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

Propylene/Ethylene Copolymer Films for Heat Sealing

A random copolymer, ethylene technology, used in lining/interior coating, other chemical processes, transportation and packaging, etc., can solve problems affecting sealing parameters, hardness and gloss reduction, etc., to achieve improved optical properties, low hot tack Effect of initiation temperature, improved optical properties

Active Publication Date: 2017-10-24
WR GRACE & CO CONN
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, if a technician adds more ethylene to a propylene / ethylene random copolymer, toughness and haze are improved while hardness and gloss are reduced
Likewise, too much ethylene can adversely affect sealing parameters such as heat seal initiation temperature and / or hot tack initiation temperature
Conversely, when the ethylene content in propylene / ethylene random copolymer resins is reduced, hardness is improved while toughness and optical properties are adversely affected

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
  • Propylene/Ethylene Copolymer Films for Heat Sealing
  • Propylene/Ethylene Copolymer Films for Heat Sealing
  • Propylene/Ethylene Copolymer Films for Heat Sealing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0134] 2. Embodiment 1 and comparative sample 7

[0135] A. Example 1 - Synthesis of SPAD-containing procatalyst compositions

[0136] 351 g of mixed magnesium / titanium halide alkoxide were stirred in a mixture of 1.69 kg chlorobenzene and 4.88 kg titanium(IV) chloride at ambient temperature. After 10 minutes, a solution of 164.5 g of 5-tert-butyl-3-methyl-1,2-phenylene dibenzoate in 750 mL of chlorobenzene was added, followed by 0.46 kg of chlorobenzene. The mixture was stirred at 100°C for 60 minutes, allowed to stand, and then filtered at 100°C. The solid was stirred in 3.16 kg chlorobenzene at 70°C for 15 minutes, allowed to stand, then filtered at 70°C. The solid was stirred in a mixture of 2.36 kg chlorobenzene and 4.84 kg titanium(IV) chloride and after 10 minutes 109.7 g of 5-tert-butyl-3-methyl-1,2-phenylene dibenzoate were added Solution in 416 g chlorobenzene, followed by 0.20 kg chlorobenzene. The mixture was stirred at 105-110°C for 30 minutes, allowed to stan...

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 flow indexaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The present application provides compositions, films, articles comprising propylene / ethylene random copolymers and substituted phenylene aromatic diesters. Polymerization using the improved catalyst system increases the amount of ethylene incorporated into the backbone of the propylene / ethylene random copolymer, which results in improved thermal properties, improved optical properties and improved heat seal properties.

Description

Background of the invention [0001] The present application provides compositions, films and articles comprising propylene / ethylene random copolymers. [0002] Optical performance, toughness, hardness and seal strength are important performance requirements for packaging. Current propylene / ethylene random copolymers provide optimum properties at the expense of other properties. Generally, if a technician adds more ethylene to a propylene / ethylene random copolymer, toughness and haze are improved while hardness and gloss are reduced. Likewise, too much ethylene can adversely affect sealing parameters such as heat seal initiation temperature and / or hot tack initiation temperature. Conversely, when the ethylene content in the propylene / ethylene random copolymer resin is reduced, hardness is improved while toughness and optical properties are adversely affected. [0003] There is a recognized need in the art for propylene / ethylene random copolymers having improved hardness while...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08F4/646C08F4/649C08F4/651C08F210/06C08J5/18
CPCC08F210/06C08J5/18C08J2323/08Y10T428/31938C08F4/651C08F210/16C08F2500/26B32B27/08B65D25/14C09K3/1006
Inventor L-M.陶C-J.周J.卡托P.S.马丁W.G.希尔德
Owner WR GRACE & CO CONN
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