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High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof

A polystyrene sheet material and manufacturing method technology, applied in the directions of packaging, wrapping paper, transportation and packaging, etc., can solve the problems of unable to meet packaging requirements, poor anti-fog performance, etc., to improve anti-fog performance, meet packaging requirements, The effect of broad market prospects

Inactive Publication Date: 2014-08-27
WINKO PLASTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the anti-fog performance of ordinary polystyrene materials is poor and cannot meet the packaging needs of special foods such as higher temperatures. Therefore, it is urgent to improve its production process

Method used

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  • High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof
  • High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof
  • High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof

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Embodiment Construction

[0026] The high anti-fog polystyrene sheet suitable for special food packaging provided by the invention has the following composition (%): GPPS (general-purpose polystyrene) 90-95%; K resin 5-10%.

[0027] In the present invention, the processing technology of polystyrene sheet is as figure 1 shown, including:

[0028] 1. First weigh GPPS and K resin according to the weight ratio, and mix them evenly; put the mixed raw materials into the hopper, and blow them to the dryer for drying treatment through the Roots blower;

[0029] 2. The mixture is drawn from the dryer by a vacuum pump and sent to the lower hopper of the extruder;

[0030] 3. The above mixture is melted and extruded on the extruder, and the melting temperature is controlled between 180°C and 250°C;

[0031] 4. After the impurities are filtered out by the filter, the molten material is sent to the die for extrusion and cast into a thick sheet. The temperature in the die is controlled between 200°C and 250°C;

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Abstract

The invention discloses a high-antifogging polystyrene sheet suitable for special food packaging and a manufacturing method thereof. The high-antifogging polystyrene sheet is prepared from the following raw materials in percentage by weight: 90-95% of general-grade polystyrene, and 5-10% of resin K. The manufacturing method comprises the following steps: mixing the raw materials in proportion; carrying out melt extrusion on the obtained mixture by an extruder; feeding a melt into a die head, so that the melt is cast into a thick sheet; sequentially carrying out longitudinal and transverse stretching and sizing on the thick sheet, so that a thin sheet is obtained; carrying out edge trimming, thickness measuring and aureoling on the thin sheet; spraying an antifogging agent on one surface of the thin sheet, wherein the content of the antifogging agent is 3-6% after being diluted by water, and the spraying amount is 3.0-4.3 ml / m<2>; and rolling, aging and slitting the thin sheet. According to the invention, in the process of sheet production, a reasonable amount of a diluted antifogging agent is sprayed on the surface of a sheet, so that the antifogging performance of the sheet is greatly improved, the antifogging grade can be as high as 5-grade, the sheet also can be completely transparent and has no formed fog after packaging food, therefore, the sheet meets the packaging requirements of special foods, and has a broad market prospect.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a high anti-fog polystyrene sheet suitable for special food packaging and a manufacturing method thereof, and an environmentally friendly biaxially stretched polystyrene sheet that can be used for printing and a manufacturing method thereof. Background technique [0002] Biaxially oriented polystyrene film is a new type of green packaging material developed in recent years. Compared with traditionally used polyethylene and polyvinyl chloride films, it has high strength, high rigidity, non-toxicity, easy degradation, and easy coloring. , good gloss and transparency, easy processing and other advantages, it is widely used in the packaging of various items such as handicrafts, daily necessities, metal products, especially food. At present, the amount of biaxially oriented polystyrene film in developed countries such as the United States, Canada, and Japan has accounted for...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L25/06C08L53/02B32B33/00B65D65/38
Inventor 李康林国宏纪新川丁秀芳
Owner WINKO PLASTICS
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