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EP0348749A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Transparent shrink film based an polypropylene, process for making it and its use for shirkable labels

Assignee: Hoechst AG
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Filing: 1989-06-16
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Granted: —
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Expires: 2009-06-16
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Abstract

Abstract Translated from German Es wird eine neuartige Schrumpffolie beschrieben, die aus wenigstens einer polyolefinischen Schicht besteht enthaltend Polypropylen und einen Harzzusatz. Die Folie besitzt ein Schrumpfvermögen in Querrichtung von mehr als 20 % bei 90 °C und in Längsrichtung von weniger als 8 % ebenfalls bei 90 °C. Die neuartige Folie wird durch Extrusion und anschliessendes Streckorientieren in Längs- und Querrichtung hergestellt, wobei allerdings die Längsstreckung so durchgeführt wird, daß der Wert der Doppelbrechung der längsgestreckten Folie, Δ n, den Bereich 10 bis 13 · 10<->³ nicht übersteigt. A novel shrink film is described which consists of at least one polyolefinic layer containing polypropylene and a resin additive. The film has a shrinkage capacity in the transverse direction of more than 20% at 90 ° C and in the longitudinal direction of less than 8% also at 90 ° C. The novel film is produced by extrusion and subsequent stretch orientation in the longitudinal and transverse directions, although the longitudinal stretching is carried out in such a way that the value of the birefringence of the longitudinally stretched film, Δ n, does not exceed the range 10 to 13 · 10 <-> ³.

Inventors

  • 👤 Gunter Dr. Schlögl
  • 👤 Lothar Dr. Bothe
  • 👤 Günther Crass
  • 👤 Ursula Dr. Murschall
  • 👤 Herbert Dr. Peiffer

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-29 20:56
CPC Classifications
B; B29; B29C; B29C55/00; B29C55/02; B29C55/10; B29C55/12; B29C55/14; B29C55/143; B32; B32B; B32B27/00; B32B27/06; B32B27/08; B32B27/18; B32B27/32; B29K; B29K2023/00; B29K2023/10; B29K2023/12; B29K2995/00; B29K2995/0037; B29K2995/0049; B32B2307/00; B32B2307/40; B32B2307/412; B32B2307/50; B32B2307/51; B32B2307/54; B32B2307/70; B32B2307/732; B32B2307/734; B32B2307/736; B32B2323/00; B32B2323/10; Y; Y10; Y10S; Y10S428/00; Y10S428/91; Y10T; Y10T428/00; Y10T428/24; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826; Y10T428/31504; Y10T428/31855; Y10T428/31909; Y10T428/31913; Y10T428/31924

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