What are the characteristics of wound patch? Shenzhen pe packaging film

What are the characteristics of wound patch, such as stickiness, tension retention, permanent deformation, elastic recovery and puncture resistance test items? Let's take a look together.

1. Stickiness: the adhesion between two layers of wound films in a stretched or unstretched state.

2. Elastic recovery: The rolled film stays in this state for a period of time after being stretched to a certain proportion, and the ratio of the recovered size to the original size after being released is expressed as a percentage.

3. Permanent deformation: the ratio of the increased length of the wound film to the original length after stretching a certain proportion, expressed as a percentage. F force value: the maximum tension of the wound film at a predetermined elongation.

4. Tension retention rate: the ratio of tension to F force value of the wound film maintained in this state for a period of time is maintained as a percentage. ?

5. Puncture resistance: used to indicate the ability of wound membrane to resist acupuncture. It is expressed by the force value when the membrane breaks and the displacement when it passes through.

6. Light transmittance and haze: The wound film needs good transparency in use. The test method is GB/T 24 10- 1980 "Test Method for Transparency and Haze of Transparent Plastics". At present, most domestic production enterprises also adopt this standard for assessment. Ming' an packaging