Duct and process for producing the same
AssigneeToyota Boshoku Kabushiki Kaisha
InventorsKunihiro Yamaura, Kouichi Oda
Life of this patent
Estimating the term…
Abstract
An object of the present invention is to provide a duct having a simple structure and capable of suppressing occurrences of an intake noise and a dropping-out of an adsorbent, and to a process for producing the same capable of producing easily. The present duct (1) is one comprising a duct body (2) in tubular, and the duct body (2) is comprised of a nonwoven fabric in which an adsorbent (3) in at least one type among granular, powdery and fibrous is disposed as an intermediate layer. The duct body (2) is preferably composed of a first fiber layer (7) located on an inner circumferential side, a second fiber layer (8) located on an outer circumferential side, and the adsorbent (10) is disposed between the first fiber layer (7) and the second fiber layer (8).
Claims15
A duct comprising a duct body in tubular,
- wherein said duct body is comprised of a nonwoven fabric in which an adsorbent in at least one type among granular, powdery and fibrous is disposed as an intermediate layer,
- wherein said duct body comprises a first fiber layer that is located on an inner circumferential side of said duct body, a second fiber layer that is located on an outer circumferential side of said duct body, and said adsorbent that is disposed between said first fiber layer and said second fiber layer, and
- wherein a mass per unit area of a first fiber-integrated body comprising said first fiber layer is less than a mass per unit area of a second fiber-integrated body comprising said second fiber layer.
A process for producing a duct including a tubular shape, comprising successively:
- step (I) for obtaining a nonwoven fabric in which an adsorbent in at least one type among granular, powdery and fibrous is disposed as an intermediate layer, and
- step (II) for processing said nonwoven fabric to form a half-split molded article,
- wherein said step (I) comprises disposing an adsorbent and a second fiber-integrated body successively on a first fiber-integrated body, and bonding said first fiber-integrated body and said second fiber-integrated body,
- wherein a mass per unit area of said first fiber-integrated body is less than a mass per unit area of said second fiber-integrated body.
Dependencies are inferred from the claim text.