High-barrier BOPP aluminum-plated film and preparation method thereof

An aluminized film and high-barrier technology, applied in the field of high-barrier BOPP aluminized film and its preparation, can solve the problems of limited application range, long distance, and difficulty in meeting the requirements of BOPP aluminized film, and achieves good dimensional stability. , low sealing temperature, and the effect of increasing the proportion of high-tech products

Active Publication Date: 2018-01-09
SHANGHAI RADIX VACUUM METALIZING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome that the existing BOPP aluminized film is difficult to meet the requirements of the composite flexible packaging bag and label printing industry for BOPP aluminized film, and the peel strength between the aluminized layer and the second outer layer is basically ≤0.5N / 15mm, which is far from the national pharmaceutical industry standard YY0236-1996, and the scope of application is limited. Provide a high-barrier BOPP aluminum-coated film and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] A kind of preparation method of high barrier type BOPP aluminized film:

[0052] (1) Raw material treatment: dedusting and vacuum drying at 105°C for 6 hours to remove traces of water and dust contained in the raw material to obtain PP raw material after dedusting and drying pretreatment; the modified additive ethylene-octene copolymer (POE) 8150 type and the above-mentioned PP raw material after dedusting and drying pretreatment are fully mixed according to the weight ratio of 2:100, and the PP raw material after modification treatment is obtained by pretreatment at 80°C for 4 hours in a low-temperature vacuum.

[0053] (2) Feeding and melting plasticization: In the feeding section, the modified PP raw material is added, the length-to-diameter ratio of the extruder is 35, and the melting and plasticizing temperature is 180°C. In the feeding section, the PP raw material has to go through The length of 3 times the diameter of the screw starts to melt, and the complete me...

Embodiment 2

[0066] A kind of preparation method of high barrier type BOPP aluminized film:

[0067] (1) Raw material treatment: dedusting and vacuum drying at 110°C for 4 hours to remove traces of water and dust contained in the raw material to obtain PP raw material after dedusting and drying pretreatment; the modified additive ethylene-octene copolymer (POE) 8150 type and the above-mentioned PP raw material after dedusting and drying pretreatment are fully mixed according to the weight ratio of 3:100, and the 80°C low-temperature vacuum pretreatment is performed for 6 hours to obtain the modified PP raw material.

[0068] (2) Feeding and melting plasticization: In the feeding section, the modified PP raw material is added. The length-to-diameter ratio of the extruder is 45, and the melting and plasticizing temperature is 190°C. In the feeding section, the PP raw material has to go through The length of 3 times the diameter of the screw starts to melt, and the complete melting takes 5 ti...

Embodiment 3

[0081] A kind of preparation method of high barrier type BOPP aluminized film:

[0082] (1) Raw material treatment: dedusting and vacuum drying at 100°C for 5 hours to remove trace water and dust contained in the raw material to obtain PP raw material after dedusting and drying pretreatment; the modified additive ethylene-octene copolymer (POE) 8150 type and the above-mentioned PP raw material after dedusting and drying pretreatment are fully mixed according to the weight ratio of 4:100, and the PP raw material after modification treatment is obtained by vacuum pretreatment at 80°C for 5 hours.

[0083] (2) Feeding and melting plasticization: In the feeding section, the modified PP raw material is added, the length-to-diameter ratio of the extruder is 35, and the melting and plasticizing temperature is 180°C. In the feeding section, the PP raw material has to go through The length of 3 times the diameter of the screw starts to melt, and the complete melting takes 6 times the l...

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Abstract

The invention discloses a high-barrier BOPP aluminum-plated film and a preparation method thereof. The preparation method comprises the steps of: raw material treatment; feeding and fusion plastifying; extrusion; casting cooling; longitudinal stretching; transverse stretching; corona treatment; traction coiling; ageing treatment; slitting; and vacuum aluminum plating. Under the conditions of 38 DEG C and relative humidity of 90%, the high-barrier BOPP aluminum-plated film prepared by the preparation method reaches the water vapor permeability of not more than 0.2 g/(m2.24h) and the oxygen permeability of not more than 25 cm3/(m2.24h); the hot sealing strength of a hot sealing surface of the prepared high-barrier BOPP aluminum-plated film is not less than 3.0 N/15 mm; and the sealing temperature is not higher than 115 DEG C. The high-barrier BOPP aluminum-plated film prepared by the preparation method can synchronously reach the composite flexible packing bag and label printing industrystandard and the YY0236-1996 industry standard, and can be used for packing materials in such fields as foods and medicines with high-barrier packing requirements.

Description

technical field [0001] The invention relates to the field of production technology in composite flexible packaging and label printing industries, in particular to a high-barrier BOPP aluminized film and a preparation method thereof. Background technique [0002] At present, PET (polyethylene terephthalate) and BOPP (biaxially oriented polypropylene film) are often selected as substrates for aluminized film in the composite flexible packaging and label printing industries on the market. Among them, BOPP has attracted much attention due to its advantages of light weight, low price, non-toxicity, moisture resistance, good printing performance, low haze and good decorative performance. High-barrier BOPP substrate aluminized film is a relatively new high-end product among polypropylene films. It has high requirements for barrier properties, aluminized adhesion strength, and heat-sealing strength. At present, there are very few enterprises that can produce this product in my count...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D7/01B29C47/06B29C59/10B32B27/20B32B27/32B32B27/08B32B37/24B32B33/00
Inventor 洪晓冬杨正龙
Owner SHANGHAI RADIX VACUUM METALIZING
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