A laser-welded body includes at least three of resin members, which contain a thermoplastic resin including: a first resin member which is a laser-irradiated subject, has an absorbance a.sub.1 of 0.01 to 0.12; a second resin member which has an absorbance a.sub.2 of 0.1 to 0.9 and includes a butted part where ends of one or more resin members are brought into contact with each other; and a third resin member which has an absorbance a.sub.3 of 0.2 to 3.8, and the absorbances a.sub.2, a.sub.3 exhibited by the second resin member and the third resin member are attributed to the inclusion of nigrosine as a laser beam absorbent therein, and the resin members are overlapped in the above mentioned to form contacted parts at these interfaces, at least a part of the butted part and/or the contacted parts are laser-welded.

A laser-welded body includes at least three of resin members, which contain a thermoplastic resin including: a first resin member which is a laser-irradiated subject, has an absorbance a.sub.1 of 0.01 to 0.12; a second resin member which has an absorbance a.sub.2 of 0.1 to 0.9 and includes a butted part where ends of one or more resin members are brought into contact with each other; and a third resin member which has an absorbance a.sub.3 of 0.2 to 3.8, and the absorbances a.sub.2, a.sub.3 exhibited by the second resin member and the third resin member are attributed to the inclusion of nigrosine as a laser beam absorbent therein, and the resin members are overlapped in the above mentioned to form contacted parts at these interfaces, at least a part of the butted part and/or the contacted parts are laser-welded.

A copolymer having the structure (I) wherein Q.sup.1, Q.sup.2, Q.sup.3, Q.sup.4, m, and n are defined herein. The copolymer can be formed by oxidative copolymerization of 2,4,6-trimethyIresorcinoI with a monohydric phenol. Also describes are a composition comprising the copolymer and a solvent, and a composition comprising the copolymer and a thermosetting resin.

##STR00001##

Provided are resin foam particles that enable shaping of a sound absorbing member having excellent sound absorption performance through a resin foam shaped product. Also provided is a laminate that includes a resin foam shaped product as a base material and with which high sound absorption performance can be obtained even when the laminate is a thin material. The resin foam particles contain a resin and have a recessed external part. A ratio .sub.0/.sub.1 of density of the resin .sub.0 and true density .sub.1 of the resin foam particles is 2 to 20, and a ratio .sub.1/.sub.2 of true density .sub.1 of the resin foam particles and bulk density .sub.2 of the resin foam particles is 1.5 to 4.0.

The invention concerns a composite article, such as a mold part or an extrusion die, made of a composition comprising at least one polyarylether ketone and at least one thermally conductive filler, wherein the composite article has a thermal conductivity of at least 0.5 W/mK. The invention also concerns a composition and uses thereof.

A bonded body formed by a vibration welding of a first member and a second member. The first member includes a first base portion extending along an edge on the second member side, and a first welded portion which protrudes from the first base portion toward the second member. The second member includes a second base portion extending along an edge on the first member side and disposed to face the first base portion, and a second welded portion protruding from the second base portion toward the first member side, and a distal end of which is vibration welded to the distal end of the first welded portion. The first member has a rib for covering the first welded portion and the second welded portion from the side, and the rib is formed so as to protrude from the first base portion toward the second member side at a position separated from the first welded portion.

A bonded body formed by a vibration welding of a first member and a second member. The first member includes a first base portion extending along an edge on the second member side, and a first welded portion which protrudes from the first base portion toward the second member. The second member includes a second base portion extending along an edge on the first member side and disposed to face the first base portion, and a second welded portion protruding from the second base portion toward the first member side, and a distal end of which is vibration welded to the distal end of the first welded portion. The first member has a rib for covering the first welded portion and the second welded portion from the side, and the rib is formed so as to protrude from the first base portion toward the second member side at a position separated from the first welded portion.

A bonded body is formed of a first member and a second member. The first member has a first base portion and a first welded portion which protrudes from the first base portion toward the second member side. The second member has a second base portion and a second welded portion which protrudes from the second base portion toward the first member side. In a first region of the joint portion, a first rib formed so as to project from the first base portion toward the second member side covers the first welded portion and the second welded portion from the side. In a second region different from the first region, a second rib formed so as to project from the second base portion toward the first member side covers the first welded portion and the second welded portion from the side.

A bonded body is formed of a first member and a second member. The first member has a first base portion and a first welded portion which protrudes from the first base portion toward the second member side. The second member has a second base portion and a second welded portion which protrudes from the second base portion toward the first member side. In a first region of the joint portion, a first rib formed so as to project from the first base portion toward the second member side covers the first welded portion and the second welded portion from the side. In a second region different from the first region, a second rib formed so as to project from the second base portion toward the first member side covers the first welded portion and the second welded portion from the side.

The present invention relates to a method for manufacturing a flexible skin which has at least one insert adhered thereto. In a first step, the skin is molded on a mold surface. In order to adhere the insert to the skin, an opening is first made in the skin giving access to the back face of the insert. The insert is positioned with its back face against the front face of the skin and an adhering layer is provided which is adhesively connected to the back face of the skin layer which surrounds the opening in the skin layer and, through this opening, to the back face of the insert. The adhering layer is preferably produced by applying a layer of a hardenable material, in particular a curable polyurethane composition. Since the back face of the insert engages the front side of the skin penetration of hardenable material to the front face of the insert is avoided.