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Kelii bopp tape wholesale

1 Scope
This standard applies to the determination of a roll without separating layer of pressure-sensitive bopp tape unwound low intensity.
2 Definitions
2.1 unwound - roll of bopp tape along the radial peeled off bopp tape, bopp tape so that the back of the outer and inner surfaces of sticky tape substrate stripping process occurs.
2.2 deconvolution strength - under certain test conditions, so that the load per unit width needs to be applied when a roll of bopp tape unwound with mN / cm or gf / cm representation.
Principle 3
The simulation method by hand or machine, in order to unlock the low roll of bopp tape. The solution roll holder fixed to the lower holder of the testing machine, unwinding the central axis of the clamp sleeve has a sample. When sandwiching the sample holder on the starting end of a predetermined rate move, with the axis of rotation of the sample solution volume, this time, the recorder automatically records the test machine unwinding load.
4 Instrument,
4.1 tensile testing machine
4.1.1 The testing machine should give priority to non-inertial electronic tensile testing machine, mechanical tensile testing machine can also be used.
4.1.2 Mechanical tensile testing machine used should be consistent with JB 706-77 requirements for qualification testing machine "mechanical tensile testing machine technical conditions."
4.1.8 tester clamper rate of 300 ± 30mm / min, together with the load of the automatic recording apparatus.
4.2 unwound jig
Unwound by the clamp shaft, frame, tapered collet, whose structure with reference to FIG. The shaft with a tapered collet generating rotational force should be less than 20gf (0.2N).
Note: The test method of rotational force is unwound jig Figure 1 assembled and hung up with a small piece of bopp tape is fixed to one end of a hair shaft in the middle, and then put it in a few laps winding shaft close to a heavy weights 20g hanging of hair at the other end, if weight can drive axis that is consistent with the requirements.
Figure 1 Solution roll holder
Measuring 4.3
Measuring the use of minimum scale in line with GB 1214-75 "caliper" requirement is not greater than 0.05mm vernier caliper.
5 Sample
Sample width is not more than 80mm, no obvious deformation and damage.
6 Test Conditions
6.1 Test chamber temperature of 23 ± 2 ℃, relative humidity of 65 ± 5%.
6.2 Sample packing material should be removed, and do not overlap placed 2h under 6.1 above conditions.
7 Test Procedure
7.1 on the sample taken three substantially equal partially measure the width, the arithmetic mean for the width of the specimen.
7.2 remove the outermost layer of the sample 3-5 ring tape.
7.3 The unwinding shaft clamp bracket fixed in the holder under the tester, the sample was set on the shaft and tighten the chuck cone from both sides, so that the central axis of the sample holder and then its loaded into the creel.
7.4 peeled by hand from the sample of about 200mm long tape, which was secured in the starting end of the holder.
7.5 start testing machine to 300 ± 30mm / min at a rate of about 300mm long untied bopp tape, shut down after the cut has been undone bopp tape.
7.6 test five times by 7.4 to 7.5. Testing should be carefully observed and recorded sample anomalies generated during unwinding.
8 test results
In the range of 8.1 2, after removal of the initial portion of the curve AB on the record, in the remainder of the range of not less than 10 sequentially reads the data aliquot, the arithmetic mean of sample H the unwinding load. Unwinding strength is calculated as follows:
Where: J- deconvolution strength, mN / cm (gf / cm);
H- unwound load, mN (gf):
b- sample width, cm.
Figure 2 unwrapping profiling
8.2 Test results including a maximum of five tests deconvolution strength, minimum and the arithmetic mean of the test results shall be rounded to the nearest whole number.
9 Test report
Test report includes the following content
a. The measured bopp tape types, models;
b, production units;
c. Production date, sample date, test date;
d. Test Conditions;
e. Sample width;
f. Test Results;
8. Test observations;
h. Other content to be reported.

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