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

BOPP (biaxially-oriented polypropylene) special material and'white point '-free BOPP film

A technology of polypropylene and special materials, applied in the field of BOPP film without "white spots" and its special materials, which can solve the problems of a large number of "white spots" easily produced

Pending Publication Date: 2022-07-19
PETROCHINA CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to provide a special material for BOPP polypropylene and a BOPP film without "white spots", so as to solve the problem that a large number of "white spots" are easily produced when the special material for BOPP polypropylene is produced in the prior art.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] (1) Using GRACE601 polypropylene catalyst, dilute the catalyst with mineral oil to a concentration of 30%, and then according to the mass ratio of GRACE601 polypropylene catalyst, triethylaluminum, and diisobutyldimethoxysilane to 1:0.5:3 The proportions of the catalysts were mixed to obtain a Ziegler-Natta catalyst system, and the polymerization activity of the obtained catalyst system was 50kgPP / gCAT.

[0059] The above catalyst is used to catalyze the polymerization of propylene to obtain polypropylene powder. After testing, the ash content of the obtained polypropylene powder is 0.05 g / kgpp and the isotacticity is 96.5%.

[0060] (2) Acid absorber: calcium stearate, the addition amount is 0.5g / kgPP (PP means polypropylene).

[0061] (3) Antioxidant: B215, the dosage is 2g / kgpp.

[0062] The above-mentioned particles manufactured according to the above proportions are added into the extruder, and granulated with polypropylene powder together to obtain a special mate...

Embodiment 2

[0064] (1) Using GRACE601 polypropylene catalyst, dilute the catalyst with mineral oil to a concentration of 30%, and then according to the mass ratio of GRACE601 polypropylene catalyst, triethylaluminum, and diisobutyldimethoxysilane to 1:0.1:1 The ratio of 1 to 2 was mixed to obtain a Ziegler-Natta catalyst system, and the polymerization activity of the obtained catalyst system was 49 kgPP / gCAT.

[0065] The above catalyst is used to catalyze the polymerization of propylene to obtain polypropylene powder. After testing, the ash content of the obtained polypropylene powder is 0.06 g / kgpp and the isotacticity is 96.5%.

[0066] (2) Acid absorber: calcium stearate, the addition amount is 0.3g / kgPP.

[0067] (3) Antioxidant: B225, the dosage is 1.5g / kgpp.

[0068] The above-mentioned particles manufactured according to the above proportions are added into the extruder, and granulated with polypropylene powder together to obtain a special material for BOPP polypropylene.

Embodiment 3

[0070] (1) Using GRACE601 polypropylene catalyst, dilute the catalyst with mineral oil to a concentration of 30%, and then according to the mass ratio of GRACE601 polypropylene catalyst, triethylaluminum, and diisobutyldimethoxysilane to 1:1:10 The ratio of 1 to 2 was mixed to obtain a Ziegler-Natta catalyst system, and the polymerization activity of the obtained catalyst system was 49 kgPP / gCAT.

[0071] Using the above catalyst to catalyze the polymerization of propylene to obtain polypropylene powder, after testing, the ash content of the obtained polypropylene powder is 0.06 g / kgpp, and the isotacticity is 96.7%.

[0072] (2) Acid absorber: calcium stearate, added in an amount of 0.5g / kgPP.

[0073] (3) Antioxidant: B900, the dosage is 4g / kgpp.

[0074] The above-mentioned particles manufactured according to the above proportions are added into the extruder, and granulated with polypropylene powder together to obtain a special material for BOPP polypropylene.

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
Ashaaaaaaaaaa
Ashaaaaaaaaaa
Ashaaaaaaaaaa
Login to View More

Abstract

The invention discloses a special material for BOPP (biaxially-oriented polypropylene) and a BOPP film without white spots, the special material for BOPP comprises polypropylene powder produced by a high-activity Z-N catalyst and an antioxidant additive system, and the antioxidant additive system comprises an antioxidant and an acid acceptor. According to the improved BOPP special material, an antioxidant B215 is adopted, and an acid acceptor is calcium stearate. The polypropylene powder produced by the high-activity catalyst has the characteristic of low ash content, and meanwhile, the organic acid acceptor effectively reduces the agglomeration phenomenon of inorganic particles, so that the generation of white spots in the production process of the BOPP film is eliminated, and the method is particularly suitable for improving the quality of the BOPP special material.

Description

technical field [0001] The invention relates to the field of polypropylene resin production, in particular to a "white spot" free BOPP film and a special material thereof. Background technique [0002] BOPP (biaxially oriented polypropylene) film has good transparency and mechanical properties, and is widely used in food, clothing, cigarette packaging and other fields. In 2019, the demand will reach more than 5 million tons per year. Daqing Petrochemical's T38F, Dalian Petrochemical's T36F, etc. are now mainly developing in the direction of producing high-grade matting films. [0003] In recent years, with the pursuit of packaging refinement and aesthetics, higher requirements have also been placed on BOPP special materials. Among them, the "white spots" on the surface of BOPP film seriously affect the printing, heat sealing and printing of the film. Compounding and other properties have resulted in a significant increase in the scrap rate and a significant reduction in pro...

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): C08L23/12C08K5/098C08J5/18
CPCC08K5/098C08J5/18C08J2323/12C08L23/12Y02P20/52
Inventor 安彦杰姜艳峰吴双李瑞王熺张明强杨国兴葛腾杰闫义彬任鹤
Owner PETROCHINA CO LTD
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com