Cpp cast film, composite film, preparation method of composite film and tin-plated sheet

A technology of casting compound and casting film, applied in the field of packaging, can solve the problems of difficult printing with special appearance, high loss of printing iron, increase the cost of printing iron, etc., and achieve good corona treatment, high temperature resistance and high temperature resistance. Good, good shear resistance effect

Active Publication Date: 2022-07-05
HUANGSHAN NOVEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The printing of tin-plated sheet cans (commonly known as "iron printing") is realized by offset printing using the principle of "oil-water incompatibility". Such as laser effects, matting and bright graphic effects on the same page, etc., if these special printing effects are to be realized, the cost of iron printing will be greatly increased. At the same time, the loss of iron printing is high, and the cost of recycling and processing of iron printing products with large ink volume and coating will also increase.

Method used

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  • Cpp cast film, composite film, preparation method of composite film and tin-plated sheet
  • Cpp cast film, composite film, preparation method of composite film and tin-plated sheet
  • Cpp cast film, composite film, preparation method of composite film and tin-plated sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] S1, prepare the materials contained in the composite layer, the intermediate layer and the heat-sealing layer of the CPP cast film as described in Table 2 below and weigh each component, wherein the specific ratios of the three components in the heat-sealing layer are as follows in Table 2 shown;

[0048] S2. Add the components of the composite layer, the intermediate layer and the heat-sealing layer into the multi-layer co-extrusion casting machine respectively, and obtain CPP streams with different resin ratios in the heat-sealing layer by means of three-layer co-extrusion molding. Extend film 1-6;

[0049] Table 2 Composition of composite layer, intermediate layer and heat-sealing layer of CPP cast film

[0050]

[0051] In the prepared CPP cast films 1-6, the heat-sealing layer resin ratio is shown in Table 3 below:

[0052] Table 3 Ratio of resin for heat sealing layer in CPP cast film 1-6

[0053] sample 18722—PP(%) OE850—PE(%) ABPP10S(%) ...

Embodiment 2

[0055] S1. Print ink on the printing film by gravure printing, the printing speed is 220-250m / min, and the ink is dried and cured at 65-80 ° C to form an ink layer;

[0056] Using dry compounding or solvent-free compounding method, the glue is evenly coated on the ink layer of the printing film with a glue roller, and the amount of glue is 4.5-5.5gsm to form an adhesive layer;

[0057] S2. The ordinary film 1 prepared in the comparative example 1 and the printed film are heated and laminated together by a laminating roller, the compounding temperature is 70-90 ° C, and the pressure is 0.2-0.4 MPa, wherein the adhesive layer of the ordinary film and the printing film is Connected, aged for 48-72 hours at a temperature of 45-55°C, and cooled at room temperature for more than 24 hours to obtain an ordinary composite film 1, and the printing effect of the ordinary composite film 1 was tested;

[0058] The CPP cast films 1-6 prepared in Example 1 were heated and pressed together wi...

Embodiment 3

[0061] The ordinary composite film 1 prepared in Example 2 was heat-sealed and pressed with a tin-plated sheet at 120°C, 130°C, 140°C, 150°C, 160°C, 170°C, and 180°C, respectively, and the hot-pressed The tin-plated sheet is tested for heat sealing performance, and the strength values ​​of heat sealing performance are shown in Table 4 below;

[0062] The CPP cast composite films 1-6 prepared in Example 2 were heat-sealed and pressed with a tin-plated sheet at 120 °C, 130 °C, 140 °C, 150 °C, 160 °C, 170 °C, and 180 °C, respectively, and The tin-plated sheet after hot pressing is tested for heat sealing performance. The strength values ​​of heat sealing performance are shown in Table 4 below. The curve of heat sealing performance with temperature is as follows: Figure 4 shown;

[0063] Table 4 Heat sealing properties of composite film and tin-plated sheet at different temperatures (unit: N / 15mm)

[0064]

[0065] Note: The bold part in the table is the strength that meets ...

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Abstract

The invention provides a CPP cast film, a CPP cast composite film, a preparation method of the CPP cast composite film, and a tin-plated sheet heated and pressed by the CPP cast composite film, belonging to the technical field of packaging. The CPP cast film is made of a composite layer, an intermediate layer and a heat-sealing layer through a three-layer co-extrusion casting process; the printing film is printed with gravure printing ink and uniformly glued, and then heated and pressed by a laminating roller to seal the film. The CPP cast film is compounded with the printed film to obtain a composite film containing the CPP cast film. The composite film can be heat-sealed and pressed with a tin-plated sheet at 130-180°C, and the adhesive strength is greater than 5N / 15mm. The composite film is beautifully printed, and the lamination is easy to operate. It is suitable for canning and reprocessing, and is discarded by packaging. The separation and recycling of materials brings a new display effect to the iron-filled packaging. The composite product can be easily formed into cans, and the recycling and disposal of the packaging waste cans is more convenient.

Description

technical field [0001] The present invention relates to the technical field of packaging, in particular to a CPP cast film, a CPP cast composite film, a preparation method of the CPP cast composite film, and a tin-plated sheet hot-pressed with the CPP cast composite film. Background technique [0002] Tin-plated sheet is commonly known as "tinplate". Because of its corrosion resistance, high light barrier, non-toxicity, and no odor, this material can well protect the items stored in it, such as reducing the loss of nutrients in food; blocking water vapor , the entry of oxygen to extend the shelf life of food and so on. From the perspective of environmentally friendly packaging, tin-plated sheet is a low-pollution, recyclable material. Tin-plated sheet has good ductility and can be formed into cans. Therefore, tin-plated sheet cans and packaging containers have been widely used in food packaging, daily chemical packaging, pharmaceutical packaging, industrial product packagi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B32B27/32B32B7/12B32B37/10B32B37/06B32B37/12B41M1/10
CPCB32B27/32B32B7/12B32B37/10B32B37/06B32B37/12B41M1/10Y02W30/80
Inventor 张和平潘健汪学文陈旭张红斌
Owner HUANGSHAN NOVEL
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