How to detect the physical properties of BOPP color synthetic paper?

Testing the physical properties of BOPP color synthetic paper requires a series of professional testing methods and instruments. The following are some main test items and their corresponding test methods and standards:

1. Thickness detection

Detection method:

Using high-precision thickness gauges, such as Labthink's CHY-C2A thickness gauge, the resolution can reach 0.1μm.

Cut about 50mm wide splines along the lateral side of the sample to ensure that the splines are free of wrinkles and other defects.

Measure multiple points uniformly within the effective width range of the film (such as measuring one point every 8mm), and pay attention to the control of the deviation, generally controlled within 3%.

In addition to measuring the vertical and horizontal thickness, it is also necessary to measure the edge thickness of the film.

2. Density detection

Detection method:

Can be tested according to DIN 53420.

The density value of the sample is measured by a densitometer or related instrument.

3. Tensile strength and elongation at break detection

Detection method:

Use electronic tensile testing machines, such as Labthink Languang's XLW(PC) intelligent electronic tensile testing machine.

Transverse and longitudinal specimens are taken and tensile tests are performed according to standard methods (e.g. ASTM D 882).

The data of tensile strength and elongation at break are recorded. Generally, the longitudinal tensile strength is greater than 140N/mm² and the transverse tensile strength is greater than 220N/mm². The elongation at break is controlled below 200% longitudinally and below 80% laterally.

4. Gloss and fog detection

Detection method:

Glossiness can be measured using a 45 degree Angle glossometer according to ASTM D 2457.

The fog level is measured using a fog meter according to ASTM D 1003.

Intercept the sample of appropriate size to ensure that the surface of the sample is smooth and flat, without dirt, scratches and other defects.

5. Thermal shrinkage detection

Detection method:

Test according to GB/T 13519 or ASTM D2732.

Using a heat shrink tester (such as the RSY-R2 heat shrink tester of Labthink LAN Light), the sample is quickly immersed in a constant temperature medium to shrink freely, and then the size change is measured.

Pay attention to the consistency of control test conditions (such as temperature, time, etc.) to ensure the comparability of data.

6. Friction coefficient detection

Detection method:

Test according to GB 10006 standard.

The coefficient of static and dynamic friction between the film and different materials (such as metals, cartons, etc.) is measured using a friction coefficient tester (such as Labthink's MXD-02 friction coefficient tester).

The test speed can be set according to the standard or actual requirements (such as 100mm/min or 150mm/min).

7. Surface tension detection

Detection method:

Prepare a series of test mixes according to international GB/T14216-93 or other relevant standards.

The test mixture was evenly coated on the surface of the sample with fat cotton and tweezers, and the surface tension was judged by observing the changes in the state of the liquid film.

The specific operation can refer to the relevant testing procedures or standards.

8. Other testing items

In addition to the above main testing items, according to actual needs, it may also involve the detection of various physical performance indicators such as temperature resistance, cooking resistance, oil resistance, water vapor permeability, oxygen permeability, etc. These testing projects usually require the use of professional testing instruments and methods, and follow the corresponding national or industry standards.

To sum up, the detection of the physical performance indicators of BOPP color synthetic paper requires the use of a variety of professional test methods and instruments, and follow the relevant national or industry standards to ensure the accuracy and comparability of data.