Abstract: The setting of heat-sealing parameters directly affects the level of heat-sealing strength of solid beverage small packaging bags for pharmaceutical packaging. Heat-sealing strength is an important physical and mechanical performance index of solid beverage small packaging bags. This paper introduces a method for determining the heat sealing parameters of a small beverage bag for a solid beverage, and introduces a method for determining the heat sealing parameters for the majority of users. Questions for reference. The test equipment used in the test process is the GHS-03 double five-point heat seal gradient meter and XLW (PC) intelligent electronic tensile testing machine produced by Jinan Languang Electromechanical Technology Co., Ltd.
Keywords: heat sealing parameters, heat sealing strength, heat sealing strength, sealing strength, double five-point heat sealing gradient meter, intelligent electronic tensile testing machine, flexible plastic packaging, solid beverage
1. Significance
The heat sealing strength refers to the sealing fastness of the heat sealing edge of the flexible plastic packaging, also known as the heat sealing strength and the sealing strength. The strength value is directly related to the heat sealing parameters such as heat sealing temperature, heat sealing pressure and heat sealing time. If the heat sealing parameters are set too low, it is difficult for the heat sealing layers to be truly fused together. The heat sealing strength is low, which is prone to problems such as cracking and air leakage at the seal, and the phenomenon of wire drawing when cutting the bag is easy to affect the packaging bag. The appearance of the heat seal is too high, and the heat seal is prone to shrinkage, which may even cause the problem of undercut in the heat seal of the packaging bag, causing the package to easily break at the root of the heat seal. Therefore, it is of great significance to determine suitable heat sealing parameters.
Figure 1 Small packaging bag for solid drinks
2. Current situation
At present, there is no relevant standard on how to determine the heat sealing parameters of flexible plastic packaging in China. This article is based on the American standard ASTM F2029-2008 "Test method for determining the heat sealing performance of flexible plastic packaging by measuring the heat sealing strength".
3. Test samples
A composite film sample of a small package of a solid beverage of a certain brand.
4. Testing equipment
This article refers to two types of testing equipment, namely GHS-03 dual five-point heat sealing gradient meter and XLW (PC) intelligent electronic tensile testing machine, both of which are independently developed and produced by Jinan Languang Electromechanical Technology Co., Ltd.
Figure 2 GHS-03 dual five-point heat sealing gradient meter
Figure 3 XLW (PC) intelligent electronic tensile testing machine
4.1 Test principle
The basic principle of the whole test is that the sample is heat-sealed under different heat-sealing parameters. According to the surface state of the sample after heat-sealing and the heat-sealing strength value, the appropriate heat-sealing parameters of the sample are determined.
GHS-03 Double Five-point Heat Seal Gradiometer
This equipment heat seals the samples by means of hot press sealing. Samples are heat-sealed by setting parameters such as heat-sealing pressure, heat-sealing time, and heat-sealing temperature. The equipment has five heat-sealing heads with independent temperature control, which can be used for temperature control.
XLW (PC) intelligent electronic tensile testing machine
The device has two upper and lower fixtures. The upper fixture can move up and down, and the lower fixture is fixed. During the test, the sample is clamped between the two fixtures, and the two fixtures perform relative movement. The force value sensor and the displacement sensor built in the machine are used to collect the force value and displacement changes during the test to calculate the final test. result.
4.2 Scope of application
(1) GHS-03 dual five-point heat sealing gradient meter
It is suitable for heat sealing test of various plastic films, plastic composite films, paper-plastic composite films, co-extruded films, aluminized films, aluminum foil, aluminum-plastic composite films and other film-like materials.
Through special customization, the equipment can also be used for heat sealing tests of container materials such as jelly cup lids, plastic hoses and the like.
Meet many national and international standards, such as QB / T 2358, ASTM F2029, YBB00122003.
(2) XLW (PC) intelligent electronic tensile testing machine
It is suitable for the detection of heat sealing strength, tensile properties, tensile strength and deformation rate, breaking force, tear resistance, 90 degree peeling, 180 degree peeling and other properties.
After special customization or fixtures, the device can also be used for puncture force of infusion bag caps, puncture or pulling force of soft rubber stoppers, oral liquid caps, pulling force of infusion bag caps, tape unwinding force, makeup brush, toothbrush bristle pull Testing of various packaging and product performances such as pulling force, tearing force of sealing film.
Meet many national and international standards, ISO 37, GB / T 2790, GB / T 2791, GB / T 10004, GB 8808, GB / T 1040.1 ~ GB / T 1040.4, GB / T 1040.5, QB / T 2358, QB / T 1130, ASTM D882, ASTM D1938, ASTM D3330 and more than 20 domestic and foreign related standards.
4.3 Device parameters
(1) GHS-03 dual five-point heat sealing gradient meter
The control range of the heat sealing temperature is room temperature ~ 250 ℃, and the temperature control accuracy is ± 0.2 ℃; the control range of the heat sealing pressure is 0.1MPa ~ 0.7 MPa; the setting range of the heat sealing time is 0.1 ~ 999.9 s.
Digital PID temperature control technology can not only quickly reach the set temperature, but also effectively avoid temperature fluctuations.
Two test start modes, manual and pedal, and anti-scald design, can effectively ensure the user's convenience and safety.
The equipment can complete five sets of heat sealing tests at one time, and obtain the heat sealing performance parameters of the sample accurately and efficiently.
The five upper seal heads are controlled by five cylinders respectively to ensure the stability of the heat sealing process.
Both the upper and lower heads can be independently temperature controlled, providing users with more combinations of test conditions.
(2) XLW (PC) intelligent electronic tensile testing machine
500 N and 50 N force sensors are available, with a test accuracy of 0.5.
According to the relevant standards, the equipment provides seven test speeds of 50 mm / min, 100 mm / min, 150 mm / min, 200 mm / min, 250 mm / min, 300 mm / min and 500 mm / min. Requires free setting.
The ultra-long stroke of 1000 mm can meet the test of materials with large deformation rate.
Intelligent configuration such as limit protection, overload protection, automatic return and power-off memory ensure user's operation safety.
A testing machine integrates seven independent testing procedures such as stretching, peeling, and tearing, which provides users with a variety of testing options.
Support LystemTM laboratory data sharing system, unified management of test results and test reports.
5. Test process
(1) Cut 6 samples with a length of 30 cm and a width of 15 cm from the surface of the sample.
(2) Turn on the GHS-03 double five-point heat sealing instrument, set the heat sealing pressure, heat sealing time, the temperature of the lower heat sealing head can be set to a certain temperature or maintain room temperature, the heat sealing temperature of the upper heat sealing head can be in accordance with Set a certain temperature gradient.
(3) When the upper and lower heat seal heads reach the set temperature, take two of the samples and stack them together (the two thermal covers are in contact with each other), and place the long side of the sample into the heat sealer for heat sealing.
(4) Starting from the highest heat seal temperature of the upper heat seal head mentioned in (2), set the heat seal temperature of the five upper heat seal heads according to a certain temperature gradient, and follow the steps in (3) Samples are heat sealed, and so on, until the samples are heat sealed.
(5) Cut two sample strips with a width of 15 mm from the heat sealing edge corresponding to each heat sealing temperature, and the unfolded length of each sample strip should be at least 10 cm.
(6) Turn on the XLW (PC) intelligent electronic tensile testing machine, and set parameter information such as sample width and test speed.
(7) Clamp the sample strip between the upper and lower fixtures, the long axis of the sample strip coincides with the center line of the two fixtures, click the test option, and the test begins. After the test, the instrument automatically displays the test results.
Figure 4 Test process diagram
(8) Repeat the operation of (7) until all the test strips have been tested.
6. Test results
In this paper, the heat seal pressure is set to 0.3 MPa, the heat seal time is 1 s, the temperature of the lower heat seal head is set to 100 ° C, and the heat seal temperature of the upper heat seal head starts from 130 ° C and increases with a temperature gradient of 5 ° C The heat sealing temperature is 200 ℃. See Table 1 for the average heat seal strength at each heat seal temperature. The test result of the XLW (PC) intelligent electronic tensile testing machine is exactly four decimal places. In this article, only two decimal places are reserved.
Table 1 Heat seal strength test results
In the heat sealing process of the sample, when the heat sealing temperature is above 180 ° C, the problem of shrinkage occurs at the heat sealing part of the sample, so the most suitable heat sealing of the sample is comprehensively evaluated in conjunction with the heat seal strength values ​​in Table 1. The temperature range is 155 ℃ ~ 175 ℃.
7. Conclusion
The heat-sealing parameters have an important influence on the heat-sealing strength of the heat-sealing of the small packaging bags of solid beverages. The flexible plastic packaging can be quickly determined by the GHS-03 double five-point heat sealing gradient meter and the XLW (PC) intelligent electronic tensile testing machine The most suitable heat sealing parameters can avoid problems such as production shutdown when exploring the heat sealing parameters on the packaging heat sealing machine, or leakage of the packaging bag due to improper setting of the heat sealing parameters, and increased probability of broken bags. Labthink has always been committed to providing professional testing equipment and services to customers around the world. In addition to the above two testing equipments, Labthink can also provide you with testing equipment for the barrier performance, physical mechanical performance, and sanitary performance of pharmaceutical packaging. . The more you understand, the more you trust! Labthink looks forward to enhancing technical exchanges and cooperation with enterprises and institutions in the industry!
Lipstick, a cosmetic that is applied to the lips to make them red and bright, is a cosmetic that is mainly used on the lips and can increase the color of the lips or change the color of the lips. It is one of the important makeup.
First of all, before applying lip balm, you must wash your lips, and then apply a layer of lip balm or anti-crack ointment to protect your lips and prevent cracks, so as to better make up. Shade your lips with foundation or masking cream.
Next, use a lip liner to outline the ideal line, with the lips naturally relaxed, so that you can better observe the shape of the lip line. Draw in the order of the upper and lower lips, with the upper lip closed and drawn from the center to the sides. The bottom lip is drawn from the sides toward the center. If you don't want to accentuate your lips, you can skip the line. Hold a lipstick or lipstick-stained lip brush between your thumb and forefinger. Press your pinky finger against your chin to hold and support the handle. Trace the lip hill and the center of your lower lip to determine the thickness of your lip.
Then, from the corners of the upper lip to the middle of the lip, and from the corners of the lower lip to the middle of the lip, with the lips slightly open to create a better line. Pay attention to the balance between left and right. After applying the outside, gradually apply to the inside until it is all over. Press lightly on your lips with a face paper to remove excess oil. Press, slightly open the lips, the effect can reach the inside of the lips. Plump up your lips by applying a glossy lipstick or an accent silvery lipstick in the center of your lips.
Lip Stick,Matte Lipstick,Waterproof Lipstick,Natural Lipstick
DONGGUAN VOLES COMMODITY CO., LTD , https://www.volesvip.com