CN201663882U

CN201663882U - Vegetable ventilating preservative film

Info

Publication number: CN201663882U
Application number: CN2009201723356U
Authority: CN
Inventors: 唐新国; 王帮新; 张治国
Original assignee: ANHUI SHUANGJIN GROUP Co Ltd
Current assignee: ANHUI SHUANGJIN CO., LTD.
Priority date: 2009-05-31
Filing date: 2009-05-31
Publication date: 2010-12-08
Anticipated expiration: 2019-05-31

Abstract

The utility model discloses a vegetable ventilating preservative film and includes three layers which are respectively a corona layer, a middle layer and a heat-seal layer; the component of the corona layer is isotactic HOPP or COPP; the components of the middle layer are low density polyethylene, metallocene polyethylene and ethane-propylene copolymer; and the components of the heat-seal layer are COPP and antifogging agent. The preparation method includes the steps as follows: mixing-three-layer coextrusion-thickness detection-corona treatment-trimming-rolling-slitting-packaging. The vegetable ventilating preservative film has the advantages of non pollution, good air-permeability, excellent moisture-penetrability, long preservation time, good bacteria resistance, etc.

Description

A kind of vegetables preservative film of breathing freely

Technical field

The utility model relates to the ventilative preservative film of a kind of vegetables.

Background technology

Fresh-keeping approach such as present vegetables, fruit have chemical preservative, cryopreservation, air-conditioned cold store and preservative film technology.Chemical preservative is used for fresh-keeping less of greengrocery, and cost is higher, but how much allows people not quite relieved to food sanitation safe; The fresh-keeping cost of air-conditioned cold store is higher; The cryopreservation fresh keeping time is short, should not transport for long-distance; And traditional fresh-keeping of vegetables film, its main material is made (for example number of patent application is 96118948.7 and 98126163.5) by polyvinyl chloride (PVC) resin material, its mechanism is by adding the micropore that inorganic fillings such as calcium carbonate form, reach ventilative fresh-keeping purpose, but polyvinyl chloride (PVC) material is difficult for reclaiming, and easily causes environmental pollution.Number of patent application is 90102104.0 to should be mentioned that add mineral matter (medical stone etc.) preparation preservative film in polyethylene.

The utility model content

The utility model discloses the ventilative preservative film of a kind of vegetables, advantage such as it has pollution-free, good permeability, excellent moisture permeability, fresh keeping time is long, biocidal property is good.

The technical solution of the utility model is:

A kind of vegetables preservative film of breathing freely, it is characterized in that: include three-decker, be respectively corona layer, intermediate layer and hot sealing layer, the thickness of the ventilative preservative film of described vegetables is the 10-80 micron, and the bed thickness ratio of described three-decker is respectively: corona layer 10%-60%, intermediate layer 10%-60%, hot sealing layer 5%-40%.

Described a kind of vegetables preservative film of breathing freely, it is characterized in that: the component of corona layer is isotactic HOPP or COPP, the component in intermediate layer is low density polyethylene (LDPE), metallocene PE and ethylene-propylene copolymer, and the component of hot sealing layer is COPP and antifoggant; The ratio of described each component of corona layer is: isotactic HOPP or COPP 100%, the ratio of each component of intermediate layer is: low density polyethylene (LDPE) 10-60%, metallocene PE 10-80%, ethylene-propylene copolymer 10-80%, the ratio of each component of hot sealing layer is COPP 70-99%, antifoggant 1-30%.

Described a kind of vegetables preservative film of breathing freely is characterized in that: add deodorant, antioxidant or antiseptic in the described hot sealing layer.

The preparation method of the ventilative preservative film of described vegetables, each component in skin, intermediate layer and the adhesive layer is mixed stirring in proportion respectively, then three layers of each component after the mixing and stirring being put into three-layer co-extruded casting machine carries out three-layer co-extruded, form three-layer co-extruded film, then it is carried out thickness measuring, then the corona layer is carried out sided corona treatment, then three-layer co-extruded film after the sided corona treatment is cut edge, rolling, cut, packs.

Advantage of the present utility model is:

1, environmental protection, raw material can be recycled, and are free from environmental pollution;

2, CO ₂, O ₂The two-way adjustability of gaseous state ratio.Different vegetables types, its appropriate C O ₂, O ₂Gaseous state is than different, and the utility model is regulated formula rate according to different vegetables types, adjusts CO ₂, O ₂The gaseous state ratio is to adapt to different vegetables packings;

3, permeability is good.Main metabolite such as vegetables, fruit is CO ₂, ethene, acetaldehyde, ethanol etc., the utility model sees through gas-selectively, can make the CO of products such as the vegetables institute metabolism of packing ₂, O ₂Keep certain gaseous state ratio, gases such as ethene, acetaldehyde, ethanol appear, thereby the eupnea of inhibition vegetables etc. delays its metabolism;

4, water vapour permeability excellence.Because the aqueous vapors of will breathing out such as vegetables behind the film bag, can be condensed at the film inwall, form dewfall or water droplet, the rotten speed of meeting expedite product, the utility model can be discharged unnecessary aqueous vapor, avoid the dewfall phenomenon;

5, bacteriostasis property is because CO in the packaging bag ₂The concentration height, can both play inhibitory action to various putrefactive bacteriums;

6, fresh keeping time is long, can fresh-keeping 20-30 days for the common vegetable class, and the fruit type time is longer, helps storage and way far away transportation.

Description of drawings

Accompanying drawing is the utility model structural representation.

The specific embodiment

The component isotactic HOPP or the COPP of corona layer 1 are stirred, with intermediate layer 2 components is low density polyethylene (LDPE) 10-60% in proportion, metallocene PE 10-80%, ethylene-propylene copolymer 10-80% mixing and stirring, the component of hot sealing layer 3 is COPP 70-99% in proportion, antifoggant 1-30% mixing and stirring, then three layers of each component after the mixing and stirring being put into three-layer co-extruded casting machine machine carries out three-layer co-extruded, form three-layer co-extruded film, then it is carried out thickness measuring, guarantee that thickness is the 10-500 micron, wherein the bed thickness ratio of three-decker is respectively: corona layer 10%-60%, intermediate layer 10%-60%, hot sealing layer 5%-40%, then the corona layer is carried out sided corona treatment, then three-layer co-extruded film after the sided corona treatment is cut edge, rolling, cut, packing.

Claims

1. the ventilative preservative film of vegetables, it is characterized in that: include three-decker, be respectively corona layer, intermediate layer and hot sealing layer, the thickness of the ventilative preservative film of described vegetables is the 10-80 micron, and the bed thickness ratio of described three-decker is respectively: corona layer 10%-60%, intermediate layer 10%-60%, hot sealing layer 5%-40%.