Application of quality inspection technology for t

2022-08-01
  • Detail

With the rapid development of flexible packaging industry, thin film materials are widely used in the material industry. Membrane materials have been widely used and developed in the large infusion industry because of their multiple superior properties. Large infusion bags with flexible packaging are gradually replacing glass infusion bottles

in the nearly 100 year development process of glass bottle infusion, despite several improvements, the glass bottle has always been unable to get rid of the common defects of glass, such as fragile and not conducive to transportation, poor mouth sealing, easy chip falling during puncture, and the need to form an air circuit during infusion to increase secondary air pollution. In order to solve this problem, as early as the 1980s, our country began to study the use of high molecular plastics to make infusion packaging. At first, PVC flexible packaging infusion bags were used in large quantities. These products have no falling objects, light weight, strong impact resistance and rapid development. However, the PVC flexible packaging bag material contains PVC monomer, which is not conducive to human health, and because the material is thick and difficult to process, its high oxygen and water vapor transmission, poor tensile strength and other problems greatly limit its application in infusion packaging

in this case, the polyolefin multi-layer coextrusion film uses multi-layer polyolefin materials to melt and extrude at the same time, which eliminates the instability and pollution caused by the adhesive, and increases the heat sealing and drop resistance of the film, as well as the barrier performance against water vapor, oxygen, nitrogen, etc. At present, coextrusion film material accounts for an increasing proportion in the whole infusion packaging industry with its unique advantages, and the overall appearance of its products is more and more outstanding than other types of packaging belts. According to the relevant standards of drug packaging materials and the author's experience in the detection instrument industry for many years, this paper briefly introduces the quality detection technology of infusion flexible packaging products

I. detection of air permeability and moisture permeability of infusion bag film materials

the research and control of air permeability and moisture permeability of infusion bag film materials is particularly important in the infusion flexible packaging industry, which directly affects the product quality. At present, the air permeability tester and moisture permeability tester developed by Jinan Languang company have integrated the most advanced technology. Through powerful software functions, automatic error correction and troubleshooting, and high-precision automatic testing, they meet the quality control requirements for these two detection indicators in the industry. The two instruments use international top-level core test components to ensure the accuracy of the test. Users do not need to invest as much as before to purchase expensive incoming instruments to complete the monitoring of these two indicators

II. Testing of friction coefficient of flexible packaging materials

through the testing of friction coefficient of packaging materials, the opening of infusion bags and the packaging speed of packaging machines can be controlled and adjusted. For the film material manufacturer, the dynamic and static friction coefficients of the film material can be controlled by testing the type and content of the opening agent and smoothing agent in the resin. The mxd-01 friction coefficient instrument provided by Jinan Languang company for customers has a unique setting of vibration coefficient, so as to be suitable for intelligent data processing of different materials. The large screen LCD displays the curve in real time to visually judge the uniformity of the friction coefficient on the surface of materials. At the same time, the company's fpt-f1 friction/stripping tester can also meet the needs of customers in the industry for testing the friction coefficient at different temperatures, and has the dual testing functions of stripping and friction coefficient

III. detection of the sealing heat sealing strength of infusion bag film material

the heat sealing strength is an important performance index for the infusion bag film material. In order to achieve the packaging purpose, the sealing must have a certain strength to be able to withstand the internal and external pressure, so as to ensure that it will not crack or damage in the circulation process. For the detection of this index, two instruments are required for comprehensive test. One instrument is specially used for heat sealing sample preparation, and the other instrument is required for heat sealing strength test

1. Heat sealing tester. In order to meet the needs of customers at different levels, Jinan Languang has provided customers with three types of heat sealing testers, namely hst-h1, hst-h2 and rtd-r1. The three instruments are controlled by microcomputer in a centralized manner, so that the temperature, time and pressure of heat sealing are accurate and reliable. The core components are imported components, ensuring the lasting performance of the instrument

2. The PC type intelligent electronic tensile testing machine can test the heat sealing performance of membrane materials, and the equipment can be fully controlled by the computer, automatically judge and stop the machine, and the fixture can automatically return to the position for group statistical analysis test. LCD menu interface, the user only needs to select the corresponding test items, and the instrument can automatically complete the functions such as tensile strength and elongation, precision, high heat sealing strength, tear strength, peel strength, elastic modulus, constant extension stress, etc. The software has powerful analysis function, and can carry out secondary analysis and superposition comparison of test results

IV. sealing test of infusion bag packaging

sealing performance is also an important indicator of packaging, and sealing also has a great impact on product quality. Poor sealing is the main cause of future leakage. At present, the sealing test instrument of Jinan Languang is widely used in the industry. It uses the vacuum principle to maintain the predetermined time under the corresponding pressure according to the national standards, and observe the leakage during the test by visual inspection. The quality of infusion bag packaging can be measured through the measurement of sealing, and then the rationality of the sealing process can be determined

v. thickness detection of film materials for infusion bags

the core factor that coextrusion film materials can replace glass bottle packaging is that coextrusion film materials can achieve high barrier performance almost similar to glass bottle packaging. In order to ensure the uniformity and stability of the barrier performance of the membrane, it is necessary to strictly control the thickness of the membrane. At first, micrometers or some point contact thickness gauges were mainly used in the industry to control, but this is far from meeting the requirements of the industry for the linear displacement control of thickness linear stepper rotation angle. According to gb6672 and relevant international and American standards, the mechanical surface contact measurement method must be used for testing. At present, the domestic instrument manufacturer that can meet this requirement is Jinan Languang company. This model chy-c1 thickness gauge adopts the most advanced technical achievements in the field of measurement in the world, ensuring a high resolution of 0.1um, and fully meeting customers' requirements for high-precision thickness measurement

the above inspection indexes of infusion bags and their film materials are very important to adjust the production process and improve the product quality in the actual production. Through the corresponding test instruments, we can control and master various reasonable technical parameters, which can be well used in production, control quality and save cost

Jinan Languang Electromechanical Technology Development Center

(author./zhangweisheng)

Copyright © 2011 JIN SHI