CN202319193U

CN202319193U - Heat-sealing multifunctional polyamide preservative film

Info

Publication number: CN202319193U
Application number: CN2011204646113U
Authority: CN
Inventors: 许忠甫; 武延孝
Original assignee: NINGBO KEREN COMPOSITE MATERIAL CO Ltd
Current assignee: NINGBO KEREN COMPOSITE MATERIAL CO Ltd
Priority date: 2011-11-16
Filing date: 2011-11-16
Publication date: 2012-07-11
Anticipated expiration: 2021-11-16

Abstract

The utility model discloses a heat-sealing multifunctional polyamide preservative film and relates to a composite packaging material. The heat-sealing multifunctional polyamide preservative film has a three-layer structure; one layer is a core layer (1) and two layers are surface layers (2); two surface layers (2) are arranged on two surfaces of the core layer (1); the two surface layers (2) and one core layer (1) are pressed to form an integral film structure; and the surface layers (2) are light-absorbing preservative layers containing heat-sealing materials and high-barrier materials. The heat-sealing multifunctional polyamide preservative film solves the technical problem that the conventional polyamide (PA) preservative films are low in cost and mostly manufactured by compounding a plurality of layers of films or casting various materials.

Description

The multi-functional polyamide antistaling film of heat-sealing type

Technical field

The utility model relates to a kind of compound package material.

Background technology

The general material amount of existing preservative film PA, the preservative film cost of PA is higher; And be mostly the compound or multiple material curtain coating making of plural layers, there are a lot of technological deficiencies in manufacturing process, causes poor product quality.

The utility model content

The utility model provides a kind of heat-sealing type multi-functional polyamide antistaling film, and it is higher that the utility model has solved existing P A preservative film cost; And be mostly the technical problem that the compound or multiple material curtain coating of plural layers is made existence.

For addressing the above problem, the utility model adopts following technical scheme: the multi-functional polyamide antistaling film of heat-sealing type, constitute by three-decker, wherein one deck be sandwich layer (1), two-layer be top layer (2); Two-layer top layer (2) is arranged at sandwich layer (1) two sides respectively, and two-layer top layer (2) and one deck sandwich layer (1) are suppressed into the membrane structure of one, and top layer (2) are the fresh-keeping layer of the delustring that contains heat-sealable material and high barrier material therein.

Said core layer thickness is the 10-20 micron; Said each skin depth is the 2-3 micron.

The utility model advantage: 1. on the structure: this product is a three-decker, adopts stretch processes, uses PP/PE/PA blend composition and heat-sealable material, and it is functional to have expanded film; 2. on the function: 1. need not secondary operations, can use as heat-sealing film and preservative film separately, significantly save production cost; 2. high obstructing performance has guaranteed the fresh-keeping effect of packing material, and has good heat sealability, promotes the quality of packing.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

As shown in Figure 1, the multi-functional polyamide antistaling film of heat-sealing type is made up of three-decker, wherein one deck be sandwich layer (1), two-layer be top layer (2); Two-layer top layer (2) is arranged at sandwich layer (1) two sides respectively, and two-layer top layer (2) and one deck sandwich layer (1) are suppressed into the membrane structure of one, and top layer (2) are the fresh-keeping layer of the heat-sealing that contains heat-sealable material and high barrier material therein.Said sandwich layer also can be the PP material layers.

The said goods is through co-extrusion, stretching process and form above-mentioned top layer, sandwich layer.The sandwich layer main component is PP or PP masterbatch and little additive, and the top layer mainly is hot blast material and PP masterbatch or PP/PE/PA blend composition.Process is: with the raw material auxiliary material send into feed bin, high-pressure delivery to extruder plastifies into melt; Melt filters through pipeline transmission, filter; Be assigned to die head through runner, become the casting sheet through cold cydariform, thereafter through longitudinal stretching, cross directional stretch system film; Film becomes parent roll at traction unit through corona treatment, cuts into finished film at last.

This product directly uses the PP/PE/PA blend composition in film-forming process; Compare during with general thin or PA film as the preservative film purposes; Advantage is mainly reflected in following aspect: need not compound or following process such as curtain coating; High obstructing performance has guaranteed the fresh-keeping effect of packing material, and has good heat sealability, promotes the sensory effects of packing; Can cut down the consumption of energy and environmental protection in the production.

PP described in the above-mentioned material is a polypropylene: chemical formula for-CH2--CH (CH3)-]-n, be propylene resulting product of polymerization reaction take place under catalyst action, English name: Polypropylene (being called for short PP); PE is HDPE, just low-pressure high-density polyethylene: chemical formula is-[CH2-CH2-]-n, is the polyethylene of low-pressure polymerization (ziegler process) gained, English name: Polyethylene (being called for short PE); PA is polyamide (nylon): chemical formula :-[NH-(CH2) 5-CO] n-is made English name through polycondensation reaction by adipic acid and hexamethylene diamine: Polyamide (being called for short PA); Heat-sealable material is binary or terpolymer.

The multi-functional polyamide antistaling film of heat-sealing type is that biaxial tension generates, and has the film of heat-sealing function and good fresh-keeping function, and its main component is PP/PE/PA; Have characteristics such as intensity height, good rigidly, barrier property be good; Do not have smell, tasteless, nontoxic, outstanding obdurability; Excellent abrasion resistance, folding resistance, anti-pin hole property and tear resistance etc. are arranged; Heat-shrinkable is minimum; Has good antistatic behaviour, the adhesive force of heat sealability, barrier and printing; Simultaneously, extinction type, polypropylene, polyethylene, polyamide blended antistaling film also have good hear resistance, low temperature resistant freezing property; Good oil resistivity and chemical-resistant etc.; Except nitrobenzene, chloroform, phenmethylol, most of chemicals all can not make its dissolving; In addition, the multi-functional polyamide antistaling film of heat-sealing type water absorption rate is low; Water-tolerant, printing performance is good, the food that the proper packing water content is high; Especially under moist or freezing situation; Still kept excellent oxygen barrier property, so, be a excellent fresh-keeping packaging material to the chilled beverage of smell sensitivity and the fresh-keeping aspect of food.

What should explain at last is: obviously, the foregoing description only be for explain clearly that the utility model does for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being amplified out thus or change still are among the protection domain of the utility model.

Claims

1. the multi-functional polyamide antistaling film of heat-sealing type is characterized in that, constitute by three-decker, wherein one deck be sandwich layer (1), two-layer be top layer (2); Two-layer top layer (2) is arranged at sandwich layer (1) two sides respectively, and two-layer top layer (2) and one deck sandwich layer (1) are suppressed into the membrane structure of one, and top layer (2) are the fresh-keeping layer of the heat-sealing that contains heat-sealable material and high barrier material therein.

2. the multi-functional polyamide antistaling film of heat-sealing type according to claim 1 is characterized in that said core layer thickness is the 10-20 micron; Said each skin depth is the 2-3 micron.