10results about How to "Low moisture permeability" patented technology

The invention provides a water-based primer coating liquid which is used for a PMMA (polymethyl methacrylate) base film for a polaroid and comprises the following components: 2-6 parts of polyurethane resin, 1-6 parts of acrylate resin, 2-8 parts of a cross-linking agent, 1-6 parts of silicon dioxide particles and 95-110 parts of pure water. According to the coating liquid designed by the invention, the polyurethane resin and the acrylate resin are mixed to serve as matrix resin, the primer layer has excellent surface wear resistance by adjusting the ratio of the polyurethane resin to the acrylate resin, the transmittance of a base film is improved, and meanwhile, the adhesiveness with UV glue is improved.

The utility model provides a multi-layer co-extrusion film for packaging, and relates to the field of co-extrusion films. The multi-layer co-extrusion film for packaging comprises a base layer, a blocking layer is fixedly connected to the surface of the base layer, a first nylon film is fixedly connected to the surface of the blocking layer, an adhesive resin layer is arranged outside the base layer, an aluminum foil layer is fixedly connected to the interior of the adhesive resin layer, and a second nylon film is fixedly connected to the interior of the aluminum foil layer. And the surface of the adhesive resin layer is fixedly connected with a second heat insulation layer. According to the multi-layer co-extrusion film for packaging, the first nylon film is high in tensile strength and tensile strength and large in moisture absorption performance, the moisture resistance of the co-extrusion film is improved, the overall tensile strength and tensile strength of the co-extrusion film are improved through the aluminum foil layer, sunlight irradiation can be reflected, damage of sunlight to food can be reduced, and the second heat insulation layer is good in heat insulation performance. External heat is isolated, the heat insulation capacity of the co-extrusion film is improved, food damage caused by high temperature is avoided, and the protection capacity of the co-extrusion film on food is improved.

This invention discloses a pressure-induced heating composite material, comprising: a flexible support layer, which is a PI film; a first triboelectric material layer, which is a CNT-OH / PVDF-HFP composite film, attached to one side of the flexible support layer; a second triboelectric material layer, which is an AgNW / PDMS composite film, attached to the other side of the flexible support layer; a pyramidal microstructure is constructed on the surface of the second triboelectric material layer; and a thermoelectric conversion layer, attached to either the first or second triboelectric material layer. The thermoelectric conversion layer is prepared by combining Bi2Te3 / Sb2Te3 heterojunction nanosheets, PEDOT:PSS hydrogel, and Ti3C2TxMXene, with each component being doped with each other to form a uniform dot-like spatial distribution structure. The material of this invention exhibits high response under low pressure because the pyramidal microstructure increases the contact area change rate by 400% under low pressure (≤5kPa) and achieves a charge density of 1.2–1.5 mC / m², breaking through the high-pressure triggering bottleneck of existing materials.

The present invention provides a moisture-permeable waterproof laminated fabric (9) in which a nanofiber nonwoven fabric (3) is laminated on one surface of a surface fabric layer (2), and at least one surface of the nanofiber nonwoven fabric layer (3) is a waterproof layer (5). The surface gray fabric layer (2) and the nanofiber non-woven fabric layer (3) are partially bonded through an adhesive (4). In the manufacturing method, a waterproof agent is applied to at least one surface of the nanofiber nonwoven fabric layer (3) and fixed to form a waterproof layer (5), and the nanofiber nonwoven fabric layer (3) and the surface fabric layer (2) are partially bonded by an adhesive (4). As a result, the air permeability and moisture permeability of the moisture-permeable film can be continuously exhibited even in the presence of rainwater and sweat during wearing.

The utility model relates to the technical field of special performance products and composite materials, in particular to a composite material and an absorption article, and the composite material comprises an EPTFE (Expanded Polytetrafluoroethylene) film and a moisture-proof and gas-proof film which are laminated; a through hole is formed in the moisture-proof and gas-proof film; the EPTFE film and the moisture-proof and gas-proof film are bonded and fixed in partial areas; the moisture and gas insulation film is in direct contact with the EPTFE film, or a barrier layer is arranged between the moisture and gas insulation film and the EPTFE film. The composite material provided by the utility model has the advantages of high air permeability and low moisture permeability, so that part of moisture can be discharged from the core body, and the external environment cannot be influenced. In addition, residual liquid in the interlayer space can be sucked back into the absorption layer through the through holes, so that the air permeability of the composite material is kept, and the composite material has good comfort and leakage resistance.

The utility model discloses an invisible paste for lifting buttocks, which relates to the technical field of buttocks lifting and comprises a white easy-to-tear opening, and a PET (polyethylene terephthalate) film is adhered to the lower surface of the white easy-to-tear opening. The utility model solves the problem that the hip lifting trousers in the market at present are generally made of cloth with strong flexibility and are tightened on the body through the cloth to achieve the effects of abdomen curling and hip lifting. However, the body-building clothes bring discomfort to people, and the elasticity of the clothes can be lost along with the use time. The tight body-building clothes can solve the problem that some inconvenience is caused when a woman needs to go to the toilet, can modify the hip curve of the woman with flat, small and non-hip hips, increases the self-confidence of the woman, is comfortable to wear, not only endows the hip-lifting body-building system with more sense of reality, but also improves the body-building effect of the woman. The invisible buttock lifting patch is simple in structure, convenient to use, capable of avoiding the problem that the invisible buttock lifting patch is excessively heavy and inconvenient to wear due to the fact that the invisible buttock lifting patch is completely made of silica gel, light and thin and well solves the invisible problem.

The utility model discloses a paper film for pouring concrete, and belongs to the technical field of concrete forming. The paper film comprises a paper film main body, wherein the paper film main body comprises a waterproof film layer, a craft paper layer, a first plastic bonding layer, a wire clamping layer, a second plastic bonding layer and an aluminum laminated film layer; and an aluminum laminated film layer is arranged on the outer side of the second plastic bonding layer. The paper film is simple in overall structure, easy to form and low in use cost, the aluminum laminated film layer can resist aging and can provide low moisture permeability for the paper film body, the craft paper layer serves as a main pressure bearing layer, the overall thickness and stiffness can be increased, the paper film is not prone to breakage, and the strength requirement in the concrete pouring and forming process can be met; the wire clamping layer is used for enhancing the performance and prolonging the service life of the paper film main body, the strength characteristic of the paper film main body can be obviously improved, and the external expansion resistance is increased, so that the paper film main body is high in strength and toughness, can be applied to building construction, and has a good market prospect.

The present invention is aimed at providing a fertilizer coating material that yields a film having a low moisture permeability. The present invention is also aimed at providing a slow-release coated granular fertilizer, which does not impose an environmental load caused by its coating shell residue after elution, by coating a granular fertilizer with the above-described fertilizer coating material. Further, the present invention is aimed at providing a coated granular fertilizer having a reduced floatability for the use in paddy fields and the like. Provided is a fertilizer coating material that contains a dehydration-condensation product of an OH group-containing resin and an alkoxysilane condensate.

The present invention provides a low moisture permeability flexible biodegradable material and a preparation method thereof, and relates to the technical field of biodegradable materials. The low moisture permeability flexible biodegradable material of the present invention is composed of raw materials such as polyhydroxyalkanoate, polyvinyl alcohol, hydrophobic fumed silica, lanolin magnesium soap, silane coupling agent, erucic acid amide, etc. The low moisture permeability flexible biodegradable material of the present invention is biodegradable and has excellent waterproof and water-blocking properties.

The application discloses a fruit active fresh-keeping material and a preparation method and application thereof. Modified amphiphilic nano carbon particles are selected as a self-assembly coating, and an amphiphilic multi-walled carbon nanotube coating with high bacteriostatic effect is loaded on a self-developed substrate by using a self-assembly coating technology, so that a multilayer molecular film is formed on the surface of the substrate, metabolic gas and moisture permeability are effectively adjusted, the high oxygen resistance, low moisture permeability and excellent bacteriostatic function of the fruit active fresh-keeping material are realized. The fruit active fresh-keeping material prepared by the application contains a plurality of substances with natural bacteriostatic function in raw materials, adopts a substrate and a multilayer molecular film structure, guarantees mechanical properties, has high oxygen resistance, low moisture permeability and high bacteriostatic performance, better blocks microorganisms and environmental pollution, can adjust a fruit storage sealed micro-gas environment, reduces a physiological metabolic rate of the fruit, realizes the functions of prolonging fruit storage time and shelf life, and improves quality safety of the fruit.