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Foamable thermoplastic resin particles and method for producing same

A thermoplastic resin and a technology for a manufacturing method are applied in the field of manufacturing thermoplastic resin foamed moldings, and achieve the effects of simple manufacturing equipment and processes and less fusion

Inactive Publication Date: 2012-10-17
SEKISUI KASEIHIN KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this Patent Document 4, regarding the temperature of the molten resin and the temperature of the mold, Example 1 only states that the temperature of the resin is "150°C in front of the mold", and there is no mention of the temperature of the mold.

Method used

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  • Foamable thermoplastic resin particles and method for producing same
  • Foamable thermoplastic resin particles and method for producing same
  • Foamable thermoplastic resin particles and method for producing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0099] (Manufacture of expandable polystyrene resin pellets)

[0100] exist figure 1 As shown in extruder 2, install the figure 2 and image 3 The shown granulation mold 1 composed of a mold base 11 and a mold main body 10 produces expandable polystyrene resin pellets. use figure 2 and image 3 The temperature measuring body 19 shown switches and controls all the cylindrical heaters 17 and the short heaters 18 to adjust the temperature of the mold main body 10 of the granulation mold 1 .

[0101] As the base resin, 0.3 parts by mass of talc fine powder was uniformly mixed in advance with 100 parts by mass of polystyrene resin (manufactured by TOYO STYRENE Co., Ltd., trade name "HRM-10N") with a tumble mixer. The mixture was supplied to a single-screw extruder with a diameter of 90 mm, and the resin was heated and melted. Thereafter, 6 parts by mass of isopentane as a foaming agent was injected in the middle of the extruder with respect to 100 parts by mass of the resi...

Embodiment 2

[0145]Except having set the resin temperature to 200 degreeC (195 degreeC in Example 1), it carried out similarly to Example 1, and produced the expandable resin particle, the pre-expanded particle, and the expanded molding.

Embodiment 3

[0147] Except that the resin temperature is 200°C (195°C in Example 1) and the mold temperature is 195°C (185°C in Example 1), the same operation as Example 1 is performed to produce expandable resin particles, pre-expanded Foam particles and foam moldings.

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Abstract

Disclosed is a method for producing foamable thermoplastic resin particles whereby foamable thermoplastic resin particles are obtained by the hot-cutting method while controlling the temperature (T1) of a resin containing a foaming agent in a granulation die and the temperature (T2) of the granulation die so as to satisfy the requirement T1>T2, and controlling the ratio (L1 / L2) of the flow rate (L1) of a cooling medium to the discharge rate (L2) of the foaming agent-containing resin, said resin being discharged from a nozzle, within a range of 100-200.

Description

technical field [0001] The present invention relates to a method for producing expandable thermoplastic resin particles using a thermal cutting method, a method for producing expanded thermoplastic resin particles, and a method for producing a thermoplastic resin foam molded article. [0002] This application claims the priority based on Japanese Patent Application No. 2009-271985 for which it applied to Japan on November 30, 2009, The content is taken in into this specification. Background technique [0003] Conventionally, technologies disclosed in Patent Documents 1 to 4 have been proposed as techniques for producing expandable thermoplastic resin particles by a thermal cutting method (also referred to as an underwater cutting method, an underwater thermal cutting method, etc.). [0004] In Patent Document 1, a method for producing a foamed styrene polymer having a molecular weight Mw exceeding 170,000 g / mole is disclosed, wherein a blowing agent-containing styrene polyme...

Claims

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Application Information

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IPC IPC(8): C08J9/18B29B9/06B29C48/04B29C48/05
CPCC08J2300/22B29C44/3461B29B9/065C08J9/16B29K2105/048B29C2793/0027B29C48/05B29C2948/92704B29C48/0022B29C48/345B29C48/911B29C2948/92904B29C2948/92971B29C48/04B29B7/582B29B7/826
Inventor 樽本裕之地海良辅
Owner SEKISUI KASEIHIN KOGYO KK
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