Raw Material

Our Protective Rubber Grommet compound from world class suppliers or domestic rubber supplier and customized pantone code is available, hardness from 30 to 90 Shore A.

Size

Standard size with our current mold or customized according to your sample or drawing( 2D, 3D drawing , format STP, DWG, PDF , etc)

Quality and Certificate

We execute ISO9001 quality system and our Protective Rubber Grommet With Hole has passed ROHS/Reach/WARS certificate.

Mold and tooling

In house tool making and free of tooling charge for standard rubber grommet, the mould parting line will be sent to customer confirmation.

Management and quality tracking: Strict material traceability under ERP system.

Protective Rubber Grommet process flow

PO confirm---Develop mold according to drawing or sample---Develop chemical formula according to specifications---Mix the raw material as per formula---Prepare and Install the mold on the machine---Preform the rubber compound---Put the compound into mold and vulcanization with certain temperature and pressure---After a while, remove the goods from the mold---Trimming the flash---Inspection---Packing---Shipping

Small MOQ: there’re variety Protective Rubber Grommet in stock, so mini MOQ is acceptable.

Function: protect cable

Payment: T/T, L/C, Credit card. USD, RMB ,Euro and so on other currency is available.

Trade Term: EXW, FOB, CIF etc

Package: poly bag and carton(40*32*25CM). If you need pack by pallet or other customized package, it’s also ok.

Shipping method: By air, by sea, by express, multi-modal transport

The Mooney viscosimeter is used to measure the plasticity of rubber compound. Its testing principle is to measure the shear resistance of the sample to the rotation of the rotor under a certain temperature, time and pressure, and to express the plastic degree of the compound by the difference of the torque.

Mooney viscosity value and plasticity is closely related, high viscosity value, Mooney viscosity mainly affects the processing performance of raw rubber and synthetic rubber, indicating that rubber molecular weight is large, poor plasticity, on the contrary, rubber molecular weight is small, good plasticity.

The test process is to first heat the mold cavity to a constant temperature of (100±1) ℃, and then put the sample into the mold cavity and preheat it for a certain time. Then the viscometer starts to work. When the rotor rotates, observe the scale value of the instrument, and the displayed value is the Mooney viscosity value of the compound, referred to as Mooney viscosity for short. The greater the Mooney viscosity, the higher the viscosity of the compound (that is, the lower the plasticity of the compound >. Mooney viscosity values vary from test condition TO TEST condition, SO THE TEST recording method should INDICATE THE test condition. Typically, the Mooney viscosity is expressed as ML1+4 100 ° C. Among them, M represents menyi, L1+ 4,100 ℃ represents greater trochanter [diameter is 38. 1mm) the torque value measured when it is preheated for 1min and rotated for 4min < its value is indicated by dial indicator >. The range of Mooney viscosity is 0 ~ 200.

The Mooney viscosity reflects the viscosity of the compound under specific conditions and can be directly used as an index to measure the rheological properties of the compound. However, this method can only reflect the rheological properties of the compound at low shear rates because of its slow speed and small shear rate. If the test speed is increased, the results will be closer to the rheological properties in the actual processing.

If the Mooney viscosity is too high, it is not easy to process. If the Mooney viscosity is too low, the tensile strength of the vulcanized products is low, and the performance may not meet the requirements. Reasonable control of the Mooney viscosity value of rubber is conducive to the rubber mixing, rolling, extrusion, injection and molding vulcanization and other processing technology, so that the vulcanized rubber can obtain good physical and mechanical properties.

The Moeney viscosity method is quick and easy to test the plasticity of rubber materials without the need to make standard shape samples. In addition, the method can also be used to measure the coke burning time of the compound (i.e. the diameter is 30. 5mm rotor, rubber preheating at 120℃ for 1min, measured when the Mooney viscosity value drops to the lowest value and then transferred to rise 5 Mooney value time, called coke burning), can timely understand the processing safety of rubber. Therefore, the concept of Mooney viscosity has been widely used in scientific research and production.

Mooney viscosity can basically reflect the degree of polymerization and molecular weight of synthetic rubber. The Mooney viscosity reflects the processing performance of rubber and its molecular weight as well as its distribution range.