Summary
: Liquid milk is often used
PE
Black and white film packaging form, but this kind of packaging often has liquid milk leakage at the sealing part due to improper sealing strength. How to ensure good sealing strength to meet the sealing effect of intact packaging, need to carry out related testing. This paper is independently developed by Jinan Languang Electromechanical Technology Co., Ltd.
XLW (PC)
Intelligent electronic tensile testing machine tests the sealing strength (also known as heat sealing strength or heat sealing strength or sealing strength or sealing strength) of a brand of liquid milk black and white film packaging bags, and details the testing equipment principle, operation steps and applicable scope. It provides certain technical guidance value for controlling the heat sealing effect of liquid milk packaging bags.
Key words
: sealing strength, heat sealing strength, heat sealing strength, sealing strength, sealing strength, liquid milk, dairy products,
PE
Black and white film packaging bags, soft plastic packaging bags, intelligent electronic tensile testing machines, sealing cracks, leaks, heat sealing excessive
1
,significance
The packaging form of liquid milk is mainly divided into bag, box and bottle. The bagged liquid milk is easy to carry, the cost of the package is lower, and the barrier properties of some bag materials can meet the liquid milk. The quality requirements during the warranty period, so the bag form is favored by dairy manufacturers. The bagged liquid milk is mainly divided into two categories: the bag and the sterile pillow. The cost of the aseptic pillow is higher, so the use of the bag is more widely considered from the perspective of mass benefits. The material commonly used in the bag is black and white film and milk film. Due to the barrier property deviation of the milk film, the packaged liquid milk has a short shelf life, generally only
3-5
day. The high-barrier resin material can be added to the black and white film to extend the shelf life of the liquid milk packaged in the black and white film. Therefore, the bagged liquid milk is mainly packaged in black and white film.
Liquid milk black and white film is mainly of different models
PE
For the main resin raw materials, according to the quality of the liquid milk, it is necessary to add a barrier resin raw material, and then mix the black and white masterbatch to coextrude the coextruded film. Liquid milk
PE
The heat sealing effect of the black and white film packaging seal and the used
PE
The model number and its addition ratio, and the parameter setting of the heat sealing equipment are related. If the hot tack is good, the heat sealing temperature range is wide, and the heat sealing resistance of the inclusion is excellent.
PE
The model resin can ensure high sealing strength and good sealing performance. But in addition to guarantee
PE
In addition to the good heat sealing properties of the black and white film itself, the heat sealing temperature, pressure and time parameters of the heat sealing device are also critical to the sealing quality. If the above heat sealing parameters are too large or too small, the sealing portion of the package will appear. Quality problems such as cracking or leaking. Therefore, liquid milk should be strictly monitored.
PE
The heat sealing effect of the black and white film packaging seal, usually
"
Sealing strength
â€
Indicators are characterized, also known as
"
Heat seal strength
â€
,
"
Sealing strength
â€
,
"
Heat sealing strength
â€
The larger the general strength value, the stronger the sealing, but the larger the sealing strength value, the better. It is necessary to comprehensively determine the heat sealing effect of the sealing with the relevant experimental phenomena. This article uses fresh milk
PE
The black and white film packaging bag is taken as an example to introduce the detection method and test phenomenon of the sealing strength.
2
,status quo
The liquid milk black and white film packaging is mainly in the form of a three-side seal, that is, three sides of the four sides of the packaging bag are formed by heat sealing. For the detection of the sealing strength of this type of packaging bag, the standard currently adopted in China is
QB/T 2358-1998
"Test method for heat sealing strength of plastic film packaging bags".
Figure
1
Liquid milk
PE
Black and white film packaging
3
Test sample
a brand that is randomly purchased on the market
PE
Pure milk in black and white film packaging.
4
,equipment
This article uses
Labthink
Languang
XLW (PC)
The intelligent electronic tensile testing machine tests the sealing strength of pure milk packaging bags.
Figure
2 XLW (PC)
Intelligent electronic tensile testing machine
4.1
Test principle
The sample is clamped between the two chucks of the clamp, and the two chucks are moved relative to each other. The force value sensor and the built-in displacement sensor on the movable chuck are used to collect the force value change and displacement during the test. Change, to calculate the sealing strength, tensile, tear, deformation rate and other performance indicators of the sample.
4.2
Scope of application
(1) XLW (PC)
Intelligent electronic tensile testing machine for plastic film, composite materials, flexible packaging materials, plastic hoses, adhesives, adhesive tapes, stickers, medical patches, release papers, protective films, composite covers, metal foils, separators , magnetic card, non-woven fabric, rubber, paper and other products heat sealing, stretching, peeling, deformation, tearing, bonding, puncture force, opening force, tearing force, low speed unwinding force, drawing force, anti-stress Performance testing.
(2) XLW (PC)
Intelligent electronic tensile testing machine meets
GB 8808
,
GB/T 1040.1 ~ GB/T 1040.4
,
GB/T 1040.5
,
GB/T 4850
,
GB/T 12914
,
GB/T 17200
,
GB/T 16578.1
,
GB/T 7122
,
GB/T 2790 ~ GB/T 2792
,
GB/T 17590
,
QB/T 1130
,
QB/T 2358
,
ASTM E4
,
ASTM D882
,
ASTM D1938
,
ISO 37
,
ASTM D 3330
,
ASTM F88
,
ASTM F904
,
JIS P8113
And many other national and international standards.
4.3
Performance parameter
l
Have
500 N
,
50 N
Two sizes to choose from, test accuracy up to
0.5
Level, effectively guarantees the accuracy of the test results.
l
The device supports the pull and press bidirectional test mode. In both test modes, the test speed can be
50 mm/min
,
100 mm/min
,
150 mm/min
,
200 mm/min
,
250 mm/min
,
300 mm/min
,
500 mm/min
Any of the seven modes can be set.
l
The equipment uses a pneumatic clamp to prevent the sample from slipping.
l
1000 mm
The ultra-long stroke can be used to test the material with large deformation rate.
l
The user's operation safety is protected by intelligent configuration such as limit protection, overload protection and automatic return.
l
Configured
100
Different kinds of sample fixtures are available for users to choose.
1000
The testing requirements of the materials, and can provide customized services according to the test materials.
5
,Experimental procedure
(1)
A sampler is used to cut the sample from each heat seal of the purchased liquid milk package.
10
Article (required from the same sample
3
Measured on a different package), the width of the sample is
15 mm
, the expanded length is
100 mm
.
(2)
Test parameters such as sample width, thickness, and test speed were set in the software of the tensile tester.
(3)
The sample is unfolded and clamped on the jig so that the long axis direction of the sample coincides with the center line of the jig.
Figure
3
Sample clamping diagram
(4)
Click the Start Test button in the software and the test begins. The system automatically calculates and records the test results.
6
,test results
According to the front font of the package, the top and bottom are used as the basis for judging the upper edge, the lower edge, and the side edge.
3
Cut in a bag
10
The average heat seal strength of the upper edge seal sample is
20.044 N/15mm
,
10
The average heat seal strength of the lower edge seal sample is
19.781 N/15mm
,
10
The average heat seal strength of the side edge seal samples is
22.407 N/15mm
.
7
,in conclusion
Labthink
Languang
XLW (PC)
The intelligent electronic tensile testing machine has the advantages of accurate test results and high test efficiency in detecting the sealing strength of liquid milk black and white film packaging bags. The device can also be used to test the sealing strength of soft plastic materials such as liquid milk aseptic pillows, aseptic bricks and milk white films, and also to test the peel strength, tensile strength and deformation rate, puncture resistance of various soft plastic packagings, Performance such as tearing force is a versatile and cost-effective instrument. In addition to the sealing strength, liquid milk packaging should also pay attention to its oxygen permeability, friction coefficient, sealing performance and other indicators, related testing equipment.
Labthink
Languang can provide you with detailed information about the instrument.
View call
0531-85068566
advisory.
Labthink
Languang is looking forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry.
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