This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of alkyd glass mica tape for electrical insulation. JB/T 6488.1-1992 Mica tape Alkyd glass mica tape JB/T6488.1-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Mica Tape
Alkyd Glass Mica Tape
Subject Content and Scope of Application
JB 6488.192
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of alkyd glass mica tape for electrical insulation.
This standard applies to mica tape with flaked mica as the base material, alkyd adhesive paint as the adhesive, and electrical alkali-free glass cloth and mica tape paper as the reinforcement materials on both sides.
Reference Standards
GB5019 Electrical Insulation Mica Products
GB5020 Electrical Insulation Mica Products
Product Classification
Test Method
Definition and General Requirements
This standard divides the models according to the heat resistance of the products. The product models are shown in Table 1. Table 1
Product model
Technical requirements
4.1 Appearance
Mica tape is not allowed to have foreign impurities.
Adhesive
Alkyd adhesive
Scope of use
Applicable to motor and electrical insulation with a working temperature of 130℃. The mica tape can be wound freely from the reel. The adhesive should be evenly distributed, and no adhesion, delamination, flaking of mica, glass cloth pulling and loose 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
The nominal thickness and allowable deviation are shown in Table 2.
Nominal thickness
Deviation between median value and nominal thickness
4.2.2 Width
Approved by the Ministry of Machinery and Electronics Industry on August 6, 1992 ±0. 02
Maximum deviation between individual value and nominal thickness
Implemented on January 1, 1993
JB6488.1-92
The width of mica tape reel is: 15±1; 20±1; 25±2; 30±2; 35±2mm. The width and deviation of mica tape roll can be agreed by both the supplier and the buyer. 4.2.3 Edge curvature
The edge curvature of mica tape shall not exceed 2mm. 4.2.4 Length
The length of mica tape is expressed by the diameter of its roll and reel. The diameter of the mica tape roll and disk is 95±5mm or 115±5.mm, with no more than 2 joints and the shortest length of not less than 5m. 4.3 Composition
The composition of the mica tape is shown in Table 3.
Mica content
Performance requirements
The performance of the mica tape shall comply with the provisions of Table 4. No.
Indicator name
Dielectric strength\
Tensile strength
Softness
Adhesive content
N/10mm
1) In the dielectric strength test, no more than one of the measured breakdown voltage values ​​between 0.6 and 0.9kV is allowed. Note:
Test method
5.1 Appearance
Evaluate by visual observation.
5.2Thickness
According to the provisions of Chapter 1 of GB5019.
5.3Width
Use a ruler with a scale of 0.5mm to measure at least three places and report the average value. 5.4Edge curvature
According to the provisions of Chapter 13 of GB5019.
5.5Length
Use a ruler with a scale of 0.5mm to measure the end diameter of the mica tape roll and disk. 5.6Composition
According to the provisions of Chapter 3 of GB5019.
5.7Dielectric strength
According to the provisions of Chapter 16 of GB5019.
5.8Tensile strength
According to the provisions of Chapter 5 of GB5019.
5.9Softness
According to the provisions of Chapter 12 of GB5019.
Volatile content
Indicator value
Agreed by both parties
6 Inspection rules
JB6488.1-92bZxz.net
6.1 Mica tapes produced by no more than three shifts with the same raw materials and process are considered a batch, and each batch must be tested before delivery. The test items before delivery are Items 1 and 3 in Table 4 of Article 4.1, 4.2 and 4.4 of this standard. 6.2 Take samples from no less than 5% of the total number of packaging tubes (bags) in a batch, with a minimum of 3 tubes (bags), and take one reel from each reel (bag) for inspection according to Articles 4.1 and 4.2 of this standard; take one reel from the same batch for inspection 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 should be rolled on a tube core with an inner diameter of 40±2mm. 7.2 The storage period of mica tape is 6 months from the date of leaving the factory. 7.3 Others should 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 Insulating Materials Factory. The main drafters of this standard are Li Yuanzhang, Xie Weimin, and Han Zhengxiang. 51
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