Large-diameter reagent plastic bottle

Abstract

The utility model relates to reagent storage container technical field, concretely relates to a large -caliber reagent plastic bottle, the large -caliber reagent plastic bottle includes bottle body, the pull -ring cover with external thread that heat -fusion welding is on bottle body and is used for to the sealing of bottle body, the screw lid with internal thread and is connected on pull -ring cover and is used for to the sealing of pull -ring cover. The utility model solves the technical problem that the existing large -caliber reagent plastic bottle is poor in sealing reliability, and the pollution prevention effect is poor, effectively adapts chemical experiment, industrial reagent storage etc. scene demand.

Description

Technical Field

[0001] This utility model relates to the field of reagent storage container technology, and more specifically, it relates to a large-diameter reagent plastic bottle. Background Technology

[0002] In chemical experiments, industrial reagent storage, and related fields, large-mouth (inner diameter of the bottle mouth ≥ 30 mm) reagent plastic bottles are widely used because they facilitate the storage and retrieval of large quantities or volumes of reagent materials. However, the sealing performance of existing large-mouth reagent plastic bottles still has problems that urgently need to be solved:

[0003] On the one hand, traditional large-diameter reagent plastic bottles mostly use a single screw cap that fits directly into the bottle mouth for sealing. Because the sealing surface area of ​​the large-diameter bottle mouth is large, a single screw cap is difficult to maintain a good sealing effect for a long time. It is prone to leakage due to factors such as decreased thread fit precision and aging of the sealing components, which can lead to the reagent inside the bottle being contaminated by external air and impurities, or the reagent itself evaporating and deteriorating.

[0004] On the other hand, some reagent plastic bottles with multi-layer sealing structures attempt to enhance sealing performance through the approach of "primary sealing + secondary protection," but suffer from unreasonable structural design issues. For example, the long-term stability of the primary seal (such as simple aluminum foil bonding, inner plug locking, etc.) is insufficient, and the design of the secondary protective cap (such as screw cap) in conjunction with the primary sealing structure is not "specifically protective" for the primary sealing structure. This makes it difficult to fully block the adverse effects of external dust, collisions, and other factors on the primary sealing structure, which may accelerate the deterioration of the primary seal.

[0005] Therefore, there is an urgent need to design a large-diameter reagent plastic bottle that has a reliable seal and good anti-pollution effect. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a large-diameter reagent plastic bottle to solve the technical problems of poor sealing reliability and poor anti-pollution effect of existing large-diameter reagent plastic bottles.

[0007] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0008] A large-diameter reagent plastic bottle includes a bottle body, a pull ring cap with external threads that is heat-melted welded to the bottle body for sealing the bottle body, and a screw cap with internal threads that is connected to the pull ring cap for sealing the pull ring cap.

[0009] Preferably, the bottle body has a first welding ring with a flat upper surface at the bottle mouth, and a second welding ring with a flat lower surface at the lower end of the pull-ring cap; the second welding ring is heat-fused to the first welding ring to seal the bottle body.

[0010] Preferably, the upper end of the pull ring cover is provided with a sealing sheet, the top of the sealing sheet is provided with a pull ring, and the bottom of the sealing sheet is provided with an easy-pull groove to facilitate the pull ring to tear the sealing sheet.

[0011] Preferably, the screw cap has a secondary sealing ring inside, and the secondary sealing ring and the outer wall of the screw cap form a secondary sealing ring groove that fits over the outer wall of the sealing pull ring cap; the width of the secondary sealing ring groove is ≥1.5mm and its depth is ≥1.5mm.

[0012] Preferably, the pull ring is located inside the secondary sealing ring; the top of the sealing sheet is provided with a reinforcing ring to facilitate the complete tearing of the sealing sheet.

[0013] Preferably, the bottle body and the pull-tab cap are made of the same type of plastic.

[0014] Preferably, the outer wall of the screw cap is provided with anti-slip texture.

[0015] Preferably, the inner diameter of the bottle opening is ≥30mm.

[0016] In summary, this utility model has the following beneficial effects: the bottle body and pull-ring cap are made of the same type of plastic, and the planar hot-melt welding of the first welding ring at the bottle mouth and the second welding ring of the pull-ring cap can form a stable and continuous primary sealing interface, effectively solving the problems of easy leakage of traditional single screw cap seals or insufficient long-term effectiveness of simple primary seals, and preventing the reagents in the bottle from being contaminated, volatilized or deteriorated; the sealing plate at the upper end of the pull-ring cap, combined with the top pull ring, the bottom easy-pull groove and the reinforcing ring, not only makes it easy for users to quickly and completely pull the sealing plate to open the reagent plastic bottle, but also ensures the sealing performance of the sealing plate before opening; the secondary sealing ring groove formed by the secondary sealing ring inside the screw cap and the outer wall can be fitted onto the outer wall of the sealing pull-ring cap, and the design of the pull ring being located inside the secondary sealing ring creates a double sealing barrier, further improving the anti-contamination effect, and the anti-slip texture on the outer wall of the screw cap makes it easy to tighten and open. Overall, it takes into account the sealing reliability, ease of use and anti-contamination capability of large-diameter reagent plastic bottles, and effectively adapts to the needs of chemical experiments, industrial reagent storage and other scenarios. Attached Figure Description

[0017] Figure 1 This is the front view of this embodiment.

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0020] Figure 4 This is a schematic diagram of the structure of the pull ring cover in this new embodiment.

[0021] Figure 5This is the front view of the pull ring cover in this new embodiment.

[0022] Figure 6 This is a cross-sectional view of the pull ring cover in this embodiment.

[0023] In the diagram: 1. Bottle body; 11. First welding ring; 2. Pull-ring cap; 21. Second welding ring; 22. Sealing plate; 221. Easy-open groove; 222. Reinforcing ring; 23. Pull ring; 3. Screw cap; 31. Secondary sealing ring; 4. Annular sealing gasket. Detailed Implementation

[0024] To make the objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Several embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein.

[0025] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] This utility model provides a large-diameter reagent plastic bottle, such as Figure 1-3 As shown, it includes a bottle body 1, a pull ring cap 2 with external threads that is heat-fused to the bottle body 1 and used to seal the bottle body 1, and a screw cap 3 with internal threads that is connected to the pull ring cap 2 and used to seal the pull ring cap 2.

[0027] Specifically, the bottle body 1 and the pull-ring cap 2 are respectively formed from plastic granules using injection molding or blow molding processes. To improve the compatibility of the weld interface and achieve a better sealing effect, both are preferably made of the same type of plastic, such as medical-grade polypropylene (PP), polyethylene (PE), polycarbonate (PC), polystyrene (PS), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyetheretherketone (PEEK), acrylonitrile-butadiene-styrene copolymer (ABS), or polytetrafluoroethylene (PTFE). The pull-ring cap 2 has an integrally formed external thread on its outer wall, and the screw cap 3 has an integrally formed internal thread on its inner wall. The two are detachably connected by threaded fitting. When filling with reagents, the screw cap 3 is first screwed onto the pull-ring cap as a cap-within-a-cap assembly. Then, the reagents are filled into the bottle body 1. Finally, the pull-ring cap 2 and the bottle body 1 are welded together using a hot-melt welding device (such as an ultrasonic hot-melt welder).

[0028] Furthermore, the bottle body 1 has a first welding ring 11 with a flat upper surface at the bottle mouth, and a second welding ring 21 with a flat lower surface at the lower end of the pull ring cap 2; the second welding ring 21 is heat-fused to the first welding ring 11 to seal the bottle body 1.

[0029] like Figure 2-3 As shown, the first welding ring 11 is integrally formed at the mouth of the bottle body 1, with a thickness of 1.5-2.0 mm; the second welding ring 21 is integrally formed at the bottom of the pull-ring cap 2, with a thickness of 2.0-3.0 mm; the outer diameter of the second welding ring 21 is slightly smaller than the outer diameter of the first welding ring 11 to facilitate hot-melt welding, and the difference in outer diameter is generally 2.0-3.0 mm. The first welding ring 11 and the second welding ring 21 are hot-melt welded in a planar fit, which can form a stable and continuous primary sealing interface, effectively solving the problems of easy leakage of traditional single screw cap seals or insufficient long-term effectiveness of simple primary seals, and preventing the reagents in the bottle from being contaminated, volatilized or deteriorated.

[0030] Furthermore, the upper end of the pull ring cover 2 is provided with a sealing sheet 22, the top of the sealing sheet 22 is provided with a pull ring 23, and the bottom of the sealing sheet 22 is provided with an easy-pull groove 221 that facilitates the pull ring 23 to tear the sealing sheet 22.

[0031] like Figure 3-5 As shown, the sealing piece 22 is integrally formed about 10-15mm below the upper end of the pull ring cover 2. Its bottom is concave upward to form an easy-open groove 221 with an isosceles triangular cross-section. The easy-open groove 221 is annular, which makes it easy for the user to pull up the sealing piece 22 as a whole when pulling the pull ring 23. The pull ring 23 is integrally formed on one side of the top of the sealing piece 22 and is located inside the easy-open groove 221. The top of the pull ring 23 protrudes slightly from the outer wall of the screw cap 3 for threaded connection of the pull ring cover 2, making it easy for the user to pull up the pull ring 23.

[0032] Furthermore, the screw cap 3 is provided with a secondary sealing ring 31 inside, and the secondary sealing ring 31 and the outer wall of the screw cap 3 form a secondary sealing ring groove that fits the outer wall of the sealing pull ring cover 2; the width of the secondary sealing ring groove is ≥1.5mm and its depth is ≥1.5mm.

[0033] like Figure 3-5 As shown, the secondary sealing ring 31 is integrally formed inside the screw cap 3 and is a certain distance away from the outer wall of the screw cap 3 to form a secondary sealing ring groove (not clearly shown in the attached figure). This groove is used to seal the pull ring cover 2, which is connected to the outer wall of the screw cap 3. The secondary sealing ring 31 is inserted into the pull ring cover 2, and its outer wall fits against the inner wall of the pull ring cover 2, thereby constructing a second seal to prevent possible micro-leakage at the easy-open groove 221 and further improve the anti-contamination effect. In addition, an annular sealing gasket 4 is also provided at the bottom of the secondary sealing ring groove by interference fit to further improve the sealing effect.

[0034] Furthermore, the pull ring 23 is located inside the secondary sealing ring 31; the top of the sealing sheet 22 is provided with a reinforcing ring 222 to facilitate the complete tearing of the sealing sheet 22.

[0035] like Figure 3-5As shown, the reinforcing ring 222 is integrally formed on the top of the sealing sheet 22 and located inside the easy-open groove 221; the connection between the pull ring 23 and the sealing sheet 22 is located inside the easy-open groove 221 and outside the reinforcing ring 222. That is to say, the reinforcing ring 222 prevents the sealing sheet 22 from tearing inward, so that the sealing sheet 22 is torn at the easy-open groove 221 and is lifted up by the pull ring 23.

[0036] Furthermore, such as Figure 1 As shown, the outer wall of the screw cap 3 is provided with anti-slip texture 32, which makes it easy for users to tighten and open the screw cap 3; the anti-slip texture 32 is composed of several fine vertical lines arranged around the screw cap 3.

[0037] In summary, in this invention, the bottle body and pull-ring cap are made of the same type of plastic. The planar hot-melt welding of the first welding ring at the bottle mouth and the second welding ring on the pull-ring cap forms a stable and continuous primary sealing interface, effectively solving the problems of easy leakage or insufficient long-term effectiveness of traditional single screw cap seals, thus preventing contamination, evaporation, or deterioration of the reagents inside the bottle. The sealing plate at the top of the pull-ring cap, combined with the top pull ring, bottom easy-pull groove, and reinforcing ring, facilitates quick and complete opening of the reagent bottle by the user while ensuring the sealing performance of the sealing plate before opening. The secondary sealing ring groove formed by the secondary sealing ring inside the screw cap and the outer wall can be fitted onto the outer wall of the pull-ring cap. Combined with the design of the pull ring located inside the secondary sealing ring, a double sealing barrier is constructed, further enhancing the anti-contamination effect. Furthermore, the anti-slip texture on the outer wall of the screw cap facilitates easy tightening and opening. Overall, this invention balances the sealing reliability, ease of use, and anti-contamination capability of large-diameter reagent bottles, effectively meeting the needs of chemical experiments and industrial reagent storage scenarios.

[0038] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A large-diameter reagent plastic bottle, characterized in that: Includes a bottle body, a pull ring cap with external threads that is heat-fused to the bottle body for sealing the bottle body, and a screw cap with internal threads that is connected to the pull ring cap for sealing the pull ring cap; The bottle body has a first welding ring with a flat upper surface at the bottle mouth, and a second welding ring with a flat lower surface at the lower end of the pull-ring cap; the second welding ring is heat-fused to the first welding ring to seal the bottle body. The upper end of the pull ring cover is provided with a sealing plate, the top of the sealing plate is provided with a pull ring, and the bottom of the sealing plate is provided with an easy-pull groove to facilitate the pull ring to tear the sealing plate. The screw cap has a secondary sealing ring inside, which forms a secondary sealing ring groove with the outer wall of the screw cap, which fits onto the outer wall of the sealing pull ring cap.

2. The large-diameter reagent plastic bottle according to claim 1, characterized in that: The width of the secondary sealing ring groove is ≥1.5mm, and its depth is ≥1.5mm.

3. The large-diameter reagent plastic bottle according to claim 2, characterized in that: The pull ring is located inside the secondary sealing ring; the top of the sealing sheet is provided with a reinforcing ring to facilitate the complete tearing of the sealing sheet.

4. The large-diameter reagent plastic bottle according to claim 1, characterized in that: The bottle body and pull-tab cap are made of the same type of plastic.

5. The large-diameter reagent plastic bottle according to claim 1, characterized in that: The screw cap has anti-slip texture on its outer wall.

6. The large-diameter reagent plastic bottle according to claim 1, characterized in that: The inner diameter of the bottle opening is ≥30mm.

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