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PETG/PET co-extrusion self-heat-sealing multilayer film and preparation method thereof

A technology of multi-layer film and heat-sealing layer, applied in the direction of chemical instruments and methods, flat products, layered products, etc., can solve many problems such as

Active Publication Date: 2021-05-28
河南银金达新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are not many studies on the co-extrusion of PET and PETG to prepare high-performance heat-sealing films.

Method used

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  • PETG/PET co-extrusion self-heat-sealing multilayer film and preparation method thereof
  • PETG/PET co-extrusion self-heat-sealing multilayer film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) PET (FG620, Sinopec Yizheng Chemical Fiber), PETG (SKYGREEN® S2008), PA (MXD6), etc. are dried and dehumidified before being melt extruded for use:

[0041] (2) After mixing the raw materials of each layer of the PETG / PET co-extruded self-heat-sealing multi-layer film according to the proportions, they are sent to different extruders for melting and plasticizing, wherein:

[0042] Base layer 1 was prepared from the following raw materials by mass percentage: 16% metallocene PE (5100G, Dow) and 84% PETG (SKYGREEN® S2008);

[0043] Base layer 2 is prepared from the following raw materials by mass percentage: 99.89% PET (FG620, Sinopec Yizheng Chemical Fiber), 0.1% anti-blocking agent silicon dioxide powder and 0.01% slip agent crodamide ER;

[0044] Adhesive layer 1 and adhesive layer 2 are prepared from the following raw materials by mass percentage: 68% maleic anhydride grafted polypropylene (ADMER SE800), 25% PETG (SKYGREEN® S2008) and 7% nano-carbon fibers;

[00...

Embodiment 2

[0051] (1) PET (FG620, Sinopec Yizheng Chemical Fiber), PETG (SKYGREEN® S2008), PA (MXD6), etc. are dried and dehumidified before being melt extruded for use:

[0052] (2) After mixing the raw materials of each layer of the PETG / PET co-extruded self-heat-sealing multi-layer film according to the proportions, they are sent to different extruders for melting and plasticizing, wherein:

[0053] The base layer 1 was prepared from the following raw materials by mass percentage: 10% metallocene PE (5100G, Dow) and 90% PETG (SKYGREEN® S2008);

[0054] Base layer 2 is prepared from the following raw materials by mass percentage: 99.85% PET (FG620, Sinopec Yizheng Chemical Fiber), 0.1% anti-blocking agent silicon dioxide powder and 0.05% slip agent crodamide ER;

[0055] Adhesive layer 1 and adhesive layer 2 are prepared from the following raw materials by mass percentage: 60% maleic anhydride grafted polypropylene (ADMER SE800), 30% PETG (SKYGREEN® S2008) and 10% nano carbon fiber;

...

Embodiment 3

[0062] (1) PET (FG620, Sinopec Yizheng Chemical Fiber), PETG (SKYGREEN® S2008), PA (MXD6), etc. are dried and dehumidified before being melt extruded for use:

[0063] (2) After mixing the raw materials of each layer of the PETG / PET co-extruded self-heat-sealing multi-layer film according to the proportions, they are sent to different extruders for melting and plasticizing, wherein:

[0064] The base layer 1 was prepared from the following raw materials by mass percentage: 20% metallocene PE (5100G, Dow) and 80% PETG (SKYGREEN® S2008);

[0065] The base layer 2 is prepared from the following raw materials by mass percentage: 99.75% PET (FG620, Sinopec Yizheng Chemical Fiber), 0.2% anti-blocking agent silicon dioxide powder and 0.05% slip agent crodamide ER;

[0066] Adhesive layer 1 and adhesive layer 2 are prepared from the following raw materials by mass percentage: 70% maleic anhydride grafted polypropylene (ADMER SE800), 25% PETG (SKYGREEN® S2008) and 5% nano carbon fiber;...

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Abstract

The invention belongs to the field of preparation of heat-sealing films, and particularly relates to a PETG / PET co-extrusion self-heat-sealing multilayer film and a preparation method thereof. The PETG / PET co-extrusion self-heat-sealing multilayer film provided by the invention comprises five film layers which sequentially comprise a base layer 1, a bonding layer 1, a barrier layer, a bonding layer 2 and a base layer 2, wherein the base layer 1 is a heat sealing layer and comprises metallocene PE and PETG; the base layer 2 is a lower surface layer and comprises PET, an anti-blocking agent and a slipping agent; the bonding layer 1 and the bonding layer 2 are the same in component and comprise maleic anhydride grafted polypropylene, PETG and carbon nanofibers; and the barrier layer is a middle layer and comprises PA and PETG. The film has the advantages of high heat sealing strength, moderate heat sealing temperature, improved toughness, improved elongation at break, improved interlayer peel strength and the like, and can be applied to the field of food packaging and the like.

Description

technical field [0001] The invention belongs to the field of preparation of heat-sealing films, in particular to a PETG / PET co-extrusion self-heat-sealing multilayer film and a preparation method thereof. Background technique [0002] Polyethylene terephthalate (PET) is a common thermoplastic resin. It is a milky white or light yellow highly crystalline polymer with a smooth and shiny surface. ℃, flame retardant, the ignition point is 480℃, and the cracking temperature is 420℃. PET has good mechanical and optical properties, high tensile strength, good rigidity, tensile bending resistance, high dimensional stability, gloss and transparency, and has high resistance to gases (oxygen and carbon dioxide) and water vapor. Good barrier properties, commonly used in packaging food, refined alcohol, carbonated beverages, non-carbonated beverages and cosmetics, etc. In addition, PET has good wear resistance, weather resistance, creep resistance and wear resistance. Good acid and sol...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/20B32B27/32B32B27/34B32B27/36C08J5/18C08L67/02C08L23/06C08L51/06C08L77/00C08K7/06C08K3/04C08K3/36C08K3/34C08K5/20B32B7/12B65D65/40
CPCB32B27/08B32B27/327B32B27/36B32B27/20B32B27/32B32B7/12B32B27/34C08J5/18B29D7/01B65D65/40C08J2367/02C08J2423/06C08J2451/06C08J2467/02C08J2377/00C08K2201/011C08K7/06C08K3/046C08K3/04C08K3/36C08K3/34C08K3/346C08K5/20B32B2250/24B32B2250/05B32B2307/31B32B2307/558B32B2307/7244B32B2307/7242B32B2307/7246Y02W30/80
Inventor 张启纲李沅鸿李国庆王威威
Owner 河南银金达新材料股份有限公司
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