Microproduct, medical microproduct, microwell array chip, microwell position detection plate, and micro resin pipette tip using the microproduct

• US 20060127282A1
• Filed: 11/10/2005
• Published: 06/15/2006
• Est. Priority Date: 12/19/2003
• Status: Abandoned Application

• Current Assignee: Nagaoka University of Technology, Richell, TOYAMA PREFECTURE
• Original Assignee: Nagaoka University of Technology, Richell, TOYAMA PREFECTURE
• Inventors: Fujiki, Satoshi, Yamashita, Kazuyuki, Onaga, Takashi, Morimoto, Hideki, Obata, Tutomu, Suzuki, Masayasu
• Application Number:
  US11/272,525
• Publication Number:
  US 20060127282A1
• Time in Patent Office: Days
• US Class Current: 422/100
• CPC Class Codes: B29C 2045/0094 injection moulding of small-sized articles, e.g. microarticles, ultra thin articles
• CPC Class Codes: B29C 45/0001 characterised by the choice of material
• CPC Class Codes: C08L 23/10 Homopolymers or copolymers of propene
• CPC Class Codes: C08L 23/12 Polypropene
• CPC Class Codes: C08L 23/14 Copolymers of propene C08L23/16 takes precedence
• CPC Class Codes: C08L 2666/06 Homopolymers or copolymers of unsaturated hydrocarbons; Derivatives thereof
• CPC Class Codes: C08L 2666/24 Graft or block copolymers according to groups C08L51/00, C08L53/00 or C08L55/02; Derivatives thereof
• CPC Class Codes: C08L 53/025 modified

Abstract

A microproduct includes a resin composition including a polypropylene-based resin and a hydrogenated derivative of a block copolymer shown by the general formula “X-Y”. The microproduct has micromachined features of a stamper precisely transferred by injection molding and a molded surface has a plurality of recesses and/or protrusions. In this case, X represents a polymer block immiscible with the polypropylene-based resin, and Y represents an elastomeric polymer block of a conjugated diene.

Claims

1. A microproduct comprising a resin composition including a polypropylene-based resin and a hydrogenated derivative of a block copolymer shown by the general formula “

X-Y”

(X represents a polymer block immiscible with the polypropylene-based resin, and Y represents an elastomeric polymer block of a conjugated diene), and having micromachined features of a stamper precisely transferred by injection molding so that a molded surface has a plurality of recesses and/or protrusions with a depth of the recess or a length of the protrusion being 0.3 to 200 μ

m and a width of an opening of the recess, a width of the protrusion, or a circumscribed or inscribed circle diameter of the recess or the protrusion being 0.3 to 100 μ

m.

2. The microproduct as defined in claim 1,

wherein the polymer block X of the hydrogenated derivative of the resin composition is polystyrene, and the polymer block Y before hydrogenation is at least one of 1,2-polyisoprene, 3,4-polyisoprene, and 1,4-polyisoprene.

3. The microproduct as defined in claim 1,

wherein the polymer block X of the hydrogenated derivative of the resin composition is polystyrene, and the polymer block Y before hydrogenation is at least one of 1,2-polybutadiene and 1,4-polybutadiene.

4. The microproduct as defined in claim 1,

wherein the resin composition includes a nucleating agent for the polypropylene-based resin.

5. The microproduct as defined in claim 1, wherein the stamper is a silicon stamper.

6. A medical microproduct comprising the microproduct as defined in claim 1.

7. A microwell array chip comprising the microproduct as defined in claim 1.

8. A microwell position detection plate comprising the microwell array chip as defined in claim 7 and a transparent plate, a back surface of the microwell array chip being bonded to a front surface of the transparent plate by using an adhesive.

9. A micro resin pipette tip comprising a resin composition including a polypropylene-based resin and a hydrogenated derivative of a block copolymer shown by the general formula “

X-Y”

(X represents a polymer block immiscible with the polypropylene-based resin, and Y represents an elastomeric polymer block of a conjugated diene), and capable of sampling or dispensing a biological substance, an organic substance, or an inorganic substance.

10. The micro resin pipette tip as defined in claim 9,

wherein the polymer block X of the hydrogenated derivative of the resin composition is polystyrene, and the polymer block Y before hydrogenation is at least one of 1,2-polyisoprene, 3,4-polyisoprene, and 1,4-polyisoprene.

11. The micro resin pipette tip as defined in claim 9,

wherein the polymer block X of the hydrogenated derivative of the resin composition is polystyrene, and the polymer block Y before hydrogenation is at least one of 1,2-polybutadiene and 1,4-polybutadiene.

12. The micro resin pipette tip as defined in claim 9, wherein the biological substance is at least one of a cell, protein, nucleic acid, cellular tissue, and bacterium.

13. The micro resin pipette tip as defined in claim 9, having a volume of 10 picoliters to 90 nanoliters.

14. The micro resin pipette tip as defined in claim 9, wherein an open end of the micro resin pipette tip has an inner diameter of 1 to 90 μ

m.

15. The micro resin pipette tip as defined in claim 9, including a nozzle hole at a center,

wherein an end portion of the micro resin pipette tip has a shape of a conical or pyramidal pipe.