This standard specifies the model, requirements and test methods, inspection rules, marking, packaging, transportation and storage of powdered mica tape for fire-resistant safety cables (hereinafter referred to as fire-resistant mica tape). This standard applies to soft mica tape reinforced with alkali-free glass fiber cloth and bonded with powdered mica paper with organic silicone adhesive. This product is used as a fire-resistant insulation layer for cables to ensure that the cables can continue to operate within a certain period of time after a fire. JB/T 6488.5-1999 Mica tape Powdered mica tape for fire-resistant safety cables JB/T6488.5-1999 Standard download decompression password: www.bzxz.net

JB/T6488.5-1999
This standard is formulated based on the International Electrotechnical Commission IEC60371--3-8 (Edition 1995) Mica Insulation Materials, Part 3: Specifications for Individual Materials, Part 8: Powdered Mica Tapes for Fire-Resistant Safety Cables and the actual situation of domestic products. This standard is not equivalent to the IEC60371-38:1995 standard. This standard is one of the mica tape series standards, which include the following standards: JB/T6488.1-1992
Mica Tape Alkyd Glass Mica Tape
JB/T6488.2-1992
Mica Tape Organic Silicon Glass Powder Mica TapeWww.bzxZ.net
JB/T6488.3-1992
Mica Tape. Epoxy glass powder mica tape
JB/T6488.4—1995
5 Mica tape Epoxy glass powder mica tape for vacuum pressure impregnation JB/T6488.5—1999
Mica tape Powder mica tape for fire-resistant safety cable Compared with IEC60371—3—8, this standard has the following main differences: 1) The naming and models of this standard are compiled according to my country's JB/T21971996. There are four types in IEC60371-3-8, but this standard only uses two types, namely 8.1.XX glass cloth reinforced burnt muscovite powder tape, and 8.2XX glass cloth reinforced non-burnt muscovite and phlogopite powder tape:
2) IEC60371-3-8 uses single-sided reinforced powder mica tape, and double-sided glass cloth reinforced powder mica tape is added according to the domestic product situation;
3) Thickness specification This standard only uses 4 common specifications of 0.08, 0.11, 0.14, 0.18mm, and the allowable deviation is slightly enlarged according to the domestic product situation. In addition, in the composition structure, only the glass cloth content is expressed in grams/square centimeter. The mica content and resin content are expressed in percentage, and the chapter on the requirements for raw materials is omitted: 4) The length of the mica tape This standard uses the reel diameter instead of the actual length. The number of joints per roll is slightly looser than that of IEC603713-8;
5) IEC60371-3-8 stipulates that the maximum supply width is 1000mm. Since the glass cloth used in my country is 900mm wide, the maximum supply width is set at 860mm. And the allowable deviation of the width below 500mm is also slightly larger;6) The power frequency dielectric strength and volume resistivity are added to the technical indicators. The tensile strength index is reduced from 80N/10mm to 60N/10mm for single-sided reinforcement according to the domestic glass cloth and actual product conditions, and the relevant indicators for double-sided reinforcement are added;7) Appendix A (the appendix of the suggestion) is cancelled and put into the reference standard. This standard is proposed and managed by the National Technical Committee for Standardization of Insulating Materials. The drafting unit of this standard: Hengyang Insulating Materials General Factory. The drafter of this standard: Zhou Junyin.
This standard is published for the first time.
This standard is entrusted to the National Technical Committee for Standardization of Insulating Materials for interpretation. 56
JB/T6488.5-1999
·IEC Foreword
1IEC (International Electrotechnical Commission) is a worldwide standardization organization composed of all national electrotechnical committees (IEC National Committees). The goal of IEC is to promote international cooperation on all standardization issues in the electrical and electronic fields. To this end, in addition to other activities, IEC also publishes international standards. The work of formulating international standards is entrusted to technical committees, and any IEC National Committee interested in the content of the standards concerned can participate in the standard-making work. International organizations (official or unofficial) that maintain contact with the official C can also participate in the relevant work. IEC and the International Organization for Standardization (ISO) work closely together under the conditions determined by the agreement between the two organizations. 2IEC Technical Committees are composed of all National Committees that are particularly concerned about technical issues. The formal resolutions or agreements of IEC on technical issues formulated by the Technical Committee express the international majority opinion on the content of the standards involved as much as possible. 3 These technical resolutions or agreements are published in the form of standards, technical reports or guidelines for international recommendation and are accepted by the National Committees in this sense.
4 In order to promote international unification, IEC National Committees undertake to apply IEC International Standards to their national and regional standards to the greatest extent possible. Any differences between IEC standards and corresponding national or regional standards should be clearly indicated in the national or regional standards.
5IEC does not provide a marking program to indicate its approval and is not responsible for any equipment claiming to conform to IEC standards. International Standard IEC 60371-3-8 was prepared by Technical Committee 15C (Specifications) of IEC Technical Committee 15 (Insulating Materials).
The original text of this standard is based on the following standard: Draft International Standard (DIS)
15C/475/DIS
Voting Report
15C/529/RVD
Full information on the vote to approve this standard can be found in the voting report indicated in the table above. Annex A is for information only.
1 Scope
Mechanical Industry Standard of the People's Republic of China
Mica Tape
Powdered Mica Tape for Fire-resistant Security Cables
Micatapes
Mica paper tepes for flame-resistant security cables JB/T6488.5-1999
neqIEC60371-3-8:1995
This standard specifies the model, requirements and test methods, inspection rules, marking, packaging, transportation and storage of powdered mica tape for fire-resistant security cables (hereinafter referred to as fire-resistant mica tape). This standard applies to soft mica tape reinforced with alkali-free glass fiber cloth and bonded with powdered mica paper with organic silicone adhesive. This product is used as the fire-resistant insulation layer of the cable to ensure that the cable can continue to operate within a certain period of time after the fire. 2
Cited Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. At the time of publication, the versions shown are valid. All standards are subject to revision, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB/T5019--1985
GB/T5020—1985
Test methods for electrical insulating mica products (neqIEC60371-2:1973) Definitions and general requirements for electrical insulating mica products (neqIEC60371-1:1973) GB12666.61990 Test methods for burning wires and cables Part 6: Test methods for fire resistance characteristics of wires and cables (neqIEC60331-1:1970)
3 Product models
The product models divided by this standard according to the type of powdered mica paper used in the product and the different forms of glass cloth reinforcement are shown in Table 1. Table 1
5460—1D
5460—1S
546]-ID
5461-1S
54613D
5461-3S
Mica paper type
Burned white mica paper
Burned white mica paper
Non-satin burned white mica paper||tt| |Non-tender-burned muscovite paper
Non-tough-burned phlogopite paper
Non-moving-burned phlogopite paper
Note: D in the table indicates single-sided reinforcement, and S indicates double-sided reinforcement 4 Requirements
4.1 Appearance
Reinforcement form
4.1.1 The materials of the refractory mica tape should be evenly bonded, without defects such as bubbles, pinholes, wrinkles, and mica paper breaks. JB/T6488.5--1999
4.1.2 The refractory mica tape supplied in rolls should be able to be unwound continuously without causing the glass cloth to draw out and the tape reel to loosen. 4.1.3 The refractory mica tape should have the softness required by the wrapping process under normal conditions. 4.1.4 Unless otherwise specified in the purchase contract, the reel of the refractory mica tape with single-sided reinforcement should have the mica paper facing outward. 4,2 Dimensions
4.2.1 Thickness
The thickness and allowable deviation of refractory mica tape shall comply with the provisions of Table 2. Table 2
Nominal thickness
Note: Other thicknesses can be produced by negotiation between the supplier and the buyer4.2.2 Width
Median deviation
Allowable deviation
Individual value deviation
This standard does not specify requirements for the width of refractory mica tape. However, the preferred widths are: 6, 8, 10, 12, 15, 20, 25, 30, 40, 50mm.
For special requirements, the maximum supply width is 860mm as agreed by the supplier and the buyer. The allowable deviation of the width of the mica tape is shown in Table 3. Table 3
≥20<500
4.2.3 Length
The length of the fire-resistant mica tape is expressed by the reel diameter and the number of joints. Allowable deviation
The common reel diameter is 150±5mm~200±5mm. The number of reels with joints should be limited to less than 25%, and each reel should have no more than two joints. The minimum length of the joint section should not be less than 80m.
Special requirements shall be agreed upon by the supply and demand parties.
4.2.4 Edge curvature
The edge curvature of the fire-resistant mica tape shall not exceed 1mm. 4.2.5 Core diameter
The diameter of the reel core of the fire-resistant mica tape is preferably 40±2mm, 50±2mm or 76±2mm, which can also be agreed upon by the supply and demand parties.
4.3 Composition
The composition of the fire-resistant mica tape shall comply with the provisions of Table 4. Product model
5460-1D
5460—1S
5461-1D
54611S
5461—3D
5461-3S
Glass cloth specification
20 ±2
2×(20±2)
18 ±2
20 ± 2
2×（20±2)
20 ±2
2×（20±2)
Note: Other quantitative glass cloth combinations are allowed. Performance requirements
JB/T6488.5-1999
Adhesive content
The mechanical and dielectric properties of fire-resistant mica tapes shall comply with the requirements of Table 5. Table 5
4.5. Fire-resistant properties
Tensile strength
Dielectric strength
(under normal conditions)
Volume resistivity
(under normal conditions)
N/10mm
Mica tape
Reinforcement form
Single-sided reinforcement
Double-sided reinforcement
Single-sided and double-sided reinforcement
Single-sided reinforcement
Double-sided reinforcement
Single-sided and double-sided reinforcement
Volatile content
According to the contract regulations
≥1.0×1010
When the fire-resistant mica tape is used for the correctly designed fire-resistant cable, it can pass the Class A or Class B fire resistance test requirements specified in GB/T12666.6.5
Test method
Appearance: Evaluate by visual inspection.
Thickness: According to the provisions of Chapter 1 of GB/T5019-1985. Width: Measure with a ruler with a scale value of 0.5mm, measure at least 3 places, and report the average value. Reel diameter: Measure the diameter of the end face of the mica tape reel with a ruler with a scale value of 0.5mm. Edge curvature: According to the provisions of Chapter 13 of GB/T5019-1985. Composition: According to the provisions of Chapter 3 of GB/T5019-1985. Tensile strength: According to the provisions of Chapter 5 of GB/T5019-1985. Stiffness: According to the provisions of Chapter 7 of GB/T5019-1985. 5.9
Power frequency dielectric strength: According to the provisions of Chapter 16 of GB/T5019-1985, the sample is the sample before curing. 5.10
Volume resistivity: According to the provisions of Chapter 18 of GB/T5019-1985, the sample is the sample before curing. JB/T6488.51999
5.11 Fire resistance: According to the provisions of GB/T12666.6. 6 Inspection rules
6.1 The same raw materials and production process, continuous production of no more than 1000kg of fire-resistant mica tape is a batch, and each batch of products should have the same performance. The product shall be subjected to factory test and type test. The factory test items are 4.1, 4.2, 4.3 and 4.4 Table 5 1 and 3 of this standard. Fire resistance is a product identification item or inspection is only carried out when arbitration is required. 6.2 Factory inspection shall be carried out by batch sampling, sampling from no less than 5% of the total packaging tubes (bags) in a batch, with a minimum of 3 tubes (bags). Take 1 disk from each tube (bag) and check according to 4.1 and 4.2. Samples for other items are taken on the same disk. 6.3 Other items shall comply with the provisions of Chapter 2 of GB/T5020-1985. 7 Marking, packaging, transportation, purchase and storage
The storage period of fire-resistant mica tape at room temperature is half a year from the date of leaving the factory. 7.2 Other items shall comply with the provisions of Chapter 3 of GB/T5020-1985:
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