Composite breathable film
By designing a composite breathable membrane and utilizing staggered vents and an insulating cavity structure, the low efficiency and bag sagging issues caused by antistatic liquid coating in heat pack production were solved, achieving efficient production and uniform heating effect.
Patent Information
- Application Number
- CN202423305710.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-31
AI Technical Summary
In the current production of heat packs, the breathable layer needs to be coated with antistatic liquid, which leads to low production efficiency. Furthermore, when perforated film is combined with non-woven fabric, there are issues such as point heating and bag sagging.
The bag employs a first antistatic layer, an isolation layer, and a second antistatic layer, which are sequentially composited. The air vents are staggered, and the antistatic liquid coating is eliminated. An air diffusion cavity is formed through the isolation layer, ensuring that air enters evenly and creates negative pressure inside the bag.
Improve production efficiency, avoid point heating, prevent bag sagging, ensure heating effect and temperature uniformity, and reduce production costs.
Smart Images
Figure CN223590301U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the production and processing technical field of the warm paste, specifically relates to a composite breathable film. BACKGROUND
[0002] The warm paste is a self-heating product using the principle that iron powder reacts with air to generate heat, commonly known as "warm baby" or disposable heating warm paste. The warm paste comprises an outer packaging bag and an inner packaging bag, the outer packaging bag plays a role of air barrier, and the inner packaging bag contains a heating material. The inner packaging bag is composed of a breathable layer and a back glue, and the heating temperature and heating time of the warm paste are related to the heating material, and to a great extent, also depend on the air permeation of the breathable layer per unit time and per unit area.
[0003] In the production of the warm paste, the heating material is cut into a certain shape on the non-woven fabric, then the breathable layer is covered on the heating material, and the breathable layer and the non-woven fabric are heat-sealed on the circumferential outer side of the heating material to form the warm paste product. In the prior art, PE breathable film, non-woven fabric and punched film are used as the material of the breathable layer. After the preparation of the breathable layer, a layer of anti-static liquid needs to be coated to reduce or even avoid the generation of static electricity, so as to avoid the product quality problem caused by the escape of the heating material due to static electricity, that is, when the breathable layer and the back glue are heat-sealed, part of the heating material escapes due to the escape of the heating material, resulting in black spots at the heat-sealed position of the warm paste, forming defective products. Since the thickness of the anti-static liquid cannot be guaranteed to be uniform when it is coated, it is easy to cause waste and low production efficiency. Some production schemes use punched film and non-woven fabric to be compounded together, which has the disadvantage that the punching density is not enough, and the phenomenon of point heating occurs. In addition, due to the large punching aperture, the warm paste cannot generate negative pressure in the bag during use, and the heating material in the bag will drop after the bag is inflated, causing the bag to drop, affecting the heating effect and heating temperature. SUMMARY
[0004] The utility model discloses to solve the breathable film of existing warm paste needs to coat the anti-static liquid in the warm paste production process, causes the low production efficiency, if adopt the mode of composite together of punching film and non -woven fabric as the breathable layer use, can exist point heating phenomenon, and due to the punching aperture is too big, the warm paste can not produce the negative pressure in the bag in the use process, and the bag will lead to the falling of the heating material in the bag after drumming, cause the falling bag phenomenon, influence heating effect and heating temperature's problem, provide a kind of composite breathable film, by the first anti-static layer, isolation layer and second anti-static layer that sequentially composite together, utilize the first anti-static layer and second anti-static layer effectively reduce even prevent static generation, need not coat anti-static liquid, reduce production procedure, and make the air hole of first anti-static layer and second anti-static layer misregistration, effectively extend the journey and time of air into the warm paste contact heating material, and utilize the isolation layer to form air diffusion cavity, so that air evenly enters bag and contacts heating material, avoid point heating phenomenon, and ensure in the heating process, negative pressure is generated in the bag, effectively reduce even avoid the generation of falling bag phenomenon.
[0005] In order to realize the above-mentioned purpose, the technical scheme of the utility model is:
[0006] A kind of composite breathable film, including sequentially composite breathable layer and warm-keeping layer with good air permeability, the warm-keeping layer is printed with pattern;The breathable layer includes first anti-static layer, second anti-static layer and isolation layer with good air permeability, the isolation layer is located between first anti-static layer and second anti-static layer, a plurality of air holes are uniformly arranged on the first anti-static layer and second anti-static layer, and the air holes on the first anti-static layer and second anti-static layer are misregistration, which effectively extends the journey and time of air into the warm paste contact heating material through the air holes misregistration on the first anti-static layer and second anti-static layer.
[0007] Preferably, the warm-keeping layer includes a pattern printing layer and a deformation prevention layer, the pattern printing layer is printed with a pattern on the outside, and the deformation prevention layer is used to fix the pattern printing layer to prevent deformation of the pattern printing layer during heat transfer printing.
[0008] Preferably, the pattern printing layer is a layered structure made of spunlace fabric, and the deformation prevention layer is a layered structure made of PET mesh fabric.
[0009] Preferably, the first anti-static layer and the second anti-static layer are both layered structures made of anti-static film, which effectively ensures the anti-static performance.
[0010] Preferably, the isolation layer is a layered structure made of spunlace fabric, forming a chamber between the first anti-static layer and the second anti-static layer, so that air diffuses in the chamber and uniformly contacts the heating material.
[0011] Preferably, the first anti-static layer and the second anti-static layer are both adhesively combined with the isolation layer
[0012] Through the above technical scheme, the utility model has the beneficial effects that:
[0013] 1、The utility model discloses a first anti-static layer and second anti-static layer made of antistatic film material, which ensure the anti-static performance of the composite breathable film, eliminate the subsequent process of coating anti-static liquid and improve the production efficiency.
[0014] 2、The utility model discloses a first anti-static layer and second anti-static layer are misaligned with the air hole, which effectively prolongs the travel and time of air entering and contacting the heating material, ensures the negative pressure generated when the heating material heats up, and prolongs the heating time, thereby reducing or even avoiding the bag falling phenomenon by using negative pressure.
[0015] 3、The utility model discloses a first anti-static layer and second anti-static layer are misaligned with the air hole, which effectively prolongs the travel and time of air entering and contacting the heating material, ensures the negative pressure generated when the heating material heats up, and prolongs the heating time, thereby reducing or even avoiding the bag falling phenomenon by using negative pressure.
[0016] 4、The utility model discloses a first anti-static layer and second anti-static layer are misaligned with the air hole, which effectively prolongs the travel and time of air entering and contacting the heating material, ensures the negative pressure generated when the heating material heats up, and prolongs the heating time, thereby reducing or even avoiding the bag falling phenomenon by using negative pressure. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 The utility model discloses a first anti-static layer and second anti-static layer are misaligned with the air hole, which effectively prolongs the travel and time of air entering and contacting the heating material, ensures the negative pressure generated when the heating material heats up, and prolongs the heating time, thereby reducing or even avoiding the bag falling phenomenon by using negative pressure.
[0018] The utility model discloses a first anti-static layer and second anti-static layer are misaligned with the air hole, which effectively prolongs the travel and time of air entering and contacting the heating material, ensures the negative pressure generated when the heating material heats up, and prolongs the heating time, thereby reducing or even avoiding the bag falling phenomenon by using negative pressure. DETAILED DESCRIPTION
[0019] The utility model discloses a first anti-static layer and second anti-static layer are misaligned with the air hole, which effectively prolongs the travel and time of air entering and contacting the heating material, ensures the negative pressure generated when the heating material heats up, and prolongs the heating time, thereby reducing or even avoiding the bag falling phenomenon by using negative pressure.
[0020] As Figure 1As shown, the embodiment provides a composite breathable film, which comprises a breathable layer and a warm-keeping layer with good breathability, which are sequentially compounded, the warm-keeping layer is printed with a pattern, the warm-keeping layer comprises a pattern printing layer 5 and a deformation prevention layer 6, the pattern printing layer 5 is printed with a pattern on the outside, the pattern printing layer 5 is a layered structure made of spunlace fabric, which has soft hand feeling, the printed pattern has gloss and excellent appearance, the deformation prevention layer 6 is a layered structure made of PET mesh cloth, the printed pattern on the surface of the pattern printing layer 5 is printed by hot transfer, the temperature is above 200℃, the spunlace fabric material is prone to shrinkage and deformation under heat, which affects the consistency of the printed pattern, therefore, before printing, a deformation prevention layer 6 made of PET mesh cloth material is first compounded on one side of the pattern printing layer 5, the pattern printing layer 5 is fixed by the deformation prevention layer 6 during the hot transfer process to prevent shrinkage and deformation, thereby ensuring good consistency of the printed pattern.
[0021] The breathable layer comprises a first anti-static layer 1, a second anti-static layer 3 and an isolation layer 2 with good breathability, the isolation layer 2 is located between the first anti-static layer 1 and the second anti-static layer 3, a plurality of breathable holes 4 are arranged on the first anti-static layer 1 and the second anti-static layer 3, when the warm-keeping pad is used, the external air passes through the warm-keeping layer, reaches the isolation layer 2 position through the breathable holes 4 on the first anti-static layer 1, the isolation layer 2 is a layered structure made of spunlace fabric, the isolation layer 2 forms a cavity between the first anti-static layer 1 and the second anti-static layer 3, the air entering the cavity is uniformly diffused therein, and then uniformly contacts the heating material through the plurality of breathable holes 4 on the second anti-static layer 3, which effectively improves the uniformity of the breathable layer, ensures uniform heating of the warm-keeping pad, and the breathable holes 4 on the first anti-static layer 1 and the second anti-static layer 3 are arranged in a staggered manner, thereby effectively prolonging the travel and time of the air entering the bag to contact the heating material, prolonging the heating duration of the heating material, and ensuring that the cavity in the bag generates negative pressure when the heating material generates heat, thereby effectively avoiding the occurrence of the bag falling phenomenon.
[0022] The first anti-static layer 1 and the second anti-static layer 2 are both layered structures made of anti-static film.
[0023] In the production of the warm-keeping pad, in order to ensure the yield of the production of the warm-keeping pad, a layer of anti-static liquid needs to be coated on the breathable layer to reduce or even avoid the generation of static electricity, however, the coating of the anti-static liquid on one hand prolongs the production process, affecting the production efficiency, and on the other hand, the coating method of the anti-static liquid is difficult to control the coating thickness, thereby easily causing uneven coating thickness of the anti-static liquid, causing waste, the present scheme uses an anti-static film material to support the first anti-static layer 1 and the second anti-static layer 3, and physically punches holes thereon, so that the anti-static liquid coating process is not needed, thereby effectively improving the production efficiency of the warm-keeping pad.
[0024] The first anti-static layer 1 and the second anti-static layer 3 are adhesively combined with the isolation layer 2, and the point bonding can be used for the connection mode, and meanwhile, the excess adhesive is absorbed by the isolation layer 2 when the first anti-static layer 1 or the second anti-static layer 3 is combined, so that the air vent 4 is prevented from being blocked.
[0025] The utility model discloses through canceling PE air permeable film layer, using second anti-static layer 3, simultaneously using the air vent 4 of second anti-static layer 3 and first anti-static layer 1 upper dislocation setting, reach compared with original PE air permeable film better air permeability and make the effect of heating material heating, compared with the prior art PE air permeable film, effectively reduce production cost.
[0026] The utility model discloses through setting the warm layer in the outer layer, namely the pattern printing layer 5 and the deformation prevention layer 6 that are compounded together, on one hand guarantee the consistency of the pattern printing of pattern printing layer 5 outside, guarantee the appearance effect of product, and the warm layer is used to keep warm to the temperature of the warm patch, reduces the heat loss, prolongs the heating time.
[0027] Meanwhile, the first anti-static layer 1, the isolation layer 2 and the second anti-static layer 3 are sequentially compounded, and the air vent 4 is arranged on the first anti-static layer 1 and the second anti-static layer 3, so that on one hand, the isolation layer 2 ensures the uniform dispersion of air entering the bag and contacting the heating material, and on the other hand, the air vent 4 is arranged in a staggered manner to prolong the travel distance and time of air entering the bag and contacting the heating material, so as to ensure the formation of negative pressure in the bag, effectively reduce or prevent the bag from falling, ensure the heating temperature and effect, and the first anti-static layer 1 and the second anti-static layer 3 supported by the anti-static film can effectively reduce or avoid the generation of static electricity, ensure the production yield of the warm patch, save the process of coating the anti-static liquid, improve the production efficiency of the warm patch, and cancel the use of the original PE air permeable film, effectively reduce the production cost.
[0028] The above-mentioned embodiments are only preferred embodiments of the utility model, and do not limit the implementation range of the utility model, so that equivalent changes or modifications made according to the structure, features and principles described in the utility model patent range should be included in the utility model application patent range.
Claims
1. A composite breathable film, characterized by, The warm-keeping layer with good air permeability is printed with a pattern. The air-permeable layer comprises a first anti-static layer (1), a second anti-static layer (3) and an isolation layer (2) with good air permeability, the isolation layer (2) is located between the first anti-static layer (1) and the second anti-static layer (3), a plurality of air-permeable holes (4) are uniformly arranged on the first anti-static layer (1) and the second anti-static layer (3), and the air-permeable holes (4) on the first anti-static layer (1) and the second anti-static layer (3) are arranged in a staggered manner.
2. The composite breathable film according to claim 1, wherein The warm-keeping layer comprises a pattern-printed layer (5) and a deformation-preventing layer (6) which are compounded, and a pattern is printed on the outer side of the pattern-printed layer (5).
3. The composite breathable film according to claim 2, wherein The pattern-printed layer (5) is a layered structure made of spunlace fabric, and the deformation-preventing layer (6) is a layered structure made of PET mesh fabric.
4. The composite breathable film according to claim 1, wherein The first anti-static layer (1) and the second anti-static layer (3) are both layered structures made of anti-static film.
5. The composite breathable film of claim 1, wherein The isolation layer (2) is a layered structure made of spunlace fabric.
6. The composite breathable film of claim 1, wherein The first anti-static layer (1) and the isolation layer (2) and the second anti-static layer (3) and the isolation layer (2) are both adhesively compounded.