TWI634978B - Multifunction pu composite sets with liquid-water impermeable and water vapor permeable function - Google Patents

Abstract

The utility model relates to a waterproof and moisture permeable multifunctional polyurethane composite sleeve comprising at least one set of body and a PU coating layer, wherein the sleeve system is a sleeve body having a plurality of meshes; the PU coating layer is formed by a polyurethane raw material containing a polyethylene glycol structure. Forming and coating the inner surface and the outer surface of all or part of the sleeve body to form a polyurethane composite sleeve, wherein the inner side of the PU coating layer is provided with an atomizing surface to increase the dry comfort of the user wearing the composite sleeve; In this way, the composite sleeve of the present invention can be made to have the properties of toughness, rigidity, elasticity, heat insulation and electrical conductivity in addition to the functions of waterproofing and moisture permeability.

Description

Waterproof and moisture permeable multifunctional polyurethane composite cover

The invention relates to a composite sleeve composed of a special fabric sleeve combined with a polyurethane elastomer film; in particular, a polyurethane material which is provided with waterproof, moisture-permeable, antibacterial and antistatic, is subjected to a special solvent, and various sets of special fabric sleeves are provided. The mold of the body can be immersed in the polyurethane olefin liquid to uniformly cover the surface of the mold, and then through the drying process to make waterproof with special toughness, rigidity, elasticity, heat insulation and electrical conductivity. Moisture permeable multi-functional polyurethane composite sleeve.

At present, a large number of film sleeves are used on the market, such as latex film sleeves for medical personnel to block and protect; latex film sleeves for industrial antifouling and waterproofing; latex film sleeves for cleaning and cleaning generally used; Rubber film sleeves, etc. Since the moisture permeability of the conventional latex or rubber film sleeve is very poor, when the user wears the latex film for a period of time, it will accumulate in the glove due to the perspiration of the wearer, resulting in dampness and sultry heat. Comfortable, and the skin of the wearer is easily swollen, broken or allergic after being soaked for a long time, and it is easy to wet bacteria. Therefore, the film cover of latex or rubber is not suitable for long-term wear.

Furthermore, the latex or rubber film sleeve also has problems such as easy generation of static electricity, difficulty in using the touch screen in the wearable area, and difficulty in decomposition of the material. Natural rubber latex is made from the milky juice of Hevea brasiliensis. Some of the proteins may cause allergic reactions in some people, including allergens caused by direct contact with the skin, and allergies. The original glove dust particles cause allergies caused by breathing into the human body, so it is quite inconvenient to use.

In addition, as disclosed in Japanese Patent Publication No. 201315399, "Waterproof and moisture permeable sleeve and manufacturing method thereof", the method for producing the waterproof moisture permeable sleeve provides a mold which has a predetermined shape; the mold is immersed in a polyurethane ( In the polyurethane, PU), a first film is formed on the surface of the mold; the first film is dried, and the first film is peeled off from the mold to obtain a predetermined shape. Waterproof and moisture permeable sleeve. Wherein, the polyurethane-containing compound comprises silica, porous polysilicon, a solvent, or a combination thereof, and the solvent is dimethyl formaldehyde (DMF), Toluene, acetone, methyl ethyl ketone (MEK), ethyl acetate (EAC), butyl acetate (BAC), water, or a combination thereof.

However, after the inventor of the present invention actually tested the method for producing the waterproof and moisture-permeable sleeve, it was found that the waterproof and moisture-permeable sleeve made by the method and the material was too thick, the elasticity was poor, and the strength was insufficient, and it would break when pulled with a little force. And its thickness also leads to the unsatisfactory moisture permeability of the glove, so it is a failed polyurethane (PU) sleeve, and no one has developed special toughness, rigidity and elasticity in the market and in various literatures. Waterproof and moisture permeable multifunctional polyurethane composite sleeve with heat insulation and electrical conductivity.

At present, there are two types of PU composite sleeve products sold on the market. The first one is to take the part of the general cloth glove (that is, the inside of the finger to the palm part, the back of the finger and the back of the hand), to remove or coat. The cloth PU forms a composite non-slip glove with only a part of the outer surface covered with PU. Due to the characteristics of the conventional polyurethane (PU) material, and the cloth glove used is dense, the PU is difficult to penetrate, so the sleeve is Only a thick PU film is formed on the outer surface of the cloth glove, and the effect of coating the PU inside and outside is not achieved, so that the waterproof and moisture permeability is very poor, and the PU of the surface of the sleeve is in the process of drying the film. The solvent gas generated by the high temperature is rushed out from the surface of the PU film, and a plurality of holes are formed, so that the PU film of the cloth glove can increase the frictional force, but the water repellency, moisture permeability and appearance of the PU film are also affected. The effect is worse, and the PU film which is too thick is not elastic, and the use is more limited and not practical.

The second conventional PU composite sleeve is formed by pre-pressing and forming a PU flat film, and then cutting the PU flat film, and bonding the cut PU film to other fabrics by a high-frequency thermocompression bonding method. The disadvantages are high processing cost, poor structural strength, inconsistent elasticity, very ugly appearance, environmental protection, inconsistent feeling when worn, uncomfortable adhesiveness, and only the characteristics of the PU material in some positions, so the overall PU composite sleeve The waterproof and moisture permeability is very poor, and it is not practical or economical.

Or, according to the novel patent No. M543046, "Waterproof and moisture permeable multifunctional polyurethane composite sleeve" previously filed by the inventor, the system is integrally formed from a polyurethane raw material containing a polyethylene glycol structure, and the polyethylene contained in the polyurethane sleeve is used. The diol structure can make the casing body can effectively prevent the infiltration of liquid water, water vapor, anti-solvent and the like, and supplemented with additives of other polyurethane materials, the casing can have high elasticity, high strength, antibacterial, antistatic, Multi-functional effect of grading; however, since the system is a single-layer film sleeve which is integrally formed, although it has better waterproof, moisture permeable, anti-solvent and the like than the conventional PU sleeve, The film cannot be adjusted according to the requirements of special toughness, rigidity, elasticity, heat insulation and electrical conductivity.

Therefore, the inventors of the present invention have invented the problems of the various PU sleeves disclosed above, and the requirements for the special toughness, rigidity, elasticity, heat insulation, electrical conductivity and the like of the PU sleeve body. .

The object of the present invention is to use a polyurethane (PU) material of a polyether polyol containing a polyethylene glycol (PEG) structure, and to sew a special material having a plurality of meshes, according to an oil dilution solvent and an aqueous dilution. Different solvent, with appropriate immersion technology, water film forming technology and drying technology, to make part or all of the inner and outer surfaces of the body 1 completely covered with PU coating 2 waterproof and moisture permeable The multifunctional polyurethane composite sleeve not only retains the characteristics of the special PU material, but also greatly improves the physical properties of the composite sleeve by the characteristics of the laminated sleeve, and has the best practicality and Economic benefits.

The waterproof and moisture permeable multifunctional polyurethane composite sleeve of the present invention comprises at least one set of body and PU coating layer, and the sleeve system is a sleeve body having a plurality of meshes; the PU coating layer is made of polyurethane containing polyethylene glycol structure The raw material is integrally formed on the inner surface and the outer surface of all or part of the sleeve body to form a polyurethane composite sleeve, and the inner side of the PU coating layer is provided with an atomizing surface to increase the dryness and comfort of the user wearing the composite sleeve. sense.

The waterproof and moisture permeable multifunctional polyurethane composite sleeve of the present invention, wherein the PU coating layer comprises a polyurethane dilution raw material containing a polyethylene glycol structure, and the sleeve is sleeved on the mold by using a mold provided with an atomizing surface. Then, the polyurethane dilution raw material is permeated into the mesh of the sleeve by the immersion technique and simultaneously covers the inner surface and the outer surface of all or part of the sleeve body, and then the PU coating layer is formed into a film by using water film forming technology, and the film is formed. The casing is coated therein, and then dried to form the waterproof and moisture permeable multifunctional polyurethane composite sleeve; the polyurethane dilution raw material containing the polyethylene glycol structure is diluted with an oil dilution solvent.

The waterproof and moisture permeable multifunctional polyurethane composite sleeve of the present invention, wherein the PU coating layer comprises a polyurethane dilution raw material containing a polyethylene glycol structure, and the sleeve is sleeved on the mold by using a mold provided with an atomizing surface. Then, the polyurethane dilution raw material is infiltrated into the mesh of the sleeve by the immersion technique and simultaneously covers the inner surface and the outer surface of all or part of the sleeve body, so that the sleeve body is covered therein, and then dried to make the waterproof The moisture permeable multifunctional polyurethane composite sleeve; the polyurethane dilution raw material containing the polyethylene glycol structure is diluted with water as a solvent.

The waterproof and moisture permeable multifunctional polyurethane composite sleeve of the invention, wherein the mold is pre-impregnated with the polyurethane olefin liquid, and a PU film is formed, and the sleeve is sleeved on the PU film of the mold, and then the immersion technique is adopted. Diluting the polyurethane raw material into the mesh of the sleeve and simultaneously covering all or part of the inner surface and the outer surface of the sleeve, and merging the inner layer of the PU film, so that the sleeve is coated therein to increase the PU coating layer The effect of the inner layer thickness.

The waterproof and moisture permeable multifunctional polyurethane composite sleeve of the present invention, wherein the sleeve body is a sleeve woven from artificial chemical fiber, natural fiber, metal fiber, ceramic fiber or glass fiber; or a plurality of mesh holes can be worn Plastic or rubber sleeve.

In order to further understand the present invention, the embodiment of the optimal waterproof and moisture permeable multifunctional polyurethane composite sleeve is as shown in FIGS. 1 and 2, and includes at least:

The casing 1 is a casing having a plurality of meshes, for example, a casing woven from artificial chemical fibers, natural fibers, metal fibers, ceramic fibers, glass fibers, or the like, or may be provided with a plurality of meshes. Plastic and rubber sleeves are all indispensable, so that the sleeve has the best characteristics of toughness, rigidity, elasticity, heat insulation and electrical conductivity. The above-mentioned sleeve 1 can be used as a glove, a shoe cover, a head cover, a finger sleeve, a joint sleeve, an arm sleeve, a leg sleeve, a garment, a trousers or other sleeve structures which can be worn by various human bodies.

The PU coating layer 2 is integrally formed on the inner surface and the outer surface of all or part of the sleeve body 1 by a polyurethane (PU) material containing a polyethylene glycol (PEG) structure to form a polyurethane composite sleeve. Since the polyethylene glycol has the characteristics of hydrophilic moisture permeability, the polyurethane raw material containing the polyethylene glycol can make the composite sleeve have a high moisture permeability, and can simultaneously maintain good tensile and tear resistance of the polyurethane material. The elastic coating and the like enable the PU coating layer 2 to be used with various sleeves 1; and the polyurethane material is a decomposable material, so that the composite sleeve can achieve environmental protection effects. An atomizing surface 20 is disposed on the inner side of the PU coating layer 2 to increase the dry comfort of the user wearing the composite sleeve.

The polyurethane (PU) raw material may be a combination of any one or more of a silicone oil, a silica powder, a hardener of an isocyanate group (-N=C=O), a titanium dioxide powder, an antibacterial agent, and a coloring agent. Additives to enhance the versatility of the PU coating 2, depending on the needs. Among them, the addition of silicone oil to the polyurethane raw material can provide the composite sleeve with the oil-slip hand feeling and the effect of preventing adhesion between the films, and has the release effect between the PU coating layer 2 and the mold, and contributes to the PU coating layer. The mold release of 2; wherein the addition of cerium oxide powder to the polyurethane raw material provides the dry feeling of the PU coating layer 2, prevents the adhesion between the PU coating layer 2, and causes the surface of the PU coating layer 2 to be dulled. Wherein, adding a hardener containing an isocyanate group (-N=C=O) to the polyurethane raw material further enhances the physical properties and mechanical strength of the PU coating layer 2; wherein the titanium dioxide is a good electron transport material, The addition of titanium dioxide to the polyurethane raw material can produce an antistatic (ie, electrical conductivity) effect, and allows the user to wear the composite sleeve to directly manipulate the touch interface of the electronic product, and the titanium dioxide can make the PU coating layer 2 white, making the composite The sleeve is more beautiful and does not need to add a dyeing agent; among them, the antibacterial agent is added to the polyurethane raw material to make the PU coating layer 2 have the effect of inhibiting the growth of bacteria and mold, and the antibacterial agent can also make medical treatment, The raw worker reduces the chance of indirect contact with germs and molds. The PU coating 2 made of polyurethane raw material containing polyethylene glycol structure can remove water vapor, and the water vapor is taken away by the evaporation. It can keep the composite sleeve dry and reduce the growth of bacteria and mold, and supplement the antibacterial agent to minimize the growth of bacteria and mold. Among them, the dye can be added to the polyurethane raw material according to different use requirements. The PU coating 2 of various sizes, shapes, thicknesses and functions is formulated into a specific color to increase the recognizability of the composite sleeve.

The first step of the method for preparing the waterproof and moisture permeable multifunctional polyurethane composite sleeve, wherein the polyurethane (PU) raw material of the polyether polyol containing a polyethylene glycol (PEG) structure is added to an olefin releasing solvent to form a polyurethane olefin releasing liquid. The above-mentioned olefinic solvent may be an oily dilution solvent (for example, various oily dilution solvents such as dimethylformamide (DMF), a mixed solvent containing dimethylformamide) or water (may be a mixture of pure water or water). .

Further, the mold of the sleeve body 1 is disposed, and the mold has an atomization surface. Since the atomization surface of the mold is rough, the PU coating layer 2 after drying can reduce the contact area with the mold due to material shrinkage, that is, The sleeve body can be easily released from the mold, and the atomized surface of the mold can be used to form the atomization surface 20 on the inner side of the PU coating layer 2 to reduce the contact area of the PU coating layer 2 with the skin, so as to achieve dry and comfortable wear. The effect can be worn by the user for a long time without discomfort (if a smooth surface mold is used, the polyurethane film formed on the smooth surface will adhere to the mold, so that the finished product of the sleeve will be sticky and not easy to demould. And the disadvantage of having a sticky feeling when worn; the aforementioned mold is made of metal, wood, ceramic, or other material that can be made into a mold.

In the second step, the sleeve 1 is placed in the mold, and then all or part of the mold provided with the sleeve 1 is immersed in the polyurethane emulsion, and the polyurethane is released due to the mesh of the sleeve 1. The liquid penetrates into the inner surface thereof, so that the inner surface and the outer surface of the sleeve body 1 can uniformly coat the polyurethane olefin release liquid; in order to increase the thickness of the PU coating layer 2 on the inner surface of the sleeve body 1, the above-mentioned sleeve body can be Before inserting the mold into the mold, the mold is immersed in the polyurethane emulsion to prepare a PU film of a specific thickness (the thickness of the PU film can be adjusted by multiple immersion), and then the sleeve 1 is placed in the mold. The effect of increasing the thickness of the PU coating layer 2 on the inner surface of the sleeve 1 can be achieved by immersing all or part of the mold provided with the sleeve 1 in the polyurethane release liquid.

The immersion operation of the above mold immersed the mold upright culvert into the barrel containing the polyurethane olefin release liquid, and then slowly lifts the mold, so that the surface of the mold is evenly covered with a layer of polyurethane olefin release liquid, and the excess polyurethane olefin release liquid Drip back into the tank, then turn the mold to the direction opposite to the immersion direction, and slowly rotate, so that the polyurethane olefin liquid flows in the opposite direction, and the surface of the mold is leveled and covered more evenly. Avoid the problem of inconsistent thickness of the finished product.

In the third step, when the polyurethane espress liquid is an oily solvent, the mold which uniformly covers the polyurethane olefin release liquid is placed in water to perform a film forming operation in water, and a part of the solvent of the polyurethane olefin release liquid is exchanged with water to the solvent. In the water, the PU is precipitated into a film by utilizing the incompatibility of PU with water. It should be noted that since the sleeve provided with the plurality of meshes is not a flat surface, the overall distribution of the PU is not uniform (the maximum amount of PU at the mesh), and if the mold is directly fed into the oven after the immersion procedure Drying (ie dry processing) will result in different evaporation rate of the solvent, and the film surface at the casing mesh will be eroded and perforated by the slow-solved solvent vapor, resulting in flaws in the film surface. It affects the waterproof and moisture permeable effect of the PU coating layer 2, so it is necessary to use the water film forming technique when using the oily solvent for the polyurethane olefin release liquid, and then it can be dried.

In addition, it is necessary to pay special attention to the fact that when the polyurethane ethylenic liquid is water as a solvent, since the water dissolves and disperses the polyurethane diluent, the mold which uniformly covers the polyurethane emulsion is not suitable for the water film forming technique. Moreover, since the water solvent does not cause the problem of eroding the polyurethane and forming the perforation during the drying process, the mold for uniformly covering the polyurethane olefin liquid can be directly dried in the oven without using the water film forming technique.

In the fourth step, the mold which leaves the water tank is sent to the oven, and the excess moisture and the residual solvent are dried to complete the waterproof and moisture permeable multifunctional polyurethane composite sleeve of the present invention. If it is necessary to increase the thickness of the PU coating layer 2 on the outer surface of the casing 1 to have better tensile strength, tear strength and water pressure stability, the second step to the fourth step may be repeated. The purpose of adjusting the thickness of the PU coating layer 2 on the outer surface of the sleeve 1 can be achieved through multiple immersion and film forming procedures.

It is worth mentioning that the waterproof and moisture permeable multifunctional polyurethane composite sleeve of the present invention has a thicker composite sleeve made by multiple immersion and film forming procedures, and the moisture permeability is not greatly increased by the thickness. The reduction can reduce the influence of the thickness on the moisture permeability of the composite sleeve, so as to ensure that the sweat discharged from the skin can be discharged outside the composite sleeve to keep the skin dry; and the waterproofness of the composite sleeve can reach the standard of high water pressure resistance. This composite sleeve can be used in various industrial, commercial, agricultural, aquaculture, medical, beauty, catering or special work applications in response to various toughness, rigidity, elasticity, heat insulation and electrical conductivity. Moreover, the waterproof and moisture permeable multifunctional polyurethane composite sleeve of the invention also has the anti-solvent property, which allows the user to achieve the effect of blocking the solvent erosion during the wearing process, and avoids the direct erosion of the skin by the solvent, so that the waterproof and moisture permeable is more The functional polyurethane composite sleeve can be applied in a wider range and more practical.

Therefore, the present invention utilizes a polyurethane (PU) material containing a polyether polyol of a polyethylene glycol (PEG) structure, and a casing 1 obtained by weaving a special material having a plurality of meshes, according to an oily dilution solvent and an aqueous dilution Different solvent, with appropriate immersion technology, water film forming technology and drying technology, to make part or all of the inner and outer surfaces of the body 1 completely covered with PU coating 2 waterproof and moisture permeable The multifunctional polyurethane composite sleeve (the inner surface and the outer surface of the portion of the foot sleeve shown in the embodiments of Figures 1 and 2 are completely covered with the PU coating layer 2), the multifunctional composite sleeve not only retains the special PU The properties of the material (PU of PEG-structured polyether polyol) (preventing liquid water penetration, water vapor, solvent resistance, high elasticity, high strength, antibacterial, antistatic, gradable, etc.), and can be set by sandwich The characteristics of the body 1 greatly increase the physical properties (toughness, rigidity, elasticity, heat insulation, electrical conductivity, etc.) of the composite sleeve, and have the best practicality and economic benefits, and constitute the composition of the case.

The above-described embodiments or the drawings are not intended to limit the scope of the invention, and any suitable variations or modifications may be made without departing from the scope of the invention.

1‧‧‧ body
2‧‧‧PU coating
20‧‧‧Atomized surface

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing an embodiment of a foot cover of a waterproof and moisture permeable multifunctional polyurethane composite cover of the present invention. Figure 2 is a cross-sectional view taken along line A-A of Figure 1;

Claims (10)

The utility model relates to a waterproof and moisture permeable multifunctional polyurethane composite sleeve, which comprises at least: a sleeve body which is a sleeve body having a plurality of meshes; and a PU coating layer which is integrally formed by the polyurethane raw material containing a polyethylene glycol structure in the foregoing sleeve body. All or part of the inner surface and the outer surface to form a polyurethane composite sleeve, the inner side of the PU coating layer is provided with an atomizing surface to increase the dry comfort of the user wearing the composite sleeve; the aforementioned PU coating layer will a polyurethane dilution raw material containing a polyethylene glycol structure, the sleeve is sleeved on the mold by using a mold provided with an atomizing surface, and the polyurethane diluted raw material is infiltrated into the mesh of the sleeve by the immersion technique and simultaneously coated The inner surface and the outer surface of all or part of the casing are formed into a film by a water film forming technique, and the casing is coated therein, and then dried to prepare the waterproof and moisture permeable multifunctional polyurethane. The composite sleeve; the polyurethane dilution raw material containing the polyethylene glycol structure is diluted with an oily dilution solvent. The utility model relates to a waterproof and moisture permeable multifunctional polyurethane composite sleeve, which comprises at least: a sleeve body which is a sleeve body having a plurality of meshes; and a PU coating layer which is integrally formed by the polyurethane raw material containing a polyethylene glycol structure in the foregoing sleeve body. All or part of the inner surface and the outer surface to form a polyurethane composite sleeve, the inner side of the PU coating layer is provided with an atomizing surface to increase the dry comfort of the user wearing the composite sleeve; the aforementioned PU coating layer will a polyurethane dilution raw material containing a polyethylene glycol structure, using a mold provided with an atomizing surface, the mold is pre-impregnated with a polyurethane-based liquid release material, and a PU film is formed, and the sleeve is sleeved on the PU of the mold. On the film, the polyurethane dilute material is infiltrated into the mesh of the sleeve by the immersion technique and simultaneously covers the inner surface and the outer surface of all or part of the sleeve, and the PU film of the inner layer is fused, and then formed into a film by water. Forming a PU coating layer, coating the sleeve body therein, and drying the waterproof and moisture permeable multifunctional polyurethane composite sleeve; the polyurethane dilution raw material containing the polyethylene glycol structure Oily diluting solvent dilution operations. The utility model relates to a waterproof and moisture permeable multifunctional polyurethane composite sleeve, which comprises at least: a sleeve body which is a sleeve body having a plurality of meshes; and a PU coating layer which is integrally formed by the polyurethane raw material containing a polyethylene glycol structure in the foregoing sleeve body. All or part of the inner surface and the outer surface to form a polyurethane composite sleeve, the inner side of the PU coating layer is provided with an atomizing surface to increase the dry comfort of the user wearing the composite sleeve; the aforementioned PU coating layer will a polyurethane dilution raw material containing a polyethylene glycol structure, the sleeve is sleeved on the mold by using a mold provided with an atomizing surface, and the polyurethane diluted raw material is infiltrated into the mesh of the sleeve by the immersion technique and simultaneously coated The inner surface and the outer surface of all or part of the casing are coated with the casing, and then dried to form the waterproof and moisture permeable multifunctional polyurethane composite sleeve; the polyurethane dilution raw material containing the polyethylene glycol structure The dilution operation is carried out with an aqueous dilution solvent. The utility model relates to a waterproof and moisture permeable multifunctional polyurethane composite sleeve, which comprises at least: a sleeve body which is a sleeve body having a plurality of meshes; and a PU coating layer which is integrally formed by the polyurethane raw material containing a polyethylene glycol structure in the foregoing sleeve body. All or part of the inner surface and the outer surface to form a polyurethane composite sleeve, the inner side of the PU coating layer is provided with an atomizing surface to increase the dry comfort of the user wearing the composite sleeve; the aforementioned PU coating layer will a polyurethane dilution raw material containing a polyethylene glycol structure, using a mold provided with an atomizing surface, the mold is pre-impregnated with a polyurethane-based liquid release material, and a PU film is formed, and the sleeve is sleeved on the PU of the mold. On the film, the polyurethane dilution material is infiltrated into the mesh of the sleeve by the immersion technique and simultaneously covers the inner surface and the outer surface of all or part of the sleeve, and the PU film of the inner layer is fused, so that the sleeve is coated on the film. Wherein, the waterproof and moisture permeable multifunctional polyurethane composite sleeve is further dried; and the polyurethane dilution raw material containing the polyethylene glycol structure is diluted with an aqueous dilution solvent. The waterproof and moisture permeable multifunctional polyurethane composite sleeve according to any one of claims 1 to 4, wherein the sleeve system is a sleeve woven from artificial chemical fiber, natural fiber, metal fiber, ceramic fiber or glass fiber. body. The waterproof and moisture permeable multifunctional polyurethane composite sleeve according to any one of claims 1 to 4, wherein the sleeve system is a plastic or rubber sleeve that is provided with a plurality of meshes. The waterproof and moisture permeable multifunctional polyurethane composite sleeve according to any one of claims 1 to 4, wherein the polyurethane raw material is added with eucalyptus oil to make the sleeve have a slick feel, prevent adhesion between the films, and an auxiliary sleeve. The effect of demolding; the addition of cerium oxide powder to the polyurethane raw material enables the sleeve to have a dry hand feeling, and can prevent sticking between the sleeves and eliminate the surface of the sleeve. The waterproof and moisture-permeable multifunctional polyurethane composite sleeve according to any one of claims 1 to 4, wherein a hardener containing an isocyanate group (-N=C=O) is added to the polyurethane raw material to further strengthen the sleeve. Physical properties and mechanical strength of the body. The waterproof and moisture permeable multifunctional polyurethane composite sleeve according to any one of claims 1 to 4, wherein the polyurethane raw material is added with titanium dioxide, so that the sleeve body has an antistatic effect and allows the user to wear the sleeve. The body can directly operate the touch interface of the electronic product, and the cover body is white. The waterproof and moisture permeable multifunctional polyurethane composite sheath according to any one of the above claims, wherein the polyurethane raw material is added with an antibacterial agent to have an effect of inhibiting growth of bacteria and mold.