# A New Fluoropolymer for Stronger Wires and Molded Parts

> This patent describes a specific type of plastic, a copolymer made with tetrafluoroethylene and perfluoro(propyl vinyl ether), designed to be easily molded and used in things like electrical wires and compressed parts, thanks to its precise chemical makeup and properties.

- **Patent:** US 12735562
- **Original title:** Copolymer, injection molded body, member to be compressed, and covered wire
- **Granted:** 2026
- **Status:** Active
- **Times cited:** 0
- **Field:** telecommunications, consumer_electronics, automotive, mechanical, materials, semiconductors

## What it does

The patent describes a special plastic called a copolymer. This plastic is made from two main ingredients: tetrafluoroethylene and a small amount of perfluoro(propyl vinyl ether). The key is the exact amount of the perfluoro(propyl vinyl ether) unit, which is between 2.8% and 3.5% by mass of all the monomer units. It also has a specific "melt flow rate" of 31 to 38 g/10 min, meaning it flows easily when melted for manufacturing. Another important feature is that it has very few "functional groups" (50 or less per 10^6 main-chain carbon atoms), which are special chemical bits that can affect how the plastic behaves. This specific combination of properties makes it suitable for injection molded items, parts that need to be compressed, and coatings for electrical wires. For example, this material could be used to create the tough, heat-resistant insulation around a high-performance electrical cable in an airplane.

## What it does NOT cover

- Does not cover copolymers where the perfluoro(propyl vinyl ether) unit content is outside the specific range of 2.8 to 3.5% by mass.
- Does not cover copolymers with a melt flow rate below 31 g/10 min or above 38 g/10 min.
- Does not cover copolymers having more than 50 functional groups per 10^6 main-chain carbon atoms.
- Does not cover copolymers with more than 50 of the specific functional groups listed (e.g., -CF=CF2, -CF2H) per 10^6 main-chain carbon atoms.
- Does not cover general fluoropolymers without these precise compositional and physical property limits.
- Does not cover materials not intended for injection molding, compression, or wire coating applications.

## The clever bit

The innovation lies in precisely controlling the copolymer's composition, specifically the narrow range of perfluoro(propyl vinyl ether) content, the specific melt flow rate, and the very low number of functional groups. This exact combination likely allows for easier processing through injection molding while maintaining the high performance expected of fluoropolymers, which are typically difficult to mold.

## Real-world examples

1. High-performance electrical wire insulation
2. Automotive sensor housings
3. Chemical processing equipment components
4. Medical device parts requiring chemical resistance
5. Seals and gaskets for harsh environments

## Why it matters

Fluoropolymers, like the one described, are crucial for applications requiring high heat resistance, chemical inertness, and excellent electrical insulation. This specific formulation aims to improve processing, particularly through injection molding, while maintaining or enhancing these critical properties. Such materials are vital in demanding environments, ensuring reliability and safety in electronics, automotive, and industrial equipment where standard plastics would fail.

## Frequently asked questions

### What does A New Fluoropolymer for Stronger Wires and Molded Parts cover?

This patent describes a specific type of plastic, a copolymer made with tetrafluoroethylene and perfluoro(propyl vinyl ether), designed to be easily molded and used in things like electrical wires and compressed parts, thanks to its precise chemical makeup and properties.

### When does this patent expire?

This patent is expected to expire on September 15, 2046, when the invention enters the public domain.

### What problem does this patent solve?

Fluoropolymers, like the one described, are crucial for applications requiring high heat resistance, chemical inertness, and excellent electrical insulation. This specific formulation aims to improve processing, particularly through injection molding, while maintaining or enhancing these critical properties. Such materials are vital in demanding environments, ensuring reliability and safety in electronics, automotive, and industrial equipment where standard plastics would fail.

### What does this patent NOT cover?

Does not cover copolymers where the perfluoro(propyl vinyl ether) unit content is outside the specific range of 2.8 to 3.5% by mass.

**Full plain-English explainer:** https://patentbrief.org/patent/us/12735562/copolymer-injection-molded-body-member-to-be-compressed-and-covered-wire

**Original patent:** https://patents.google.com/patent/US12735562

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_Source: PatentBrief — https://patentbrief.org. Patent facts are from public records; the plain-English explanation is PatentBrief's._