Summary
: The coefficient of friction of the packaging film is an important performance, which will have a great impact on the process of unwinding, opening and bag cutting of the package. This article takes the rice cake packaging film as an example, and uses the research and development independently developed by Jinan Languang Electromechanical Technology Co., Ltd.
MXD-02
The friction coefficient meter verifies the friction coefficient, and introduces the testing principle of the equipment, the parameters of the equipment, the applicable scope of the equipment and the brief test procedure, which provides an effective test method for the enterprise to detect the friction coefficient of the packaging film.
Key words
: friction coefficient, dynamic friction coefficient, static friction coefficient, smoothness, soft plastic packaging, rice cake, pastry, slippery, poor opening
1
,significance
The friction coefficient is a physical quantity that characterizes the smoothness of packaging materials. It is divided into dynamic friction coefficient and static friction coefficient. It is an important detection index for packaging materials. The size of the friction coefficient is directly related to whether the packaging process can proceed smoothly. If the friction coefficient of the package is too small or uneven, it may cause the packaged film to slip or run off during the roll-to-roll bag, or the stack may be unstable and produce a wrong edge; if the friction coefficient is too large, the package roll film may easily occur. When the volume is not smooth, or when the contents are filled, the opening of the bag is poor. Therefore, a suitable coefficient of friction is of great significance for the improvement of production efficiency.
Rice cake is a traditional food in Southeast Asia. It is mainly made from sticky rice or rice flour and yellow rice. It is a time-honored food in the Lunar New Year. It has two colors, white and yellow, which symbolizes gold and silver.
"
Annual high
â€
Harmony, meaning that people's lives are getting better and better. In this paper, the friction coefficient of the outer surface of the inner surface of the rice cake packaging film is detected by simulating the friction process of the packaging material itself when the film is drawn.
2
,status quo
Most of the rice cakes are packaged in plastic composite film. At present, the domestic reference method for the friction coefficient of soft plastic packaging is mainly
GB 10006-1988
"Method for Measuring Friction Coefficient of Plastic Film and Sheet".
3
Sample
A plastic composite film roll film for a brand of rice cake packaging.
4
,Testing Equipment
This article adopts
Labthink
Languang
MXD-02
The friction coefficient meter tests the coefficient of friction of the rice cake packaging film sample.
4.1
Test principle
The coefficient of friction refers to the ratio of the friction between two surfaces in contact with each other and the vertical pressure acting on one of the surfaces. The device is designed according to this principle. The device applies vertical pressure to the two films through a slider of known mass, and tests the friction values ​​of the two films from relatively stationary to relative sliding, thereby obtaining a static friction coefficient and a dynamic friction coefficient between the two contact faces.
4.2
Scope of application
(1)
This equipment is specially used to measure plastic film and sheet, aluminum foil, aluminum-plastic composite film, metal material composite tape for communication cable, metal products, rubber, paper, cardboard, woven bag, textile, non-woven fabric, conveyor belt, wood, The static friction coefficient and dynamic friction coefficient of coatings, brake pads, wipers, shoe materials, tires and other materials can also be used for the smoothness test of cosmetics, eye drops and other daily chemicals.
(2)
This equipment meets a number of national and international standards, such as
ISO 8295
,
GB 10006
,
ASTM D1894
,
TAPPI T816
Wait.
4.3
Device parameters
l
Equipment load range is
0 ~ 5 N
, the test accuracy is
0.5
level.
l
Equipment travel is divided into
70 mm
,
150 mm
Two options are available.
l
The quality of the device standard slider is
200 g
Other quality sliders can be customized according to the needs of users or related standards.
l
The test speed of the equipment is
100 mm/min
or
150 mm/min
Other test speeds can be adjusted as needed.
l
The dynamic and static friction coefficient of the sample can be measured simultaneously in one test.
l
The test bench and test slide of the equipment are demagnetized and residual magnetic detection, which effectively reduces the test error of the system.
l
The professional software can automatically perform statistical analysis of the results of single-piece and group tests, reanalysis of raw data, and superposition of group curves. Various reporting modes show the test results to customers intuitively and quickly.
l
stand by
Lystem TM
Laboratory data sharing system, unified management test report and test results.
5
,Experimental procedure
(1)
Cutting from the surface of the sample roll film
8 cm × 20 cm
,
63 mm × 100 mm
Samples of each
3
Film, forming
3
Group test samples.
(2)
Take one of them
8 cm × 20 cm
The sample, with the hot cover facing up, is attached or fixed to the horizontal test bench.
(3)
Take one of them
63 mm × 100 mm
The sample piece is fixed on the slider, and the non-heat cover is facing outward, that is, the hot cover is in direct contact with the slider.
(4)
The slider to which the sample is fixed is placed on the surface of the sample to be attached to the horizontal test bench without impact, and the test system is ensured to be free from force, and the pulling direction of the sample is parallel to the sliding direction. The test surface of the two specimens cannot be touched by hand during the whole process of cutting and loading, and the test surface of the specimen is free from fingerprints, dust and the like.
(5)
Set parameter information such as test speed and test stroke, click the test option, and the test starts.
(6)
Two samples are still
15 s
After that, the relative movement begins. The device automatically records the change in force value during the test to calculate the static friction coefficient and dynamic friction coefficient of the sample.
(7)
Repeat steps
(2) ~ (6)
Until
3
The test of the group sample is completed.
6
,test results
3
The test results of the group samples are shown in the table.
1
Shown.
table
1
Test result data sheet
7
,in conclusion
Friction coefficient is an important performance index of soft plastic packaging.
MXD-02
The friction coefficient meter tests the friction coefficient of the rice cake packaging film, the test result is stable, the data is reliable, and can truly reflect the smoothness of the packaging material. In addition to the rice cake packaging film,
MXD-02
The friction coefficient meter can be used for testing the friction coefficient of various packaging and products such as sheet, paper and printed matter. It is an extremely wide range of testing equipment.
Labthink
Languang has been committed to providing professional testing services and equipment to customers around the world, focusing on solving difficult problems in packaging for customers, and learning more.
Labthink
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View device specific information or call directly
0531-85068566
advisory. Jinan Languang Electromechanical Technology Co., Ltd. is willing to enhance technical exchanges and cooperation with enterprises and institutions in the industry.
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