Dry analytical element and it's manufacturing method

• US 20020071784A1
• Filed: 10/15/2001
• Published: 06/13/2002
• Est. Priority Date: 10/16/2000
• Status: Abandoned Application

• Current Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Amano, Yoshikazu, Kawasaki, Kazuya
• Application Number:
  US09/978,142
• Publication Number:
  US 20020071784A1
• Time in Patent Office: Days
• US Class Current: 422/56
• CPC Class Codes: B01L 2200/12 Specific details about manufacturing devices
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 2300/0887 Laminated structure
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 2400/088 by specific surface properties
• CPC Class Codes: B01L 3/5023 with a sample being transported to, and subsequently stored in an absorbent for analysis
• CPC Class Codes: G01N 33/525 Multi-layer analytical elements

Abstract

A dry analytical element free from unevenness of concentration of a reagent supplied by coating on a spreading layer made of a polyester fabric or unevenness of coloring density is provided. Said dry analytical element consists of at least one water-permeable layer and a spreading layer made of polyester having a function of spreading liquid uniformly laminated on a water-impermeable transparent support in this order, characterized in that the surface of fiber composing the polyester spreading layer is coated with an organic solvent.

Claims

1. A dry analytical element comprising a water-impermeable transparent support, at least one water-permeable layer, and a spreading layer which is composed of polyester and has a function of spreading liquid uniformly, laminated in this order, characterized in that surface of fiber constituting said spreading layer is coated with an organic solvent.

2. Manufacturing method of a dry analytical element, characterized in that said method comprises a step of supplying an organic solvent on a spreading layer which is composed of polyester, has a function of spreading liquid uniformly, and is laminated on a water-permeable layer including at least one layer laminated on a water-impermeable transparent support, and a subsequent step of supplying a reagent solution on said spreading layer.