Xin Nian Hao! May good fortune be abundant this Chinese New Year. GBPI is grateful for the meeting in 2022, looking forward to our 2023

Abstract: Water vapor transmission rate is an important performance index to characterize the solar backsheet's barrier performance to external water vapor (moisture), which directly affects the working condition and service life of solar cells. This paper uses the W413 2.0 infrared water vapor transmission rate tester developed by Guangzhou Biaoji Packaging Equipment Co., Ltd. to test the water vapor transmission rate of solar backsheet samples, and introduces the test standard, test process and test results for reference of major enterprises in selecting water vapor barrier testing equipment and test methods. In the field of solar photovoltaic power generation, solar backsheets play an important role. Usually, the solar backsheet is located at the outermost layer of the solar cell module's backside, thus playing a protective and supporting role for the solar cell module. The backsheet should have reliable electrical insulation, water vapor barrier, aging resistance, mechanical strength and toughness to keep the solar cell in the best working condition and maintain a service life of 25 years.Water vapor barrier performance is one of the important indicators to measure the performance of solar backsheet. If the solar backsheet has poor water vapor barrier performance, water vapor penetrating into the encapsulation system through the backsheet will affect the EVA bonding of the encapsulation film, causing the backsheet and the encapsulation film EVA to delaminate, causing the cell to be oxidized and thus seriously reducing the cell power generation efficiency and the service life of the module. As the solar cell set is placed outdoors for a long time, the humidity is greater on rainy days and water vapor has a greater impact on the solar PV module. Therefore, it is very important to conduct water vapor transmission rate test on solar backsheet to evaluate its water vapor barrier performance. 01 Testing standards The equipment used in this test is the W413 2.0 infrared method water vapor transmission rate tester developed by GBPI. The equipment is equipped with self-developed high-precision infrared moisture sensor, with ultra-high stability and ultra-low failure rate, wide range, high sensitivity, resolution up to 0.0001 g/(m2-24h); using semiconductor refrigeration chip two-way automatic temperature control technology, temperature control accuracy of 0.1 ℃; using dual airflow humidity method to control humidity, humidity stability, humidity accurate to ± 2% RH. Meanwhile, the instrument is equipped with 3 chambers, independent data, can meet the high throughput testing needs, high testing efficiency. This testing equipment conforms to many domestic and international standards such as GB/T 26253, YBB 00092003, ASTM F1249, BS EN ISO 15106-2, JIS K7129, etc.   Testing principle: W413 2.0 water vapor transmission rate tester adopts the principle of infrared method. The pre-treated specimen is fixed in the middle of the test chamber, and t...

On January 2-6, 2023, GBPI successfully held the 2022 annual summary and 2023 annual planning meeting! The president Mr. Zhou, the main responsible persons of R&D, production, sales and marketing and other functions attended this meeting. These past achievements are the most solid foundation for our future sustainable development and the beginning of our "new journey". Faced with the uncertainty of the future external environment and policies, challenges and risks are everywhere on the road of development. In the future, with strategic planning as a guide, the organization will be energetic, the team will be energetic, the process and system will provide guarantee, and the majestic power of all employees will be gathered, the prosperous development of GBPI will be unstoppable! Looking ahead to 2023 GBPI insists on serving the country with industry and insists on doing the business of national support and protecting people's health and safety. The company is in the process of rapid change, we insist on achieving digital management, focusing on strategic opportunity points, constructing a sustainable leading edge, competing for the strategic heights of the industry, and constantly winning, so that the company can develop in a high-quality and sustainable way! GBPI should face the challenges and rise to the challenges in the complex and changing industry situation, continuously enhance the company's cultural self-confidence and innovate customer value, and all employees should not only deeply understand and implement the company's development philosophy, but also be down-to-earth and constantly refine their internal skills to find the first opportunity in the development and open up a new situation in the changing situation to win the battle of 2023! Gathering our strengths and making breakthroughs together. The meeting was held to enhance the confidence of all the staff of BSI. Standing at the starting point of the new year, all GBPI will work hard to write a new chapter in the development of packaging testing industry together!

Abstract The tightness of the mask is an important indicator for evaluating the protective performance of the mask. The better the tightness, the better the fit between the selected mask and the user's face shape. The user can get the expected protective effect by wearing this mask. This article briefly introduces the test method, principle and equipment of the mask tightness test. From the test process described in this article, it is relatively simple to use the GB-MH180 Mask Tightness Tester to test the mask fit performance, and the tester is easy to operate and intelligent. The tester adopts imported embedded particle counter and imported air filter, the test result is highly accurate, which can quickly and accurately verify the tightness of respiratory protective equipment such as masks.   The protective effect of the mask depends not only on the filtration efficiency of the filter material, but also on the degree of close contact with the wearer's face. In actual use, it is impossible for the edge of the mask to completely fit the face. Except for a small amount pollutants that penetrates through the filter material, most of the other pollutants leak from the fitting part of the mask and the face. Ordinary users often only pay attention to common issues such as the protection of masks against particulate matter and germs, while ignoring the individuality of whether the mask matches the user. suitable to reduce its protective effect. Therefore, the tightness is an important indicator for evaluating the protective performance of masks. GB 19083-2010 technical requirements for medical protective masks stipulates 'The design of the mask should provide good tightness, and the total fit factor of the mask should not be less than 100'.   PART 01 Test methods and instrument Standard US Occupational Safety and Health Administration (OSHA) standard "Respiratory Protection" (29 CFR1910.134) GB 19083-2010 Technical requirements for medical protective masks; GB/T 18664-2002 Selection, use and maintenance of respiratory protective equipment; OSHA 29 CFR1910.134 Respiratory Protection.   The tightness of respiratory protective item such as masks is determined by a fit test. Suitability tests are divided into qualitative suitability tests and quantitative suitability tests. Qualitative suitability tests are based on the subject's perception of the test agent (saccharin, irritating smoke, etc.) to judge the results. Due to the subjectivity of its judgment, it is easy to lead to the failure of the test results. The quantitative fit test requires the aid of a mask tightness tester. The test principle of the quantitative suitability test: by using the mask tightness tester to quantitatively measure the concentration of the external testing agent of the respiratory protective equipment and the concentration of the testing agent leaking into the respiratory protective equipment during the simulated operation activities of the p...

ABSTRACT: The residue-on-evaporation method of purified water is to detect the quality of residue on evaporation solids obtained after 100 mL of purified water is evaporated and dried. The difficulty is that the operator needs to repeat the operation to achieve the 0.3mg constant weight value required by the Chinese Pharmacopoeia. The traditional test method has the shortcomings of low efficiency and manual duty. After long-term practice and repeated verification, it adopts an integrated automatic structure design, equipped with rapid water bath evaporation and gas balance technology, which can realize automatic feeding, water bath evaporation, blast drying and cooling balance, constant temperature weighing five-in-one automatic test. Through the repeatability experiment and gradient design experiment, the results show that: 2 rounds of weighing can reach a constant weight error value of 0.3mg, when the scalar amount is 9.4mg/100mL, the precision (RSD) is 0.73%, and the accuracy of the gradient design experiment is high. There is no deviation between parallel samples. Conclusion: After the innovation of the residue on evaporation detection technology of purified water, the test time to reach constant mass value is short, the operation is simple, and the data accuracy and precision are good. KEYWORDS: purified water; residue on evaporation; constantmass; automated test 01 Standard requirements According to the requirements of Chinese Pharmacopoeia 2020 Edition Part II "Purified Water": Take 100mL of this product, put it in an evaporating dish with constant weight at 105°C, evaporate it to dryness on a water bath, and dry it at 105°C to constant weight, and the remaining residue should not exceed 1mg. The Chinese Pharmacopoeia defines constant weight as constant weight, unless otherwise specified, refers to the weight of the test sample after two consecutive drying or igniting weighing the difference is less than 0.3mg; the second drying to constant weight and each subsequent weighing should be carried out after 1 hour of drying under the specified conditions. According to the requirements of European Pharmacopoeia 10.0 Edition, about “Purified water in containers“， Residue on evaporation: maximum 0.001 per cent. Evaporate 100 mL to dryness on a water-bath and dry in an oven at 100-105 °C. The residue weighs a maximum of 1 mg. The requirements of the Chinese Pharmacopoeia, the US Pharmacopoeia and the European Pharmacopoeia for limits of constant mass and residue on evaporation in purified water are shown in Table 1. It is worth noting that the US Pharmacopoeia does not require residue-on-evaporation items for purified water, the European Pharmacopoeia has no residue on evaporation testing items for Purified water in bulk, while Purified water in containers does not. For residue on evaporation testing items, the limit requirement is also ≤10mg/L, but there is no requi...