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Laminated multilayer films

A multi-layer film, laminated film technology, applied in the direction of layered products, synthetic resin layered products, chemical instruments and methods, etc., can solve problems such as density reduction and damage to mechanical properties

Inactive Publication Date: 2010-01-06
BOREALIS TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, the reduced density can in turn compromise the mechanical properties of the final membrane

Method used

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  • Laminated multilayer films

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0120] Preparation of LLDPE

[0121] LLDPE suitable as layer material in laminate (i) and substrate (ii) according to the invention may be any conventional, for example commercially available polymer component. Such LLDPE is obtained eg from Borealis and other PE producers / suppliers. The following technical grades of LLDPE are given as examples only, without limitation to them: for example some grades from Borealis, e.g. Class FBXXXX, eg FB2310 or FB2230 etc. can be mentioned as possible multimodal LLDPEs for at least layer (A) and optional layers if present such as layer (B); and some grades available from Borealis or from Reliance, such as Indothene from Reliance LL20FS010 may be mentioned as LLDPE which may be used as transparent LLDPE material eg in layer (C) and / or optional layers such as layer (B) eg in transparent embodiments of the invention.

[0122] Alternatively, suitable LLDPE polymer components may be produced according to or in analogy to conventional poly...

Embodiment 1

[0218] Embodiment 1: znLLDPE1 (hereinafter also referred to as LLDPE1)

[0219] The multimodal znLLDPE1 polymer used in the membranes of the inventive examples was prepared as follows: The multimodal znLLDPE polymer was prepared in a pilot scale multistage reactor system comprising a loop reactor and a gas phase reactor. A pre-polymerization step is performed prior to the actual polymerization step. The pre-polymerization stage is at 50dm 3 Carried out in a slurry in a loop reactor at a temperature of about 80° C. and a pressure of about 65 bar, using a polymerization catalyst prepared according to Example 1 of WO 2004 / 000902 and using triethylaluminum as cocatalyst. The molar ratio of aluminum of the promoter to titanium of the catalyst was about 20. Ethylene was fed in the ratio (200 g C2) / (1 g catalyst). Use propane as a diluent to reduce the MFR of the prepolymer 2 Hydrogen was fed in an amount adjusted to about 10 g / 10 minutes. The resulting slurry was transferred to...

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Abstract

The present invention provides laminated multilayer films comprising a multilayer film laminate on a substrate, wherein said multilayer film laminate comprises a multimodal polyethylene (PE) composition. The invention is further directed to a process for producing such laminated multilayer films as well as to articles comprising said laminated multilayer films.

Description

technical field [0001] The present invention relates to laminated multilayer films comprising a multilayer film laminate on a substrate, wherein the multimodal film laminate comprises a multimodal polyethylene (PE) component. The invention also relates to methods of producing such laminated multilayer films and articles comprising said laminated multilayer films. Background technique [0002] Multimodal polyethylene polymers are easy to process due to their broad molecular weight distribution. Multimodal PE is therefore an ideal material for many end uses including film applications. Unfortunately, increasing the molecular weight and broadening the molecular weight distribution to improve processability has a negative impact on optical properties, which is a disadvantage in film applications such as multimodal PE polymers. The resulting films are often hazy and have impaired clarity. [0003] PE produced by low pressure polymerization using metallocene catalysts (mPE) has...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/32
CPCB32B27/322B32B27/32
Inventor 尚沙尔·达斯古普塔
Owner BOREALIS TECH OY