GB/T 34445-2017Test method of hot-tack property for heat sealing surfaces of thermoplastic polymer and thermoplastic composite material (English PDF)
热塑性塑料及其复合材料热封面热粘性能测定
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Issued by
SAMR; SAC
Level / Type
National · Recommended
Issue date
September 29, 2017
Implementation date
April 1, 2018
Scope
GB/T 34445-2017 is the English-translated version of 热塑性塑料及其复合材料热封面热粘性能测定.
GB/T 34445-2017 is the Chinese standard "Test method of hot-tack property for heat sealing surfaces of thermoplastic polymer and thermoplastic composite material".
Its scope clause reads: This standard specifies the terms and definitions, principles and methods of thermosensitive properties of thermoplastics and their composite materials, Sample, sample conditioning, equipment, test procedures, test results, test reports.
This standard applies to flexible thermoplastics and their composites, from the end of the heat seal to the heat sealing part has not yet cooled to ambient temperature Timing interval, under different heat sealing conditions of the hot tack test. Its clauses include terms and definitions.
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Document preview — GB/T 34445-2017
National Standard of the People's Republic of China
- ICS
- 83.080.20
- Classification
- G 31
Issued by: State Administration for Market Regulation; Standardization Administration of the PRC
Contents
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 3.1 Sealing layer surface separation adhesivefailure
- 3.2 Failure mode
- 3.3 Melting through burnthrough
- 3.4 Cohesive destruction of
- 3.5 Cooling curve
- 3.6 Cooling time
1 Scope
This standard specifies the terms and definitions, principles and methods of thermosensitive properties of thermoplastics and their composite materials,
Sample, sample conditioning, equipment, test procedures, test results, test reports.
This standard applies to flexible thermoplastics and their composites, from the end of the heat seal to the heat sealing part has not yet cooled to ambient temperature
Timing interval, under different heat sealing conditions of the hot tack test.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version applies to this article
Pieces. For undated references, the latest edition (including all amendments) applies to this document.
GB/T 2918-1998 plastic sample conditioning and testing of the standard environment
3 Terms and definitions
The following terms and definitions apply to this document.
3.1 Sealing layer surface separation adhesivefailure
Separation behavior occurring at the heat seal interface.
3.2 Failure mode
During the hot-stick test, the heat-seal sample is disconnected when the chuck is separated, as shown in FIG. 1.
3.3 Melting through burnthrough
Hot seal at the weld piercing and thermal deformation of the state.
Note. When this occurs at the heat seal, the heat seal temperature is too high or the heat seal time is too long.
3.4 Cohesive destruction of
One or both sides of the heat-sealed sample are destroyed at a point approximately parallel to the heat seal interface while the heat seal interface maintains a complete failure mode.
Note. The damage mode is shown in Figure 1. When adhesive materials are involved in heat-sealing, a similar term can be defined when similar damage occurs.
3.5 Cooling curve
In the heat sealing process just after the end of the thermal viscosity with the cooling time curve, shown in Figure 2.
Note that the cooling curve is the curve of the hot tack on the cooling time, and the most practical part of the cooling curve is the first 1 s after the heat sealing knife is opened.
3.6 Cooling time
The time between the point at which the heat seal knife is separated and the time point at which the hot tack is measured.
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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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