This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of shaped mica sheets for electrical insulation. This standard applies to shaped mica sheets for electrical insulation, which are made of peeled mica as the base material and bonded with a suitable adhesive. They are hard plate-like materials under normal conditions and can be molded under certain temperature conditions. JB/T 7099-1993 shaped mica sheets JB/T7099-1993 standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 7099-1993
Molded Mica Sheet
Published on October 8, 1993
Ministry of Machinery Industry of the People's Republic of China
Implemented on January 1, 1994
Mechanical Industry Standard of the People's Republic of China
Subject Content and Scope of Application
JB/T7099-1993
This standard specifies the technical requirements, test methods, inspection rules, marking, packaging, transportation and storage of molded mica sheets for electrical insulation. This standard applies to molded mica sheets for electrical insulation that are made of peeled mica as the base material and bonded with a suitable adhesive. They are hard plate-like materials under normal conditions and can be molded under certain temperature conditions. 2
Cited 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 heat resistance of the products. The product models are shown in Table 1. Wrap
Product Model
Technical Requirements
Alkyd Adhesive Paint
Lac Adhesive Paint
Alkyd Adhesive Paint
Lac Adhesive PaintbzxZ.net
Organic Silicone Adhesive Paint
Applicable to various insulating tubes, rings and other parts for motors and electrical appliances with working temperature of 130CApplicable to various insulating tubes, rings and other parts for motors and electrical appliances with working temperature of 180CThe edges of the molded mica board should be neat and the adhesive should be evenly distributed. Foreign impurities, delamination and peeling of mica holes are not allowed. Size
Nominal thickness and allowable deviation are shown in Table 2.
Deviation between median value and nominal thickness
Approved by the Ministry of Machinery Industry on October 8, 1993
Maximum deviation between individual value and nominal thickness
Implemented on January 1, 1994
Length and width
JB/T7099-1993
Continued Table 2
Deviation between median value and nominal thickness
Maximum deviation between individual value and nominal thickness
The recommended length is 800~1000mm and the width is 400~600mm. The dimensions can also be supplied according to the agreed size between the supplier and the buyer. The deviation of the length and width of the mica board trimmed according to the nominal size is ±5%. 4.3
Performance requirements
The performance of the molded mica board shall comply with the requirements of Table 3. Table
Indicator Name
Adhesive Content
Dielectric Strength
0.15~0.25mm
0.30~0.50mm
0.60~1.20mm
Plasticity
Test Method
Evaluate by visual observation.
5.2 Thickness
According to the provisions of Chapter 1 of GB5019.
Length and Width
5230,5231
5235,5236
Can be plasticized into a tube at 110±5℃Can be plasticized into a tube at 130±5℃Use a ruler with a scale of 1mm to measure at least three places and report the average value. 5.4 Adhesive content
According to the provisions of Chapter 3 of GB5019.
5.5 Dielectric strength
According to the provisions of Chapter 16 of GB5019.
Plasticity
According to the provisions of Chapter 15 of GB5019.
Inspection rules
The same raw materials and processes, the continuous production of the number of plastic mica boards not exceeding 5 Cokg is a batch, each batch must be subject to factory testing, 2
JB/T7099-1993
The factory test items are the second and third items in Table 3 of Article 4.1, Article 4.2 and Article 4.3 of this standard. 6.2 Samples of not less than 5% of the total weight of each batch shall be inspected in accordance with Articles 4.1 and 4.2 of this standard, and 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
7.1 The storage period of silicone molded mica board is 4 months from the date of leaving the factory, and the storage period of other molded mica board is 6 months from the date of leaving the factory.
7.2 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. 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 Material Factory, and the main drafters of this standard were Li Yuanzhang, Xie Weimin, and Han Zhengxiang. People's Republic of China
Mechanical Industry Standard
Mica Plate
JB/T7099-1993
Published by the China Academy of Mechanical Science
Printed by the China Academy of Mechanical Science
(No. 2 Shouti South Road, Beijing
Postal Code 100044)
Words XXX,XXX
Format 880×1230
Print Sheet X/X
Edition X, XX, 19XX
Printing X, XX, 19XX
Print Quantity 1-XXX
Price XXX.XX Yuan
XX-XXX
Mechanical Industry Standard Service Network: http://www.JB.ac.cn661_6602/F
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