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Physical items detected for medical tapes?

Source:www.sumspring.cn   Release time:2017-08-08

Medical adhesive tape products are pure wood pulp, natural materials, non-toxic, non irritating, and has good ventilation performance. The medical packet tape has good flexibility and easy unwinding, convenient operation; suitable for medical units enterprises using sterile cotton bag cross packet. In YY / T 0148-2006 medical tape standard contains some general requirements and special requirements, tape testing instruments Ji'nan sumspring Instrument Co. Ltd. used for the test items recommended:
1. sticky. The standard requires rolling about four times along the length of the sample at about 60 cm/min and holding it 10 min at standard atmospheric pressure. Make a mark line on the sample line, at the hanging end sample per cm width of 0.8 N (80 g) with a heavy force, should be evenly distributed with the entire bandwidth. The steel plate is hung at 36 DEG -38 DEG hot air in the oven is 30 min, the steel plate and the vertical surface is 2 DEG tilt, to prevent the sample plate and stripping, and can make heavy suspension. To meet the above requirements we will use two kinds of equipment, a YGJ-S electronic pressure roller testing machine, to ensure the 60 cm/min (600mm/min) rolling speed, replacing other speed, or artificial form of rolling test results for a greater impact, so need to use special equipment to sample preparation.
In addition, for testing viscous holding devices, we need to use the CHY-HS constant temperature viscosity tester. Medical tape is affixed on the body, so the standard required to test viscosity at 36 DEG -38 DEG in the oven, viscosity is more sensitive to temperature, if the environment at room temperature or low temperature experiment experiment, test results will be different.


CHY-HS constant temperature viscosity tester
                                                                                                          CHY-HS constant temperature viscosity tester



2. peel strength. The standard requires that the test be attached to the center of the clean surface of the stainless steel plate, so that the sides of the sample are parallel to the two long sides of the steel plate. Apply pressure to the paste portion of the sample by roller and roll four times along the length of the specimen at about 60cm/min. Special YGJ-S electronic roller testing machines are also needed here for sample preparation.
The peel strength test machine also need to purchase the appropriate range, degree of force value in the range between the full range of 15% to 85% of the appropriate force measuring instrument, the determination of the required sample from the plate stripping force (force angle of 180 degrees, stripping rate is 270mm/min~330mm/min). Observe the force applied at the first 25mm length, observe the force at each 30mm, and take the average value of the six readings.  Sumspring recommended BLJ-C 180 peel test machine meet the above requirements.


YGJ-S electronic roller testing machine
YGJ-S electronic roller testing machine


BLJ-C 180 degree peeling test machine

BLJ-C 180 degree peeling test machine


3. comfort (extensibility). Medical tape is elastic and can stretch rebound in the situation, how to extend his influence directly the user comfort, sumspring recommend the use of XLW (PC) comfort test -500N intelligent electronic tensile testing machine.


XLW (PC) -500N intelligent electronic tensile testing machine


XLW (PC) -500N intelligent electronic tensile testing machine



4. water vapor transmission. The human body in the use of medical tape in the process of sweat, this part of water through medical tape released into the environment, if not through or impermeable, accumulation of water will affect wound healing, will make people feel uncomfortable. In order to test the water vapor penetration, it is necessary to simulate the actual use environment. The constant temperature and humidity box is needed, and the humidity difference between the two sides of the sample is measured. The weight of the moisture permeable box is measured periodically to judge the water vapor permeability.
5. water resistance. Standard requirements for the use of YY/T 0471.3-2004 contact wound dressings test methods: the third part: water resistance test. The quality of water retention affects the external water, whether it can quickly infiltrate medical tape into the wound surface. Once infiltrated, of course, it can cause wound infections. Sumspring using ZS-02 water resistance test instrument for testing.

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