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A kind of low precipitation yellowing resistance high hydrophobic polyethylene cast film and preparation method thereof

A technology with high hydrophobicity and yellowing resistance, applied in the field of polymer materials, can solve the problems of low molecular weight precipitates and high hydrophobicity, and achieve the effects of good continuous production, high hydrophobicity, and low precipitation

Active Publication Date: 2022-08-05
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a low-separation yellowing resistance and high hydrophobicity polyethylene cast film, which is used to improve the existing polyethylene products that cannot have low molecular weight precipitates and high hydrophobicity when the casting method is used to produce the cast film. The characteristics of low precipitation and anti-yellowing high hydrophobic polyethylene cast film provided by the present invention, the precipitation is much lower than that of the same type of resin, and the transparency and yellowing resistance are significantly improved, so that the cast film can be used for a long time Maintain good appearance and have high hydrophobicity to meet the appearance requirements of polyethylene cast film packaging manufacturers

Method used

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  • A kind of low precipitation yellowing resistance high hydrophobic polyethylene cast film and preparation method thereof
  • A kind of low precipitation yellowing resistance high hydrophobic polyethylene cast film and preparation method thereof
  • A kind of low precipitation yellowing resistance high hydrophobic polyethylene cast film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] Preparation of compound masterbatch: bis(2,2,6,6-tetramethyl-4-piperidinyl) with ethylene-ethyl vinyl ether valine copolymer P1 of 4.0Kg and mass ratio of 1:2 ) 283 g of sebacic acid ester and 2-hydroxy-4-n-octyloxybenzophenone mixture, the mass ratio of 2,4-di-tert-butylphenol and 2,6-di-tert-butylphenol is 1:4 396 g of mixture, 453 g of polyfluoroalkyl glycol, 453 g of polydimethylsiloxane, 226 g of beidellite, and 226 g of yttrium carbide. The selected quality raw materials are mixed evenly, dehumidified and dried at 80 °C for 6 hours, sent to a screw extruder with a length-to-diameter ratio of 35:1, and the temperature of the extruder is controlled to 120 °C.

[0063] Preparation of cast film resin: 100kg of polyethylene powder, 60g of tris(2,4-di-tert-butylphenyl)phosphite, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propane Octadecyl acid 30g, octadecyl glycol amine 22g, zinc stearate 28g, compound masterbatch 6kg. After mixing the raw materials of the selected quality...

Embodiment 2

[0065] Preparation of compound masterbatch: bis(2,2,6,6-tetramethyl-4-piperidinyl) with ethylene-ethyl vinyl ether valine copolymer P1 of 4.0Kg and mass ratio of 1:2 ) 132g mixture of sebacic acid ester and 2-hydroxy-4-n-octyloxybenzophenone, the mass ratio of 2,4-di-tert-butylphenol and 2,6-di-tert-butylphenol is 1:4 330 g of the mixture, 396 g of polyfluoroalkyl glycol, 396 g of polydimethylsiloxane, 396 g of beidellite, and 396 g of yttrium carbide. The raw materials of selected quality are mixed evenly, dehumidified and dried at 80 °C for 6 hours, sent to a screw extruder with a length-to-diameter ratio of 35:1, and the temperature of the extruder is controlled to 120 °C. .

[0066] Preparation of cast film resin: 100kg of polyethylene powder, 70g of tris(2,4-di-tert-butylphenyl)phosphite, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propane 40g of octadecyl acid ester, 25g of octadecyl glycol amine, 33g of zinc stearate, 7kg of compound masterbatch. After mixing each raw mater...

Embodiment 3

[0068] Preparation of compound masterbatch: bis(2,2,6,6-tetramethyl-4-piperidinyl) with ethylene-ethyl vinyl ether valine copolymer P2 of 3.2Kg and mass ratio of 1:2 ) 426g of sebacic acid ester and 2-hydroxy-4-n-octyloxybenzophenone mixture, the mass ratio of 2,4-di-tert-butylphenol and 2,6-di-tert-butylphenol is 1:4 319 g of mixture, 266 g of polyfluoroalkyl glycol, 266 g of polydimethylsiloxane, 266 g of beidellite, and 266 g of yttrium carbide. The raw materials of selected quality are mixed evenly, dehumidified and dried at 80 °C for 6 hours, sent to a screw extruder with an aspect ratio of 35:1, and the temperature of the extruder is controlled to 120 °C, and the pellets are extracted and dried. .

[0069] Preparation of cast film resin: 95kg of polyethylene powder, 50g of tris(2,4-di-tert-butylphenyl)phosphite, β-(3,5-di-tert-butyl-4-hydroxyphenyl)propane 20g of octadecyl acid ester, 18g of octadecyl glycol amine, 20g of zinc stearate, 5kg of compound masterbatch. Af...

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Abstract

The invention discloses a low-precipitation-resistant, high-hydrophobic polyethylene cast film and a preparation method thereof. The raw material composition of the method is: polyethylene powder, antioxidant A, antioxidant B, antistatic agent, zinc stearate, compound master batch, wherein the compound master batch comprises: ethylene-ethyl vinyl Ether-valine copolymer, light absorber, antioxidant C, polyfluoroalkyl glycol, polydimethylsiloxane, beidellite, yttrium carbide. The low precipitation yellowing resistance and high hydrophobicity polyethylene cast film prepared by the resin of the invention has far lower precipitation than the same type of resin, and the transparency and yellowing resistance are obviously improved, so that the cast film can keep a good quality for a long time. Appearance and high hydrophobicity.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a low-precipitation-yellowing-resistant high-hydrophobic polyethylene cast film and a preparation method thereof. Background technique [0002] Cast film is a non-stretch, non-oriented cast film produced by melt casting quenching. Because polyethylene cast film has good toughness, low temperature resistance, transparency, puncture resistance and good heat-sealing performance, it is widely used in supermarkets and households for various vegetables and food packaging films, fresh-keeping films, logistics The market demand for stretch wrapping films used in the packaging industry is increasing year by year. In the polyethylene cast packaging film, the gloss and transparency of the film are required to be high, and the manufacturers pay more and more attention to the appearance and optical properties of the film. [0003] In recent years, the demand for hydrophobic cast...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L23/08C08L83/04C08K3/14C08K5/098C08K3/34C08K5/053C08J5/18C08J3/22
CPCC08J5/18C08J3/226C08J2323/06C08J2423/08C08J2483/04C08K3/14C08K5/098C08K3/346C08K5/053
Inventor 李胜龙徐彦龙朱文俊蓝程程张宏科
Owner WANHUA CHEM GRP CO LTD