GB819396A - Improvements in or relating to extruded hollow, elongated shapes of solid polyethylene - Google Patents
Improvements in or relating to extruded hollow, elongated shapes of solid polyethyleneInfo
- Publication number
- GB819396A GB819396A GB13782/57A GB1378257A GB819396A GB 819396 A GB819396 A GB 819396A GB 13782/57 A GB13782/57 A GB 13782/57A GB 1378257 A GB1378257 A GB 1378257A GB 819396 A GB819396 A GB 819396A
- Authority
- GB
- United Kingdom
- Prior art keywords
- article
- relating
- heating
- solid polyethylene
- extruded hollow
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A method of moulding hollow elongated articles e.g. tubes, of polyethylene &c. comprises extruding the molten material and quenching it to a stable form and thereafter heating the external surface of the article to a temperature and for a sufficient time to relax the material to the substantially same extent as an annealed object of the same material. The method increases the strength of the article. The heating may be to a temperature sufficient to melt the external surface of the article and may be from 5 DEG C. to 10 DEG C. and up to 50 DEG C. above the melting point of the resin. Tables of heating times and temperatures are given showing the resulting increase in tensile strength. Specifications 471,590 [Group IV], 639,306 and 682,420 [both in Group IV(a)] are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US819396XA | 1956-06-04 | 1956-06-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB819396A true GB819396A (en) | 1959-09-02 |
Family
ID=22167372
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB13782/57A Expired GB819396A (en) | 1956-06-04 | 1957-04-30 | Improvements in or relating to extruded hollow, elongated shapes of solid polyethylene |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB819396A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2462254A1 (en) * | 1979-07-25 | 1981-02-13 | Rhone Poulenc Ind | Biaxial orientation of freshly extruded polyester tubing - to make stiff tough packaging tubes, involves chilling surface to amorphous state |
-
1957
- 1957-04-30 GB GB13782/57A patent/GB819396A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2462254A1 (en) * | 1979-07-25 | 1981-02-13 | Rhone Poulenc Ind | Biaxial orientation of freshly extruded polyester tubing - to make stiff tough packaging tubes, involves chilling surface to amorphous state |
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