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Formula and preparation process of flexible package single-material heat-resistant layer MDO-PE film

A MDO-PE and film preparation technology, applied in the field of packaging materials, can solve the problems of heat resistance, transparency, and mechanical properties that are difficult to meet the needs of the heat-resistant layer of a single material for flexible packaging, and cannot meet the requirements of bag making and processing, and achieve excellent bag making. high temperature requirements, good heat resistance and cold resistance, and the effect of improving transparency

Pending Publication Date: 2022-04-12
扬州晟至宝新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a single-material heat-resistant layer MDO-PE film formula and preparation process for flexible packaging, which solves the difficulty in meeting the heat resistance, transparency, and mechanical properties of existing flexible packaging films. Can't satisfy people's bag making and processing problems

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  • Formula and preparation process of flexible package single-material heat-resistant layer MDO-PE film

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Effect test

Embodiment 1

[0029] refer to figure 1 , flexible packaging single material heat-resistant layer MDO-PE film formula, its formula includes: nucleating agent masterbatch, A group of materials, B group of materials; The number of crystalline nuclei is greatly increased, and the crystallization speed is accelerated, thereby increasing the crystallinity of the PE film, ensuring the strength of the PE film, improving the transparency of the PE film, and also increasing the gloss and brilliance of the film. The weight percentage of group A materials is 45%, the weight percentage of group B materials is 45%, and its formula also includes heat-resistant masterbatch and weather-resistant masterbatch.

[0030] In the present invention, group A materials include 92% of high-density polyethylene (HDPE), 2% of polyolefin plastomer, and group B of materials include 92% of high-density polyethylene (HDPE), 5% of polyolefin plastomer, anti-blocking matrix Material 0.5%, high density polyethylene density 0...

Embodiment 2

[0039] refer to figure 1, flexible packaging single material heat-resistant layer MDO-PE film formula, its formula includes: nucleating agent masterbatch, A group of materials, B group of materials; The number of crystallized nuclei is greatly increased, and the crystallization speed is accelerated, thereby improving the crystallinity of the PE film, ensuring the strength of the PE film, and improving the transparency of the PE film. The weight percentage of group A materials is 60%, and the weight percentage of group B materials is 60%. %, its formula also includes heat-resistant masterbatch and weather-resistant masterbatch.

[0040] In the present invention, group A materials include 98% of high-density polyethylene (HDPE), 5% of polyolefin plastomer, and group B of materials include 98% of high-density polyethylene (HDPE), 10% of polyolefin plastomer, anti-blocking matrix Material 3%, high density polyethylene density 0.964g / cm 3 , melting point 135°C, elongation at brea...

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Abstract

The invention relates to the technical field of packaging materials, and discloses a flexible package single material heat-resistant layer MDO-PE film formula, which comprises a nucleating agent master batch, a group A material and a group B material, the weight percentage of the group A material is 40-60%, the weight percentage of the group B material is 40-50%, and the formula further comprises a heat-resistant master batch and a weather-resistant master batch; the invention further provides a preparation process of the flexible package single-material heat-resistant layer MDO-PE film. The preparation process comprises the following steps: S1, preparing materials; s2, mixing the raw materials. According to the invention, the crystallinity is high, so that the PE film has good heat resistance and cold resistance, the transparency of the PE film is improved, and the film still keeps higher elongation at break after being longitudinally stretched, so that the subsequent bag making requirements are met, and meanwhile, the requirements of high-speed printing of a single-material heat-resistant layer and the aesthetic appearance of a packaging material are met; and meanwhile, the requirements on excellent rigidity and bag making stiffness are met.

Description

technical field [0001] The invention relates to the technical field of packaging materials, in particular to the formulation and preparation process of a single material heat-resistant layer MDO-PE film for flexible packaging. Background technique [0002] At present, the packaging materials for flexible packaging such as coffee, pet food, and shampoo are mainly composite materials, which are mainly composed of layers of different materials such as PET (PA) / PE. These materials have become inseparable and each has different characteristics and melting points. Therefore, it is not suitable for recycling. As the market increasingly seeks to achieve a circular economy by recycling plastic packaging with the highest efficiency, the material must be homogeneous. Currently, all parties are mainly looking for alternatives to PET (PA) , the material first belongs to the polyethylene category, has high heat resistance and adaptability, and the mechanical properties of high strength an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08L23/08C08K3/36C08K7/20C08K5/098C08J5/18B29D7/01
Inventor 刘敏孙宇王华陈建雄
Owner 扬州晟至宝新材料科技有限公司