Plastic composite film tensile force test

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Plastic composite film tensile force test

Plastic composite film tensile force test

The plastic composite film in this test refers to the plastic and plastic composite film and composite bag for food and non-food packaging made by dry lamination and extrusion lamination.

1. Standard environment for testing

Temperature: (23±2)℃

Relative humidity: (50±10)%

2. Plastic composite film tensile force test sample

2.1 Sampling: Sufficient samples to complete the test shall be taken from the undamaged packaging. When sampling on the film roll, the surface three layers shall be removed and a sufficient number of samples shall be cut along the width of the film roll.

2.2 The size of the sample for breaking force: the length of the sample is 150mm, and the width of the sample is 15mm

2.3 Breaking force test speed of plastic film and plastic bag: 200mm/min

3. Test equipment

Electronic tensile testing machine, digital display electronic tensile testing machine (as shown in Figure 1) or computer-controlled electronic tensile testing machine (as shown in Figure 2)

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Figure 1: Digital Display Electronic Tensile Testing Machine

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Figure 2: Microcomputer-controlled electronic tensile testing machine

The technical parameters of the digital display electronic tensile testing machine are as follows:

No	Item	Specification
1	Frame	Single column, LCD display
2	Force capacity	100N,200N,500N,1000N,2000N,5000N
3	Operating menu	English
4	Force measuring range	2%-100%FS
5	Accuracy grade	Grade 1
6	Error of test force	Less than ±1% of set value
7	Resolution of test force	0.1N
8	Resolution of displacement	0.01mm
9	Error of deformation value	Less than ±1%
10	Display item	Test force, displacement, peak value, test state, test speed
13	Motor power	0.75KW
14	Crossbeam speed	0.1-500mm/min
15	Crossbeam stroke	800mm(Space can according to clients)
16	Tensile space	650mm(Space can according to clients)
17	Compress space	650mm(Space can according to clients)
18	Dimension	520x480x1550mm
23	Voltage	220V,50Hz
24	Weight	80kg

The technical parameters of the microcomputer-controlled electronic tensile testing machine are as follows:

No	Item	Specification
1	Force capacity	100N,200N,500N,1000N,2000N,5000N
2	Force measuring range	0.4%-100%FS
3	Error of force value	Less than ±1% of set value
4	Resolution of test force	1/500000
5	Displacement resolution	0.0025mm
6	Accuracy of elongation measuring	±0.5%
7	Crossbeam speed range	0.05-500mm/min
8	Precision of displacement speed control	±1%(0.01-10mm/min); ±0.5%(10-500mm/min)
9	Accuracy of constant force, constant displacement, displacement elongation control	When set value is less than 10%FS，error is less than ±1.0% of set value When set value is more than 10%FS，error is less than ±0.1% of set value
10	Accuracy of deformation control	When set value is less than 0.05%FS，error is less than ±2.0% of set value When set value is more than 0.05%FS，error is less than ±0.5% of set value
11	Distance between tensile grips	650mm
12	Voltage	Single phase,220V±10%,50Hz
13	Dimension	520x480x1550mm
14	Weight	80kg

4. Test steps

4.1 Measure the length, width and thickness of the specimen using suitable measuring tools. Measure 50mm in the middle of the sample and make marks at both ends.

4.2 Open the testing machine and control watch box (digital display electronic tensile testing machine) or computer testing software (microcomputer-controlled electronic tensile testing machine).

4.3 Clamp one end of the sample firmly on the grip of the tensile testing machine

4.4 Adjust the beam distance and clamp the other end of the sample firmly

4.5 Create a new tensile test, input sample size, test time, test person, etc.

4.6 Zero test force, displacement or deformation

4.7 Click to start the test to perform the tensile force test

4.8 Record the test data after the sample is broken, such as tensile force, elongation, etc.

4.9 The test results can be printed if the printer is configured

5. Breaking force and nominal strain requirements of plastic films and bags

Item		BOPP/ex PE-LD (Ordinary grade)	BOPP/dr PE-LD (Ordinary grade)	PA/dr CPP PET/dr CPP （boiled grade）	PA/dr CPP PET/dr CPP （Semi-high temperature cooking grade）	PA/dr CPP PET/dr CPP （High temperature cooking grade）
Breaking force（N）	Vertical/ horizontal	≥20	≥30	≥40
Nominal strain at break (%)	Vertical	50-180		≥35
	Horizontal	15-90		≥35