GB/T 4550-2026 Preparation of fiber reinforced plastic plates for test purposes English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 4550-2026
Preparation of fiber reinforced plastic plates for test purposes
试验用纤维增强塑料平板的制备
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Summary of Methods
5 Equipment
6 Auxiliary Process Materials
7 Preparation Process
8 Inspection
Preparation of fibre reinforced plastic plates for test purposes
1 Scope
This document specifies the summary of methods, equipment, auxiliary process materials, preparation process, inspection and preparation report for the preparation of fibre reinforced plastic plates for test purposes.
This document is applicable to the preparation of fibre reinforced plastic plates for test purposes using the winding-compression moulding method, winding-autoclave method, lay-up-compression moulding method and lay-up-autoclave method.
2 Normative References
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1446, General principles for test methods of properties of fibre reinforced plastics
GB/T 3961, Fibre reinforced plastics terminology
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 3961 apply.
4 Summary of Methods
4.1 Winding-Compression Moulding Method
Resin-impregnated fibres are continuously wound around a mandrel to the required number of layers. The wound layers are heated and pressurised using a press, and after curing and demoulding, two test plates are obtained at one time. The recommended dimensions of each test plate are 270 mm × 270 mm.
4.2 Winding-Autoclave Method
Resin-impregnated fibres are continuously wound around a mandrel to the required number of layers. The resin-impregnated fibres and various typical auxiliary process materials are assembled to form a vacuum bag system. The wound layers are heated and pressurised using an autoclave, and after curing and demoulding, two test plates are obtained at one time. The recommended dimensions of each test plate are 270 mm × 270 mm.
4.3 Lay-Up-Compression Moulding Method
A specified number of prepreg plies are laid up on a flat plate mould to the required number of layers. The laid-up plies are heated and pressurised using a press, and after curing and demoulding, a test plate is obtained. The recommended dimensions of the plate are 270 mm × 270 mm.
4.4 Lay-Up-Autoclave Method
A specified number of prepreg plies are laid up on a flat plate mould to the required number of layers. The specified number of prepreg plies and various auxiliary process materials are assembled to form a vacuum bag system. The laid-up plies are heated and pressurised using an autoclave, and after curing and demoulding, a test plate is obtained. The recommended dimensions of the plate are 400 mm × 400 mm. The combination of typical vacuum bag system and various auxiliary process materials is shown in Figure 1.
5 Equipment
5.1 Winding Equipment
5.1.1 Winding machine
Composed of a creel, tension control device, glue bath and circumferential winding drive mechanism (the glue bath is not required for dry winding).
5.1.2 Creel
Used for placing fibre yarn packages. It can be arranged vertically or horizontally. A certain braking force shall be applied to the yarn package shaft to prevent the yarn package from loosening.
5.1.3 Tension control device
Mechanical friction or electromagnetic force methods may be used. The tension shall remain stable throughout the winding process. It should be 2 % to 4 % of the ultimate strength of the fibre.
5.1.4 Glue bath
Shall be equipped with a constant temperature device. It mainly consists of an inlet fibre guide, squeeze rollers, impregnation rollers and yarn guide rollers. A schematic diagram is shown in Figure 2.
5.1.5 Drive mechanism
Enables the fibre to be uniformly and parallelly distributed over the surface of the mandrel, with a rotational speed of 0 r/min to 30 r/min.
5.2 Curing Equipment
5.2.1 Oven or press
Shall be equipped with a temperature control device capable of meeting the curing requirements, with a temperature control accuracy of ±3 °C.
5.2.2 Autoclave
The autoclave shall meet the following requirements:
a) It shall have a temperature control system capable of meeting the curing requirements, with a temperature control capability of not less than 200 °C and a temperature control accuracy of ±3 °C;
b) It shall have a pressure control system capable of meeting the curing requirements, with a pressure control capability of not less than 0.7 MPa and a pressure control accuracy of ±0.02 MPa.
5.3 Moulds
5.3.1 Moulds for winding-compression moulding method and winding-autoclave method
The winding mould consists of a mandrel and two pressure plates (upper and lower). The dimensions and precision requirements of the mould are shown in Figure 3.
5.3.2 Moulds for lay-up-compression moulding method and lay-up-autoclave method
The mould for prepreg lay-up consists of a flat plate mould and two pressure plates (upper and lower). It is recommended to adopt the form and precision of the winding mould.
5.4 Vacuum System
The vacuum system shall achieve a relative vacuum pressure of less than -94 kPa within the vacuum bag.
6 Auxiliary Process Materials
6.1 Vacuum bag
Use nylon film or polyimide film with a thickness of 0.05 mm.
6.2 Breather material
Use coarse glass fabric or synthetic fibre felt.
6.3 Metal upper pressure plate
Use an aluminium plate with a thickness of 1.5 mm to 2.0 mm and a side length of 400 mm × 400 mm; uniformly distribute 200 to 250 holes per square metre on the plate, with a hole diameter not greater than 2 mm.
6.4 Perforated release film
Use perforated polytetrafluoroethylene (PTFE) glass fabric or perforated non-stick plastic film.
6.5 Bleeder material
Use glass fabric, filter paper or bleeder felt with a thickness of 0.1 mm to 0.2 mm.
6.6 Release film and release agent
Standard
GB/T 4550-2026 Preparation of fiber reinforced plastic plates for test purposes (English)
Standard No.
GB/T 4550-2026
Status
to be valid
Language
English
File Format
PDF
Word Count
8500 words
Translation Price(USD)
255.0
Implemented on
2026-12-1
Delivery
via email in 1~3 business day
Detail of GB/T 4550-2026
Standard No.
GB/T 4550-2026
English Name
Preparation of fiber reinforced plastic plates for test purposes
GB/T 4550-2026 Preparation of fiber reinforced plastic plates for test purposes English, Anglais, Englisch, Inglés, えいご
This is a draft translation for reference among interesting stakeholders. The finalized translation (passing through draft translation, self-check, revision and verification) will be delivered upon being ordered.
ICS
CCS
National Standard of the People's Republic of China
GB/T 4550-2026
Preparation of fiber reinforced plastic plates for test purposes
试验用纤维增强塑料平板的制备
Issue date: 2026-01-28 Implementation date: 2027-02-01
Issued by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
the Standardization Administration of the People's Republic of China
Contents
Foreword
1 Scope
2 Normative References
3 Terms and Definitions
4 Summary of Methods
5 Equipment
6 Auxiliary Process Materials
7 Preparation Process
8 Inspection
Preparation of fibre reinforced plastic plates for test purposes
1 Scope
This document specifies the summary of methods, equipment, auxiliary process materials, preparation process, inspection and preparation report for the preparation of fibre reinforced plastic plates for test purposes.
This document is applicable to the preparation of fibre reinforced plastic plates for test purposes using the winding-compression moulding method, winding-autoclave method, lay-up-compression moulding method and lay-up-autoclave method.
2 Normative References
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition (including any amendments) applies.
GB/T 1446, General principles for test methods of properties of fibre reinforced plastics
GB/T 3961, Fibre reinforced plastics terminology
3 Terms and Definitions
For the purposes of this document, the terms and definitions given in GB/T 3961 apply.
4 Summary of Methods
4.1 Winding-Compression Moulding Method
Resin-impregnated fibres are continuously wound around a mandrel to the required number of layers. The wound layers are heated and pressurised using a press, and after curing and demoulding, two test plates are obtained at one time. The recommended dimensions of each test plate are 270 mm × 270 mm.
4.2 Winding-Autoclave Method
Resin-impregnated fibres are continuously wound around a mandrel to the required number of layers. The resin-impregnated fibres and various typical auxiliary process materials are assembled to form a vacuum bag system. The wound layers are heated and pressurised using an autoclave, and after curing and demoulding, two test plates are obtained at one time. The recommended dimensions of each test plate are 270 mm × 270 mm.
4.3 Lay-Up-Compression Moulding Method
A specified number of prepreg plies are laid up on a flat plate mould to the required number of layers. The laid-up plies are heated and pressurised using a press, and after curing and demoulding, a test plate is obtained. The recommended dimensions of the plate are 270 mm × 270 mm.
4.4 Lay-Up-Autoclave Method
A specified number of prepreg plies are laid up on a flat plate mould to the required number of layers. The specified number of prepreg plies and various auxiliary process materials are assembled to form a vacuum bag system. The laid-up plies are heated and pressurised using an autoclave, and after curing and demoulding, a test plate is obtained. The recommended dimensions of the plate are 400 mm × 400 mm. The combination of typical vacuum bag system and various auxiliary process materials is shown in Figure 1.
5 Equipment
5.1 Winding Equipment
5.1.1 Winding machine
Composed of a creel, tension control device, glue bath and circumferential winding drive mechanism (the glue bath is not required for dry winding).
5.1.2 Creel
Used for placing fibre yarn packages. It can be arranged vertically or horizontally. A certain braking force shall be applied to the yarn package shaft to prevent the yarn package from loosening.
5.1.3 Tension control device
Mechanical friction or electromagnetic force methods may be used. The tension shall remain stable throughout the winding process. It should be 2 % to 4 % of the ultimate strength of the fibre.
5.1.4 Glue bath
Shall be equipped with a constant temperature device. It mainly consists of an inlet fibre guide, squeeze rollers, impregnation rollers and yarn guide rollers. A schematic diagram is shown in Figure 2.
5.1.5 Drive mechanism
Enables the fibre to be uniformly and parallelly distributed over the surface of the mandrel, with a rotational speed of 0 r/min to 30 r/min.
5.2 Curing Equipment
5.2.1 Oven or press
Shall be equipped with a temperature control device capable of meeting the curing requirements, with a temperature control accuracy of ±3 °C.
5.2.2 Autoclave
The autoclave shall meet the following requirements:
a) It shall have a temperature control system capable of meeting the curing requirements, with a temperature control capability of not less than 200 °C and a temperature control accuracy of ±3 °C;
b) It shall have a pressure control system capable of meeting the curing requirements, with a pressure control capability of not less than 0.7 MPa and a pressure control accuracy of ±0.02 MPa.
5.3 Moulds
5.3.1 Moulds for winding-compression moulding method and winding-autoclave method
The winding mould consists of a mandrel and two pressure plates (upper and lower). The dimensions and precision requirements of the mould are shown in Figure 3.
5.3.2 Moulds for lay-up-compression moulding method and lay-up-autoclave method
The mould for prepreg lay-up consists of a flat plate mould and two pressure plates (upper and lower). It is recommended to adopt the form and precision of the winding mould.
5.4 Vacuum System
The vacuum system shall achieve a relative vacuum pressure of less than -94 kPa within the vacuum bag.
6 Auxiliary Process Materials
6.1 Vacuum bag
Use nylon film or polyimide film with a thickness of 0.05 mm.
6.2 Breather material
Use coarse glass fabric or synthetic fibre felt.
6.3 Metal upper pressure plate
Use an aluminium plate with a thickness of 1.5 mm to 2.0 mm and a side length of 400 mm × 400 mm; uniformly distribute 200 to 250 holes per square metre on the plate, with a hole diameter not greater than 2 mm.
6.4 Perforated release film
Use perforated polytetrafluoroethylene (PTFE) glass fabric or perforated non-stick plastic film.
6.5 Bleeder material
Use glass fabric, filter paper or bleeder felt with a thickness of 0.1 mm to 0.2 mm.
6.6 Release film and release agent
