A separate collection bag for easy separation of centrifuge cups and centrifuged materials

Abstract

This utility model discloses a separate collection bag for facilitating the separation of centrifuge cups and centrifuged materials. It includes a main bag body, an annular pleated section, a sealing structure, and an arc-shaped fitting section. The main bag body is cylindrical with a diameter of 7.4 cm, designed to accommodate centrifuge cups. The annular pleated section is located in the middle of the outer wall of the main bag body, extending upwards and elastically stretching to accommodate centrifuge cups of different heights. The sealing structure is connected to the top of the main bag body, with an opening diameter of 7.8 cm. The top edge is thickened to form a sealing reinforcement edge for tightening and sealing. Thus, the bottom arc-shaped fitting section matches the curvature of the centrifuge cup bottom, leaving a 1-3 mm elastic margin. During centrifugation, it fits the bottom of the cup, preventing solid residue. The annular pleated section and the 2 cm pleats on the outer wall of the sealing section work together to adjust the base height by 11 cm to accommodate different centrifuge cups. The 2-5 mm wide sealing reinforcement edge, combined with the pleat deformation, forms a tight seal to prevent leakage.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary tools for laboratory centrifuge equipment, and in particular to a separator collection bag that facilitates the separation of centrifuge cups and centrifuged materials. Background Technology

[0002] In laboratory centrifugation, centrifuge cups are commonly used separation tools. After centrifuging a solid-liquid mixture, the liquid portion can be removed by pouring, but the remaining solid often adheres to the bottom of the centrifuge cup due to adhesion or surface tension, making complete separation difficult. Especially in precision experiments, solid residue can lead to mass loss and affect the accuracy of experimental results. Existing methods typically rely on manual scraping or rinsing, which is not only cumbersome but may also damage the inner wall of the centrifuge cup due to external force, or cause solid dissolution and contamination due to rinsing, failing to meet the requirements of high-precision experiments.

[0003] Currently, there is a lack of efficient tools on the market specifically designed for separating centrifuge cups from centrifuged materials. Traditional collection bags or containers cannot fit tightly to the bottom of the centrifuge cup, easily leading to liquid leakage or solid residue during centrifugation. While some deformable structures can adapt to the shape of the cup, they lack targeted sealing designs and high adaptability, resulting in low separation efficiency and inconvenient operation. Therefore, there is an urgent need for a device with a reasonable structure that can precisely fit the centrifuge cup and facilitate separation and collection, in order to solve the problems of centrifuged material residue, mass loss, and operational complexity in existing technologies. Utility Model Content

[0004] This utility model aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, the purpose of this utility model is to propose a separate collection bag that facilitates the separation of centrifuge cups and centrifuged materials. The bottom arc-shaped fitting part is consistent with the arc of the bottom of the centrifuge cup, with a 1-3mm elastic margin. It fits the bottom of the cup during centrifugation to avoid solid residue. The annular pleated part works in conjunction with the 2cm pleats on the outer side of the closure to adjust the 11cm base height to adapt to different centrifuge cups. The 2-5mm wide sealing reinforcement edge, together with the pleat deformation, forms a tight seal to prevent leakage.

[0006] To achieve the above objectives, this utility model proposes a separating collection bag for easy separation of centrifuge cups and centrifuged materials, comprising a main bag body, an annular pleated portion, a sealing structure, and an arc-shaped fitting portion. The main bag body is cylindrical with a diameter of 7.4 cm, designed to accommodate the centrifuge cup. The annular pleated portion is located in the middle of the outer wall of the main bag body, extending upwards from the middle, and can be elastically stretched to accommodate centrifuge cups of different heights. The sealing structure is connected to the top of the main bag body, with an opening diameter of 7.8 cm. The top edge is thickened to form a sealing reinforcement edge for tightening and sealing, and the outer wall of the sealing structure has pleats with a height of 2 cm. The arc-shaped fitting portion is located at the bottom of the main bag body, with a height of 0.8 cm, conforming to the curvature of the inner wall of the bottom of the centrifuge cup and allowing for elasticity, achieving a tight fit with the bottom of the centrifuge cup.

[0007] This utility model discloses a separator collection bag that facilitates the separation of centrifuge cups and centrifuged materials. The bottom arc-shaped fitting part is consistent with the arc of the bottom of the centrifuge cup, with a 1-3mm elastic margin. It fits the bottom of the cup during centrifugation to avoid solid residue. The annular pleated part works in conjunction with the 2cm pleats on the outer side of the closure to adjust the 11cm base height to adapt to different centrifuge cups. The 2-5mm wide sealing reinforcement edge, together with the pleat deformation, forms a tight seal to prevent leakage.

[0008] In addition, the separatory collection bag that facilitates the separation of the centrifuge cup and the centrifuged material according to the above-mentioned application may also have the following additional technical features:

[0009] Specifically, the main bag body, the annular pleated part, the closing structure, and the arc-shaped fitting part are integrally molded structures, made of linear low-density polyethylene (LLDPE) material, which has transparency and tensile strength. The pleats on the outer wall of the closing structure are made of the same material and process as the annular pleated part of the main bag body.

[0010] Specifically, the overall height of the main bag body is 11cm. The height of the main bag body can be adjusted by expanding or contracting the pleats to match the inner wall height of centrifuge cups of different sizes. The outer wall of the sealing structure has pleats with a height of 2cm, which can help adjust the opening shape and enhance the deformation adaptability during sealing.

[0011] Specifically, the width of the sealing reinforcement edge is 2-5mm. By squeezing with a sealing tool, the sealing structure can form a tight seal to prevent leakage of centrifuged materials. The pleats can deform together during squeezing to improve the reliability of the seal.

[0012] Specifically, the arc-shaped fitting part and the cylindrical side wall of the main bag body adopt a smooth arc transition, and the bottom edge is reserved with an elastic margin of 1-3mm to ensure that the centrifuged material is completely attached to the bottom of the collection bag during the centrifugation process.

[0013] The advantages of this invention compared to existing technologies are as follows:

[0014] (1) The bottom arc-shaped fitting part is consistent with the arc of the inner wall of the bottom of the centrifuge cup, with a reserved elastic margin (1-3mm). During centrifugation, it fits tightly under the action of centrifugal force to avoid solid residue in the gap between the bag and the cup.

[0015] (2) The ring-shaped pleats and the outer wall pleats of the closing structure work together to adjust the effective height of the bag (basic height 11cm) by expanding or contracting the pleats, so as to fit centrifuge cups of different specifications.

[0016] (3) Sealing reinforcement edge (31) Width 2-5mm, thickened and coarsened treatment, combined with the deformation adaptability of the outer wall folds, can form a sealed opening to prevent centrifugal material leakage.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a perspective view of a separating collection bag that facilitates the separation of a centrifuge cup from centrifuged material, according to one embodiment of the present invention.

[0020] Figure 2 This is a front view of a separating collection bag that facilitates the separation of centrifuge cups and centrifuged materials according to an embodiment of the present invention.

[0021] As shown in the figure: 1. Main bag body; 2. Circular pleated section; 3. Closure structure; 4. Arc-shaped fitting section; 31. Sealing reinforcement edge; 32. Pleats. Detailed Implementation

[0022] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0023] The following description, in conjunction with the accompanying drawings, describes a separating collection bag that facilitates the separation of centrifuge cups and centrifuged materials according to an embodiment of the present invention.

[0024] like Figures 1-2As shown, an embodiment of the present invention provides a separating collection bag for facilitating the separation of centrifuge cups and centrifuged materials, comprising a main bag body 1, an annular pleated portion 2, a sealing structure 3, and an arc-shaped fitting portion 4.

[0025] It is understood that the main bag 1 is a cylindrical structure with a diameter of 7.4 cm, made of linear low-density polyethylene (LLDPE). Its outer diameter is compatible with the inner wall diameter of a common 500 ml centrifuge cup, allowing it to be directly placed inside the centrifuge cup to form a space for the centrifuged material. The cylindrical design ensures that the bag fits tightly against the inner wall of the centrifuge cup, reducing liquid sloshing during centrifugation.

[0026] The annular pleated section 2 is located in the middle of the outer wall of the main bag body 1, extending upwards from the middle of the bag's height to the bottom of the sealing structure 3. The pleats are evenly distributed in an annular pattern, with the pleat direction parallel to the bag's axis, exhibiting elastic tensile properties. When the height of the centrifuge cup is greater than the basic height of the bag (11cm), the pleated section 2 can unfold upwards, increasing the total height of the bag; conversely, the pleated section 2 contracts to accommodate shorter centrifuge cups, ensuring that the top of the bag is flush with or slightly higher than the mouth of the centrifuge cup, facilitating subsequent sealing operations.

[0027] The sealing structure 3 is connected to the top of the main bag body 1, with an opening diameter of 7.8cm, slightly larger than the diameter of the main bag body 1 (7.4cm), forming an outwardly flared edge structure. Its top edge is thickened to form a 2-5mm wide sealing reinforcement edge 31, facilitating manual pinching or compression using sealing tools. Simultaneously, the outer wall of the sealing structure 3 has pleats 32 with a height of 2cm. These pleats are made of the same material and using the same process as the annular pleats 2, and can elastically deform during the sealing process. When sealing is required, the pleats 32 can be compressed, causing the sealing reinforcement edge 31 to fit tightly, forming a sealed opening and preventing centrifugal materials from spilling during collection.

[0028] The arc-shaped fitting part 4 is located at the bottom of the main bag body 1, with a height of 0.8cm. Its curvature is completely consistent with the inner wall of the bottom of a standard centrifuge cup, and a 1-3mm elastic allowance is reserved at the edge. This allowance is subjected to centrifugal force during centrifugation, ensuring that the arc-shaped fitting part 4 fits tightly against the inner wall of the bottom of the centrifuge cup, preventing solids from remaining in the gap between the bottom of the bag and the bottom of the cup. The arc-shaped fitting part 4 is connected to the cylindrical side wall of the main bag body 1 through a smooth arc transition, reducing the retention of liquids and solids at corners and ensuring that the centrifuged material (especially solids) is completely attached to the bottom of the bag.

[0029] Workflow:

[0030] 1. Install into the centrifuge cup: Place the main bag 1 into the centrifuge cup, and adjust the height of the bag by the elastic stretching of the annular pleated part 2 so that the arc-shaped fitting part 4 completely covers the bottom of the centrifuge cup, ensuring that the curvature of both is consistent and the edge margin fits the cup wall.

[0031] 2. Centrifugation operation: After adding the sample to be centrifuged, place the centrifuge cup into the centrifuge. During the centrifugation process, the bag rotates at high speed with the centrifuge cup. The arc-shaped fitting part 4 adheres tightly to the bottom of the cup under the action of centrifugal force. The solid matter settles and adheres to the bottom of the bag due to the density difference.

[0032] 3. Separation and collection: After centrifugation, pour out the upper liquid, lift the bag so that the sealing structure 3 is exposed at the cup mouth, adjust the opening shape by the pleats 32 on the outer wall of the sealing structure 3, pinch the sealing reinforcement edge 31 or use a sealing tool to squeeze, and use the deformation adaptability of the pleats 32 to form a seal. Finally, take out the collection bag as a whole to complete the separation and collection of the centrifuged matter.

[0033] In one embodiment of this utility model, such as Figures 1-2 As shown, the main bag body 1, the annular pleated part 2, the closing structure 3 and the arc-shaped fitting part 4 are integrally molded structures, made of linear low-density polyethylene (LLDPE) material, which has transparency and tensile strength. The pleats 32 on the outer wall of the closing structure 3 are the same material and process as the annular pleated part 2 of the main bag body 1.

[0034] As can be understood, the main body bag 1 is a cylindrical basic frame, with the bottom extending directly to form an arc-shaped fitting part 4. The two are connected by a smooth arc transition (not a right-angle splicing), with no corners or dead angles in the transition area to avoid the retention of centrifuged materials. The curvature and height (0.8cm) of the arc-shaped fitting part 4 are precisely matched with the diameter (7.4cm) of the main body bag 1 in the mold design to ensure a complete fit with the inner wall of the bottom of the centrifuge cup. The reserved 1-3mm elastic allowance is naturally formed by the one-piece molding process, without the need for post-processing.

[0035] The annular pleats 2 extend upwards from the middle of the outer wall of the main bag body 1 to the bottom of the closing structure 3, forming a continuous elastic adjustment area with the pleats 32 on the outer wall of the closing structure 3. This ensures uniform deformation during stretching.

[0036] The annular pleated section 2 is responsible for adjusting the height of the middle part of the bag to adapt to the depth of the inner wall of the centrifuge cup;

[0037] The pleats 32 of the sealing structure 3 assist in the fine adjustment of the diameter at the opening and the compression deformation during sealing. The two are integrated through molding to achieve unified mechanical properties, avoiding breakage or sealing failure due to material differences.

[0038] In one embodiment of this utility model, such as Figures 1-2 As shown, the overall height of the main bag 1 is 11cm. The annular pleated part 2 can adjust the height of the main bag 1 by unfolding or contracting the pleats to match the inner wall height of centrifuge cups of different sizes. The pleats on the outer wall of the sealing structure 3 are 2cm high, which can help adjust the opening shape and enhance the deformation adaptability when sealing.

[0039] It is understood that the overall height of the main bag body 1 is 11cm (including the bottom arc-shaped fitting part 4, which is 0.8cm high), and this size is suitable for the inner wall height of mainstream 500ml centrifuge cups. The cylindrical design (7.4cm in diameter) ensures that when the bag body is placed vertically in the centrifuge cup, the side wall fits tightly against the cup wall, reducing shaking during centrifugation.

[0040] The annular pleated section 2 is located in the middle of the outer wall of the main bag body 1, extending upwards to the bottom of the closing structure 3. The pleats are evenly distributed in an annular shape, with the direction parallel to the axis of the bag body. The effective height of the bag body can be adjusted by unfolding or shrinking.

[0041] When unfolded: Pleated part 2 stretches upward, increasing the total height of the bag to accommodate a taller centrifuge cup;

[0042] When shrinking: the pleats 2 are compressed downwards, shortening the total height of the bag and making it suitable for shorter centrifuge cups.

[0043] The outer wall of the closing structure 3 has pleats 32 with a height of 2cm, which are made of the same material and process as the annular pleats 2 and can be elastically deformed.

[0044] Adjusting the opening shape: When the pleats 32 are unfolded, the diameter of the closed opening is 7.8cm, which makes it easy to pour in the sample; when compressed, the opening shrinks, which helps to seal and strengthen the fit of the edge 31.

[0045] In one embodiment of this utility model, such as Figures 1-2 As shown, the width of the sealing reinforcement edge 31 is 2-5mm. By squeezing with a sealing tool, the closing structure 3 can form a sealed opening to prevent leakage of centrifugal materials. The pleats 32 can deform together during squeezing to improve the reliability of the seal.

[0046] It is understood that the sealing reinforcement edge 31 is located at the top edge of the closing structure 3, and its width is controlled at 2-5mm. This width ensures the feel of manual pinching and provides a precise force application area for sealing tools (such as sealing clamps and heat sealers), avoiding uneven force or sealing failure caused by the edge being too narrow.

[0047] Pleats 32 are evenly distributed on the outer wall of the sealing structure 3, with a height of 2cm. The direction of the pleats is parallel to the axis of the bag body (longitudinal pleats). The spacing and depth of individual pleats are precisely controlled during one-piece molding to ensure uniform deformation during extrusion. Their function is equivalent to an "elastic buffer," providing the following auxiliary functions during the sealing process:

[0048] Deformation compensation: When the sealing tool squeezes the sealing reinforcement edge 31, the folds 32 are compressed simultaneously, converting the linear extrusion stress into the axial contraction of the folds, thus avoiding material damage caused by local stress concentration;

[0049] Extended sealing path: After compression, the opening circumference of the closing structure 3 is shortened, making the edge contact of the sealing reinforcement edge 31 tighter, forming a composite sealing structure of "multiple folds + edge pressing".

[0050] Unsealed state: The 32 pleats are naturally stretched out, and the 3-sealed structure has an opening diameter of 7.8cm, which is convenient for pouring liquids or adding samples;

[0051] Sealing process: When sealing tools (such as tweezers, special sealing clips) are used to clamp the sealing reinforcement edge 31, the pleats 32 are compressed due to external force, and the height is shortened from 2cm to less than 1cm, which causes the top of the closing structure 3 to shrink inward, so that the two sides of the reinforcement edge 31 are completely attached and even partially overlapped.

[0052] Sealing complete: The elastic deformation of the pleats 32 generates a restoring force, continuously applying lateral pressure to the reinforcing edge 31 to ensure a gapless seal, so that the centrifuge will not leak even if it is inverted or shaken.

[0053] In one embodiment of this utility model, such as Figures 1-2 As shown, the arc-shaped fitting part 4 and the cylindrical side wall of the main bag body 1 adopt a smooth arc transition, and the bottom edge is reserved with an elastic margin of 1-3mm to ensure that the centrifuged material is completely attached to the bottom of the collection bag during the centrifugation process.

[0054] It is understood that the arc-shaped fitting part 4 is located at the bottom of the main body bag 1, with a height of 0.8cm, and it transitions to the cylindrical sidewall of the main body bag 1 through a rounded surface without sharp edges. This design eliminates the dead corners between the bottom of the bag and the sidewall, allowing the centrifuged material (especially solids) to adhere directly to the bottom of the bag along the smooth curved surface during sedimentation, avoiding residue caused by corner retention.

[0055] The bottom edge of the arc-shaped fitting part 4 is slightly wider than the diameter (7.4cm) of the main bag body 1, leaving an elastic allowance of 1-3mm. This allowance is made of flexible material (LLDPE), which naturally bulges slightly when there is no external force, and can elastically expand under the action of centrifugal force during centrifugation, tightly fitting the inner wall of the bottom of the centrifuge cup, ensuring that there is no gap between the bottom of the bag and the bottom of the cup.

[0056] Specifically, the actual usage process during implementation is as follows:

[0057] 1. Install the cup and adjust the height:

[0058] Holding the main bag 1, place it vertically into the target centrifuge cup (taking a 500ml centrifuge cup as an example), allowing the curved fitting part 4 to hang naturally to the bottom of the cup. If the height of the centrifuge cup is 11cm greater than the base height, gently pull the main bag 1 upwards. The annular pleats 2 will unfold due to their elasticity, causing the closing structure 3 to rise until the 1-3mm elastic margin at the edge of the curved fitting part 4 is completely fitted to the inner wall of the cup bottom. If the centrifuge cup is shorter, press the main bag 1 downwards. The annular pleats 2 will contract, making the top of the closing structure 3 flush with the cup rim, ensuring the bag is stably contained within the cup.

[0059] 2. Sample loading and centrifugation:

[0060] The solid-liquid mixture sample to be centrifuged is injected into the main body bag 1 through the opening (7.8 cm in diameter) of the constriction structure 3, with the liquid level not exceeding 2 / 3 of the height of the main body bag 1. The centrifuge cup is fixed to the centrifuge, and the centrifugation program is started. During high-speed rotation, the annular pleats 2 naturally expand due to centrifugal force, maintaining the vertical shape of the bag; the elastic margin of the arc-shaped fitting part 4 expands outward under the action of centrifugal force, tightly fitting the bottom of the cup. Due to the density difference, the solid matter settles towards the bottom of the bag and adheres to the surface of the arc-shaped fitting part 4, while the liquid gathers along the side wall of the main body bag 1 towards the mouth of the cup.

[0061] 3. Liquid separation and opening adjustment:

[0062] After centrifugation, tilt the centrifuge cup and pour out the upper liquid through the rim. The solids will remain completely trapped at the bottom of the bag in the curved fitting section 4. Lift the main bag 1 to expose the sealing structure 3 at the rim. Observe that the pleats 32 on the outer wall of the sealing structure 3 are in a naturally extended state (height 2cm), with an opening diameter of 7.8cm. Depending on the solids collection requirements, the outer wall of the sealing structure 3 can be manually pinched to compress the pleats 32, reducing the opening diameter to match the diameter of the main bag 1 (7.4cm), facilitating subsequent sealing.

[0063] 4. Sealing operation and complete collection:

[0064] Pinch the sealing reinforcement edge 31 (2-5mm wide) at the top of the sealing structure 3 with your thumb and forefinger, and apply even pressure along the axis of the bag. At this time, the pleats 32 will compress simultaneously, shortening their height from 2cm to less than 1cm. The top of the sealing structure 3 will contract inward, making the two sides of the sealing reinforcement edge 31 fit tightly together. If a high-strength seal is required, a special sealing clip can be used to clamp the sealing reinforcement edge 31, using the elastic deformation of the pleats 32 to assist in applying pressure and forming a gapless airtight seal. After confirming the seal, lift the main bag body 1 vertically upward. The arc-shaped fitting part 4 will return to its natural shape due to the disappearance of centrifugal force and easily separate from the bottom of the cup. The solid matter can be completely removed with the bag body, and there will be no residue at the bottom of the centrifuge cup.

[0065] In summary, the present invention provides a separating collection bag that facilitates the separation of centrifuge cups and centrifuged materials. The bottom arc-shaped fitting part is consistent with the arc of the bottom of the centrifuge cup, with a 1-3mm elastic margin. It fits the bottom of the cup during centrifugation to avoid solid residue. The annular pleated part works in conjunction with the 2cm pleats on the outer side of the closure to adjust the 11cm base height to adapt to different centrifuge cups. The 2-5mm wide sealing reinforcement edge, combined with the deformation of the pleats, forms a tight seal to prevent leakage.

[0066] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0067] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0068] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A separation collection bag facilitating separation of a centrifugation cup from a centrifugate, characterized by, It includes a main bag body (1), an annular pleated section (2), a closing structure (3), and an arc-shaped fitting section (4), wherein, The main body bag (1) is cylindrical with a diameter of 7.4 cm and is used to be placed inside a centrifuge cup; The annular pleated part (2) is located in the middle of the outer side wall of the main body bag (1), and extends upward from the middle, and can be elastically stretched to adapt to centrifuge cups of different heights. The closing structure (3) is connected to the top of the main bag body (1), with an opening diameter of 7.8cm. The top edge is thickened and enlarged to form a sealing reinforcement edge (31) for tightening and sealing. The outer wall of the closing structure (3) is provided with pleats (32) with a height of 2cm. The arc-shaped fitting part (4) is located at the bottom of the main bag body (1), with a height of 0.8cm. It is consistent with the arc of the inner wall of the bottom of the centrifuge cup and has reserved elastic margin to achieve a tight fit with the bottom of the centrifuge cup.

2. The separatory collection bag for facilitating the separation of centrifuge cup and centrifuged material according to claim 1, characterized in that, The main body (1), the annular pleated part (2), the closing structure (3) and the arc-shaped fitting part (4) are integrally molded structures, made of linear low-density polyethylene (LLDPE) material, which has transparency and tensile strength. The pleats (32) on the outer wall of the closing structure (3) are consistent with the material and process of the annular pleated part (2) of the main body (1).

3. A separatory collection bag for facilitating the separation of centrifuge cups and centrifuged materials according to claim 1, characterized in that, The overall height of the main body bag (1) is 11cm. The height of the main body bag (1) can be adjusted by unfolding or contracting the pleats of the annular pleated part (2) to match the inner wall height of centrifuge cups of different specifications. The outer wall height of the closing structure (3) is 2cm with pleats, which can help adjust the opening shape and enhance the deformation adaptability when sealing.

4. A separatory collection bag for facilitating the separation of centrifuge cups and centrifuged materials according to claim 1, characterized in that, The width of the sealing reinforcement edge (31) is 2-5mm. By squeezing with a sealing tool, the closing structure (3) can form a sealed opening to prevent leakage of centrifugal matter. The pleats (32) can deform together during squeezing to improve the sealing reliability.

5. A separatory collection bag for facilitating the separation of centrifuge cups and centrifuged materials according to claim 1, characterized in that, The arc-shaped fitting part (4) and the cylindrical side wall of the main bag body (1) adopt a smooth arc transition, and the bottom edge is reserved with an elastic margin of 1-3mm to ensure that the centrifuged material is completely attached to the bottom of the collection bag during the centrifugation process.

Images