98 results about "Zero shear viscosity" patented technology

An optical cable, which is flame-retardant, and has excellent adhesion of the protective covering to the fiber cladding and uniform thickness of the fiber cladding, contains a polymer optical conductor containing a fiber core; a single-layer or multi-layer fiber cladding; an inner external layer which adheres to the fiber cladding with a peel force of at least 50 N; and an outer external layer which adheres to the inner external layer with a peel force of not more than 30 N. The inner external layer contains a molding composition having a first polyamide selected from a) PA 11, b) PA 12, c) PA 1012, d) PA 1212, e) a copolyamide of at least two of PA 11, PA 12, PA 1012 and PA 1212, said copolyamide containing not more than 30 mol % of a comonomer, and f) mixtures thereof. The first polyamide contains at least 50 mueq/g of amino end groups. The first molding composition has a zero-shear viscosity of from 400 to 6000 Pas. The outer external layer contains a second molding composition which has the following i)-iii): i) from 20 to 95% by weight of a second polyamide selected from a) PA 11, b) PA 12, c) PA 1012, d) PA 1212, e) a copolyamide of at least two of PA 11, PA 12, PA 1012 and PA 1212, said copolyamide containing not more than 30 mol % of a comonomer, f) a polyetheramide of at least one of a)-e), and g) mixtures thereof, ii) from 5 to 45% by weight of a flame retardant, and iii) from 0 to 60% by weight of an impact modifier.

A multi-layered shrink film comprising: at least three layers including two skin layers and at least one core layer; wherein at least one layer comprises from 10 to 100 weight percent units derived from one or more ethylene-based polymer compositions characterized by having Comonomer Distribution Constant in the range of from 75 to 220, a vinyl unsaturation of from 30 to 100 vinyls per one million carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from at least 2.5 to 15; a density in the range of 0.924 to 0.940 g/cm³, a melt index (I₂) in the range of from 0.1 to 1 g/10 minutes, a molecular weight distribution (Mw/Mn) in the range of from 2.5 to 10, and a molecular weight distribution (Mz/Mw) in the range of from 1.5 to 4; and wherein the multi-layered film exhibits at least one characteristic selected from the group consisting of 45 degree gloss of at least 50%, a total haze of 15% or less, an internal haze of 8% or less, 1% CD Secant Modulus of 43,000 psi or greater, 1% MD Secant Modulus of 38,000 psi or greater, CD shrink tension of at least 0.7 psi, and/or MD shrink tension of at least 10 psi.

The instant invention provides nonwoven fabrics and staple or binder fibres prepared from an ethylene-based polymer having a Comonomer Distribution Constant in the range of from greater than from 100 to 400, a vinyl unsaturation of less than 0.1 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1 to less than 2; a density in the range of 0.930 to 0. 970 g/cm3, a melt index (12) in the range of from 15 to 30 or from 10 to 50 g/10 minutes, a molecular weight distribution (Mw/Mn) in the range of from 2 to 3.5, and a molecular weight distribution (Mz/Mw) in the range of from less than 2.

Disclosed is a hair care composition comprising: a discrete particle comprising an oily component, wherein the oily component comprises one or more materials selected from the group consisting of: (A) metathesized unsaturated polyol esters; (B) sucrose polyesters; (C) fatty esters with a molecular weight greater than or equal to 1500; and mixtures thereof, wherein the oily component has a Zero Shear Viscosity at 25° C. of from about 10² Pa·s to about 10⁹ Pa·s, and has a melting point of from about 35° C. to about 60° C.; and wherein the discrete particle has an average particle size in the hair care composition of from about 0.5 microns to about 20 microns. The hair care composition provides improved conditioning benefits, clean feel, and/or hair styling benefit.

Ethylene-based resin, which exhibits a satisfactorily high melt tension and can provide a molded object excellent in mechanical strength, the ethylene-based resin characterized in simultaneously satisfying the requirements [1] to [5] described below: [1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C. is in the range of 0.1 to 100 g/10 minutes;

• [2] density (d) is in the range of 875 to 970 kg/m³;
• [3] ratio [MT/η*(g/P)] of melt tension [MT(g)] at 190° C. to shearing viscosity [η*(P)] at 200° C. at an angular velocity of 1.0 rad/sec. is in the range of 1.50×10⁻⁴ to 9.00×10⁻⁴;
• [4] sum [(A+B)(/1000C)] of the number of methyl branches [A(/1000C)] and the number of ethyl branches [B(/1000C)] per 1000 carbon atoms measured by ¹³C-NMR is 1.8 or less; and
• [5] zero shear viscosity [η₀(P)] at 200° C. and weight-average molecular weight (Mw) measured by GPC-viscosity detector method (GPC-VISCO) satisfy the following relational expression (Eq-1):

0.01×⁻¹³×Mw^3.4≦η₀≦4.5×10⁻¹³×Mw^3.4  (Eq-1)

Provided is an ethylene copolymer with improved elasticity and processibility. More specifically, provided is an ethylene copolymer which exhibits a high zero shear viscosity and a large degree of shear thinning degree, and shows rheological characteristics behaviors differentiated from products manufactured by using the existing metallocene and Ziegler-Natta catalysts. In addition, provided is an ethylene copolymer which has a low processing load, shows differentiated behavior in Van-Gurp Palmen analysis, and exhibits excellent Neck-in characteristics.

An artificial turf comprising a turf yarn prepared from an ethylene-based polymer composition comprising less than or equal to 100 percent by weight of the units derived from ethylene; and less than 30 percent by weight of units derived from one or more α-olefin comonomers; wherein said ethylene-based polymer composition is characterized by having a Comonomer Distribution Constant of equal to or greater than 40, a vinyl unsaturation of less than 100 vinyls per one million carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) equal to or greater than 1.75; a density in the range of 0.915 to 0.930 g/cm³, a melt index (1₂) in the range of from 0.8 to 5 g/10 minutes, a molecular weight distribution (M_w/M_n) in the range of from 2 to 3.6, and a molecular weight distribution (M_z/M_w) equal to or less than 3; and wherein the turf yarn exhibits one or more of the following properties (a) shrink of less than 4.8%, and (b) curl of less than 0.5 is provided.

A cellulose dope comprising an aqueous sodium hydroxide solution and cellulose dissolved in the solution, wherein the cellulose dope has a sodium hydroxide concentration (C_Na) of from 6.5 to 11% by weight, a cellulose content (Cc) of from 5 to 10% by weight, a viscosity average degree of polymerization (DPc) of the cellulose of from 350 to 1,200 and a cellulose dissolution ratio (Sc) of 99.0% by weight or more, and wherein the zero-shear viscosity (η₀) and the cellulose content (Cc) of the cellulose dope and the viscosity average degree of polymerization (DPc) of the cellulose in the cellulose dope satisfy the following formula (1):

η₀=kCc^m×DPc^p  (1)

• • wherein:
  • η₀ represents the zero-shear viscosity (mPa·s) of the cellulose dope,
  • Cc represents the cellulose content (% by weight) of the cellulose dope,
  • DPc represents the viscosity average degree of polymerization of the cellulose in the cellulose dope,
  • k=3.9×10⁻¹¹,
  • m is a number of from 5 to 7, and
  • p is a number of from 3 to 4.

The instant invention provides a linear low density polyethylene composition suitable for cast film, films made therefrom, and packaging devices comprising one or more such film layers. The linear low density polyethylene composition suitable for cast film according to the present invention comprises an ethylene/α-olefin interpolymer composition having a Comonomer Distribution Constant (CDC) in the range of from 40 to 200, for example from 40 to 150, a vinyl unsaturation of less than 0.12 vinyls per one thousand carbon atoms present in the backbone of the ethylene-based polymer composition; a zero shear viscosity ratio (ZSVR) in the range from 1.2 to 5, for example from 1.5 to 4; a density in the range of from 0.910 to 0.935, for example from 0.915 to 0.925, g/cm³, a melt index (I₂) in a range of from 1 to 10, for example from 2 to 6 g/10 minutes, a molecular weight distribution (M_w/M_n) in the range of from 2 to 3.5.

The invention concerns multiaxial fabrics comprising a first layer comprising a plurality of first yarns being substantially parallel in a first direction, a second layer comprising a plurality of second yarns being substantially parallel in a second direction and skew or off-set with respect to the first yarns, transverse yarn interlaced transversely within the layers; wherein each layer is coated with a high viscosity polymer that has a Tg in the range of about −40 to about 0° C., and a zero shear viscosity of about 2×10⁶ to about 10¹³ poise at 20° C.

The invention discloses a long chain branching polylactic resin and a preparation method thereof. In the long chain branching polylactic resin, constitutional repeating units of a main chain and branch chains are lactic acid, wherein branch points on the main chain are tertiary carbon atoms in the lactic acid constitutional repeating units of the main chain. The preparation method comprises the steps of uniformly mixing a solution-mixed aid and a linear polylactic resin, and forming a long chain branching structure through internal melt mixing or double-screw reaction extrusion. The branch chain molecular weight Mb is larger than the entanglement molecular weight Me, the molecular weight is obviously improved, low-frequency end storage modulus G' and zero shear viscosity eta 0 are obviously improved during shear flow, the gel content is less than 1 percent, obvious strain hardening characteristic is shown during extensional flow, the requirement for secondary forming processing is met, and the tensile strength is obviously improved to 64MPa. The resin can be applied to the fields such as foaming, melt spinning and the like, and can be expansively applied to the fields such as foam packaging materials and clothing fibers.

The invention relates to a loxiong viscosity behavior measuring method of a high-viscosity modified asphalt and an application thereof, which comprises the following steps: A. using the shearing rate scan test to obtain the viscosity-shearing rate flow curve of the high-viscosity modified asphalt at 60 DEG C; and B. fitting the curve obtained in the step A to obtain the 60 DEG C zero shear viscosity. The 60 DEG C zero shear viscosity obtained by using the method can be used for evaluating the viscosity behavior of the high-viscosity modified asphalt in a pavement structure. The invention is based on following references: the high-viscosity modified asphalt presents the characteristic of pseudo-plastic fluid at the shearing rate of 1.25*10<-5>s<-1>-1250s<-1>, the viscosity tends to be the zero shear viscosity in a first Newtonian region, and the common range in the first Newtonian region is completely matched with the shearing rate range in the pavement structure in the aspect of magnitude order, so the 60 DEG C zero shear viscosity can effectively reflect the viscosity characteristic of the high-viscosity modified asphalt in the pavement structure.

It has been discovered that improved polystyrene products may be obtained by polymerizing styrene in the presence of at least one multifunctional initiator, at least one chain transfer agent, and at least one cross-linking agent. The presence of the multifunctional initiator tends to cause more branched structures in the polystyrene. A mathematical model that helps optimize the levels of these additives for given molecular weights, melt flow indices (MFIs) and zero shear viscosities (η₀) has also been discovered.

The invention relates to a simplified method for determining zero shear viscosity of high-viscosity modified asphalt and application thereof. The method includes the following steps: A, testing the viscosity and shear rate of the high-viscosity modified asphalt under 60 DEG C through a shear rate scanning test; and B, taking the actual viscosity measured when the shear rate is 10-2s-1 as the zero shear viscosity under 60 DEG C. The actual viscosity measured when the shear rate is 10-2s-1 is taken as the viscosity behavior eigenvalue of the high-viscosity modified asphalt for paving roads, which reflects the true viscosity characteristic of the high-viscosity modified asphalt on the road surfaces. The test method saves test time, and the data processing is simple, without requiring special data processing software, so the method is good for the application and popularization of zero shear viscosity. The characteristic shear rate at zero shear viscosity is 10-2s-1, so viscidities of different high-viscosity modified asphalt at the same shear rate can be compared and the evaluation index is more scientific and more credible.