139 results about "Closed cell" patented technology

An expanded bead of polypropylene-based resin formed with a through hole that is defined by an inner peripheral surface and that has an average hole diameter of 1 mm or less. The expanded bead has a closed cell content of 85% or more, an average cell diameter of 50 to 300 μm and an inner surface portion that extends along the inner peripheral surface that has an average cell diameter of 5 to 150 μm which is smaller than the average cell diameter of the expanded bead.

To provide a cell proliferation system, proliferation method, control method, and culture medium bag capable of proliferating various adherent cells and suspension cells. [Solution] Cells are grown in a bioreactor and activated by an activator (e.g., a soluble activator complex). The nutrient supply and gas exchange functions of an automated closed cell proliferation system make it possible to seed at, for example, a low seeding density. By manipulating the parameters of the cell growth environment, cells are placed in specific locations within the bioreactor for efficient exchange of nutrients and gases. System parameters are adjusted to shear any cell colonies that may form during the proliferation phase. Metabolic concentrations are controlled to improve cell growth and viability. Cell retention within the bioreactor is controlled. In some embodiments, the cells include T cells. In other embodiments, the cells include a T cell subpopulation, for example, regulatory T cells (Tregs).

The utility model relates to the field of cell culture, and provides a closed cell culture device. The closed cell culture device comprises a first accommodating body, a second accommodating body, a pump body and a sterile pipeline on-off assembly, wherein the first accommodating body is connected with a first pipeline and is used for cell culture; the second accommodating body is connected with a second pipeline and is used for accommodating a culture medium or cell culture, and the second pipeline is connected with the first pipeline in an on-off manner; the pump body is used for extruding the outer pipe wall of the first pipeline and / or the outer pipe wall of the second pipeline; the sterile pipeline on-off assembly is used for adjusting the first pipeline and the second pipeline to be switched between a pipeline connection state and a pipeline disconnection state; the pump body is used for pumping the culture medium into the first accommodating body from the second accommodating body under the condition that the second accommodating body is used for accommodating the culture medium, and the pump body is used for pumping the cell medium in the first accommodating body into the second accommodating body under the condition that the second accommodating body is used for cell culture. The closed cell culture device is low in environment requirement and low in culture cost.

An article and a method of manufacturing soft seating comprises a rigid, injection-molded thermoplastic substrate are disclosed. The soft seat article comprises an injection molded structural substrate element that may be over-molded with soft open cell polyurethane or other open or closed cell foam materials to create a soft chair. The soft foam outer surface may be upholstered with fabric or other traditional materials to finish the soft chair. The method of manufacturing comprises molding an inner structural shell from thermoplastic materials, encapsulating the inner structural shell in a soft foam material, optionally upholstering the outer surface of the soft foam material, and optionally providing a base

The invention relates to a medical device for treating aneurysms, in particular a stent, including a compressible and expandable grid structure made up of grid elements. The grid structure has at least one closed cell ring which includes at most 12, in particular at most 10, in particular at most 8, in particular at most 6 cells directly adjacent to one another in a circumferential direction of the grid structure. The grid structure is provided at least in certain portions with a covering made of an electrospun fabric which has pores of irregular sizes. The covering includes over a surface area of 100 000 μm2 at least 10 pores which have a size of at least 15 μm2. The covering has a biocompatible, in particular antithrombogenic and / or endothelialization-promoting coating.

The invention belongs to the field of refractory materials, and provides a light heat-insulating refractory brick and a preparation method thereof. The light heat-insulating refractory brick comprises particles, mixed powder and an additional binding agent, the particles comprise, by weight, 10-15 parts of expanded vermiculite and 30-45 parts of closed cell perlite, and the mixed powder comprises, by weight, 15-25 parts of spherical quartz powder and 5-15 parts of perlite dust collecting powder. The raw materials comprise, by weight, 5-10 parts of waste silica brick powder, 5-10 parts of siliceous pyrophyllite powder, 10-15 parts of Jiaozhou white clay, 5-15 parts of sodium montmorillonite powder and 5-15 parts of limonite powder; the additional binding agent comprises the following raw materials in parts by weight: 3-5 parts of binding slurry and 3-5 parts of pre-gelatinized starch. The refractory brick disclosed by the invention is a light heat-insulating refractory brick which is small in volume density, small in heat conductivity coefficient and capable of meeting the requirement of heat insulation in a high-temperature kiln at 900-1000 DEG C in normal-temperature compressive strength.

The invention belongs to the technical field of thermal insulation foaming materials, and particularly relates to an in-situ closed-cell foaming material as well as a preparation method and application thereof. The in-situ closed-cell foaming material is prepared from the following raw materials through foaming and curing reactions: 40-60 parts by weight of a melamine prepolymer; 40 to 60 parts by weight of isocyanate; 1-5 parts by weight of a hydrolysable silane compound; 0.05 to 0.3 part by weight of a catalyst; 5-15 parts by weight of an inorganic cementing material; 1-10 parts by weight of a physical foaming agent; the content of bound water in the melamine prepolymer is 2.0 to 5.0 weight percent. The in-situ closed-cell foaming material provided by the invention has excellent thermal insulation performance, high specific strength and excellent waterproof, moisture-proof and anti-seepage performance, and the combustion performance grade is A2.

The present disclosure relates to physically crosslinked closed cell continuous multilayer foam structures comprising at least one foamed polypropylene / polyethylene layer having a TPU overlay. A multilayer structure comprising at least one layer of a foam composition and at least one layer of a cover composition may be co-extruded, the co-extruded structure is irradiated with ionizing radiation, and the irradiated structure is continuously foamed.

This invention relates to the field of aluminum foam technology and discloses a method for producing closed-cell aluminum foam by blowing, comprising the following steps: (1) raw material preparation; (2) aluminum melt preparation; (3) foam stabilizer mixing; (4) blowing foam; (5) cooling and shaping. This invention forms a closed-loop control system throughout the entire process by orderly coordinating key links such as coating foam stabilizer, melt purification and activation, pre-dispersion mixing, dynamic temperature and pressure foaming, and gradient cooling and shaping: the coating foam stabilizer provides a stable bubble core, the purified and activated melt provides a strong pore wall matrix, pre-dispersion and composite stirring ensure uniform distribution of bubbles throughout the entire area, dynamic temperature and pressure and vibration achieve precise bubble growth, and gradient cooling ensures a stable final structure without cracks. Each step supports and reinforces the others, forming a continuous, uniform, and complete closed-cell network inside the aluminum foam, significantly improving the closed-cell rate, pore size uniformity, and compressive mechanical properties.

The application provides a shell-shaped product with a cavity, a forming die and a preparation process, wherein the shell-shaped product comprises a main body part, the main body part comprises a bottom wall, a side wall and an opening opposite to the bottom wall, the bottom wall and the side wall are combined to form the cavity, the opening is connected with the cavity and an external space of the shell-shaped product, the main body part is integrally formed by a thermoplastic elastomer base material mixed with a supercritical fluid through a supercritical injection foaming forming process, and the closed cell rate of the main body part ranges from 10 to 99%, and the pore diameter ranges from 20 to 300 microns. The supercritical foaming process is adopted to realize the integral forming of the shell-shaped product, the process is simple, and production is efficient; the upper limit of the high closed cell rate and the micron-level pore diameter distribution can further improve the mechanical strength of the foaming material, and the obtained shell-shaped product can simultaneously have the characteristics of ultralow self-weight, natural waterproofness and strong mechanical performance, thereby providing a new idea for the manufacturing of products such as bags and the like.

Foam compositions comprising an inorganic resin matrix or a polymer-derived ceramic matrix are provided, as well as methods of fabricating the same. The foams may or may not contain additional functional fillers to control mechanical and / or thermophysical properties. The foam materials can include a novel combination of tailorable inorganic siloxane resins with unique fillers, and unique methods of producing the desired porosity. Unlike related art foams, the foams of embodiments of the subject invention can be inorganic-resin-based, and can be closed cell foams or semi-closed cell foams.

The invention discloses a high-flame-retardant EVA (Ethylene Vinyl Acetate) foaming material and a preparation method thereof, and relates to the technical field of high polymer materials. The high-flame-retardant EVA foaming material is prepared from a coated functional filler, a nitrogen-doped graphene-like carbon / cobalt nano composite material, EVA, stearic acid, zinc stearate, zinc oxide, a foaming agent AC and dicumyl peroxide, a core-shell combined filler composed of a coated functional filler and a nitrogen-doped graphene-like carbon / cobalt nano composite material is uniformly distributed in an EVA three-dimensional network cross-linked matrix to form a porous material with a uniform closed cell structure, so that the flame retardant property is improved by virtue of a physical barrier effect and a catalytic carbon formation mechanism, and an efficient and stable conductive network is also constructed; the antistatic performance is optimized, and the application range of the EVA foaming material is widened.

The application relates to the technical field of cell culture, and discloses a fully-closed cell culture device, which comprises a three-dimensional culture bin, the inside of the three-dimensional culture bin is provided with a main culture space, the three-dimensional culture bin and a closable bin door structure are combined, the bin door structure comprises a lifting sealing door arranged on the front side of the culture bin body and a switchable partition located in the inside of the culture bin body, and the switchable partition divides the culture space into a plurality of array-arranged culture areas; the device adopts a square three-dimensional culture bin structure, fully utilizes the space geometric characteristics, realizes the maximized utilization of the internal culture space under the same land area, the square structure facilitates the array-arranged culture areas in the horizontal and vertical directions, improves the integration and loading density of the equipment, and significantly enhances the culture flux, so that an efficient and intensive physical platform is provided for multi-batch and large-scale cell culture.

The invention provides a floating platform for solar panel arrays, comprised of at least one modular unit, comprising: a photovoltaic solar panel array; a pair of essentially triangular floats, having an angled upper side, for supporting said photovoltaic solar panel array at an angle; support bars connected above said floats and perpendicular to said angled upper side of said floats, supporting said photovoltaic solar panel array above said floats.In some embodiments, the float may have an angled underside to provide buoyancy and rocking movement upon water. In some embodiments, the float is made of closed cell polyethylene foam.

The present application relates to a treadmill noise reduction mute method, a buffer pad body is arranged between a running plate and a frame, the buffer pad body is composed of a buffer pad base body with an axial cavity inside and a shock absorbing filler filled in the axial cavity of the buffer pad base body, the buffer pad base body is made of a low noise TPS elastomer composite material, the low noise TPS elastomer composite material includes the following weight parts 30-50 parts of butenyl-polydiene-styrene block copolymer, 15-25 parts of polypropylene, 30-50 parts of naphthenic oil, 5-15 parts of nano filler, 3-8 parts of plasticizer, the low noise TPS elastomer composite material has a uniform closed cell microcellular structure with a pore size of 50-200 mu m inside. The buffer pad made of the material has excellent shock absorbing and noise reduction performance, and can effectively solve the problems of limited damping performance of traditional rubber materials and easy permanent deformation.

A disinfecting cap for connection to a medical connector is described, the disinfecting cap comprising a housing having a top wall and a side wall forming a chamber, an open cell foam structure disposed within the chamber, and a closed cell foam structure disposed against the open cell foam structure, the closed cell foam structure has an interference fit between the closed cell foam structure and the inner surface of the housing. The closed cell foam structure may have a polygonal or star shape in which fluid may flow through a gap formed between the closed cell foam structure and an inner surface of the chamber. The open cell foam structure may be impregnated with a disinfectant whereby compression of the open cell foam structure upon insertion of the Luer connector causes the disinfectant to exit.

Absorbent articles are disclosed that, in one embodiment, can comprise feminine hygiene products. The absorbent articles can include a multi-zone absorbent substrate that is placed between a liquid permeable liner and a liquid impermeable baffle. An embossing pattern extends through the liner and into the absorbent substrate. The embossing pattern includes a plurality of closed cell structures that form liquid absorbent pillows.

Disclosed are extruded foam comprising an extruded thermoplastic, closed-cell foam having at least a first surface and comprising: (i) thermoplastic polymer cell walls formed by an extrusion step, with the walls being comprised of at least about 0.5% by weight of ethylene furanoate moieties and optionally one or more co-monomer moieties; (ii) blowing agent contained in at least a portion of said closed cells; and a material different than said thermoplastic, closed-cell foam attached to and / or integral with at least a portion of said first foam surface.

An endoprosthesis extending along a central longitudinal axis includes a plurality of filaments interwoven to form a plurality of closed cells having corners defined by cross-over points formed by the filaments. Each filament is oriented at a different angle relative to the central longitudinal axis. The cross-over points of each closed cell may include proximal and distal cross-over points, and first and second lateral cross-over points, wherein the distal cross-over point is circumferentially offset from the proximal cross-over point of its respective closed cell. A method of manufacturing includes securing a plurality of filaments extending from a braiding machine to a mandrel such that the filaments form a braid tent oriented at an intersecting angle with the mandrel; and interweaving the filaments around the mandrel to form a plurality of closed cells having corners defined by cross-over points formed by the filaments while rotating the mandrel.

The utility model discloses an integral shaft of cell culture reaction kettle relates to reaction kettle technical field, this cell culture reaction kettle's integral shaft, including the shaft body, the shaft body is passed through jar body setting, and is equipped with three independent interfaces in the upper end of shaft body, is liquid connecting port, gas inlet and gas outlet respectively, liquid connecting port is communicated with jar body inside through liquid extraction channel, and gas inlet is communicated with jar body inside through gas inlet channel, and gas outlet is communicated with jar body inside through gas outlet channel. The utility model discloses a bearing, oil seal new seat and oil seal ring seal the part of shaft body and jar body top contact, form closed cell culture environment, establish liquid extraction channel, gas channel and gas inlet channel on the shaft body simultaneously, ensure the effective extraction of liquid in jar body, the even distribution of gas in jar body and the effective discharge of waste gas from top. Not only has improved the operating efficiency of reaction kettle, also has greatly promoted the reliability of experimental result.

An extruded foam is disclosed, comprising an extruded thermoplastic closed-cell foam having at least a first surface and comprising: (i) a thermoplastic polymer pore wall formed by an extrusion step, the wall being composed of at least about 0.5% by weight of an ethylene furanoate portion and optionally one or more comonomer portions; (ii) a blowing agent contained in at least a portion of the closed cells; and a material different from the thermoplastic closed-cell foam, the material being attached to and / or integral with at least a portion of the first foam surface.

Disclosed is an extruded non-crosslinked polyethylene foam containing a metallocene polyethylene, a density of 0.35 g / cc or less, and a closed cell content higher than 70%, methods of making the extruded non-crosslinked polyethylene foam and articles containing the extruded non-crosslinked polyethylene foam.

The utility model relates to new energy battery technical field especially is silica gel foam insulation board for new energy battery, including support mainboard, both sides of support mainboard near the edge all are fixedly installed with sealed square, the utility model places the whole insulation board between both sides battery, improves the heat preservation and heat insulation effect to the battery in the cooperation of both sides closed cell silica gel foam and both sides sealed square, and the cooperation of both sides medium hardness silica gel foam and rubber strip corresponding to it comes to strengthen the buffer effect to both sides battery, the whole insulation board improves the heat preservation effect and also strengthens the buffer effect to both sides battery, makes the electrode material and current collector in the battery interior can keep good contact state, this kind of situation can make the battery resistance maintain stable or reduce, and then reduces energy loss, promotes a series of positive effects such as charge and discharge efficiency.

The application relates to the field of high polymer materials and discloses a preparation method of a foaming piece for preventing collapse of an automobile handrail. The foaming piece is constructed by using polytetrahydrofuran ether glycol and a chain extender to form a polyurethane shape memory matrix and by doping nano microcrystalline cellulose modified by isocyanate group silane. The modified filler is dispersed in the crosslinked network to block the slipping of molecular chains, and the matrix is combined with the thermal shape memory function to make the foaming piece actively recover residual deformation under the triggering of heat, so that anti-collapse support is provided. The preparation method matches the reaction rates of foaming gas production and gel setting through a double-catalyst system, and controls the closed cell rate and the core-surface density difference of the foaming piece through a short-time high-speed mixing process, so that the filler is uniformly dispersed, and finally, the foaming finished product with uniform internal and external structures and meeting the basic tensile strength is prepared.

A phenolic foam and method for manufacturing same are described herein. The foam is formed from a foamable phenolic resin composition, and a blowing agent, the phenolic foam comprising 1 to 5% by weight of red phosphorus based on the weight of the phenolic foam wherein said phenolic foam has a density of from 10 kg / m3 to 100 kg / m3, a closed cell content of at least 85% as determined in accordance with ASTM D6226 and wherein said foam has a FIGRA0.2 MJ of 120 W / s or less, when measured according to EN13823 and a thermal conductivity of 0.023 W / m·K or less, at 10° C., in accordance with EN 13166:2012. The foam has excellent thermal insulation performance and excellent fire performance.

The utility model discloses an assembly type heat preservation and sound insulation composite floor slab, which belongs to the technical field of constructional engineering and comprises a floor slab body, the floor slab body comprises a base layer, a heat preservation and sound insulation layer, an anti-crack layer and a surface layer, the base layer is fixedly connected with the heat preservation and sound insulation layer, the heat preservation and sound insulation layer is fixedly connected with the anti-crack layer, and the anti-crack layer is fixedly connected with the surface layer. According to the assembly type heat preservation and sound insulation composite floor slab, the closed-cell foam plastic cavities can effectively reduce heat conduction, reduce indoor and outdoor heat exchange and reduce building energy consumption, the sound absorption board cavities absorb sound energy, all layers are tightly connected to reduce gap sound leakage, the blocking capacity for air sound and impact sound can be effectively improved, and the sound insulation effect is good. The anti-crack layer buffers stress, protects the internal structure, reduces cracks, prolongs the service life of the floor slab, is firm in interlayer connection, enhances integrity and stability through tongue-and-groove connection, effectively transmits and bears loads, and guarantees building safety.

The present invention provides an innovative mitten for people working outside handling chemicals, solvents, or dirty materials in liquid form. The main body of the mitten comprises two layers including an outer layer made of polyester microfibers and an inner layer made of rubberized material, such as a polyurethane foam. The polyurethane foam has a mixture of open and closed cells, creating a waterproof membrane. The microfiber material in the outer layer of the mitten has a moisture wicking rubberized material adhered to the inside keeping water, oil, conditioner, wax, detailers, tire shines and any other non-flammable liquids off your hands.

The invention belongs to the technical field of compositions of high-molecular compounds, and discloses a polyurethane-based light composite material and a preparation method thereof. According to the composite material, a bio-based dynamic foaming regulating agent based on a carboxymethylated tannic acid derivative is introduced to have a synergistic effect with a micro-fluidic nucleation guide liquid, so that pH response triggering and spatial positioning nucleation are realized in a micro-fluidic chip, and a highly uniform closed-cell structure is formed. The obtained material is high in density and compression strength batch stability, low in heat conductivity coefficient, free of halogenated hydrocarbon and environmentally friendly. The invention provides a polyurethane-based light composite material which is controllable in structure, stable in performance and environment-friendly and a preparation method of the polyurethane-based light composite material. According to the method, through the synergistic effect of a bio-based dynamic foaming regulation and control system and a micro-fluidic nucleation guide technology, precise molding of a foam structure from a nucleation source is achieved, the inherent problem of a traditional foaming process between uniformity and greenness is broken through, and a technical means is provided for green manufacturing of a high-performance light composite material.

The following configuration is used to provide: a closed cell culture vessel equipped with a mechanism capable of reliably discharging the old culture liquid in a culture vessel; a cell culture apparatus; and a cell culture method.　Provided is a closed culture vessel that has an open culture vessel, a closed vessel for sealing the open culture vessel, a liquid feed port for supplying liquid to at least the open culture vessel, and a liquid discharge port for discharging the liquid in the open culture vessel, each above the closed vessel. The liquid feed port is located above the open surface of the open culture vessel, and the tip of a drainage pipe connected to the liquid discharge port is positioned in the vicinity of the bottom surface of the open culture vessel. Also provided are a cell culture device in which the cell culture vessel can be installed, and a cell culture method.

An optical cavity includes a cell having at least one structure with a first end and a second end, a first end-cap configured to removably receive a first mirror, and a second end-cap configured to removably receive a second mirror. The first end-cap is attached to the structure at the first end and has an opening with a center axis. The second end-cap is attached to the structure at the second end and has an opening with a center axis that is axially aligned with the center axis of the first end-cap. The cell can be a closed cell, wherein the structure is a tube axially aligned with the center axis. The cell can be an open cell, wherein the structure is a tube that includes one or more openings through its wall. The cell can be an open cell, wherein the structure includes one or more rods, each off axis from the center axis.