Resin forming nozzle device and resin forming method using same

Details Resin forming nozzle device and resin forming method using same Resin forming nozzle device and resin forming method using same

1997-04-21

1999-03-16

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

Orifice for filaments or fibers

425 90, 425225, 425463, B29C 4712

Patent

active

058826904

ABSTRACT:
A resin forming nozzle device is disclosed. This resin forming nozzle device is one in which a surface lubricant having mold release properties is continuously introduced to a nozzle face having the discharge openings of resin extrusion orifices, and comprises a feed section for supplying a surface lubricant from the outside, and one or more grooves formed in positions adjacent to the discharge openings of the nozzle face so that they have a width of 10 to 3,000 .mu.m and a depth of 10 .mu.m or greater and at least one end thereof communicates with the surface lubricant feed section. When a resin is formed by using this nozzle device while supplying thereto a surface lubricant having a viscosity of 0.1 to 1,000 cP during use and a surface tension of 40 dyn/cm or less, neither oligomers of the resin nor degradation products of the surface lubricant accumulate on the nozzle surface. Consequently, stable resin forming can be performed for a long period of time without causing breakage of the filaments.

REFERENCES:
patent: 3056163 (1962-10-01), Deis
patent: 4124666 (1978-11-01), Wilhelm et al.
patent: 4203939 (1980-05-01), Drachenberg et al.
patent: 4301101 (1981-11-01), Bachmann et al.
patent: 4388057 (1983-06-01), Bachmann et al.

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