Double-sided heat-sealing matt film and preparation method thereof

Abstract

The invention discloses a double-sided heat-sealing matt film which is sequentially composed of an upper surface layer, a core layer and a lower surface layer. The upper surface layer is prepared from the following raw materials in parts by mass: 44-50 parts of polypropylene, 35-40 parts of high-density polyethylene, 25-30 parts of an ethylene-1-octylene copolymer, 5-8 parts of matting powder and 1-3 parts of lanthanum-doped nano silicon dioxide. The invention also discloses a preparation method of the double-sided heat-sealing matt film. The double-sided heat-sealing matt film disclosed by the invention has excellent matting performance and heat-sealing performance, and has a good application prospect in the field of food packaging.

Description

technical field

[0001] The invention relates to the technical field of films, in particular to a double-sided heat-sealing matte film and a preparation method thereof. Background technique

[0002] Heat-sealing film refers to a plastic film for heat-sealing, of which double-sided heat-sealing film is mainly used for the outer packaging of food, mainly including quick-frozen food packaging, retort food packaging, fast food packaging and snack beverage packaging. With the continuous improvement of people's aesthetics, ordinary light film packaging has been unable to attract the attention of customers. The packaging film with low gloss and high haze into diffuse reflection and matting effect is more and more popular. Therefore, a dual-layer packaging film has been developed. Surface heat-sealing matting film has broad prospects. The heat sealing film must have the following important properties: low heat sealing starting temperature, good cold and heat resistance, high heat se...

Examples

Embodiment 1

[0023] A double-sided heat-sealing matte film is composed of an upper surface layer, a core layer and a lower surface layer in sequence;

[0024] The upper surface layer is made of the following raw materials by mass: 44 parts of polypropylene, 35 parts of high-density polyethylene, 25 parts of ethylene-1-octene copolymer, 5 parts of matting powder, and 1 part of lanthanum-doped nano-silica; The preparation method of lanthanum-doped nano-silica is as follows: by mass, adding 0.03 part of lanthanum nitrate to 100 parts of water to obtain an aqueous solution of lanthanum nitrate, then adding 1 part of nano-silica to disperse uniformly by ultrasonic, and then adding ammonia water to adjust the pH Adjust to 9, collect the precipitate after centrifugation, wash and dry, and get it;

[0025] The core layer is made of the following raw materials by mass percentage: 95 parts of polypropylene, 1 part of antistatic agent, and 0.5 part of slip agent;

[0026] The lower layer is made of ...

Embodiment 2

[0031] A double-sided heat-sealing matte film is composed of an upper surface layer, a core layer and a lower surface layer in sequence;

[0032] The upper surface layer is made of the following raw materials by mass: 50 parts of polypropylene, 40 parts of high-density polyethylene, 30 parts of ethylene-1-octene copolymer, 8 parts of matting powder, and 3 parts of lanthanum-doped nano-silica; The preparation method of lanthanum-doped nano-silica is as follows: by mass, adding 0.1 part of lanthanum nitrate to 100 parts of water to obtain an aqueous solution of lanthanum nitrate, then adding 1 part of nano-silica to disperse uniformly by ultrasonic, and then adding ammonia water to adjust the pH Adjust to 11, collect the precipitate after centrifugation, wash and dry, and get it;

[0033] The core layer is made of the following raw materials by mass percentage: 98.5 parts of polypropylene, 3 parts of antistatic agent, and 2 parts of slip agent;

[0034] The lower layer is made ...

Embodiment 3

[0039] A double-sided heat-sealing matte film is composed of an upper surface layer, a core layer and a lower surface layer in sequence;

[0040] The upper surface layer is made of the following raw materials by mass: 45 parts of polypropylene, 37 parts of high-density polyethylene, 28 parts of ethylene-1-octene copolymer, 6 parts of matting powder, and 2 parts of lanthanum-doped nano-silica; The preparation method of lanthanum-doped nano-silica is as follows: in parts by mass, adding 0.05 part of lanthanum nitrate to 100 parts of water to obtain an aqueous solution of lanthanum nitrate, then adding 1 part of nano-silica to disperse uniformly by ultrasonic, and then adding ammonia water to adjust the pH Adjusted to 10, collected the precipitate after centrifugation, washed and dried to get it;

[0041] The core layer is made of the following raw materials by mass percentage: 96.5 parts of polypropylene, 2 parts of antistatic agent, and 1.5 parts of slip agent;

[0042] The lowe...

technical field

[0001] The invention relates to the technical field of films, in particular to a double-sided heat-sealing matte film and a preparation method thereof. Background technique

[0002] Heat-sealing film refers to a plastic film for heat-sealing, of which double-sided heat-sealing film is mainly used for the outer packaging of food, mainly including quick-frozen food packaging, retort food packaging, fast food packaging and snack beverage packaging. With the continuous improvement of people's aesthetics, ordinary light film packaging has been unable to attract the attention of customers. The packaging film with low gloss and high haze into diffuse reflection and matting effect is more and more popular. Therefore, a dual-layer packaging film has been developed. Surface heat-sealing matting film has broad prospects. The heat sealing film must have the following important properties: low heat sealing starting temperature, good cold and heat resistance, high heat se...

Examples

Embodiment 1

[0023] A double-sided heat-sealing matte film is composed of an upper surface layer, a core layer and a lower surface layer in sequence;

[0024] The upper surface layer is made of the following raw materials by mass: 44 parts of polypropylene, 35 parts of high-density polyethylene, 25 parts of ethylene-1-octene copolymer, 5 parts of matting powder, and 1 part of lanthanum-doped nano-silica; The preparation method of lanthanum-doped nano-silica is as follows: by mass, adding 0.03 part of lanthanum nitrate to 100 parts of water to obtain an aqueous solution of lanthanum nitrate, then adding 1 part of nano-silica to disperse uniformly by ultrasonic, and then adding ammonia water to adjust the pH Adjust to 9, collect the precipitate after centrifugation, wash and dry, and get it;

[0025] The core layer is made of the following raw materials by mass percentage: 95 parts of polypropylene, 1 part of antistatic agent, and 0.5 part of slip agent;

[0026] The lower layer is made of ...

Embodiment 2

[0031] A double-sided heat-sealing matte film is composed of an upper surface layer, a core layer and a lower surface layer in sequence;

[0032] The upper surface layer is made of the following raw materials by mass: 50 parts of polypropylene, 40 parts of high-density polyethylene, 30 parts of ethylene-1-octene copolymer, 8 parts of matting powder, and 3 parts of lanthanum-doped nano-silica; The preparation method of lanthanum-doped nano-silica is as follows: by mass, adding 0.1 part of lanthanum nitrate to 100 parts of water to obtain an aqueous solution of lanthanum nitrate, then adding 1 part of nano-silica to disperse uniformly by ultrasonic, and then adding ammonia water to adjust the pH Adjust to 11, collect the precipitate after centrifugation, wash and dry, and get it;

[0033] The core layer is made of the following raw materials by mass percentage: 98.5 parts of polypropylene, 3 parts of antistatic agent, and 2 parts of slip agent;

[0034] The lower layer is made ...

Embodiment 3

[0039] A double-sided heat-sealing matte film is composed of an upper surface layer, a core layer and a lower surface layer in sequence;

[0040] The upper surface layer is made of the following raw materials by mass: 45 parts of polypropylene, 37 parts of high-density polyethylene, 28 parts of ethylene-1-octene copolymer, 6 parts of matting powder, and 2 parts of lanthanum-doped nano-silica; The preparation method of lanthanum-doped nano-silica is as follows: in parts by mass, adding 0.05 part of lanthanum nitrate to 100 parts of water to obtain an aqueous solution of lanthanum nitrate, then adding 1 part of nano-silica to disperse uniformly by ultrasonic, and then adding ammonia water to adjust the pH Adjusted to 10, collected the precipitate after centrifugation, washed and dried to get it;

[0041] The core layer is made of the following raw materials by mass percentage: 96.5 parts of polypropylene, 2 parts of antistatic agent, and 1.5 parts of slip agent;

[0042] The lowe...