Patent classifications
B29B7/726
Polybutylene Terephthalate With Low THF Content
The invention relates to injection molded parts, preferably injection molded parts in the form of automotive interior parts, having a low TVOC content and a low tetrahydrofuran content based on polybutylene terephthalate synthesized from butanediol and terephthalic acid, compounded in a compounder under vacuum and subsequently processed by injection molding, wherein TVOC stands for “Total Volatile Organic Compounds”.
TIRE TREAD
A tire tread and a tire are provided, more particularly, a tire having a tread or other elastomeric component within enhanced composite material properties, including, but not limited to, modulus ratio, percent elongation at break, and/or tan delta, wherein the tire, tread or other elastomeric component comprise composites characterized by well dispersed reinforcing filler, which can be indicated by macrodispersion.
ACRYLIC RUBBER SHEET EXCELLENT IN WATER RESISTANCE
An acrylic rubber sheet excellent in storage stability and water resistance, a method for producing the same, a rubber mixture containing the acrylic rubber sheet and a rubber cross-linked product thereof are provided. The acrylic rubber sheet according to the present invention includes an acrylic rubber having a reactive group and having a weight average molecular weight (Mw), a ratio of a Z-average molecular weight (Mz) and a weight average molecular weight (Mw) in a specific range. The acrylic rubber sheet according to the present invention has an ash content of 0.2% by weight or less, an amount of gel insoluble in methyl ethyl ketone is 50% by weight or less, and a water content of less than 1% by weight, and is excellent in water resistance and highly well-balanced in strength properties and processability.
Dispensing Systems And Methods Including Online Remixing Of Thermal Management And/Or EMI Mitigation Materials
Exemplary embodiments are disclosed of systems and methods for dispensing thermal management and/or EMI mitigation materials. The system and methods include online remixing prior to dispensing the thermal management and/or EMI mitigation materials. In an exemplary embodiment, a system includes an online remixer configured to be operable for receiving a supply of the thermal management and/or EMI mitigation material including one or more functional fillers within the matrix, and remixing the one or more functional fillers including filler settlement, if any, within the matrix prior to dispensement of the thermal management and/or EMI mitigation. The remixing may reduce the filler settlement, if any, within the matrix and thereby allow for improved viscosity and flow rate of the thermal management and/or EMI mitigation material.
Biodegradable And Compostable Polymers For Rigid Packaging And Processes For Preparing Same
A biodegradable bioplastic composition of from 80 wt % to 95 wt % of a polymer having one or more thermoplastic polyester polyhydroxyalkanoates (PHA) and from 5 wt % to 20 wt % an organic dispersed within the polymer. The biodegradable bioplastic composition is devoid of petrochemically derived components, fossil fuel derived components, processing aids, and plasticizer additives. A process is also disclosed for preparing the biodegradable bioplastic composition. The process involves compounding one or more thermoplastic polyester polyhydroxyalkanoates (PHA) and an organic to form a mixture and homogenizing the mixture. Homogenizing includes feeding the mixture to a first extruder and extruding the mixture to form a composite composition and feeding the composite composition to a second extruder and extruding the composite composition to form the biodegradable bioplastic composition.
METHOD FOR PRODUCING WATER-ABSORBING RESIN POWDER
Provided is a method for producing a water-absorbing resin powder excellent in water absorption speed. The method for producing a water-absorbing resin powder includes a polymerization step of polymerizing an aqueous monomer solution to obtain a crosslinked hydrogel polymer and a gel-crushing step of crushing the crosslinked hydrogel polymer after the polymerization step using a gel-crushing device to obtain a crosslinked particulate hydrogel polymer, in which the gel-crushing device includes an input port, a discharge port, and a main body incorporating a plurality of rotation axes each including a crusher, and in the gel-crushing step, the crosslinked hydrogel polymer is continuously put into the input port and the crosslinked particulate hydrogel polymer is continuously taken out from the discharge port, the crosslinked hydrogel polymer to be put into the input port has a rate of polymerization of 90 mass % or more, a gel-crushing coefficient is 0.020 J/g.Math.sec or more and 3.0 J/g.Math.sec or less, and the crosslinked particulate hydrogel polymer discharged from the discharge port has a mass average particle diameter of 500 m or less as converted to a solid content.
APPARATUS, METHOD AND COMPUTER PROGRAM PRODUCT FOR SCREW CONFIGURATION INFERENCE
The apparatus of the invention includes: an acquisition unit 101 that acquires input information including resin properties and acquires, as output information, a specified value of a physical quantity related to a kneaded resin or a kneading machine; a storage unit 16 that stores a knowledge file 162 containing correlations among the input information, the physical quantity and a plurality of screw configurations; and a search unit 106 and a configuration generator unit 107 together that infers, on the basis of the input information and the knowledge file 162, such a screw configuration that is able to meet the specified value.
Continuous Production Device and Method for Silane-Modified Sealing Material
A continuous production device and method for a silane-modified sealing material are provided. The device includes a twin screw extruder set, a cooling unit, and a static mixing unit; where the twin screw extruder set includes at least two twin screw extruders in series, each of which is provided with at least two inlets and at least one vacuum port, the cooling unit is disposed between last two stages of the twin screw extruders, and an outlet of a last-stage twin screw extruder is connected to the static mixing unit. Through the arrangement of various units of the device and their positional relations, components can be mixed in sequence or added in stages, so as to adapt to the characteristics of each component; a heat stabilizer and a polymer are added together as raw materials, which can increase the temperature for dehydration and avoid thermal decomposition of the polymer, and they cooperate with a dehydrant to make water in the system easier to remove; and the device has high operation flexibility and can adapt to the requirement of variability of a formulation of the silane-modified sealing material.
METHOD FOR PRODUCING A MODIFIER FOR PREPARING A COMPOSITE MATERIAL BASED ON A THERMOPLASTIC POLYMER
A method for producing a modifier for preparing a composite material based on a thermoplastic polymer where the thermoplastic polymer is mixed with a solvent and salts of alkali metals with the following ratio of components (wt. %): thermoplastic polymer—3-15, solvent—70-94, salts of alkali metals—3-15, until the polymer is fully dissolved, and then carbon nanotubes are added to the mixture in an amount up to 5 wt. % while stirring to produce a dispersion, then a coagulant is added to the dispersion under continuous stirring, the resulting dispersion is then filtered, and the filter cake is rinsed and dried up. The solvent is selected from the group of: alcohol, or N-methylpyrrolidone, or dimethylacetamide. The alkali metal salt is lithium chloride or calcium chloride. The carbon nanotubes are single-wall carbon nanotubes.
Method for removing moisture from polymer pellets for plastic injection and extrusion
The invention relates to a solution for reducing and removing moisture from plastic pellets by means of absorption and condensation, in which energy consumption is reduced and the process is simplified, making use of infrared wavelength efficiency, and comprising the following steps: 1. a supply phase using a dosing tank; 2. a distribution phase using a pellet levelling and dispensing device, a conveyor belt and a vibrating motor on the conveyor belt; 3. a moisture-removal phase using one or more infrared wave emitters disposed in parallel, a ventilated or cooled motor for a set of emitters, an air-recirculation passage for a set of emitters, an input temperature probe, an output temperature probe, and a moisture control probe; and 4. a discharge phase in which the material from which the moisture has been removed is discharged using a thermally-insulated collector tank.