Prysmian has been granted a patent for a cable that includes a core with a transmissive element and a coating layer made of a coating material. The coating material consists of 70% to 95% recycled linear low density polyethylene (r-LLDPE) and 5% to 30% recycled ethylene-vinyl acetate copolymer (EVA). The cable may also have a skin layer made of r-LLDPE. GlobalData’s report on Prysmian gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on Prysmian, Data center optical networking was a key innovation area identified from patents. Prysmian's grant share as of September 2023 was 64%. Grant share is based on the ratio of number of grants to total number of patents.

Patent granted for a cable with a specific coating material

Source: United States Patent and Trademark Office (USPTO). Credit: Prysmian SpA

A recently granted patent (Publication Number: US11756701B2) describes a cable with a unique coating material composition. The cable includes a core with a transmissive element and a coating layer made of a coating material. The coating material consists of a combination of recycled linear low density polyethylene (LLDPE) and recycled ethylene-vinyl acetate copolymer (EVA). The weight percentages of these materials in the coating material range from 70% to 95% for LLDPE and 5% to 30% for EVA.

The patent also mentions the inclusion of other materials in the coating material. It suggests the addition of a virgin polyethylene homopolymer or copolymer, such as linear low density polyethylene or high density polyethylene, in an amount of 5% to 50% by weight. Additionally, an additional recycled polyethylene homopolymer or copolymer, specifically recycled high density polyethylene, can be added in the same weight percentage range.

To enhance the properties of the coating material, a detackifier is recommended. The detackifier can be present in an amount of 1% to 25% by weight, with a preferred range of 1% to 8%. Examples of suitable detackifiers include talc, kaolin, calcium carbonate, chalk, stearic acid, and stearate.

Carbon black, a common additive in polymer materials, can also be included in the coating material. The suggested amount of carbon black is from 0.5% to 10% by weight.

The patent further describes the cable having a skin layer surrounding and in direct contact with the coating layer. The skin layer is made of a virgin polyethylene material. Its thickness is specified to be from 1% to 20% of the thickness of the coating layer.

This patented cable design offers a unique combination of recycled materials, virgin polymers, and additives to create a coating material with desirable properties. The use of recycled materials contributes to sustainability efforts, while the addition of virgin polymers and additives helps enhance the performance of the cable. The inclusion of a skin layer provides additional protection to the cable. Overall, this patented cable design presents a novel approach to cable manufacturing with potential benefits in terms of cost, performance, and environmental impact.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.