摘要:
The present invention relates to a sheet or board like multiple layers laminated polyolefin foam having a plurality of polyolefin layers laminated on at least one side of a polyolefin foam by a coextrusion method. More specifically, the present invention relates to said multiple layers laminated polyolefin foam, wherein the thickness of the outermost layer constituting the plurality of polyolefin layers is 5 to 80 μm, and the density d (g/L) of the polyolefin foam, the melt flow rate X (g/10 min) of the polyolefin constituting the innermost layer among the plurality of polyolefin layers, and the thickness Y (μm) of the innermost layer of the multiple polyolefin layers satisfy the following relationships (1) to (4). Y≦0.29dX (1) 5≦X≦40 (2) 70≦Y≦300 (3) 100≦d≦300 (4)
摘要:
The present invention provides a speaker unit comprising a diaphragm of 0.5 to 10 mm thick aromatic polycarbonate with a density of 0.03 to 0.6 g/cm3, and a mechanism for driving the diaphragm. The aromatic polycarbonate used for the diaphragm is preferably derived from bisphenol with a viscosity average molecular weight of 25,000 to 70,000. The invention further provides a speaker system comprising such a speaker unit attached to a cabinet and a method for manufacturing the speaker diaphragm.
摘要翻译:本发明提供一种扬声器单元,其包括密度为0.03至0.6g / cm 3的0.5至10mm厚的芳族聚碳酸酯的隔膜和用于驱动隔膜的机构。 用于隔膜的芳族聚碳酸酯优选衍生自粘均分子量为25,000至70,000的双酚。 本发明还提供一种扬声器系统,其包括附接到机壳的扬声器单元和用于制造扬声器振膜的方法。
摘要:
A quinuclidine derivative represented by the following general formula (I), a pharmaceutically acceptable salt thereof, a hydrate thereof or a solvate thereof, which has strong squalene synthase inhibiting activity and is useful as a cholesterol lowering agent without causing side effects. ##STR1## (Symbols in the formula represent the following meanings; R.sub.1 : a hydrogen atom, a halogen atom or a lower alkyl group, R.sub.2 : a hydrogen atom, a hydroxyl group or a lower alkoxy group, . . : a single bond or a double bond, with the proviso that R.sub.2 does not exist when . . . is a double bond, X and Y: the same or different from each other and each represents a bond, an oxygen atom (--O--), a carbonyl group (--CO--), a group represented by the formula --S(O).sub.p -- or a group represented by the formula --NR.sub.3 --, p: 0, 1 or 2, R.sub.3 : a hydrogen atom or a lower alkyl group which may have a substituent, A: a saturated or unsaturated lower alkylene group, a group of the formula --(CH.sub.2).sub.m Z(CH.sub.2).sub.n -- or a group of the formula --(CH.sub.2).sub.m Z(CH.sub.2).sub.n CR.sub.4 =, Z: an oxygen atom (--O--), a group of the formula --S(O).sub.q --, a carbonyl group (--CO--) or a group of the formula --NR.sub.5 --, R.sub.4 : a hydrogen atom, a halogen atom or a lower alkyl group, R.sub.5 : a hydrogen atom or a lower alkyl group, m and n: the same or different from each other and each is 0 or an integer of 1 to 5, m+n: an integer of 1 to 5 q: 0, 1 or 2, with the proviso that, when either one of X and Y is a bond, A is a group represented by the formula --(CH.sub.2).sub.m Z(CH.sub.2).sub.n CR.sub.4 =.)