Method and device for preparing biaxially oriented polystyrene (Bops) sheet material

A polystyrene sheet, biaxially stretched technology, applied in the field of preparation of biaxially stretched polystyrene sheets, can solve the problems of many equipment, long process, complicated process, etc., and achieve simple process, short process, and packaging saving Effects of fees and shipping costs

Inactive Publication Date: 2014-01-08
魏明吉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Solve the problems of long existing process, many equipments and complicated process

Method used

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  • Method and device for preparing biaxially oriented polystyrene (Bops) sheet material
  • Method and device for preparing biaxially oriented polystyrene (Bops) sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: a kind of preparation method of biaxially stretched polystyrene sheet, it comprises the following steps:

[0020] (1) Synthesis of polystyrene resin; synthesis reaction kettle, temperature: 160°C, vacuum degree: 0.01-0.1Mpa; (2) Devolatilization device: temperature: 240°C, vacuum degree: 0.01-0.1Mpa; (3) melting Volume metering gear pump, temperature 230°C, pressure 3Mpa; (4) cast sheet; sheet die, temperature 230°C, pressure: 3Mp; (5) longitudinal stretching: temperature 145°C, multiple: 3.5 times; (6) Transverse stretching: temperature is 145°C, stretching ratio: 3.5 times.

[0021] The following steps are also included: (7) coating: (8) drying: the temperature is 90-120°C; (9) winding: (10) cutting: according to the standard.

Embodiment 2

[0022] Embodiment 2: a kind of preparation method of biaxially stretched polystyrene sheet comprises the following steps:

[0023] (1) Synthesis of polystyrene resin; synthetic reaction kettle, temperature: 140°C, vacuum degree: 0.01-0.1Mpa; (2) devolatilization device: temperature 220°C, vacuum degree: 0.01-0.1Mpa; (3) melting Volume metering gear pump, temperature: 190°C, pressure: 23Mpa; (4) cast sheet; sheet die, temperature: 230°C; pressure: 23Mpa; (5) longitudinal stretching: temperature: 110°C, stretching ratio: 1.5 times; (6) Transverse stretching: temperature is 110°C, stretching ratio: 1.5 times.

[0024] The following steps are also included: (7) coating: (8) drying: the temperature is 90-120°C; (9) winding: (10) cutting: according to the standard.

Embodiment 3

[0025] Example 3: (1) polystyrene resin synthesis; synthetic reaction kettle, temperature: 160°C, vacuum: 0.01-0.1Mpa; (2) devolatilization: temperature: 220°C, vacuum: 0.01-0.1Mpa; ( 3) Melt delivery metering pump, temperature 210°C, pressure 15Mpa (4) cast sheet; sheet die, temperature 130°C; pressure: 12Mpa; (5) Longitudinal stretching: temperature 120°C, stretch Multiplier: 3 times; (6) Transverse stretching: temperature is 120°C, stretching ratio: 2.5 times.

[0026] The following steps are also included: (7) coating: (8) drying: the temperature is 90-120°C; (9) winding: (10) cutting: according to the standard.

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Abstract

The invention relates to a method and a device for preparing a biaxially oriented polystyrene (Bops) sheet material. The method comprises polystyrene resin synthesis, piece casting, longitudinal drawing and transverse drawing. The invention provides the device for preparing the Bops sheet material. The device is characterized in that a material outlet of a synthesis reaction kettle passes through a melt delivery pump and is connected to a material inlet of a devolatilization device by a pipe; a material outlet of the devolatilization device passes through a melt delivery pump and is connected to a material inlet of a melt metering gear pump by a pipe; the melt metering gear pump is connected to a sheet material die head by a pipe; and the sheet material die head is orderly connected to a longitudinal drawing device and a transverse drawing device. The method improves the traditional technology and avoids the original extrusion melting process so that a high-price and high-energy consumption melt extruder is avoided. Compared with the original BOPS production technology, the method provided by the invention saves energy by 40-50%.

Description

technical field [0001] The invention relates to a preparation method and device for a biaxially stretched polystyrene sheet. Background technique [0002] Polystyrene sheet is an environmentally friendly product, which is widely used in the packaging of medicines and foods. Due to its long process flow and complicated equipment, the cost has always been relatively high, which limits the current promotion and use. [0003] The traditional biaxially oriented polystyrene sheet (abbreviated as Bops in English) production process route see figure 1 For: Styrene (SM) enters the reactor to polymerize into polystyrene (GPPS) melt, then passes through the melt delivery pump, discharges the material through a linear die, cuts the strip material into pellets, packs the pellets, and transports them to downstream processing The BOPS production plant of the enterprise enters the extruder through the pellet feeding system to be melted and extruded, flows out through the sheet die head, an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/14B29C55/00C08F112/08C08F6/00
Inventor 魏明吉
Owner 魏明吉
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