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Biaxial stretching polypropylene film and preparation method thereof

A technology of polypropylene film and biaxial stretching, applied in chemical instruments and methods, layered products, synthetic resin layered products, etc., can solve problems affecting product quality, curling, unfavorable environmental protection, etc., to save production processes and reduce Production cost, environmental protection effect

Active Publication Date: 2009-02-11
QUANZHOU LICHANG PLASTIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the temperature of thermal bonding between paper and plastic film cannot exceed 95°C, because when the processing temperature exceeds 95°C, the moisture in the paper will be lost, causing the paper to deform, curl and become brittle, which will affect the quality of the product.
Due to the high melting point of polypropylene and poor thermal bonding performance, ordinary biaxially oriented polypropylene film cannot be directly thermally bonded to paper at a temperature of about 95°C.
In addition, due to the non-polarity of polypropylene, the polypropylene resin layer cannot be well compounded with polar materials such as metal, glass, and most plastics. In the current production process, ordinary biaxially oriented polypropylene film and paper , plastic, glass, metal and other materials are mainly compounded by coating a layer of adhesive on the surface of polypropylene film, and then compounding with paper, plastic, glass, metal and other materials after heating. In this way, more A production process, the production cost is also greatly increased, and excessive use of adhesives and solvents is not conducive to environmental protection

Method used

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  • Biaxial stretching polypropylene film and preparation method thereof
  • Biaxial stretching polypropylene film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Embodiment 1 (three-layer coextrusion structure)

[0051] 1) After mixing 88% polypropylene resin HP 425 J (MFR: 3.1g / 10min), 2% antistatic masterbatch and 10% plasticizer (containing 50% petroleum resin) according to the proportion, Send it into the main extruder, the temperature of the main extruder is 210°C;

[0052] 2) Feed 100% ethylene-acrylic acid copolymer (acrylic acid monomer content is 9%, MFR is 2.0g / 10min) into an auxiliary extruder, and the temperature of the extruder is 180°C;

[0053] 3) Mix 98.5% polypropylene resin HP 425 J (MFR: 3.1g / 10min) and 1.5% anti-blocking masterbatch evenly and send it into another auxiliary extruder, the temperature of the extruder is 230°C;

[0054] 4) After the raw materials in the three extruders are melted and plasticized, they enter the same T-shaped die to form a melt with a three-layer co-extrusion structure of adhesive layer / polypropylene resin layer / polypropylene resin layer. The set temperature is 250°C;

[0055]...

Embodiment 2

[0060] Embodiment 2 (three-layer coextrusion structure)

[0061] 1) After mixing 88% polypropylene resin HP 425 J (MFR: 3.1g / 10min), 2% antistatic masterbatch and 10% plasticizer (containing 50% petroleum resin) according to the proportion, Send it into the main extruder, the set temperature of the main extruder is 200-250°C;

[0062] 2) Send 50% ethylene-alpha olefin copolymer (containing 5% petroleum resin) and 50% ethylene-methyl acrylate copolymer (EMA) into an auxiliary extruder, the set temperature of the extruder 200-290°C;

[0063] 3) Mix 98.0% polypropylene resin HP 425 J (MFR: 3.1g / 10min) and 2.0% anti-blocking masterbatch evenly and send it into another auxiliary extruder. The set temperature of the extruder is 190-250°C;

[0064] 4) After the raw materials in the three extruders are melted and plasticized, they enter the same T-shaped die to form a melt with a three-layer co-extrusion structure of adhesive layer / polypropylene resin layer / polypropylene resin laye...

Embodiment 3

[0070] Embodiment 3 (five layers of co-extrusion structure)

[0071] 1) After mixing 88% polypropylene resin HP 425 J (MFR: 3.1g / 10min), 2% antistatic masterbatch, and 10% plasticizer (50% petroleum resin) according to the proportion, Send it into the main extruder, the set temperature of the main extruder is 230°C;

[0072] 2) After mixing 88% polypropylene resin HP 425 J (MFR: 3.1g / 10min), 2% antistatic masterbatch, and 10% plasticizer (containing 50% petroleum resin) according to the proportion, Sent to two interlayer extruders respectively, and the set temperature of the extruders is 230°C;

[0073] 3) Send 80% polyethylene and 20% ethylene-sodium (meth)acrylate into an auxiliary extruder, and the set temperature of the extruder is 290°C;

[0074] 4) Send 100% of the matting masterbatch into another auxiliary extruder, and the set temperature of the extruder is 220°C;

[0075] 5) After the raw materials in the five extruders are melted and plasticized, they enter the T-...

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Abstract

The invention discloses a biaxial stretching polypropylene film which is a composite layer structure. One surface layer is a binding layer, and the material of the binding layer adopts polyethylene, vinyl copolymer and ionic polymer. The invention also provides a preparation method for the biaxial stretching polypropylene film, which comprises the following process steps: firstly, the raw material of the intermediate layer is put into an extruding machine; secondly, the raw material of the binding layer is put into an auxiliary extruding machine; thirdly, the raw material of the bottom layer is put into another auxiliary extruding machine; fourthly, the raw materials are fused and plasticized and then extruded out for confluence, to form a composite layer co-extrusion thick piece by a T-shaped die head; fifthly, the obtained thick piece is molded by cooling, then biaxially stretched, and then coiled into a 12-80 Mum multi-layer co-extrusion biaxial stretching polypropylene film at a recoiling machine by thickness measuring, edge cutting and single sided or two sided corona treatment, and the thickness of the binding layer is 0.8-10 Mum.

Description

Technical field: [0001] The present invention relates to a kind of biaxially stretched polypropylene film and its manufacture method, especially relate to a kind of surface layer is adhesive layer, another surface layer is polypropylene resin layer or dull layer, middle layer is polypropylene resin layer and can be combined with A biaxially oriented polypropylene film and a manufacturing method thereof are directly thermally compounded with materials such as paper, plastic, glass, and metal. Background technique: [0002] The current commercially available three-layer co-extruded biaxially oriented polypropylene film has a structure of: polypropylene resin layer / polypropylene resin layer / polypropylene resin layer or matte layer. The structure of the common five-layer co-extruded biaxially oriented polypropylene film is: polypropylene resin layer / polypropylene resin layer / polypropylene resin layer / polypropylene resin layer / polypropylene resin layer or matte layer. [0003] T...

Claims

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Application Information

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IPC IPC(8): B32B27/18B32B27/32B29C69/02B29C47/06B29C47/56B29C55/12B29K23/00B29L9/00
Inventor 王秀京吕达民
Owner QUANZHOU LICHANG PLASTIC
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