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

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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 stat

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

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Example Embodiment

[0098] [Example 1]

[0099] (Manufacture of expandable polystyrene resin particles)

[0100] in figure 1 Extruder 2 shown, install figure 2 and image 3 The illustrated pelletizing mold 1 composed of the mold base 11 and the mold main body 10 manufactures expandable polystyrene resin pellets. use figure 2 and image 3 The temperature measuring body 19 shown performs on-off control of all the cylindrical heaters 17 and short heaters 18, and performs temperature adjustment of the mold main body 10 of the pelletizing mold 1.

[0101] As the base resin, 0.3 parts by mass of fine talc powder was uniformly mixed in 100 parts by mass of polystyrene resin (manufactured by TOYO STYRENE Co., Ltd, trade name "HRM-10N") with a tumble mixer in advance The mixture was fed into a single-screw extruder with a diameter of 90 mm to heat and melt the resin. After that, 6 parts by mass of isopentane as a foaming agent relative to 100 parts by mass of the resin was press-fitted in the middle of the ...

Example Embodiment

[0144] [Example 2]

[0145] Except that the resin temperature was set to 200°C (195°C in Example 1), the same operations as in Example 1 were carried out to produce expandable resin particles, pre-expanded particles, and foamed molded articles.

Example Embodiment

[0146] [Example 3]

[0147] Except that the resin temperature was set to 200°C (195°C in Example 1) and the mold temperature was set to 195°C (185°C in Example 1), the same procedure as in Example 1 was carried out to produce foamable resin particles and pre-expanded resin particles. 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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