DE2633837A1 - TRANSPARENT FILMS - Google Patents
TRANSPARENT FILMSInfo
- Publication number
- DE2633837A1 DE2633837A1 DE19762633837 DE2633837A DE2633837A1 DE 2633837 A1 DE2633837 A1 DE 2633837A1 DE 19762633837 DE19762633837 DE 19762633837 DE 2633837 A DE2633837 A DE 2633837A DE 2633837 A1 DE2633837 A1 DE 2633837A1
- Authority
- DE
- Germany
- Prior art keywords
- films
- polyamide
- transparent
- transparent films
- water vapor
- 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.)
- Granted
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
- B29C48/03—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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
- Laminated Bodies (AREA)
- Wrappers (AREA)
Description
Zentralbereich Patente. Marken und LizenzenCentral Patents Department. Trademarks and licenses
509 Leverkusen. Bayerwerk509 Leverkusen. Bayerwerk
str-iz2 7. Juli 1976str-iz2 July 7, 1976
Gegenstand der Erfindung sind transparente Folien aus Polyhexamethylenisophthalamid in einer Dicke von 1O,u bis 1000 ,u.The invention relates to transparent films made of polyhexamethylene isophthalamide in a thickness of 10, u up to 1000, u.
Folien aus 6- und 6,6-Polyamid zeichnen sich durch eine Reihe hervorragender Eigenschaften wie hohe Zähigkeit und Abriebfestigkeit, geringe Gasdurchlässigkeit, gute Bedruckbarkeit und Metallisierbarkeit sowie durch ihren hohen Schmelzpunkt und ihre gute Beständigkeit gegen nichtpolare, organische Lösungsmittel aus. Aufgrund dieser Eigenschaften werden Polyamidfolien als Verpackungsmaterial eingesetzt.Films made of 6- and 6,6-polyamide are characterized by a Range of excellent properties such as high toughness and abrasion resistance, low gas permeability, good printability and metallizability as well as their high Melting point and their good resistance to non-polar, organic solvents. Based on these Properties, polyamide films are used as packaging material.
Von Nachteil sind bei diesen Folien die hohe Durchlässigkeit für Wasserdampf und der hohe Schmelzpunkt der Polyamide. Die hohe Wasserdampf-Durchlässigkeit verbietet eine Verpackung von Lebensmitteln über längere Zeiträume. Die hohe Schmelztemperatur der Polyamide sowie ihre niedrige Schmelzviskosität bedingen eine schlechte Tiefziehfähigkeit und eine schlechte Heißsiegelbarkeit der Folien. Ein weiterer Nachteil insbesondere der Polyamidmonofolien, aber auch der Verbundfolien, ist die große Neigung zum Blocken. Dadurch wird die Verarbeitung der Folien erheblich erschwert.The disadvantages of these films are the high permeability to water vapor and the high melting point of the polyamides. The high water vapor permeability forbids packaging of food for long periods of time. The high melting temperature of the polyamides as well as their low Melt viscosity results in poor deep-drawability and poor heat sealability of the films. Another disadvantage, especially of the polyamide monofilms, but also the Composite films, is the great tendency to block. This makes the processing of the foils much more difficult.
Le A 17 294Le A 17 294
709885/0217709885/0217
Man hat diese Mänge durch den Einsatz von Verbund folien aus Polyamiden und Polyolefinen wie z.B. Polyäthylen zu beheben versucht. So wirkt Polyäthylen als Wasserdampf-, sperre und führt zu einer guten Heißsiegelbarkeit der Verbundfolien. Die Verbundfolien lassen sich aber nur mit beträchtlichem Aufwand herstellen.These shortcomings are achieved through the use of composite foils from polyamides and polyolefins such as polyethylene tried to fix. Polyethylene acts as a water vapor, lock and leads to a good heat sealability of the composite films. However, the composite films can only be produced with considerable effort.
Es wurde nunmehr überraschenderweise gefunden, daß Polyamidfolien aus Polyhexamethy.lenisophthalamid die Nachteile der 6- bzw. 6,6-Polyamidfolien nicht aufweisen, sondern sich in ihrem Permeabilitätsverhalten gegenüber Wasserdampf dem der Verbundfolien annähern.It has now surprisingly been found that polyamide films Polyhexamethy.lenisophthalamid does not have the disadvantages of 6- or 6,6-polyamide films, but rather each other approach that of the composite films in their permeability behavior to water vapor.
Gegenstand der Erfindung sind daher transparente Folien aus Polyhexamethylenisophthalamid mit einer Dicke zwischen 10 und 1G00,u.The invention therefore relates to transparent films made of polyhexamethylene isophthalamide with a thickness between 10 and 1G00, u.
Die Folien bleiben,im Gegensatz zu Folien aus 6- oder 6,6-Polyamid, auch mit zunehmender Schichtdicke transparent. Die Wasserdampfdurchlässigkeit der Folien ist erheblich niedriger als die der bekannten Polyamidfolien. Sie zeichnen sich weiterhin durch gute Tiefziehfähigkeit und verbesserte Heißsiegelfähigkeit aus. Sie zeigen keine Neigung zum Blocken, d.h. keine verminderte Gleitfähigkeit der Folien beim Verarbeiten. Die zur Herstellung der erfindungsgemäßen Folien verwendeten Polyhexamethylenisophthalamide werden nach den bekannten Kondensationsverfähren für Polyamide erhalten. Vorzugsweise werden für die Folienherstellung Polyamide mit einer relativen Viskosität von mindestens etwa 2,3, vorzugsweise 2,5-3,5, gemessen an einer 1%igen Lösung des Polyamids in m-Kresol bei 25°C eingesetzt.In contrast to films made of 6- or 6,6-polyamide, the films remain also transparent with increasing layer thickness. the The water vapor permeability of the films is considerably lower than that of the known polyamide films. You stand out furthermore due to good deep-drawability and improved heat-sealability the end. They show no tendency to block, i.e. no reduced lubricity of the films during processing. Those used to produce the films of the invention Polyhexamethylene isophthalamides are made according to the known condensation processes obtained for polyamides. Polyamides with a relative Viscosity of at least about 2.3, preferably 2.5-3.5, measured in a 1% solution of the polyamide in m-cresol 25 ° C.
Die Herstellung der Folien erfolgt nach bekannten Verfahren
durch Extrusion des Polyamids durch Breitschlitzdüsen auf
handelsüblichen Maschinen, bei Temperaturen von 250 bis 3 2O°C, vorzugsweise von 27O-3OO°C oder nach dem
Folienblasverfahren, wie es z.B. bei Vieweg/Müller, Kunststoff-Handbuch
Bd. VI, Polyamide S. 326 ff (München 1966) beschrieben ist.
Le A 17 294 - 2 -The films are produced according to known processes by extrusion of the polyamide through slot dies on commercially available machines, at temperatures of 250 to 3 2O ° C, preferably from 27O-3OO ° C, or by the blown film process, as is the case, for example, at Vieweg / Müller, Kunststoff- Handbuch Vol. VI, Polyamide S. 326 ff (Munich 1966) is described.
Le A 17 294 - 2 -
709885/0217709885/0217
Die erfindungsgemäßen Folien dienen als Abdeckmaterial/ zur Verpackung von Lebensmitteln und Chemikalien. Tiefgezogene Folien werden beispielsweise zur Herstellung von Verpackungsdosen eingesetzt. The films according to the invention serve as a cover material / for Food and chemical packaging. Deep-drawn foils are used, for example, to manufacture packaging cans.
Le A 17 294 - 3 - Le A 17 294 - 3 -
709885/0217709885/0217
Ein Polyamid aus Isophthalsäure und Hexamethylendiamin mit einer relativen Lösungsviskosität von -v? , = 2,63, gemes-A polyamide made from isophthalic acid and hexamethylenediamine with a relative solution viscosity of -v? , = 2.63, measured
■ "' 6re± ■ - ο ■ sen an einer einprozentigen Lösun'g'ün m-Kresol bei 25 C in einem Ubbelohde-Viskosimeter, wird auf einem Reifenhäuser-Extruder S 30 (L = 20 D) bei 29O°C durch eine 300er Foliendüse extrudiert. Der Film wird über Kühlwalzen mit einer Temperatur von 95°C abgezogen. Die Dicke der Folien beträgt 50,u. Die Folien sind transparent und lassen sich problemlos auf handelsüblichen Folienschweißgeraten verschweissen. Die Folien zeigen keine Neigung zum Blocken. Die Wasserdampfdurchlässigkeit, gemessen nach DIN 53122 bei 85 % relativer Feuchte und einer mittleren Meßtemperatur von 23 C beträgt 7,6 g-m «d . ■ "'6re ± ■ - ο ■ sen on a one percent solution m-cresol at 25 C in an Ubbelohde viscometer, on a Reifenhäuser extruder S 30 (L = 20 D) at 29O ° C through a 300 mm film nozzle. The film is drawn off over cooling rollers at a temperature of 95 ° C. The thickness of the films is 50 u. The films are transparent and can be easily welded on commercially available film sealing devices. The films show no tendency to block. The water vapor permeability , measured according to DIN 53122 at 85% relative humidity and an average measuring temperature of 23 C is 7.6 gm «d.
Im Vergleich dazu beträgt die Wasserdampfdurchlässigkeit von bekannten Polyamidfolien: ■In comparison, the water vapor permeability of known polyamide films is: ■
-2-1 6 -Polyamid (40,u) 35 g«m «d-2-1 6 -Polyamide (40, u) 35 g «m« d
6,6-Polyamid (40,u) 17 g-m~2-d~1. und bekannten Verbundfolien aus6,6-polyamide (40, u) 17 gm ~ 2 -d ~ 1 . and known composite films
6—Polyamid und Polyäthylen (9OyU) 2,3 g«m~2-d~1 6 — polyamide and polyethylene (9OyU) 2.3 g «m ~ 2 -d ~ 1
Unter den in Beispiel 1 beschriebenen Extrusionsbedingungen wird eine Folie in einer Schichtdicke von 450,u hergestellt. Die Folie ist transparent. Sie läßt sich nach einer Vorheizzeit von 90 s ohne Schwierigkeiten zu fehlerfreien quaderförmigen oder halbkugelförmigen Dosen von ca. 6 cm Höhe tiefziehen. Under the extrusion conditions described in Example 1, a film with a layer thickness of 450 μm is produced. The film is transparent. After a preheating time of 90 s, it can be thermoformed into flawless cuboid or hemispherical cans of about 6 cm in height without difficulty.
Le A 17 294 „ ^«4» « r , « Λ - « ORIGINAL INSPECTEDLe A 17 294 "^" 4 "" r , " Λ -" ORIGINAL INSPECTED
7ff9%85/02177ff9% 85/0217
» v»-j» «.< u.t; wZ Ii"V" -j "". < u.t; wZ II
Claims (1)
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2633837A DE2633837C2 (en) | 1976-07-28 | 1976-07-28 | Transparent foils |
| FI772278A FI772278A (en) | 1976-07-28 | 1977-07-26 | |
| IT50429/77A IT1079369B (en) | 1976-07-28 | 1977-07-26 | TRANSPARENT SHEETS AND PROCEDURE TO PRODUCE THEM |
| CH922777A CH628361A5 (en) | 1976-07-28 | 1977-07-26 | Transparent films |
| JP8888377A JPS5316071A (en) | 1976-07-28 | 1977-07-26 | Transparent film |
| BE179669A BE857200A (en) | 1976-07-28 | 1977-07-27 | TRANSPARENT POLYHEXAMETHYLENE-ISOPHTALAMIDE FILMS |
| GB31545/77A GB1558529A (en) | 1976-07-28 | 1977-07-27 | Transparent polyamide films |
| SE7708623A SE422069B (en) | 1976-07-28 | 1977-07-27 | TRANSPARENT POLYAMIDE FILM AND SET TO MAKE FILM |
| NL7708387A NL7708387A (en) | 1976-07-28 | 1977-07-28 | PROCESS FOR PREPARING TRANSPARENT FILMS AS WELL AS TRANSPARENT FILMS OBTAINED ACCORDING TO THE PROCESS. |
| FR7723306A FR2359872A1 (en) | 1976-07-28 | 1977-07-28 | TRANSPARENT POLYHEXAMETHYLENE-ISOPHTALAMIDE FILMS |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2633837A DE2633837C2 (en) | 1976-07-28 | 1976-07-28 | Transparent foils |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE2633837A1 true DE2633837A1 (en) | 1978-02-02 |
| DE2633837C2 DE2633837C2 (en) | 1983-07-14 |
Family
ID=5984110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2633837A Expired DE2633837C2 (en) | 1976-07-28 | 1976-07-28 | Transparent foils |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5316071A (en) |
| BE (1) | BE857200A (en) |
| CH (1) | CH628361A5 (en) |
| DE (1) | DE2633837C2 (en) |
| FI (1) | FI772278A (en) |
| FR (1) | FR2359872A1 (en) |
| GB (1) | GB1558529A (en) |
| IT (1) | IT1079369B (en) |
| NL (1) | NL7708387A (en) |
| SE (1) | SE422069B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4844987A (en) * | 1985-10-29 | 1989-07-04 | Teijin Limited | Polyamide molding material and hollow-molded body obtained therefrom |
-
1976
- 1976-07-28 DE DE2633837A patent/DE2633837C2/en not_active Expired
-
1977
- 1977-07-26 JP JP8888377A patent/JPS5316071A/en active Pending
- 1977-07-26 IT IT50429/77A patent/IT1079369B/en active
- 1977-07-26 FI FI772278A patent/FI772278A/fi not_active Application Discontinuation
- 1977-07-26 CH CH922777A patent/CH628361A5/en not_active IP Right Cessation
- 1977-07-27 GB GB31545/77A patent/GB1558529A/en not_active Expired
- 1977-07-27 SE SE7708623A patent/SE422069B/en unknown
- 1977-07-27 BE BE179669A patent/BE857200A/en not_active IP Right Cessation
- 1977-07-28 NL NL7708387A patent/NL7708387A/en not_active Application Discontinuation
- 1977-07-28 FR FR7723306A patent/FR2359872A1/en active Granted
Non-Patent Citations (1)
| Title |
|---|
| Kunststoff-Handbuch Bd. VI, München 1966, Vieweg/Müller, S.326 ff * |
Also Published As
| Publication number | Publication date |
|---|---|
| NL7708387A (en) | 1978-01-31 |
| IT1079369B (en) | 1985-05-08 |
| FI772278A (en) | 1978-01-29 |
| CH628361A5 (en) | 1982-02-26 |
| FR2359872A1 (en) | 1978-02-24 |
| JPS5316071A (en) | 1978-02-14 |
| SE422069B (en) | 1982-02-15 |
| SE7708623L (en) | 1978-01-29 |
| BE857200A (en) | 1978-01-27 |
| GB1558529A (en) | 1980-01-03 |
| FR2359872B1 (en) | 1983-04-29 |
| DE2633837C2 (en) | 1983-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8110 | Request for examination paragraph 44 | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8339 | Ceased/non-payment of the annual fee |