This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of flexible mica sheets for electrical insulation. JB/T 7100-1993 Flexible mica sheets JB/T7100-1993 Standard download decompression password: www.bzxz.net

Subject content and scope of application
Machinery Industry Standard of the People's Republic of China
(Mica Board
JB/T7100-93
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of soft mica boards for electrical insulation. This standard applies to soft mica boards for electrical insulation that are made of peeled mica or mica paper as the base material, with or without reinforcing materials, and bonded with suitable adhesives and are flexible under normal conditions. Reference Standards
GB5019
Electrical Insulation Mica Products
GB5020
3 Product classification
Electrical insulation mica products
Test methods
Definition and general requirements
This standard divides the models according to the heat resistance and structure of the products. The product models are shown in Table 1. Table 1
Product models
5130-1
5131-1
5136-1
5151-1
Reinforcement materials
Paper for double-sided mica tape
Double-sided alkali-free glass cloth for electrical usewwW.bzxz.Net
Single-sided or double-sided alkali-free glass cloth for electrical use
Paper for double-sided mica tape
Double-sided alkali-free glass cloth for electrical use Glass cloth
Double-sided mica tape paper
Double-sided non-glass glass cloth for electrical use
4 Technical requirements
4.1 Appearance
Adhesive
Alkyd adhesive paint
Silicone adhesive paint
Alkyd adhesive paint
Epoxy adhesive paint
Silicone adhesive paint
Applicable to motor slot insulation and gasket insulation with working temperature of 130CApplicable to motor plant insulation and gasket insulation with working temperature of 180CApplicable to motor slot insulation and gasket insulation with working temperature of 130CApplicable to motor slot insulation and gasket insulation with working temperature of 180CSoft mica The board should have neat edges and evenly distributed adhesive. No foreign impurities, delamination, mica paper breakage and mica peeling holes are allowed.
4.2 Dimensions
4.2.1 Thickness
Nominal thickness and allowable deviation are shown in Table 2.
Approved by the Ministry of Machinery Industry on October 8, 1993
Implemented on January 1, 1994
Product model
5130-1
5131-1
5136-1
5151-1
Nominal thickness
0.20;0.25
0. 30; 0. 40; 0.50
0.20; 0.25
0. 30;0. 40; 0. 50
: Length and width
JB/T7100-93
Deviation between median value and nominal thickness
Maximum deviation between individual value and nominal thickness
Width is 400~1200mm, and can also be supplied according to the agreed size between the supply and demand parties. The recommended length is 600~1200mm,
The deviation of length and width of mica board trimmed according to the nominal size is 5%. 4.3
Performance requirements
The performance of the soft mica board shall comply with the provisions of Table 3. Table 3
Indicator name
Volatile content
Adhesive content
Mica content
Dielectric strength
Softness
Test method
Evaluate by visual observation.
5130-1
≥The following corresponding values
No delamination, peeling, sliding, breaking and falling of mica shall be carried out in accordance with the provisions of Chapter 1 of GB5019.
5.3 Length and width
Measure at least three places with a ruler with a scale of 1mm and report the average value. 5.4 Volatile content
Carry out in accordance with the provisions of Chapter 3 of GB5019.
5.5 Adhesive content
According to the provisions of Chapter 3 of GB5019.
5131-1
5136-1
5.6 Mica content
According to the provisions of Chapter 3 of GB5019.
5.7 Dielectric strength
According to the provisions of Chapter 16 of GB5019.
Softness
According to the provisions of Chapter 12 of GB5019.
Inspection rules
JB/T7100-93
6.1 The same raw materials and processes, the continuous production of soft mica boards not exceeding 500kg is a batch, each batch must be subjected to factory testing. The factory test items are 4.1, 4.2 and 4.3 of this standard, Table 3, Items 4 and 5. 6.2 Each batch of samples shall not be less than 5% of the total weight and shall be inspected in accordance with Articles 4.1 and 4.2 of this standard. The other tests shall be sampled on the same board. 6.3 Others shall comply with the provisions of Chapter 2 of GB5020. 7 Marking, packaging, transportation, storage
The storage period of soft mica board is 3 months from the date of leaving the factory. 7.1
Others shall comply with the provisions of Chapter 3 of GB5020. 7.2
Additional remarks:
This standard was proposed by the National Technical Committee for Standardization of Insulating Materials. This standard is under the jurisdiction of the Guilin Electric Science Research Institute of the Ministry of Machinery Industry. This standard was drafted by Shanghai Mica Insulating Materials Factory. The main drafters of this standard are Li Yuanzhang, Xie Weimin and Han Zhengyang. 33
People's Republic of China
Machine board industry standard
Electrical materials
JB/T7091~7100-93
Machinery Standardization Research Institute of the Ministry of Machinery Industry
Edited and published by the Standardization Research Office of the First Equipment Department of the Ministry of Machinery Industry
(No. 302, Xiashesi Street, Xiangtan City, Hunan Province)
Printed by the Printing Plant of Xiangtan Electric Motor Factory
Format 880×12301/16 Printing sheet 23% Number of words 68000 First edition in November 1994
First printing in November 1994
Printing number DB803
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.