Clorox. has filed a patent for a multi-film thermoplastic structure, specifically a thermoplastic bag. The structure includes two films with different appearances at visually distinct contact areas, with a continuous contact area forming a hem seal near the top opening of the bag. The patent claim describes the specific details of the thermoplastic bag, including the first hem seal extending between the side edges of the first sidewall with a uniform width on one face and a variable width on the opposite face. GlobalData’s report on Clorox 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 Clorox, Thermoplastic elastomer laminates was a key innovation area identified from patents. Clorox's grant share as of September 2023 was 59%. Grant share is based on the ratio of number of grants to total number of patents.
A patent for a thermoplastic bag with a variable width hem seal
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A recently filed patent (Publication Number: US20230312201A1) describes a thermoplastic bag with unique features and construction methods. The bag consists of two sidewalls made of thermoplastic material, connected at the bottom fold and side edges, with a top opening formed by the sidewalls. The top opening includes a first top edge of the first sidewall folded over and secured by a first hem seal to create a hem channel.
The first hem seal is formed by the simultaneous application of heat and pressure, specifically by applying heat to the first face of the first sidewall while pressure is applied between the first and second faces. This method ensures a secure and uniform seal. Additionally, the first hem seal has a variable width on the second face of the first sidewall, which helps distribute stress concentration induced by the seal.
The patent also describes a multi-layer thermoplastic bag, consisting of an outer bag and an inner bag. The open top edges of both bags are folded over and secured by a hem seal to form a hem channel. The hem seal extends between the side edges with a uniform width on the outside face of the bag and has a lamination gradient, decreasing in strength away from the central longitudinal axis of the seal. This design allows for a visually appealing contrast between the outside and inside faces of the bag.
The hem seal in the multi-layer bag is formed using the same simultaneous application of heat and pressure method as in the single-layer bag. It ensures no visible air voids between the sealed layers and provides a stronger bond in the layers of the inner bag compared to the outer bag. The hem seal is also designed to separate before the material of the inner bag fails when subjected to peel forces.
Overall, this patent introduces innovative features and construction methods for thermoplastic bags, improving their strength, appearance, and functionality. The unique hem seal design and manufacturing process described in the patent offer potential benefits for bag manufacturers and users alike.
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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.
