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High resistively nine-layer co-extrusion-blown moulding film and its preparation process

A technology of blown film and co-extrusion, which is applied in the field of high-barrier nine-layer co-extrusion blown film and its preparation, and blown film, which can solve the problems of high raw material cost, film curling, and many processes

Inactive Publication Date: 2006-01-25
S & H SPECIAL NEW MATERIAL JIANGYIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] For a single-layer film, if it is necessary to make a multi-layer composite film, multiple single-layer films need to be realized by dry compounding or solvent compounding. Pollution, health performance is not very good
[0004] For the most similar seven-layer co-extruded composite film, structurally speaking, there are still fewer functional layers, and the proportion of each layer is relatively large. In the case of "excess quality", the proportion of expensive materials is relatively large. Raw materials high cost
At the same time, there is a phenomenon of film curling caused by different materials on the inner and outer surfaces of the film.

Method used

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  • High resistively nine-layer co-extrusion-blown moulding film and its preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Preparation of nine-layer co-extruded blown film with high barrier of about 160 microns, see figure 1 .

[0089] The uppermost layer (I) uses an extruder to mix the main raw material resin PA and additives evenly in the mixing hopper at the front of the extruder, then plasticizes the resin at 160-280°C and extrudes it into the final part of the mold. In the runner of the upper layer (I);

[0090] For the second layer (H), use an extruder to plasticize the adhesive material resin at 160-280°C, and extrude it into the runner of the second layer (H) of the mould;

[0091] The third layer (G) uses an extruder to uniformly stir the main raw material resin PE and additives in the mixing hopper at the front of the extruder, then plasticizes the resin at 160-280°C and extrudes it into the first layer of the mold. In the flow channel of the third layer (G);

[0092] For the fourth layer (F), use an extruder to plasticize the adhesive material resin at 160-280°C, and extrude i...

Embodiment 2

[0102] Preparation of nine-layer co-extrusion blown film with high barrier of about 80 microns

[0103] The uppermost layer (I), with an extruder, the main raw material resin PA or PET and additives are uniformly stirred in the mixing hopper at the front of the extruder, and the resin is plasticized at 160-280°C, and extruded into the mold. In the runner of the uppermost layer (I);

[0104] For the second layer (H), use an extruder to plasticize the adhesive material resin at 160-280°C, and extrude it into the runner of the second layer (H) of the mould;

[0105] The third layer (G) uses an extruder to uniformly mix the main raw material resins LDPE, HDPE and additives in the mixing hopper at the front of the extruder, then plasticize the resin at 160-280°C and extrude it into the mold In the runner of the third layer (G), the weight ratio of LDPE to HDPE is 1:2. Additives may or may not be added here.

[0106] For the fourth layer (F), use an extruder to plasticize the adh...

Embodiment 3

[0113] Preparation of nine-layer co-extrusion blown film with high barrier of about 70 microns

[0114] The uppermost layer (I), with an extruder, the main raw material resin PP or HDPE and additives are uniformly stirred in the mixing hopper at the front end of the extruder, and the resin is plasticized at 160-280°C and extruded into the mold. In the runner of the uppermost layer (I);

[0115] For the second layer (H), use an extruder to plasticize the adhesive material resin at 160-280°C, and extrude it into the runner of the second layer (H) of the mould;

[0116] The third layer (G) uses an extruder to uniformly stir the main raw material resins HDPE, LLDPE and additives in the mixing hopper at the front of the extruder, then plasticizes the resin at 160-280°C and extrudes it into the mold In the runner of the third layer (G), wherein the weight ratio of HDPE to LLDPE is 1:3;

[0117]For the fourth layer (F), use an extruder to plasticize the adhesive material resin at 1...

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Abstract

A high-isolation 9-layer plastic film with 25-300 microns in thickness and high mechanical and optical performance has an external surface layer and a thermally sealed bottom layer and is prepared through extruding out 9 film layers, overlapping via a single die, and co-extruding out while blow moulding.

Description

Technical field: [0001] The present invention relates to a blown film. Specifically relates to a high-barrier nine-layer co-extruded blown film and a preparation method thereof. It belongs to the technical field of packaging materials. Background technique: [0002] Before the present invention was made, existing packaging films had single-layer films and multi-layer films (up to seven layers), each of which had the following deficiencies: [0003] For a single-layer film, if it is necessary to make a multi-layer composite film, multiple single-layer films need to be realized by dry compounding or solvent compounding. Pollution, health performance is not very good. [0004] For the most similar seven-layer co-extruded composite film, structurally speaking, there are still fewer functional layers, and the proportion of each layer is relatively large. In the case of "excess quality", the proportion of expensive materials is relatively large. Raw materials high cost. At th...

Claims

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Application Information

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IPC IPC(8): B32B27/00
Inventor 刘涛何斌杜建平李翔
Owner S & H SPECIAL NEW MATERIAL JIANGYIN
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