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Patent EP0452814A1 successfully refreshed from Google Patents.
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EP0452814A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Method of forming a plastic plate

Assignee: Mitsubishi Chemical Corp
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Filing: 1991-04-11
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Granted: —
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Expires: 2011-04-11
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Abstract

Abstract A method of forming a plastic plate comprising melt extruding a thermoplastic resin containing a flake-like inorganic filler with an extruder (1,1') into a former (3) while a back pressure is applied to the extruded thermoplastic resin to thereby form it into a plate like body, wherein the molten resin is extruded from at least one extruder (1) into a channel or channels (21,22) corresponding to the extruders which are formed in an adapter (2), the molten resin is fed to a cavity having at least one partition plate (311"), formed in the former (3) which is communicatively connected to the adapter (2) so that a molten resin stream or streams introduced from the channel or channels (21,22) are respectively divided and developed into at least two plate like bodies, the plate-like bodies are merged in an overlapping state, followed by heat-bonding them.

Inventors

  • 👤 Tatsuya Mitsubishi Plastics Ind.Ltd. Hayashi
  • 👤 Takao Mitsubishi Plastics Ind.Ltd. Yamagishi

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-08 15:58
CPC Classifications
B; B29; B29C; B29C48/00; B29C48/25; B29C48/88; B29C48/90; B29C48/906; B29C48/022; B29C48/16; B29C48/18; B29C48/21; B29C48/36; B29C48/49; B29C48/03; B29C48/07; B29C48/08; B29C48/30; B29C48/32; B29C48/911; B29C48/9135; B29K; B29K2105/00; B29K2105/06

Claims Analysis

Total Claims: 2
Claim 1
Independent Claim 128 words
A method of forming a plastic plate comprising melt-extruding a thermoplastic resin containing a flake-like inorganic filler with an extruder into a former while a back pressure is applied to the extruded thermoplastic resin to thereby form it into a plate-like body, said method being characterized by introducing the molten resin extruded from the extruder into a channel formed in an adapter; feeding the molten resin to a cavity having at least one partition plate, formed in the former which is communicatively connected to the adapter so that the molten resin introduced from the channel is divided and developed into at least two plate-like bodies; merging the plate-like bodies in the former in an overlapping state; and heat-bonding the interlayer of the overlapping plate-like bodies in the former.
Claim 2
Independent Claim 119 words
A method of forming a plastic plate comprising melt-extruding a thermoplastic resin with a plurality of extruders into a former while a back pressure is applied to the extruded thermoplastic resin, said method being characterized by comprising communicatively connecting the extruders to a single adapter; introducing the molten resin supplied from each of the extruders into channels formed independently in the adapter; feeding the molten resin supplied from the respective channels to a cavity formed in the former which is communicatively connected to the adapter so that the streams of molten resin introduced from the respective channels are developed into plate-like bodies; merging the plate-like bodies in an overlapping state; and heat-bonding the interlayer of the overlapping plate-like bodies.

References Cited (Backward Citations)

EP0225500A2 Cited
EP0315304A1 Cited
US4880370A Cited

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