Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Hot fill process with closures made from bimodal polyethylene compositions

A bimodal polyethylene, sealing lid technology, applied in packaging and other directions, can solve the problem of not showing the final polymer form, etc.

Active Publication Date: 2018-08-03
NOVA CHEM (INT) SA
View PDF49 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the final polymer morphology present in molded closures formed by injection molding or continuous compression molding techniques may not be present when using standardized tests utilizing standardized plates

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hot fill process with closures made from bimodal polyethylene compositions
  • Hot fill process with closures made from bimodal polyethylene compositions
  • Hot fill process with closures made from bimodal polyethylene compositions

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0317] Example 1 (comparative) is made by having a melt index I of 32 g / 10min 2 , 0.951 g / cm 3 The density and the weight average molecular weight Mw / Mn of 2.88 and the sealing cap made of unimodal polyethylene resin made using Ziegler Natta catalyst in the solution olefin polymerization method. This resin is available as a SCLAIR ® 2712 was purchased from NOVA Chemicals Corporation. The GPC curve of this resin is listed in Figure 1A middle.

Embodiment 2

[0318] Example 2 is a sealing cap made of a bimodal polyethylene composition and having a melt index I of 1.5 g / 10 min 2 , 0.953 g / cm 3 Density and weight average molecular weight Mw / Mn of 8.47. The bimodal polyethylene composition used in Example 2 was made using a single site catalyst in a solution olefin polymerization process. Further details regarding the bimodal polyethylene composition used in Example 2 and its method of preparation are disclosed in US Patent 8,962,755, which is hereby incorporated by reference in its entirety. The GPC curve of this resin is listed in Figure 1B middle.

[0319] The polymers used to make the sealing caps in Examples 1 and 2 are shown in Table 1A along with their panel data. Data for the first and second ethylene copolymer components of Example 2 are shown in Table 1B. The sealing caps were formed by injection molding, and the injection molding processing conditions are listed in Table 2. Seal cap dimensions are provided in Table 3...

Embodiment approach A

[0391] Embodiment A. A method of filling a container, the method comprising: adding hot liquid to the container through a container opening, sealing the container opening with a sealing cap comprising a bimodal polyethylene composition, and allowing the hot liquid to communicate with the container. contact with the inner surface of the sealing cap; wherein the bimodal polyethylene composition comprises:

[0392] (1) 10 to 70% by weight of a first ethylene copolymer having a melt index I of less than 0.4 g / 10min 2 ; Molecular weight distribution M less than 2.7 w / M n ; and 0.920 to 0.955 g / cm 3 density; and

[0393] (2) 90 to 30% by weight of a second ethylene copolymer having a melt index I of 100 to 20,000 g / 10min 2 ; Molecular weight distribution M less than 2.7 w / M n and a density greater than but less than 0.967 g / cm of the first ethylene copolymer 3 density of;

[0394] wherein the density of the second ethylene copolymer is less than 0.037 g / cm higher than the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Melt indexaaaaaaaaaa
Densityaaaaaaaaaa
Melt indexaaaaaaaaaa
Login to View More

Abstract

Bimodal polyethylene compositions for use in hot-fill closures and processes.

Description

technical field [0001] The present disclosure relates to a hot-fill method using a closure made from a bimodal polyethylene composition. Background technique [0002] Hot-fill technology is commonly used in the bottling of beverages such as beverages, juices, dairy products, tea, sports drinks and flavored waters. Typically, the material used to package these in hot fill applications is polyethylene terephthalate (PET). PET bottles are lightweight and strong. [0003] A typical hot-fill process involves the following steps. The hot liquid beverage is added to the plastic bottle at elevated temperature, typically about 70 to about 93°C, under positive pressure over a 15 to 30 second interval. The bottle or container is then immediately sealed with a plastic sealing cap and tipped to its side or inverted. Contact of the hot liquid with the closure will sterilize the closure. The inversion may last, for example, about 15 seconds, or a time sufficient to sterilize the inter...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C08L23/06
CPCC08L23/06C08L2203/10C08F2/001C08L2205/025B65B7/28
Inventor X.王
Owner NOVA CHEM (INT) SA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com