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Low-cost eco-friendly polyester film for twist packaging and preparation method of polyester film

An environmentally-friendly polyester film technology, applied in the field of polyester film, can solve the problems of high cost and non-environmental protection of twisted packaging films, and achieve the effects of reducing production costs, improving kink resistance, and maintaining hygiene

Active Publication Date: 2016-09-28
SHANDONG FENGHUA PLASTIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the disadvantages of high cost or non-environmental protection of existing kink packaging films, the present invention provides a polyester film for biaxially stretched kink packaging with low cost and environmental protection features and its preparation method

Method used

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  • Low-cost eco-friendly polyester film for twist packaging and preparation method of polyester film
  • Low-cost eco-friendly polyester film for twist packaging and preparation method of polyester film
  • Low-cost eco-friendly polyester film for twist packaging and preparation method of polyester film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1. A low-cost, environment-friendly polyester film for twisted packaging with a thickness of 23 microns is prepared by three-layer co-extruded biaxially stretched production equipment at a production speed of 200 m / min. It consists of upper and lower surface layers and a core layer.

[0033] The thickness of the core layer is 20um, 20% bright polyester chips, 80% recycled polyester chips, the thickness of both surface layers is 1.5um, 70% bright polyester chips, 30% silicon-containing polyester chips ( Silica concentration 3000ppm, particle size 3.9um).

[0034] The production process of this example mainly includes the following steps:

[0035] A. Preparation of the core layer: Fluidize the proportioned core layer polyester slices through a fluidized bed at a temperature of 170°C for 15-20 minutes into a drying tower, and dry them at a temperature of 160°C for 4-5 hours in the drying tower to obtain Dry raw materials; the dry raw materials are heated into a...

Embodiment 2

[0049] Embodiment 2, a low-cost environmentally friendly polyester film for twisted packaging with a thickness of 20 microns is prepared by three-layer co-extruded biaxially stretched production equipment, and the production speed is 230m / min. It consists of upper and lower surface layers and a core layer.

[0050] The thickness of the core layer is 17um, 25% bright polyester chips, 75% recycled chips; the thickness of the two surface layers is 1.5um, 70% bright polyester chips, 30% silicon-containing polyester chips (dioxide Silicon concentration 3000ppm, particle size 3.9um).

[0051] The production process of this example mainly includes the following steps:

[0052] A. Preparation of the core layer: Fluidize the well-proportioned core layer raw materials through a fluidized bed at a temperature of 170°C for 15-20 minutes into a drying tower, and dry them in a drying tower at a temperature of 160°C for 4-5 hours to obtain dried raw materials The dry raw material is heated ...

Embodiment 3

[0066] Example 3: A low-cost, environment-friendly polyester film for twisted packaging with a thickness of 18 microns is prepared using three-layer co-extruded biaxially stretched production equipment at a production speed of 250 m / min. It consists of upper and lower surface layers and a core layer.

[0067] The thickness of the core layer is 15um, 30% bright slices, 70% recycled slices; the thickness of the two surface layers is 1.5um, 70% bright polyester slices, 30% silicon-containing polyester slices (silicon dioxide concentration 3000ppm, particle size 3.9um).

[0068] The production process of this example mainly includes the following steps:

[0069] A. Preparation of the core layer: Fluidize the well-proportioned core layer raw materials through a fluidized bed at a temperature of 170°C for 15-20 minutes into a drying tower, and dry them in a drying tower at a temperature of 160°C for 4-5 hours to obtain dried raw materials The dry raw material is heated into a molte...

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Abstract

The invention discloses a low-cost eco-friendly polyester film for twist packaging and a preparation method of the polyester film. The film comprises an upper and lower surface layers and a core layer. The core layer is composed of 20-30% of bright polyester chips and 70-80% of recovery chips. Each of the upper and lower surface layers is composed of 70% of bright polyester chips and 30% of silicon-contained chips. The core layer adopts PET recovery chips which are low in price and are clean. Meanwhile, longitudinal and transverse stretch technology is used for adjustment. Mainly, the longitudinal stretch ratio is reduced to 2.8-3.2, and the transverse stretch ratio is reduced to 3.5-3.7. A special low-temperature setting process is carried out at 80-120 DEG C to further reduce crystallization tendency of the film, so that the degree of crystallinity of the film can be controlled and the twist ability of the film is improved. A twist film having a resilience angle less than 45 degrees when rotated at 540 degrees, and the cost is reduced by about 40%.

Description

technical field [0001] The invention relates to the technical field of polyester film, in particular to a low-cost and environment-friendly polyester film for kink packaging, and also relates to a preparation method of the polyester film. Background technique [0002] Plastic film is one of the earliest application products in the polymer material industry. In recent years, with the development of petrochemical and plastic processing industries, the production and application of plastic film have developed rapidly, including agriculture, industry, packaging, electronics, Electrical appliances, construction, energy, national defense and other fields, among which the most widely used in the packaging field. [0003] In terms of materials: plastic films include PVC, PE, PP, PET (polyester film), PA, etc.; in terms of processing methods, there are methods such as salivation, calendering, blow molding, and biaxial stretching. [0004] Kink packaging is one of the most traditiona...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/20B32B9/04B32B27/36B32B27/14
CPCB32B9/048B32B27/14B32B27/20B32B27/36
Inventor 董福起葛晓松代汝兴袁爱雷陈德兴
Owner SHANDONG FENGHUA PLASTIC TECH CO LTD
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