Environment-friendly recycled reconstituted pearl wool

Abstract

The utility model discloses environment-friendly circulating reconstituted pearl wool which comprises a pearl wool layer, a film covering layer used for being covered with an external film covering raw material and a connecting layer used for connecting the film covering layer and the external film covering raw material, the connecting layer is made of a water-soluble material, and the film covering layer is made of a polysaccharide material. And a connecting structure for improving the connecting strength of the laminating layer and the pearl surface layer is arranged between the laminating layer and the pearl cotton layer. The utility model solves the problem that the traditional pearl wool lacks environmental protection property and is difficult to recycle.

Description

Technical Field

[0001] This utility model relates to the field of pearl cotton technology, specifically to an environmentally friendly, recyclable pearl cotton. Background Technology

[0002] With the booming development of the e-commerce industry and the increasing busyness of the logistics and transportation industry, pearl cotton, as an excellent cushioning packaging material, is widely used in the packaging and protection of various products. It is lightweight and soft, with good cushioning performance, which can effectively reduce the risk of damage to products during transportation and storage.

[0003] However, traditional EPE foam has many drawbacks in terms of environmental performance and recyclability. On the one hand, the coating materials commonly used with EPE foam are mostly non-degradable polymers. These coatings are difficult to decompose in the natural environment and remain for a long time after disposal. They not only occupy a large amount of land resources but also pollute ecological elements such as soil and water. Therefore, the coating material needs to be separated from the EPE foam during recycling. However, the bonding coating between the traditional coating material and the EPE foam is difficult to separate, resulting in low recycling efficiency. On the other hand, the adhesives connecting the coating and the EPE foam are often organic solvent-based glues. Organic solvents are volatile and release volatile organic compounds (VOCs), which harm air quality. Furthermore, these glues make it difficult to separate the EPE foam and the coating during recycling, leading to complex and costly recycling processes. In many cases, due to technological and cost limitations, traditional EPE foam and its coating packaging can only be landfilled or incinerated, resulting in resource waste and increased environmental burden. Utility Model Content

[0004] In response to the shortcomings of existing technologies, this utility model provides an environmentally friendly and recyclable pearl cotton, which solves the problems of traditional pearl cotton lacking environmental friendliness and being difficult to recycle.

[0005] To achieve the above objectives, this utility model provides an environmentally friendly recyclable pearl cotton, comprising a pearl cotton layer, a coating layer for coating with external coating materials, and a connecting layer for connecting the coating layer and the external coating materials. The connecting layer is made of a water-soluble material, the coating layer is made of a polysaccharide material, and a connecting structure is provided between the coating layer and the pearl cotton layer to improve the connection strength between the coating layer and the pearl cotton surface layer.

[0006] The advantages of adopting the above technical solution are as follows: The connecting layer uses a water-soluble material. During the EPE foam recycling stage, simply soaking it in water will cause the connecting layer material to dissolve rapidly, allowing the coating layer to be easily separated from the external coating material. This avoids the problems of traditional organic solvent-based adhesives being difficult to remove and polluting the environment. Simultaneously, the coating layer is made of polysaccharide materials, which are naturally derived and have good biodegradability. After disposal, in the natural environment, they can be gradually decomposed into harmless substances such as carbon dioxide and water through the action of microorganisms, greatly reducing the long-term pollution of soil and water bodies by packaging waste, aligning with the current green and environmentally friendly development concept. Furthermore, thanks to the water-soluble connecting layer, the recycling process is significantly simplified. There is no need to use complex chemical reagents or harsh conditions such as high temperature and high pressure to disassemble the various structural layers of EPE foam, reducing recycling costs and energy consumption. Furthermore, the clearly defined biodegradable properties of each structural layer material allow EPE foam to be reprocessed more efficiently after recycling, entering a new production cycle and truly realizing resource recycling, improving resource utilization, and responding to the national call for sustainable development. A carefully designed connection structure between the coating layer and the EPE foam layer effectively enhances the bond strength between them. This ensures that during the normal lifespan of the EPE foam, whether subjected to bumps and vibrations during transportation or stacking and compression during storage, the coating layer will not easily separate from the EPE foam layer, maintaining the integrity of the packaging. This allows the EPE foam to reliably perform its cushioning and protective functions, providing reliable packaging protection for the product and reducing the risk of product damage due to packaging breakage.

[0007] The present invention further comprises: the connecting structure including a plurality of embedding grooves formed on the top wall of the pearl cotton layer and a plurality of embedding blocks set on the bottom wall of the coating layer, wherein the plurality of embedding blocks correspond one-to-one with the plurality of embedding grooves and are snapped together, and the plurality of embedding blocks are integrally connected to the coating layer.

[0008] The advantages of adopting the above technical solution are: the embedded block and the coating layer are integrally connected, that is, when the coating layer covers the pearl cotton layer, the embedded block can be stably placed in the embedded groove. Through the snap-fit ​​cooperation between the embedded groove and the embedded block, a solid connection is formed between the coating layer and the pearl cotton layer. In the daily use of pearl cotton, whether it is subjected to bumps and vibrations during transportation or the squeezing caused by the stacking of goods, this snap-fit ​​structure can effectively prevent the coating layer and the pearl cotton layer from accidentally separating. Compared with the method of simply relying on glue bonding, the mechanical connection has stronger shear and peel resistance, which greatly ensures the integrity of the overall packaging structure and allows the pearl cotton to continuously and stably perform its cushioning and protective functions.

[0009] The present invention further comprises: the radial cross section of the embedded block is arranged in a "+" shape, and the shape of the embedded groove is adapted to the shape of the embedded block.

[0010] The advantages of adopting the above technical solution are: the radial cross section of the embedded block is set in a "+" shape and the shape of the embedded groove is adapted to the shape of the embedded block, which further improves the connection strength and connection stability between the two.

[0011] The present invention further comprises: the coating layer is made of hydroxypropyl starch material and is connected to the pearl cotton layer by dip coating method.

[0012] The advantages of adopting the above technical solution are: after dip-coating, the hydroxypropyl starch solution can fully wet the surface of the pearl cotton layer, forming a tightly adhered film after drying. The hydroxyl groups on the hydroxypropyl starch molecular chain interact with the groups on the pearl cotton surface, generating strong adhesion. This ensures that the film layer will not easily peel off from the pearl cotton layer during daily use, even when subjected to external forces such as vibration, compression, and friction, thus maintaining the integrity of the packaging. The embedded block is integrally connected to the film layer, allowing the solution to fully fill the embedded groove when the film layer is attached to the pearl cotton layer through the dip-coating process. After cooling, the embedded block fills the embedded groove, further improving the connection strength between the two. Hydroxypropyl starch is a polysaccharide, and its raw material is starch, which is widely available and renewable, making it a natural and environmentally friendly material. The coating layer made with hydroxypropyl starch can be efficiently decomposed by microorganisms in the natural environment after the EPE foam is disposed of, eventually transforming into harmless substances such as carbon dioxide and water. This greatly reduces the environmental pollution caused by packaging waste, aligning with current stringent environmental regulations and the trend of sustainable development. Starch raw materials are inexpensive, and the production process of hydroxypropyl starch is mature, allowing for cost control under large-scale production. Compared to some expensive synthetic polymer coating materials, using hydroxypropyl starch significantly reduces the overall production cost of EPE foam, enhancing the product's price competitiveness in the market. It is particularly suitable for large-scale production in the packaging industry where cost control is paramount. Furthermore, the dip-coating method is simple to operate and requires no complex or expensive equipment. Simply immersing the pearl cotton in a prepared hydroxypropyl starch solution and then pulling it dry completes the coating process. This facilitates large-scale industrial and automated production, shortens the production cycle, improves production efficiency, and reduces labor and time costs. In the pearl cotton recycling stage, due to the hydrophilicity and biodegradability of hydroxypropyl starch, the coating layer can gradually disintegrate and detach from the pearl cotton with simple washing or placement in a suitable microbial environment. This facilitates the separate recycling and reprocessing of the pearl cotton material, optimizes the entire recycling process, and reduces energy consumption in recycling. The dip-coating method mentioned above is an existing technology. Its general process involves solution preparation, dip-coating operation, and drying and curing. The entire process is efficient, fast, and has low preparation costs. Since it is an existing technology, it will not be described in detail.

[0013] The present invention further comprises: the connecting layer is made by spraying a polyvinyl alcohol solution onto the surface of the coating layer.

[0014] The advantages of adopting the above technical solution are: the polyvinyl alcohol molecular chain is rich in hydroxyl groups, which can form hydrogen bonds or van der Waals forces with the polar groups on the surface of the coating layer (if it is a polysaccharide coating layer, it also contains abundant hydroxyl groups), thereby constructing a stable and strong adhesive system. This ensures that the coating layer is tightly connected to the external coating material during the service life of the pearl cotton, effectively resisting the bumps and friction during transportation and storage, and maintaining the integrity of the packaging; when the pearl cotton enters the recycling stage and it is necessary to disassemble the various structural layers, the connecting layer made of polyvinyl alcohol can give full play to its water solubility advantage. With just a simple soaking treatment in water, the connecting layer can be quickly dissolved, making it easy to separate the coating layer from the external coating material, greatly simplifying the recycling process, reducing recycling costs, and echoing the design concept of the entire environmentally friendly and recyclable pearl cotton; and the use of spray coating processing method can precisely control the thickness and coverage of the connecting layer. For pearl cotton products of varying shapes and sizes, uniform and complete film coverage can be achieved by adjusting spray gun parameters, such as spraying pressure and the distance between the nozzle and the coating layer, adapting to diverse production needs and ensuring consistent product quality. Meanwhile, polyvinyl alcohol is a non-toxic, odorless, and biodegradable material. Using it as a bonding layer ensures that no harmful chemicals remain in the recycling process after pearl cotton packaging is discarded, avoiding pollution of soil, water sources, and other natural environments. This aligns with the global trend of green environmental protection and sustainable development, and meets the growing demand for environmentally friendly packaging across various industries. The spraying method mentioned above is an existing technology. Its general process includes solution preparation, spraying preparation, spraying operation, and drying and curing. The entire process is efficient, fast, and has low preparation costs. Since it is an existing technology, it will not be elaborated further.

[0015] The present invention further comprises: a hot melt adhesive layer coated on the surface of the connecting layer.

[0016] The advantage of adopting the above technical solution is that the hot melt adhesive layer in the above technology further improves the adhesion ability of the bonding layer surface, thereby improving the connection strength between the external coating material and the coating layer. Attached Figure Description

[0017] Figure 1 This is a three-dimensional view of the present invention;

[0018] Figure 2 This is a three-dimensional view of the pearl cotton layer in this utility model;

[0019] Figure 3 This is a three-dimensional view of the coating layer in this utility model. Detailed Implementation

[0020] This utility model provides an environmentally friendly recyclable pearl cotton, comprising a pearl cotton layer 1, a coating layer 2 for coating with an external coating material, and a connecting layer 3 for connecting the coating layer 2 and the external coating material. The connecting layer 3 is made of a water-soluble material, and the coating layer 2 is made of a polysaccharide material. A connecting structure is provided between the coating layer 2 and the pearl cotton layer 1 to improve the bonding strength between the coating layer 2 and the pearl cotton surface layer. The connecting structure includes several embedded grooves 11 formed on the top wall of the pearl cotton layer 1 and several embedded grooves 11 formed on the bottom wall of the coating layer 2. The embedded blocks 21 are configured to correspond one-to-one with and snap into a plurality of embedded grooves 11. Each of the embedded blocks 21 is integrally connected to the coating layer 2. The radial cross section of the embedded blocks 21 is arranged in a cross shape. The shape of the embedded grooves 11 is adapted to the shape of the embedded blocks 21. The coating layer 2 is made of hydroxypropyl starch material and is connected to the pearl cotton layer 1 by dip coating. The connecting layer 3 is made of polyvinyl alcohol solution and is sprayed onto the surface of the coating layer 2. A hot melt adhesive layer 31 is coated on the surface of the connecting layer 3.

[0021] The dimensions and quantity of the embedded blocks and embedded slots in the above technology are not limited and can be adjusted according to actual production and application needs. The accompanying drawings in the specification only show the structural diagram.

[0022] The foregoing has shown and described the basic principles and main features of this utility model, as well as its advantages. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications may be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents.

Claims

1. An environmentally friendly recycled pearl wool, characterized in that: The application relates to a pearl wool layer, a film layer for covering film raw materials and a connecting layer for connecting the film layer and the film raw materials, wherein the connecting layer is made of water-soluble materials, the film layer is made of polysaccharide materials, and a connecting structure for improving the connecting strength between the film layer and the pearl wool layer is arranged between the film layer and the pearl wool layer.

2. The environmentally friendly recycled pearl wool according to claim 1, characterized in that: The connecting structure comprises a plurality of embedding grooves arranged on the top wall of the pearl wool layer and a plurality of embedding blocks arranged on the bottom wall of the film layer, the embedding blocks and the embedding grooves are one-to-one corresponding and are in clamping connection, and the embedding blocks are integrally connected with the film layer.

3. The environmentally friendly recycled pearl wool according to claim 2, characterized in that: The radial section of the embedding block is in the shape of a cross, and the shape of the embedding groove is matched with the shape of the embedding block.

4. The environmentally friendly recycled pearl wool according to claim 1, characterized in that: The film layer is made of hydroxypropyl starch materials and is connected with the pearl wool layer through the dip coating method.

5. The environmentally friendly recycled pearl wool according to claim 1, characterized in that: The connecting layer is made of polyvinyl alcohol solution and is sprayed on the surface of the film layer.

6. The environmentally friendly recycled pearl wool according to claim 1, characterized in that: A hot melt adhesive layer is coated on the surface of the connecting layer.

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