A breast milk collection lyophilization bag

Abstract

The utility model provides a kind of breast milk collection freeze-drying bag, the breast milk collection freeze-drying bag includes bag body and screw thread bag head, the top of the bag body is provided with the screw thread bag head, the screw thread bag head is used to screw joint breast pump;The top of the bag body is also provided with sealing outlet, the sealing outlet is close to the screw thread bag head setting, and the sealing outlet is used to shear and pour out material;The bag body includes inner bag and outer bag by inside from outside, the outer edge of the inner bag and the inner edge of the outer bag are attached, and the inner bag is used to store material.The utility model is through the structural design of breast milk collection freeze-drying bag, integrates breast milk collection and breast milk freeze-drying function, can simplify the cumbersome step of multiple transfer, can also reduce the risk of environmental microbial pollution, better guarantee the quality of breast milk freeze-dried powder.

Description

Technical Field

[0001] This utility model belongs to the field of freeze-drying collection technology and relates to a freeze-drying bag for collecting breast milk. Background Technology

[0002] Freeze-drying of breast milk is a technology that transforms liquid breast milk into a solid state under a vacuum, aseptic, and low-temperature environment. Then, at an appropriate temperature, the water content in the breast milk is sublimated and removed, resulting in breast milk powder. Converting liquid breast milk into solid freeze-dried powder significantly extends its shelf life while preserving its nutritional components.

[0003] Currently, breast milk collection bags that come with breast pumps mainly use a single-layer antibacterial material and a single-slot design, while freeze-drying bags use a hydrophobic and breathable membrane on the top and a single-slot design. The existing process usually requires transferring liquid breast milk from the breast pump to the collection bag, and then to the freeze-drying bag for processing.

[0004] Because freeze-dried breast milk powder is used directly for infant feeding, extremely high hygiene standards are required. However, current technologies still have some key issues. For example, liquid breast milk needs to be transferred from a breast pump into a collection bag before being transferred to the freeze-drying container. This process requires repeatedly opening the container's inlet and outlet, increasing the probability of contamination by environmental microorganisms. Studies show that approximately 30% of breast milk contamination occurs during the transfer step. Both existing collection bags and freeze-drying bags use a single-channel material inlet and outlet, requiring repeated opening and closing of the same interface for filling and dispensing, which easily leads to residual breast milk spoilage and bacterial growth. The freeze-drying bag's outer membrane often uses a breathable membrane to maintain pressure balance, but this material can only block some microorganisms and cannot actively inhibit bacterial growth. Escherichia coli and Staphylococcus aureus are common in household refrigerator environments and can survive on the surface of the freeze-drying bag and penetrate into its interior.

[0005] Therefore, there is an urgent need to design a freeze-dried bag for collecting breast milk to overcome the shortcomings of existing technologies and meet the needs of practical applications. Utility Model Content

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a breast milk collection freeze-drying bag, particularly a disposable, integrated, non-contact, and contamination-proof breast milk collection freeze-drying bag for use with breast pumps. This invention integrates breast milk collection and freeze-drying functions through structural design, simplifying the cumbersome steps of multiple transfers, reducing the risk of environmental microbial contamination, and better ensuring the quality of the freeze-dried breast milk powder.

[0007] To achieve this objective, the present invention adopts the following technical solution:

[0008] This utility model provides a breast milk collection freeze-dried bag, which includes a bag body and a threaded bag head. The threaded bag head is provided on the top of the bag body and is used to screw on a breast pump.

[0009] The top of the bag body is also provided with a sealing outlet, which is located near the threaded bag head and is used to cut and pour out materials;

[0010] The bag body includes an inner bag and an outer bag extending from the inside out. The outer edge of the inner bag and the inner edge of the outer bag are fitted together. The inner bag is used to store materials.

[0011] This invention integrates the functions of breast milk collection and freeze-drying through the structural design of the breast milk collection freeze-drying bag. This simplifies the tedious steps of multiple transfers, reduces the risk of environmental microbial contamination, and better ensures the quality of the breast milk freeze-dried powder.

[0012] As a preferred technical solution of this utility model, the inner bag includes an upper film, a lower film, and a bottom film. The upper film, the bottom film, and the lower film are connected in sequence to form a cavity for storing materials. One side of the upper film and one side of the lower film are heat-pressed together, and the other side of the upper film and the other side of the lower film are connected through the bottom film. The bottom film is used to support the upper film and the lower film to be placed vertically.

[0013] As a preferred technical solution of this utility model, the upper film is an expanded polytetrafluoroethylene film.

[0014] Furthermore, the lower film is a low-density polyethylene film, used to adhere to the freeze dryer's plates.

[0015] Furthermore, the base film is a polyethylene terephthalate film.

[0016] As a preferred technical solution of this utility model, the thickness of the upper film is 0.1mm~0.2mm, for example, it can be 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0017] Furthermore, the thickness of the lower film is 0.15mm to 0.25mm, for example, it can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0018] As a preferred technical solution of this utility model, the outer bag includes an outer film and an outer bottom film, the outer film is attached to the upper film and the lower film, and the outer bottom film is attached to the bottom film.

[0019] As a preferred technical solution of this utility model, the outer membrane is an antibacterial polyethylene terephthalate membrane.

[0020] Furthermore, the outer bottom film is an antibacterial polyethylene terephthalate film.

[0021] In a preferred embodiment of this invention, the threaded bag head and the bag body are fixedly connected by heat pressing, and the interior of the threaded bag head is connected to the inner bag.

[0022] As a preferred technical solution of this utility model, a threaded cap is screwed onto the side of the threaded bag head away from the bag body.

[0023] In a preferred embodiment of this invention, the width of the sealed outlet is smaller than the width of the inner bag.

[0024] As a preferred technical solution of this utility model, the outer surface of the outer bag is provided with scale markings.

[0025] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] This invention integrates the functions of breast milk collection and freeze-drying through the structural design of the breast milk collection freeze-drying bag. This simplifies the tedious steps of multiple transfers, reduces the risk of environmental microbial contamination, and better ensures the quality of the breast milk freeze-dried powder. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A front structural diagram of a breast milk collection freeze-drying bag provided in a specific embodiment of this utility model;

[0030] Figure 2 A schematic diagram showing the structure of a breast milk collection freeze-dried bag with one corner of the outer bag torn open, according to a specific embodiment of this utility model;

[0031] Figure 3A schematic diagram of the threaded bag head in a freeze-dried breast milk collection bag provided for a specific embodiment of this utility model;

[0032] Figure 4 A schematic diagram showing a breast milk collection freeze-drying bag placed on a freeze dryer plate according to a specific embodiment of the present invention;

[0033] Figure 5 A schematic diagram of the bottom film in a breast milk collection freeze-drying bag provided for a specific embodiment of this utility model;

[0034] Among them, 1-outer bag; 2-inner bag; 3-threaded bag head; 4-gradient mark; 5-sealed outlet; 6-upper film; 7-lower film; 8-bottom film. Detailed Implementation

[0035] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention 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 invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0036] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0037] It should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" 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 mechanical connection or an electrical 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.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] In one specific embodiment, the present invention provides a freeze-dried bag for collecting breast milk, such as... Figure 1 As shown, the breast milk collection freeze-dried bag includes a bag body and a threaded bag head 3. The top of the bag body is provided with a threaded bag head 3, which is used to screw on a breast pump. The top of the bag body is also provided with a sealing outlet 5, which is located near the threaded bag head 3 and is used to cut and pour out the material. The bag body includes an inner bag 2 and an outer bag 1 extending from the inside out. The outer edge of the inner bag 2 and the inner edge of the outer bag 1 are fitted together. The inner bag 2 is used to store the material.

[0040] It should be noted that the threaded bag head 3 in this utility model can be designed with reference to the threaded cap of a baby bottle, allowing it to engage with a breast pump. Before pumping, the inlet is sealed with a screw cap. During pumping, the screw cap is unscrewed, and the inlet connects to the lower end of the breast pump for collection. After collection, the breast pump is removed, and the inlet is sealed again with the screw cap. The inlet and sealed outlet 5 are not located in the same place. After freeze-drying, the upper film 6 and lower film 7 of the breast milk collection freeze-dried bag are tapped or gently kneaded to disperse the product powder inside. Then, the freeze-dried bag is cut along the indicator line at the sealed outlet 5, and the freeze-dried material is poured into the packaging machine by inverting the bag. This separate inlet and outlet design avoids contamination caused by using the same opening for both. Throughout the entire process between breast milk collection and freeze-dried material collection, only sublimation gas escapes, while external contaminants cannot enter the freeze-dried bag, ensuring product hygiene.

[0041] It should be noted that the connection between the inner bag 2 and the outer bag 1 in this utility model adopts a peel-and-fit structure, such as by dry lamination. The operating parameters are a drying wind speed of 35 m / s and a lamination temperature of 70~90℃. An adhesive can be selected, and polyurethane adhesive can be selected. The adhesive layer formed after curing has excellent oil resistance, high temperature resistance and high-strength bonding effect, which can well cope with the long-term immersion of breast milk, a fat-containing liquid.

[0042] In some embodiments, the inner bag 2 includes an upper film 6, a lower film 7, and a bottom film 8. The upper film 6, the bottom film 8, and the lower film 7 are connected in sequence to form a cavity for storing materials. One side of the upper film 6 and one side of the lower film 7 are heat-pressed together, and the other side of the upper film 6 and the other side of the lower film 7 are connected through the bottom film 8. The bottom film 8 is used to support the upper film 6 and the lower film 7 to be placed vertically.

[0043] It should be noted that the hot pressing parameters for the hot pressing connection between one side of the upper film and one side of the lower film in this invention can be a hot pressing temperature of 120~150℃, a hot pressing pressure of 0.2~0.4MPa, and a hot pressing time of 0.5~1.5s; the hot pressing temperature needs to be uniform to avoid overheating that could cause the material to degrade and become brittle.

[0044] It should be noted that the bottom film 8 of this utility model is designed so that the breast milk collection freeze-drying bag can stand upright without tipping over, relying on the support of the bottom film 8.

[0045] In some embodiments, the upper membrane 6 is an expanded polytetrafluoroethylene membrane.

[0046] The upper membrane 6 in this invention is selected as expanded polytetrafluoroethylene membrane because it has hydrophobic and breathable properties, mainly has a fine porous structure, is suitable for liquid sealing, does not affect the escape of sublimation gas during freeze drying, and can block the invasion of external microorganisms. When freeze-drying sterile raw materials, it can maintain the sterility of the product.

[0047] In some embodiments, the lower film 7 is a low-density polyethylene film used to adhere to the freeze dryer plates.

[0048] In this invention, the lower film 7 is selected as a low-density polyethylene film because it has good flexibility and extensibility, and is resistant to both low and high temperatures. During freeze-drying, it can be tightly bonded to the freeze dryer plates, allowing the freeze-drying solution to be heated efficiently and uniformly, thus improving freeze-drying efficiency and uniformity.

[0049] In some embodiments, the base film 8 is a polyethylene terephthalate film.

[0050] In this invention, the bottom film 8 is selected as a polyethylene terephthalate film because it has good tensile and impact resistance, is not easily worn, can withstand external forces during transportation and storage, is non-toxic and odorless, meets food packaging hygiene standards, can directly contact breast milk, ensures breast milk safety, and avoids the migration of harmful substances; it also has excellent barrier properties against oxygen and water vapor, effectively delaying the oxidation and deterioration of breast milk, preventing cross-contamination of flavors, and maintaining the freshness of breast milk.

[0051] In some embodiments, the thickness of the upper film 6 is 0.1 mm to 0.2 mm, for example, it can be 0.1 mm, 0.11 mm, 0.12 mm, 0.13 mm, 0.14 mm, 0.15 mm, 0.16 mm, 0.17 mm, 0.18 mm, 0.19 mm, 0.2 mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0052] In this invention, the thickness of the upper membrane 6 is 0.1mm to 0.2mm. This range is beneficial for balancing air permeability and microbial barrier properties. It ensures that the membrane can effectively block microorganisms while allowing water vapor molecules (approximately 0.0004 micrometers) to pass through quickly. If the thickness is less than this range, it may result in insufficient mechanical strength, easy breakage, and reduced microbial barrier properties. If the thickness is greater than this range, it may result in reduced air permeability, prolonged freeze-drying time, and increased costs.

[0053] In some embodiments, the thickness of the lower film 7 is 0.15mm to 0.25mm, for example, it can be 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, 0.2mm, 0.21mm, 0.22mm, 0.23mm, 0.24mm, 0.25mm, etc., but it is not limited to the listed values. Other unlisted values ​​within this range are also applicable.

[0054] The thickness of the lower membrane 7 in this invention is 0.15mm to 0.25mm. This range is beneficial for balancing flexibility, low-temperature resistance, and thermal conductivity. The thickness of the lower membrane 7 should not be too large to reduce thermal resistance and ensure that the breast milk is heated evenly. However, the lower membrane 7 also needs a certain thickness to provide puncture resistance, tear resistance, and resistance to low-temperature impact, ensuring that it does not break at the freeze-drying temperature. If the thickness is less than this range, it may lead to easy puncture and leakage, uneven thermal conduction, and easy brittleness at low temperatures. If the thickness is greater than this range, it may lead to decreased flexibility, increased thermal resistance, and reduced freeze-drying efficiency.

[0055] In some embodiments, the outer bag 1 includes an outer film and an outer bottom film, the outer film is attached to the upper film 6 and the lower film 7, and the outer bottom film is attached to the bottom film 8.

[0056] In some embodiments, the outer membrane is an antibacterial polyethylene terephthalate membrane.

[0057] In some embodiments, the outer bottom film is an antibacterial polyethylene terephthalate film.

[0058] In this invention, the outer and bottom membranes are made of antibacterial polyethylene terephthalate (PET) film because it possesses excellent antibacterial activity and non-dissolving properties, achieving inhibition rates of over 98.0% and 99.9% against Escherichia coli and Staphylococcus aureus, respectively. This ensures that food / pharmaceuticals are not contaminated by microorganisms during storage and transportation, extends shelf life, and guarantees safety and efficacy. During the collection, storage, and transportation of breast milk, the outer and bottom membranes play a protective role, preventing bacterial contamination. Before the freeze-drying step begins, the outer membrane is peeled off along the peeling opening at the edge, leaving the inner bag 2 suitable for the freeze-drying process.

[0059] In some embodiments, the threaded bag head 3 and the bag body are fixedly connected by heat pressing, and the interior of the threaded bag head 3 is connected to the inner bag 2.

[0060] In some embodiments, a threaded cap is screwed onto the side of the threaded bag head 3 away from the bag body.

[0061] In some embodiments, the width of the sealed outlet 5 is smaller than the width of the inner bag 2.

[0062] In this invention, the width of the sealed outlet 5 is smaller than the width of the inner bag 2 because this range helps to increase the resistance when the freeze-dried powder flows out, making the flow rate more stable and easier to manage. This is especially important for accurate metering or avoiding splashing caused by impacting the collection container. On the other hand, the smaller outlet can act as a natural guide, making the direction of the powder flow more concentrated and easier to align with the collection container, reducing powder residue in the bag, and preventing spillage, which is crucial for aseptic operation.

[0063] In some embodiments, the outer surface of the outer bag 1 is provided with scale markings 4.

[0064] It should be noted that the outer surface of the outer bag 1 in this utility model is provided with scale lines 4 to indicate the amount of milk taken by the breastfeeding mother, so as to avoid exceeding the storage limit and affecting the freeze-drying efficiency.

[0065] For example, this utility model provides a method of using a breast milk collection freeze-dried bag, including:

[0066] First, remove the screw cap, then connect the threaded bag head 3 with the internal threads to the three-way connector of the breast pump, inject breast milk, and then refrigerate.

[0067] Before freeze-drying, tear off the antibacterial outer bag 1 along the peeling opening on the edge. The outer bag 1 serves to protect breast milk during collection, storage, and transportation, preventing bacterial contamination. After tearing off the outer bag 1, the breast milk freeze-drying collection bag is fed into the freeze dryer plate using manual or automated mechanical devices. The lower film 7 is placed face down and tightly adhered to the freeze dryer plate, ensuring efficient and uniform heating of the freeze-drying solution. The upper film 6 is placed face up, preventing the escape of sublimated gases during freeze-drying, retaining the freeze-dried material inside the freeze-drying bag, and blocking the invasion of external microorganisms.

[0068] After freeze-drying, remove the breast milk freeze-dried collection bag from the freeze dryer. Break the product inside into powder by tapping or gently kneading the lower film 7 and upper film 6 of the freeze-dried bag. Cut the freeze-dried bag along the indicator line at the sealed outlet 5 to transfer the freeze-dried material to the next process.

[0069] Example 1

[0070] This embodiment provides a freeze-dried bag for collecting breast milk, wherein:

[0071] The breast milk collection freeze-dried bag includes a bag body and a threaded bag head 3. The top of the bag body is provided with a threaded bag head 3, which is used to screw on a breast pump. The top of the bag body is also provided with a sealing outlet 5, which is located near the threaded bag head 3 and is used to cut and pour out the material. The bag body includes an inner bag 2 and an outer bag 1 extending from the inside out. The outer edge of the inner bag 2 and the inner edge of the outer bag 1 are fitted together. The inner bag 2 is used to store the material.

[0072] The inner bag 2 includes an upper film 6, a lower film 7, and a bottom film 8. The upper film 6, the bottom film 8, and the lower film 7 are connected in sequence to form a cavity for storing materials. One side of the upper film 6 and one side of the lower film 7 are heat-pressed together, and the other side of the upper film 6 and the other side of the lower film 7 are connected through the bottom film 8. The bottom film 8 is used to support the upper film 6 and the lower film 7 to be placed vertically.

[0073] The upper film 6 is an expanded polytetrafluoroethylene film, the lower film 7 is a low-density polyethylene film used to adhere to the freeze dryer plates, and the bottom film 8 is a polyethylene terephthalate film.

[0074] The thickness of the upper film 6 is 0.1 mm, and the thickness of the lower film 7 is 0.15 mm.

[0075] The outer bag 1 includes an outer film and an outer bottom film. The outer film is attached to the upper film 6 and the lower film 7, and the outer bottom film is attached to the bottom film 8. The outer film is an antibacterial polyethylene terephthalate film, and the outer bottom film is an antibacterial polyethylene terephthalate film.

[0076] The threaded bag head 3 and the bag body are fixedly connected by heat pressing, and the inside of the threaded bag head 3 is connected to the inner bag 2. A threaded cap is screwed onto the side of the threaded bag head 3 away from the bag body.

[0077] The width of the sealed outlet 5 is smaller than the width of the inner bag 2.

[0078] The outer surface of the outer bag 1 is provided with scale markings 4.

[0079] In summary, this utility model integrates the functions of breast milk collection and freeze-drying through the structural design of the breast milk collection freeze-drying bag. This simplifies the tedious steps of multiple transfers, reduces the risk of environmental microbial contamination, and better ensures the quality of the breast milk freeze-dried powder.

[0080] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model fall within the protection and disclosure scope of the present utility model.

Claims

1. A freeze-dried bag for collecting breast milk, characterized in that, The breast milk collection freeze-dried bag includes a bag body and a threaded bag head. The threaded bag head is provided on the top of the bag body and is used to screw on a breast pump. The top of the bag body is also provided with a sealing outlet, which is located near the threaded bag head and is used to cut and pour out materials; The bag body includes an inner bag and an outer bag extending from the inside out. The outer edge of the inner bag and the inner edge of the outer bag are fitted together. The inner bag is used to store materials.

2. The freeze-dried bag for collecting breast milk according to claim 1, characterized in that, The inner bag includes an upper film, a lower film, and a bottom film. The upper film, the bottom film, and the lower film are connected in sequence to form a cavity, which is used to store materials. One side of the upper membrane and one side of the lower membrane are heat-pressed together, and the other side of the upper membrane and the other side of the lower membrane are connected through the bottom membrane, which is used to support the upper and lower membranes to be placed vertically.

3. The freeze-dried bag for collecting breast milk according to claim 2, characterized in that, The upper membrane is an expanded polytetrafluoroethylene membrane; The lower film is a low-density polyethylene film, used to adhere to the freeze dryer's plates; The base film is a polyethylene terephthalate film.

4. The freeze-dried bag for collecting breast milk according to claim 2 or 3, characterized in that, The thickness of the upper film is 0.1 mm to 0.2 mm; The thickness of the lower membrane is 0.15mm to 0.25mm.

5. The freeze-dried bag for collecting breast milk according to claim 2, characterized in that, The outer bag includes an outer film and an outer bottom film. The outer film is attached to the upper film and the lower film, and the outer bottom film is attached to the bottom film.

6. The freeze-dried bag for collecting breast milk according to claim 5, characterized in that, The outer membrane is an antibacterial polyethylene terephthalate membrane; The outer bottom film is an antibacterial polyethylene terephthalate film.

7. The freeze-dried bag for collecting breast milk according to claim 1, characterized in that, The threaded bag head and the bag body are fixedly connected by heat pressing, and the interior of the threaded bag head is connected to the inner bag.

8. The freeze-dried bag for collecting breast milk according to claim 1, characterized in that, A threaded cap is screwed onto the side of the threaded bag head away from the bag body.

9. The freeze-dried bag for collecting breast milk according to claim 1, characterized in that, The width of the sealed outlet is smaller than the width of the inner bag.

10. The freeze-dried bag for collecting breast milk according to claim 1, characterized in that, The outer surface of the outer bag is provided with scale markings.

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