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Low-temperature hot-sealed coating film and manufacturing method thereof

A low-temperature heat-sealing and film-coating technology, which is applied in the direction of liquid-coating devices, coatings, and pre-treated surfaces, can solve the problems of low sealing temperature, high sealing temperature, and low heat-sealing strength. Achieve the effects of increasing the glass transition temperature, avoiding coating anti-sticking, and simple manufacturing process

Active Publication Date: 2018-06-19
HAINAN SHINER IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of high sealing temperature and low heat sealing strength in the existing coating film packaging, and provide a low-temperature heat-sealing coating film with low sealing temperature for heat-sensitive food packaging and its manufacturing method

Method used

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  • Low-temperature hot-sealed coating film and manufacturing method thereof
  • Low-temperature hot-sealed coating film and manufacturing method thereof
  • Low-temperature hot-sealed coating film and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of low-temperature heat-sealing coating

[0024]

[0025] 1. Preparation of raw materials:

[0026] (1), first add 4kg of soft water in the batching tank, then add the weighed initiator, start stirring to fully dissolve and mix, and make a mixed initiator solution;

[0027] (2), first add 8kg of soft water into the batching tank, then add the weighed emulsifier, start stirring to fully dissolve and mix, and make an emulsifier solution;

[0028] (3) First add 28kg of soft water to the reactor, then add the weighed EAA copolymer and amino resin, close the inlet and outlet valves of the reactor, and turn on the vacuum pump to evacuate the reactor. When the pressure reaches -0.08 MPa and then pass nitrogen gas inside, and replace 3 times by vacuuming→adding nitrogen→vacuumizing to empty the oxygen in the reactor.

[0029] 2. Coating emulsification reaction:

[0030] Turn the stirring speed of the reactor to 1500r / min, and turn on the heating. When the ...

Embodiment 2

[0034] (1) Preparation of low-temperature heat-sealing coating

[0035]

[0036] 1. Preparation of raw materials:

[0037] (1), first add 5.625kg of soft water in the batching tank, then add the weighed initiator, start stirring and fully dissolve and mix to make a mixed initiator solution;

[0038] (2), first add 11.25kg of soft water in the batching tank, then add the weighed emulsifier, start stirring to fully dissolve and mix, and make an emulsifier solution;

[0039] (3) First add 39.375kg of soft water into the reactor, then add the weighed EAA copolymer and amino resin, close the inlet and outlet valves of the reactor, and turn on the vacuum pump to evacuate the reactor, when the pressure reaches- After 0.08MPa, nitrogen gas is passed inside, and the oxygen in the reactor is evacuated by vacuuming→adding nitrogen→vacuumizing for 3 times.

[0040] 2. Coating emulsification reaction:

[0041] Turn on the stirring speed of the reactor to 2000r / min, and turn on the he...

Embodiment 3

[0045] (1) Preparation of low-temperature heat-sealing coating

[0046]

[0047] 1. Preparation of raw materials:

[0048] (1), first add 9.5kg of soft water in the batching tank, then add the weighed initiator, start stirring to fully dissolve and mix, and make a mixed initiator solution;

[0049] (2), first add 19kg of soft water in the batching tank, then add the weighed emulsifier, start stirring to fully dissolve and mix, and make an emulsifier solution;

[0050] (3) First add 66.5kg of soft water into the reactor, then add the weighed EAA copolymer and amino resin, close the inlet and outlet valves of the reactor, turn on the vacuum pump to vacuum the reactor, when the pressure reaches- After 0.08MPa, nitrogen gas is passed inside, and the oxygen in the reactor is evacuated by vacuuming→adding nitrogen→vacuumizing for 3 times.

[0051] 2. Coating emulsification reaction:

[0052] Turn the stirring speed of the reactor to 1600r / min, and turn on the heating. When the...

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Abstract

The invention relates to a low-temperature hot-sealed coating film and a manufacturing method thereof. The coating film comprises a base material, and a paint layer on the surface of the base material; a bottom glue layer is arranged between the paint layer and the base material, and is a coating layer formed by drying water polyurethane paint; the paint layer is the coating layer formed after drying of low-temperature hot sealing paint which is prepared through polymerization and emulsification and coated on the bottom glue layer through a coating process; the low-temperature hot sealing paint is prepared by the following raw materials in percentage by weight: 75-80% of soft water, 12-17% of ethylene-acrylic copolymer, 4-8% of amino resin, 2-5% of emulsifying agent, 0.5-2% of initiator, 0.3-1% of defoaming agent, and 0.1-0.3% of pH adjusting agent; the base material is a BOPP film with a thickness of 20-35 microns; when the sealing temperature of the coating film is low, the hot sealing strength at 70 DEG C is not lower than 3 N / 15 mm; and the manufacturing process is simple.

Description

technical field [0001] The invention relates to a low-temperature heat-sealing coating film and a manufacturing method thereof, which belongs to the field of new polymer materials and is suitable for packaging heat-sensitive foods such as chocolate and chewing gum. Background technique [0002] As a kind of very fragile food, chocolate and chewing gum have high requirements on packaging materials, and their packaging films must have low-temperature heat-sealing performance (heat-sealing strength at 70°C ≥ 3N / 15mm). At present, the existing chocolate packaging mainly uses aluminum-plated or aluminum foil composite biaxially oriented polypropylene film (hereinafter referred to as BOPP film), and realizes low-temperature sealing by coating hot melt adhesive. Although this type of composite film can meet the requirements of chocolate packaging, there are certain defects. Due to the use of aluminum foil or foil plating, it is characterized by poor folding resistance, poor tear r...

Claims

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Application Information

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IPC IPC(8): B05D7/04B05D3/14B05D7/00
Inventor 黄宏存袁业兴
Owner HAINAN SHINER IND
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