MX9707411A - Procedimiento de empleo de una materia termopl??stica semicristalina. - Google Patents
Procedimiento de empleo de una materia termopl??stica semicristalina.Info
- Publication number
- MX9707411A MX9707411A MX9707411A MX9707411A MX9707411A MX 9707411 A MX9707411 A MX 9707411A MX 9707411 A MX9707411 A MX 9707411A MX 9707411 A MX9707411 A MX 9707411A MX 9707411 A MX9707411 A MX 9707411A
- Authority
- MX
- Mexico
- Prior art keywords
- temperature
- semi
- percent
- thermoplastic matter
- crystalline thermoplastic
- Prior art date
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
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31—Surface property or characteristic of web, sheet or block
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31855—Of addition polymer from unsaturated monomers
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Un procedimiento de empleo de una materia termoplástica semicristalina, que comprende sucesivamente las etapas siguientes: (1) una pieza extruida de materia termoplástica semicristalina en fusion de enfría a una temperatura T1 superior a la temperatura de cristalizacion de la materia termoplástica (Tc) e inferior a Tf+5 degree C, donde Tf designa la temperatura de fusion de la materia termoplástica; (2) seguidamente de la extruida se estira en estado fundido; (3) seguidamente se deja relajar la pieza extruida, a una temperatura T3 comprendida entre Tc y Tf, durante un periodo de tiempo al menos igual al tiempo medio de relajacion (t3) de la materia termoplástica a la temperatura de relajacion y después del estiramiento; (4) seguidamente la pieza extruida de templa a una temperatura T4 inferior a Tc. En particular, este procedimiento permite fabricar una película cosntruida esencialmente por al menos un homopolímero del propileno, de un espesor de 100 a 250 æm, que presenta una contraccion de caliente de a lo sumo 20%, una turbidez inferior o igual a 3% y una transparencia total con respecto al aire superior, a 70%.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| BE9600819A BE1010654A3 (fr) | 1996-09-30 | 1996-09-30 | Procede de mise en oeuvre d'une matiere thermoplastique semi-cristalline. |
| BE09600819 | 1996-09-30 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MX9707411A true MX9707411A (es) | 1998-08-30 |
| MXPA97007411A MXPA97007411A (es) | 1998-11-12 |
Family
ID=
Also Published As
| Publication number | Publication date |
|---|---|
| BE1010654A3 (fr) | 1998-11-03 |
| ES2169836T3 (es) | 2002-07-16 |
| DE69709007D1 (de) | 2002-01-24 |
| ATE210550T1 (de) | 2001-12-15 |
| DE69709007T2 (de) | 2002-08-14 |
| US6174479B1 (en) | 2001-01-16 |
| EP0832730B1 (fr) | 2001-12-12 |
| EP0832730A1 (fr) | 1998-04-01 |
| DK0832730T3 (da) | 2002-04-08 |
| US6391432B1 (en) | 2002-05-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG | Grant or registration | ||
| GB | Transfer or rights | ||
| PD | Change of proprietorship |
Owner name: SOLVAY INDUSTRIAL FOILS MANAGEMENT AND RESEARCH (S |
|
| MM | Annulment or lapse due to non-payment of fees |