Polyethylene for protective film and method for producing the same
By developing high-pressure low-density polyethylene ethylene polymers with specific molecular weight distribution and structural characteristics, the problem of difficult to obtain a protective film with high transparency and low fish eyes under various conditions in the prior art is solved, and the film effect of small fish eyes and high transparency is achieved.
JP2025043186APending Publication Date: 2025-03-28SUMITOMO CHEM CO LTD
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Patent Information
- Application Number
- JP2023150564
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-09-15
- Publication Date
- 2025-03-28
AI Technical Summary
Technical Problem
The prior art is difficult to obtain a protective film with high transparency and low fisheye (FE) under various film processing conditions.
Method used
A high-pressure low-density polyethylene (LDPE) ethylene polymer has been developed with specific molecular weight distribution, light scattering area value (RLS) and branching parameter differences (Δg'), as well as specific radioactivity-relaxation time and oxidation induction time.
Benefits of technology
By optimizing the molecular structure of the polymer, a protective film with small fish eyes and high transparency is achieved, which improves the wide range of application and processing convenience of the film.
✦ Generated by Eureka AI based on patent content.
Abstract
To provide an ethylene-based polymer and a method for producing the same, which achieve further improvement in the balance of reduced fish-eyes and superior transparency.SOLUTION: An ethylene-based polymer has a light scattering area value (RLS) of 350 or more and 540 or less. (RLS indicates the light scattering area value of a solution in which 40 mg±0.2 mg of the ethylene-based polymer is dissolved in 20 mL±0.1 mL of ortho-dichlorobenzene).SELECTED DRAWING: None
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