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Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method

A biaxially oriented film, polypropylene technology, applied in the direction of film/sheet adhesive, adhesive type, grafted polymer adhesive, etc., can solve the problems of low lamination speed, etc. The effect of secondary processing, excellent thermal compounding properties, high stiffness

Inactive Publication Date: 2015-03-25
李波 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantage is that the temperature during heating and bonding is much higher than that of the existing EVA pre-coating film, which will not only cause low lamination speed, but also the peeling fastness after lamination is much lower than that of the EVA pre-coating film. Therefore, this technology produces The composite film can only achieve the same lamination speed and adhesion fastness as the instant coating film

Method used

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  • Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method
  • Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method
  • Bidirectional stretching polypropylene film for hot binding compounding, and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] The 20-micron BOPP thermal lamination protective film is produced on a 5-layer co-extruded double-bubble biaxial stretching equipment, and its structure is shown in the table below.

[0082]

[0083] Processing technology and parameters

[0084]

[0085] The functional layer of the polypropylene biaxially oriented film of Example 1 is measured by differential scanning calorimetry (DSC), and the melting peak area on the DSC curve with a melting point lower than 90 degrees accounts for about 90% of the total area of ​​the DSC curve.

Embodiment 2

[0087] A 20-micron BOPP thermal lamination protective film is produced on a 5-layer co-extrusion double bubble process (Double Bubble Process) biaxial stretching equipment, and its structure is shown in the table below.

[0088]

[0089] Processing technology and parameters

[0090]

[0091] The functional layer of the polypropylene biaxially oriented film in Example 2 is measured by differential scanning calorimetry (DSC), and the melting peak area on the DSC curve with a melting point lower than 90 degrees accounts for about 75% of the total area of ​​the DSC curve.

Embodiment 3

[0093] The BOPP thermal lamination protective film is produced on the 5-layer co-extruded double-bubble biaxial stretching equipment, and its structure is shown in the table below.

[0094]

[0095] Processing technology and parameters

[0096]

[0097] The functional layer of the polypropylene biaxially oriented film in Example 3 was measured by differential scanning calorimetry (DSC), and the melting peak area on the DSC curve with a melting point lower than 90 degrees accounted for about 72% of the total area of ​​the DSC curve.

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Abstract

The invention provides a stretching polypropylene film and its preparation method. The film comprises a co-extrusion compounding base layer and a hot binding function layer, wherein the function layer comprises a component (A), or a component (B), or a mixture of the component (A) and the component (B); the component (A) is an ethylene copolymer having a polar group; the component (B) is selected from an ethylene-butylene copolymer, an ethylene-hexene copolymer, an ethylene-octene copolymer, and a mixture of the above copolymers; the ratio of the vertical elongation rate to the transverse elongation rate of the bidirectional stretching polypropylene film is less than 2; and the surface tension of the function layer of the film is in a range of 36-48dyne / cm. The invention also provides a use of the film in the preparation of film coated paper through the heating compounding with paper, and the film coated paper containing the film.

Description

technical field [0001] The invention relates to the field of plastic film products and production techniques. Specifically, the invention relates to a polypropylene biaxially stretched film composited with paper, metal and other materials and a preparation method thereof. Background technique [0002] Biaxially oriented polypropylene film (BOPP) has the advantages of light weight, high gloss, high transparency, non-toxicity, moisture resistance, low air permeability, high stiffness, etc. It is widely used in food, medicine, daily light industry, cigarettes and other products Packaging and lamination. One of the uses of BOPP film is to stick to the surface of paper, such as books, packaging cartons, etc., to prevent moisture and increase surface gloss. [0003] Polypropylene biaxially stretched film is generally a co-extruded structure of 3-5 layers. The most common is a 3-layer structure, which is divided into an outer base layer, a core base layer and a functional layer....

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J7/02C09J123/08C09J151/06D21H27/18B29C47/00B29C55/16B29C71/04
Inventor 李波金新锋纪长永周荣彬刘祖发
Owner 李波