The present invention relates to a system and method of producing different bio-based textile composite materials and products. These bio-based textile composite materials may be used for products in various industries, such as footwear and accessories. In particular, the present invention relates to a method of producing different bio-based mushroom textile materials using bio-based and biodegradable/compostable man-made-cellulosic fiber and vulcanized, non-chemically modified natural rubber. The man-made-cellulosic fiber is preferably as close to one hundred percent bio-based and biodegradable as possible, and may, for example, be manufactured from materials obtained from certified sustainable managed forests. These certified sustainable forests may be, for example, those certified by the Forest Stewardship Counsel or other agencies that certify and manage sustainable forests. The mushroom containing material and natural rubber material are applied as one or more coatings to a backing comprised of the man-made-cellulosic fiber and natural rubber, with the coatings and backing material being further treated during and after the application of the one or more coatings to produce a bio-based textile composition.
The use of synthetic polymeric materials instead of genuine leather within the footwear and accessories industry is increasing due to activities from consumer organizations globally rallying against the use of genuine leather. Synthetic polymeric materials are commonly retrieved from crude oil through extensive production processes, with the production of these crude oil-based synthetic poly triers creating a negative impact on the environment and contributing to climate change. These types of synthetic polymers are almost non-biodegradable, contaminate the global oceans and remain in the environment for thousands of years, and, in many cases, are not recyclable.
What is needed is a process to create alternatives to genuine leather materials that does not rely on synthetic polymers that harm the environment and negatively contribute to climate change.
The present invention is directed to a system and method for creating different bio-based, natural composite textile materials. These materials may be used, for example, as alternatives to textiles made from genuine leather and synthetic polymers for consumer goods such as footwear and accessories. The replacement of synthetic polymeric materials with materials created using naturally derived polymers and other bio-based materials helps to move towards increasing sustainability in the consumer goods industry. In particular, the present invention uses nature-provided materials that are obtainable without causing harm to the environment, and which, when separated, purified, and processed into composite materials present cost-efficient replacements to synthetic polymeric materials, The nature-provided materials used may include, for example, natural rubber and mushroom materials. The natural materials, such as natural rubber mushrooms, may be, for example combined with man-made-cellulosic fibers preferably sourced from a sustainable forest, to prepare a bio-based and sustainable but coated textile material and materials,
To create the bio-based composite textile materials, natural composite materials are applied onto a reinforcement backing material. The natural composite materials may include, for example, natural rubber, mushroom materials, and regenerated cellulose fibers such as man-made cellulosic fibers, such as cotton and jute, The reinforcement backing material may be, for example, made from non-woven regenerated cellulose fibers or a woven material produced from natural and sustainable fibers. This reinforcement backing may be a woven or non-woven man-made cellulosic fiber made of, for example, viscose, lyocell, modal and/or any other cellulose based non-woven fabric. The cellulose-based man-made cellulosic fibers are preferably sourced from certified sustainable managed forests. Such forests may be those certified by the Forest Stewardship Council or similar agencies that use their expertise to promote responsible management of the world's forests by bringing together experts from the environmental, economic and social areas. These certified sustainable managed forests are carbon neutral with every tree that is cut being replaced with additionally planted trees. The use of such certified materials in consumer goods allows the customer to trace where the material comes from based on assigned tracking information. This tracking information is included with shipments of any materials harvested from the forest.
The method and system use the man-made cellulosic fibers to produce a textured reinforcement backing material. As noted above, the man-made cellulosic fiber blend may be made from viscose and lyocell and is considered bio-based and bio-degradable. In addition, the man-made cellulosic fiber blend forming the reinforcement backing material may be made such that it does not contain any additional synthetic fibers to add additional material strength. The reinforcement backing material may have an area density to provide sufficient strength and permeability for use in consumer textile products. The reinforcement backing material may have varying densities which may apply for different final applications, one example being an area density of around 500 g/m2. Other densities may apply for different product applications and required performances. This reinforcement backing material may be created through a needle punching process and/or hydroentanglement process to create a non-woven backing material. Needle-punched non-woven fabrics can be made from various fibrous webs, fiber entanglement and frictions after fine needle barbs are repeatedly penetrated through fibrous web. The needle punched fabrics have a fibrous network with the non-woven fabrics providing specific functions including for example, resilience, stretch and softness. The non-woven fabric can also be made by hydroentanglement, where fibers are subjected to high pressure water streams, joining them together. The reinforcement backing material serves as an enforcement/backing material in the production of manufactured products. In the system and method described herein, the bio-based, natural composite materials are applied to the reinforcement backing material in one or more coating layers, resulting in a bio-based and substantially biodegradable textile material that provides high performance in consumer industries, such as the footwear industry.
In order to create a finished natural and substantially biodegradable textile material, coatings are applied to the man-made cellulosic fiber blend non-woven backing. Natural, substantially biodegradable materials that can be used to create these coatings include mushrooms and natural rubber, color pigments or dyes, and finishing additives. For example, mushrooms such as common Oyster mushrooms can be used as ingredients in a base-coating directly applied to the non-woven backing. The mushrooms that may be used in creating the coatings can be those that are considered waste mushrooms for not meeting strict requirements necessary to enter the food industry. These mushrooms are normally treated as animal food or are otherwise not harvested or are discarded.
In addition, the natural rubber used to produce the coating material for one or more of the coating layers may be retrieved from local sources. This natural rubber can be, for example, latex with a portion including solids, which are only stabilized with low amounts of ammonia and further treated with common vulcanization agents. The natural rubber is bio-based and can substantially biodegrade over time. A natural polymerization process is used to ensure that the latex is not vulcanized. The latex natural rubber may be obtained from certified sustainable forests, such as from Vietnam Forest Stewardship Council certified plantations and certified sustainable forests.
The system and method may be used to make high performance products, with some products including additional chemicals to enhance certain properties thereof. For example, to create a high performance textile product, chemicals such as polyurethane and butadiene may be added to the natural, biodegradable mushrooms and rubbers used in the one or more coatings is applied to the non-woven backing material. The coatings may be applied as separate layers, with the non-woven backing and any applied coating layers being allowed to dry and set before any subsequent layers are applied. The system and method may further include pressing or flattening the non-woven backing material and any applied coating layers before, during, or after such layers being dried and set. Color pigments or dyes may be added as ingredients to one or more of the coating layers in order to produce a desired color or patterns in the final product. Further, a softener agent may also be used in the one or more coatings or may be added to the final textile product after all coatings have been applied. This softening agent may be substantially biodegradable over time and may be made from biodegradable crude oil.
As described herein, the system and method can create materials for use in the leather industry and minimizes carbon footprint, water, and chemical consumption.
The system and method described herein implements a process directed to creating different bio-based, natural rubber and mushroom containing materials applied onto a reinforcement fabric backing material. The resulting product may be used to produce footwear and other consumer goods. As described herein, the reinforcement backing may be a non-woven man-made cellulosic fiber made of viscose, lyocell, modal and/or any other cellulose based non-woven fabric, or it may be a woven material produced from natural and sustainable fibers.
One or more coatings are created and applied to the reinforcement backing material. These coatings may be applied in different steps as separate layers, with each coating layer allowed to dry or set before application of the next coating layer. The coating layers may include, for example, a base-coating layer, an intermediate coating layer, and a final topcoat layer. The base-coating layer may be formed from a mixed slurry containing one or more of mushrooms, mushroom material, and natural rubber ingredients. Certain of the layers, such as the intermediate layer, may contain only natural rubber and color pigments or dyes. Other layers, such as the finishing layer, may include bio-based ingredients to provide desired performance and appearance characteristics to the final product. The layers, and in particular the base-coating layer, may be pressed and flattened before a subsequent coating layer is applied. After all coating layers have been applied and set, the thickness and amount of the resulting material comprised of the reinforcement backing mated al and all applied coating layers may be adjusted. For example, the resulting material may be trimmed or cut to a desired shape, size, and thickness.
As a first step in the process, a base-coating may be prepared and a base reinforcement backing material provided. The base-coating may then be applied to the reinforcement backing material one or both sides, The base coat may be created by combining ingredients including latex, water, pigments or dyes, and mushrooms or mushroom materials to create a slurry. If high performance characteristics, such as high tear strength, tensile strength, vamp flex cycles of >/=500,000 and Bally Flex cycles >/=50,000 are desired, then performance enhancing chemicals may also be added and mixed when making the base-coat slurry. Alternatively, or in addition, performance enhancing chemicals may also be added to the slurries used in the intermediate and finishing coatings described herein, or to the final textile product. The base-coat slurry may be created through combination of ingredients which are added into a mixing bowl in desired rations and in a desired order. The mushrooms used in the system and method described herein, are, for example, farmed mushrooms which are not used for human consumption. These mushrooms do not meet food industry requirements such as size, freshness and color and are generally repurposed as animal food or disposed, The mushrooms are used as filling material in the final product and are grinded to a fine mushroom powder with a particle size of 0.2 mm prior to preparation of the final slurry. All ingredients are mixed together, including the mushroom material, natural latex, water, additional required water based performance chemicals, natural plasticizer and pigments or dyes, which are mixed together at the same time. The latex is only stabilized with ammonia from the later supplier. No additions of stabilizing and/or vulcanizing agents are required to stabilize the natural rubber in the slurry, and thus no stabilizing or vulcanizing agents need to be added to the slurry. A mixer, such as an air pressured mixer, is used to mix the slurry until a homogenous solution is reached. Other mixers and devices can be used to mix the slurry including, for example a hydraulic mixer, mechanical mixer, agitator, or stirrer. This base-coat slurry is then applied to the reinforcement backing material. The base-coat slurry may be applied using, for example, a roller coater machine, doctor blade, Foulard system, brushes, or other application devices that spread the coating on the backing material. The base-coat slurry may be continuously mixed as it is applied using these systems. For example, when using a roller coater, the base-coat slurry may be continuously mixed as it is added to the roller coater machine. When using a Foulard system where the slurry is in a container and the non-woven or woven backing material is dipped in the container and transported through the container using rollers which squeeze the backing material, mixing devices, stirrers, or agitators may be included in the container with the slurry so as to continuously mix it to keep it as a substantially homogenous solution. One or more base-coatings may be applied to the reinforcement backing material to achieve the desired thickness of properties of the reinforcement backing material with the applied bio-based slurry. This coated material may also be pressed or flattened after application of one or more base coatings.
The pressing or flattening of the base-coated reinforcement backing material is done to level and even the surface while preparing for the next treatment and application of additional coating layers. For example, following application of the one or more base-coating layers and any pressing or flattening, the resultant base-coated reinforcement backing material may be prepared for application of one or more additional, intermediate coating layers. The intermediate coating layers may be applied using the same techniques as described above with respect to the base-coatings and may add a thin layer of material. After the one or more intermediate coating layers have been applied and dried or set, the sheets of material comprised of the reinforcement backing and any applied base and intermediate coating layers are prepared for application of final topcoats and additives. The formulation of the topcoat solution will vary based on the performance expectations of the final material, such as color requirements and surface structure requirements achieved by embossing. After the topcoat is applied to the sheet material comprising the reinforcement backing and coating layers applied thereto, the sheet material may be allowed to dry or set. Once complete, the final sheet material may be trimmed or cut to adjust the thickness, size, and shape. For example, the thickness may be adjusted based on different requirements of the products which will be made using the sheet material. To perform the thickness adjustment, a splitting machine may be used to take a sheet with an original thickness and split it based on various performance requirements for the final products.
After the base-coated reinforcement backing material has been compressed and flattened, the surface is smooth and leveled.
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This application claims priority to and the benefit of co-pending U.S. Provisional Patent Application No. 63/288,337, titled “METHOD OF PRODUCING A BIO BASED TEXTILE MATERIAL AND MATERIALS ANI) PRODUCTS MADE THEREBY,” filed Dec. 10, 2021, the full disclosures of which are hereby incorporated by reference in their entities for all purposes.
Number | Date | Country | |
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63288337 | Dec 2021 | US |