This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of organic silicon glass mica tape for electrical insulation. This standard applies to mica tape with flaked mica or mica wire as the base material, organic silicon adhesive paint as the adhesive, and electrical alkali-free glass cloth as the reinforcement material on both sides. JB/T 6488.2-1992 Mica tape Organic silicon glass mica tape JB/T6488.2-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Mica Tape
Organic Silicone Glass Mica Tape
Subject Content and Scope of Application
JB6488.2—92
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of organic silicon glass mica tape for electrical insulation.
This standard applies to mica tape with flaked mica or mica paper as the base material, organic silicone adhesive paint as the adhesive, and electrical alkali-free glass cloth as the reinforcement material on both sides.
2 Reference Standards
GB5019
GB5020
3 Product Classification
Electrical Insulation Mica Products
Electrical Insulation Mica Products
Test Methods
Definition and General Requirements
This standard divides the models according to the structure of the product. The product models are shown in Table 1. Table 1
Product model
5450-1
4 Technical requirements
4.1 Appearance
Mica tape is not allowed to have foreign impurities.
Mica substrate
Residual mica
Mica paper
Scope of application
Applicable to motor and electrical insulation with a working temperature of 180℃. The mica tape can be freely wound off the reel. The adhesive should be evenly distributed, and no adhesion, delamination, peeling of mica or breaking of mica paper, drawing of glass cloth and loosening of tube core are allowed. The wrinkles of the reinforcement material are not allowed to exceed the allowable deviation of the individual thickness value. 4.2 Size
4.2.1 Thickness
See Table 2 for the nominal thickness and allowable deviation.
614 approved by the Ministry of Machinery and Electronics Industry of the People's Republic of China on August 6, 1992
1993-01-01
Product model
5450-1
4.2.2Width
Nominal thicknessbzxz.net
JB6488.2-92
Deviation between median and nominal thickness
The width of the mica tape reel is: (15±1); (20±1); (25±2); (30±2); (35±2) mm. The width and deviation of the mica tape roll can be agreed upon by the supplier and the buyer. 4.2.3Edge curvature
The edge curvature of 5450 shall not exceed 2mm.
The edge curvature of 5450-1 shall not exceed 1mm.
4.2.4 Length
Maximum deviation of individual values ​​from nominal thickness
The length of mica tape is expressed by the diameter of its roll and reel. The diameter of mica tape roll and reel is (95±5) mm or (115±5) mm, with no more than 2 joints and the shortest length is not less than 5m. 4.3 Composition
The composition of mica tape is shown in Table 3.
Product model
5450-1
4.4 Performance requirements
Mica content
The performance of mica tape shall comply with the requirements of Table 4. Table 4
Indicator name
Dielectric strength\
Tensile strength
Softness
Adhesive content
N/10mm
Note: 1) In the dielectric strength test, the measured breakdown voltage value is not allowed to exceed one in the range of (0.6～0.9) kV. 5
Test method
5.1 Appearance
Evaluate by visual observation.
5.2 Thickness
Volatile content
Agreed by both parties
According to the provisions of Chapter 1 of GB5019.
5.3 Width
JB6488.292
Measure at least three places with a ruler with a scale of 0.5 mm and report the average value. 5.4 Edge curvature
According to the provisions of Chapter 13 of GB5019.
5.5 Length
Measure the diameter of the end surface of the mica tape roll and disk with a ruler with a scale of 0.5mm. 5.6 Composition
According to the provisions of Chapter 3 of GB5019.
5.7 Dielectric strength
According to the provisions of Chapter 16 of GB5019.
5.8 Tensile strength
According to the provisions of Chapter 5 of GB5019.
5.9 Softness
According to the provisions of Chapter 12 of GB5019.
6 Inspection rules
6.1 Mica tapes produced by no more than three shifts with the same raw materials and processes are considered a batch, and each batch must be subjected to factory testing. The factory test items are the 1st and 3rd items in Table 4 of Article 4.1, Article 4.2 and Article 4.4 of this standard. 6.2 Take samples from a batch of not less than 5% of the total number of packaging tubes (bags), at least 3 tubes (bags), take one plate from each tube (bag), and check according to Articles 4.1 and 4.2 of this standard; take one plate from the same batch and check according to Articles 4.3 and 4.4 of this standard. 6.3 Others shall comply with the provisions of Chapter 2 of GB5020. 7 Marking, packaging, transportation, storage
7.1 Mica tape shall be rolled on a tube core with an inner diameter of (40±2) mm. 7.2
The storage period of mica tape is 6 months from the date of leaving the factory. 7.3 Others shall comply with the provisions of Chapter 3 of GB5020. Additional remarks:
This standard was proposed by the National Technical Committee for Standardization of Insulating Materials and is under the jurisdiction of the Guilin Electric Science Research Institute of the Ministry of Machinery and Electronics Industry. This standard was drafted by Shanghai Mica Insulation Material Factory. The main drafters of this standard are Li Yuanzhang, Xie Weimin and Han Zhengxiang.
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