摘要:
Expandable polylactic acid resin particles including (a) a base resin containing a polylactic acid resin having at least 50 mol % of lactic acid monomer component units, (b) a polyolefin wax in an amount of 0.0001 to 1 part by weight per 100 parts by weight of the base resin, and (c) a blowing agent in an amount of 1 to 30% by weight based on the weight of the resin particles. The expandable resin particles can give expanded beads having an average cell diameter of 10 to 500 μm. The expanded beads can give in-mold foam moldings.
摘要:
A method of producing a polystyrene-based resin foam sheet, including kneading a polystyrene-based resin and a physical blowing agent with heating in an extruder to obtain a foamable resin composition, and extruding the foamable composition through a die, wherein the physical blowing agent comprises 60 to 95 mole % of a first blowing agent selected from isobutane, n-pentane, isopentane and mixtures thereof and 5 to 40 mole % of a second blowing agent selected from water, carbon dioxide, ethers having a boiling point of 140° C. or lower, dialkylcarbonates having a boiling point of 140° C. or lower and mixtures thereof, and wherein the total mole % of the physical blowing agent is equal to 100 mole %.
摘要:
A magnetic recording head, a resistor, a capacitor and another resistor are connected in series to form a bridge circuit arranged to satisfy the condition Ra.multidot.Rb=L/C, wherein Ra and Rb represent the resistance values of the resistors, respectively, L represents the inductance value of the magnetic recording head, and C represents the capacitance value of the capacitor. A recording signal is applied across a first pair of opposite junctions of the bridge circuit, and an AC biasing signal to be used in recording the recording signal is applied across a second pair of opposite junctions of this bridge circuit.
摘要翻译:磁记录头,电阻器,电容器和另一个电阻器串联连接以形成满足条件RaxRb = L / C的桥式电路,其中Ra和Rb分别代表电阻器的电阻值,L代表 磁记录头的电感值,C表示电容器的电容值。 记录信号施加在桥接电路的第一对相对接点上,并且用于记录记录信号的AC偏置信号被施加在该桥接电路的第二对相对接点上。