39 results about "Viscous modulus" patented technology

The invention discloses a preparation method of a laser transparent ceramic optical fiber with a waveguide structure based on an Isobam gel-state dip-coating technology. The preparation method comprises the following steps: preparing a core layer of an Nd: YAG transparent ceramic optical fiber by using a gel forming technology; conducting coating of cladding YAG transparent gel slurry in a core gel state (at an intersection point of an elastic modulus and a viscous modulus) by using the gel state dip-coating technology, thereby achieving effective adhesion of a core layer and the cladding, wherein coating thickness is adjusted through time; and finally, conducting warm isostatic pressing and vacuum sintering to prepare the laser transparent ceramic optical fiber with the waveguide structure. By accurately controlling a gel point in the gel state, effective bonding of the core layer and a cladding ceramic material is realized, an interface is clear, and the method is simple and efficient in process and capable of realizing batch and industrial production.

Tyre comprising two beads (20), two sidewalls (30) joining in a crown, and at least one carcass reinforcement (60) extending from the beads through the sidewalls to the crown, the carcass reinforcement being anchored in the two beads by a turn-up around an annular reinforcing structure (70) in such a way as to form in each bead an incoming portion (61 ) and a wrapped-around portion (62), wherein each bead comprises a bead filler (1 10) and an outer band (120), the latter being placed axially outside of both the carcass reinforcement and the bead filler, wherein the outer band (120) is made of a rubber compound having an elastic modulus G' less than or equal to 15 MPa and a viscous modulus G" such that: G" [MPa] = 0.2G' [MPa] - 0.2 MPa, the elastic and viscous moduli being measured at 23 DEG C.

The invention provides cationic-anionic surfactant mixed system gel and a preparation method thereof. The preparation method for the gel comprises the following steps: exchanging a halide ion in a cationic hydrocarbon surfactant solution into a hydroxyl ion through an anionic exchanger to obtain a solution A, and calibrating concentration of the solution A through a standard HCl solution; adding an anionic fluorocarbon fatty acid surfactant and the solution A into tri-distilled water, wherein the sum of concentration of anionic fluorocarbon fatty acid surfactant and solute in the solution A is 0.050-0.130mol.L<-1>, and a molar ratio of the anionic fluorocarbon fatty acid surfactant to the solute in the solution A is (8:2)-(1:1); heating until the hydrocarbon surfactant is completely dissolved, and reacting for 30-60 minutes; cooling the solution to the room temperature and keeping the temperature for 4-8 weeks at 25-50 DEG C after centrifuging and removing foams, so as to obtain the gel. The gel has high elasticity modulus and high viscous modulus, the elasticity is far higher than the viscidity, the gel is formed by closely packing polyhedral vesicles and novel in structure.

Anhydrous antiperspirant gel-solid stick compositions are disclosed comprising a particulate antiperspirant active, a solid non-polymeric gelling agent selected from the group consisting of 12-hydroxystearic acid, 12-hydroxystearic acid, esters, amides of 12-hydroxystearic acid, and combinations thereof; and an anhydrous liquid carrier, the average solubility parameter ((cal / cm 3 ) 0.5 ) is about 3-13; wherein the visible residue index of the composition is about 11-30 L-value, the product hardness is about 500-5000 g·force, elastic modulus (G′) and viscous modulus (G″) The ratio is about 0.1-100.The refractive indices of the particulate antiperspirant active, the solid non-polymeric gelling agent and the anhydrous liquid carrier need not be matched. The solid non-polymeric gelling agent preferably has an average particle size of less than about 1 micron and / or crystalline particles in the form of elongated particles having an aspect ratio greater than about 2. These antiperspirant gel-solid stick compositions provide improved low residue performance, efficacy and aesthetics.

An ink or coating composition is rheologically tested at three or more temperatures which substantially cover the anticipated range of printing operation temperatures expected to be encountered during printing to determine the value of the rheological parameters viscous modulus, phase angle and phase-angle slope, and to identify values of these parameters encountered during printing around which the structural behavior of the ink or coating changes. An ink composition that has a phase angle of at least 55°, a viscous modulus of at least 150 Pa, and a phase-angle slope of at least −0.5° / ° C. exhibits low misting when employed in high speed printing apparatus.

Tire having two beads each comprising an annular reinforcing structure and a carcass reinforcement which is anchored in the two beads by being wrapped around the annular reinforcing structure so as to form, in each bead, a main portion and a wrapped-around portion, wherein each bead comprises an apex situated between the main portion and the wrapped-around portion of the carcass reinforcement, and an outer strip positioned axially on the outside of the carcass reinforcement and of the apex, the apex and the outer strip being made of a rubber compound that has an elastic modulus G′ less than or equal to 15 MPa and a viscous modulus G″ such that: G″[MPa]≦0.2·G′[MPa]−0.2 MPa, the elastic and viscous moduli being measured at 23° C.; wherein the entity formed by the apex and the outer strip has a thickness E(r), the thickness E(r) varying such that, in the range of distances r comprised between 25 and 45% of the height H of the tire, the variation in thickness∂E⁡(r)∂ris less than or equal to −0.25 mm / mm over at least 4% of the height H of the tire, that, in the range of distances r comprised between 15 and 35% of the height H, the variation in thickness∂E⁡(r)∂ris greater than or equal to 0.20 mm / mm over at least 2% of the height H of the tire, and that, in the range of distances r comprised between 10 and 20% of the height H of the tire, the variation in thickness∂E⁡(r)∂ris greater than or equal to −0.10 mm / mm and less than or equal to 0.0 mm / mm over at least 5% of the height H of the tire.

The objective of the present invention is to provide a composition used for producing a whipped cream which can have improved water separation while maintaining moderate overrun, and which further canstably retain a state of cream. The objective is achieved by an oil-in-water type composition for whipped cream, comprising hydroxypropyl methylcellulose, an oil, a non-fat milk solid and water, wherein a ratio of interfacial elastic modulus to interfacial viscous modulus of the hydroxypropyl methylcellulose is equal to or higher than 2.0 when measured with a tensiometer at 25 DEG C using a 0.2%by mass aqueous solution; and the like.

The invention relates to gel prepared from chitosan or chitosan derivatives by multi-crosslinking and a preparation method. By multi-crosslinking chitosan or the chitosan derivatives, the elasticity modulus and the viscous modulus of the gel are increased and the swelling degree of the gel is reduced under the condition that the crosslinking degree of the gel is not increased. The elasticity modulus and the viscous modulus of the chitosan gel can be further increased each time one crosslinking is increased in the multi-crosslinking process, and the viscoelastic modulus of the gel can be increased by multi-crosslinking under the condition of equal crosslinking degree. The crosslinking times of the chitosan gel are selected according to characteristics of the viscoelastic modulus of different tissue parts, so that the viscoelastic modulus of the chitosan gel is matched with the related tissue, the histocompatibility of the gel in the tissue can be improved, and the use quantity of a crosslinking agent which is irritant or toxic to a human body can be reduced. The gel is applied to the field of soft tissue in tissue engineering such as tissue filling and repair, joint viscoelasticity replenishers, biological scaffolds, anti-cicatricial, anti-adhesion and biological glue and the like.

Disclosed are anhydrous antiperspirant gel-solid stick compositions which comprise a particulate antiperspirant active; a solid non-polymeric gellant that is substantially free of dibenzylidene alditol, n-acyl amino acid derivatives, organic polymeric gellants, and inorganic thickening agents; and an anhydrous liquid carrier having an average solubility parameter of from about 3 to about 13 (cal / cm<3>)<0.5>, wherein the composition has a visible residue index of from about 11 to about 30 L-value, a product hardness of from about 500 gram.force to about 5,000 gram.force, a rheology profile defined by a ratio of an elastic modulus (G') to a viscous modulus (G'') of from about 0.1 to about 100. The refractive indices of the particulate antiperspirant active, solid non-polymeric gellant, and anhydrous liquid carrier are not matched. The solid non-polymeric gellant is preferably a crystalline material having an average particle size of less than about 1 mu m, and / or has an elongated particle morphology having an aspect ratio of greater than about 2. These antiperspirant gel-solid stick compositions provide improved low residue performance, antiperspirant and aesthetics.

The invention discloses a coating with high speed and solid content, comprising heavy calcium carbonate, light calcium carbonate, kaolin pigment, polyvinyl alcohol, latex and thickening agents, wherein the solid content is in the range of 69-71 percent, and the PH value is 8.5-10; the coating includes the following components according to the parts by weight: 65-100 of heavy calcium carbonate, 5-100 of light calcium carbonate, 0-15 of kaolin pigment, 0.1-0.6 of polyvinyl alcohol, 9-11.5 of latex and 0.1-0.55 of thickening agents. The invention effectively reduces the high shearing resistance of the coating with high solid content and can satisfy higher coating speed and relatively lower coating quantity by a scraper. The coating integrally uses the theories of surface chemistry and hydromechanics of coating, the particle encapsulation of coating suspension, and the like, and has a certain performance-required rheological property and viscous modulus. The invention is applied to coating machines, obviously reduces the cost of paper per ton and greatly improves the quality of finished paper.