Low-temperature heat-seal high-separating coating thin film and production method thereof

Abstract

The invention relates to a low-temperature heat-seal high-separating coating thin film. The low-temperature heat-seal high-separating coating thin film comprises a base material, an upper coating layer and a lower coating layer arranged on the upper and lower surfaces of the base material, an upper bottom glue layer arranged between the base material and the upper coating layer and a lower bottom glue layer arranged between the base material thin film and the lower coating layer, wherein the upper coating layer is an acrylic acid coating layer; the lower coating layer is a polyvinylidene chloride (short for PVDC as below) coating layer; the acrylic acid coating layer is a low-temperature heat-seal layer; the PVDC coating layer is a high-separating layer; and during sealing, the acrylic acid coating layer and the PVDC coating layer are sealed in a heating manner, namely sealed in a lapping manner from inside and outside, and the heat-seal strength can reach 3.6N / 15mm. The coating thin film has the advantages of low heat-seal temperature, high heat-seal strength and high separating performance, and is particularly suitable for packaging chewing gum and chocolates sensitive to temperature at high speed.

Description

Technical field

[0001] The invention relates to a low-temperature heat-sealing high-barrier coating film and a manufacturing method thereof, which can be suitable for high-speed packaging of chewing gum, and belongs to the field of new polymer materials. Background technique

[0002] Plastic film is widely used in commodity packaging. For bagged and wrapped plastic packaging, the sealing strength is an important performance index. There are two common sealing forms, a coated film coated with a heat-sealable coating or a composite film composited with a heat-sealable film. Compared with composite films, coated films are becoming more and more popular with customers due to their light weight, good transparency, small film thickness and low cost. At present, acrylic coating is one of the main heat-sealing coating products on the market. Film, its heat-seal strength can reach 3.0N / 15mm, generally starts at 90℃, and reaches the best heat-seal value at 110~120℃. This kind of material ...

Examples

Embodiment 1

[0036] Add 4 kg of acrylic acid monomer, 6 kg of methyl acrylate monomer, 6 kg of ethyl acrylate monomer and 4 kg of demineralized water into the reactor for copolymerization. Slowly heat to 50°C, start the mixer, and stir at the speed of 60 rpm, 20 kg of acrylic emulsion was prepared after 30 minutes. Then add 60 kg of softened water, 10 kg of slip agent, and 10 kg of anti-sticking agent, set the stirring speed to 60 rpm, and stir for 30 minutes to obtain acrylic latex.

[0037] Take 60 kilograms of vinylidene chloride (VDC) monomer, 30 kilograms of acrylic acid monomer, and 10 kilograms of demineralized water, mix them in the reactor for copolymerization, slowly heat to 50°C, start the mixer, and the stirring speed is 60 rpm After 30 minutes, 100 kg of PVDC emulsion was prepared. Take 80 kilograms of the prepared PVDC emulsion, add 13 kilograms of softened water, 5 kilograms of emulsifier, and finally add 2 kilograms of defoamer, turn on the stirring, set the speed to 60 rpm, ...

Embodiment 2

[0041] 12 kg of acrylic acid monomer, 12 kg of methyl acrylate monomer, 12 kg of ethyl acrylate monomer and 4 kg of demineralized water were added to the reaction kettle for copolymerization. The temperature was slowly raised to 45°C and the mixer was started. The stirring speed was 80 revolutions per minute, 40 kg of acrylic emulsion was prepared after 30 minutes. Take 30 kilograms of acrylic emulsion, add 50 kilograms of softened water, 10 kilograms of slip agent, and 10 kilograms of anti-sticking agent, set the stirring speed to 80 rpm, and stir for 30 minutes to prepare acrylic latex.

[0042] Take 65 kilograms of vinylidene chloride (VDC) monomer, 25 kilograms of acrylic acid monomer, and 10 kilograms of demineralized water, mix them in a 50L reactor for copolymerization, slowly heat to 50°C, start the mixer, and stir at 80 rpm. After 30 minutes, 100 kg of PVDC emulsion was prepared. Take 82 kilograms of the prepared PVDC emulsion, add 12 kilograms of softened water, 4 kilo...

Embodiment 3

[0046] 20 kilograms of acrylic monomer, 10 kilograms of methyl acrylate monomer, 10 kilograms of ethyl acrylate monomer and 10 kilograms of demineralized water were added to the reaction kettle for copolymerization. The temperature was slowly raised to 50°C, and the mixer was started. The stirring speed was 100 rpm, 50 kg of acrylic emulsion was prepared after 30 minutes. Take 40 kilograms of acrylic emulsion, add 45 kilograms of softened water, 10 kilograms of slip agent, and 5 kilograms of anti-sticking agent, set the stirring speed to 100 rpm, and stir for 30 minutes to prepare acrylic latex.

[0047] Take 70 kilograms of vinylidene chloride (VDC) monomer, 20 kilograms of acrylic acid monomer, and 10 kilograms of demineralized water, mix them in the reactor for copolymerization, slowly heat to 60°C, start the mixer, and the stirring speed is 100 rpm After 30 minutes, 100 kg of PVDC emulsion was prepared. Take 83 kilograms of the prepared PVDC emulsion, add 12 kilograms of dem...

Technical field

[0001] The invention relates to a low-temperature heat-sealing high-barrier coating film and a manufacturing method thereof, which can be suitable for high-speed packaging of chewing gum, and belongs to the field of new polymer materials. Background technique

[0002] Plastic film is widely used in commodity packaging. For bagged and wrapped plastic packaging, the sealing strength is an important performance index. There are two common sealing forms, a coated film coated with a heat-sealable coating or a composite film composited with a heat-sealable film. Compared with composite films, coated films are becoming more and more popular with customers due to their light weight, good transparency, small film thickness and low cost. At present, acrylic coating is one of the main heat-sealing coating products on the market. Film, its heat-seal strength can reach 3.0N / 15mm, generally starts at 90℃, and reaches the best heat-seal value at 110~120℃. This kind of material ...

Examples

Embodiment 1

[0036] Add 4 kg of acrylic acid monomer, 6 kg of methyl acrylate monomer, 6 kg of ethyl acrylate monomer and 4 kg of demineralized water into the reactor for copolymerization. Slowly heat to 50°C, start the mixer, and stir at the speed of 60 rpm, 20 kg of acrylic emulsion was prepared after 30 minutes. Then add 60 kg of softened water, 10 kg of slip agent, and 10 kg of anti-sticking agent, set the stirring speed to 60 rpm, and stir for 30 minutes to obtain acrylic latex.

[0037] Take 60 kilograms of vinylidene chloride (VDC) monomer, 30 kilograms of acrylic acid monomer, and 10 kilograms of demineralized water, mix them in the reactor for copolymerization, slowly heat to 50°C, start the mixer, and the stirring speed is 60 rpm After 30 minutes, 100 kg of PVDC emulsion was prepared. Take 80 kilograms of the prepared PVDC emulsion, add 13 kilograms of softened water, 5 kilograms of emulsifier, and finally add 2 kilograms of defoamer, turn on the stirring, set the speed to 60 rpm, ...

Embodiment 2

[0041] 12 kg of acrylic acid monomer, 12 kg of methyl acrylate monomer, 12 kg of ethyl acrylate monomer and 4 kg of demineralized water were added to the reaction kettle for copolymerization. The temperature was slowly raised to 45°C and the mixer was started. The stirring speed was 80 revolutions per minute, 40 kg of acrylic emulsion was prepared after 30 minutes. Take 30 kilograms of acrylic emulsion, add 50 kilograms of softened water, 10 kilograms of slip agent, and 10 kilograms of anti-sticking agent, set the stirring speed to 80 rpm, and stir for 30 minutes to prepare acrylic latex.

[0042] Take 65 kilograms of vinylidene chloride (VDC) monomer, 25 kilograms of acrylic acid monomer, and 10 kilograms of demineralized water, mix them in a 50L reactor for copolymerization, slowly heat to 50°C, start the mixer, and stir at 80 rpm. After 30 minutes, 100 kg of PVDC emulsion was prepared. Take 82 kilograms of the prepared PVDC emulsion, add 12 kilograms of softened water, 4 kilo...

Embodiment 3

[0046] 20 kilograms of acrylic monomer, 10 kilograms of methyl acrylate monomer, 10 kilograms of ethyl acrylate monomer and 10 kilograms of demineralized water were added to the reaction kettle for copolymerization. The temperature was slowly raised to 50°C, and the mixer was started. The stirring speed was 100 rpm, 50 kg of acrylic emulsion was prepared after 30 minutes. Take 40 kilograms of acrylic emulsion, add 45 kilograms of softened water, 10 kilograms of slip agent, and 5 kilograms of anti-sticking agent, set the stirring speed to 100 rpm, and stir for 30 minutes to prepare acrylic latex.

[0047] Take 70 kilograms of vinylidene chloride (VDC) monomer, 20 kilograms of acrylic acid monomer, and 10 kilograms of demineralized water, mix them in the reactor for copolymerization, slowly heat to 60°C, start the mixer, and the stirring speed is 100 rpm After 30 minutes, 100 kg of PVDC emulsion was prepared. Take 83 kilograms of the prepared PVDC emulsion, add 12 kilograms of dem...