ES298862A1 - Method of obtaining a thermoplastic material of cellular structure (Machine-translation by Google Translate, not legally binding)
- Google Patents
Method of obtaining a thermoplastic material of cellular structure (Machine-translation by Google Translate, not legally binding)
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.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AT&T Corp
Original Assignee
Western Electric Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Western Electric Co IncfiledCriticalWestern Electric Co Inc
Priority to ES0298862ApriorityCriticalpatent/ES298862A1/en
Publication of ES298862A1publicationCriticalpatent/ES298862A1/en
Method of obtaining a thermoplastic material of cellular structure, which consists of heating the thermoplastic material, to a temperature higher than its softening point, under a pressure of the order of 35 to 175 kg/cm2 of a gas soluble in the thermoplastic material resulting melt, and that essentially saturates it, and in extruding the composition thus obtained to a zone of lower pressure, under conditions such that the molten thermoplastic material becomes supersaturated with respect to said gas; characterized in that the thermoplastic material is heated mixed with a substance divided into discrete particles, in an amount of the order of 0.001 to 0.5%, and better still 0.01 to 0.1% by weight of the thermoplastic material, such being the nature of the substance divided into particles and the conditions, that the temperature of said particulate substance rises with respect to the thermoplastic material in the aforementioned zone of lower pressure, whereby the gas leaving the solution is grouped in the points occupied by the particles. (Machine-translation by Google Translate, not legally binding)
ES0298862A1964-04-091964-04-09Method of obtaining a thermoplastic material of cellular structure (Machine-translation by Google Translate, not legally binding)
ExpiredES298862A1
(en)
A procedure to produce molded articles of partial or completely spongeed thermoplastic material. (Machine-translation by Google Translate, not legally binding)
Method for lubricating the recipient and the mandrel of an extrusion press in the hot extrusion, in the form of metal bars or tubes. (Machine-translation by Google Translate, not legally binding)