GB/T 4616-1984
Replaced
GB/T 39818-2021
Active
National standards
GB/T 39818-2021 Plastics—Thermosetting moulding materials—Determination of shrinkage
GB/T 39818-2021 Plastics—Thermosetting moulding materials—Determination of shrinkage
Price:
$ 42
Basic Information
Standard Code:
GB/T 39818-2021
Standard Type:
National standards
Standard Status:
Active
is_force_gb:
no
CCS Name:
Basic standards and general methods for synthetic resins and plastics
ICS Name:
Thermosetting plastics
Publish Date:
2021-03-09
Implement Date:
2021-10-01
Pages:
5 pages
Scope
This standard specifies a method for measuring the molding shrinkage and post-heat treatment shrinkage of samples of thermoset molding materials. These characteristics are useful for production control and testing the production uniformity of thermoset materials. Additionally, understanding the initial shrinkage of thermoset materials is important for mold design, and understanding post-heat treatment shrinkage is crucial for determining whether the molding materials are suitable for manufacturing precision-sized molded parts. This standard applies to thermoset molding materials.
Development Information
Referenced Standards
Adopt standards
ISO 2577:2007
Related Standards
GB/T 4617-1984
Replaced
GB/T 4617-1984 Phenolic mouldings—Determination of acetone-soluble matter
GB/T 5471-1985
Replaced
GB/T 5471-1985 Preparation method for compression moulding of specimens of thermosetting moulding materials
GB/T 5472-1985
abolished_transferred
GB/T 5472-1985 Test method for rectangular flow cure properties of thermosetting moulding compounds
GB/T 5473-1985
Replaced
GB/T 5473-1985 Phenol-formaldehyde mouldings—Detection of free ammonia
GB/T 5474-1985
Replaced