High barrier polyethylene film and preparation method thereof

A polyethylene film, high barrier technology, applied in the field of polyethylene film, can solve the problems of difficult film process, poor water resistance, difficult to control the amount of paint, etc., to achieve the effect of reducing operation difficulty and production cost

Active Publication Date: 2018-12-04
ZHEJIANG CHENGDE PACKAGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the film prepared by adding ethylene-vinyl alcohol copolymer (EVOH), because the barrier property of EVOH is greatly affected by the environment, when the humidity is >60%, its barrier performance will be significantly reduced, and it can only be used in a dry environment; Films made of vinylidene chloride (PVDC) have the characteristics of flame resistance and corrosion resistance, but polyvinylidene chloride (PVDC) has strong polarity, is insoluble in common solvents at room temperature, has poor light and thermal stability, and is difficult to prepare films. Large; the film prepared by adding polyvinyl alcohol (PVA) has poor water resistance. In the c

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Example 1: Preparation of filler 1

[0023] The preparation steps of the filler in this embodiment are as follows:

[0024] Weigh the raw materials according to the following mass percentages: 10% 304 stainless steel powder, 15% nano titanium, 20% silver nitrate, 5% urea, 0.2% polyvinylpyrrolidone, 0.2% ammonium carbamate, 30% hydrophobic Water agent, 10% 50wt% nitric acid solution, 304 stainless steel powder with a particle size of 80nm, and nano-titanium with a particle size of 15nm;

[0025] Prepare urea into a saturated aqueous urea solution, then add nano-grade 304 stainless steel, heat to 40°C, keep it for 20 minutes, take it out, filter and wash it, add it to a 50wt% nitric acid solution, soak it at 90°C for 10 hours, take it out, and scrub Clean, get pretreated nano-grade 304 stainless steel, ready for use;

[0026] Add silver nitrate to the ethanol solution to prepare a 30wt% silver nitrate ethanol solution, add polyvinylpyrrolidone and stir evenly, then add nano-tita...

Example Embodiment

[0027] Example 2: Preparation of filler 2

[0028] The preparation steps of the filler in this embodiment are as follows:

[0029] Weigh the raw materials according to the following mass percentages: 8% 304 stainless steel powder, 13% nano titanium, 18% silver nitrate, 3% urea, 0.2% polyvinylpyrrolidone, 0.2% ammonium carbamate, 25% hydrophobic Aqueous solution, 10% 55% by weight nitric acid solution, 304 stainless steel powder with a particle size of 60nm, and nano-titanium with a particle size of 12nm;

[0030] Prepare urea into a saturated aqueous urea solution, then add nano-grade 304 stainless steel, heat to 40°C, keep it for 20 minutes, take it out, filter and wash it, add it to 55wt% nitric acid solution, soak it at 90°C for 13h, take it out, and brush it Clean, get pretreated nano-grade 304 stainless steel, ready for use;

[0031] Add silver nitrate to the ethanol solution to prepare a 20wt% silver nitrate ethanol solution, add polyvinylpyrrolidone and stir evenly, then add n...

Example Embodiment

[0032] Example 3: Preparation of filler three

[0033] The preparation steps of the filler in this embodiment are as follows:

[0034] Weigh the raw materials according to the following mass percentages: 9% 304 stainless steel powder, 15% nano titanium, 20% silver nitrate, 4% urea, 0.2% polyvinylpyrrolidone, 0.2% ammonium carbamate, 20% hydrophobic Water agent, 9% 55% by weight nitric acid solution, 304 stainless steel powder with a particle size of 50nm, and nano-titanium with a particle size of 10nm;

[0035] Prepare urea into a saturated aqueous urea solution, then add nano-grade 304 stainless steel, heat to 50°C, keep it for 20 minutes, take it out, filter and wash it, add it to 60wt% nitric acid solution, soak it at 90°C for 16h, take it out, brush it Clean, get pretreated nano-grade 304 stainless steel, ready for use;

[0036] Add silver nitrate to the ethanol solution to prepare a 10wt% silver nitrate ethanol solution, add polyvinylpyrrolidone and stir evenly, then add nano-ti...

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PUM

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Abstract

The invention discloses a high barrier polyethylene film and a preparation method thereof. The film comprises following components in parts by weight: 50 to 200 parts of polyethylene, 15 to 60 parts of filling material, 2 to 8 parts of plasticizer, and 10 to 20 parts of plastic additive, wherein the filling material is stainless steel based-silver/titanium composite particles. The preparation method comprises following steps: drying polyethylene resin and the filling material, then mixing polyethylene resin, the filling material, the plasticizer, and the plastic additive, carrying out plasticization and homogenization, extruding the melt by an extruding machine, filtering the melt by a filter screen, filling the melt into a mould, forwards pulling the film blank by a casting roller and a cooling roller, carrying out air blowing and longitudinal stretching to obtain a polyethylene film, at the same time, cooling the polyethylene film by a cooling air ring to gradually cure the film, andthen reeling the film by a pulling roller to obtain a bundle. The high barrier polyethylene film is prepared by one-time processing and moulding. The operation difficulty and production cost are reduced. The film can well prevent water or gas, has a certain antibacterial effect, is degradable and environmentally friendly, and can be recovered and reutilized.

Description

technical field [0001] The invention relates to the technical field of polyethylene films, in particular to a high-barrier polyethylene film and a preparation method thereof. Background technique [0002] In recent years, high-barrier film materials have been widely used in the market for food, medicine, chemical and other product packaging, electronics, etc. Device packaging and fuel cell diaphragm and other fields are developing rapidly. Excellent barrier properties are an important characteristic of high barrier film materials, including good gas barrier properties, moisture barrier properties, oil barrier properties, and fragrance retention properties. Early barrier film materials were represented by ethylene-vinyl alcohol copolymer (EVOH), polyamide (PA), polyvinylidene chloride (PVDC), polyvinyl alcohol (PVA) and other films, but with the development of food and beverage, medical, Driven by the strong demand for products in the fields of chemicals and daily necessiti...

Claims

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Application Information

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IPC IPC(8): C08L23/06C08K3/08C08J5/18
CPCC08J5/18C08J2323/06C08K3/08C08K2003/0806C08K2003/0881
Inventor 鲜志德陈华陈鹏
Owner ZHEJIANG CHENGDE PACKAGING
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