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Microwave heatable bowl cover film with good planeness and preparation method thereof

A microwave heating and flatness technology, applied in chemical instruments and methods, sustainable manufacturing/processing, flexible coverings, etc. Heat sealing performance, good stiffness effect

Inactive Publication Date: 2012-06-27
JIANGYIN BAOBO PACKING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most instant noodles are oily, so they have high requirements on moisture resistance and oxygen resistance. The existing packaging of instant noodles mainly includes bowls and bags, and the common bowl covers on the market currently use PAPER / AL / SPE, PAPER The structure of / LDPE / AL / HSL and PET / PAPER / AL / PE is prone to the following problems: (1) It is easy to be torn when the cover is torn off, the paper layer in the cover film is separated from the aluminum layer, and the cover film is fragmented It will remain on the instant noodle bucket; (2) These structures all contain aluminum foil layers, because microwaves have a reflection effect on metal materials, so this structure cannot be used for microwave heating
In order to meet the fast-paced life requirements of modern people, so that instant noodles can also be heated in a microwave oven, it is necessary to make the instant noodle cover film without an aluminum layer, but due to the different thermal shrinkage rates between the materials of each layer, this cover without aluminum layer structure The film is prone to bending, and the processing of instant noodles is mostly a mechanical suction cover, which requires high flatness of the cover film.

Method used

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  • Microwave heatable bowl cover film with good planeness and preparation method thereof
  • Microwave heatable bowl cover film with good planeness and preparation method thereof
  • Microwave heatable bowl cover film with good planeness and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] a. Polyethylene terephthalate (PET) layer printing process: at 50°C, color printing the PET film to form a PET printing film;

[0043] b. The preparation process of the composite polyethylene-vinyl acetate (PE-EVA) layer: each layer of polyethylene resin and ethylene-vinyl acetate resin are placed in their respective barrels according to the proportions, and after being extruded by an extruder, Make composite polyethylene-vinyl acetate film.

[0044] c. Dry lamination: Glue the PET printed film that has been printed with patterns and text, and lamination with PAPER90G through a dry lamination machine. The glue used is polyurethane glue, and the operating concentration of the adhesive is controlled at No. 3 Zahn Cup 16-17 Seconds, the coating amount is 2.5-3.3gsm, the composite tension is controlled at 28%, and the humidity is adjusted at 40%-50%.

[0045] d. Extrusion compounding: PE is extruded between the paper surface of the PET / INK / PAPER semi-finished product and the PE-E...

Embodiment 2

[0049] Except c. Dry compounding: the compound tension is controlled at 40%; d. Extrusion compounding: the second PE tension setting is 0.1kgf. The rest is the same as in Example 1.

Embodiment 3

[0050] Example 3: In addition to c, dry compounding: the compounding tension is controlled at 35%; d, extrusion compounding: the second PE tension is set to 0.3kgf. The rest is the same as in Example 1.

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Abstract

The invention relates to a microwave heatable bowl cover film with good planeness and a preparation method thereof. The bowl cover film comprises, from top to bottom, an external layer, an intermediate layer and a heat sealing layer; the external layer is a PET (polyethylene terephthalate) film surface layer; the intermediate layer is a double gummed paper layer; the heat sealing layer which is a composite polyethylene-vinyl acetate film is obtained by coextruding a composite layer, a core layer and a sealing layer from top to bottom, materials of the composite layer and the core layer are formed by mixing low density polyethylene and linear low density polyethylene according to a weight ratio of 3:2, and the material of the sealing layer is ethylene-vinyl acetate; the PET film surface layer and the double gummed paper layer are composited together by a polyurethane adhesive layer; and the double gummed paper layer and the composite polyethylene-vinyl acetate film are composited together by a casting polyethylene layer. The bowl cover film prepared in the invention, which has a good planeness, can be heated by microwaves.

Description

Technical field [0001] The invention relates to a bowl cover film with good flatness and microwave heating and a preparation method thereof, which are mainly used for various kinds of instant noodles and instant rice bowl cover films, and belong to the technical field of food packaging composite materials and preparation methods thereof. Background technique [0002] With the development of the market, convenient fast food is becoming more and more popular among people, and instant noodles are one of them. Most instant noodles contain oily properties, so their moisture barrier and oxygen barrier properties are extremely high. The existing instant noodle packaging mainly includes bowls and bags, while the common bowl cover films on the market mostly use PAPER / AL / SPE, PAPER The structure of / LDPE / AL / HSL and PET / PAPER / AL / PE is prone to the following problems: (1) It is easy to be torn when the cover is torn, the paper layer in the cover film is separated from the aluminum layer, and...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/30B32B27/32B32B27/36B32B7/12B32B37/12B65D65/40
CPCY02A40/90Y02W90/10
Inventor 章辉陆锦霞孙永庆姚雾红李全布
Owner JIANGYIN BAOBO PACKING
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