One-step formed raw material-free bonding hot-water bag and preparation process thereof

Abstract

The invention discloses a one-time formed raw material-free bonding hot-water bag and a preparation process thereof, relates to the field of hot-water bag manufacturing, and aims to solve the problem that the overall strength is influenced as the bag body bonding strength at the inlet and outlet seam of a mold core is far insufficient at the one-time formed part of the bag body. According to the technical scheme, the hot-water bag is characterized in that an enlarged bag opening is formed in one end of a one-time formed bag body, a mold core is pulled out of the bag opening, materials are saved, meanwhile, the strength of all parts of the hot-water bag is effectively optimized, and the overall structural strength of the hot-water bag is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hot water bag manufacturing, and specifically to a one - time - forming raw - material - free bonded hot water bag and its preparation process. Background Art

[0002] Hot water bags are often used for hot compress care of patients. Heat can stimulate tissue regeneration, relieve pain and enhance tissue nutrition. When heat acts on the wound on the body surface, a large amount of serous exudate increases, which can assist in removing pathological products. Heat can dilate blood vessels, enhance vascular permeability, facilitate the discharge of tissue metabolites and the absorption of nutrients, inhibit the development of inflammation and promote its healing. Different hot compress methods use different hot compress tools, and a water hot compress therapy requires a hot water bag.

[0003] Traditional hot water bags are just empty bags made of rubber, usually square, with a hot water inlet and outlet at one end, sealed with a plug, mostly a spiral plug. Its usage method is to fill it with hot water to play a role in warming.

[0004] An existing processing and forming method of a hot water bag is to reserve a core access slit at the bag tail. After one - time hot - pressing the edge into shape, the core is drawn out from the core access slit, and then the core access slit is secondarily hot - pressed and sealed to complete the final welding.

[0005] The above - mentioned existing technical solutions have the following defects. After one - time hot - pressing and forming, the raw material at the core access slit has been cooked. Therefore, additional raw material needs to be added for secondary hot - pressing. On the one hand, this results in a larger thickness at the core access slit and more material consumption. On the other hand, the bag body has been cooked by one - time hot - pressing. Even if additional raw material is added, the bonding strength of the bag body at the core access slit is far less than that of the one - time - formed part of the bag body. Therefore, the above process needs to be further improved to reduce the amount of rubber material used while increasing the bonding strength of the bag body. Summary of the Invention

[0006] The purpose of the present invention is to provide a one - time - forming raw - material - free bonded hot water bag and its preparation process.

[0007] To achieve the above - mentioned purpose, the present invention provides the following technical solutions:

[0008] It includes a one - time - formed bag body. One end of the one - time - formed bag body is provided with an enlarged bag mouth. A rapid - forming component is filled in the bag mouth. The outer edge of the rapid - forming component is attached to the inner wall of the bag mouth. A number of mutually parallel locking grooves are arranged around the outer edge of the rapid - forming component. A filling hole communicating with the locking grooves is opened on the outer wall of the rapid - forming component. Rubber material is filled in the filling hole, and the rubber material covers the surface of the rapid - forming component.

[0009] By adopting the above technical solution, the one-piece formed bag body, due to the one-piece forming process, compared with the previous method of reserving a die core access slit at the bag tail, the die core is withdrawn from the bag mouth. The edge of the one-piece formed bag body is more integrated as there is no die core access slit, and there is no need to add raw material for sealing here. While the overall strength is higher, the material consumption is also more saved. Correspondingly, there is no need to reserve an extra thickened sealing edge at the edge of the one-piece formed bag body, and the edge is thinner and lighter. When in use, it fits the human body for hot compress more closely. Although the bag mouth is enlarged, the rapid prototyping component can be enlarged synchronously at the same time. The increase in the amount of rubber material used at the bag mouth is much smaller than the amount of rubber material saved in the one-piece formed bag body. Overall, the rubber material saving is obvious.

[0010] The setting of the filling hole facilitates the filling of rubber material. After the rubber material is cured, several locks are formed with the bag mouth through the locking groove. At the same time, the rubber material covering the surface of the rapid prototyping component, after being cured, can isolate the rapid prototyping component on the one hand and lock the rapid prototyping component as the last insurance on the other hand, having a good multi-layer fixing effect. Although the bonding strength of the secondary feeding and curing is not as strong as that of the one-piece forming and curing, the bonding area between the rubber material at the bag mouth and the bag mouth is larger, and the overall strength will not be weaker than that of the one-piece formed bag body. The lower limit strength of each part of the hot water bag is greatly improved, and the overall strength of the hot water bag is greatly enhanced.

[0011] In summary, while saving materials, the strength of each part of the hot water bag is effectively optimized, the overall structural strength of the hot water bag is greatly improved, and the one-piece formed bag body fits the human body in all directions, with a better hot compress effect.

[0012] Furthermore, the rapid prototyping component is provided with an enlarged connecting water port running through it, and a sealing plug is threadedly connected to the water port.

[0013] By adopting the above technical solution, the connecting water port connects the inside and outside of the one-piece formed bag body, facilitating the filling of hot water. The setting of the sealing plug facilitates the sealing and unsealing of the connecting water port. At the same time, since the rapid prototyping component can be enlarged along with the bag mouth, the connecting water port can be enlarged along with the rapid prototyping component. After the bag mouth and the rapid prototyping component are enlarged, the contact area with the user's palm is increased, making it more convenient to hold. The enlarged connecting water port can further increase the hot water flow rate filled per unit time and facilitate the discharge of the gas inside the one-piece formed bag body, avoiding the internal gas exploding and discharging in the form of bubbles when the hot water is filled completely filling the connecting water port, and it is also safer and more convenient to use.

[0014] Furthermore, a hanging part is fixedly arranged at one end of the one-piece formed bag body far away from the bag mouth, and a hanging hole is formed through the hanging part.

[0015] By adopting the above technical solution, the hanging part combined with the hanging hole facilitates the temporary hanging and placing of the one-piece formed bag body, which is convenient for use.

[0016] Furthermore, a one-step forming process for preparing a hot water bag without raw material bonding includes the following preparation processes:

[0017] S1. Preparation stage: Cut out a whole piece of solid rubber material and fold it for placement.

[0018] S2. Mold fixation: Fix the upper mold shell and the lower mold shell on the upper and lower trays of the molding press respectively, and then fix and install the mold core on the lower mold shell.

[0019] S3. Set temperature parameters: Operate the control interface of the molding press to adjust the temperatures of the upper mold shell and the lower mold shell to 160 - 180 °C.

[0020] S4. First mold closing: Start the molding press and use it to close the lower mold shell, the mold core, and the upper mold shell.

[0021] S5. First mold opening: Control the molding press to open the mold, draw out the mold core from the bag mouth, and tear the corner scraps by hand.

[0022] S6. Add rubber material: After the mold core is drawn out, place the rapid prototyping component at the bag mouth and press the edge tightly, and add sufficient rubber material into the filling hole until the rubber material fills the locking groove and covers the outer surface of the rapid prototyping component.

[0023] S7. Second mold closing: The molding press hot presses and closes the rubber material, the mold closing temperature is 170 - 190 °C, and then the air compressor inflates the semi-finished product in the mold to check for air leakage.

[0024] S8. Second mold opening: Open the mold again, take out the finished product, tear the corner scraps by hand, and screw on the sealing plug to complete the forming of the finished product.

[0025] 5. The one-step forming process for preparing a hot water bag without raw material bonding according to claim 4, characterized in that: the first mold closing and forming time is 60 - 80 seconds, the second mold closing and forming time is 50 - 60 seconds, and the inflation time is 100 - 200 seconds.

[0026] The rubber material formula is as follows by weight components:

[0027] Its raw materials by weight include: 41-43 parts of ethylene propylene diene monomer rubber, 12-14 parts of hydrogenated nitrile rubber, 2.2-2.8 parts of urethane vulcanizing agent, 1.3-1.7 parts of sulfur, 2.5-3.5 parts of accelerator TMTD, 22-27 parts of white carbon black, 9.5-10.5 parts of cashew shell oil, 5.5-6.5 parts of boron powder, 14.2-14.8 parts of fly ash microspheres, 14.2-14.8 parts of calcined clay, 10.5-11.5 parts of zinc oxide, 3.5-4.5 parts of quartz powder, 5.5-6.5 parts of antioxidant MB, 2.5-3.5 parts of light calcium carbonate, 6-7.5 parts of barium stearate, 5.5-6.5 parts of palm wax, 2.5-3.5 parts of zinc diethyldithiocarbamate, and 1.8-2.2 parts of dicumyl peroxide.

[0028] In summary, the beneficial technical effects of the present invention are as follows:

[0029] 1. By adopting an enlarged bag mouth, it is convenient to draw out the mold core from the bag mouth, thus saving materials while effectively optimizing the strength of each part of the hot water bag and greatly improving the overall structural strength of the hot water bag;

[0030] 2. By adopting an enlarged connecting water inlet, it can increase the hot water flow rate injected per unit time, and at the same time avoid the internal gas from exploding and discharging in the form of bubbles when the hot water is filled completely, making it safer and more convenient to use; BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification, but do not limit the present invention. In the drawings:

[0032] Figure 1 is a schematic structural diagram of a hot water bag with a mold core access slit reserved at the bag tail;

[0033] Figure 2 is a schematic diagram of the overall structure of the present invention;

[0034] Figure 3 is an exploded schematic diagram of the overall structure of the present invention

[0035] Figure 4 is Figure 3 an enlarged schematic diagram of the structure of part A in

[0036] In the figures, 1 is a one-piece formed bag body; 11 is the bag mouth; 2 is a rapid prototyping component; 21 is a locking groove; 22 is a filling hole; 23 is a connecting water inlet; 3 is rubber material; 4 is a sealing plug; 5 is a hanging part; 51 is a hanging hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The following further details the present invention with reference to the drawings.

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] Please refer to Figures 2 - 4 , the present invention provides a technical solution:

[0040] It includes a one-piece formed bag body 1. One end of the one-piece formed bag body 1 is provided with an enlarged bag mouth 11. A rapid forming member 2 is filled in the bag mouth 11. The outer edge of the rapid forming member 2 is attached to the inner wall of the bag mouth 11. A plurality of mutually parallel locking grooves 21 are arranged around the outer edge of the rapid forming member 2. A filling hole 22 communicating with the locking grooves 21 is opened on the outer wall of the rapid forming member 2. A rubber material 3 is filled in the filling hole 22, and the rubber material 3 covers the surface of the rapid forming member 2.

[0041] Since the one-piece formed bag body 1 adopts a one-piece forming process, compared with the previous method of leaving a mold core access slit at the bag tail, the mold core is drawn out from the bag mouth 11. The edge of the one-piece formed bag body 1 is more integrated because there is no mold core access slit, and there is no need to add raw materials for sealing. While the overall strength is higher, the material is more saved. Correspondingly, there is no need to reserve an extra thickened sealing edge at the edge of the one-piece formed bag body 1, and the edge is thinner and lighter. When in use, the edge fits the human body for hot compress more closely. Although the bag mouth 11 is enlarged, the rapid forming member 2 can be enlarged synchronously at the same time. The increased amount of the rubber material 3 at the bag mouth 11 is much smaller than the saved amount of the rubber material 3 of the one-piece formed bag body 1. Generally, the rubber material 3 is saved significantly.

[0042] The setting of the filling hole 22 facilitates the filling of the rubber material 3. After the rubber material 3 is cured, a plurality of locks are formed with the bag mouth 11 through the locking grooves 21. At the same time, after the rubber material 3 covering the surface of the rapid forming member 2 is cured, on the one hand, it can isolate the rapid forming member 2, and on the other hand, it serves as the last insurance to lock the rapid forming member 2, having a good multi-layer fixing effect. Although the bonding strength of the secondary feeding and curing is not as strong as that of the one-piece forming and curing, the bonding area of the rubber material 3 at the bag mouth 11 with the bag mouth 11 is larger, and the overall strength will not be weaker than that of the one-piece formed bag body 1. The lower limit strength of each part of the hot water bag is greatly improved, and the overall strength of the hot water bag is greatly enhanced.

[0043] In summary, while saving materials, the strength of each part of the hot water bag is effectively optimized, the overall structural strength of the hot water bag is greatly improved, and the one-piece formed bag body 1 fits the human body in all directions, and the hot compress effect is better.

[0044] The rapid prototyping component 2 is provided with enlarged communicating water inlets 23 running through it, and a sealing plug 4 is threadedly connected to the water inlets.

[0045] The communicating water inlets 23 communicate the inside and outside of the one-piece formed bag body 1, facilitating the filling of hot water. The setting of the sealing plug 4 facilitates the sealing and unsealing of the communicating water inlets 23. At the same time, since the rapid prototyping component 2 can be enlarged along with the bag mouth 11, the communicating water inlets 23 can be enlarged along with the rapid prototyping component 2. After the bag mouth 11 and the rapid prototyping component 2 are enlarged, the contact area with the user's palm is increased, making it more convenient to hold. The enlarged communicating water inlets 23 can further increase the hot water flow rate filled per unit time and facilitate the discharge of the gas inside the one-piece formed bag body 1, avoiding the internal gas from bursting and discharging in the form of bubbles when the hot water is filled, and making it safer and more convenient to use.

[0046] A hook part 5 is fixedly arranged at one end of the one-piece formed bag body 1 far from the bag mouth 11, and a hook hole 51 is formed through the hook part 5.

[0047] The combination of the hook part 5 and the hook hole 51 facilitates the temporary hanging and placement of the one-piece formed bag body 1, making it convenient to use.

[0048] Example 1:

[0049] S1. Preparation stage; Cut out a whole piece of solid rubber material 3 and fold it for placement;

[0050] S2. Mold fixation; Fix the upper mold shell and the lower mold shell on the upper and lower trays of the molding press respectively, and then fix the mold core on the lower mold shell;

[0051] S3. Set temperature parameters; Operate the control interface of the molding press to adjust the temperatures of the upper mold shell and the lower mold shell to 160°C;

[0052] S4. First mold closing: Start the molding press and use the molding press to close the lower mold shell, the mold core, and the upper mold shell;

[0053] S5. First mold opening: Control the molding press to open the mold, and draw out the mold core from the bag mouth 11, and tear the corner scraps by hand;

[0054] S6. Add rubber material: After the mold core is drawn out, place the rapid prototyping component 2 at the bag mouth 11 and press the edge tightly, and add a sufficient amount of rubber material 3 into the filling hole 22 until the rubber material 3 fills the locking groove 21 and covers the outer surface of the rapid prototyping component 2;

[0055] S7. Second mold closing: The molding press hot-presses and closes the rubber material 3, the mold closing temperature is 170°C, and then the air compressor inflates the semi-finished product in the mold to check for air leakage;

[0056] S8. Second mold splitting: Split the mold again, take out the finished product, tear off the corner waste by hand, screw on the sealing plug 4, and the finished product is formed.

[0057] 5. A preparation process for a one - time - formed raw - material - free bonded hot - water bag according to claim 4, characterized in that: the first mold - closing forming time is 60 seconds, the second mold - closing forming time is 50 seconds, and the inflation time is 100 seconds.

[0058] The rubber material 3 formula is as follows by weight components:

[0059] Its raw materials by weight include: 41 parts of ethylene - propylene - diene monomer rubber, 12 parts of hydrogenated nitrile - butadiene rubber, 2.2 parts of urethane vulcanizing agent, 1.3 parts of sulfur, 2.5 parts of accelerator TMTD, 22 parts of white carbon black, 9.5 parts of cashew shell oil, 5.5 parts of boron powder, 14.2 parts of fly ash microspheres, 14.2 parts of calcined clay, 10.5 parts of zinc oxide, 3.5 parts of quartz powder, 5.5 parts of antioxidant MB, 2.5 parts of light calcium carbonate, 6 parts of barium stearate, 5.5 parts of palm wax, 2.5 parts of zinc diethyldithiocarbamate, 1.8 parts of dicumyl peroxide.

[0060] Example 2

[0061] A preparation process for a one - time - formed raw - material - free bonded hot - water bag includes the following preparation processes:

[0062] S1. Preparation stage; Cut out a whole piece of solid rubber material and fold it for placement;

[0063] S2. Mold fixing; Fix the upper mold shell and the lower mold shell on the upper and lower trays of the molding press respectively, and then fix the mold core on the lower mold shell;

[0064] S3. Set temperature parameters; Operate the control interface of the molding press to adjust the temperatures of the upper mold shell and the lower mold shell to 180 °C;

[0065] S4. First mold closing: Start the molding press and use the molding press to close the lower mold shell, the mold core, and the upper mold shell;

[0066] S5. First mold splitting: Control the molding press to split the mold and draw out the mold core from the bag mouth, and tear off the corner waste by hand;

[0067] S6. Add rubber material: After the mold core is drawn out, place the rapid - forming component at the bag mouth and press the edge tightly, add sufficient rubber material into the filling hole until the rubber material fills the locking groove and covers the outer surface of the rapid - forming component;

[0068] S7. Second mold closing: Use the molding press to hot - press and close the rubber material, the mold - closing temperature is 190 °C, and then use an air compressor to inflate the semi - finished product in the mold and check for air leakage;

[0069] S8, Second mold splitting: Split the mold again, take out the finished product, tear off the leftover material at the corners by hand, screw on the sealing plug, and the finished product is formed.

[0070] 5. A preparation process for a one - time - formed raw - material - free adhesive hot water bag according to claim 4, characterized in that: the first mold - closing forming time is 80 seconds, the second mold - closing forming time is 60 seconds, and the inflation time is 200 seconds.

[0071] The rubber material formula is as follows by weight components:

[0072] Its raw materials include by weight: 43 parts of ethylene - propylene - diene monomer rubber, 14 parts of hydrogenated nitrile - butadiene rubber, 2.8 parts of urethane vulcanizing agent, 1.7 parts of sulfur, 3.5 parts of accelerator TMTD, 27 parts of white carbon black, 10.5 parts of cashew shell oil, 6.5 parts of boron powder, 14.8 parts of fly ash microspheres, 14.8 parts of calcined clay, 11.5 parts of zinc oxide, 4.5 parts of quartz powder, 6.5 parts of antioxidant MB, 3.5 parts of light calcium carbonate, 7.5 parts of barium stearate, 6.5 parts of palm wax, 3.5 parts of zinc diethyldithiocarbamate, 2.2 parts of dicumyl peroxide.

[0073] Comparative example:

[0074] S1. Preparation stage; Cut out a whole piece of rubber material and fold it for placement;

[0075] S2. Mold fixation; Fix the upper mold shell and the lower mold shell on the upper and lower trays of the molding press respectively, and then fix the mold core on the lower mold shell;

[0076] S3. Set temperature parameters; Operate the control interface of the molding press to adjust the temperatures of the upper mold shell and the lower mold shell to 180 °C;

[0077] S4. First mold closing: Start the molding press, and use the molding press to close the lower mold shell, the mold core, and the upper mold shell, with a forming time of 80 seconds;

[0078] S5. First mold splitting: Control the molding press to split the mold, and draw out the mold core from the mold core access slit at the tail of the bag body, and tear off the leftover material at the corners by hand;

[0079] S6. Add rubber material: After the mold core is drawn out, add raw rubber material at the mold core access slit;

[0080] S7. Second mold closing and inflation: Use the molding press to hot - press and close the raw rubber material, with a mold - closing temperature of 190 °C and a forming time of 60 seconds. Then, use an air compressor to inflate the semi - finished product in the mold to check for air leakage, with an inflation time of 200 seconds;

[0081] S8. Second mold splitting: Split the mold again, take out the finished product, tear off the leftover material at the corners by hand, and the finished product is formed.

[0082] The rubber compound formula is as follows by weight components:

[0083] Its raw materials by weight include: 75 parts of ethylene propylene diene monomer rubber, 35 parts of hydrogenated nitrile butadiene rubber, 2.8 parts of urethane curing agent, 1.7 parts of sulfur, 3.5 parts of accelerator TMTD, 27 parts of white carbon black, 10.5 parts of cashew shell oil, 6.5 parts of boron powder, 14.8 parts of fly ash microspheres, 14.8 parts of calcined clay, 11.5 parts of zinc oxide, 4.5 parts of quartz powder, 6.5 parts of antioxidant MB, 3.5 parts of light calcium carbonate, 7.5 parts of barium stearate, 6.5 parts of palm wax, 3.5 parts of zinc diethyldithiocarbamate, and 2.2 parts of dicumyl peroxide.

[0084]

[0085]

[0086] It can be clearly seen from the above table that the overall strength of the one - time - formed bag body in Examples 1 and 2 is higher than that of the bag body in the comparative example, and the strength of the bag mouth is far higher than that of all bag bodies. Therefore, while the overall compressive degree of the one - time - formed bag body is higher, the usage amount of the rubber compound is also much lower than that of the comparative example. In Example 1, due to less material used, the thickness after forming is not as good as that in Example 2, so the strength is relatively inferior to that in Example 2, but the overall strength is still higher than that of the comparative example.

[0087] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to this process, method, article or device.

[0088] Finally, it should be noted that: The above - mentioned are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A one - time - formed raw - material - free adhesive hot - water bag, comprising a one - time - formed bag body (1), characterized in that: One end of the one-piece formed bag body (1) is provided with an enlarged bag opening (11). A rapid prototyping member (2) is filled in the bag opening (11). The outer edge of the rapid prototyping member (2) is attached to the inner wall of the bag opening (11). A plurality of mutually parallel locking grooves (21) are arranged around the outer edge of the rapid prototyping member (2). A filling hole (22) communicating with the locking grooves (21) is opened on the outer wall of the rapid prototyping member (2). A rubber material (3) is filled in the filling hole (22), and the rubber material (3) covers the surface of the rapid prototyping member (2).

2. The one-piece seamless bonding hot water bag according to claim 1, wherein: An enlarged communicating water inlet (23) is provided through the rapid prototyping member (2), and a sealing plug (4) is threadedly connected to the water inlet.

3. The one-piece non-raw material bonded hot water bag according to claim 1, wherein: One end of the one-piece formed bag body (1) away from the bag opening (11) is fixedly provided with a hanging part (5), and a hanging hole (51) is provided through the hanging part (5).

4. A one-step forming raw material-free adhesive hot water preparation process according to claims 1-3, characterized in that, It includes the following preparation process: S1. Preparation stage; Cut out a whole piece of solid rubber material (3) and fold it for placement; S2. Mold fixing; Fix the upper mold shell and the lower mold shell on the upper and lower trays of the molding press respectively, and then fix the mold core on the lower mold shell; S3. Set temperature parameters; Operate the control interface of the molding press to adjust the temperatures of the upper mold shell and the lower mold shell to 160 - 180 °C; S4. First mold closing: Start the molding press and use the molding press to close the lower mold shell, the mold core, and the upper mold shell; S5. First mold opening: Control the molding press to open the mold, draw out the mold core from the bag opening (11), and tear off the corner waste by hand; S6. Add rubber material: After the mold core is drawn out, place the rapid prototyping member (2) at the bag opening (11) and press the edge tightly. Add sufficient rubber material (3) into the filling hole (22) until the rubber material (3) fills the locking grooves (21) and covers the outer surface of the rapid prototyping member (2); S7. Second mold closing: Use the molding press to hot-press and close the rubber material (3). The mold closing temperature is 170 - 190 °C. Then, use an air compressor to inflate the semi-finished product in the mold to check for air leakage; S8. Second mold opening: Open the mold again, take out the finished product, tear off the corner waste by hand, screw on the sealing plug (4), and the finished product is formed.

5. A one-step forming raw material-free adhesive hot water bag preparation process according to claim 4, characterized in that: The first mold closing and forming time is 60 - 80 seconds, the second mold closing and forming time is 50 - 60 seconds, and the inflation time is 100 - 200 seconds.

6. A one - time - formed raw - material - free adhesive hot water bag and its preparation process according to claims 1 - 5, characterized in that, The formula of the rubber material (3) is as follows by weight components: Its raw materials by weight include: 41-43 parts of ethylene propylene diene monomer rubber, 12-14 parts of hydrogenated nitrile butadiene rubber, 2.2-2.8 parts of urethane curing agent, 1.3-1.7 parts of sulfur, 2.5-3.5 parts of accelerator TMTD, 22-27 parts of white carbon black, 9.5-10.5 parts of cashew shell oil, 5.5-6.5 parts of boron powder, 14.2-14.8 parts of fly ash cenospheres, 14.2-14.8 parts of calcined clay, 10.5-11.5 parts of zinc oxide, 3.5-4.5 parts of quartz powder, 5.5-6.5 parts of antioxidant MB, 2.5-3.5 parts of light calcium carbonate, 6-7.5 parts of barium stearate, 5.5-6.5 parts of palm wax, 2.5-3.5 parts of zinc diethyldithiocarbamate, 1.8-2.2 parts of dicumyl peroxide.

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