삼보과학

[기공측정] Porometry를 이용한 Nonwoven의 기공측정
작성자 : 삼보과학 작성일 : 2011-04-06 조회수 : 4628
파일첨부 :
다음 논문은 porometry를 이용하여 nonwoven 산업분야에서 bubble point(최대기공), 평균기공크기, 기공분포도, 기체투과도, 액체투과도를 측정할 수 있음을 소개하고 있습니다. 아래에서는 논문의 일부분을 발췌하여 옮겨놓았습니다. 전체내용이 필요하신 분은 전화나 이메일로 신청하여 주시기 바랍니다. [제목] The Use of Porometry in Nonwoven Pore Analysis by C. Rebecca Stillwell Application Engineer/Porous Materials, Inc. ABSTRACT : Porometry testing techniques have undergone tremendous development in the last few years. Many of the recent innovations in pore characterization were specifically designed to improve product testing and development in the paper and other nonwoven industries. Recent advances include automated testing for improved reliability and accuracy. Additionally, ease of porormeter use has been greatly improved with the implementation of MS Windows software. A thorough understanding of porometry testing techniques is imperative for optimal pore materials testing: both pore type and information sought concerning the properties of a material need to be considered. Porometry testing is ideally suited for testing of paper and other nonwoven materials. Studies have shown that companies using accurate pore characterization techniques can gain a competitive edge in their respective market. More research and development is underway which will continue to improve porometry versatility in the nonwovens industry. I. INTRODUCTION With the emergence of ISO 9000 standards, accurate pore characterization has become critical in the nonwovens industries. Although the theoretical understanding of porous material properties, such as bubble point, pore distribution, and gas/liquid permeability have been thoroughly described by the scientific community, routine application of this knowledge to industry has been slow, due to several factors. Many companies are not optimally testing their materials and products because of a general unfamiliarity with the optimal uses of a porometer. In many instances, for instance, porometry is the preferable testing method for paper and other nonwoven materials. Porometers yield a wealth of information, including bubble point, gas and liquid permeability, average pore diameter, and pore distribution and are ideally suited for testing coated paper. This paper will describe the advances and innovative techniques which have made porometry testing extremely accurage, reliable, and user friendly. Additionally, the optimal uses of porometry vs. porosimetry will be discussed. Emphasis shall be placed on discerning the appropriate test based on specific characterization needs and pore type. We will also present a case study of Barnhardt Manufacturing Corporation, a leading maker of nonwoven media. Barnhardt's recent utilization of new automated testing technology has allowed them to gain a technical edge in a highly competitive market. Finally, current and future trends in testing development will be elucidated. - 중략 - VI. CURRENT POROMETRY AND POROSIMETRY DEVELOPMENT New ideas and directions for porometry and porosimetry are constantly being explored, tested and implemented. The areas currently receiveing the most attention are the following: 1. Extending the range of pore size characterization: Wide and extreamly varied use of porometry in industry demands extending the pore size range able to be accurately measured. Most porometers are able to handle pressures of less than 200PSI. A Complete Filter Analyzer with a 500 PSI capability has now been developed by PMI to extend the measurable pore size range even further. As previously discussed, the development of the MicroFlow porometer has extended the measurable porosimeter and porometer testing range. 2. Improving the ease of instrument use: Both hardware and software modifications are currently under development which will allow non-technical operators to operate the instruments without difficulty. 3. Increasing the level of instruments automation: Work is in progress to facilitate the efficiency of the testing process by automating sample preparation and by introducing multi-sample instruments. 4. Implementation of multiple sample testing capabilites(especially in porometry): Porometers will be available early in 1996 which accommodate more than on sample. Although the porometer will still charcterize one sample at a time, the porometer can be instructed to automatically test each sample in a specified order and to save the results of each test in a separate file. This allows the user to set the machine to run many tests automatically, decreasng the amount of total work for the user and saving time. 5. Improving data manipulations: Software improvements are constantly revised and are driven overlays are now available as well as data format usable by Excel and other spreadsheet programs. Real time comparison with a standard and a Go/NoGo report is under development which will allow a programmable decision about the acceptable quality of a test under specific criteria. 6. Improving the ability to test large areas/parts: Testing an entire system, rather that just a small sample of the system is imperative to dscerning true product performance. We will soon have the ability to accommodate entire filter cartridges for testing, for instance. The same cartridge can be retested ad infinitum, yielding important data about filter integrity over time. Additionally, the effectiveness of various methods of filter cleaning could be discerned. 7. Improving Accuracy: Lowering the percentage error and striving towards improved accuracy in porometry and porosimetry is a constant pursuit. The innovative design of the Micro-Flow Porometer is one innovation which will greatly improve testing accuracy for specific materials. 8. Assembly Line Testing: Engineering work is in progress to create an instrument which will test a material by repeated sampling from a continuously processed material. - 끝 -

이전글	[기공측정] Microfiltration membrane의 기공구조 측정
다음글	[입도분석] 굴절율 리스트

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