Polyethylene composition suitable for hinge parts

By preparing ethylene polymer compositions with specific molecular weight distribution and melt flow index, the problem of the impact of the property differences between polyethylene and polypropylene on the recyclability and polymer pollution of hinge materials was solved, achieving high performance and environmental friendliness of hinge components.

CN122422374APending Publication Date: 2026-07-17SABIC GLOBAL TECHNOLOGIES BV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SABIC GLOBAL TECHNOLOGIES BV
Filing Date
2024-12-17
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

The differences in properties between existing hinge materials, such as polyethylene and polypropylene, affect recyclability, and polymer pollution is difficult to solve. There is a need for a single-material packaging with fatigue resistance, environmental stress cracking resistance, and good processability.

Method used

A polyethylene composition with excellent stiffness, processability and resistance to environmental stress cracking is prepared by using an ethylene polymer composition containing low molecular weight and high molecular weight components and balancing specific molecular weight distribution and melt flow index.

Benefits of technology

This achieves a balance between good processability, environmental stress cracking resistance, and fatigue performance of polyethylene compositions in hinge components, supporting the recyclability and environmental friendliness of single-material packaging.

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Abstract

本发明涉及一种聚乙烯组合物，其包含乙烯聚合物，所述乙烯聚合物包含以下或由以下组成：a)低分子量组分(A)；和b)高分子量组分(B)；其中所述聚乙烯组合物具有：熔体流动指数(MFI21.6)≥140.0且≤185.0 dg / min、优选≥150.0且≤180.0 dg / min、优选≥160.0且≤180.0 dg / min，其根据ISO 1133‑1：2011在190℃确定和在21.6 kg测量；和密度≥956.0且≤965.0 kg / m3、优选≥957.0且≤962.0 kg / m3、优选≥957.0且≤961.0 kg / m3，其根据ISO 1183确定；和在100 rad / s剪切速率下的复数粘度(η100)≥580且≤715 Pa.s、优选≥580且≤700 Pa.s、优选≥585且≤680 Pa.s，其根据ISO 6721‑10在190℃确定；本发明进一步涉及一种包含聚乙烯组合物的制品和聚乙烯组合物用于制造铰链部件的用途。
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Citation Information

Patent Citations

  • Narrow MWD, compositionally optimized ethylene interpolymer composition, process for making the same and article made therefrom

    WO1999014271A1