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GB/T 1303.13-2026Industrial rigid laminated sheets based on thermosetting resins for electrical purposes — Part 13: Rigid laminated sheets based on benzoxazine resin (English PDF)

电气用热固性树脂工业硬质层压板　第13部分：苯并噁嗪树脂硬质层压板

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 1303.13-2026 is the English-translated version of 电气用热固性树脂工业硬质层压板　第13部分：苯并噁嗪树脂硬质层压板.

GB/T 1303.13-2026 is the Chinese standard "Industrial rigid laminated sheets based on thermosetting resins for electrical purposes — Part 13: Rigid laminated sheets based on benzoxazine resin".

Its scope clause reads: This document specifies the naming, requirements, and procedures for rigid electrical laminates (hereinafter referred to as "laminates") using benzoxazine resin as a binder.

The supply requirements describe the corresponding test methods. This document applies to rigid benzoxazine resin laminates made by hot pressing with glass cloth as the substrate and benzoxazine resin as the adhesive. Design, production, sales and inspection. Its clauses include naming.

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Document preview — GB/T 1303.13-2026

National Standard of the People's Republic of China

ICS: 29.035.99
Classification: K 15

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Preface
Introduction
1.Scope
2 Normative References
3.Terms and Definitions
4.Naming
5 Requirements
5.1 Appearance
5.2 Dimensions
5.4 Performance Requirements
6.Test Methods
6.1 General Provisions
6.2 Appearance
6.3 Dimensions
6.4 Straightness
6.5 Bending strength
6.6 Impact strength of parallel layers into a simply supported beam
6.7 Impact strength of parallel layers towards a cantilever beam
6.8 Apparent flexural modulus of elasticity
6.9 Vertical compressive strength
6.10 Parallel layer shear strength
6.11 Tensile Strength
6.12 Adhesive strength
6.13 Vertical layer-to-layer electrical strength
6.14 Parallel Layer Breakdown Voltage
6.15 Dielectric loss factor and dielectric constant at 1MHz
6.16 Insulation resistance after immersion in water
6.17 Tracking Resistance Index (PTI)
6.19 Density
6.20 Flammability
6.21 Water Absorption
7.Labeling and Shipping

1 Scope

This document specifies the naming, requirements, and procedures for rigid electrical laminates (hereinafter referred to as "laminates") using benzoxazine resin as a binder.

The supply requirements describe the corresponding test methods.

This document applies to rigid benzoxazine resin laminates made by hot pressing with glass cloth as the substrate and benzoxazine resin as the adhesive.

Design, production, sales and inspection.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 1303.1-2009 Thermosetting resin industrial rigid laminates for electrical applications – Part 1.Definitions, classification and general requirements

GB/T 1303.9-2009 Industrial rigid laminates made of thermosetting resins for electrical applications - Part 9.Rigid laminates made of polyimide resins

GB/T 1408.1-2016 Electrical strength test methods for insulating materials – Part 1.Tests at power frequency

IEC 60893-2.2023 Insulation materials - Thermosetting resins for electrical applications - Industrial rigid laminates - Part 2.Test methods

Part 2.Methods of the best)

This document does not contain any terms or definitions that need to be defined.

4 Naming

4.1

The laminates mentioned in this document are named according to the resin and reinforcing materials used and the characteristics of the laminates. The naming structure is as follows.

---This document is numbered GB/T 1303.13;

---The abbreviation for benzoxazine resin (BOZ);

---GC stands for (textile) glass cloth reinforcement material;

---Serial number.

Example. BOZGC301 type industrial rigid laminate, named. GB/T 1303.13-BOZGC301.

4.2

The laminate models are shown in Table 1.

Table 1.Models of Benzoazine Resin Industrial Rigid Laminates

Model, application, and characteristics a

BOZGC301 is for mechanical and electrical applications. It exhibits good mechanical and electrical properties at high temperatures.

BOZGC302 is for mechanical and electrical applications. It exhibits good mechanical and electrical properties at high temperatures and has good flame retardancy.

a. This table should not be used to conclude that a particular type of laminate is necessarily unsuitable for applications not listed, or that a specific laminate is necessarily suitable for applications not listed.

It describes a wide range of uses.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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