A similar process, using a hole ( a spinneret ) instead of a slit, is used to make a fibre called rayon.
22.
Synthetic fibers are made by forcing a thick solution of polymerized chemicals through spinneret nozzles and hardening the resulting filament in a chemical bath.
23.
Extrusion of the polymer and solvent through the spinneret can be accomplished either through the use of gas-extrusion or a metered pump.
24.
When forced through the tiny holes in the spinneret, however, the bundles came out on the other side all facing the same direction.
25.
The final instar larva doesn't feed, it only has the spinneret and labial palpus developed, while other mouth parts are absent.
26.
For high molecular weights ( above 100, 000 g / mol ), the polymer can be very difficult to flow through the spinneret.
27.
But first she had to win over the operator of the spinneret, a colander-like device through which polymers are extruded to produce fabric.
28.
Some spiders have a cribellum, a modified spinneret with up to 40, 000 spigots, each of which produces a single very fine fiber.
29.
This solution is pushed out, or extruded, through a device with a specially engineered opening, called a spinneret, and the resulting fiber is rayon.
30.
The most significant factors which affect the fiber size tend to be the feed rate, the molecular weight of the polymer and the diameter of the spinneret.
