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Polylactic acid sheet material and production equipment thereof

A polylactic acid and polylactic acid resin technology, applied in the field of manufacturing and plasticizing molding materials, can solve the problems that polylactic acid sheets are not easy to form and process, and achieve the effect of excellent processing performance

Inactive Publication Date: 2008-03-05
陈津生
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] At the same time, in order to solve the problem that the polylactic acid sheet is not easy to form and process in the known technology, a barrier-type screw with a convex ring and a cooling roller with more than 3 cooling water tanks in the jacket are provided.

Method used

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  • Polylactic acid sheet material and production equipment thereof
  • Polylactic acid sheet material and production equipment thereof
  • Polylactic acid sheet material and production equipment thereof

Examples

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Embodiment

[0039] Figure 2 is a schematic diagram of the screw. Fig. 3 is a sectional view of Fig. 2B-B. As shown in Fig. 2 and Fig. 3, the screw rod 11 is a barrier type screw rod, and in front of the barrier type screw rod 11 thread, that is, on the left side of the thread in Fig. The axis forms a certain angle, and between the barrier section 12 and the top of the screw, there are three radially parallel grooves 15 that are equally spaced toward the center of the screw, and the three protruding rings 14 beside the groove 15 are all 10 mm wide. 5 mm high, the outer peripheral surface of the convex ring 14 is formed with 12 evenly distributed shallow grooves 14a that are sunken into the center of the convex ring, and the center line of the shallow grooves 14a forms a certain angle with the axis of the convex ring 14. The shape is circular, and the width and depth of the shallow groove are determined by the raw materials and products. In this embodiment, the shallow groove has a width ...

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Abstract

The present invention discloses one kind of polylactic acid sheet and its production apparatus, and belongs to the field of polymer sheet making and plasticizing apparatus. The polylactic acid sheet in the thickness of 0.2-2 mm and drawing ratio up to 1 to 2.3 may be adhered to paper or fiber fabric to form compound material. The polylactic acid sheet is extruded in a screw extruder with a barrier type screw bolt, which has at least one ring notch between the barrier section and the top and raised rings beside the notch with homogeneously distributed shallow slots. The cooling drum is provided with at least 3 cooling water channels. The production apparatus of the present invention can produce polylactic acid sheets with excellent performance continuously.

Description

technical field [0001] The invention relates to the manufacture of polymer compound sheets and a device for plasticizing molding materials, in particular to polylactic acid sheets and production equipment. Background technique [0002] Plastics are used in various fields such as industry, agriculture and daily life. However, plastics cannot be degraded in a short period of time, causing pollution to the convex environment, especially some materials containing harmful components, which cause harm to the convex environment. Now the whole society has raised awareness of environmental protection, and is eager to use materials that can be naturally biodegraded in nature in a short time to replace materials that cannot be degraded in a short time. The polylactic acid series plastic material is one of them. [0003] Polylactic acid is made of lactic acid as the basic raw material, which is directly or indirectly polymerized by convex ring opening to produce polymer poly α-hydroxy...

Claims

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Application Information

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IPC IPC(8): B29C47/12B29C47/92B29C47/60B29C47/88B29C47/34B29K67/00B29L7/00B29C48/30B29C48/355B29C48/92
Inventor 冯家振陈津生刘静云
Owner 陈津生
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