GB/T 17037.2-2020 in English

VALID

Plastics—Injection moulding of test specimens of thermoplastic materials—Part 2:Small tensile bars

Issued on:2020-12-14
Implemented on:2021-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $120.00
$117.00

Standard No:	GB/T 17037.2-2020
Document status:	VALID
Title in English:	Plastics—Injection moulding of test specimens of thermoplastic materials—Part 2:Small tensile bars
Title in Chinese:	塑料热塑性塑料材料注塑试样的制备第2部分：小拉伸试样
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-12-14
Implemented on:	2021-07-01
ICS Classification:	83.080.20-Thermoplastic materials
Chinese Classification:	G31-Basic standards and general methods for synthetic resin and plastic
Professional Classification:	GB-National Standard
Related Keywords:	small tensile specimens plastics injection moulding injection rate injection time injection pressure suggestions
Related Topics:	plastic extension gb plastic Plastic Tensile Testing Machine Plastic Tensile Testing Machine Thermoplastic brittleness test extended plastic calorific value of plastic How to distinguish various plastics? How to prepare samples for Raman testing Cross section material sample preparation Material transmission sample preparation Which material is used for injection molding small magnetic material Plastic sample preparation equipment Thermogravimetric test sample preparation Material sample preparation equipment Thermoplastic brittleness test tiny plastic Plastic test sample Plastic Analysis Equipment plastic material thermoplastic injection molding small preparation How about the plastic performance test sample Naphthalene in injection molding materials Plastic Standard Test Strips plastic jar How to prepare samples for thermogravimetric testing thermoplastic material plastic sampling box Xiao La tiny plastic plastic sample box What kind of material testing equipment Engineering plastic tensile test GB/T 17037.2 GB/T 17037.2-2020 plastic material Tensile specimen sample Small tensile test specimen size Flat tensile specimen of rubber material What are the injection molding material standards? American Standard Stretch Sample Preparation Plastic thermogravimetric testing Regulations for Injection Molding Materials

《GB/T 17037.2-2020塑料热塑性塑料材料注塑试样的制备第2部分：小拉伸试样》由TC15（全国塑料标准化技术委员会）归口，TC15SC4（全国塑料标准化技术委员会通用方法和产品分会）执行，主管部门为中国石油和化学工业联合会。

Introduction

Interpretation of the core content of the standard

This standard specifies the technical requirements for preparing small tensile specimens of thermoplastics using C-type GB/ISO molds. The specimen size is ≥60mm×10mm×3mm (corresponding to CW13 type specimen in GB/T37426-2019).

Key technical requirements

Elements	GB/T 17037.2 requirements	Comparison with international standards
Mold type	Four-cavity double T-type runner	Consistent with ISO294-2:2018
Specimen thickness	3.0mm±0.2mm	Tolerance increase compared to ISO standard
Clamping force calculation	F_M≥5500×p_max×10^-3	Supplement the specific calculation formula

Key points of injection molding process control

The standard specifically points out: When using a C-type mold, the injection rate should be twice that of an A-type mold (maintaining the same injection time). This is because:

The cross-sectional area of the runner is only 9mm² (40mm² for A-type)
Prevent the melt from cooling too quickly in the runner
Avoid abnormal fluctuations in injection pressure

Suggestions for the implementation of the standard

During mold acceptance, it is necessary to focus on checking the cavity depth (3.0-3.2mm) and shoulder radius (15-16mm)
It is recommended to establish an injection time-rate comparison table, such as 80mm/s rate corresponds to 0.5s injection time
The sample preparation report should include 6 mandatory information: standard number, material brand, process parameters, etc.

Technology evolution analysis

The main differences between this part and the 2018 version of the ISO standard are:

GB/T17037.1-2019 is quoted to replace ISO294-1:2017
The application example of the clamping force calculation formula is added
The correlation between injection rate and runner structure is strengthened

More samples: JJG 21-2008 DL/T 5154-2012 QC/T 942-2021

Sample only — not a preview of GB/T 17037.2-2020

Loading PDF document...

Error loading PDF. Please make sure the file is valid and try again.

We also recommend

GB/T 2412-2008 in English

Plastics - Polypropylene(PP)and propylene copolymer thermoplastics- Determination of isotactic index
2008-06-19
GB/T 15597.2-2024 in English

Plastics—Poly(methyl methacrylate)(PMMA)moulding and extrusion materials—Part 2:Preparation of test specimens and determination of properties
2024-06-29
GB/T 7139-2023 in English

Plastics—Vinyl chloride homopolymers and copolymers—Determination of chlorine content
2023-08-06
GB/T 21461.1-2023 in English

Plastics—Ultra-high-molecular-weight polyethylene (PE-UHMW) moulding and extrusion materials—Part 1: Designation system and basis for specifications
2023-11-27
GB/T 34691.1-2018 in English

Plastics—Thermoplastic polyester(TP) moulding and extrusion materials—Part 1:Designation system and basis for specifications
2018-12-28
GB/T 1842-2008 in English

Plastics - Test method for environmental stress-cracking of polyethylene
2008-08-01
GB/T 35513.1-2017 in English

Plastics—Polycarbonate (PC) moulding and extrusion materials—Part 1: Designation system and basis for specifications
2017-12-29
GB/T 41758.1-2022 in English

Plastics―Polyketone (PK) moulding and extrusion materials―Part 1:Designation system and basis for specifications
2022-11-08
GB/T 25277-2010 in English

Plastics - Determination of phenolic antioxidants and erucamide slip additives in polypropylene homopolymer formulations - liquid chromatography (LC)
2010-09-26
GB/T 30924.2-2014 in English

Plastics—Ethylene-vinyl acetate(EVAC) moulding and extrusion materials—Part 2:Preparation of test specimens and determination of properties
2014-07-08