Abstract:
PROBLEM TO BE SOLVED: To provide a thermoplastic resin pellet that is excellent in oxygen absorbing performance and is preferably used as a pellet for forming an oxygen-absorbing resin articles.SOLUTION: A thermoplastic resin pellet contains a polyethylene resin as a thermoplastic resin (A), an organic salt of transition metal as an oxidation catalyst (B) which is not carried by a carrier and a styrenic resin as a trigger resin (C). A value of an area ratio Ic/Im is larger by 0.01 or more in the pellet than on a surface of pellet, where Ic is a peak area around 1715 cmand Im is a peak area around 1470 cmin IR spectrum measured by using a Fourier transform infrared spectrophotometer (FTIR) provided with an ATR crystal plate made of diamond of the pellet.
Abstract:
PROBLEM TO BE SOLVED: To provide polymer composites and a method for producing the polymer composites.SOLUTION: A set of microcapsules containing a phase change material is mixed with a dispersing polymer material to prepare a first blend. The dispersing polymer material has latent heat of 40 J/g at minimum and a transition temperature in a range of 0°C to 50°C. The first blend is processed to prepare a polymer composite. The polymer composite can be made into various forms such as a pellet, a fiber, a flake, a sheet, a film, a rod and the like. The polymer composite can be used as it is and can be incorporated into various articles in which heat adjustment characteristics are requested.
Abstract:
PROBLEM TO BE SOLVED: To provide a liquid crystalline polyester resin composition capable of obtaining a molded article having high snap fitting property and high self-tapping property.SOLUTION: The liquid crystalline polyester resin composition includes 100 pts.wt. of a liquid crystalline polyester resin comprising respective residues composed of hydroxybenzoic acid, 4,4'-dihydroxybiphenyl, hydroquinone, terephthalic acid and isophthalic acid, and 10-100 pts.wt. of a glass fiber. The weight-average fiber length (Mw) of the glass fiber is 200-500 μm, and the glass fiber having the fiber length of ≥1,500 μm accounts for 0.1-5.0 wt.% of the whole glass fiber.
Abstract:
In accordance with the present invention there is provided a method for making a highly radiopaque polyolefin compound, wherein the radiopaque material in said compound is substantially uniformly dispersed and held within a polymer matrix. During the method one first heats an amount of polyolefin, preferably low density polyethylene, to at least its melting temperature. The amount of polyolefin is equal to at least 10% by weight of the compound. Then an amount of radiopaque metal powder is added to the polyolefin. The amount of radiopaque metal is equal to up to 90% by weight of the compound. The metal powder is preferably tantalum, tungsten, gold or platinum. Thereafter, an amount of a dispersing agent is added to the polyolefin to form a mixture. The amount of dispersing agent is equal to at least 0.2% by weight of the compound. The dispersing agent is preferably zinc stearate, aluminum stearate or calcium stearate. Lastly, the mixture is mixed and cooled below its melting temperature to form the compound.