PROCESS FOR PRODUCING THERMOPLASTIC RESIN COMPOSITION AND PROCESS FOR PRODUCING MOLDED THERMOPLASTIC RESIN

• US 20110109013A1
• Filed: 10/07/2008
• Published: 05/12/2011
• Est. Priority Date: 10/26/2007
• Status: Abandoned Application

• Current Assignee: Toyota Boshoku Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Boshoku Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Hashiba, Masanori
• Application Number:
  US12/673,855
• Publication Number:
  US 20110109013A1
• Time in Patent Office: Days
• US Class Current: 264/299
• CPC Class Codes: B01F 27/2123 Shafts with both stirring means and feeding or discharging means
• CPC Class Codes: B29B 7/14 with screw or helix
• CPC Class Codes: B29B 7/16 with paddles or arms
• CPC Class Codes: B29B 7/283 measuring data of the driving system, e.g. torque, speed, power
• CPC Class Codes: B29B 7/286 measuring properties of the mixture, e.g. temperature, density B29B7/283 takes precedence
• CPC Class Codes: B29B 7/401 having a casing closely surrounding the rotor, e.g. with a plunger for feeding the material B29B7/407, B29B7/42 take precedence
• CPC Class Codes: B29B 7/823 Temperature control
• CPC Class Codes: B29B 7/92 Wood chips or wood fibres
• CPC Class Codes: B29B 9/06 in the form of filamentary material, e.g. combined with extrusion
• CPC Class Codes: B29B 9/08 by agglomerating smaller particles
• CPC Class Codes: B29B 9/12 characterised by structure or composition
• CPC Class Codes: B29B 9/14 fibre-reinforced
• CPC Class Codes: B29C 48/40 using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
• CPC Class Codes: B29C 48/465 using rollers
• CPC Class Codes: B29C 48/47 using discs, e.g. plasticising the moulding material by passing it between a fixed and a rotating disc that are coaxially arranged
• CPC Class Codes: B29C 48/625 characterised by the ratio of the threaded length of the screw to its outside diameter [L/D ratio]
• CPC Class Codes: B29K 2711/00 Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
• CPC Class Codes: C08H 8/00 Macromolecular compounds derived from lignocellulosic materials pretreatment thereof B27N
• CPC Class Codes: C08J 2323/12 Polypropene
• CPC Class Codes: C08J 2367/04 Polyesters derived from hydroxy carboxylic acids, e.g. lactones C08J2367/06 takes precedence
• CPC Class Codes: C08J 3/201 : Pre-melted polymers
• CPC Class Codes: C08J 5/045 : with vegetable or animal fibrous material
• CPC Class Codes: C08L 23/12 : Polypropene
• CPC Class Codes: C08L 67/04 : Polyesters derived from hydroxycarboxylic acids, e.g. lactones C08L67/06 takes precedence
• CPC Class Codes: C08L 97/02 : Lignocellulosic material, e.g. wood, straw or bagasse manufacture of articles made from lignocellulosic material by dry processes B27N

Abstract

The object of the present invention is to provide a method for producing a thermoplastic resin composition that contains a vegetable material in a large amount of 50% or more by weight and is capable of being pelletized so as to exhibit high fluidity, and to a method for producing a molded article of a thermoplastic resin. The present production method for the composition is one for producing a thermoplastic resin composition which comprises a vegetable material and a thermoplastic resin, and contains the vegetable material in an amount of 50% to 95% by weight based on 100% by weight of the vegetable material and the thermoplastic resin, and is characterized by comprising a mixing process for mixing the vegetable material such as kenaf core and kenaf fiber, and the thermoplastic resin such as polypropylene and polylactic acid using a mixer, and a pelletizing process for pressing the mixture obtained in the mixing process to form a pellet. In the present production method for the molded article, the thermoplastic resin composition is subjected to extrusion molding or injection molding to form a molded article.

Claims

1. A method for producing a thermoplastic resin composition which comprises a vegetable material and a thermoplastic resin, and contains said vegetable material in an amount of 50% to 95% by weight based on 100% by weight of said vegetable material and said thermoplastic resin, comprising:

a mixing process for mixing said vegetable material and said thermoplastic resin using a mixer, and

a pelletizing process for pressing the mixture obtained in said mixing process to form a pellet.

2. The method for producing a thermoplastic resin composition according to claim 1,

wherein said mixer has a mixing chamber for mixing and a mixing blade disposed in said mixing chamber, and

wherein said mixing process is a process in which the thermoplastic resin molten by rotation of said mixing blade and said vegetable material are mixed in said mixing chamber.

3. The method for producing a thermoplastic resin composition according to claim 1, wherein said vegetable material is a kenaf.

4. The method for producing a thermoplastic resin composition according to claim 1, wherein said thermoplastic resin is at least one of a polypropylene and a polylactic acid.

5. A method for producing a molded article of a thermoplastic resin, characterized in that said thermoplastic resin composition obtained by said method for production of a thermoplastic resin composition according to claim 1 is subjected to extrusion molding or injection molding to a molded article.