This standard specifies the model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of mica foil for electrical insulation. This standard applies to mica foil with flaked mica paper as the base material, suitable adhesive paint as the adhesive, single-sided, double-sided or multi-layer adhesive reinforcement material, plasticity at a certain temperature, and the B-stage adhesive contained in it can be finally cured after application. JB/T 901-1995 Mica foil JB/T901-1995 Standard download decompression password: www.bzxz.net

Machinery Industry Standard of the People's Republic of China
JB/T901-1995
Mica Foil
Published on November 24, 1995
Ministry of Machinery Industry of the People's Republic of China
Implementation on June 1, 1996
Mechanical Industry Standard of the People's Republic of China
Subject Content and Applicable Scope
JB/T901-1995
Replaces JB901-74
JB148974
This standard specifies the model, technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of mica boxes for electrical insulation.
This standard applies to mica foil with flaked mica or mica paper as the base material, suitable adhesive paint as the adhesive, single-sided, double-sided or multi-layer adhesive reinforcement material, which has plasticity at a certain temperature and can be finally cured after the B-stage adhesive contained in it is applied. Reference standards
GB5019
GB5020
Product classification
Electrical insulation mica products
Electrical insulation mica products
Test methods
Definition and general requirements
This standard divides the models according to the composition structure and heat resistance of the products. The product models are shown in Table 1. Table 1
Product model
5834-1
5836-1
5841-1
5842-1
5843-1
5851-1
Reinforcement materials
Alkali-free glass cloth and polyester film for electrical use
Alkali-free glass cloth for electrical use
Alkali-free glass cloth and polyimide film for electrical useAlkali-free glass cloth and polyester film for electrical use
Alkali-free glass cloth for electrical use
Polyester film
Alkali-free glass cloth for electrical use
Technical parts
Adhesive||t t||Epoxy adhesive paint
Phenolic epoxy adhesive paint or epoxy
Epoxy diphenyl ether adhesive paint
Organic silicone adhesive paint
Diphenyl ether adhesive paint
Application range
Applicable to the rolled insulation and parts of motors and electrical appliances with a working temperature of 130°C
Applicable to the rolled insulation and parts of motors and electrical appliances with a working temperature of 155°C
Applicable to the rolled insulation and parts of motors and electrical appliances with a working temperature of 180°C
The surface of the mica box should be flat, the adhesive should be evenly distributed, the edges should be neat, and foreign impurities and stratification are not allowed. 4.2 Dimensions
4.2.1 Thickness
The nominal thickness and allowable deviation of mica box are shown in Table 2. Approved by the Ministry of Machinery Industry on November 24, 1995
Implementation on June 1, 1996
5834-1
5836-1
5840-1
5841-1
5842-1
5843-1
5851-1
Length and width
JB/T901-1995
Nominal thickness
0.17; 0. 20
0.20;0.25
0.17; 0.20
0.11; 0.15
0.17; 0.20
0.25; 0.30
0. 10 ;0. 15
0.20;0.25
Deviation of individual value from nominal thicknessbzxz.net
The recommended length of mica box is 500mm~1200mm, and the recommended width is
300～1000. It can also be supplied according to the agreed size between the supplier and the buyer.
The deviation of length and width of mica foil trimmed according to the nominal size is ±5%. 4.3
Performance requirements
The performance of mica foil shall comply with the requirements of Table 3. Table
Indicator name
Volatile matter content
Adhesive content
Mica content
Average value
Individual value
Plasticity
Long-term heat resistance
Temperature index
Test method
5834-1
Evaluation by visual observation.
≥ 30
≥ 34
5836-1
5840-1,
5841~1
≥ 45
5842-1
5843-1
Treat at 110±5℃ for 15min to make a plastic tube≥130
According to the provisions of Chapter 1 of GB5019.
Length and width
Measure at least three places with a ruler with a scale of 1mm and report the average value.
Treat at 130±5℃ for 15min to make a plastic tube
Volatile matter content
According to the provisions of Chapter 3 of GB5019.
Adhesive content
According to GB5019
5Mica content
According to the provisions of Chapter 3 of GB5019.
Dielectric strength
According to the provisions of Chapter 16 of GB5019.
Plasticity
According to the provisions of Chapter 15 of GB5019.
Temperature index
JB/T 901 -1995
According to the provisions of GB11026.1, the judgment standard of the end of life shall be agreed upon by the supply and demand parties. Inspection rules
Mica foil with the same raw materials and process and a continuous production quantity not exceeding 500kg is a batch. Each batch shall be subject to factory test, and the factory test items are the 4th and 5th items in Table 3 of Articles 4.1, 4.2 and 4.3 of this standard. 6.2
Select no less than 5% of the total number of sheets in a batch for inspection according to Article 4.1 and Article 4.2 of this standard, and the inspection of other items shall be taken on the same box. 6.3 The temperature index in Item 6 of Table 3 of Article 4.3 is the product finalization test item. 6.4 Other items shall comply with the provisions of Chapter 2 of GB5020. 7
Marking, packaging, transportation, storage
The storage period of mica boxes is three months from the date of leaving the factory. Other items shall comply with the provisions of Chapter 3 of GB5020. 7.2
Additional remarks:
This standard is proposed and managed by the National Technical Committee for Standardization of Insulating Materials. This standard is drafted by Shanghai Mica Insulating Materials Factory. The main drafters of this standard are: Li Yuanzhang, Yang Lihua, Gu Haigen, and Zhu Chaying. People's Republic of China
Mechanical Industry Standard
Mica Foil
JB/T901-1995
Published and issued by the Mechanical Science Research Institute
Printed by the Mechanical Science Research Institute
(No. 2 Shouti South Road, Beijing
Format 880×1230
Edition X in xX month, 19XX
Printing 1-XXX
Postal Code 100044)
Print Sheet X/X
Number of Words xXXx,xXX
Printing X in XX month, 19XX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cnS661 - 106 /8F
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