Abstract : The barrier properties and physico-mechanical properties of liquid milk Tetra Pak pillows will be directly affected by the composite fastness of Tetra Pillows. If the softness of the Tetra Pak pillows is poor, it will directly cause laminating of the lamination of the composite film, leading to packaging The decrease in performance causes the product to have a packaging quality safety problem. In this paper, Labthink 's self-developed XLW(EC) intelligent electronic tensile testing machine is used to test the peel force of liquid milk flexo pillow packs to verify the composite fastness of the Troll pillow packs. At the same time, the details of the test process and test principles, equipment parameters, etc., for the company to test the composite material fastness provide reference.
Keywords: Dairy products, liquid milk, Tetra Pak, paper aluminum-plastic composite film, plastic composite film, composite fastness, peel force, peel strength, electronic tensile testing machine
1 , the meaning
Liquid milk contains a lot of fats and proteins, and it is prone to oxidative deterioration. It needs to be packed with packaging materials with high barrier properties to ensure that liquid milk will not be affected by oxygen or other substances in the external environment and that it will undergo mildew, bulge and other deterioration. . The packaging of liquid milk is mainly bagged, boxed and bottled. The bags are mainly made of white film, black and white film, aseptic pillow (Leroy pillow) and other materials.
The Tetra Pillow is a paper aluminum-plastic composite film packaged from polyethylene, paper, aluminum foil and other materials. Due to the addition of a metal foil, it has high barrier properties. The liquid milk nipple pillow package can satisfy 45-90 days. Shelf life. The composite fastness between the layers of the Tetra Pillow is an important factor influencing the overall barrier and physical mechanical strength of the Tetra Pak. The composite fastness can be expressed by the peeling force or the peeling strength. If the composite fastness between the layers is poor, the composite film can easily be stratified. This leads to a decrease in the barrier property of the composite film and a serious decrease in the physical and mechanical strength, which can easily result in the quality and safety of the finished product packaging. The problem, therefore, companies should strictly monitor the peel force or peel strength between layers to ensure the composite fastness.
2 , test standards
At present, the domestic standards for the peel strength or peel strength of composite films for packaging are mainly GB 8808-88 “Test methods for peeling of soft composite plastic materialsâ€.
3 , test sample
A brand pure milk Lele pillow wrapping film.
4 , test equipment
This article uses Labthink 's independent research and development of the XLW (EC) intelligent electronic tensile testing machine to test the sample peel force and peel strength.
4.1 Test principle
Predetermined width of the sample is manually peeled off the film layer to be separated, and the two ends of the peeled-off sample are respectively clamped on two clamps. The two clamps move relative to each other to perform T -type peeling and pass force on the movable clamp. The value sensor measures the average peel force between the layers of the composite film, that is, the peel strength.
4.2 Scope of application
(1) XLW (EC) intelligent electronic tensile testing machine is suitable for plastic film, composite materials, soft packaging materials, plastic hoses, adhesives, adhesive tapes, stickers, medical patches, release paper, protective film, The peel force, peel strength, tensile strength, elongation at break, tear, heat seal strength, adhesion, and puncture force of the combination cover, metal foil, separator, backing material, non-woven fabric, rubber, paper, etc. Open force, tear force, low speed unwind force, peel force, pull force, etc.
(2) XLW (EC) intelligent electronic tensile testing machine complies with GB 8808 , GB/T 1040.1-2006 , GB/T 1040.2 , GB/T 1040.3 , 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 2791 , GB/T 2792 , GB/T 17590 , ISO 37 , ASTM E4 , ASTM D882 , ASTM D1938 , ASTM D3330 , ASTM F88 , ASTM F904 , JIS P8113 , QB/T 2358 , QB/T 1130 .
4.3 Equipment Parameters
The test specifications of the equipment are 50 N , 500 N. Customers can choose according to the needs of the test. The test accuracy of the equipment is better than 0.5 , which effectively guarantees the accuracy of the test data. Devices which support, two-way test mode compression, tension and compression direction are seven kinds of test for speed set by the user self, respectively, 50 mm / min, 100 mm / min, 150 mm / min, 200 mm / min, 250 mm/min , 300 mm/min , 500 mm/min . This device integrates eight independent test programs such as peeling, stretching, tearing, heat sealing, and puncture resistance, providing users with a wide selection of test items. This equipment adopts the pneumatic sample clamping mode to prevent the sample from slipping and ensure the accuracy of the test data. Limiting protection, overload protection and automatic return to the intelligent configuration to ensure the safety of the user's operation. Support LystemTM laboratory data sharing system for unified management of test data5 , the test process
(1) Cut 5 specimens each of 15 mm in width and 200 mm in length along the horizontal and vertical directions of the roll of the tetrahydropile wrapping tape using a sampler .
(2) Manually pre-strip 50 mm at one end of the specimen along the length .
(3) The two ends of the stripped part of the sample are clamped by the upper and lower clamps of the device, respectively, so that the long axis direction of the sample coincides with the center line of the two clamps.
(4) Set test parameters such as test speed and sample width.
(5) Click the test start option, the test begins, the equipment automatically tests the force value during the sample stripping process, and reports the final test results.
6 , test results
The peel force between the longitudinal milk Tetra pillow paper layer and plastic layers, respectively, a lateral release force 7.354 N, 7.156 N.
7. Conclusion
XLW (EC) Intelligent Electronic Tensile Tester is a high-end testing instrument that is used to test the peel strength of composite packaging films such as plastic composite film and Tetra Pak. It has the advantages of easy operation, high data accuracy, and true composite film. The composite fastness of the material. Labthink has been dedicated to providing professional testing services and testing equipment to customers around the world , and is interested in the key performance related testing equipment and technical information for oxygen packaging, sealing strength, sealing, and solvent residues in dairy packaging materials. You can visit the website of Jinan Languang Company to view or call Jinan Languang Consulting. The more you understand, the more trust! Labthink expects to enhance technology exchanges and cooperation with enterprises and institutions in the industry!
LED-Fluorescent Lamp Protection Sleeves/PET Explosion-proof tube LED Light Heat Shrink Tube
Product Description:
LED-Fluorescent Lamp Protection Sleeves is made of PET materials, PET Explosion-proof tube LED Light Heat Shrink Tube with superior transparency, good heat dissipationeffect, insulation, protect the glass not to break.
Feature & benefit:
a) White LED-PET heat-shrink tube can homogenize the dot light to area light.
b) The uniform theory of light diffusion heat shrink sleeve is that the light ray will generate many refraction, reflection and scattering when the light go through the different refraction rate medium and get the effect of optical diffusion.
c) Light transmittance can be up to 85-93%, haze 95-99%, customizable.
d) RoHS compliant, no mercury, uvioresistant,save energy and low carbon.
Application:
It`s widely applied to T5,T6,T8,T10,T12 LED lights for light diffusion and proofing explosion.
Operating indexes:
a) Min. Shrink temp.:60 degrees Celsius
b) Final shrink temp.: 125 degrees Celsius
c) Work temp. : -55~125 degrees Celsius
Instruction:
Increase length 5mm at both ends of the glass lamps when cutting the tube, set the glass lamps which have been scrubbed by alcohol and dried on to the cutting heat shrink tube.
Put them into the 75-85℃constant temperature thermal cycling tunnel furnace to shrink.After 1-2 minutes, check if the tube is shrinkable.
If not, let them shrink sequentially. If the temperature is a little high, the heat shrink tube will generate crystal and black patches. Trim them with art knife after they are cold already, go to next step to install if no problem.
Product Images:
LED & Fluorescent Lamp Protection Sleeves
Fluorescent Lamps Protective Sleeves,FEP Shrink Tube,PTFE Shrink Tube,PFA Heat Shrinkable Tube,Explosion Proof Lamp Tube Shrinkable Film,LED Light Diffusion Film
KEYUACE Materials Co., Ltd. , https://www.insulationtubing.com