Waterproof breathable film compounded with non-woven fabric

Abstract

The waterproof breathable film comprises a waterproof breathable film main body and a release film layer bonded on the surface of the waterproof breathable film main body, and the waterproof breathable film main body comprises a bonding layer, a composite functional layer, a reinforced fiber layer and a bottom film layer which are sequentially arranged from top to bottom. A base film layer is clamped between the composite functional layer and the reinforcing fiber layer, an anti-static layer is clamped between the reinforcing fiber layer and the base film layer, and a plurality of air holes penetrating in the thickness direction of the waterproof breathable film body are formed in the waterproof breathable film body. According to the utility model, the waterproof breathable film main body has harmful substance adsorption and antibacterial properties through the composite functional layer, the reinforcing fiber layer can enhance the structural strength of the waterproof breathable film main body, and the antistatic layer has an antistatic effect, so that the problem of static electricity generated by friction in the use process of the waterproof breathable film main body is effectively prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to composite film technical field especially with non -woven fabric composite waterproof and breathable film. BACKGROUND

[0002] Waterproof and breathable film is a new type of high polymer waterproof and breathable raw material, also known as super micro porous structure material, which makes small water molecules unable to pass through the micro pores of the material, and can be highly breathable while achieving waterproof effect, achieving the effects of heat dissipation, internal and external pressure regulation, after the waterproof and breathable film is compounded with non -woven fabric, the advantages of the two materials are combined, and the composite material has the characteristics of high strength, wear resistance, water resistance, air permeability and chemical corrosion resistance, which can keep waterproof while allowing air circulation, and help prevent mold or bacterial growth inside the product.

[0003] Based on the above situation, in the prior art, the patent number CN202021136032.1 discloses a kind of waterproof and breathable film for composite non -woven fabric, including protective film and non -woven fabric, protective film is composed of nano film and PE film, nano film, PE film and non -woven fabric are sequentially arranged from top to bottom, a plurality of through holes are provided in non -woven fabric, and each through hole is filled with water absorbing particles, air holes are provided on water absorbing particles, and a water absorbing layer is further provided on the surface of the top of non -woven fabric, the water absorbing layer and water absorbing particles in the above waterproof and breathable film have certain water absorption capacity, the water absorbing particles are sponge particles, which will swell and block the through hole after absorbing water, to achieve waterproof, and air holes are used to realize air permeability, the water absorption of water absorbing layer is used to realize waterproof with water absorbing particles, and PE film and nano film have the characteristics of waterproof and air permeability, so as to ensure the waterproof and air permeability of the whole protective film.

[0004] Although the above waterproof and breathable film performs well in waterproof and breathable, it has certain deficiencies in structural strength, due to the physical properties of non -woven fabric, nano film and PE film, the whole film is easy to be damaged when subjected to external force, such as pulling, tearing and the like, at the same time, the above waterproof and breathable film lacks corresponding anti -static performance in structure, in actual application, static electricity is easy to be generated after film is rubbed, which causes adhesion between films or between film and other materials, which will affect the use effect of film. UTILITY MODEL CONTENTS

[0005] In view of the technical defects in the background art, the utility model provides a kind of waterproof and breathable film for composite non -woven fabric, in order to further solve the above technical problems and meet the actual demand, the specific technical scheme is as follows:

[0006] The application discloses a waterproof and breathable film for non-woven fabric compounding, which comprises a waterproof and breathable film body and a release film layer adhered to the surface of the waterproof and breathable film body.

[0007] Further, the composite functional layer comprises adsorption layers and antibacterial agent particle layers which are alternately arranged on the upper surface of the base film layer.

[0008] Further, the adsorption layer is an activated carbon layer with a thickness of 50-100 mu m, and the antibacterial agent particle layer is a nano-silver particle antibacterial layer with a thickness of 50-100 mu m.

[0009] Further, the base film layer is an e-PTFE film layer with a thickness of 150-200 mu m.

[0010] Further, the release film layer is an antistatic release film with a thickness of 50-100 mu m, and the release film layer is composed of an antistatic coating, a PET film and a release coating which are sequentially compounded from top to bottom.

[0011] Further, the reinforcing fiber layer is woven by bamboo fibers with a diameter of 100-150 mu m in a plain weave manner.

[0012] Further, the air holes sequentially penetrate the adhesive layer, the composite functional layer, the base film layer, the reinforcing fiber layer and the bottom film layer along the thickness direction of the waterproof and breathable film body, the upper end of the air hole is arranged on the upper surface of the adhesive layer, the lower end of the air hole is arranged on the lower surface of the bottom film layer, and the pore size of the air hole is 20-50 mu m.

[0013] Further, the bottom film layer is a TPU waterproof and breathable film layer with a thickness of 150-200 mu m, and the antistatic layer is coated by an antistatic liquid containing conductive particles.

[0014] Further, the adhesive layer is a pressure-sensitive adhesive coating with a thickness of 40-50 mu m.

[0015] The application has the beneficial effects that:

[0016] The waterproof and breathable film body can be easily bonded with the non-woven fabric through the adhesive layer, the release film layer can be easily removed in actual use, the bonding effect is ensured, the composite functional layer has the performance of adsorbing harmful substances and inhibiting bacteria, the adsorption layer can effectively remove odors and harmful substances in the air, the antibacterial agent particle layer can effectively inhibit the breeding of bacteria in the waterproof and breathable film body, the reinforcing fiber layer can enhance the structural strength of the waterproof and breathable film body, the tearing problem that may occur in the composite process is effectively avoided, the air permeation hole enables the waterproof and breathable film body to have good air permeability while maintaining waterproof performance, the anti-static layer has an anti-static effect, effectively preventing the static problem caused by friction of the waterproof and breathable film body during use, avoiding the occurrence of adverse phenomena such as static cling, and improving the stability and reliability of the product. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a structural schematic view of the utility model.

[0018] Fig. 2 It is a structural schematic view of the composite functional layer of the utility model.

[0019] Reference signs:

[0020] 1-waterproof and breathable film body; 11-adhesive layer; 12-composite functional layer; 121-adsorption layer; 122-antibacterial agent particle layer; 13-base film layer; 14-reinforcing fiber layer; 15-anti-static layer; 16-bottom film layer; 17-air permeation hole; 2-release film layer. DETAILED DESCRIPTION

[0021] The embodiments of the utility model will be described below in combination with the drawings and related examples, and the embodiments of the utility model are not limited to the following examples, and the utility model relates to the necessary components in the related technical field, which should be regarded as the known technology in the technical field and can be known and mastered by the technical personnel in the technical field.

[0022] As Figs. 1-2 shown, the utility model provides a technical scheme, a waterproof and breathable film combined with non-woven fabric, including waterproof and breathable film body 1 and release film layer 2 bonded on the surface of waterproof and breathable film body 1, waterproof and breathable film body 1 includes adhesive layer 11, composite functional layer 12, reinforcing fiber layer 14 and bottom film layer 16 set in turn from top to bottom, base film layer 13 is clamped between composite functional layer 12 and reinforcing fiber layer 14, composite functional layer 12 is set on the upper surface of base film layer 13, reinforcing fiber layer 14 is set on the lower surface of base film layer 13, reinforcing fiber layer 14 and bottom film layer 16 are clamped with anti-static layer 15, waterproof and breathable film body 1 is internally provided with a plurality of air permeation holes 17 along the thickness direction of waterproof and breathable film body 1.

[0023] The waterproof and breathable film body 1 can be easily bonded with the non-woven fabric through the set adhesive layer 11, without the need for additional adhesive or complex bonding process, thereby improving production efficiency and use convenience, and meanwhile, the design of the release film layer 2 not only protects the adhesive layer 11 from being contaminated during storage and transportation, but also enables the adhesive layer 11 to be easily peeled off during actual use, ensuring the bonding effect.

[0024] The composite functional layer 12 comprises an adsorption layer 121 and an antibacterial agent particle layer 122, which respectively have the performance of adsorbing harmful substances and inhibiting bacteria, the adsorption layer 121 can effectively remove odors and harmful substances in the air, and the antibacterial agent particle layer 122 can effectively inhibit the breeding of bacteria in the waterproof and breathable film body 1, and the fiber layer 14 is woven in a plain weave manner using bamboo fibers, which can enhance the structural strength of the waterproof and breathable film body 1 and effectively avoid tearing problems that may occur during compounding, thereby improving the durability and service life of the product.

[0025] The air permeable hole 17 enables the waterproof and breathable film body 1 to have good air permeability while maintaining waterproof performance, the bottom film layer 16 and the base film layer 13 are both made of film materials with good air permeability, which further ensures the air permeability and waterproofness of the waterproof and breathable film body 1, realizes the perfect combination of waterproofness and air permeability, and the anti-static layer 15 has an anti-static effect, effectively preventing static electricity from being generated due to friction during use of the waterproof and breathable film body 1, avoiding the occurrence of adverse phenomena such as static cling, and improving the stability and reliability of the product.

[0026] As one of the preferred embodiments of the utility model, as shown in Figs. 1-2 The composite functional layer 12 comprises an adsorption layer 121 and an antibacterial agent particle layer 122 arranged alternately on the upper surface of the base film layer 13,

[0027] In the structure of the waterproof and breathable film body 1, the adsorption layer 121 is an activated carbon layer with a thickness of 50-100 mu m, the antibacterial agent particle layer 122 is a nano-silver particle antibacterial layer with a thickness of 50-100 mu m, and the base film layer 13 is an e-PTFE film layer with a thickness of 150-200 mu m.

[0028] Specifically, the composite functional layer 12 is formed by alternately arranging the adsorption layer 121 and the antibacterial agent particle layer 122, and the composite functional layer 12 is bonded to the base film layer 13, the adsorption layer 121 is an activated carbon layer with a thickness of 50 mu m, the antibacterial agent particle layer 122 is a nano-silver particle antibacterial layer with a thickness of 50 mu m, and the base film layer 13 is an e-PTFE film layer with a thickness of 150 mu m.

[0029] The adsorption layer 121 is an activated carbon layer with a thickness of 50 μm, and the activated carbon has a strong adsorption capacity due to its porous structure, when the gas molecules or harmful substances (such as odor, volatile organic compounds, etc.) in the air contact the activated carbon layer through the air holes 17, the molecules will be captured by the micropores on the surface of the activated carbon and adsorbed inside, so as to realize air purification, the antibacterial agent particle layer 122 is a nano-silver particle antibacterial layer with a thickness of 50 μm, and the nano-silver particles have excellent antibacterial performance due to their unique physical and chemical properties, when the bacteria contact the nano-silver particles, the growth and reproduction of the bacteria can be inhibited, and the base film layer 13 is located between the composite functional layer 12 and the reinforcing fiber layer 14, and plays a supporting and connecting role.

[0030] The base film layer 13 adopts an e-PTFE (expanded polytetrafluoroethylene) film layer with a thickness of 150 μm. The e-PTFE film has a microporous structure, and the micropores can effectively block the passage of liquid while ensuring air permeability. The microporous structure of the e-PTFE film allows air molecules to pass freely, thereby realizing the air permeability function. This air permeability enables the waterproof and air-permeable film to maintain the dryness inside while allowing external air to circulate, but the microporous structure is sufficient to block the passage of water droplets and other liquid water.

[0031] As one of the preferred embodiments of the utility model, the release film layer 2 is an antistatic release film with a thickness of 50-100 μm, and the release film layer 2 is composed of the antistatic coating, the PET film and the release coating from top to bottom in sequence.

[0032] As one of the preferred embodiments of the utility model, the adhesive layer 11 is a self-adhesive coating with a thickness of 40-50 μm.

[0033] The adhesion between the release coating and the adhesive layer 11 is temporary, and the purpose is to protect the adhesive layer 11 from pollution and damage during the compounding process. When compounding is needed, the release coating can be easily peeled off from the adhesive layer 11 without damaging the adhesion of the adhesive layer 11. This temporary adhesion and separation feature makes the release film layer 2 have high practicality and convenience in the production and use of the waterproof and air-permeable film. The release film layer 2 is composed of the antistatic coating, the PET film and the release coating from top to bottom in sequence, and has a thickness of 100 μm. The adhesive layer 11 is a self-adhesive coating with a thickness of 50 μm.

[0034] The release film layer 2 serves as a protective layer before the waterproof and breathable film body 1 is combined with the non-woven fabric, prevents the adhesive layer 11 from being contaminated or damaged, ensures the smooth progress of the combination process, the anti-static coating can effectively prevent the generation and accumulation of static electricity, avoids the influence of static electricity on the performance of the waterproof and breathable film body 1, ensures the stability and reliability of the film in the use process, when the waterproof and breathable film body 1 needs to be combined with the non-woven fabric, the release film layer 2 can be peeled off from the waterproof and breathable film body 1, and the waterproof and breathable film body 1 is not damaged, after the release film layer 2 is peeled off, the adhesive layer 11 is exposed and can be quickly bonded with the non-woven fabric, since the adhesive layer 11 is provided with the adhesive coating, the adhesive layer 11 has excellent adhesive performance and stability, and the waterproof and breathable film body 1 can be firmly bonded with the non-woven fabric.

[0035] As one of the preferred embodiments of the utility model, the reinforcing fiber layer 14 is woven by bamboo fibers with a diameter of 100-150 μm in a plain weave manner.

[0036] In the structure of the waterproof and breathable film, the reinforcing fiber layer 14 is woven by bamboo fibers with a diameter of 100 μm in a plain weave manner, the bamboo fibers have high strength and toughness, the reinforcing fiber layer 14 woven in the plain weave manner can significantly improve the overall tear resistance of the waterproof and breathable film, so that the waterproof and breathable film can better resist the damage of external force and avoid tearing or damage.

[0037] The addition of the reinforcing fiber layer 14 enables the waterproof and breathable film to maintain stable performance during long-term use, the wear resistance and corrosion resistance of the bamboo fibers ensure that the reinforcing fiber layer 14 can maintain its structural integrity for a long time, thereby prolonging the service life of the waterproof and breathable film, the gaps between the bamboo fibers in the woven structure of the bamboo fibers of the reinforcing fiber layer 14 constitute micro air permeation channels, and the channels help the free flow of air molecules, thereby improving the air permeability of the waterproof and breathable film.

[0038] As one of the preferred embodiments of the utility model, as shown in Figs. 1-2 The air permeation hole 17 penetrates the adhesive layer 11, the composite functional layer 12, the base film layer 13, the reinforcing fiber layer 14 and the bottom film layer 16 in the thickness direction of the waterproof and breathable film body 1 in sequence, the upper end of the air permeation hole 17 is arranged on the upper surface of the adhesive layer 11, the lower end of the air permeation hole 17 is arranged on the lower surface of the bottom film layer 16, and the pore diameter of the air permeation hole 17 is 20-50 μm.

[0039] The air permeable hole 17 penetrates the adhesive layer 11, the composite functional layer 12, the base film layer 13, the reinforcing fiber layer 14 and the bottom film layer 16 in turn along the thickness direction of the waterproof air permeable film body 1, forms an air permeable continuous channel, the pore size of the air permeable hole 17 is 20 mu m, and the air permeable hole 17 can prevent larger liquid molecules such as water droplets from passing through and can allow smaller gas molecules such as air molecules to pass through freely, thereby ensuring the free flow of air molecules and realizing good air permeability,

[0040] As one of the preferred embodiments of the utility model, the bottom film layer 16 is a 150-200 mu m thick TPU waterproof air permeable film layer, and the anti-static layer 15 is coated by the anti-static liquid containing conductive particles.

[0041] Specifically, the bottom film layer 16 is a 150 mu m thick TPU waterproof air permeable film layer, and the anti-static layer 15 is coated by the anti-static liquid containing conductive particles, and the coating thickness is 50 mu m, wherein the anti-static liquid contains conductive particles, and the conductive particles are carbon black particles or graphite particles or a mixture of the two,

[0042] The bottom film layer 16 is the outermost layer of the waterproof air permeable film, and its main function is to provide waterproof and air permeability. The TPU material has a microporous structure, and the size of these micropores is sufficient to block the passage of liquid water such as water droplets, thereby ensuring the waterproof performance of the film material. When there is moisture in the external environment, the bottom film layer 16 can effectively block the moisture from entering the inside of the film material, protecting the internal structure and the adhesive layer 11 from moisture erosion. The TPU material has waterproof performance, but its microporous structure also allows smaller gas molecules such as air molecules to pass through freely. This air permeability allows the film material to maintain dryness inside while allowing external air to circulate, thereby effectively preventing dampness and mold.

[0043] The anti-static layer 15 is located between the reinforcing fiber layer 14 and the bottom film layer 16, and its main function is to prevent the generation and accumulation of static electricity. The anti-static layer 15 is coated by the anti-static liquid containing conductive particles, and the conductive particles can be carbon black particles, graphite particles or a mixture of the two. The addition of conductive particles to the anti-static liquid gives the anti-static layer 15 good conductivity. By coating the anti-static liquid containing conductive particles, the anti-static layer 15 can form a continuous conductive network on the surface of the film material. This conductive network can effectively prevent the generation and accumulation of static electricity, protecting the film material from static interference and damage.

[0044] The above is only a preferred embodiment of the utility model, and it should be noted that those skilled in the art can make several improvements and refinements without departing from the principles of the utility model. These improvements and refinements should also be considered within the scope of protection of the utility model.

Claims

1. A waterproof and breathable membrane for composite use with nonwoven fabric, characterized in that, The waterproof and breathable film body (1) includes an adhesive layer (11), a composite functional layer (12), a reinforcing fiber layer (14) and a bottom film layer (16) arranged in sequence from top to bottom, a base film layer (13) is arranged between the composite functional layer (12) and the reinforcing fiber layer (14), the composite functional layer (12) is arranged on the upper surface of the base film layer (13), the reinforcing fiber layer (14) is arranged on the lower surface of the base film layer (13), the reinforcing fiber layer (14) and the bottom film layer (16) are provided with an anti-static layer (15), and a plurality of air holes (17) penetrating in the thickness direction of the waterproof and breathable film body (1) are arranged in the waterproof and breathable film body (1).

2. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 1, wherein The composite functional layer (12) includes an adsorption layer (121) and an antibacterial agent particle layer (122) arranged alternately on the upper surface of the base film layer (13).

3. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 2, wherein The adsorption layer (121) is an activated carbon layer with a thickness of 50-100 μm, and the antibacterial agent particle layer (122) is a nano-silver particle antibacterial layer with a thickness of 50-100 μm.

4. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 1 or 2, wherein The base film layer (13) is an e-PTFE film layer with a thickness of 150-200 μm.

5. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 1, wherein The release film layer (2) is an anti-static release film with a thickness of 50-100 μm, and is composed of an anti-static coating, a PET film and a release coating in sequence from top to bottom.

6. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 1, wherein The reinforcing fiber layer (14) is woven by bamboo fibers with a diameter of 100-150 μm in a plain weave manner.

7. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 1, wherein The air holes (17) penetrate the adhesive layer (11), the composite functional layer (12), the base film layer (13), the reinforcing fiber layer (14) and the bottom film layer (16) in sequence in the thickness direction of the waterproof and breathable film body (1), the upper end of the air hole (17) is arranged on the upper surface of the adhesive layer (11), the lower end of the air hole (17) is arranged on the lower surface of the bottom film layer (16), and the air hole (17) has a pore diameter of 20-50 μm.

8. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 1, wherein The bottom film layer (16) is a TPU waterproof and breathable film layer with a thickness of 150-200 μm, and the anti-static layer (15) is coated by an anti-static liquid containing conductive particles.

9. The waterproof and breathable film for use in combination with a nonwoven fabric according to claim 1, wherein The adhesive layer (11) is a non-dry adhesive coating with a thickness of 40-50 μm.

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