Distributor structure for preparing multiple layers of CPP thin films

A distributor and film technology, applied in the field of distributor structure of multilayer CPP film, can solve the problems of uneven distribution technology, difficult to distribute evenly, and difficult to co-extrude multi-layer CPP film layers, etc., to achieve fluid stability and formulation. Evenly distributed effect

Active Publication Date: 2018-08-14

SUZHOU RDX NEW MATERIAL TECH CO LTD

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AI-Extracted Technical Summary

Problems solved by technology

However, due to the uneven shunting technology of the current distributor, especially when the single-layer CPP film layer is bel...

Abstract

The invention provides a distributor structure for preparing multiple layers of CPP thin films. According to the distributor structure for preparing the multiple layers of CPP thin films, the problemsthat the flow dividing technology of an existing distributor is uneven, especially when the thickness of a single CPP film layer is lower than 15 [mu]m or below, even distributing is difficult to achieve, and consequently, co-extrusion of the multiple CPP film layers is difficult to achieve are solved. The distributor structure adopts the mode that multiple sprue spreaders are adopted for flow dividing, then converging is conducted again, thus olypropylene melt liquid can be evenly distributed through the distributor structure, and the thickness of each layer of CPP thin film can reach 5 [mu]m-15 [mu]m; and in this way, the original single layer of CPP thin film can be replaced with the multiple layers of CPP thin films, and meanwhile, the material cost is not increased.

Application Domain

Flat articles

Technology Topic

Co extrusionElectrical and Electronics engineering +3

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Examples

Experimental program(2)

Example

[0018] Specific implementation case 1:

[0019] Such as figure 1 Shown is a schematic diagram of a distributor structure for preparing a multilayer CPP film, which includes: a raw material inlet (10), a split cone (11, 12, 14, 15), a split tube (111, 112, 114, 115), the central tube (113), and the restrictor cone (13), characterized in that: two split cones (11, 12) are sleeved concentrically on the central tube (113) in turn, the first split cone (11) One end is connected to the raw material inlet (10), and the other section of the first split cone (11) is concentrically nested at one end of the second split cone (12), passing through a split cone (11, 12, 14, 15) , The fluid will be divided into 2 strands and transmitted along the axial direction through the shunt pipes (111, 112, 114, 115). A restrictor cone (13) is sleeved at the end of the central pipe (113) and will pass through the restrictor. The fluid in the flow cone (13) and the front shunt pipes (111, 114) will merge into a stream I, and the fluid passing through the restrictor (13) and the front shunt pipes (112, 115) will merge into one stream. Fluid II, fluid I and fluid II can be split after passing through the split cones (14, 15) respectively, and enter the same layer of the extruder die through the draft tube (211~216), so that six layers can be formed Co-extruded CPP film. And the thickness of each layer can be 10um.

Example

[0020] Specific implementation case 2:

[0021] A distributor for preparing a multilayer CPP film, which includes: a raw material inlet (10), a split cone (11, 12, 14, 15), a split tube (111, 112, 114, 115), a central tube (113) ), restrictor cone (13), characterized in that: two split cones (11, 12) are sleeved concentrically on the central tube (113) in turn, one end of the first split cone (11) is connected to the raw material inlet (10) ) Is connected, the other segment of the first split cone (11) is concentrically nested at one end of the second split cone (12), each time it passes through a split cone (11, 12, 14, 15), the fluid will be divided into 2 And pass through the shunt pipes (111, 112, 114, 115) along the axial direction. A restrictor cone (13) is sleeved at the end of the central pipe (113), and the fluid passing through the restrictor cone (13) It will merge with the previous shunt pipes (111, 114) into a stream of fluid I, and at the same time the fluid passing through the restrictor cone (13) and the previous shunt pipes (112, 115) will merge into a stream of fluid II, fluid I and fluid II can enter into the same layer of the extruder die through two draft tubes respectively, so that two layers of co-extruded CPP film can be formed, and the thickness of each layer is 12um.

[0022] It can be seen that the present invention proposes a distributor structure for preparing multilayer CPP films, which can uniformly distribute the polypropylene melt and make the thickness of each CPP film reach 5um-15um. In this way, the original single-layer CPP film can be replaced with a multi-layer CPP film without increasing the material cost.

PUM

Description & Claims & Application Information

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