Berry Global Group. has filed a patent for laminates that offer both breathability and puncture resistance. The laminates consist of a nonwoven fabric and a vapor-permeable and liquid impermeable (VPLI) film bonded together with an adhesive layer. The VPLI film has a moisture vapor transmission rate (MVTR) of at least 2000 g/m2/24 hours and/or a puncture resistance of at least 5 N. The patent aims to provide a solution for materials that require both breathability and puncture resistance. GlobalData’s report on Berry Global Group 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 Berry Global Group, Extrusion-based additive manufacturing was a key innovation area identified from patents. Berry Global Group's grant share as of September 2023 was 56%. Grant share is based on the ratio of number of grants to total number of patents.
A recently filed patent (Publication Number: US20230309633A1) describes a laminate that includes a nonwoven fabric and a vapor-permeable and liquid impermeable (VPLI) film bonded together with an adhesive layer. The VPLI film has specific properties, including a moisture vapor transmission rate (MVTR) of at least 2000 g/m2/24 hours and/or a puncture resistance of at least 5 N. The nonwoven fabric can be made up of various layers, such as spunbond, meltblown, carded, or combinations thereof. It can also have a basis weight ranging from 40 to 150 gsm and be composed of fibers like high density polyethylene, ethylene/1-octene copolymer, polypropylene, or a combination of these materials.
The VPLI film in the laminate can be a single layer film with a microporous composition, having a basis weight of 10 to 100 gsm and a total thickness of 10 to 100 microns. The film's composition includes a blend of polyethylenes, such as linear low density polyethylenes (LLDPE), non-linear low density polyethylenes, high density polyethylenes (HDPE), and ethylene/a-olefin copolymers. The VPLI film can also be a multi-layer film with 2 to 8 individual layers, including a microporous layer. The individual layers can have different polymeric compositions, including respective polymer-phases and fillers dispersed throughout.
The patent also describes a method of forming the laminate, which involves bonding the nonwoven fabric to the VPLI film using an adhesive layer. The VPLI film can be a multi-layer film formed through a cast film co-extrusion operation, with each layer formed from a single polymeric source. The method may also include incrementally stretching the laminate or the VPLI film to create micropores within the film.
The laminate described in the patent can be used in various applications, including protective clothing like coveralls, gowns, smocks, pants, headwear, and shoe covers. The combination of the nonwoven fabric and VPLI film provides vapor permeability while preventing liquid penetration, making it suitable for protective garments.
In summary, the patent describes a laminate consisting of a nonwoven fabric and a vapor-permeable and liquid impermeable film bonded together. The laminate can have specific properties, and the nonwoven fabric and VPLI film can be composed of various materials. The patent also outlines a method of forming the laminate and mentions its potential use in protective clothing.
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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.
