A kind of technique for preparing pencil by polystyrene micro-foaming

A polystyrene, micro-foaming technology, used in the production of pencil leads, non-moving pencils, bulk chemicals, etc., can solve problems such as pollution of toxic and harmful substances

Active Publication Date: 2021-04-23
安徽得亿文教用品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to produce penholders of different colors, wooden pencils need to use paint to spray their outer surfaces, which will inevitably cause pollution of toxic and harmful substances, and it is undoubtedly a big problem for penholders that are in close contact with the human body. disadvantages

Method used

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  • A kind of technique for preparing pencil by polystyrene micro-foaming
  • A kind of technique for preparing pencil by polystyrene micro-foaming
  • A kind of technique for preparing pencil by polystyrene micro-foaming

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of technology that polystyrene microfoam prepares pencil, comprises the following steps:

[0031] (1) Refill granulation: weigh 80kg of polystyrene, 15kg of talcum powder, 15kg of thermoplastic elastomer SBS, 80kg of graphite, 0.2kg of zinc stearate, 1.3kg of calcium stearate, and 10kg of monoglyceride stearate After mixing, stir evenly, and then add it to the extruder barrel preheated to 220°C for melting and plasticization. Under the pressure of 120MPa, quickly inject supercritical fluid carbon dioxide into the extruder barrel. In the plastic melt, through the shearing of the screw, the supercritical fluid carbon dioxide is dispersed and homogenized, fully dissolved with the polymer melt to form a single-phase melt, and the pressure at this time is maintained. After saturation and equilibrium, it is extruded and cooled. , made into refill particles;

[0032] (2) Pen skin granulation: weigh 90kg of polystyrene, 27kg of thermoplastic elastomer SBS, 13kg of pigme...

Embodiment 2

[0042] A kind of technology that polystyrene microfoam prepares pencil, comprises the following steps:

[0043] (1) Refill granulation: weigh 80kg of polystyrene, 15kg of talcum powder, 15kg of thermoplastic elastomer SBS, 80kg of graphite, 0.2kg of zinc stearate, 1.3kg of calcium stearate, and 10kg of monoglyceride stearate After mixing, stir evenly, and then add it to the extruder barrel preheated to 220°C for melting and plasticization. Under the pressure of 120MPa, quickly inject supercritical fluid carbon dioxide into the extruder barrel. In the plastic melt, through the shearing of the screw, the supercritical fluid carbon dioxide is dispersed and homogenized, fully dissolved with the polymer melt to form a single-phase melt, and the pressure at this time is maintained. After saturation and equilibrium, it is extruded and cooled. , made into refill particles;

[0044] (2) Pen skin granulation: weigh 90kg of polystyrene, 27kg of thermoplastic elastomer SBS, 13kg of pigme...

Embodiment 3

[0055] A kind of technology that polystyrene microfoam prepares pencil, comprises the following steps:

[0056] (1) Refill granulation: weigh 80kg of polystyrene, 15kg of talcum powder, 15kg of thermoplastic elastomer SBS, 80kg of graphite, 0.2kg of zinc stearate, 1.3kg of calcium stearate, and 10kg of monoglyceride stearate After mixing, stir evenly, and then add it to the extruder barrel preheated to 220°C for melting and plasticization. Under the pressure of 120MPa, quickly inject supercritical fluid carbon dioxide into the extruder barrel. In the plastic melt, through the shearing of the screw, the supercritical fluid carbon dioxide is dispersed and homogenized, fully dissolved with the polymer melt to form a single-phase melt, and the pressure at this time is maintained. After saturation and equilibrium, it is extruded and cooled. , made into refill particles;

[0057] (2) Pen skin granulation: weigh 90kg of polystyrene, 27kg of thermoplastic elastomer SBS, 13kg of pigme...

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Abstract

The invention discloses a technique for preparing a pencil by polystyrene micro-foaming, and relates to the technical field of pencil manufacturing and processing. The preparation process comprises the following steps: (1) granulation of the pen core; (2) granulation of the pen skin; (3) Pen barrel granulation; (4) wire drawing; (5) light cutting; (6) assembling rubber head; (7) trademark printing; (8) sharpening; (9) cleaning; (10) packaging. The technology proposed by the present invention utilizes the micro-foaming technology, so that the cycle period of making pencils is short, the cost is reduced, and the operation is simple and convenient. In addition, it saves a lot of high-quality wood, reasonably and effectively protects the national forest resources, and also protects the ecological environment, which is of great significance to my country's environmental protection.

Description

Technical field: [0001] The invention relates to the technical field of pencil manufacturing and processing, in particular to a technique for preparing pencils by microfoaming polystyrene. Background technique: [0002] The micro-foaming process refers to the injection of supercritical fluid into the cylinder in the injection molding cycle in the field of plastic production and processing to create a large number of uniform micron-sized closed cells in the plastic. The micro-foaming injection molding process is an innovative precision injection molding technology, which breaks through many limitations of traditional injection molding, can significantly reduce the weight of the part, shorten the molding cycle, and greatly improve the warping deformation and dimensional stability of the part sex. Especially in the production of high-quality precision products, the micro-foaming injection molding process has great advantages. [0003] Polystyrene is colorless and transparent,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B43K19/02
CPCB43K19/16B43K19/18C08J9/122C08J2203/06C08J2203/08C08J2325/06C08J2453/02C08K3/34C08K5/098C08K5/103C08K13/02C09D13/00Y02P20/54
Inventor 张育玮张枫杨勇王达传
Owner 安徽得亿文教用品有限公司
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