When it comes to PTFE tape initial adhesive strength test principle and instruments, we have to say the next standard, for this there is a standard "People's Republic of China standard GB/T4852-2002", the test instrument must meet this standard, only in line with the "People's Republic of China standard GB/T4852-2002" can be used for teflon tape initial adhesive strength test.
PTFE tape manufacturer's initial adhesive strength test works by rolling a steel ball over the adhesive tape on the inclined plate.
According to the size of the steel ball that can be stuck by the viscosity surface of the specified length, the initial viscosity is evaluated.
PTFE tape initial adhesive strength test instrument:
1. Bevel ball rolling device: This device is mainly composed of an inclined plate, a ball feeder, a bracket, a base and a ball receiver box
2. Steel ball: 32 kinds of steel balls with 0 class and diameter of ~1 inch, manufactured from GCr15 bearing steel, with accuracy no less than that specified in GB308-77 "Steel ball", can be used as testing steel ball.
The balls are numbered 32 times their inch diameter.
A continuous set of steel balls with ball numbers shall be used for testing.
The ball shall be stored in anti-rust oil.
The ball with rust or scar must be replaced in time.
3. Technical Indicators:
Adjustable dip Angle :0 ~ 60° Width of mesa :120mm Width of test area :80mm
Standard steel ball: 1/32 inch to 1 inch
Dimensions :320(L)mm×140(B)mm×180(H)mm Weight: 6kg