159results about How to "Improve cell structure" patented technology

Process for the preparation of foamed thermoplastic polyurethanes characterized in that the foaming of the thermoplastic polyurethane is carried out in the presence of thermally expandable microspheres.

Isocyante-based polymer foams containing functionalized nano-scale materials in which the functional groups are OH, NH₂, COOH or NCO groups. The incorporation of such functionalized nano-scale materials into the isocyanate-based polymer foams provides foams with improved properties such as insulation values, mechanical properties and flame retardancy performance properties, including but not limited to k-factor and dimensional stability.

An olefinic thermoplastic elastomer foam of the present invention has a density of less than 700 kg/m<3>, a compression set of less than 60% and a density of elastically effective chains v of preferably 3.0x10<-5 >to 2.0x10<-4 >(mol/cm<3>). An olefinic thermoplastic elastomer composition for preparing the above foam has an equilibrium creep compliance Je<0 >of 1.0x10<-6 >to 5.0x10<-4 >(Pa<-1>) and contains a crosslinked olefin rubber and an olefin plastic in a specific proportion. The olefinic thermoplastic elastomer composition can be prepared by melt kneading a specific crosslinked olefinic thermoplastic elastomer and a specific olefin plastic. The olefinic thermoplastic elastomer composition is preferably foamed by at least one foaming agent selected from an organic or inorganic thermally decomposable foaming agent, carbon dioxide and nitrogen, together with a specific foaming auxiliary such as citric acid. The olefinic thermoplastic elastomer foam is particularly suitable to use as an automotive sponge weatherstrip, a clearance-filling foamed sheet, a building sash sponge seal, a pipe-joint sponge seal, a protect sponge or a thermal insulating sponge tube. The olefinic thermoplastic elastomer composition according to the invention can provide the foams which have no surface roughness, a low density and a low compression set, preferably a good appearance and a kink resistance. The olefinic thermoplastic elastomer foams can be used as substitutes for vulcanized rubbers.

An object of the present invention is to provide a polyimide porous body having an excellent heat resistance, a fine cell structure, and a low relative dielectric constant, and a method for producing the polyimide porous body. The present invention relates to a method for producing a polyimide porous body, comprising a step for applying a polymer solution containing a polyamide acid, a phase separation agent for separating the phases of the polyamide acid, an imidization catalyst, and a dehydrating agent, on a substrate, and drying the polymer solution to produce a phase-separated structure body having a microphase-separated structure; a step for producing a porous body by removing the phase separation agent from the phase-separated structure body; and a step for subjecting the polyamide acid in the porous body to imidization to synthesize a polyimide.

The invention provides a polymer/graphene aerogel composite foam material which is prepared from graphene aerogel and a thermoplastic polymer, wherein the graphene aerogel serves as a framework, the thermoplastic polymer is attached to the three-dimensional net structures of the graphene aerogel, and foam holes with closed pore structures are formed in the thermoplastic polymer. The composite foammaterial has mutually communicated three-dimensional net structures, and the content of the graphene aerogel in the composite foam material is 0.5%-10%. The invention also provides a preparation method of the composite foam material. The invention provides a new idea for solving the problem of agglomeration of graphene in polymer matrix materials.

Foams for filling cavities and crevasses and for forming foamed products are provided. The latex foam may include an A-side containing a functionalized latex and a B-side that contains a crosslinking agent and optionally a non-functionalized latex. The A- and/or B-side contain a blowing agent package or components forming the blowing agent package. The blowing agent package may be the combination of two or more chemicals that when mixed together form a gas or a chemical compound that, when activated by heat or light, forms a gas. In an alternate embodiment, the latex foam includes a functionalized latex, an acid, and an encapsulated crosslinking agent and base. Alternatively, the spray latex foam may include a functionalized latex, a crosslinking agent, and an encapsulated dry acid and dry base. The encapsulating agent may be a protective, non-reactive shell that can be broken or melted at the time of application.

The invention discloses high-strength polyurethane rigid foam, as well as a preparation method and application thereof. The invention introduces a benzoyl imide reinforced polyurethane modifier with a rigid structure; the benzoyl imide reinforced polyurethane modifier, the corresponding high-viscosity aromatic amine polyether polyol, low functionality polyether polyol, special silicon oil for increasing isotropy of the foam, a catalyst with a specific structure, water and a foaming agent are used for preparing the premixed polyether polyols and react with the polyisocyanates to generate the high-strength polyurethane foam. The polyurethane rigid foam provided by the invention has the characteristics of low batch charging density, high compressive strength, low heat conductivity coefficient and good size stability under low temperature, and can be used in the household appliance inside insulating materials such as the fridge, the refrigerator, the solar energy, the gas water heater and the disinfection cabinet.

An apparatus and method for creating a venturi effect through an orifice.

The invention relates to a polylactic acid foamed sheet and a preparation method thereof. The foaming ratio of the polylactic acid foamed sheet is 20 to 30 times; the pore density is 10.2-13.4*10<9> pores for each cubic centimeter; the diameter of pores is 4 to 15 [mu]m, and the thermal deformation temperature is 95 to 105 DEG C. According to the preparation method, polylactic acid is taken as thematrix, a nucleating agent and a chain extender are added to obtain a mixture; the mixture is extruded in a double screw extruder to obtain polylactic acid foamed modified resin; then the modified resin and optionally picked color master batch are added into the hopper of a foaming extruder composed of two extrusion systems, which are serially connected; the mixture is melted and plasticized in the primary extruding system, then a foaming agent is added, then the mixture is mixed and cooled in the secondary extruding system to obtain low temperature homogenous melt; the melt is extruded fromthe head of a controllable foaming machine, and finally the foamed sheet is obtained after sizing cooling, part spreading, and rolling. The provided polylactic acid foamed sheet has the advantages ofhigh foaming ratio, good foaming performance, good heatproof property, good pore structure, simple technology, and controllable cost.

A system and apparatus for treatment of cellular structure anomalies, principally in human patients, utilizes precisely controlled electromagnetic wave energy and electromagnetic field energy. The former energy is generated from a combination of coherent and incoherent light energy which is joined and focused on patients thru a unique arrangement of faceted coated reflectors and filters. The latter energy is generated in part by unique coils surrounding the light sources which include coils wound with bifilar wire. The disclosed apparatus also includes a platform, preferably segmented, that facilitates alignment of a patient's bodily area needing treatment. Additional coils are placed in the platform in strategic locations proximate the area of the patient to be treated. A digital control module can be programmed to regulate the frequency, duration, phase, duty cycle, pulse and amplitude of all energy sources in the claimed systems.

The invention relates to biomass-based polyurethane foam containing vegetable oil residue, which is composed of a biomass liquification product, a catalyst, a foam stabilizer, vegetable oil residue and isocyanate. The invention also relates to a preparation method of the biomass-based polyurethane foam containing vegetable oil residue. The polyurethane foam provided by the invention has better degradation property, thus waste biomass is completely utilized and the pressure of petrochemical resources is reduced; the preparation cost is lower, and the raw materials are inexpensive, easily available and renewable; and the pore structure of the polyurethane foam material is improved and the compressive strength of the foam is improved.

Process for making crunchy flavorful nut products comprising contacting raw nuts with a water source effective to moisten the nuts without immersing the nuts in the water source, and roasting the moistened nuts. The nut products are crunchy and retain nut flavor when processed in this manner.

Materials and methods for providing building barriers are provided. The material may comprise a latex foam, which may include an A-side containing a functionalized latex and a B-side that contains a crosslinking agent and optionally a non-functionalized latex. The A- and/or B-side may contain a blowing agent package or components forming the blowing agent package. The blowing agent package may be the combination of two or more chemicals that when mixed together form a gas or a chemical compound that, when activated by heat or light, forms a gas. In an alternate embodiment, the latex foam includes a functionalized latex, an acid, and an encapsulated crosslinking agent and base. Alternatively, the spray latex may include a functionalized latex, a crosslinking agent, and an encapsulated dry acid and dry base. The encapsulating agent may be a protective, non-reactive shell that can be broken or melted at the time of application.

A flexible polyurethane foam having a significantly fine cell structure is produced by blowing and curing a mixture of an isocyanate-terminated prepolymer, a cross-linking agent, and a blowing component. The isocyanate-terminated prepolymer is prepared by reacting a polyol component with a polyisocyanate. The polyol component includes at least one low-molecular-weight polyol having a number average molecular weight of 400 to 1,000 and at least one high-molecular-weight polyol having a number average molecular weight of 3,000 to 12,000. The physical association of cells can be inhibited with the aid of the difference in reactivity between the isocyanate-terminated prepolymers derived from the low-molecular-weight polyol and the high-molecular-weight polyol to provide a flexible polyurethane foam having a fine cell structure.

A fabric reinforced closed cell foam composite having a textured or smooth surface which is substantially free of nodular surface irregularities. The fabric may be formed of woven fibers or of non-woven random fibers which are bonded together by resin or heat. The fabric is then coated to a suitable thickness with a foamed or unfoamed polymer formulation. The cushion has a high strength to weight ratio, is substantially impermeable to liquids, significantly dampens sound and absorbs energy. In addition, the cushion is non-slip, remaining substantially fixed in relation to the surface to which it is in contact by means of friction. Further, the surface of the cushion is relatively easily decorated with printed designs. Dyes could also be added to the foam formulation to produce a wide range of decorative colored cushions.

A high-voltage battery system is provided that ensures fail safety against a room-temperature short circuit and a high-temperature short circuit in a high-voltage battery in an electric vehicle. The battery system prevents secondary injury due to fire in a vehicle collision or in maintenance while ensuring fail safety against a room-temperature short circuit and a high-temperature short circuit by implementing a type of safety element that ensures fail safety by improving the structure of a cell tap, that is, by partially reducing the cross-sectional area of a current path such that a conductive portion is rapidly melted by substantially high heat when a short circuit occurs in a battery.