Antifogging crosslinked thermal shrinkage film and preparation method thereof

A heat-shrinkable film and anti-fog technology, applied in other household appliances and other directions, can solve the problem of low light transmittance of packaging materials, achieve long-term anti-fog, reduce water vapor, and improve the effect of cross-linking

Inactive Publication Date: 2019-11-05
GUANGDONG ANDELI NEW MATERIALS CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The main purpose of the present invention is to provide an anti-fog cross-linked heat shrinkable film, which aims to improve the low light transmittance of the packaging material caused by the temperature difference when the existing heat shrinkable film is used as a packaging material, which affects the user's observation of the display in the packaging bag. Things

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  • Antifogging crosslinked thermal shrinkage film and preparation method thereof

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preparation example Construction

[0026] The present invention proposes a preparation method of an anti-fog cross-linked heat-shrinkable film, comprising the following steps:

[0027] The outer layer, core layer and inner layer raw materials are mixed evenly, and then added to the extrusion equipment to melt, and after melting, the composite melt is obtained by co-extruding the layer;

[0028] The composite melt is inflated once, and the bubble after the first inflation is cooled and shaped to form a tube film;

[0029] The tube membrane is pulled to the electron irradiation cross-linking device, and the linear molecular chains of the tube membrane are cross-linked by electron irradiation;

[0030] Preheat the cross-linked tube film, after the preheating is completed, perform secondary inflation and simultaneous biaxial stretching to form a composite film;

[0031] The composite film is shaped after post-treatment, and the anti-fog cross-linked heat-shrinkable film is obtained by trimming and winding.

[003...

Embodiment 1

[0048] Outer material by weight percentage: 95% polyethylene, 4% silicone anti-blocking agent, 1% erucamide smooth agent, core material: 80% polyethylene, 5% erucamide slip agent Slip agent, 5% silicon-containing surfactant anti-fog agent, 5% N,N-methylenebisacrylamide crosslinking initiator and 5% nano-titanium dioxide slow-release agent, inner layer raw material: 93% poly Ethylene, 4% silicone anti-blocking agent, 1% erucamide slip agent and 2% anti-fogging and dripping agent were mixed evenly, and then added to the extrusion equipment to melt. The three heating zones of the extruder The temperature of the section is: feeding section 160°C, melting section 165°C, homogenizing section 180°C, the temperature of the four heating sections of the co-extrusion die is 185°C, the lip gap of the co-extrusion die is 1.5mm, Finally, the composite melt is obtained by co-extruding the layer;

[0049] The composite melt is inflated once, and the bubble after the first inflation is cooled...

Embodiment 2

[0054] Outer material by weight percentage: 90% polyethylene, 3% silicone anti-blocking agent, 7% erucamide slip agent, core layer material: 72% polyethylene, 4% erucamide slip agent Slip agent, 8% boron-containing surfactant anti-fog agent, 6% N,N-methylenebisacrylamide crosslinking initiator and 10% nano-titanium dioxide slow-release agent, inner layer raw material: 84% poly Ethylene, 8% silicone anti-blocking agent, 3% erucamide slip agent and 5% anti-fogging and dripping agent were mixed evenly, and then added to the extrusion equipment for melting. The three heating zones of the extruder The temperature of the section is: 170°C in the feeding section, 180°C in the melting section, and 185°C in the homogenization section. Composite melt obtained by co-extrusion layer;

[0055] The composite melt is inflated once, and the bubble after the first inflation is cooled and shaped to form a tube film;

[0056] The tube membrane is pulled to the electron accelerator. The irradia...

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Abstract

The invention discloses an antifogging crosslinked thermal shrinkage film and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing raw materials in an outer layer, a core layer and an inner layer, separately, then adding the raw materials into extruding equipment to be melted, separately, and passing the melted raw materials through a co-extrusion layer to obtain a compound melt; blowing the compound melt primarily, and cooling and sizing a primarily blown film bubble to form a pipe film; crosslinking linear molecular chains of the pipe film by electronic radiation; after pre-heating, carrying out secondary blowing and longitudinal drawing to obtain a compound film; and carrying out post-treatment sizing on the compound film, and trimming androlling the compound film to obtain the antifogging crosslinked thermal shrinkage film. An antifogging agent is relatively quick to play a role. When the antifogging crosslinked thermal shrinkage film is used as a packaging bag, the condition that the packaging bag is not transparent as water drops or fog state liquids are formed on the surface of the antifogging crosslinked thermal shrinkage film in a low-temperature environment is avoided. On the contrary, water vapor can be reduced effectively and the film is condensed to a liquid state water film, so that the inner side of the crosslinkedthermal shrinkage film is more transparent and higher in glossiness.

Description

technical field [0001] The invention relates to the technical field of heat-shrinkable films, in particular to an anti-fog cross-linked heat-shrinkable film and a preparation process thereof. Background technique [0002] Heat shrinkable film has good gloss and tear resistance, and is widely used in food, daily necessities, cosmetics and other fields as packaging materials. In addition, heat shrinkable film can also be used as a label to adhere to the surface of the container. It plays the role of introducing product information and brand promotion; at the same time, heat shrinkable film can also be used as a protective film for products in various industrial fields to protect products from pollution and corrosion during transportation, storage and processing. [0003] Since ordinary heat shrinkable films mostly use polyethylene material as the inner layer material, and its surface tension is small, when it is used as a packaging bag and displayed on the shelf, the water vap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/02B29C48/10B29C48/21B29K23/00B29K105/00B29L9/00
CPCB29C69/02B29K2023/06B29K2105/0005B29L2009/00B29C48/0017B29C48/0018B29C48/002B29C48/10B29C48/21
Inventor 张春生王丹旭苏阳陈捷新
Owner GUANGDONG ANDELI NEW MATERIALS CO LTD
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