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Polyester packaging film having parallel openings and manufacture method of polyester packaging film

A technology of parallel opening and packaging film, which is applied in the field of polyester film, can solve the problems of not being easy to tear, and achieve the effects of reducing track retraction rate, improving transverse orientation degree, and reducing longitudinal stretch ratio

Active Publication Date: 2017-01-04
SHANDONG FENGHUA PLASTIC TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the shortcomings of the existing biaxially stretched polyester film that is not easy to tear and the tear line is oblique, the present invention provides an easy-to-tear polyester packaging film with parallel openings and a production method thereof by optimizing the formula and improving the process

Method used

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  • Polyester packaging film having parallel openings and manufacture method of polyester packaging film
  • Polyester packaging film having parallel openings and manufacture method of polyester packaging film
  • Polyester packaging film having parallel openings and manufacture method of polyester packaging film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1. A parallel opening polyester packaging film with a thickness of 12um is prepared by three-layer co-extruded biaxially stretched production equipment at a production speed of 240m / min. It consists of upper and lower surface layers and a core layer.

[0022] The thickness of the core layer is 9um, 80% fresh bright polyester chips and 20% recycled chips; the thickness of both surface layers is 1.5um, 50% fresh bright polyester chips, 50% fresh silicon-containing polyester chips (Silicon dioxide concentration: 3000ppm, particle size 3.5um).

[0023] The production process of this example mainly includes the following steps:

[0024] A. Preparation of the core layer: Mix the fresh bright polyester chips and recycled chips of the core layer with a good ratio, pass through the fluidized bed at a temperature of 170°C for 15-20 minutes and enter the drying tower, and in the drying tower at a temperature of 160°C Drying at temperature for 4-5 hours to obtain dry ra...

Embodiment 2

[0033] Example 2: A parallel opening polyester packaging film with a thickness of 19um is prepared by three-layer co-extruded biaxially stretched production equipment at a production speed of 200m / min, consisting of upper and lower surface layers and a core layer.

[0034] The thickness of the core layer is 15um, 75% fresh bright polyester chips and 25% recycled chips; the thickness of both surface layers is 2um, 55% fresh bright polyester chips, 45% fresh silicon-containing polyester chips ( Silica concentration: 3000ppm, particle size 3.5um).

[0035] The production process of this example mainly includes the following steps:

[0036] B. Preparation of the core layer: mix the fresh bright polyester chips and recycled chips of the core layer with a good ratio, pass through the fluidized bed at a temperature of 170°C for 15-20 minutes and enter the drying tower, and in the drying tower at a temperature of 160°C Drying at temperature for 4-5 hours to obtain dry raw materials; ...

Embodiment 3

[0045] Example 3: A parallel opening polyester packaging film with a thickness of 26um is prepared by three-layer co-extruded biaxially stretched production equipment at a production speed of 160m / min, consisting of upper and lower surface layers and a core layer.

[0046] The thickness of the core layer is 21um, 70% fresh bright polyester chips and 30% recycled chips; the thickness of both surface layers is 2.5um, 60% fresh bright polyester chips, 40% fresh silicon-containing polyester chips (Silicon dioxide concentration: 3000ppm, particle size 3.5um).

[0047] The production process of this example mainly includes the following steps:

[0048] C. Preparation of the core layer: Mix the fresh bright polyester chips and recycled chips of the core layer with a good ratio, pass through the fluidized bed at a temperature of 170°C for 15-20 minutes and enter the drying tower, and in the drying tower at a temperature of 160°C Drying at temperature for 4-5 hours to obtain dry raw m...

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Abstract

The invention discloses a polyester packaging film having parallel openings and a manufacture method of the polyester packaging film. The film comprises upper and lower surface layers and a core layer. The core layer includes 70-80% of fresh bright polyester slices and 20-30% of recycled slices. Each of the upper and lower surface layers includes 50-60% of fresh bright polyester slices and 40-50% of fresh silicon-containing slices. Conventional technology of a bi-axially-oriented polyester film is greatly improved, so that during tension, molecular chains are oriented in a longitudinal direction as little as possible and oriented in a horizontal direction as much as possible. During fixing, the oriented molecular chains are disoriented in a longitudinal direction as much as possible and kept in horizontal orientation. The studied polyester packaging film having parallel openings and capable of being easily torn in a longitudinal direction can be applied to packaging fields of a medicine, a food and medical equipment.

Description

technical field [0001] The invention relates to the technical field of polyester film, in particular to a polyester packaging film with parallel openings, and also relates to a preparation method of the packaging film. Background technique [0002] Biaxially oriented polyester film has the characteristics of high strength, good rigidity, transparency, high gloss, odorless, tasteless, colorless, non-toxic, oil resistance, anti-aging, chemical corrosion resistance, good insulation, etc., and is widely used in agriculture , industry, packaging, electronics, electrical appliances, construction, decoration, energy, defense and other fields. [0003] Ordinary biaxially oriented polyester film has a relatively balanced longitudinal and transverse stretch ratio, is not easy to tear, and is even less likely to be torn along a straight line. No matter whether it is torn along the longitudinal or transverse direction, it will go in a diagonal direction, and it is easy to spill the pack...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/36B32B37/15B29D7/01
CPCB29D7/01B32B27/36B32B37/153B32B2250/03B32B2250/244
Inventor 仲崇文葛晓松董福起代汝兴
Owner SHANDONG FENGHUA PLASTIC TECH CO LTD
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