A type of bend-resistant paper straw
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-15
- Publication Date
- 2026-08-14
AI Technical Summary
传统的纸质吸管结构强度薄弱，稍受外力就易发生折弯，无论是手持时的轻微用力，还是插入带盖饮品容器时与杯盖的短暂挤压，都可能导致吸管弯折、变形，一旦出现折弯，吸管内部通道会随之变窄甚至堵塞，直接无法正常吸吮饮品；即便折弯程度较轻未完全堵塞，也会大幅增加吸饮阻力，让消费者需用力吸吮才能喝到饮品，严重影响使用感受
本实用新型提供的一种防折弯纸质吸管，采用多层纸材复合卷制结构，相较于传统单层纸质吸管，显著提升吸管整体的结构强度和抗弯折能力，其中内纸层选用食品级硫酸盐纸，满足与食品直接接触的安全性要求；强化层采用高定量牛皮纸，利用其高强度、耐撕裂的特性，为吸管本体提供核心支撑，有效抵抗外部挤压、弯折力，避免吸管在使用中出现断裂、变形；外纸层选用牛皮纸，在保障安全性的同时，进一步增强吸管的整体结构完整性，提升抗折弯性能。
Smart Images
Figure CN224627916U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of straw technology, specifically to a bend-resistant paper straw. Background Technology
[0002] Paper straws are made of paper and are easily biodegradable, which is beneficial to environmental protection. Traditional paper straws have a weak structure and are easily bent by external force. Whether it is slight force when holding the straw or brief pressure from the lid when inserting it into a covered beverage container, the straw may bend or deform. Once bent, the internal channel of the straw will narrow or even become blocked, making it impossible to drink normally. Even if the bend is slight and not completely blocked, it will greatly increase the resistance to drinking, requiring consumers to suck hard to drink the beverage, which seriously affects the user experience.
[0003] Based on the above, this utility model proposes an anti-bend paper straw, which can effectively solve the above problems. Utility Model Content
[0004] This invention addresses the shortcomings of the existing technology by providing a bend-resistant paper straw.
[0005] This utility model is achieved through the following technical solution: A bend-resistant paper straw includes a straw body with a top opening and a slit at the bottom. The straw body is made of multiple layers of paper composite rolled together, the multiple layers of paper including an inner paper layer, a reinforcing layer and an outer paper layer from the inside out. The inner paper layer is made of food-grade sulfate paper; the reinforcing layer is made of high-basis-weight kraft paper; and the outer paper layer is made of food-grade kraft paper.
[0006] According to the above technical solution, as a further preferred technical solution, the inner paper layer, the reinforcing layer and the outer paper layer are bonded together by a biodegradable adhesive layer, wherein the biodegradable adhesive layer is a starch-based adhesive or a plant protein adhesive.
[0007] According to the above technical solution, as a further preferred technical solution, the number of reinforcing layers is at least two, and the fiber orientation between adjacent reinforcing layers is perpendicular to each other.
[0008] According to the above technical solution, as a further preferred technical solution, the outer surface of the outer paper layer is covered with a water-resistant coating, which is a PLA film layer.
[0009] According to the above technical solution, as a further preferred technical solution, the basis weight of the high basis weight kraft paper is 80-120 g / m².
[0010] Compared with the prior art, this utility model has the following advantages and beneficial effects: This utility model provides a bend-resistant paper straw, which adopts a multi-layer paper composite roll structure. Compared with traditional single-layer paper straws, it significantly improves the overall structural strength and bending resistance of the straw. The inner paper layer is made of food-grade sulfate paper, which meets the safety requirements for direct contact with food. The reinforcing layer is made of high-basis-weight kraft paper, which provides core support for the straw body by utilizing its high strength and tear resistance, effectively resisting external compression and bending forces, and preventing the straw from breaking or deforming during use. The outer paper layer is also made of kraft paper, which further enhances the overall structural integrity of the straw and improves its bending resistance while ensuring safety. Attached Figure Description
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation
[0012] To enable those skilled in the art to better understand the technical solution of this utility model, the preferred embodiments of this utility model are described below in conjunction with specific examples. However, it should be understood that the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. For better illustration of this embodiment, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art. The positional relationships described in the drawings are for illustrative purposes only and should not be construed as limiting this patent.
[0013] A bend-resistant paper straw includes a straw body 1, with a top opening 11 at the top and a slit 12 at the bottom. The straw body 1 is made of multiple layers of paper composite rolled together, the multiple layers of paper including an inner paper layer 13, a reinforcing layer 14, and an outer paper layer 15 from the inside out. The inner paper layer 13 is made of food-grade sulfate paper; the reinforcing layer 14 is made of high-basis-weight kraft paper; and the outer paper layer 15 is made of food-grade kraft paper.
[0014] This invention employs a multi-layer paper composite roll structure, which significantly improves the overall structural strength and bending resistance of the straw compared to traditional single-layer paper straws. The inner paper layer 13 is made of food-grade sulfate paper, meeting the safety requirements for direct contact with food. The reinforcing layer 14 is made of high-basis-weight kraft paper, utilizing its high strength and tear resistance to provide core support for the straw body, effectively resisting external compression and bending forces, and preventing the straw from breaking or deforming during use. The outer paper layer 15 is made of kraft paper, which, while ensuring safety, further enhances the overall structural integrity of the straw and improves its bending resistance.
[0015] Furthermore, in another embodiment, the inner paper layer 13, the reinforcing layer 14 and the outer paper layer 15 are bonded together by a biodegradable adhesive layer 16, which is a starch-based adhesive or a plant protein adhesive.
[0016] By using biodegradable adhesives made from starch-based or plant protein adhesives, not only can the adhesion be strong, preventing multiple layers of paper from delaminating and extending the life of the straw, but it also has biodegradable properties, reducing the environmental burden.
[0017] Furthermore, in another embodiment, the reinforcing layer 14 has at least two layers, and the fiber orientations between adjacent reinforcing layers 14 are perpendicular to each other.
[0018] By incorporating at least two reinforcing layers 14 with adjacent layers having fibers perpendicular to each other, the straw possesses balanced bending resistance in all directions, making it less prone to breakage. This also enhances the overall structural strength and tear resistance, preventing damage when inserted into hard packaging or subjected to pressure. Furthermore, in another embodiment, the outer surface of the outer paper layer 15 is covered with a water-resistant coating 17, which is a PLA film layer.
[0019] By setting up a PLA waterproof membrane, it effectively blocks the penetration of beverage moisture and oil, prevents the straw from softening after absorbing water, maintains its bending resistance, and the PLA membrane is biodegradable and non-toxic, taking into account both environmental protection and safety.
[0020] Furthermore, in another embodiment, the basis weight of the high-basis-weight kraft paper is 80–120 g / m².
[0021] By specifying that the basis weight of high-basis-weight kraft paper is 80-120 g / m², we can ensure that the kraft paper has sufficient thickness and strength to support the bending resistance requirements, without affecting the drinking experience due to excessive thickness and hardness of the material.
[0022] Based on the description and accompanying drawings of this utility model, those skilled in the art can easily manufacture or use the anti-bend paper straw of this utility model, and can produce the positive effects described in this utility model.
[0023] Unless otherwise specified, in this utility model, terms such as "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe orientation or positional relationships in this utility model are for illustrative purposes only and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood in conjunction with the accompanying drawings and according to the specific circumstances.
[0024] Unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" in this utility model should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0025] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications or equivalent changes made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A bend-resistant paper straw, characterized in that: The straw body (1) includes a top opening (11) at the top and a slit (12) at the bottom. The straw body (1) is made of multiple layers of paper composite rolls, which include an inner paper layer (13), a reinforcing layer (14) and an outer paper layer (15) from the inside to the outside. The inner paper layer (13) is made of food-grade sulfate paper. The reinforcing layer (14) is made of high-basis-weight kraft paper. The outer paper layer (15) is made of food-grade kraft paper.
2. The anti-bend paper straw according to claim 1, characterized in that: The inner paper layer (13), the reinforcing layer (14) and the outer paper layer (15) are bonded together by a biodegradable adhesive layer (16), which is a starch-based adhesive or a plant protein adhesive.
3. The anti-bend paper straw according to claim 1, characterized in that: The reinforcing layer (14) has at least two layers, and the fiber orientations between adjacent reinforcing layers (14) are perpendicular to each other.
4. The anti-bend paper straw according to claim 1, characterized in that: The outer surface of the outer paper layer (15) is covered with a water-resistant coating (17), which is a PLA film layer.
5. The anti-bending paper straw according to claim 1, characterized in that: The basis weight of the high-basis-weight kraft paper is 80-120 g / m².