| abstract |
In a method and apparatus for forming a bonded web at least partially composed of polyester, the first material web and the second material web are arranged in opposing relationship along at least the portions to be joined of the first and second material webs. . At least one of the first and second material webs is at least partially composed of polyester. The opposing web is transported in the machine direction to a nip of a coupling device consisting of a first coupling member and a second coupling member which form a nip therebetween for passing the opposing first and second material webs in the machine direction. In the nip, the web is mechanically coupled in the nip while shear force is generally applied to the web in the machine direction and shear force is applied to the web. n n Polyester, mechanical coupling device of material web, ultrasonic bonding |