Low-temperature heat sealing polyolefin thin film and preparation method thereof

A low-temperature heat-sealing, polyolefin technology, applied in chemical instruments and methods, synthetic resin layered products, layered products, etc., can solve the problems of low initial sealing temperature and heat sealing strength, and achieve ultra-low initial sealing temperature, High heat-seal strength and improved processing fluidity

Active Publication Date: 2016-12-21
福融新材料股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention solves the stickiness problem caused by the addition of PBE elastomer by adding nano-silica and slippery agent in the heat-sealing layer, ensuring that the strength and stiffness of the film do not decrease; adding an appropriate amount of LDPE improves the processing flow High elastic stretch forming technology combined with microcrystalline nucleation to prepare polyolefin heat-sealing film with transparency, ultra-low initial sealing temperature and high heat-sealing strength

Method used

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  • Low-temperature heat sealing polyolefin thin film and preparation method thereof
  • Low-temperature heat sealing polyolefin thin film and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0046] A low-temperature heat-sealing polyolefin film, comprising a corona layer, a core layer and a heat-sealing layer from top to bottom; the corona layer is PP resin without processing aids, and the core layer is composed of: homopolymer 97.5wt% of polypropylene, 0.1wt% of blocking agent, 2.4wt% of slippery agent; Its composition of described heat-sealing layer is: PBE elastomer 70wt%, metallocene linear low density polyethylene 19wt%, LDPE 5wt% , nano silicon dioxide 1.0wt%, smooth agent 5.0wt%.

[0047] The low-temperature heat-sealing polyolefin film, wherein, the ratio of each layer is: corona layer 8wt%, core layer 84wt%, heat-sealing layer 8wt%.

[0048] The preparation method of low-temperature heat-sealing polyolefin film as mentioned above, concrete steps are:

[0049] (1) The raw materials of corona layer, core layer and heat-sealing layer are measured according to the formula ratio and mixed evenly;

[0050] (2) Add the three mixed raw materials into the extrud...

Embodiment 2

[0053] A low-temperature heat-sealing polyolefin film, comprising a corona layer, a core layer and a heat-sealing layer from top to bottom; the corona layer is PP resin without processing aids, and the core layer is composed of: homopolymer 98wt% polypropylene, 0.2wt% anti-blocking agent, 1.8wt% smoothing agent, the raw material composition of the heat-sealing layer is: 45wt% PBE elastomer, 49wt% metallocene linear low density polyethylene, 3wt% LDPE, nano Silicon dioxide 1.0wt%, slip agent 2.0wt%.

[0054]The low-temperature heat-sealed polyolefin film has a ratio of each layer: 10wt% of the corona layer, 80wt% of the core layer, and 10wt% of the heat-sealing layer.

[0055] The preparation method of low-temperature heat-sealing polyolefin film as mentioned above, concrete steps are:

[0056] (1) The raw materials of the three layers of corona layer, core layer and heat-sealing layer are measured according to the formula ratio and mixed evenly;

[0057] (2) Add the three mi...

Embodiment 3

[0060] A low-temperature heat-sealing polyolefin film, comprising a corona layer, a core layer and a heat-sealing layer from top to bottom; the corona layer is PP resin without processing aids, and the core layer is composed of: homopolymer 98.5wt% polypropylene, 0.3wt% anti-blocking agent, 1.2wt% slippery agent, the raw material composition of the heat-sealing layer is: 45wt% PBE elastomer, 45wt% metallocene linear low density polyethylene, 4wt% LDPE, nano Silicon dioxide 3.0wt%, slip agent 3.0wt%.

[0061] The low-temperature heat-sealed polyolefin film has a proportion of each layer: 15wt% of the corona layer, 70wt% of the core layer, and 15wt% of the heat-sealing layer.

[0062] The preparation method of low-temperature heat-sealing polyolefin film as mentioned above, concrete steps are:

[0063] (1) The raw materials of the three layers of corona layer, core layer and heat-sealing layer are measured according to the formula ratio and mixed evenly;

[0064] (2) The three...

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Abstract

The invention belongs to the field of preparation of heat sealing thin films, and particularly relates to a low-temperature heat sealing polyolefin thin film and a preparation method thereof. The low-temperature heat sealing polyolefin thin film comprises a corona layer, a core layer and a heat sealing layer from top to bottom, wherein the heat sealing layer is a composite material prepared from a PBE elastomer, metallocene linear low-density polyethylene, LDPE, nanosilicon dioxide and a smooth agent. According to the low-temperature heat sealing polyolefin thin film and the preparation method thereof, by the adding of the nanosilicon dioxide and the smooth agent into the heat sealing layer, the problem of adhesion caused by the adding of the PBE elastomer is solved, and the intensity and the stiffness of the thin film cannot be reduced; by the adding of the proper amount of LDPE, the processing flowability is improved; an elastomeric state drawing molding technology is combined with crystallite nucleation, so that the transparent polyolefin heat sealing thin film with ultralow start-sealing temperature and high heat sealing intensity is prepared.

Description

technical field [0001] The invention belongs to the field of heat-sealing film preparation, and in particular relates to a low-temperature heat-sealing polyolefin film and a preparation method thereof. Background technique [0002] Heat-sealing films are widely used in daily chemical product packaging, food, pharmaceutical packaging and other fields. At present, the commonly used heat-sealing film is polyolefin film. The plastic film for heat sealing has the following important performance requirements: (1) The initial temperature of heat sealing should be low to adapt to the use requirements of high-speed automatic bag filling and filling machine; (2) The plastic film for heat sealing should have good Excellent cold and heat resistance; (3) The heat seal strength should be higher. [0003] The polypropylene film used as a heat-sealing film has good stiffness, tensile strength and heat-sealing strength, but the heat-sealing temperature is relatively high, resulting in high...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/06B32B27/08B32B27/32B32B27/30
CPCB32B27/08B32B27/30B32B27/32
Inventor 姜立菲林渊智苏羽航林华美陈文韬林仕马俊
Owner 福融新材料股份有限公司
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