Removable heat sealable film for container lid
DATE：2019/7/15 10:18:03 / READ： / SOURCE：This station
Removable heat sealable film for container lid
The packaging container cover made of various composite films requires heat resistance, opening of the cover, and adaptability to various container materials.
Plastic packaging including bowls, boxes, cans and the like are high density polyethylene, high impact polystyrene, polystyrene, polypropylene, polyvinyl chloride, modified copolymer resin, non-crystalline polyester and the like. The cover material heat seal film has good peelability for this material.
Different plastic processing temperatures are different, and different substrates have different heat sealing temperatures, so the cover material heat sealing film is used at a wide temperature.
The plastic container is used for packaging yogurt, milk sweet food, instant noodles, jelly, etc. The heat sealing film for the cover material should be adapted to the packaging and heat sealing conditions, and has good heat seal strength, peel strength, and heat seal temperature. Stable performance and other requirements, so as to be heat-sealed with the cup body, to meet the requirements of transportation and storage fastness, and it can be peeled off from the cup body without leaving the film, convenient to use.
The material for heat sealing film for cover material is modified ethylene-propionic acid copolymer, modified ethylene-vinyl acetate copolymer and modified polypropylene, etc. There are also four different polyethylene materials, which are co-extruded into five layers of co-extrusion. A film for a cover material of a cast film, and an example of a PP/PS alloy modified with polystyrene as a base material will be described below.
Polystyrene-modified polypropylene alloy "VMX" which is different from general PP/PS blends, and PS blends are uniformly dispersed in polypropylene with a size of 0.1 to 2 um. Excellent physical and mechanical properties, good formability, good peelability with polymers such as polypropylene and styrene polymers. The heat sealable film VMX film made from it is a formable and peelable heat. Sealing film.
Special functional polymer alloy (Ppeps) bonding, such as non-adhesive resin, dispersed in micron order, in the heat-pressurized heat sealing process, the micron-sized dispersion layer is presented at the interface, and the micro-process control and the bonded container The strong hot-melt adhesive portion of the material is used to control the heat-sealing strength. Therefore, when peeling off, it is a completely sealed agglomeration failure in the micrometer range, and a clean peeling surface exhibiting interfacial peeling.
The characteristics of the VMX film are as follows:
1) It has a smooth peeling property, and it is only necessary to gently apply it when opening, and good peeling can be obtained.
2) Cleaned container surface: The peeling state of the sealing interface leaves almost no residue of the flange portion of the container.
3) Wide heat sealing temperature: A wide range of heat sealing properties can be obtained from low temperature to high temperature, and a stable and suitable sealing strength is obtained.
4) Excellent stamping resistance: Due to the rigidity of the film surface, it can be easily stamped and processed without worrying about burrs, and a flat interface can be obtained.
5) Excellent composite property: Due to the smoothness of the film, high-performance stable operation can be obtained in the process of extrusion compounding and the like.
6) Excellent filling and packaging: moderate rigidity and smoothness, which improves the efficiency of filling and packaging.
7) Excellent hygienic properties: almost no additives, low molecular components, and good hygiene.
The packaging container cover made of various composite films requires heat resistance, opening of the cover, and adaptability to various container materials.
Plastic packaging including bowls, boxes, cans and the like are high density polyethylene, high impact polystyrene, polystyrene, polypropylene, polyvinyl chloride, modified copolymer resin, non-crystalline polyester and the like. The cover material heat seal film has good peelability for this material.
Different plastic processing temperatures are different, and different substrates have different heat sealing temperatures, so the cover material heat sealing film is used at a wide temperature.
The plastic container is used for packaging yogurt, milk sweet food, instant noodles, jelly, etc. The heat sealing film for the cover material should be adapted to the packaging and heat sealing conditions, and has good heat seal strength, peel strength, and heat seal temperature. Stable performance and other requirements, so as to be heat-sealed with the cup body, to meet the requirements of transportation and storage fastness, and it can be peeled off from the cup body without leaving the film, convenient to use.
The material for heat sealing film for cover material is modified ethylene-propionic acid copolymer, modified ethylene-vinyl acetate copolymer and modified polypropylene, etc. There are also four different polyethylene materials, which are co-extruded into five layers of co-extrusion. A film for a cover material of a cast film, and an example of a PP/PS alloy modified with polystyrene as a base material will be described below.
Polystyrene-modified polypropylene alloy "VMX" which is different from general PP/PS blends, and PS blends are uniformly dispersed in polypropylene with a size of 0.1 to 2 um. Excellent physical and mechanical properties, good formability, good peelability with polymers such as polypropylene and styrene polymers. The heat sealable film VMX film made from it is a formable and peelable heat. Sealing film.
Special functional polymer alloy (Ppeps) bonding, such as non-adhesive resin, dispersed in micron order, in the heat-pressurized heat sealing process, the micron-sized dispersion layer is presented at the interface, and the micro-process control and the bonded container The strong hot-melt adhesive portion of the material is used to control the heat-sealing strength. Therefore, when peeling off, it is a completely sealed agglomeration failure in the micrometer range, and a clean peeling surface exhibiting interfacial peeling.
The characteristics of the VMX film are as follows:
1) It has a smooth peeling property, and it is only necessary to gently apply it when opening, and good peeling can be obtained.
2) Cleaned container surface: The peeling state of the sealing interface leaves almost no residue of the flange portion of the container.
3) Wide heat sealing temperature: A wide range of heat sealing properties can be obtained from low temperature to high temperature, and a stable and suitable sealing strength is obtained.
4) Excellent stamping resistance: Due to the rigidity of the film surface, it can be easily stamped and processed without worrying about burrs, and a flat interface can be obtained.
5) Excellent composite property: Due to the smoothness of the film, high-performance stable operation can be obtained in the process of extrusion compounding and the like.
6) Excellent filling and packaging: moderate rigidity and smoothness, which improves the efficiency of filling and packaging.
7) Excellent hygienic properties: almost no additives, low molecular components, and good hygiene.
Author：admin