Matte Polyester Film Using Chemically Recycled Electrostatic Pinning Chips
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Solution Overview
Problem
Current PET recycling methods primarily rely on physical recycling, limiting the incorporation of functional components like electrostatic pinning agents, resulting in low usage rates of recycled PET chips and failing to meet environmental standards for eco-labels, thus necessitating additional virgin PET chips and complicating recycling loops.
Innovation Solution
A method involving both physical and chemical recycling of PET materials to produce a matte polyester film, where chemically recycled electrostatic pinning polyester chips with metal salts are integrated, along with matting additives, to enhance the film's properties and reduce virgin PET chip usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If physical recycling method is used for PET plastics, then the manufacturing process is simple and easy to operate, but functional components cannot be added and the usage rate of recycled PET chips decreases
Solution Approach 1:
The patent applies chemical recycling methods to change the chemical parameters and molecular structure of recycled PET chips, enabling them to regain functionality and acceptability for high-value applications. This transforms the physical state and chemical properties of the recycled material, allowing functional components to be reintegrated while maintaining manufacturing feasibility.
Solution Approach 2:
The patent creates composite material systems by combining chemically recycled PET chips with functional components and additives. This composite approach allows the integration of multiple functionalities (mechanical strength, electrostatic properties, matting effects) within a single recycled material system, increasing the usage rate and value of recycled PET chips.
2Ease of operation
If physical recycling is used, then processing is straightforward, but functional components like electrostatic pinning agents cannot be incorporated
Solution Approach 1:
Chemical recycling processes fundamentally change the molecular parameters of PET chips through depolymerization and repolymerization. This parameter transformation enables the material to accept and integrate functional components such as electrostatic pinning agents, matting additives, and colorants that are essential for diverse applications, while maintaining operational feasibility through standardized chemical processing protocols.
Solution Approach 2:
The patent applies local quality enhancement by selectively adding functional components to specific regions or phases of the recycled PET material during chemical recycling. This allows different functional properties (electrostatic pinning, matting, coloring) to be incorporated at different stages or locations within the material processing stream, maximizing versatility while maintaining processability.
3Ease of manufacture
If low usage rate of recycled PET chips is accepted, then manufacturing is easier, but environmental standards and eco-label requirements cannot be met
Solution Approach 1:
Chemical recycling transforms the quality parameters of PET chips to match or exceed virgin material specifications. This parameter enhancement enables high usage rates of recycled content (70-100%) while maintaining product performance and meeting environmental standards for eco-labels, thereby reconciling manufacturing ease with environmental compliance.
Solution Approach 2:
The patent replaces mechanical/physical recycling methods with chemical recycling processes. This substitution enables thorough purification, degradation of contaminants, and reconstruction of polymer chains, producing recycled PET chips of such high quality that they can be used at high rates without compromising environmental standards or product performance.
4Adaptability or versatility
If virgin PET chips are used to add functional components, then functional requirements are met, but the recycling loop is complicated and usage rate of recycled chips decreases
Solution Approach 1:
The patent merges the functions of functional component addition with the chemical recycling process itself. By integrating electrostatic pinning agents, matting additives, and colorants directly into the chemical recycling stream, the patent eliminates the need for separate mixing steps with virgin materials, simplifying the recycling loop while maintaining full functional versatility.
Solution Approach 2:
The chemical recycling process is designed as a universal platform that can handle various types of PET waste and simultaneously incorporate multiple functional components in a single integrated process. This multi-functionality eliminates the need for separate processing lines for different functional requirements, reducing overall system complexity while maximizing recycled chip usage.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enables the production of a highly recycled polyester film with improved properties, reducing virgin PET chip requirements and addressing environmental concerns by maximizing the usage of recycled materials while achieving the necessary film characteristics for applications like packaging and optical films.
Implementation Method 1
The chemically recycled electrostatic pinning polyester chips contain at least one kind of electrostatic pinning additives, and the electrostatic pinning additives are metal salts
Implementation Method 2
adding a matting additive to the recycled polyester material, so that the polyester film that is finally formed includes the matting additive
Data Source
AI summary
A matte polyester film and a method for manufacturing the same are provided. The matte polyester film includes a physically recycled polyester resin and a chemically recycled polyester resin. The physically recycled polyester resin is formed by a plurality of physically recycled polyester chips. The chemically recycled polyester resin is formed by a plurality of chemically recycled polyester chips and mixed with the physically recycled polyester resin. The plurality of chemically recycled polyester chips further include chemically recycled electrostatic pinning polyester chips. The chemically recycled electrostatic pinning polyester chips contain electrostatic pinning additives, and the electrostatic pinning additives are metal salts. Expressed in percent by weight based on a total weight of the polyester film, a content of the electrostatic pinning additives in the polyester film is between 0.005% and 0.1% by weight. The matte polyester film further includes a matting additive.