A waterproof and immersion-resistant paper straw

Abstract

This utility model relates to the field of straw technology and discloses a waterproof and immersion-resistant paper straw, including a paper straw body. The paper straw body includes an outer waterproof layer, a reinforcing layer fixedly disposed inside the outer waterproof layer, a paper core fixedly disposed inside the reinforcing layer, and an inner waterproof layer fixedly disposed inside the paper core. In this utility model, the double protection of the outer and inner waterproof layers, combined with the obstruction and support of the intermediate reinforcing layer and the paper core, allows the paper straw to maintain its structural integrity even after prolonged immersion in beverages, without softening, deformation, or cracking, effectively improving its service life and stability. The bamboo fiber and virgin wood pulp blend in the reinforcing layer gives the straw high strength and toughness, making it less prone to damage under bending and squeezing in daily use. The sulfate wood pulp in the paper core ensures that the straw has suitable hardness and stiffness, making it easy to insert into beverage packaging and use.

Description

Technical Field

[0001] This utility model relates to the field of straw technology, and in particular to a waterproof and immersion-resistant paper straw. Background Technology

[0002] Paper straws are an environmentally friendly type of straw, mainly used to replace traditional plastic straws to reduce environmental pollution. They are biodegradable products made primarily from wood pulp and are designed to replace traditional plastic straws to reduce environmental pollution. They have a standard cylindrical shape and their core function is to provide a drinking channel for various beverages such as soft drinks, juices, and cold drinks. They are widely used in the catering industry, fast food industry, beverage manufacturing industry, and home settings.

[0003] Most existing paper straws are made of single-coated or ordinary paper, which is difficult to resist when soaked in beverages. After prolonged use, the straw walls are prone to softening and cracking, making them unusable. Moreover, the traditional paper straws have a relatively simple structure and are not strong enough in a wet state. They are prone to breakage or excessive softening when bent, affecting the user experience.

[0004] Therefore, those skilled in the art have provided a waterproof and immersion-resistant paper straw to solve the problems mentioned in the background art. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a waterproof and immersion-resistant paper straw. The double protection of the outer and inner waterproof layers, combined with the intermediate reinforcing layer and the paper core for obstruction and support, allows the paper straw to maintain its structural integrity even after prolonged immersion in beverages, without softening, deformation, or cracking, effectively improving its service life and stability.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A waterproof and immersion-resistant paper straw includes a paper straw body, the paper straw body includes an outer waterproof layer, a reinforcing layer is fixedly disposed inside the outer waterproof layer, a paper core is fixedly disposed inside the reinforcing layer, and an inner waterproof layer is fixedly disposed inside the paper core.

[0008] The outer waterproof layer is made of food-grade water-based polyurethane coating material, the reinforcing layer is made of virgin wood pulp and bamboo fiber blend material, the paper core is made of sulfate wood pulp material, and the inner waterproof layer is made of biodegradable starch-based coating material.

[0009] The outer waterproof layer has a thickness of 0.015-0.025mm, the reinforcing layer has a thickness of 0.1-0.15mm, the paper core has a thickness of 0.15-0.18mm, and the inner waterproof layer has a thickness of 0.015-0.025mm.

[0010] The inner waterproof layer is disposed outside the outer waterproof layer, the outer paper core is disposed between the reinforcing layer and the inner waterproof layer, the outer paper core is disposed inside the outer waterproof layer, and the outer reinforcing layer is disposed between the paper core and the outer waterproof layer.

[0011] This utility model has the following beneficial effects:

[0012] This invention proposes a waterproof and immersion-resistant paper straw. During use, the paper straw will come into contact with liquid. The outer waterproof layer, made of food-grade water-based polyurethane coating, effectively repels liquid water, making it difficult for external liquids to wet the coating surface, thus achieving a barrier. The reinforcing layer is made of a blend of virgin wood pulp and bamboo fiber, which not only improves the overall strength but also ensures the stability of the straw's shape, guaranteeing normal drinking function. The paper core is made of sulfate wood pulp, serving as the core support of the paper straw. The inner waterproof layer is made of biodegradable starch-based coating material, mainly used to prevent internal liquids from seeping into the paper core and avoiding liquid corrosion of the paper core. Through the synergistic effect of this multi-layered, different material, the paper straw can maintain its structural integrity and functional stability even after prolonged immersion in liquid. Attached Figure Description

[0013] Figure 1 This is an isometric schematic diagram of the entire utility model;

[0014] Figure 2 This is a partial orthographic axonometric view of the present invention;

[0015] Figure 3 This is a partial planar sectional isometric view of the present invention;

[0016] Figure 4 This utility model Figure 2 Enlarged diagram of point A in the diagram.

[0017] Legend:

[0018] 1. Paper straw body; 101. Outer waterproof layer; 102. Reinforcing layer; 103. Paper core; 104. Inner waterproof layer. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Reference Figures 1-4 One embodiment provided by this utility model:

[0021] A waterproof and immersion-resistant paper straw includes a paper straw body 1, the paper straw body 1 includes an outer waterproof layer 101, a reinforcing layer 102 is fixedly disposed inside the outer waterproof layer 101, a paper core 103 is fixedly disposed inside the reinforcing layer 102, and an inner waterproof layer 104 is fixedly disposed inside the paper core 103.

[0022] The outer waterproof layer 101 is made of food-grade water-based polyurethane coating material, the reinforcing layer 102 is made of virgin wood pulp and bamboo fiber blend material, the paper core 103 is made of sulfate wood pulp material, and the inner waterproof layer 104 is made of biodegradable starch-based coating material. The thickness of the outer waterproof layer 101 is 0.015-0.025mm, the thickness of the reinforcing layer 102 is 0.1-0.15mm, the thickness of the paper core 103 is 0.15-0.18mm, and the thickness of the inner waterproof layer 104 is 0.015-0.025mm.

[0023] The inner waterproof layer 104 is disposed outside the outer waterproof layer 101, the paper core 103 is disposed outside the reinforcing layer 102 and the inner waterproof layer 104, the paper core 103 is disposed outside the outer waterproof layer 101, and the reinforcing layer 102 is disposed outside the paper core 103 and the outer waterproof layer 101.

[0024] Specifically, when the paper straw body 1 comes into contact with liquid, the food-grade water-based polyurethane coating of the outer waterproof layer 101 forms the first physical barrier. The tightly cross-linked water-based polyurethane molecules effectively block the penetration of external liquids. Its dense membrane structure can significantly reduce the diffusion rate of water molecules. If the external liquid breaks through the outer waterproof layer 101, the virgin wood pulp and bamboo fiber blend material of the reinforcing layer 102 comes into play. The high strength and high toughness of bamboo fiber, combined with the virgin wood pulp, not only delays further liquid penetration but also enhances the overall structural strength of the straw, preventing deformation due to water absorption. At the same time, it improves... The paper straw has improved overall strength and resistance to deformation. The sulfate wood pulp of the core 103 forms a second barrier to penetration through the tight interweaving of fibers. Its high burst strength and tensile strength can maintain the basic shape of the straw. In addition, it has good density and mechanical strength, providing solid structural support for the entire straw. The biodegradable starch-based coating has a molecular-level waterproof structure that can prevent liquid from directly contacting the interior. At the same time, the inner waterproof layer 104 can be naturally degraded in non-immersion environments, ensuring environmental protection. The layers work together to provide layer-by-layer protection from the outside to the inside, achieving a waterproof and immersion-resistant effect.

[0025] The outer waterproof layer 101, with a thickness of 0.015-0.025mm, and the inner waterproof layer 104, with a thickness of 0.015-0.025mm, achieve efficient waterproofing with relatively thin layers, reducing material costs. The combination of the reinforcing layer 102, with a thickness of 0.1-0.15mm, and the paper core 103, with a thickness of 0.15-0.18mm, ensures structural strength while maintaining the straw's flexibility and portability, optimizing the user experience. The cooperation between the reinforcing layer 102 and the paper core 103 gives the paper straw high strength and toughness. It can withstand greater external force and suction, and is not easily bitten, broken or deformed, making it more convenient and reliable to use. Even when sucking or stirring beverages with greater force, the straw can still maintain its shape and function, providing consumers with a good drinking experience. All materials used are food-grade, non-toxic and harmless, such as food-grade water-based polyurethane coating, virgin wood pulp, bamboo fiber, sulfate wood pulp and biodegradable starch-based coating, all of which meet the safety standards for food contact materials and will not release harmful substances into beverages, ensuring the safety and health of drinking.

[0026] The materials used in the outer waterproof layer 101, reinforcing layer 102, paper core 103, and inner waterproof layer 104 all have good biodegradability. For example, food-grade water-based polyurethane and biodegradable starch-based coatings can decompose into harmless substances in the natural environment within a certain period of time, without causing long-term pollution to the environment. This aligns with current environmental protection concepts and the requirements of sustainable development, and helps reduce the negative impact of non-biodegradable materials such as plastic straws on the environment. The structural design of this paper straw is suitable for various types of hot and cold beverages, ensuring a good sucking effect. The performance of the straw is not affected by the type or temperature of the beverage, and it has a wide range of applications, meeting the drinking needs of consumers in different scenarios.

[0027] The manufacturing process for the outer waterproof layer 101, reinforcing layer 102, inner waterproof layer 104, and paper core 103 can employ a coating process. Food-grade water-based polyurethane coating is evenly applied to the outer surface of the reinforcing layer 102, then tightly bonded to the inner surface of the outer waterproof layer 101. This bonding is achieved through pressure and temperature, forming a tight outer waterproof layer 101. Similarly, a biodegradable starch-based coating is applied to the inner surface of the paper core 103 and then tightly bonded to the inner waterproof layer 104, ensuring a strong bond between the inner waterproof layer 104 and the paper core 103. Alternatively, the layers can be stacked sequentially according to the design and placed in a laminating machine. During the lamination process, certain temperatures, pressures, and times are applied, causing the adhesives or coatings between the layers to undergo physicochemical changes such as melting, flowing, and curing. This tightly bonds the layers together, forming a unified paper straw structure. The lamination process ensures the connection strength and tightness between the layers while also improving production efficiency. The above-mentioned connection process is a mature and publicly available technology, therefore, its specific structure and working principle will not be elaborated upon further in this article.

[0028] Working principle: When the paper straw is used for drinking liquids, the outer waterproof layer 101 first comes into contact with the external liquid environment. Its food-grade water-based polyurethane coating effectively prevents external liquids from penetrating into the paper straw, preventing it from softening or deforming due to external liquid intrusion. It also prevents external liquids from directly contacting the paper core 103 and causing paper expansion. The reinforcing layer 102 is made of a blend of virgin wood pulp and bamboo fiber, which has high strength and toughness, providing good support for the paper straw. This prevents the straw from being easily bitten or broken during use, ensuring the stability of the straw's shape and maintaining normal drinking function. The paper core 103 is made of sulfate wood pulp and serves as the core support of the paper straw, providing a solid foundation for the entire straw structure. This ensures the straw's stiffness and overall strength during normal use, allowing it to withstand certain suction forces and external forces without easily being damaged. The biodegradable starch-based coating of the inner waterproof layer 104 mainly prevents internal liquids from penetrating into the paper core 103, avoiding liquid erosion of the paper core 103 and extending the lifespan of the paper straw.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A waterproof and immersion resistant paper straw comprising a paper straw body (1), characterized in that: The paper straw body (1) includes an outer waterproof layer (101), a reinforcing layer (102) is fixedly disposed inside the outer waterproof layer (101), a paper core (103) is fixedly disposed inside the reinforcing layer (102), and an inner waterproof layer (104) is fixedly disposed inside the paper core (103). The outer waterproof layer (101) is made of food-grade water-based polyurethane coating material, the reinforcing layer (102) is made of virgin wood pulp and bamboo fiber blend material, the paper core (103) is made of sulfate wood pulp material, and the inner waterproof layer (104) is made of biodegradable starch-based coating material. The outer waterproof layer (101) has a thickness of 0.015-0.025mm, the reinforcing layer (102) has a thickness of 0.1-0.15mm, the paper core (103) has a thickness of 0.15-0.18mm, and the inner waterproof layer (104) has a thickness of 0.015-0.025mm. The inner waterproof layer (104) is disposed outside the outer waterproof layer (101), the paper core (103) is disposed outside the reinforcing layer (102) and the inner waterproof layer (104), the paper core (103) is disposed outside the outer waterproof layer (101), and the reinforcing layer (102) is disposed outside the paper core (103) and the outer waterproof layer (101).

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