Title:
射出成形法
Document Type and Number:
Japanese Patent JP4620260
Kind Code:
B2
Abstract:
A process for the manufacture of thin-walled articles comprising the steps o f: 1) selecting a polymer blend having an ESCR of greater than 10 hours; i) a plurality (preferably 6 or more) of strips of the polyme r blend incorporating any post moulding treatment intended for the final article having the cross-sectional dimensions of 0.65 mm in thickness and 10 mm in width are injection moulded under high shear, long flow length conditions, similar to those intended for use in the manufacture of the flexible thin-walled article; ii) the strips are bent back upon themselves and stapled 3 mm from the bend; iii) the bent strips ar e immersed in a solution of a stress crack agent and held at a temperature of 50 .degree.C; iv) the strips are observed for signs of cracking, any signs of cracking are regarded as a failure; and v) the time to failure is when 50 % of the strips show signs of cracking; 2) melting sai d polymer blend; 3) ramming the molten polymer blend into a mould, said mould having a cavity which produces a thin-walled article havin g a thin section less than 1 mm in thickness and wherein the thin section is substantially continuous for greater than 50 mm in the direction of flow of the molten polymer blend in the mould; and 4) removing from the mould the thin-walled article formed fromthe polymer blend .
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Inventors:
Ian Aude Michael Jakobs
Application Number:
JP2000618712A
Publication Date:
January 26, 2011
Filing Date:
April 14, 1998
Export Citation:
Assignee:
Ian Aude Michael Jacobs
International Classes:
B29C45/00; B65D35/08; B29C45/02; B29D23/20; B65D35/12; B65D35/22; B65D35/24; B65D35/36; B65D35/44; C08L23/02; B29C45/14; B29K23/00; B29L23/20
Domestic Patent References:
| JP3226462A | ||||
| JP4158017A | ||||
| JP8104784A | ||||
| JP8245728A | ||||
| JP3139542A | ||||
| JP2504167A | ||||
| JP55042841A |
Attorney, Agent or Firm:
Kenji Sugimura
Kazuyuki Tomita
Kazuyuki Tomita