41results about How to "Improve bubble stability" patented technology

The weight percentage of a constructional foaming agent is that the anion surface active agent is 40-70%, the cationic surface active agent is 5-30%, the foam stabilizing agent by 5-15%, and the filling agent by 5-15%. The solid raw material is cracked into particle with the diameter smaller than 100 meshes, and mixed evenly, then liquid raw material spray is agglomerated on the solid raw material which is mixed evenly, stirred evenly and dried, even powder is conformed. The invention has advantages of simple process, and being easy to be shaped, hard to be degenerated and convenient for transportation, which has good water solubility and high stability, with less reduction of concrete strength, low cost etc.

The present invention relates to oriented films having improved shrinkage force, shrinkage temperature, tear strength, seal strength and/or bubble stability. For example, the shrink tension of the oriented film stretched at 110° C. is less than 3 MPa. The oriented film comprises a polymer composition comprising at least one ethylene/α-olefin interpolymer, wherein the ethylene/α-olefin interpolymer may have, for example, a M_w/M_n from about 1.7 to about 3.5, at least one melting point, T_m, in degrees Celsius, and a density, d, in grams/cubic centimeter, wherein the numerical values of Tm and d correspond to the relationship: Tm>−6553.3+13735(d)−7051.7(d)².

The invention provides a foaming agent for preparation of water-retaining foam concrete. The foaming agent comprises, by weight percent, 10-30% of anionic surfactant, 5-10% of foam stabilizer, 1-10% of water-retaining agent, and 50-80% of water. The anionic surfactant, the foam stabilizer, the water-retaining agent and the water are added into a reaction container according to the specified weight percentage, the temperature is adjusted to 50-90 DEG C for reaction for 1-3 hours, and uniform and transparent liquid is obtained. The water-retaining foam concrete made of the foaming agent has outstanding water retaining effect and unchanged mechanical strength, and is especially suitable for placement of foam concrete in areas with difficulty in water use or subsequent foam concrete maintenance.

A process for the extrusion of polyethylene having a broad molecular weight distribution wherein the polyethylene is prepared in pellet form, said extrusion taking place in a pelletizing extruder having one or more zones essentially filled with polyethylene and two or more zones partially filled with polyethylene including a feed zone comprising (i) introducing the polyethylene into the extruder at a temperature sufficient to melt the polyethylene; (ii) introducing a mixture of an inert gas and oxygen into at least one partially filled zone with the exception of the feed zone, said mixture containing about 1 to about 21 percent by volume oxygen based on the volume of the gaseous mixture; (iii) passing the molten polyethylene through each zone at melt temperature; and (iv) extruding the polyethylene into pellets and cooling same.

A MEMS vapour bubble generator that uses a heater in thermal contact with a liquid to generate a bubble. The heater is energized by an electrical pulse that is shaped to have a relatively low power, sub-nucleating portion and a high power portion that nucleates the bubble. The thermal energy transferred to the liquid by the sub-nucleating portion speeds up the nucleation of the bubble across the surface of the heater during the nucleating portion. This produces larger, more stable bubble having a regular shape.

The invention relates to air-entraining concrete suitable for plateau areas, and aims at effectively improving the workability and freezing resistance of the concrete in a plateau low-pressure environment, and the air-entraining concrete has the advantages of good bubble stability and high strength after hardening. The air-entraining concrete comprises the following components in parts by weight: 300-500 parts of cement; 50-100 parts of fly ash; 600-1000 parts of sand; 80-300 parts of broken stone 1 with the particle size of 5-10 mm; 160-600 parts of broken stone 2 with the particle size of 10-20 mm; 160-600 parts of broken stone 3 with the particle size of 16-31 mm; 100-200 parts of water; 1-3 parts of nano silicon dioxide; 1-2 parts of a rheological additive; 1-2 parts of an air entraining agent; 0.1-0.5 part of a bubble stabilizer; and 1-10 parts of a water reducing agent.

Copolymers of ethylene and α-olefins having (a) a density in the range 0.900-0.940 g/cm³, (b) a melt index MI₂ (2.16 kg, 190° C.) in the range 0.01-50 g/10 min, (c) a molecular weight distribution (Mw/Mn, by conventional GPC) in the range 2.0-4.5, (d) a comonomer partition factor, C_pf>1, and (e) a melt index MI₂ (2.16 kg, 190° C.) normalized Dow Rheology Index (DRI), [DRI/MI₂] in the range 3-20. The copolymers may be prepared using catalyst systems containing activating supports. The copolymers are suitably prepared in the gas phase preferably in a single reactor. The copolymers exhibit unique properties in particular with respect to their rheology.

The invention includes a copolymer of vinylidene chloride with at least one monounsaturated comonomer and at least one branching monomer in an amount sufficient to increase molecular weight over that of a polymer prepared using the same process and same monomers in the same relative amounts except without the branching monomer, but preferably the branching monomer is present in a quantity not sufficient to result in measurable crosslinking as determined by solubility in tetrahydrofuran at up to 83° C. The invention includes a process for making the polymer and processes for forming the copolymer or compositions thereof as well as articles comprising the copolymer and compositions thereof. The copolymer exhibits improved bubble stability and is particularly useful for processes in which the copolymer is at least partially oriented in formation such as blow molding, formation of monofilament fiber and film blowing.

The invention provides a degradable biological thin film. The degradable biological thin film comprises an inner-layer thin film, a middle-layer thin film and an outer-layer thin film, which are arranged in sequence, wherein the outer-layer thin film is prepared from the following components in parts by weight: 50 to 75 parts of a first polymer, 15 to 20 parts of first modified starch and 10 to 17parts of a first additive; the middle-layer thin film is prepared from the following components in parts by weight: 45 to 65 parts of a second polymer, 20 to 30 parts of second modified starch and 10to 17 parts of a second additive; the inner-layer thin film is prepared from the following components in parts by weight: 50 to 70 parts of a third polymer, 15 to 25 parts of third modified starch and 10 to 17 parts of a third additive; the material component ratios of the outer-layer thin film and the middle-layer thin film are different. Compared with the prior art, the degradable biological thin film has relatively high flatness at a heat sealing part; while the content of the starch is improved, the cost is reduced and relatively good physical performance is also kept.

Provided is an adhesive agent composition comprising: a copolymer in which a polar functional group-containing monomer is polymerized by the content ratio of 10 weight parts to 50 weight parts with respect to 100 weight parts of a (meth)acrylic acid ester-based monomer; thermally conductive inorganic fillers; and a hollow glass filler or gas bubbles. Also provided is a method for preparing the adhesive agent composition, comprising the steps of: preparing a copolymer by polymerizing a polar functional group-containing monomer by the content ratio of 10 weight parts to 50 weight parts with respect to 100 weight parts of a (meth)acrylic acid ester-based monomer; adding thermally conductive inorganic fillers, a surface-active agent, a photoinitiator, and a photocuring agent to the copolymer to prepare a mixture; and adding a hollow glass filler or injecting gas bubbles into the mixture.

The invention discloses a foam stabilizing technology for preparing a foam-like fracturing fluid, comprising the following steps of: S1. adding a foam stabilizing agent into a base fluid of the foam-like fracturing fluid, wherein an addition amount of the foam-like fracturing fluid is 0.5-1.5% of weight of the base fluid; and S2. in a using process of the foam-like fracturing fluid, adding an acidic catalyst A into an acidic solution of the foam-like fracturing fluid, wherein the addition amount of the acidic catalyst A is 1.0-5.0% of the weight of the acidic solution. The beneficial effects comprises: the foam stabilizing technology can control a foaming speed of a system under a high temperature condition, can increase a foam stabilizing capability, and can raise bubble stability, the foam stabilizing capability delays to more than 2-3h, foam stabilizing time is substantially increased, the foam state can be maintained for a long time, superpower liquid-carrying and de-filtration capabilities can be continuously performed, and the usage performance of the fracturing fluid is raised. By adding the 1.0-5.0% acidic catalyst A to the acidic solution, largest continuous foaming time of the foam-like fracturing fluid reaches 8h, and foaming time is controllable.

The instant invention provides a method for improving the bubble stability of a polyethylene composition suitable for blown film extrusion process. The method for improving the bubble stability of a polyethylene composition suitable for blown film extrusion process comprises the steps of: (1) providing a polyethylene composition having a density in the range of 0.900 g/cm³ to 0.970 g/cm³ and an relaxation spectrum index (RSI) value in the range of 10 to 100; (2) oxygen tailoring said polyethylene composition; (3) thereby forming an oxygen tailored polyethylene composition, wherein the RSI value of the said oxygen tailored polyethylene composition increases from 10% to 300% of its initial value; (4) thereby improving the bubble stability of said polyethylene composition.

The invention discloses pleurotus stem dietary fiber prepared with an actinomucor elegans fermentation method. The method comprises the following preparation steps of: A, culturing an actinomucor elegans strain; B, fermenting actinomucor elegans to prepare pleurotus stem dietary fiber: adding 10 percent by volume of the strain obtained in the step A into a mixed liquid of pleurotus stem powder and water, culturing in ventilated state, and fermenting at the temperature 26-30 DEG C to obtain a zymotic fluid; and C, performing after-treatment on the zymotic fluid, wherein the after-treatment mainly comprises a homogenizing step for homogenizing the zymotic fluid under the pressure 120 MPa. The invention further provides a method for preparing a nutritional food or beverage from the obtained pleurotus stem dietary fiber. According to the invention, efficient recycling of pleurotus stems is realized.

A multilayer thermoshrinkable film and a process for manufacturing the same are described. The film is particularly suitable for packaging applications, in particular as a packaging thermoshrinkable hood for enclosing an item or a secondary packaging essentially consisting of polyethylene. The multilayer thermoshrinkable film of the invention comprises: a) at least one first film layer comprising a linear ethylene copolymer having a density of 0.920 to 0.950 g/cm; b) at least one second film layer comprising a first copolymer of propylene with ethylene and/or at least one CH₂═CHR₁ α-olefins, where R₁ is a hydrocarbon radical having 2-10 carbon atoms; and c) at least one third film layer comprising a linear ethylene copolymer having a density of 0.920 to 0.950 g/cm; wherein said at least one first film layer is arranged between said at least one second film layer and at least one third film layer. The multilayer thermoshrinkable film, which has improved shrinkage and seal properties, may be advantageously produced by means of standard symmetrical film extrusion plants.

The present disclosure provides a supported hybrid catalyst which facilitates the preparation of polyolefins having improved bubble stability and exhibiting excellent processability for a blown film while maintaining high transparent haze and improved melt strength, and a method for preparing the same.

A unimodal ethylene-co-1-hexene copolymer that, when in melted form at 190 degrees Celsius, is characterized by a unique melt property space defined by combination of melt elasticity and complex viscosity ratio (shear thinning) properties. A blown film consisting essentially of the unimodal ethylene-co-1-hexene copolymer. A method of synthesizing the unimodal ethylene-co-1-hexene copolymer. A method of making the blown film. A manufactured article comprising the unimodal ethylene-co-1-hexene copolymer.