Polyethylene film with resealing function and preparation method thereof

A technology of polyethylene film and sealing function, which is applied in the field of polyethylene film with resealable function and its preparation, which can solve the problems of easy loss of odor of items, increase of packaging bag process, and easy dampness of items, so as to achieve no sense of frustration in hand feeling , smooth hand feeling, good anti-pollution effect

Active Publication Date: 2012-06-27
惠州宝柏包装有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods increase the process of packaging bags, and after sealing for a period of time, the items in the packaging bags are prone to moisture, the smell of the items is easy to lose, and the packaging effect is poor.

Method used

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  • Polyethylene film with resealing function and preparation method thereof
  • Polyethylene film with resealing function and preparation method thereof
  • Polyethylene film with resealing function and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A polyethylene film with a resealable function such as figure 1 As shown, the heat-sealing layer, middle layer and corona layer are produced by co-extrusion blown film, 1 is the corona layer, 2 is the middle layer, 3 is the heat-sealing layer, the corona layer, middle layer, heat-sealing layer The interlayer thickness ratio of the layers is 5:2:4, and the total thickness is 44 μm.

[0035] The heat-sealing layer is composed of 33% low-density polyethylene (LDPE), 66% linear low-density polyethylene (LLDPE), 0.7% slip agent oleic acid amide, and 0.3% polyurethane defoamer;

[0036] The middle layer is a modified ethylene-vinyl acetate copolymer hot melt adhesive, which consists of 70% ethylene-vinyl acetate copolymer (EVA), 25% tackifier petroleum resin, and 2% leveling agent modified polysiloxane Alkanes copolymer, 2% 2,6-di-tert-butylphenol antioxidant and 1% polyurethane defoamer.

[0037] The corona layer is low density polyethylene (LDPE).

[0038] Such as figu...

Embodiment 2

[0048] A polyethylene film with a resealable function is a three-layer co-extruded polyethylene film (PE), which is a corona layer, an intermediate layer, and a heat-sealing layer from the outside to the inside, and the thickness ratio between layers is 5.5: 2.5:4, the total thickness is 48μm.

[0049] The heat-sealing layer is composed of 33% low-density polyethylene (LDPE), 66% linear low-density polyethylene (LLDPE), 0.6% slip agent erucamide, and 0.4% polyurethane defoamer.

[0050] The middle layer is a modified ethylene-vinyl acetate copolymer hot melt adhesive, which consists of 45% ethylene-vinyl acetate copolymer (EVA), 50% tackifier rosin, and 3% leveling agent modified polysiloxane Copolymer, 1% 2,6-di-tert-butylphenol antioxidant and 1% polyurethane defoamer.

[0051] The corona layer is low density polyethylene (LDPE).

[0052] The peeling mode and resealing mode of the polyethylene film with resealable function in the embodiment of the present invention are the...

Embodiment 3

[0058] A polyethylene film with a resealable function is a three-layer co-extruded polyethylene film (PE), which is a corona layer, an intermediate layer, and a heat-sealing layer from the outside to the inside, and the thickness ratio between layers is 4.5: 1.5:3.5, the total thickness is 50μm.

[0059] The heat-sealing layer is composed of 49% low-density polyethylene (LDPE), 50% linear low-density polyethylene (LLDPE), 0.5% slip agent oleic acid amide and 0.3% slip agent erucamide, 0.2% slip agent Composition of polyurethane defoamer.

[0060] The middle layer is a modified ethylene-vinyl acetate copolymer hot melt adhesive, which consists of 56% ethylene-vinyl acetate copolymer (EVA), 40% tackifier petroleum resin, and 2% leveling agent modified polysiloxane Alkanes copolymer, 1.5% 2,6-di-tert-butylphenol antioxidant and 0.5% polyurethane defoamer.

[0061] The corona layer is low density polyethylene (LDPE).

[0062] The peeling mode and resealing mode of the polyethyl...

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Abstract

The invention belongs to the technical field of flexible package materials and discloses a polyethylene film with a resealing function. The polyethylene film is prepared from a heat sealing layer, an intermediate layer and a corona layer by film blowing through a coextrusion process, wherein the heat sealing layer consists of low-density polyethylene, linear low-density polyethylene and an additive; the intermediate layer is a modified ethylene vinyl acetate copolymer hot melt adhesive; the corona layer is made of low-density polyethylene; and the intermediate layer consists of 40 to 70 percent of ethylene vinyl acetate copolymer, 30 to 50 percent of tackifier, 2 to 3 percent of flatting agent, 1 to 2 percent of antioxidant and 0.5 to 1 percent of polyurethane defoaming agent. After being peeled from a polyethylene composite film or a cup material, the polyethylene film can be resealed with the polyethylene composite film or the cup material, a peeling mode is layered peeling, the initial peeling force is 8 to 10N / 15mm, when the film is uncovered, the film has a smooth handfeel without a transition feel, phenomena of wire drawing, burrs and the like are eliminated, the resealing strength is 1.5 to 2.5N / 15mm, and the sealing performance is high.

Description

technical field [0001] The invention belongs to the technical field of flexible packaging materials, and in particular relates to a polyethylene film with a resealable function and a preparation method thereof. Background technique [0002] There are usually two tear openings on both sides of the item packaging bag we use in daily life. When using it, just tear it along the tear opening on one side of the packaging bag. If there are a lot of contents in the packaging bag, it will take a while to use up , and this packaging bag cannot be sealed. If the opening is exposed to the air for a long time, the contents of the packaging bag will accumulate dust, which greatly affects the safety of the items; in addition, because the opening cannot be resealed, the packaging bag cannot be reused. It not only wastes resources but also pollutes the environment, and does not meet modern environmental protection requirements. [0003] At present, there are mainly two ways of resealable pa...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/32B32B27/30B32B27/18B29C55/28
Inventor 崔晓松高虎黄鹤邹燕红
Owner 惠州宝柏包装有限公司
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