Abstract: A molded article made of a light-diffusing resin composition which can color transmitted light, and use of the molded article are provided. In the molded article made of a light-diffusing resin composition (hereinafter “molded article”), the light-diffusing resin composition contains a thermoplastic resin and transparent particles which are dispersed in the resin and which have a volume-average particle size of 1-100 ?m. The molded article has a total light transmittance of 85% or higher, and a degree of dispersion of 20° or less, wherein the degree of dispersion is defined as a transmission angle at which a light transmittance is 50% of a rectilinear light transmittance when light is emitted to a surface of the molded article in a direction normal to the surface. An average rectilinear light transmittance at wavelengths from 410-500 nm is greater than an average rectilinear light transmittance at wavelengths from 500-600 nm.
Abstract: There is provided a light diffuser which can alleviate glare of light emitted from a light source while preventing a decrease in brightness of the emitted light despite the presence of the light diffuser. The light diffuser, contains a thermoplastic resin and transparent particles added thereto. The light diffuser has a total light transmittance in a range of 50 to 85%, and a wavelength selectivity in a rectilinear light ratio in a range of 1.5 to 5.0, as obtained by following formulas (1)-(3): (wavelength selectivity in rectilinear light ratio)=(rectilinear light ratio of 550-nm light)/(rectilinear light ratio of 450-nm light)??(1) (rectilinear light ratio of 550-nm light)=(rectilinear light transmittance for 550-nm light)/(total transmittance for 550-nm light)??(2) (rectilinear light ratio of 450-nm light)=(rectilinear light transmittance for 450-nm light)/(total transmittance for 450-nm light)??(3).
Abstract: Polymer particles excellent in uniform dispersibility and the use thereof are provided. The polymer particles contain a surfactant, and have a coefficient of variation in the volume-based particle diameter distribution in the range from not less than 13.0% to not more than 25.0%. When 15.0 g of water is added to 5.0 g of the polymer particles so as to disperse the polymer particles in the water by performing a dispersion treatment for 60 minutes using an ultrasonic cleaner, and furthermore when an obtained dispersion liquid is put into a centrifuge tube with an inside diameter of 24 mm so as to be centrifuged, by a centrifugal separator, under conditions that K factor is 6943 and a rotating time is 30 minutes to recover a supernatant, a concentration of non-volatile components in the obtained supernatant is less than 3.5 wt. %.
Abstract: A manufacturing method for porous resin microparticles comprising steps of: heating a polyester thermoplastic resin having biodegradability to a temperature of 80° C. or higher and 200° C. or lower in a glycol ether solvent to obtain a solution, and cooling the solution to precipitate the polyester thermoplastic resin as porous resin microparticles.
Abstract: Composite resin particles comprising 50 to 800 parts by mass of a polystyrene-based resin with respect to 100 parts by mass of a polyolefin-based resin, wherein: when transmission electron microscope (TEM) images obtained by photographing cross-sections of the composite resin particles using a TEM at a magnification of 1,000 are subjected to a binarization processing and areas in the obtained binarized images which correspond to a cross-sectional area of 437.584 ?m2 of the composite resin particles are subjected to image analysis, the polystyrene-based resin satisfies the following requirements: (1) the number of dispersed particles is 180 or more; (2) the maximum of the areas of dispersed particles is 200 ?m2 or less; and (3) the coefficient of variation in dispersion is 100% or more, and the composite resin particles exhibit an inner morphology that includes a mixture of sea-island structure regions and co-continuous structure regions.
Abstract: An article moving device includes a plurality of roller members, a base member which has a bottom plate section and a peripheral wall section and accommodates the plurality of roller members, and a plate-shaped cover member which is detachably attached to the peripheral wall section so as to cover an opening section surrounded by the peripheral wall section, wherein the base member is formed of a material having a flexural modulus of 2500 MPa to 4000 MPa, a first parameter of 7.00 to 18.00, as calculated by the formula: flexural modulus (MPa)×yield stress in tension (MPa)×thickness (mm)/density (g/cm3)/100000, and a second parameter of 2.00 to 10.00, as calculated by the formula: first parameter×nominal tensile strain at break (%)/100.
Type:
Grant
Filed:
September 30, 2015
Date of Patent:
September 4, 2018
Assignee:
SEKISUI PLASTICS, CO., LTD.
Inventors:
Takanori Furui, Nobuhiko Kushima, Yuichiro Soda
Abstract: A resin composite in which a fiber-reinforced resin material comprising fibers and a resin, and a resin expanded body are integrally laminated, wherein the resin expanded body has a hole opened at the interface with the fiber-reinforced resin material and resin of the fiber-reinforced resin material is caused to flow into the hole.
Abstract: A tacky gel sheet having adhesive uses, comprising an organogel having tackiness before curing and having adhesiveness after curing to an adherend, in which the organogel (i) comprises a polymer matrix including a (meth)acrylate-based resin, a plasticizing component having curability, and a curing agent having reactivity with the plasticizing component, and (ii) (1) has a viscoelastic property expressed by a storage modulus of 1.0×103 to 5.0×104 Pa and a loss factor of 0.01 to 2 (at a frequency of 0.01 Hz and at 23° C.), and a storage modulus of 1.0×104 to 1.0×107 Pa and a loss factor of 0.01 to 2 (at a frequency of 100 Hz and at 23° C.) and (2) has a tacking force of 0.01 to 0.15 N/mm2 (at 23° C.) before curing, a tensile shear adhesion strength of 3 N/mm2 or more (at 23° C.) and a tensile adhesion strength of 1 N/mm2 or more (at 23° C.) after curing.
Abstract: A metal panel reinforcing material comprising a resin composition, including a plastic component that has at least curability and is for a crosslinked polymer matrix, a curing agent for the plastic component, a curing accelerator for the plastic component, and a crosslinked polymer matrix, and a sheet-like fiber substrate, in which when the metal panel reinforcing material is stuck to a metal panel having a thickness of 0.8 mm and heated to be integrated into a reinforced metal panel, the metal panel reinforcing material exhibits the following properties to said metal panel: in three-point bending measured at a span of 100 mm, (i) a strength improvement rate of strength at 1 mm displacement is 120% or more, (ii) a maximum strength improvement rate is 200% or more, and (iii) a strain energy up to a maximum point is 0.5 N·m or more.
Abstract: Polyester-based resin particles including a polyester-based resin as a base resin, in which the base resin exhibits a plurality of endothermic peaks corresponding to crystal melting temperatures by DSC measurement, at least one of the endothermic peaks exists in each region of a low temperature side region and a high temperature side region, a maximum endothermic peak of the low temperature side region and a maximum endothermic peak of the high temperature side region exhibit a crystal melting heat amount ratio (low temperature side crystal melting heat amount/high temperature side crystal melting heat amount) in a range of 0.1 to 1.5, and the polyester-based resin particles have a volume average particle diameter of 1 to 50 ?m.
Abstract: Provided is a bead expanded molded article comprising a plurality of resin expanded particles that are fusion-bonded with each other, in which the resin expanded particles mainly include a resin having a glass transition temperature of 180° C. or more.
Abstract: A hydrogel comprising water, a gel strength improving agent, and a polymer matrix containing the water and the gel strength improving agent, in which the polymer matrix includes a copolymer of a monofunctional monomer having one ethylenically unsaturated group and a polyfunctional monomer having 2 to 6 ethylenically unsaturated groups, the copolymer has a hydrophilic group binding to its main chain, and the hydrogel has a breaking strength of 5 kPa or more and a breaking elongation of 200% or more in a tensile test.
Abstract: Composite resin particles including: a polyethylene-based resin and a polystyrene-based resin, wherein the polyethylene-based resin and the polystyrene-based resin are included in the ranges of 50 to 20% by mass and 50 to 80% by mass respectively, with respect to the total of these resins, the polyethylene-based resin is composed of: a first polyethylene-based resin having a medium density to a high density in the range of 925 to 965 kg/m3; and a second polyethylene-based resin which is linear and which has a lower density than the first polyethylene-based resin, and the first polyethylene-based resin and the second polyethylene-based resin are included in the ranges of 90 to 30% by mass and 10 to 70% by mass respectively, with respect to the total of these resins.
Abstract: Disclosed are porous resin particles which contain a polymer of a monomer mixture of a mono(meth)acrylate-based monomer and a polyfunctional vinyl-based monomer. The mono(meth)acrylate-based monomer contains an ethylenic unsaturated group only in a (meth)acrylic acid residue, a hydroxyl group in an alcohol residue, and at least one of an ether group and an ester group in an alcohol residue. The polyfunctional vinyl-based monomer contains two or more ethylenic unsaturated groups. The porous resin particles have a water absorption value of from more than 400 ml to 700 ml per 100 g of the particles and an oil absorption value of from more than 400 ml to 700 ml per 100 g of the particles.
Abstract: Spacer particles for a resin composition layer have a compressive strength at 10% compressive deformation (10% compressive strength) at room temperature (rt) of 0.05 to 10 MPa, have a rate of change in 10% compressive strength-by a temperature change from rt to 50° C. of 5% or less or have a rate of change in 10% compressive strength by a temperature change from ?20° C. to rt of 30% or less, and have a volume average particle diameter of 2 to 200 ?m and a coefficient of variation in particle diameter of 15% or less.
Abstract: A resin composite in which a fiber-reinforced resin material comprising fibers and a resin, and a resin expanded body are integrally laminated, wherein the resin expanded body has a hole opened at the interface with the fiber-reinforced resin material and resin of the fiber-reinforced resin material is caused to flow into the hole.
Abstract: High-density polyethylene mixed resin particles used as seed particles during seed polymerization, wherein said seed particles contain a mixed resin of 100 parts by weight of high-density polyethylene and 20 to 100 parts by weight of an ethylene copolymer; said high-density polyethylene has a density of 935 to 960 kg/m3 and a softening temperature of 115 to 130° C.; said ethylene copolymer is a copolymer of an ester-based monomer selected from an acrylic acid alkyl ester and an aliphatic saturated monocarboxylic acid vinyl, and etylene, contains 1 to 20% by weight of an ester-based monomer-derived component, and has a softening temperature of 75 to 110° C.; said acrylic acid alkyl ester is selected from methyl acrylate and ethyl acrylate; and said aliphatic saturated monocarboxylic acid vinyl is selected from vinyl acetate and vinyl propionate.
Abstract: A process for producing resin particles includes a step in which a polymerizable mixture including a polymerizable monomer including at least one of a styrene-based monomer and a (meth)acrylic-based monomer, and a polymerization initiator is absorbed into seed particles in an aqueous medium, without using a dispersant, in the presence of an anionic surfactant not having a polyoxyethylene chain but having an alkyl group; and a step in which the polymerizable monomer is polymerized in an aqueous medium, without using a dispersant, in the presence of an anionic surfactant having a polyoxyethylene chain to thereby obtain resin particles. The resin particles include a resin derived from a polymerizable monomer including at least one of a styrene-based monomer and a (meth)acrylic-based monomer. The proportion by number of particles having a particle diameter in the range of from 80 to 120% of the volume-average particle diameter is 85% or more.
Abstract: A light diffuser and its use are provided, which not only reduces a color change in a source light when the light diffuser is disposed on an optical path of a light source, but also has a good light transmission property and a good light diffusion property. The light diffuser contains a thermoplastic resin and transparent particles added thereto. The total light transmittance of the light diffuser is 75% or more. The degree of dispersion of the light diffuser is 2° or more, the degree of dispersion being defined as a transmission angle at which a light transmittance is 50% of a rectilinear light transmittance when light is emitted to a surface of the light diffuser in a direction normal to the surface. The difference between the rectilinear light transmittance at 460 nm and the rectilinear light transmittance at 580 nm of the light diffuser is 0.96% or less.