Kahulugan at paggamit
5.1 The results of this test method will indicate the relative vapor transmittance of the tape at its smallest size, usually perpendicular to the backing of the tape.

5.1.1 Compared to the thickness of the tape, the water vapor channel parallel to the glue cup interface is much larger, and the latter is usually an almost separate source of passing vapor.

5.1.2 Some tape types allow a relatively free path in the direction perpendicular to the backing or along the backing path parallel to the adhesive cup interface, thus making the adhesive the primary barrier.

5.2 If the adhesive does not continue to adhere to the cup body flange during exposure, unexpected water vapor channels may occur, then the measurement should be considered unperformed. Kaya nga, in wet conditions (close to test conditions), tape may not be suitable for use on surfaces such as cup flanges.

Tala 1: May only be interested in tape material as a water vapor barrier. Sa ganitong sitwasyon, the degree of adhesion of the tape to the cup flange will make little difference, so measures need to be taken to prevent any edge effects. These will be mentioned in section 10.

ASTM D3833/D3833M-2019 Standard Test Method for Water Vapor Transport of Pressure Sensitive Tapes

Hakbang 1: Saklaw
1.1 The test method covers a procedure for measuring the water vapor transmittance of a pressure sensitive tape.

1.2 Values expressed in SI units or inch-pound units shall be regarded as standard values respectively. Ang mga halaga na tinukoy sa bawat sistema ay maaaring hindi eksaktong pareho; Kaya nga, ang bawat sistema ay kailangang gamitin nang nakapag iisa at ang mga halaga ay hindi maaaring pagsamahin sa anumang paraan.

1.3 This standard is not intended to address all safety concerns associated with its use. Responsibilidad ng mga gumagamit ng pamantayang ito na magtatag ng angkop na kaligtasan, kalusugan at kapaligiran pagtutukoy at upang matukoy ang pagiging angkop ng mga paghihigpit sa regulasyon bago gamitin.

1.4 Ang internasyonal na pamantayang ito ay batay sa mga prinsipyo ng standardisasyon na kinikilala ng internasyonal na itinatag sa Desisyon sa mga Prinsipyo para sa Pag unlad ng mga Internasyonal na Pamantayan, Mga Patnubay at Rekomendasyon na inisyu ng WTO Technical Barriers sa Trade (TBT) Komite.

2. Sumangguni sa file
Pamantayan ng ASTM

D996 Packaging at pamamahagi ng mga tuntunin sa kapaligiran

D3715 / D3715M presyon sensitibong tape kalidad pagtitiyak pagsasanay

D4332 Practice of regulating containers, packaging or packaging components for testing

E96 / E96M test method for water vapor transmittance of materials

E122 Practice of calculating sample sizes to estimate average values of batch or process features with specified precision