CN104650447A - Starch-based modified plastic freshness-preservation bag material and preparation process thereof - Google Patents
Starch-based modified plastic freshness-preservation bag material and preparation process thereof Download PDFInfo
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- CN104650447A CN104650447A CN201510032463.0A CN201510032463A CN104650447A CN 104650447 A CN104650447 A CN 104650447A CN 201510032463 A CN201510032463 A CN 201510032463A CN 104650447 A CN104650447 A CN 104650447A
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- China
- Prior art keywords
- protection package
- freshness protection
- starch
- parts
- modified plastics
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
Abstract
The invention discloses a starch-based modified plastic freshness-preservation bag material. The starch-based modified plastic freshness-preservation bag material is characterized by comprising the following components in parts by weight: 250-350 parts of modified starch with granularity of 800-1100 meshes, 45-55 parts of silicon dioxide with granularity of 4500-5500 meshes, 4-6 parts of a coupling agent, 40-50 parts of polyethylene wax, 45-55 parts of a POE (Polyolefin) elastomer, and 500-600 parts of LLDPE (Linear Low Density Polyethylene), wherein the sum of the parts by weight of various components is 1000 parts. The starch-based modified plastic freshness-preservation bag material disclosed by the invention is ventilated and waterproof and is capable of absorbing ethylene gas released by packaged fruits, so that the effects of preserving freshness and conserving water are achieved.
Description
Technical field
The present invention relates to freshness protection package and prepare field of material technology, relate to a kind of starch base modified plastics freshness protection package material in particular.
Background technology
Freshness protection package, the sack being mainly used in other foods such as preservation veterinary antibiotics, cereal, prepared food of main finger food fresh keeping film production, uses widely in daily life.Freshness protection package is divided into the kinds such as polyethylene (PE), polyvinyl chloride (PVC), polyvinylidene dichloride (PVDC) by making material.PE, PVDC freshness protection package is relatively safe, and PE is mainly used in the packaging of fruit, vegetables etc., and PVDC is mainly used in the packaging of some prepared food, hams etc.And although PVC freshness protection package is widely used in the outer packaging of food, vegetables etc., there is certain potential hazard to human body.Its harm is mainly derived from two aspects: one is vinyl chloride-butyl acrylate compolymer in product (vinylchlorid to the threshold limit values standard of human body for being less than 1mg/kg), and two is contaminations of the processing aid used in the course of processing.Two kinds of carcinogenic possibilities of material tool are had in PVC, one is VCM (vinyl chloride monomer), one is DEHA (softening agent), if the composition of VCM is nontoxic in the scope of 1PPM (1,000,000/), just has carcinogenic possibility if exceeded standard; And softening agent at high temperature can discharge and harmful.Therefore, the most widely used is at present PE, PVDC freshness protection package.But, no matter be freshness protection package prepared by PE or PVDC material, good freshening effect all do not had to fruit, vegetables.For fruit, in application field, the treatment process of the orchard worker of more than 90% to fruit is had to be: soon ripened fruit is taken off, slowly accelerate the ripening, such fruit can be put slightly long-time, if hung over, treetop etc. is ripe to be taken off again, puts less than how long just rotting.And the principle that fruit accelerates the ripening is: utilize ethene to have dematuration to fruit, deposited in by fruit in this gas, this gas of fruit respiratory tract, can accelerate the chemical reaction of self, inner carbohydrate reaction, and sugar accumulation, to certain phase, is exactly ripe; Fruit is once maturation, if continue to be placed in ethene environment, inner biochemical reaction keeps fast, continue carbohydrate reaction, sugar changes into alcohol, sugar reduces, and alcohol (ethanol) how, the further deliquescing of fruit ... our naked eyes are seen, are exactly that fruit " has rotted ".Therefore, if ripened fruit continuation sack encapsulates by we, because sack itself is air-locked, ethylene concentration in sack can rise gradually, when we carry out fresh-keeping with freshness protection package to fruit, not only do not have freshening effect, also can accelerate fruit maturation and rot.For this reason, part freshness protection package is had can be designed specifically to very lacunary structure, to reach ventilated effect; But consequent problem is that sack is permeable, and the moisture in fruit can run off easily, fruit is not put and will be become dry for several days, and fresh-keeping effect is poor.
For this reason, orchard worker, taking after fruit accelerates the ripening, also can spray one deck fresh-keeping liquid at fruit surface, form thin film at fruit surface, suppress the breathing of fruit, control the speed of fruit decay, keep relative humidity, avoid internal moisture to evaporate.But this mode is also not suitable for all fruit, some fruit also can change color after using preservation agent, and even produce peculiar smell, effect can be run counter to desire; Exceed standard as fresh-keeping agent of fruits or illegally add, very large to harm, genetic damage, hepatic and renal function may be caused to damage, also can cause chronic poisoning etc.Therefore, along with the raising gradually of people's healthcare knowledge level, also more and more resistance is represented to the attitude of the fresh-keeping mode using the fresh-keeping vegetables and fruits of preservation agent.Therefore, current, the fresh keeping method not adding any chemical preservative be only people be worth advocating.
Summary of the invention
Object of the present invention is exactly deficiency in order to solve prior art and the one not only permeable watertight provided, and the ethylene gas that the fruit that can absorb packaging discharges, and has the starch base modified plastics freshness protection package material of fresh-keeping water retaining function.
Another object of the present invention is to provide a kind of preparation technology of starch base modified plastics freshness protection package material.
The present invention adopts following technical solution to realize above-mentioned purpose: a kind of starch base modified plastics freshness protection package material, and it is characterized in that, its component comprises by weight:
Further illustrating as such scheme: preferably, the component of starch base modified plastics freshness protection package material comprises by weight:
A preparation technology for starch base modified plastics freshness protection package material, it is characterized in that, it comprises the steps:
A, adopt described in formula, weigh in the ratio of each component;
B, first by the material of each component at horizontal high-speed mixing machine high-speed mixing 10-20 minute;
C, by the mass transport that mixes to the granulation of parallel equidirectional two-screw forcing machine, produce pellet.
In the high-speed mixing process of described processing step b, high-speed mixing 15 minutes.
After described processing step c, coating materials coiled material produced by pellet on plastic film blowing machine, and coiled material makes plastic packaging bag on plastic bag making machine.
The beneficial effect that the present invention adopts above-mentioned technical solution to reach is:
1, the present invention selects the good treated starch of the water absorbing properties of certain particle size, starch through modification can form Minute pores in plastic membrane blowing process, the ethylene gas reaching ventilative, waterproof and have the fruit absorbing packaging to discharge, reaches the effect of fresh-keeping water conservation.
2, the present invention adopt the silicon-dioxide of certain particle size and treated starch used in combination, further increase the ability of the ethylene gas that its fruit absorbing packaging discharges, reach the effect of good fresh-keeping water conservation.
3, the present invention adopts titanate coupling agent to be used for coated process starch and silicon-dioxide powdery, make powder better compatible with LLDPE polyethylene, add polyethylene wax and play dissemination in the course of processing, treated starch is better dispersed in plastics, plays the function of treated starch and silicon-dioxide to greatest extent.
Embodiment
Below in conjunction with specific embodiment, technical scheme of the present invention is explained in detail.
Embodiment 1
A kind of starch base modified plastics of the present invention freshness protection package material, its component comprises by weight:
Be below the preparation technology of starch base modified plastics freshness protection package material, it comprises the steps:
A, according to described formula, to weigh in the ratio of each component;
B, first by the material of each component horizontal high-speed mixing machine high-speed mixing 15 minutes;
C, by the mass transport that mixes to the granulation of parallel equidirectional two-screw forcing machine, produce pellet.
After described processing step c, coating materials coiled material produced by pellet on plastic film blowing machine, and coiled material makes plastic packaging bag on plastic bag making machine.
Embodiment 2
In the present embodiment, starch base modified plastics freshness protection package material, its component comprises by weight:
Be below the preparation technology of starch base modified plastics freshness protection package material, it comprises the steps:
A, according to described formula, to weigh in the ratio of each component;
B, first by the material of each component horizontal high-speed mixing machine high-speed mixing 18 minutes;
C, by the mass transport that mixes to the granulation of parallel equidirectional two-screw forcing machine, produce pellet.
After described processing step c, coating materials coiled material produced by pellet on plastic film blowing machine, and coiled material makes plastic packaging bag on plastic bag making machine.
Embodiment 3
In the present embodiment, starch base modified plastics freshness protection package material, its component comprises by weight:
Be below the preparation technology of starch base modified plastics freshness protection package material, it comprises the steps:
A, according to described formula, to weigh in the ratio of each component;
B, first by the material of each component horizontal high-speed mixing machine high-speed mixing 20 minutes;
C, by the mass transport that mixes to the granulation of parallel equidirectional two-screw forcing machine, produce pellet.
After described processing step c, coating materials coiled material produced by pellet on plastic film blowing machine, and coiled material makes plastic packaging bag on plastic bag making machine.
Above-described is only the preferred embodiment of the present invention, it should be pointed out that for the person of ordinary skill of the art, and without departing from the concept of the premise of the invention, can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (5)
1. a starch base modified plastics freshness protection package material, is characterized in that, its component comprises by weight:
2. a kind of starch base modified plastics freshness protection package material according to claim 1, it is characterized in that, the component of starch base modified plastics freshness protection package material comprises by weight:
3. a preparation technology for corresponding to the starch base modified plastics freshness protection package material described in claim 1 or 2 starch base modified plastics freshness protection package material, it is characterized in that, it comprises the steps:
A, adopt described in formula, weigh in the ratio of each component;
B, first by the material of each component at horizontal high-speed mixing machine high-speed mixing 10-20 minute;
C, by the mass transport that mixes to the granulation of parallel equidirectional two-screw forcing machine, produce pellet.
4. the preparation technology of starch base modified plastics freshness protection package material according to claim 3, is characterized in that, in the high-speed mixing process of described processing step b, and high-speed mixing 15 minutes.
5. the preparation technology of starch base modified plastics freshness protection package material according to claim 3, it is characterized in that, after described processing step c, coating materials coiled material produced by pellet on plastic film blowing machine, and coiled material makes plastic packaging bag on plastic bag making machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510032463.0A CN104650447A (en) | 2015-01-22 | 2015-01-22 | Starch-based modified plastic freshness-preservation bag material and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510032463.0A CN104650447A (en) | 2015-01-22 | 2015-01-22 | Starch-based modified plastic freshness-preservation bag material and preparation process thereof |
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| Publication Number | Publication Date |
|---|---|
| CN104650447A true CN104650447A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510032463.0A Pending CN104650447A (en) | 2015-01-22 | 2015-01-22 | Starch-based modified plastic freshness-preservation bag material and preparation process thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854299A (en) * | 2016-12-11 | 2017-06-16 | 钦州学院 | A kind of starch-modified plasticizing adjuvant and preparation method thereof |
| CN107372796A (en) * | 2017-08-15 | 2017-11-24 | 巢湖美维食品有限公司 | A kind of lotus rhizome storage freshness protection package and its preservation method |
| CN107501630A (en) * | 2017-08-15 | 2017-12-22 | 巢湖美维食品有限公司 | A kind of sweet potato storage freshness protection package and its preservation method |
-
2015
- 2015-01-22 CN CN201510032463.0A patent/CN104650447A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106854299A (en) * | 2016-12-11 | 2017-06-16 | 钦州学院 | A kind of starch-modified plasticizing adjuvant and preparation method thereof |
| CN107372796A (en) * | 2017-08-15 | 2017-11-24 | 巢湖美维食品有限公司 | A kind of lotus rhizome storage freshness protection package and its preservation method |
| CN107501630A (en) * | 2017-08-15 | 2017-12-22 | 巢湖美维食品有限公司 | A kind of sweet potato storage freshness protection package and its preservation method |
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Application publication date: 20150527 |