Long-acting dry packaging bottle and preparation process thereof

Abstract

The long-acting drying packaging bottle comprises a bottle body and a bottle opening, the bottle body is of a multi-layer composite structure and sequentially comprises an outer-layer bottle body, an interlayer cavity and an inner-layer bottle body from outside to inside, the interlayer cavity is filled with a composite drying agent, the inner-layer bottle body is made of a breathable barrier material, and the outer-layer bottle body is made of a plastic material. The inner side wall of the inner bottle body forms an inner cavity used for containing a packaged object, and the inner bottle body allows water vapor to penetrate but blocks dust and components of the composite drying agent. The inner-layer bottle body is made of one of thermoplastic polyurethane, polyether sulfone or ethylene-vinyl alcohol copolymer, and the thickness of the inner-layer bottle body ranges from 0.05 mm to 0.5 mm. According to the packaging bottle, the structure of the packaging bottle is optimized, the drying agent can be sealed in the independent interlayer cavity, the effective volume in the packaging bottle is not occupied, the space utilization rate of packaging is improved, meanwhile, the possibility that the drying agent leaks to pollute the content can be reduced, the drying efficiency and the drying effect can be improved, and no dead corner exists.

Description

Technical Field

[0001] This invention belongs to the field of packaging bottle technology, specifically relating to a long-lasting drying packaging bottle and its preparation process. Background Technology

[0002] In the fields of pharmaceuticals, food, precision electronics, chemicals, and cultural relic preservation, product quality is closely related to the humidity of the storage environment. Moisture is one of the main causes of deliquescence and spoilage of medicines, mold growth in food, oxidation and failure of electronic components, and corrosion of metal parts. Currently, the most common method of moisture prevention is to seal the product together with a separate desiccant packet (such as silica gel, montmorillonite, etc.) in the packaging.

[0003] However, while this method is simple, it also has several problems: 1. The desiccant packets may break due to squeezing or friction, causing desiccant particles or powder to leak and contaminate the product. 2. The desiccant packets occupy the effective volume inside the packaging, reducing the space available for product storage. 3. The desiccant packets are usually piled up at the bottom of the packaging, limiting air convection with the upper part of the packaging, resulting in uneven drying. Furthermore, conventional desiccants have limited moisture absorption capacity and are prone to rapid saturation in high-temperature and high-humidity environments, losing their drying ability and failing to meet the needs of long-term storage.

[0004] Existing technologies have also seen some attempts to integrate desiccants into the packaging materials themselves. For example, some solutions mix the desiccant into plastic masterbatch and then blow-molde it into a bottle. However, the desiccant is tightly wrapped by the polymer material, and its effective adsorption sites on the surface are largely blocked, resulting in a sharp decrease in moisture absorption rate and capacity, and negligible drying effect. In addition, the desiccant may react with the plastic substrate, affecting the mechanical properties and transparency of the packaging bottle.

[0005] Therefore, in order to address the above-mentioned technical problems, it is necessary to provide a long-lasting drying packaging bottle and its preparation process.

[0006] The information disclosed in this background section is intended only to enhance the understanding of the overall background of the invention and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0007] The purpose of this invention is to provide a long-lasting drying packaging bottle and its preparation process, which can solve the problems mentioned above.

[0008] To achieve the above objectives, a specific embodiment of the present invention provides a long-lasting desiccant packaging bottle, comprising a bottle body and a bottle mouth. The bottle body has a multi-layer composite structure, comprising, from the outside to the inside: an outer bottle body, a sandwiched chamber, and an inner bottle body. The sandwiched chamber is filled with a composite desiccant. The inner bottle body is made of a breathable barrier material, and its inner sidewall forms an inner cavity for accommodating the packaged item. The inner bottle body allows water vapor to pass through but blocks dust and components of the composite desiccant.

[0009] In one or more embodiments of the present invention, the inner bottle body is made of one of thermoplastic polyurethane, polyethersulfone, or ethylene-vinyl alcohol copolymer, and the thickness of the inner bottle body is 0.05mm to 0.5mm.

[0010] In one or more embodiments of the present invention, the composite desiccant comprises the following components by mass percentage: 40% to 60% modified molecular sieve, 20% to 35% silica gel, 10% to 20% lithium chloride, and 5% to 10% inorganic binder.

[0011] In one or more embodiments of the present invention, the modified molecular sieve is a 13X type molecular sieve that has undergone alkali metal ion exchange treatment and has a specific surface area of ​​not less than 600 m² / g.

[0012] In one or more embodiments of the present invention, a support frame is provided in the interlayer cavity. The support frame is a porous mesh or honeycomb structure. The material of the support frame is the same as that of the outer bottle body, and it is integrally injection molded with the outer bottle body.

[0013] In one or more embodiments of the present invention, a filling port communicating with the interlayer chamber is provided on the side wall of the outer bottle body, and the filling port is sealed by a sealing cap.

[0014] In one or more embodiments of the present invention, a sealing inner plug and a threaded bottle cap are provided at the bottle opening, the sealing inner plug being made of an elastic material and having an interference fit with the inner wall of the bottle opening.

[0015] A process for preparing a long-lasting drying packaging bottle includes the following steps:

[0016] S1. Prepare the outer bottle and the inner bottle separately;

[0017] S2. Preparation of composite desiccant;

[0018] S3. Place the inner bottle body into the mold inside the outer bottle body, so that the two are fused together at the bottle mouth and the interlayer cavity is formed in the bottle body.

[0019] S4. A measured amount of composite desiccant is filled into the interlayer chamber through the filling port;

[0020] S5. Seal the filling port;

[0021] S6. Install the sealing inner plug and threaded bottle cap.

[0022] In one or more embodiments of the present invention, in S1, the inner bottle body is prepared by a drop-in rotational molding method, and S1 specifically includes the following steps:

[0023] S101. Inject liquid breathable barrier material into a specific mold;

[0024] S102. The mold rotates and is heated around two vertical axes, so that the material is evenly attached to the inner wall of the mold and solidified under the action of centrifugal force and gravity.

[0025] In one or more embodiments of the present invention, in S2, the preparation of the composite desiccant specifically includes the following steps:

[0026] S201. After mixing the components in proportion, add an appropriate amount of deionized water to granulate and form spherical particles with a diameter of 1mm to 3mm.

[0027] S202 is dried and activated at 120℃~150℃ for 2~4 hours.

[0028] Compared with the prior art, the long-lasting drying packaging bottle and its preparation process of the present invention optimize the structure of the packaging bottle, which can seal the desiccant in an independent interlayer cavity without occupying the effective volume inside the packaging bottle, thereby improving the space utilization rate of the packaging. At the same time, it can also reduce the possibility of desiccant leakage and contamination of the contents, and improve the drying efficiency and drying effect without any dead corners. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a cross-sectional view of a long-lasting drying packaging bottle according to an embodiment of the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the structure at point A in the middle;

[0032] Figure 3 This is a perspective view of a long-lasting drying packaging bottle according to an embodiment of the present invention;

[0033] Figure 4This is a process flow diagram of the preparation of a long-lasting drying packaging bottle according to one embodiment of the present invention.

[0034] Explanation of key figure labels:

[0035] 1-Bottle body, 101-Outer bottle body, 1011-Filling port, 1012-Sealing cap, 102-Interlayer chamber, 1021-Supporting frame, 103-Inner bottle body, 2-Bottle mouth, 201-Sealing inner plug, 202-Threaded bottle cap. Detailed Implementation

[0036] To enable those skilled in the art to better understand the technical solutions in this disclosure, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this disclosure.

[0037] like Figures 1 to 3 As shown, a long-lasting desiccant packaging bottle according to one embodiment of the present invention includes a bottle body 1 and a bottle mouth 2. The bottle body 1 has a multi-layer composite structure, which includes, from the outside to the inside: an outer bottle body 101, a sandwich chamber 102 and an inner bottle body 103. The sandwich chamber 102 is filled with a composite desiccant. The inner bottle body 103 is made of a breathable barrier material, and its inner sidewall forms an inner cavity for containing the packaged item. The inner bottle body 103 allows water vapor to pass through but blocks the dust and components of the composite desiccant.

[0038] This application achieves physical isolation between the composite desiccant and the packaged product by setting up an independent sandwich chamber 102 to accommodate the composite desiccant, fundamentally solving the problem of potential damage or leakage of traditional desiccant packaging bags, which could contaminate the contents. The inner bottle 103 acts as a selective barrier, allowing only water vapor to pass through, ensuring the drying effect while protecting the safety and purity of the product.

[0039] Optionally, the inner bottle 103 is made of thermoplastic polyurethane, polyethersulfone, or ethylene-vinyl alcohol copolymer, and its thickness is 0.05 mm to 0.5 mm. This application specifies the specific material and thickness range of the inner bottle 103. Thermoplastic polyurethane, polyethersulfone, or ethylene-vinyl alcohol copolymer all have good air permeability and excellent barrier properties against dust, organic matter, etc. By limiting the thickness of the inner bottle 103, sufficient mechanical strength can be ensured for molding and withstanding the pressure of the contents, while achieving the optimal water vapor permeation rate, thus balancing drying efficiency and structural stability.

[0040] The composite desiccant comprises the following components by mass percentage: 40%–60% modified molecular sieve, 20%–35% silica gel, 10%–20% lithium chloride, and 5%–10% inorganic binder. Modified molecular sieve exhibits strong adsorption capacity in low-humidity environments. Silica gel absorbs moisture rapidly, providing initial drying assurance. Lithium chloride is a highly efficient hygroscopic salt that can significantly reduce ambient humidity. The inorganic binder ensures the formability and strength of the desiccant particles, preventing pulverization.

[0041] Furthermore, the modified molecular sieve is a 13X type molecular sieve treated with alkali metal ion exchange, with a specific surface area of ​​not less than 600 m² / g. This application uses a 13X type molecular sieve modified with alkali metal ions, whose pore size and surface electric field are optimized, resulting in stronger selective adsorption capacity and higher adsorption capacity for water molecules. The large specific surface area provides more adsorption sites, further improving the efficiency and service life of the composite desiccant.

[0042] like Figures 1 to 3 As shown, a support frame 1021 is provided in the interlayer chamber 102. The support frame 1021 has a porous mesh or honeycomb structure. The material of the support frame 1021 is the same as that of the outer bottle body 101, and it is integrally injection molded with the outer bottle body 101.

[0043] The support frame 1021 prevents the interlayer chamber 102 from collapsing and deforming the inner bottle 103 under external pressure or internal vacuum, thus ensuring the volume of the inner cavity and the product's aesthetics. Furthermore, the integrated molding process between the support frame 1021 and the outer bottle 101 enhances the overall structural strength of the packaging bottle and simplifies assembly. The porous structure of the support frame 1021 ensures uniform distribution of the composite desiccant within the interlayer and unobstructed moisture diffusion channels.

[0044] like Figures 1 to 2 As shown, a filling port 1011 communicating with the interlayer chamber 102 is provided on the side wall of the outer bottle 101. The filling port 1011 is sealed by a sealing cap 1012. The filling port 1011 provides a convenient channel for filling the composite desiccant, making the production process more flexible and controllable. Sealing the filling port 1011 with the sealing cap 1012 ensures a reliable airtight seal, ensuring that the composite desiccant will not escape from the interlayer chamber 102 within its shelf life, while also preventing external moisture from entering the interlayer chamber 102 from the filling port 1011.

[0045] like Figure 1As shown, a sealing inner plug 201 and a threaded cap 202 are provided at the bottle mouth 2. The sealing inner plug 201 is made of elastic material and is interference-fitted with the inner wall of the bottle mouth 2. Through the cooperation of the sealing inner plug 201 and the threaded cap 202, the entire packaging bottle is provided with extremely high overall sealing performance, minimizing the exchange of moisture between the bottle's internal space and the external environment. The interlayer drying is only activated when the cap is opened for use, thereby greatly extending the product's effective shelf life.

[0046] like Figure 4 As shown, a process for preparing a long-lasting drying packaging bottle includes the following steps:

[0047] S1. Prepare the outer bottle 101 and the inner bottle 103 respectively;

[0048] S2. Preparation of composite desiccant;

[0049] S3. Place the inner bottle 103 into the mold inside the outer bottle 101, so that the two are fused together at the bottle mouth 2, and form a sandwich chamber 102 in the bottle body 1.

[0050] S4. A measured amount of composite desiccant is filled into the interlayer chamber 102 through the filling port 1011;

[0051] S5, Seal the filling port 1011;

[0052] S6. Install the sealing inner plug 201 and the threaded bottle cap 202.

[0053] In S1, the inner bottle body 103 is prepared by a drop-in rotational molding method. S1 specifically includes the following steps:

[0054] S101. Inject liquid breathable barrier material into a specific mold;

[0055] S102. The mold rotates and is heated around two vertical axes, so that the material is evenly attached to the inner wall of the mold and solidified under the action of centrifugal force and gravity.

[0056] This application utilizes a drop-in-rotational molding method to prepare the inner bottle body 103, ensuring consistent wall thickness and thus guaranteeing uniform water vapor permeation, avoiding localized drying blind spots. Furthermore, this method can mold bottles with complex structures, offering a high degree of design freedom.

[0057] In S2, the preparation of the composite desiccant specifically includes the following steps:

[0058] S201. After mixing the components in proportion, add an appropriate amount of deionized water to granulate and form spherical particles with a diameter of 1mm to 3mm.

[0059] S202 is dried and activated at 120℃~150℃ for 2~4 hours.

[0060] Example 1

[0061] Long-lasting desiccant packaging bottles for pharmaceutical packaging

[0062] The outer bottle body 101 is made of food-grade polyethylene terephthalate through injection molding. The outer bottle body 101 has a wall thickness of approximately 0.3 mm and is cylindrical in shape. A filling port 1011 with a diameter of approximately 5 mm is provided at the bottom of the bottle body 101. The supporting frame 1021 is integrally injection molded with the outer bottle body 101, and has a uniformly distributed honeycomb structure with a height consistent with the thickness of the interlayer chamber 102.

[0063] The inner bottle 103 is made of medical-grade thermoplastic polyurethane through drop-in rotational molding. The molded inner bottle 103 has a uniform wall thickness of approximately 0.1 mm. Thermoplastic polyurethane material has good biocompatibility, elasticity, and excellent water vapor permeability.

[0064] The interlayer chamber 102 is formed by fusing the outer bottle body 101 and the inner bottle body 103 at the bottle mouth 2, and its thickness is about 2 mm.

[0065] The composite desiccant comprises the following components by mass percentage: 50% potassium ion modified 13X molecular sieve (specific surface area of ​​650 m² / g), 25% blue indicator silica gel, 15% lithium chloride, and 10% attapulgite. After mixing the above raw materials, granulation is performed to form spherical particles with a diameter of approximately 1.5 mm, followed by activation and drying at 130°C for 3 hours.

[0066] The inner sealing plug 201 is made of food-grade silicone, and the threaded cap 202 is made of PP material.

[0067] Experimental Verification: A comparative test was conducted between the packaged bottle and a regular PET bottle of the same size containing an individual 3-gram packet of silica gel desiccant. A humidity sensor was placed inside the bottle in a constant temperature and humidity chamber at 25°C and 75% relative humidity. The humidity inside the regular PET bottle rose to over 60% within 7 days, while the humidity inside the packaged desiccant bottle in this embodiment remained stably below 15% after 90 days. This demonstrates the exceptionally superior long-lasting drying capability of the packaged desiccant bottle in this embodiment.

[0068] Example 2

[0069] Moisture-proof packaging bottles for high-end electronic components

[0070] The basic structure is the same as in Example 1, except that a permanent antistatic agent is incorporated into the PET raw material of the outer bottle 101. The inner bottle 103 is made of polyethersulfone with a thickness of 0.08 mm. Polyethersulfone not only has excellent water vapor permeability, but also excellent high temperature resistance and dimensional stability, and produces very few precipitates, thus avoiding contamination of precision components.

[0071] The composite desiccant comprises the following components by mass percentage: 55% sodium ion modified 13X molecular sieve, 20% silica gel, 18% lithium chloride, and 7% silica sol.

[0072] Experimental verification shows that the packaging bottle in this embodiment can provide reliable dry protection for expensive electronic components for several years, which is far superior to the traditional aluminum foil moisture-proof bags and desiccant packets, and is easy to use and repeatedly open and close.

[0073] Example 3

[0074] A transparent drying bottle for preserving high-grade tea. The outer bottle body 101 is made of high-transparency PET. The inner bottle body 103 is made of high-transparency ethylene-vinyl alcohol copolymer with a thickness of 0.15mm. Ethylene-vinyl alcohol copolymer has extremely high gas barrier properties while allowing moisture to pass through, thus preventing moisture and preserving aroma.

[0075] The composite desiccant comprises the following components by mass percentage: 70% white spherical silica gel, 25% modified molecular sieve, and a small amount of binder (5%).

[0076] Experimental verification shows that the packaging bottle in this embodiment not only effectively prevents tea from becoming damp and moldy, but also effectively blocks oxygen, slows down the oxidation of tea, and preserves the aroma of tea. Its completely transparent appearance allows the color and shape of the tea to be fully displayed, greatly enhancing the product's display value.

[0077] In summary, this application optimizes the packaging bottle structure, sealing the desiccant within an independent interlayered cavity, without occupying the effective volume inside the packaging bottle, thus improving the space utilization of the packaging. It also reduces the possibility of desiccant leakage and contamination of the contents, and improves drying efficiency and effect without any dead corners.

[0078] It will be apparent to those skilled in the art that this disclosure is not limited to the details of the exemplary embodiments described above, and that this disclosure can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of this disclosure is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this disclosure. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0079] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A long-acting dry-pack bottle characterized by, The bottle comprises a bottle body and a bottle mouth, the bottle body is a multi-layer composite structure, from outside to inside, comprising an outer bottle body, a sandwich cavity and an inner bottle body, the sandwich cavity is filled with a composite desiccant, the inner bottle body is made of a breathable barrier material, the inner side wall of which constitutes an inner cavity for containing the packaged objects, and the inner bottle body allows water vapor to pass through but blocks the dust and components of the composite desiccant.

2. The long-acting dry-pack bottle of claim 1, wherein, The material of the inner bottle body is one of thermoplastic polyurethane, polyether sulfone or ethylene-vinyl alcohol copolymer, and the thickness of the inner bottle body is 0.05mm-0.5mm.

3. The long-acting dry-pack bottle of claim 1, wherein, The composite desiccant comprises the following components in percentage by mass: modified molecular sieve 40%-60%, silica gel 20%-35%, lithium chloride 10%-20%, and inorganic binder 5%-10%.

4. The long-acting dry-pack bottle of claim 3, wherein, The modified molecular sieve is a 13X type molecular sieve treated by alkali metal ion exchange, and the specific surface area thereof is not less than 600m² / g.

5. The long-acting dry-pack bottle of claim 1, wherein, A support framework is arranged in the sandwich cavity, the support framework is a porous net-like or honeycomb-like structure, the material of the support framework is the same as that of the outer bottle body, and the support framework is integrally injection molded with the outer bottle body.

6. The long-acting dry-pack bottle of claim 1, wherein, A filling port is formed in the side wall of the outer bottle body and communicates with the sandwich cavity, and the filling port is sealed by a sealing cover.

7. The long-acting dry-pack bottle of claim 1, wherein, A sealing inner plug and a threaded bottle cap are arranged at the bottle mouth, the sealing inner plug is made of an elastic material and is in interference fit with the inner wall of the bottle mouth.

8. A process for the preparation of a long-acting dry pack bottle as claimed in claim 6, characterized in that, The method comprises the following steps: S1, preparing an outer bottle body and an inner bottle body respectively; S2, preparing a composite desiccant; S3, placing the inner bottle body in a mold inside the outer bottle body, so that the two are fused and connected at the bottle mouth, and the sandwich cavity is formed at the bottle body part; S4, filling a certain amount of the composite desiccant into the sandwich cavity through the filling port; S5, sealing the filling port; S6, installing the sealing inner plug and the threaded bottle cap.

9. The process for preparing a long-acting dry pack bottle according to claim 8, wherein In S1, the inner bottle body is prepared by a drip-rotational molding method, and S1 specifically comprises the following steps: S101, injecting a liquid breathable barrier material into a specific mold; S102, rotating the mold around two vertical axes and heating, so that the material is uniformly attached to the inner wall of the mold under the action of centrifugal force and gravity and is solidified and formed.

10. The process for preparing a long-acting dry pack bottle according to claim 8, wherein, In S2, the preparation of the composite desiccant specifically comprises the following steps: S201, after mixing the components in proportion, adding a proper amount of deionized water for granulation to form spherical particles with a diameter of 1mm-3mm; S202, drying and activating at 120°C-150°C for 2-4 hours.

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