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Low-temperature heat sealing coating film suitable for lightweight packaging, and manufacturing method thereof

A low-temperature heat-sealing and coating film technology, used in coatings, polyurea/polyurethane coatings, etc., can solve the problems of increasing the total thickness of the packaging film, high heat-sealing strength, and difficulty for consumers to open the packaging, and achieves a guaranteed low-temperature heat. The effect of sealing performance, improving printing performance and good film quality

Active Publication Date: 2018-06-15
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of this structure has the following disadvantages: 1. The greatly increased total thickness of the packaging film not only causes waste of raw materials, but also greatly increases the cost of the enterprise; 2. Due to the high heat sealing strength of CPP and PE, it is difficult for consumers to When opening the package, the consumer experience is poor; 3. CPP and PE generally have heat sealing effects when the heat sealing temperature is >100°C
At 65-70°C, the heat-sealing strength reaches 2.5-3.0N / 15mm, and the film roll is prone to stickiness during production, which makes it unusable for subsequent packaging, and the coating film has poor adhesion to ink. Easy to cause ink to fall off

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pour 23kg sarin resin, 5kg acrylic resin, 1kg propylene glycol monolaurate and alkyl sulfate compound emulsifier, 70.4kg demineralized water into the reaction kettle, pressurize to 1Mpa with nitrogen gas, stir and heat to 90°C After the emulsification is uniform, add 0.1kg defoamer and 0.5kgPH regulator and stir evenly, discharge the material, cool down to room temperature, add 36.36kg demineralized water, 4.54kg silicon dioxide anti-sticking agent, 10.60kg palm wax smoothing agent, and stir evenly , make LTS latex, stand-by.

[0032] 2. Preparation of AC Latex

[0033] Add 72kg of commercially available AC emulsion, 9kg of aziridine cross-linking agent, 1kg of defoamer, and 18kg of demineralized water into the reactor, stir to raise the temperature to 50°C, stir for 2 hours, discharge, cool to room temperature, and add 6.59kg of smoothing agent , 3.29kg of silicon dioxide anti-adhesive agent was stirred evenly to obtain AC latex, which was set aside.

[0034] 3. Mach...

Embodiment 2

[0038]Pour 21kg sarin resin, 3kg acrylic resin, 2kg propylene glycol monolaurate and alkyl sulfate compound emulsifier, 73.3kg demineralized water into the reaction kettle, pressurize to 1Mpa with nitrogen gas, stir and heat to 95°C After the emulsification is uniform, add 0.2kg defoamer and 0.5kgPH regulator and stir evenly, discharge the material, cool down to normal temperature, add 50kg demineralized water, 3.33kg silicon dioxide anti-sticking agent, 13.33kg palm wax smoothing agent, stir evenly, LTS latex was prepared and set aside.

[0039] 2. Preparation of AC Latex

[0040] Add 70kg of commercially available AC emulsion, 15kg of aziridine crosslinking agent, 2kg of defoamer, and 13kg of demineralized water into the reaction kettle, stir to raise the temperature to 50°C, stir for 2 hours, discharge, cool to room temperature, and add 7.77kg of smoothing agent , 3.33kg of silicon dioxide anti-adhesive agent was stirred evenly to obtain AC latex, which was set aside.

[...

Embodiment 3

[0045] Pour 20kg sarin resin, 2kg acrylic resin, 1.3kg propylene glycol monolaurate and alkyl sulfate compound emulsifier, 75kg demineralized water into the reaction kettle, pressurize to 1Mpa with nitrogen gas, stir and heat to 90°C After the emulsification is uniform, add 0.2kg defoamer and 1.5kgPH regulator and stir evenly, discharge the material, cool down to room temperature, add 23.6kg demineralized water, 1.38kg silicon dioxide anti-sticking agent, 13.88kg palm wax smoothing agent, and stir evenly , make LTS latex, stand-by.

[0046] 2. Preparation of AC Latex

[0047] Add 74kg of commercially available AC emulsion, 8kg of aziridine cross-linking agent, 1kg of defoamer, and 17kg of demineralized water into the reaction kettle, stir to raise the temperature to 50°C, stir for 2 hours, discharge the material, cool to room temperature, and add 7.60kg of smoothing agent , 1.08kg of silicon dioxide anti-adhesive agent was stirred evenly to obtain AC latex, which was set asid...

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Abstract

The invention relates to a low-temperature heat sealing coating film suitable for lightweight packaging. The coating film is a double-sided coating structure, and comprises a substrate, an upper coating layer on the upper surface of the substrate, a lower coating layer at the lower surface of the substrate, an upper primer layer between the substrate and the upper coating layer, and a lower primerlayer between the substrate and the lower coating layer, the upper primer layer and the lower primer layer are coatings layers formed by water-based polyurethane in the prior art, the substrate is abiaxially-oriented polypropylene film, the upper coating layer is a low-temperature heat sealing coating layer, and the lower coating layer is an acrylic coating layer; and the acrylic coating layer is a printed layer, the low-temperature heat sealing layer and the low-temperature heat sealing layer are heat-sealed during sealing, and the heat seal strength at 70 DEG C is 1.0-1.5 N / 15 mm. The low-temperature heat sealing coating film has the advantage of good film rolling quality, no sticky phenomenon, good printing performance, implementation of packaging without compounding, and meeting requirements of high-speed packaging, and is especially for lightweight (less than 100 g) packaging of heat-sensitive foods.

Description

technical field [0001] The invention relates to a low-temperature heat-sealing coating film suitable for light-weight packaging, which belongs to the field of new polymer materials. Background technique [0002] With the development of the packaging industry and the progress of society, the requirements for food packaging are getting higher and higher. General packaging requires heat sealing and printing. The traditional packaging film is printed on the functional film layer, and then compounded with a film with a heat-sealing effect such as CPP and PE on the printed layer to achieve the sealing effect. The use of this structure has the following disadvantages: 1. The greatly increased total thickness of the packaging film not only causes waste of raw materials, but also greatly increases the cost of the enterprise; 2. Due to the high heat sealing strength of CPP and PE, it is difficult for consumers to When opening the package, the consumer experience is poor; 3. CPP and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J7/04C09D175/04C09D123/08C09D133/00C09D7/61C09D7/63C09D7/65C08L23/12
CPCC08J7/042C08J2323/12C08J2423/08C08J2433/00C08J2475/04C08J2491/06C08K3/36C08K5/3412
Inventor 朱海赵洁
Owner HAINAN SHINER IND
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