scorch time

scorch time

[′skȯrch ‚tīm]
(chemical engineering)
In rubber manufacture, the time during which a rubber compound can be worked at a given temperature before curing begins.
References in periodicals archive ?
The scorch time for the NR/NBR rubber blends with PTFE falls within the specification and the required range of scorch time for respective component of rubber compound.
Benefits of these SP and SP2 products are said to include uniform crosslink density; thinner tear-trim; better hot tear properties; one-pass mixing; increased mold fill; longer extrusion run times; and excellent synergy with coagents for faster cures with more scorch time.
As such, these additives are usually characterized by a scorch time, [t.
Unlike the Mooney, which could only measure rubber viscosity and scorch time (time until the onset of vulcanization), the ODR could also measure cure rate, state of cure, and even reversion, as well.
The scorch time was slightly shorter for the SR/PS/MMT nanocomposite with the hybrid filler weight ratio of 1.
The compounds were carried out in Moving Die Rheometer (MDR;TECHPRO, rheotech MD+) thatmachine to find scorch time, cure time and torque value.
The TDAE oil displays the lowest scorch time as well as the highest cure time at 90% cure (figure 3).
Higher amount of PWL filler enhanced the compounding process by reducing mixing time, curing time, scorch time and induction time.
Scorch time Optimum cure Minimum torque Maximum torque ([ts.
Key statement: A rubber composition for sidewall and a tire having sidewall using thereof as well as a rubber composition for clinch and a tire having clinch using thereof that adjust scorch time and suppress surface bloom, reduce rolling resistance, can obtain sufficient rigidity as sidewall and clinch, and can improve elongation at break and durability is disclosed.
The scorch time was much shorter on the VVO synthesized in the lab (control 3), and decreased when the loading level of accelerator was raised.
They suggested that injection pressure, compound viscosity and scorch time are important variables for the weidline strength of the rubber products.