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A production device for preparing polylactic acid microporous plates

A production device and polylactic acid technology are applied in the field of production devices for preparing polylactic acid microporous sheets, which can solve the problems of food contamination, increased cost of foamed polylactic acid copolymer sheets, and the like, and achieve simplification of complexity and good resistance to mechanical deformation. and thermal stability, high safety in use

Active Publication Date: 2017-09-29
安徽京安润生物科技有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the use of the above additives, the cost of preparing foamed polylactic acid copolymer sheets will increase, and there is a possibility of food contamination when used for packaging food

Method used

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  • A production device for preparing polylactic acid microporous plates
  • A production device for preparing polylactic acid microporous plates
  • A production device for preparing polylactic acid microporous plates

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Experimental program
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Embodiment Construction

[0024] The present invention will be further described below in conjunction with accompanying drawing.

[0025] Such as figure 1 As shown, a production device 100 for preparing polylactic acid microporous plates includes a screw extruder 1, a gas nucleus initiator 2, a static mixer 3, a metering booster pump 4, a molding die 5, Air cooler 6, rotary cutter 7, tractor 8 and coiler 9.

[0026] In a specific embodiment of the present invention, as figure 2 As shown, the screw extruder 1 includes a screw 16 and a screw sleeve 15 covering the outside of the screw 16 . A material inlet 12 is provided upstream of the screw extruder 1, and a dynamic mixing head 19 is provided downstream. A blowing agent inlet 17 is provided on the wall of the screw sleeve 15 between the material inlet 12 and the dynamic mixing head 19 . Upstream of the material inlet 12 is a screw drive 11 . A plurality of heaters c are sheathed on the outer wall of the screw sleeve 15 , and a temperature sensor ...

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Abstract

The invention provides a production device for manufacturing polylactic acid porous plates. The production device comprises a screw extruder. The screw extruder comprises a screw and a screw sleeve arranged outside the screw in a sleeving manner. A material inlet is formed in the upstream of the screw extruder, and a dynamic mixing head is arranged at the downstream of the screw extruder. A foaming agent inlet is formed in the wall of the middle area of the portion, between the material inlet and the dynamic mixing head, of the screw sleeve. According to the production device for manufacturing polylactic acid porous plates, the foaming agent inlet not only can prevent gas from overflowing in the feeding direction of the screw, but also can reduce the gas intake pressure properly, so that foaming agents and polylactic acid melt are mixed evenly, and polylactic acid porous plates containing no additives are manufactured.

Description

technical field [0001] The invention relates to the field of material preparation, in particular to a production device for preparing polylactic acid microporous plates. Background technique [0002] Foam materials are widely used in various packaging fields in daily life. The volume to weight ratio of foamed materials is high, much higher than other non-foamed materials such as bottles and carton containers, making recycling of used foamed materials problematic. There is an urgent need to find a suitable recycling method to solve the above problems. The microporous foam products made of biodegradable polylactic acid completely solve the problems of "white pollution" and "high recycling cost". [0003] Polylactic acid microporous sheet is a degradable packaging material, especially for food packaging. Currently, several additives must be added to prepare foamed PLA sheets, for example, auxiliary agents for the foaming step. These additives are required to have foam and a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C47/00B29C47/08B29C47/14B29C47/70B29C47/90B29C48/305B29C48/90
CPCB29C48/0012B29C48/0022B29C48/25B29C48/30B29C48/305B29C48/70B29C48/90
Inventor 史佳林姚蔚明
Owner 安徽京安润生物科技有限责任公司