CN2227020Y

CN2227020Y - Dry-type compound packing film

Info

Publication number: CN2227020Y
Application number: CN 95212711
Authority: CN
Inventors: 徐平; 陈应鸿; 张东宁
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-18
Filing date: 1995-05-18
Publication date: 1996-05-15
Anticipated expiration: 2005-05-18

Abstract

The utility model discloses a dry-type compound packing film, which belongs to the technical field that synthetic resin sheet are pasted to form a laminar product. Polyvinylidene chloride film is adopted as the intermediate layer, and the intermediate layer has a dry-type compounding with the inner and outer surface layers; thus, the barrier property of the material is improved, and the utility model is resistant to be boiled and has visibility; the utility model is a new-type food packing material.

Description

The dry type composite packing film

The thin layer that the utility model relates to variety classes synthetic resin pastes and the technical field of the laminar product formed mutually, particularly a kind of dry type composite packing film.

Existing high barrier compound package material mainly contains three kinds.The one, nylon is compound, the 2nd, and polyvinyl alcohol and the coating of polyvinylidene chloride latex be compound, the 3rd, and aluminium is thin compound, and wherein the nylon barrier is subjected to the influence of ambient humidity bigger, poor stability; Aluminium approaches the compound defective that then has not visible property; Polyvinyl alcohol and polyvinylidene chloride latex coating processing are very complicated, obtain high barrier and need repeatedly coating, and environment is had pollution.Three-layer plastic compound film as a kind of used for packaging food, polyvinyl alcohol (PVA) coating that makes with rubbing method is as the intermediate layer, its thickness is 1-5 μ m, the barrier of polyvinyl alcohol (PVA) coating is relatively poor on the one hand, thickness is little on the other hand, rejection rate to oxygen, water vapour is low, can not adapt to the requirement of the long-period freshness preserving of food.

The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art part, a kind of barrier property height is provided, makes simple polyvinylidene chloride dry type composite packing film.

The purpose of this utility model is achieved by the following technical solution: the dry type composite packing film, comprise the extexine that constitutes with Biaxially oriented polypropylene (BOPP) film or other material, to flow the endosexine that absurd fantastic polyethylene (CPE) film or other easy heat-sealable material constitute, polyvinylidene chloride film is adopted in intermediate layer between extexine and endosexine, and the tack coat of the compound usefulness of dry type is arranged respectively between intermediate layer and two top layers.

Further, the thickness in intermediate layer is 10-40 μ m, and tack coat is common adhesive or the adhesive of anti-the boiling.

Adopt above-mentioned layer structure, make to the utlity model has following advantage:

1, developed the purposes of high barrier polyvinylidene chloride material, made the packaging material barrier property better;

2, not only barrier property is good to make packaging material, and has visuality;

3, make simple, pollution-free, as to have reduced packaging material cost, remarkable in economical benefits.

Fig. 1 is a deck structure schematic diagram of the present utility model.

Below in conjunction with drawings and Examples the utility model is further elaborated.

With reference to Fig. 1, present embodiment mainly contains three layers, extexine 1 is Biaxially oriented polypropylene (BOPP) film, intermediate layer 2 is polyvinylidene chloride (PVDC) films, endosexine 3 is hydrostomia polyethylene (CPE) films, be tack coat 4 between the three-layer thin-film, adopt common adhesive, or adopt the adhesive of anti-the boiling according to actual needs.

During the manufacturing, with the low heat shrinkage thickness that makes is individual layer polyvinylidene chloride (PVDC) film of 10 μ m, compound with common adhesive and Biaxially oriented polypropylene (BOPP) film dry type, again that another surperficial coated with adhesive of polyvinylidene chloride (PVDC) film in intermediate layer is compound with stream absurd fantastic polyethylene (CPE) film dry type, make the dry type compound package material.Certainly, the Biaxially oriented polypropylene of extexine 1 (BOPP) also can adopt other material such as biaxial stretching polyester (BOPET) or polyvinyl chloride (PVC) sheet material to replace; And the also available ethylene-vinyl acetate copolymer resins in endosexine 3 (EVA) waits other material.And the thickness of intermediate layer 2 polyvinylidene chloride (PVDC) film can be chosen in 10-40 μ m according to the height of barrier.

Claims

1, dry type composite packing film, the endosexine (3) that comprises the extexine (1) that constitutes with Biaxially oriented polypropylene (BOPP) film or other material, constitutes with hydrostomia polyethylene (CPE) film or other easy heat-sealable material, it is characterized in that: the intermediate layer (2) between extexine (1) and endosexine (3) is polyvinylidene chloride (PVDC) film, and the tack coat (4) of the compound usefulness of dry type is arranged respectively between intermediate layer (2) and two top layers.

2, packing film according to claim 1 is characterized in that described intermediate layer (2) thickness is between 10-40 μ m.