.50
4.50| |tt||4.00
3.50
2.50
2.50
75.0
65.0
55.0
6.00||tt ||5.00
4.00
55
35
14
12
8
97.0
85.0
8.0
7.50
74.0
64.0
53.0
42.0
30.0
27.0| |tt||5.20
4.20
3.70
3.30
2.30
2.30
80.0
70.0||tt ||60.0
5.60
4.70
3.70
235
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