Y310 2.0 Oxygen Transmission Rate Tester Precautions The laboratory temperature affects the experimental results and should be controlled at (23±2)℃. Only one person should be allowed to conduct experiments in every 20㎡ laboratory. Too many people will cause the laboratory temperature to rise, which will affect the experimental data. At the same time, the temperature control and experimental process should not be frequently entered and exited to reduce the impact of changes in the test environment on the experimental data. The sample should not have creases, pinholes, or gaps. It is forbidden to wipe the instrument housing with alcohol cleaners (such as isopropyl alcohol, anhydrous alcohol, alcohol), otherwise it will cause the housing to crack or scratch. It is recommended to clean the sealing grease remaining in the cavity before loading the sample, and then apply a layer of sealing grease to ensure that there is no leakage. Maintenance The voltage of the power supply during operation must meet the value allowed by the equipment, otherwise a voltage regulator greater than 1/3 of the actual power should be set. The current allowable value of the power supply line should be greater than 1/3 of the actual current. The instrument must be well grounded when installed. Keep the instrument test environment temperature at 23℃±2℃ and the humidity at 50±10%. The instrument must be installed on a horizontal, solid, stable, and vibration-free table. There is no airflow interference and no strong electromagnetic interference. 99.999% high-purity nitrogen must be used for experiments, otherwise the sensor will be damaged. When the gas interface on the back of the instrument is empty, it must be sealed with a blind plug, otherwise it will affect the performance of the gas filter. The cavity seal will age after long-term use and affect the sealing effect, and must be replaced in time. After each experiment, you need to wipe the cavity with pure cotton paper or a clean rag to avoid dirt. When the instrument is not in use, keep it clean and dry and cut off the power supply. If the instrument is not used for a long time, it is recommended to rinse it once a week for 8 hours, and place an aluminum film before rinsing. When cleaning the instrument on a daily basis, it is recommended to use a soft cloth dipped in water or a mild detergent to clean the outside of the instrument regularly. Do not allow dust to enter the test chamber, otherwise it may damage the internal circuit or sensor of the instrument, resulting in unstable readings or no readings.

With the development of the economy and the improvement of people's living standards, more and more people have pets. People use pets as a support for their feelings and to meet our emotional needs, corresponding to the rapid development of the pet food industry, the market competition is gradually fierce, the importance of pet food packaging has gradually come to the fore. Cat food / dog food packaging bags selected plastic material should have a barrier, heat resistance, sealing, able to prevent food deterioration. General selection of multi-layer plastic composite, common materials include PET/AL/PE, PET/NY/PE, PET/MPET/PE, PET/AL/PET/PE, PET/NY/AL/PE, PET/NY/AL/RCPP, high-temperature dry distillation bags for wet food, soft canned food packaging. Like other foods, pet food has a shelf life. During the shelf life, pet food needs to ensure that no spoilage or loss of nutrients occurs. Pet food nutrients can meet the needs of pet growth, but also is a good natural medium for microbial growth. If the packaging material has poor barrier properties, the oxygen and moisture that passes through the packaging can lead to the growth of microorganisms. Under the action of microorganisms, the nutrients (proteins, fats, etc.) in the pet food will be decomposed, which not only affects the sensory of the pet food, but also loses the nutritional value of proteins, fats and other original substances. The growth of microorganisms is mainly due to three factors: temperature, oxygen, moisture, oxygen is the main external cause of rancidity, so the pet food packaging must have a good barrier performance to the outside world of oxygen, in order to effectively ensure the quality of pet food in the shelf period. This paper utilizes     GBPI's self-developed N530 2.0 differential pressure gas permeability tester to test the oxygen barrier performance of dog food packaging bags sent by customers to provide technical references for relevant pet food package production and use of enterprises to select the oxygen barrier performance test equipment and test methods. Test Principle: N530 2.0 Gas Transmission Rate Tester adopts the principle of differential pressure method. The treated specimen is placed between the upper and lower chambers, the vacuum pump is used to evacuate the whole gas circuit system, and then an atmospheric pressure of experimental gas is added to the upper chamber to form a constant pressure difference between the upper and lower chambers. Under the action of pressure gradient, the gas permeates through the film from the upper cavity to the lower cavity, and the system can calculate the gas permeability and other barrier performance parameters of the specimen through the pressure change of the lower cavity. 01 Test Sample The customer provided dog food packaging bags, its main component to PA as the main barrier function resin multi-layer co-extruded film, bags, sample A's structure PE / Tie / PA / TIE / PE, sample B's structure f...

Abstract: Peeling force is to evaluate the composite film peeling performance indicators, the size of the value reflects the composition of the composite film monolayer membrane composite fastness. Low peeling force of composite film materials, after making the contents of the bag packaging is prone to delamination phenomenon, resulting in composite film impact resistance, puncture resistance and other physical and mechanical properties and barrier properties decline, affecting the appearance and quality of the product. In this paper, we use the GBH-2 electronic tensile testing machine independently developed by Guangzhou Standard International to carry out the peeling test of composite film for pickles packaging, introduce the test standard, test equipment, test process, etc., and effectively evaluate the anti-interlayer peeling performance of composite film for pickles packaging. Pickled vegetables is a general term for a variety of vegetable products made from vegetables as the main raw materials and using different pickling techniques. According to the process and auxiliary materials, pickles can be divided into soy sauce, salt pickles, soy sauce pickles, sugar pickles, vinegar pickles, sweet and sour pickles, shrimp oil pickles, brine pickles, bad pickles and so on. Due to the unique aroma of sweet and crispy pickles, or salty and spicy pickles, and their nutritional value, they have won the favour of the masses and have become one of the most popular foodstuffs to accompany meals. Bagging is a common packaging form of pickles, the bag material is mainly plastic composite film, aluminium composite film, etc., generally using vacuum packaging form to prevent pickles rancidity. In the actual use of the process, some pickles finished packaging will appear composite film delamination phenomenon. If the adhesive used in the composite film and the ink used in the external printing of the package is of poor quality and not resistant to high temperature or acid or alkali, it is easy to cause the composite film to reduce the composite fastness of each single layer of the film and the composite film is prone to delamination after high-temperature sterilisation or contact with the acid or alkali components in pickles. On the other hand, if the composite film using the adhesive coating amount is too low or too thick, or uneven coating, will also cause the composite film between the layers of film composite fastness is poor, easy to occur delamination. Once the phenomenon of delamination occurs, the bag composite film impact resistance, puncture resistance and other physical and mechanical properties will decline, resulting in easy rupture of the bag, leakage; at the same time will also affect the composite film on the outside world of oxygen barrier properties, resulting in an increase in the amount of oxygen through the packaging contents are prone to deterioration, flavour, and seriously affect the appearance of the product and product quality. Theref...

From the analysis of the formation mechanism of printing fastness and test methods, we can better understand the way to improve the printing fastness (mainly on the polyurethane film for discussion).    1. Selection of raw materials In the production of plastic film should be selected when the raw material does not contain or less plastic additives. We can judge the content of additives according to the technical information about the grade, performance and use of the resin. When we have to use raw materials containing more additives, we should also mix them with those without additives. The reason for this choice is that in the process of forming and placing the folding out of the additives will form a film of oil, thus weakening the adhesion of the ink on the film.    2. Raw material modification 1) blending modification: polyolefin and printing performance of polymers blended to improve printing performance is a newly developed compelling method. For example, with polyacrylic resin modified high-density polyethylene greatly improve the adhesion of ink to polyethylene, when which is mixed with 5-20% of polymethacrylic acid early ester (PMMA), the above-mentioned adhesion increased by seven times. Again, such as with more chlorine content of chlorinated polyethylene work mixing, only a small amount can be added to significantly improve the adhesion of polyethylene and oil black. When mixed with 5% CPE-55 blends and ink bonding than (chun) HDPE three times higher. According to another report, some plastic polymer processing aids (rheology modifiers, etc.), in addition to improve yield, eliminate melt rupture, but also has to improve the role of printing adhesion. Add polyacrylic acid resin or chlorinated polypropylene and other reasons to improve the printability of HDPE is based on their poor compatibility with HDPE, when it is in the HDPE as the substrate of the blending system constitutes a dispersed phase and live in the open film surface layer, is obviously conducive to the adhesion with the ink. (2) grafting modification: grafting modification is the use of radiation and other methods to make the polyolefin points to grafting reaction so as to make the polyolefin macromolecular chain with polarity and thus improve the wettability of the material to the ink. Such as maleic anhydride or acrylic acid graft modification of linear density polyethylene after the improvement of its printability. 3) other methods of modification: such as in the polyolefin doped with a small amount of maleic anhydride or its anhydride, but also to a greater extent to improve the polyolefin film ink fastness to print.    3. Printing ink fastness in the printing ink fastness problem, the ink also plays a decisive role. Of course, for different substrates should use its corresponding ink. For example, for cellophane can use nitro cellophane resin ink; for polypropylene film can use chlorinated polypropylene resin ink; for polyethylene film...

The packaging of candy has three main functions. First, it protects the luster, fragrance, and shape of the product and extends its shelf life; second, it prevents microbial and dust contamination and improves product hygiene and safety; third, exquisite product packaging can enhance consumer awareness, purchase desire and commodity value. The packaging forms of candy mainly include twist packaging, pillow packaging, and folding packaging. Twist packaging is the oldest form of packaging. This packaging form is mostly used for candies. Pillow packaging machines are more popular. Most candy manufacturers currently use pillow packaging, while folding packaging is mostly used for chocolate products. The protective function of packaging is directly related to the quality of candy. Since the ingredients of candies themselves vary greatly, packagers have different requirements for the selection of packaging materials for different types of candies. Candies with a low water content are prone to moisture absorption, causing the product to shrivel and become sandy; candies with a high water content are prone to shrinkage and mildew, and ingredients such as starch and butter are prone to oxidation and deterioration when exposed to oxygen. Therefore, special attention should be paid to the gas and moisture-proof functions of candy packaging. Testing of packaging barrier properties: Since the intervention of oxygen and water vapor will cause the deterioration of candy, it is very important to control the oxygen content and water vapor content in the air environment around the candy. This requires controlling the barrier properties of candy packaging materials and the overall packaging. Oxygen Transmission Rate Analyzer Water Vapor Transmission Rate Analyzer Testing of packaging sealing performance: The testing object of sealing performance is the leakage point of the package. By conducting sealing performance testing, data such as the maximum pressure of the packaging and leakage points can be obtained. The GBM-D1 intelligent sealing performance tester can be used with different fixtures to test packaging for bursting, leakage, creep, bubbles, etc. Intelligent Leakage & Sealing Performance Tester Testing of packaging pressure resistance and burst resistance: This testing index can be used to measure the pressure resistance performance of candy packaging and to evaluate the pressure resistance performance of candy packaging during storage, transportation, and sales display. The GBN200G pressure resistance tester is suitable for Test the pressure resistance and bursting strength of various packaging bags. Pressure Resistance Tester Testing of the peeling force of packaging and the mechanical properties of packaging materials: The sealing strength of candy packaging is insufficient, which can easily cause sealing problems during storage, transportation and shelf display of the candy.  If he sealing strength of packaging is too high, which will also brin...