CN1062911A

CN1062911A - The manufacture method of fruit-vegetable plastic wrap

Info

Publication number: CN1062911A
Application number: CN 90110361
Authority: CN
Inventors: 凌海波; 邹本璋; 凌凡
Original assignee: Individual
Current assignee: Individual
Priority date: 1990-12-28
Filing date: 1990-12-28
Publication date: 1992-07-22

Abstract

The present invention relates to a kind of manufacture method of fruit-vegetable plastic wrap.Preserve and to exit by frequent opening with common polyethylene film packing fruit, vegetables, both required great effort, should rot again.The invention provides a kind of boil face and sterilant of in polyethylene, adding, make the method for fruit-vegetable plastic wrap.Adopt the made film of method of the present invention to be used to preserve fruits and vegetables and can inhale the gas and the killing bacteria of being emitted by the storage thing.Its storage period can be than long 1～6 times with common polythene, and is not weightless, nondiscoloration.

Description

The manufacture method of fruit-vegetable plastic wrap

A kind of manufacture method of fruit-vegetable plastic wrap the present invention relates to a kind of working method of using inorganics as the organic high molecular compound of compounding ingredient.

The storage of vegetables and fruit be dredge prosperously provide additional supplies, the important means of stable market supply, existing at present multiple storage practice is encased in fruit or vegetables in the polyethylene film packing bag, puts into air adjusting storeroom after sealing and be exactly the most frequently used a kind of.Because the permeability of polyethylene film is poor, in storage period, want regularly every bag seal to be opened venting, so promptly increased working strength of workers, be difficult to guarantee storage quality again.In order to address this problem, the silicon window storage film has appearred, and its structure is to open a hole on a certain position of film, posts the silicone rubber membrane with certain air permeability energy at tapping, and the film of this structure is its manufacturing process more complicated undoubtedly, and cost is higher.Filling weighting agent in plastics, had report with the performance that changes plastics, is open day January 3 nineteen ninety of 88103719.2(as number of patent application) patent document in a kind of preparation method etc. of toughened calcium carbonate filled polypropylene is disclosed.In prior art, the main purpose that increases weighting agent is to increase the cost of rigidity, thermotolerance and the reduction material of material.

The object of the present invention is to provide and a kind ofly can adsorb fruit or ethylene gas that vegetables discharged and have the manufacture method of the fruit-vegetable plastic wrap of sterilizing function.

The objective of the invention is to realize by the following method:

Its raw material consists of new LDPE (film grade) 90～98%, zeolite 1～10%, sterilant 0.5～2%, coupling agent 1～3%.

Its working method comprises that elder generation with new LDPE (film grade), zeolite with after accounting for the thick mixing of coupling agent of total consumption 50%, puts into forcing machine, extrudes under 150 ℃ of temperature, with water cooling, pelletizing.Sterilant, the coupling agent that accounts for total consumption 50% are mixed once more with thick mixed pellet before the blown film, carry out blown film.

Used sterilant can be hypochlorite such as clorox, Losantin or pyrosulfite among the present invention, as Sodium Pyrosulfite.

Used coupling agent is the phthalate coupling agent among the present invention, and available type has monoalkoxy, monoalkoxy-pyrophosphate, chela gas type 100.

Compared with the prior art the invention has the advantages that and in the low-density polyethylene material, be added into zeolite and sterilant as weighting agent, make the plastic film of making have more satisfactory pumping property, can adsorb the gases such as ethene that fruit, vegetables are emitted effectively in storage, simultaneously have certain bactericidal property again, can kill on fruit, the vegetables with bacterium.Adopt method of the present invention to make fruit, fresh-keeping of vegetables film, cost is low, and method is easy.

Adopt the prepared preservative film of method of the present invention can be applied to the storage of different types of fruit or vegetables.After for example capsicum being loaded in the bag that this preservative film makes, be put in 7～9 ℃, relative humidity 80～85%, in the draughty storage, freshness-retained 70～80 days, fruit was not weightless, annesl, good fruit rate＞90%, rotting rate＜10%.

For example processing method of the present invention is elaborated below:

Listed 3 assembly in the subordinate list than forming, zeolite is wherein selected the chemical pure zeolite for use, and sterilant is a hypochlorite, as clorox, Losantin or pyrosulphite salt, as Sodium Pyrosulfite, coupling agent is a phthalein ester class coupling agent, as monoalkoxy, monoalkoxy-pyrophosphate, chela gas type 100.Its working method is: at first the coupling agent with new LDPE (film grade), zeolite and total consumption 50% slightly mixes, and puts into forcing machine.Under 150 ℃ temperature, extrude, water cooling, pelletizing, dry (or oven dry).Coupling agent with sterilant, total consumption 50% before the blown film mixes once more with thick mixed pellet, carries out blown film, is blow molded into the film that 0.08mm is thick, 400mm is wide.This film can be made packing bag, is used for fresh-keeping fruits and vegetables.Adopt first assembly to can be used for fresh-keeping, storage fruit vegetables than made preservative film.Adopt second assembly to can be used for fresh-keeping, storage leaf vegetables than made preservative film.Adopt the 3rd assembly than made preservative film, can be used for fresh-keeping, storage capsicum class vegetables.

Claims

1, a kind of manufacture method of fruit-vegetable plastic wrap, it is a base-material with 90～98% new LDPE (film grade), adding weighting agent, coupling agent are made film, it is characterized in that:

1. used weighting agent is a zeolite, and its content is 1～10%;

2. also add 0.5～2% sterilant;

The consumption of 3. used coupling agent is 1～3%;

4. earlier the coupling agent of new LDPE (film grade), zeolite and 50% is slightly mixed the back granulation;

5. the coupling agent that adds sterilant and 50% mixes the back blown film once more.

2, the manufacture method of fruit-vegetable plastic wrap according to claim 1 is characterized in that described sterilant is hypochlorite, pyrosulfite.

3, the manufacture method of fruit-vegetable plastic wrap according to claim 2 is characterized in that described hypochlorite is clorox, Losantin.

4, the manufacture method of fruit-vegetable plastic wrap according to claim 2 is characterized in that described pyrosulfite is a Sodium Pyrosulfite.

5,, it is characterized in that it consists of new LDPE (film grade) 94～96%, zeolite 3～4%, sterilant 1%, coupling agent 1% according to the manufacture method of claim 1,2,3,4 described fruit-vegetable plastic wraps.

6,, it is characterized in that it consists of new LDPE (film grade) 92～94%, zeolite 4～6%, sterilant 1%, coupling agent 1% according to the manufacture method of claim 1,2,3,4 described fruit-vegetable plastic wraps.

7,, it is characterized in that it consists of new LDPE (film grade) 95%, zeolite 4.5%, sterilant 1%, coupling agent 1% according to the manufacture method of claim 1,2,3,4 described fruit-vegetable plastic wraps.