147 results about "Foam film" patented technology

The invention relates to a method for quickly preparing a large-area graphene foam/polymer fiber three-dimensional network composite foam film. The method mainly comprises the processes of preparation of high-viscosity graphene oxide hydrosol, film formation by rolling, drying and reduction to finally obtain the large-area graphene foam/polymer fiber three-dimensional network composite foam film. The method has the technical effects that the graphene foam/polymer fiber three-dimensional network composite foam film which is controllable in thickness, large-area, high in mechanical strength, high in conductivity, light in weight and high in porosity and has certain elasticity is prepared. The composite film is similar to foam, is a self-supported flexible film, and can be bent and folded; the thickness of the composite film is 5 to 10 times that of a graphene oxide composite film prior to reduction; in the preparation process, expensive equipment and severe conditions are not needed; the composite film is easy to operate, low in cost, short in preparation period and simple in experiment condition, and industrial production can be realized.

The invention relates to a manufacturing method of a graphite heat-conduction membrane. The manufacturing method comprises the following steps of 1, carrying out plasma treatment on a polyimide film, 2, arranging the 3-50 polyimide films treated by the step 1 between two graphite papers, and carrying out heating treatment to obtain a crystalline carbon foam film and 3, carrying out rolling or lamination so that the crystalline carbon foam film is processed to form the graphite heat-conduction membrane with the smooth surface. Compared with the existing manufacturing method, the manufacturing method improves production power by 1-5 times and has a stable yield rate. The graphite heat-conduction membrane has the soft and smooth surface and has no adverse surface and a heat conduction coefficient more than 1800w/(m.k). The heat conduction coefficient of the graphite heat-conduction membrane is higher than the highest value of 1000w/(m.k) of the product shown in the Panasonic patent with an application number of CN1816504A.

A method for producing an at least partially open-celled foam foil on a basis of styrene polymers, nucleating agents, surfactants, physical foaming agents and, if required, further additives, such as foreign polymers and auxiliary materials, comprising a twin-screw extruder with identical parallel screws rotating in the same direction, wherein the twin-screw extruder has a length of at least 25 D (D=screw diameter), in particular 30 to 42 D, with a draw-in and plastification zone of a length of 10 to 15 D, and a mixing zone of a length of 3 to 6 D, and a following cooling zone.

The invention relates to an antistatic EPE foaming film. The antistatic EPE foaming film comprises the following components: 90 to 95 portions of carriers, 0.5 to 2.0 portions of antistatic master batches, 1 to 3 portions of lubricant, 1 to 2 portions of auxiliary agent and colored master batches; the preparation process comprises the steps of mixing resin carriers, an antistatic agent, a colored pigment master batches, french chalk and distilled glycerin monostearate according to the formula dosage; extruding and plasticizing according to the conventional method; then conducting cooling and shaping on the film; conducting corona treatment and dry lamination after dissection; and compounding other base materials or films together after conducting rubber roll pressurization on the composite surface of the manufactured antistatic film, thereby preparing double-layered antistatic air cushion film with different functions. The antistatic EPE foaming film has low content of antistatic agent, no toxic material exists, and the manufactured product can be applied to the packages of products such as electronic elements.

A beauty care product is provided. The beauty care product has a multi-layered barrier patch with a non-foamed first layer and a foamed second layer. The non-foamed first layer has a non-foamed polymer film with a first surface and a thickness from 5 microns to 250 microns. The foamed second layer has a foamed polymer film comprising a Mean Void Volume Percentage from 45% to 80% and a thickness of from 10 microns to 250 microns. The beauty care product also has a cosmetic composition with an effective amount of a skin active agent and a pressure sensitive adhesive.

The invention relates to a method for preparing a graphite film with high heat conductivity. According to the method, a macromolecular film serves as a main raw material, surface groups of the film are activated through plasma treatment, then, a crystalline carbon foam film, of which the main component is carbon, is prepared through stepwise heating while factors, such as atmosphere and pressure, are controlled, and then the graphite film with high heat conductivity, which has soft and smooth surfaces and uniform thickness, is obtained through a rolling or laminating process. The graphite film prepared by using the method disclosed by the invention is uniform in thickness and high in heat conductivity.

The invention discloses a graphene composite foam film. The graphene composite foamfilm comprises a graphene foam film and a high-molecular polymer, the graphene foam film is provided with pores, the high-molecular polymer is distributed in the pores and on the surface of the graphene foam film, and the graphene foam film accounts for 40-95 wt% of the total weight of the graphene composite foam film.

The invention discloses a composite foam film and a preparation method thereof. Nano-particles are used as a filler, a polymer is used as a base material, the nano-particles are dispersed in a solution of the polymer, and then curing film formation and freeze-drying treatments are carried out to prepare the nano-particle/polymer composite foam film with a light, soft and porous structure and an electromagnetic shielding property. The addition of the nanoparticles increases the pore size of the composite foam film, improves the conductive pathway of the composite foam film and significantly improve the electrical conductivity and the electromagnetic shielding property of the composite foam. The composite foam film prepared in the invention has a great application scenario in the field of electromagnetic shielding.

The invention provides a graphene composite heat-conducting gasket which comprises a plurality of layers of graphene foam films arranged in the thickness direction and an adhesive, and the graphene foam films account for 50 wt.%-95 wt.%. The invention also provides a preparation method of the graphene composite heat-conducting gasket, wherein the preparation method comprises the steps: stacking the graphene foam films layer by layer and putting the graphene foam films into a mold, and applying pressure to tightly fit the films; uniformly coating the periphery of the graphene heat-conducting foam films subjected to pressure application with the adhesive, so as to completely coating a plurality of layers of graphene heat-conducting foam films into a block body; after the block body is cured and formed, cutting the block body into sheets along the stacking direction; dipping the cut sheets in dipping glue, taking out the sheets, and carrying out hot press molding on the taken-out sheets; and trimming the edge of the formed sheets, and removing an adhesive bonding area on the edge to obtain the graphene composite heat-conducting gasket. The heat-conducting gasket is low in density, high in heat conductivity in the thickness direction and low in heat resistance.

The invention belongs to the field of a composite material, relates to a copper foam film material and especially relates to a preparation method for a bionic super-hydrophobic film taking copper foam as a substrate and an application thereof. The method comprises the following steps: firstly, pre-treating the copper foam and removing surface impurities; soaking in an aqueous solution containing ammonium persulfate and phosphate, thereby forming a hierarchy structure on the surface thereof; modifying the surface with the hot steam of silane coupling agent aqueous solution, thereby acquiring the bionic super-hydrophobic film taking the copper foam as the substrate. The prepared hydrophobic film is subjected to bionic in-situ growth and chemical steam modification on the copper foam surface; the papillary micro-nano scale dual roughness is formed by the nanosheet on the surface; the prepared hydrophobic film can be used for separating oil from water; the acquired super-hydrophobic film inherits the advantages of developed pore structure, excellent mechanical properties, stable surface rough structure and hydrophobic property, high reusability and high operability of the copper foam; the soil-water separation efficiency is obviously increased; the continuous efficient soil-water separation is realized; the bionic super-hydrophobic film is an oil-water separating material with prospects.

The invention provides a method for applying a foam chemical by extruding a foam film through flow paving. The method is characterized by comprising the following steps: forming chemical foams by virtue of a foam generating device, applying the chemical foams on a fabric, and breaking the chemical foams to transfer the chemical onto the fabric. The method for applying the chemical foams on the fabric is as follws: the chemical foams pass through slit type foam extrusion devices which are distributed transversely and evenly to form the foam film and are applied on the fabric through flow paving or on a rotating guide roller to be transferred onto the fabric. Therefore, the water consumption is reduced and the traditional process is optimized.

The present invention provides a PTP or film for foam packaging in which the heat shrinkage ratios of the outermost barrier layer and the moisture absorption layer containing a desiccant are approximately equal, which is a PTP laminated with an adsorption layer and an outermost barrier layer The film for foaming is characterized in that the adsorption layer has at least one adsorbent selected from the group consisting of physical adsorbents and chemical adsorbents.

The present invention relates to the use of particular blends of LLDPE and LDPE together with specific fabrication conditions to make foamed sheets of thin gauge with MD tear properties similar to an equivalent gauge non-foamed sheet of the same composition. In particular, blends which combine a high MI LLDPE rich fraction with a low MI branched LDPE minor fraction provide the adequate balance ofmechanical strength of the polymer base with its melt strength, extensibility and stress relaxation, allowing a thin foam film with MD tear strength which is comparable to non foamed counterparts of similar gauge and composition. The foamed films of the present invention are thin (generally from about I to 10 mils thick), and have an MD tear strength of at least about 160 grams for a 3 mil film as measured by ASTM D 1922. The foamed films of the present invention are preferably made at least in part from blends which comprise from 10 to 95 percent by weight of LLDPE having a relatively high (1.5 to 6) MI and from 5 to 90 percent of an LDPE resin having a relatively low MI (0.5 to 2.0).

Disclosed is a process for producing a thermoplastic resin foam film that can produce a thin thermoplastic resin foam film. The process comprises the step of cutting a thermoplastic resin foam. The process is characterized in that, in the step of cutting the thermoplastic resin foam, at least one of the thermoplastic resin foam and a blade is reciprocated, and, when at least one of the thermoplastic resin foam and the blade is reciprocated, and the thermoplastic resin foam and the blade are slid in the movement of the foam or the blade on at least one of the advancement path and the return path of the reciprocation movement, whereby the thermoplastic resin foam is intermittently cut.

The invention discloses a composite protein surfactant foaming agent. The foaming agent is prepared by mixing an anionic surfactant or an ampholytic surfactant with a protein anionic surfactant according to the mass ratio of 1:(0.5-3), wherein sodium caseinate is adopted as the protein anionic surfactant, lauryl sodium sulfate or lauryl sodium glycinate or sodium lauryl sarcosinate is adopted as the anionic surfactant, and lauramidopropylamine oxide or cocamidopropyl dimethylamine oxide is adopted as the ampholytic surfactant. According to the composite protein surfactant foaming agent, through the synergistic effect among the different types of surfactants, the surface tension of the system solution is reduced, the water carrying capacity of a film is improved, the thickness of the foam film is increased, and therefore the foam strength is improved. The foaming agent has the advantages that few components are contained, the using amount is little, no other auxiliary needs to be added, foaming is rapid, the foaming amount is large, the stability is very good, and the compatibility with concrete grout is good.

The invention discloses a preparation method for foamed yarns. The preparation method includes preparation of a main material, preparation of an auxiliary agent, padding treatment and preparation of the foamed yarns. The preparation method has the advantages that polyether polyol, isocyanate and a tin catalyst are mixed to obtain the main material, a mixed solution of the polyether polyol, an amine catalyst, a foaming agent and a foam stabilizer is used as the auxiliary agent, an in-situ polymerization method is applied, the raw materials required for reaction are respectively padded on two yarns, solution mixing is simulated through twisting, uniform and compact polyurethane foam is formed by the yarns from inside to outside, the adhesion of a foam film layer is improved, and accordingly,the foamed yarns with unique appearances are obtained; different base materials can be prepared into fabrics with different shapes according to needs, and accordingly, the plasticity is high; the preparation method is simple, the consumed time is short, the equipment requirements are low, and wide application can be realized.

The invention discloses a preparation method of thermoplastic polyurethane foam leather. The method comprises steps as follows: 1) performing dry mixing on TPU resin, a chain extender, a gas barrier, a compatilizer and a nucleating agent; 2) adding a mixture to a barrel of an extruder, heating the mixture by the extruder to obtain TPU melt, injecting supercritical N2 into the TPU melt at the speed of 1-30 ml/min, uniformly mixing the TPU melt and the supercritical N2, gradually decreasing the temperature of the melt to 155 DEG C by a heat exchanger after mixing, and extruding the mixed melt through a slit die to obtain an expanded TPU film, wherein the temperature of the die of the extruder in the extrusion process is 140-160 DEG C and the pressure of the die of the extruder is 5-25 MPa; 3) performing drawing thinning on the TPU film by an uniaxial drawing device at the temperature of 130-160 DEG C for less than 15 s to prepare a TPU foam film, and attaching the TPU foam film to cloth at the high temperature to obtain TPU foam leather. With the adoption of the method, the defects that the TPU foam film in the TPU foam leather has higher density and larger foam are overcome.

A sanitary cleaning device comprises a heat exchanger (700), a cleaning nozzle (831), a foam generating unit (560) to generate cleaning foam, a spray nozzle (550) to discharge cleaning water or cleaning foam, a spray nozzle driving unit (550a) to drive and rotate the spray nozzle (550), an on-off valve (530a) to open and close a branching channel to the spray nozzle (550), and a controlling unit (130). The spray nozzle (550) is disposed in a body by the axis of rotation Ax of the spray nozzle (550) being inclined in the front-rear direction and the right-left direction. The inclination in thefront-rear direction is such that the lower part in the direction of the axis of rotation inclines toward the front part of a toilet, and the inclination in the right-left direction is such that the lower part in the direction of the axis of rotation inclines toward the cleaning nozzle (831). Thus, adhesion of contaminants is suppressed by a foam film being formed on the inner face of the toilet from the front to the rear.

The invention relates to a device for determining dilational viscoelasticity of a liquid film, belonging to devices for determining physical and chemical properties of a foam film and comprising a liquid film generating device and an upward-downward displacement and sinusoidal vibration generating device. Due to the design of a liquid feeding pressure adjustment system and an overflow groove of the liquid film generating device, a liquid film thicker or thinner than that generated by natural gravity liquid-discharging can be obtained, furthermore, the liquid-discharging progress is reversible, and the film thickness control is more accurate, a repeat experiment and a comparative experiment are facilitated, and the level of an upper ring of the device is easy to adjust.

The invention discloses a polyethylene foamed packaging film and a processing method thereof. The polyethylene foamed packaging film is characterized by comprising a high polymer layer I, a foaming layer, a high polymer layer II, a metal composite layer and a partition layer in sequence, wherein the high polymer layer is made of a PET12 material; the foamed layer is made of an EPE147 material; the high polymer layer is made of the PET12 material; the metal composite layer is an aluminum foil layer made of an AL12 material; the partition layer is made of a PEY45 material. The polyethylene foamed packaging film is of a five-layer structure, the quality performance of the polyethylene foamed film is greatly improved, the high polymer layer I is combined with the partition layer after being combined with the foamed layer, the high polymer layer II and the metal composite layer in a processing process, and finally total compounding is peformed, so that the quality performance of the polyethylene foamed film is improved, and the flexibility, the mechanical strength, the surface strength and the surface evenness of the polyethylene foamed film are improved.

The invention discloses a powdery gangue foaming agent. Main points of the technical scheme are as follows: the powdery gangue foaming agent is composed of gangue, hyperviscous attapulgite, active attapulgite, sodium dodecyl sulfate, sodium percarbonate, sodium polyacrylat, sodium acid pyrophosphate and sodium poly(naphthaleneformaldehyde) sulfonate; and the ingredients of the powdery gangue foaming agent undergo stirring, milling and packaging to obtain a finished product, namely the powdery gangue foaming agent. The powdery gangue foaming agent has advantages of strong foaming capability, high bubbling times, large quantity of foams produced per unit volume, good toughness of outer foam film capable of not being easily broken, good foam stability, no defoaming for a long time, fine foam, uniform size of pores generated inside a medium, low bleeding amount, good compatibility of the medium used and the like. Products produced by the use of the powdery gangue foaming agent can be used to effectively control noise pollution and also have functions of heat insulation and air purification. The powdery gangue foaming agent is suitable for production of lightweight sheet materials, lightweight walls and noise reduction products.