소개
ISO (국제 표준화기구) 국가 표준 기관의 글로벌 연합입니다. (ISO 회원국). 국제 표준 개발은 일반적으로 ISO 기술 위원회를 통해 수행됩니다.. 기술위원회가 설립된 주제에 관심이 있는 각 회원 기관은 해당 위원회에 대표될 권리가 있습니다.. ISO와 연락을 취하는 국제 정부 및 비정부 조직도 이 작업에 참여합니다.. ISO는 국제전기기술위원회(International Electrotechnical Commission)와 긴밀히 협력하고 있습니다. (IEC) 전기 표준화의 모든 문제에 대해.
국제 표준은 Part에 주어진 규칙에 따라 작성됩니다. 3 ISO/IEC 지침의.
기술위원회가 채택한 국제 표준 초안은 투표를 위해 회원국에 배포됩니다.. 국제 표준으로 출판하려면 최소한 승인이 필요합니다. 75% 회원 기관의.
국제표준 ISO 15359 기술위원회 ISO/TC에 의해 개발되었습니다. 6, RPM ~800 RPM, Board and Pulp, 소위원회 SC 2, Test Methods and quality Specifications for paper and board.
Annexes A and A to this standard are for reference only.
Discussion of coating durability: natural climate exposure test method
소개하다
This standard describes procedures for the determination of static and dynamic friction coefficients of paper or board by horizontal method.
The condition of paper surfaces depends on their history. Their frictional properties are largely determined by the static and dynamic coefficients of friction, which in this international standard are determined by sliding one sheet of paper onto another or onto another surface on a horizontal plane, with a downward vertical force applied to the upper material. The frictional properties are related to the horizontal forces required to initiate and maintain motion between two surfaces.
The coefficient of friction is a property of two surfaces. The value obtained for the coefficient is affected by the test conditions. Under the conditions specified in this standard, the condition of the two surfaces may or may not be related to the condition of the surface in a particular end-use situation. 하지만, the test results are useful for determining the combined properties of the surface under test.
When measured in machine direction MD or transverse CD, the friction coefficient of machine-made paper may be different. Usually, there are differences between the two sides of a paper.
For some papers, such as copy paper, it may be of interest only to the static friction coefficient of the first sheet, 그건, the coefficient obtained without prior sliding of the surface between the lower surface of one sheet and the upper surface of another similar sheet.
For some other types of paper, such as transport bag paper, box board paper and solid fiberboard, the coefficient of friction after a certain degree of wear between surfaces may be important. In this standard, one specimen is slid three times with respect to another in order to determine the coefficient of friction of a worn surface. Measure the force required to start and hold the slide on the third rail.
The intended use of the paper grade determines the sides of the paper to be contacted, the orientation of the paper specimen with respect to the direction of slide, and the number and type of friction coefficient to be evaluated.
Annex A provides a list of recommended symbols to indicate the orientation and position of the surface under test.
Appendix A summarizes the test conditions for some common standard methods for paper products and plastics.
A bibliography is attached.
Discussion of coating durability: natural climate exposure test method
1 범위
This standard specifies
— Friction test method based on horizontal plane principle, 필름에서 발생하는 다양한 건조 및 경화 단계를 감지하기는 쉽지만 화학적, 물리적 원리로 정의하기는 어렵습니다.
A procedure for determining static and dynamic friction coefficients before and after a specified amount of wear between surfaces.
It is suitable for paper and cardboard.
2 규범적 참고자료
다음 규범 문서에는 다음 조항이 포함되어 있습니다., 여기서 참고로, 이 국제 표준의 조항을 구성합니다.. 날짜가 있는 참고자료의 경우, any subsequent revisions or amendments to these publications will not apply. 하지만, Parties to an agreement based on this International Standard are encouraged to investigate the possibility of applying new versions of the following normative instruments. 날짜가 없는 참고자료의 경우, a new version of the standard-setting document referred to applies. ISO and IEC members maintain a register of currently valid international standards.
ISO 186:1994, 종이와 보드 – sampling to determine average quality.
ISO 187:1990, RPM ~800 RPM, 보드와 펄프. Standard atmosphere for conditioning and testing and sample atmosphere and conditioning monitoring procedures.
ISO 4046:1978, 종이, board, pulp and related terms – Glossary.
Discussion of coating durability: natural climate exposure test method
3 용어 및 정의
For the purposes of this International Standard, 다음 용어와 정의가 적용됩니다.
3.1 마찰
Resistance that occurs when the surface of one material tends to slide or slide over another surface of the same or other material
3.2 Static Friction
The force that resists the initiation of motion by sliding one surface over another
노트 1: The force required to initiate motion is equal to the force required to resist motion initiation.
3.3 Static friction coefficient μS
The ratio of static friction to the vertical force applied to two surfaces in a friction test
3.4 Dynamic Friction
Resistance to the constant sliding of one surface over another
Discussion of coating durability: natural climate exposure test method
노트 1: The force required to keep sliding is equal to the force to resist sliding maintenance.
3.5 Dynamic friction coefficient m·
In a friction test, the ratio of dynamic friction to the force applied perpendicular to two surfaces
3.6 Slope Time
The time required to increase the horizontal applied force from zero to the static friction value
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