CN113912891A - Preparation process of degradable preservative paper - Google Patents
Preparation process of degradable preservative paper Download PDFInfo
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- CN113912891A CN113912891A CN202111324894.6A CN202111324894A CN113912891A CN 113912891 A CN113912891 A CN 113912891A CN 202111324894 A CN202111324894 A CN 202111324894A CN 113912891 A CN113912891 A CN 113912891A
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- 230000002335 preservative effect Effects 0.000 title claims abstract description 82
- 239000003755 preservative agent Substances 0.000 title claims abstract description 79
- 238000002360 preparation method Methods 0.000 title claims abstract description 27
- 235000013325 dietary fiber Nutrition 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 24
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 238000005520 cutting process Methods 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims description 111
- 239000010410 layer Substances 0.000 claims description 92
- 239000011248 coating agent Substances 0.000 claims description 83
- 238000000576 coating method Methods 0.000 claims description 83
- 238000003756 stirring Methods 0.000 claims description 59
- 238000002156 mixing Methods 0.000 claims description 57
- 238000001035 drying Methods 0.000 claims description 49
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 43
- 239000000123 paper Substances 0.000 claims description 41
- 239000008367 deionised water Substances 0.000 claims description 38
- 229910021641 deionized water Inorganic materials 0.000 claims description 38
- 229920002472 Starch Polymers 0.000 claims description 31
- 238000006243 chemical reaction Methods 0.000 claims description 30
- 150000004676 glycans Chemical class 0.000 claims description 29
- 239000008107 starch Substances 0.000 claims description 28
- 235000019698 starch Nutrition 0.000 claims description 28
- 229920001282 polysaccharide Polymers 0.000 claims description 27
- 239000005017 polysaccharide Substances 0.000 claims description 27
- 244000017020 Ipomoea batatas Species 0.000 claims description 26
- 235000002678 Ipomoea batatas Nutrition 0.000 claims description 26
- -1 polypropylene Polymers 0.000 claims description 21
- 238000004321 preservation Methods 0.000 claims description 21
- 239000004970 Chain extender Substances 0.000 claims description 20
- 239000003963 antioxidant agent Substances 0.000 claims description 20
- 230000003078 antioxidant effect Effects 0.000 claims description 20
- 229920002085 Dialdehyde starch Polymers 0.000 claims description 15
- 229920000881 Modified starch Polymers 0.000 claims description 15
- 239000004368 Modified starch Substances 0.000 claims description 15
- 239000004743 Polypropylene Substances 0.000 claims description 15
- 239000007822 coupling agent Substances 0.000 claims description 15
- 235000019426 modified starch Nutrition 0.000 claims description 15
- 229920001155 polypropylene Polymers 0.000 claims description 15
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 239000013543 active substance Substances 0.000 claims description 13
- 239000011259 mixed solution Substances 0.000 claims description 10
- 239000003761 preservation solution Substances 0.000 claims description 8
- 125000000524 functional group Chemical group 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000002356 single layer Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 5
- 239000002131 composite material Substances 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 238000000227 grinding Methods 0.000 claims description 5
- 230000007246 mechanism Effects 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- 238000009210 therapy by ultrasound Methods 0.000 claims description 5
- 239000002253 acid Substances 0.000 claims description 4
- 230000001588 bifunctional effect Effects 0.000 claims description 4
- 239000012948 isocyanate Substances 0.000 claims description 4
- 229920002261 Corn starch Polymers 0.000 claims description 3
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 claims description 3
- 239000004386 Erythritol Substances 0.000 claims description 3
- UNXHWFMMPAWVPI-UHFFFAOYSA-N Erythritol Natural products OCC(O)C(O)CO UNXHWFMMPAWVPI-UHFFFAOYSA-N 0.000 claims description 3
- 229930195725 Mannitol Natural products 0.000 claims description 3
- 239000008120 corn starch Substances 0.000 claims description 3
- 150000002118 epoxides Chemical class 0.000 claims description 3
- 235000019414 erythritol Nutrition 0.000 claims description 3
- UNXHWFMMPAWVPI-ZXZARUISSA-N erythritol Chemical compound OC[C@H](O)[C@H](O)CO UNXHWFMMPAWVPI-ZXZARUISSA-N 0.000 claims description 3
- 229940009714 erythritol Drugs 0.000 claims description 3
- 239000000594 mannitol Substances 0.000 claims description 3
- 235000010355 mannitol Nutrition 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229920001592 potato starch Polymers 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- 235000010356 sorbitol Nutrition 0.000 claims description 3
- 229940100445 wheat starch Drugs 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- 239000012190 activator Substances 0.000 claims description 2
- 239000011087 paperboard Substances 0.000 claims description 2
- 230000015556 catabolic process Effects 0.000 abstract description 14
- 238000006731 degradation reaction Methods 0.000 abstract description 14
- 244000005700 microbiome Species 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 5
- 230000009471 action Effects 0.000 abstract description 2
- 238000009920 food preservation Methods 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 235000013305 food Nutrition 0.000 description 4
- 230000007547 defect Effects 0.000 description 2
- 235000013399 edible fruits Nutrition 0.000 description 2
- 150000004804 polysaccharides Polymers 0.000 description 2
- 235000011888 snacks Nutrition 0.000 description 2
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000011990 functional testing Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/46—Applications of disintegrable, dissolvable or edible materials
- B65D65/466—Bio- or photodegradable packaging materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D103/00—Coating compositions based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09D103/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/48—Stabilisers against degradation by oxygen, light or heat
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2305/00—Characterised by the use of polysaccharides or of their derivatives not provided for in groups C08J2301/00 or C08J2303/00
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/02—Starch; Degradation products thereof, e.g. dextrin
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2403/00—Characterised by the use of starch, amylose or amylopectin or of their derivatives or degradation products
- C08J2403/04—Starch derivatives
- C08J2403/10—Oxidised starch
-
- 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
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/05—Alcohols; Metal alcoholates
- C08K5/053—Polyhydroxylic alcohols
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
- Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Wood Science & Technology (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Biodiversity & Conservation Biology (AREA)
- Mechanical Engineering (AREA)
- Storage Of Fruits Or Vegetables (AREA)
Abstract
The invention discloses a preparation process of degradable preservative paper, and particularly relates to the technical field of food preservation, which comprises the following steps: step 10, preparing raw materials; step 20, preparing a fresh-keeping solution; step 30, preparing a colloidal film; step 40, preparing a fresh-keeping layer; step 50, rolling; and step 60, cutting. According to the invention, the basic layer colloidal film prepared by the dietary fibers and the plurality of the fresh-keeping layers coated on the surface of the colloidal film are utilized, when the fresh-keeping paper is degraded, the plurality of colloidal films and the basic layer material are separated layer by layer and degraded under the action of microorganisms, the degradation efficiency is higher, and the dietary fibers are degraded by the microorganisms due to the unique structure, so that the degradation rate of the whole fresh-keeping paper is higher, and the whole fresh-keeping paper can be degraded and has high degradation efficiency under the double-tube condition.
Description
Technical Field
The invention relates to the technical field of food preservation, in particular to a preparation process of degradable preservative paper.
Background
The preservation modes of different foods are different, for example, a common mode for preserving fruits is to preserve the moisture of the fruits, the preservation modes of cakes and meats are different, the food of some snacks needs to use preservation paper, and young people love various snacks at present, so the use demand of the preservation paper is more and more increased.
The preservative paper can protect the freshness of food and is widely favored by food manufacturers, but still has more defects, for example, as the use requirement of the preservative paper is more and more large, the existing preservative paper is more difficult to treat after use, because the degradation of the preservative paper is more difficult, the degradation degree is poor, and the degradation time is long, therefore, a preparation process of the degradable preservative paper is provided to solve the problems.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a preparation process of degradable preservative paper, which includes preparing a base colloidal film from dietary fibers and coating a plurality of preservative layers on the surface of the colloidal film, so that the entire preservative paper can be degraded and has high degradation efficiency.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of degradable preservative paper is characterized by comprising the following steps: the method specifically comprises the following steps:
step 10: preparing raw materials, namely preparing the following raw materials in parts by weight: 20-30 parts of crop starch, sufficient deionized water, 30-40 parts of sweet potatoes, 5-10 parts of glycerol, 5-10 parts of dialdehyde starch, 3-5 parts of antioxidant, 3-5 parts of activator, 4-6 parts of chain extender, 5-10 parts of polypropylene resin and 6-8 parts of coupling agent;
step 20: preparing a fresh-keeping solution, namely preparing 20-30 parts of crop starch prepared in the step 10, sufficient deionized water, 3-5 parts of antioxidant, 3-5 parts of active agent, 4-6 parts of chain extender, 5-10 parts of polypropylene resin and 6-8 parts of coupling agent in a series of steps to obtain the fresh-keeping solution for keeping fresh;
step 30: preparing a colloidal film, namely extracting dietary fibers in sweet potatoes from 30-40 parts of sweet potatoes, 5-10 parts of glycerol and 5-10 parts of dialdehyde starch, decomposing the dietary fibers to obtain a polysaccharide solution, and further preparing the polysaccharide solution into the colloidal film;
step 40: preparing a fresh-keeping layer, coating the colloidal film prepared in the step 30 with the fresh-keeping solution prepared in the step 20, and coating the colloidal film in multiple layers to coat 10 layers of fresh-keeping layers on the surface of the colloidal film so as to obtain a mixed film;
step 50: rolling, namely placing the mixed film generated in the step 40 into rolling equipment, and placing the mixed film with higher thickness into the rolling equipment for extrusion, so that the mixed film becomes thinner, and the hardness of the mixed film is increased, thereby forming a paper-shaped plate;
step 60: and cutting, namely cutting the paper-like board generated in the step 50 into a specified shape according to the shape of the package so as to facilitate subsequent use.
In a preferred embodiment, the specific preparation steps in step 20 are as follows:
step 201: modifying raw materials, namely adding 20-30 parts of crop starch and sufficient deionized water into a reaction kettle, mixing uniformly, continuously adding 3-5 parts of an active agent into the reaction kettle, stirring and mixing, performing constant temperature full reaction, continuously adding 3-5 parts of an antioxidant into the reaction kettle after full reaction, and generating a modified starch solution after full reaction;
step 202: adding functional groups, adding the modified starch solution generated in the step 201 into a mixing kettle, continuously adding sufficient deionized water into the mixing kettle for mixing, continuously adding 4-6 parts of chain extender into the mixing kettle after mixing, and continuously stirring and mixing to generate a mixed solution;
step 203: and (3) generating a final solution, injecting the mixed solution generated in the step (202) into a stirring kettle, further adding 5-10 parts of polypropylene resin and 6-8 parts of coupling agent, controlling a stirring mechanism in the stirring kettle to stir clockwise, controlling the stirring speed to be 30-40r/min, stirring for 35-40 minutes, and standing for a period of time to obtain the fresh-keeping solution.
In a preferred embodiment, the specific preparation steps in step 30 are as follows:
step 301: preparing dietary fiber, namely cleaning and soaking sweet potatoes serving as a raw material, and then crushing and grinding the sweet potatoes to obtain the dietary fiber;
step 302: preparing a polysaccharide solution, injecting the dietary fiber prepared in the step 201 into a mixing kettle, injecting sufficient deionized water into the mixing kettle, controlling the water temperature to be 30-40 ℃, and performing ultrasonic treatment for 2-3 hours to generate the polysaccharide solution;
step 303: preparing a base layer solution, continuously adding 5-10 parts of glycerol and 5-10 parts of dialdehyde starch into the polysaccharide solution prepared in the step 203, stirring in the anticlockwise direction, controlling the stirring speed to be 350-400r/min and the stirring time to be 45-55 minutes to generate the base layer solution
Step 304: preparing a base layer, coating the base layer solution prepared in the step 203 on a coating plate, drying the solution on the coating plate, controlling the drying time to be 30-40 minutes, and performing shedding treatment after drying to obtain a colloidal film.
In a preferred embodiment, the ratio of the modified starch solution to the deionized water in the step 202 is 1:3.5-1:5 by weight, and the crop starch and the deionized water are mixed by injecting at intervals in a counterclockwise direction and stirring.
In a preferred embodiment, the crop starch in step 202 is selected from one or more of potato starch, wheat starch and corn starch.
In a preferred embodiment, the antioxidant added in step 201 is one or more selected from sorbitol, mannitol and erythritol.
In a preferred embodiment, the chain extender in step 203 is one or a mixture of more of bifunctional acid derivatives, isocyanate compounds, anhydride compounds and epoxides.
In a preferred embodiment, the specific operation steps of the step 40 are as follows:
step 401: performing single-layer coating, namely flatly coating the colloidal film prepared in the step 30 on a drying plate, and coating the preservation solution prepared in the step 20 on the colloidal film through coating equipment to enable the preservation solution to be adhered to the upper part of the colloidal film;
step 402: drying, namely placing the colloidal film with the preservative solution prepared in the step 401 in a dryer for drying, wherein the drying time is controlled to be 30-40 minutes, and taking out the colloidal film after drying to form a preservative layer on the surface of the colloidal film;
step 403: multilayer coating, namely continuously coating a preservative solution on the preservative layer of the colloidal film adhered with a preservative film, drying to obtain two preservative layers, further coating, and repeatedly performing operation until 10 preservative layers are generated to obtain a composite film;
in a preferred embodiment, the coating operation in step 401 is specifically to place the jelly-like film on a coating production line, and apply the preservative solution to the surface of the jelly-like film at the coating position by using a coating roller.
In a preferred embodiment, the thickness of each fresh keeping layer in step 40 is set to be 5-8 mm, and the thickness of the paperboard in step 50 is set to be 10-15 mm.
The invention has the technical effects and advantages that:
1. according to the invention, the base layer colloidal film prepared by the dietary fibers and the plurality of fresh-keeping layers coated on the surface of the colloidal film are utilized, when the fresh-keeping paper is degraded, the plurality of colloidal films and the base layer material are separated layer by layer and degraded under the action of microorganisms, the degradation efficiency is higher, and the polysaccharide solution formed by the dietary fibers is used as a main body of the base layer colloidal film, and the dietary fibers are conveniently degraded by the microorganisms due to the unique structure of the dietary fibers, so that the degradation rate of the whole fresh-keeping paper is higher, and the whole fresh-keeping paper can be degraded and has high degradation efficiency under the condition of double pipes;
2. the invention takes the easily degradable dietary fiber as the main material of the preservative paper, takes the polysaccharide structure of the dietary fiber as the base layer colloidal film of the preservative paper, and coats a plurality of layers of modified preservative solution on the base layer colloidal film, so that the modified preservative solution forms a plurality of layers of preservative layers, the surface of the modified preservative solution is connected with the free functional groups, thereby forming the preservative layer with better preservative effect, and the preservative effect is realized by utilizing the base layer colloidal film and the preservative layer coated on the surface of the base layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
a preparation process of degradable preservative paper is characterized by comprising the following steps: the method specifically comprises the following steps:
step 10: preparing raw materials, namely preparing the following raw materials in parts by weight: 20 parts of crop starch, sufficient deionized water, 30 parts of sweet potatoes, 5 parts of glycerol, 5 parts of dialdehyde starch, 3 parts of antioxidant, 3 parts of active agent, 4 parts of chain extender, 5 parts of polypropylene resin and 6 parts of coupling agent;
step 20: preparing a fresh-keeping solution, namely preparing 20 parts of crop starch, enough deionized water, 3 parts of antioxidant, 3 parts of active agent, 4 parts of chain extender, 5 parts of polypropylene resin and 6 parts of coupling agent prepared in the step 10 in a series of steps to obtain the fresh-keeping solution for keeping fresh, and specifically comprising the following operation steps:
step 201: modifying raw materials, namely adding 20 parts of crop starch and sufficient deionized water into a reaction kettle, mixing uniformly, continuously adding 3 parts of an active agent into the reaction kettle, stirring and mixing, keeping the temperature constant, performing full reaction, continuously adding 3 parts of an antioxidant into the reaction kettle after full reaction, and generating a modified starch solution after full reaction, wherein the antioxidant is sorbitol;
step 202: adding functional groups, adding the modified starch solution generated in the step 201 into a mixing kettle, continuously adding sufficient deionized water into the mixing kettle for mixing, wherein the weight part ratio of the modified starch solution to the deionized water is 1:3.5, the mixing mode of the crop starch and the deionized water is that the crop starch and the deionized water are injected at intervals in a counterclockwise direction, stirring and mixing are carried out, after mixing, 4 parts of chain extender is continuously added into the mixing kettle, and stirring and mixing are continuously carried out to generate a mixed solution, wherein the crop starch is potato starch;
step 203: generating a final solution, injecting the mixed solution generated in the step 202 into a stirring kettle, further adding 5 parts of polypropylene resin and 6 parts of coupling agent, controlling a stirring mechanism in the stirring kettle to stir clockwise, controlling the stirring speed to be 30r/min, stirring for 35 minutes, and standing for a period of time to obtain a fresh-keeping solution, wherein the chain extender is a bifunctional acid derivative and an isocyanate compound;
step 30: preparing a colloidal film, namely extracting dietary fibers in sweet potatoes by using 30 parts of sweet potatoes, 5 parts of glycerol and 5 parts of dialdehyde starch, decomposing the dietary fibers to obtain a polysaccharide solution, and further preparing the polysaccharide solution into the colloidal film, wherein the specific operation steps are as follows:
step 301: preparing dietary fiber, namely cleaning and soaking sweet potatoes serving as a raw material, and then crushing and grinding the sweet potatoes to obtain the dietary fiber;
step 302: preparing a polysaccharide solution, injecting the dietary fiber prepared in the step 201 into a mixing kettle, injecting sufficient deionized water into the mixing kettle, controlling the water temperature to be 30 ℃, and performing ultrasonic treatment for 2 hours to generate the polysaccharide solution;
step 303: preparing a base layer solution, continuously adding 5 parts of glycerol and 5 parts of dialdehyde starch into the polysaccharide solution prepared in the step 203, stirring in a counterclockwise direction, controlling the stirring speed to be 350r/min and the stirring time to be 45 minutes, and generating the base layer solution;
step 304: preparing a base layer, coating the base layer solution prepared in the step 203 on a coating plate, drying the solution on the coating plate, controlling the drying time to be 30 minutes, and performing falling-off treatment after drying to obtain a colloidal film;
step 40: preparing a preservative layer, coating the preservative solution prepared in the step 20 on the colloidal film prepared in the step 30, and coating the colloidal film in a multi-layer manner to coat 10 layers of preservative layers on the surface of the colloidal film, thereby obtaining the mixed film, wherein the specific operation steps are as follows:
step 401: performing single-layer coating, namely flatly coating the colloidal film prepared in the step 30 on a drying plate, and coating the fresh-keeping solution prepared in the step 20 on the colloidal film through coating equipment to enable the fresh-keeping solution to be adhered to the upper part of the colloidal film, wherein the specific operation during coating is to place the colloidal film on a coating production line and coat the fresh-keeping solution on the surface of the colloidal film by using a coating roller at a coating position;
step 402: drying, namely placing the colloidal film with the preservative solution prepared in the step 401 in a dryer for drying, wherein the drying time is controlled to be 30 minutes, the colloidal film is taken out after drying, a preservative layer is formed on the surface of the colloidal film, and the thickness of each preservative layer is set to be 5 millimeters;
step 403: and (3) multi-layer coating, namely continuously coating the preservation layer adhered with the colloidal film of the preservation film with preservation solution, then drying to obtain two preservation layers after drying, further coating, and repeatedly operating until 10 preservation layers are generated to obtain the composite film.
Step 50: rolling, namely placing the mixed film generated in the step 40 into rolling equipment, and placing the mixed film with higher thickness into the rolling equipment for extrusion, so that the mixed film becomes thinner, and the hardness of the mixed film is increased, thereby forming a paper-shaped plate, wherein the thickness of the paper-shaped plate is set to be 10 mm;
step 60: and cutting, namely cutting the paper-like board generated in the step 50 into a specified shape according to the shape of the package so as to facilitate subsequent use.
Example 2:
a preparation process of degradable preservative paper is characterized by comprising the following steps: the method specifically comprises the following steps:
step 10: preparing raw materials, namely preparing the following raw materials in parts by weight: 25 parts of crop starch, sufficient deionized water, 35 parts of sweet potatoes, 8 parts of glycerol, 8 parts of dialdehyde starch, 4 parts of antioxidant, 4 parts of active agent, 5 parts of chain extender, 8 parts of polypropylene resin and 7 parts of coupling agent;
step 20: preparing a fresh-keeping solution, namely preparing 25 parts of crop starch, enough deionized water, 4 parts of antioxidant, 4 parts of active agent, 5 parts of chain extender, 8 parts of polypropylene resin and 7 parts of coupling agent prepared in the step 10 in a series of steps to obtain the fresh-keeping solution for keeping fresh, and specifically comprising the following operation steps:
step 201: modifying raw materials, namely adding 25 parts of crop starch and sufficient deionized water into a reaction kettle, mixing uniformly, continuously adding 4 parts of active agent into the reaction kettle, stirring and mixing, keeping the temperature constant, carrying out full reaction, continuously adding 4 parts of antioxidant into the reaction kettle after full reaction, and generating a modified starch solution after full reaction, wherein the antioxidant is mannitol;
step 202: adding functional groups, adding the modified starch solution generated in the step 201 into a mixing kettle, continuously adding sufficient deionized water into the mixing kettle for mixing, wherein the weight part ratio of the modified starch solution to the deionized water is 1:4, the mixing mode of the crop starch and the deionized water is that the crop starch and the deionized water are injected at intervals in an anticlockwise direction, stirring and mixing are carried out, after mixing, 5 parts of chain extender is continuously added into the mixing kettle, and the stirring and mixing are continuously carried out to generate a mixed solution, wherein the crop starch is wheat starch;
step 203: generating a final solution, injecting the mixed solution generated in the step 202 into a stirring kettle, further adding 8 parts of polypropylene resin and 7 parts of coupling agent, controlling a stirring mechanism in the stirring kettle to stir clockwise, controlling the stirring speed to be 35r/min, stirring for 38 minutes, and standing for a period of time to obtain a fresh-keeping solution, wherein the chain extender is a mixture of bifunctional acid derivatives and isocyanate compounds;
step 30: preparing a colloidal film, namely extracting dietary fibers in sweet potatoes by using 35 parts of sweet potatoes, 8 parts of glycerol and 8 parts of dialdehyde starch, decomposing the dietary fibers to obtain a polysaccharide solution, and further preparing the polysaccharide solution into the colloidal film, wherein the specific operation steps are as follows:
step 301: preparing dietary fiber, namely cleaning and soaking sweet potatoes serving as a raw material, and then crushing and grinding the sweet potatoes to obtain the dietary fiber;
step 302: preparing a polysaccharide solution, injecting the dietary fiber prepared in the step 201 into a mixing kettle, injecting sufficient deionized water into the mixing kettle, controlling the water temperature to be 35 ℃, and performing ultrasonic treatment for 2.5 hours to generate the polysaccharide solution;
step 303: preparing a base layer solution, continuously adding 8 parts of glycerol and 8 parts of dialdehyde starch into the polysaccharide solution prepared in the step 203, stirring in a counterclockwise direction, controlling the stirring speed to be 380r/min and the stirring time to be 50 minutes to generate the base layer solution
Step 304: preparing a base layer, coating the base layer solution prepared in the step 203 on a coating plate, drying the solution on the coating plate, controlling the drying time to be 35 minutes, and performing falling-off treatment after drying to obtain a colloidal film;
step 40: preparing a preservative layer, coating the preservative solution prepared in the step 20 on the colloidal film prepared in the step 30, and coating the colloidal film in a multi-layer manner to coat 10 layers of preservative layers on the surface of the colloidal film, thereby obtaining the mixed film, wherein the specific operation steps are as follows:
step 401: performing single-layer coating, namely flatly coating the colloidal film prepared in the step 30 on a drying plate, and coating the fresh-keeping solution prepared in the step 20 on the colloidal film through coating equipment to enable the fresh-keeping solution to be adhered to the upper part of the colloidal film, wherein the specific operation during coating is to place the colloidal film on a coating production line and coat the fresh-keeping solution on the surface of the colloidal film by using a coating roller at a coating position;
step 402: drying, namely placing the colloidal film with the preservative solution prepared in the step 401 in a dryer for drying, wherein the drying time is controlled to be 35 minutes, taking out the colloidal film after drying, and forming a preservative layer on the surface of the colloidal film, wherein the thickness of each preservative layer is 7 mm;
step 403: and (3) multi-layer coating, namely continuously coating the preservation layer adhered with the colloidal film of the preservation film with preservation solution, then drying to obtain two preservation layers after drying, further coating, and repeatedly operating until 10 preservation layers are generated to obtain the composite film.
Step 50: rolling, namely placing the mixed film generated in the step 40 into rolling equipment, and placing the mixed film with higher thickness into the rolling equipment for extrusion, so that the mixed film becomes thinner, and the hardness of the mixed film is increased, thereby forming a paper-shaped plate, wherein the thickness of the paper-shaped plate is set to be 13 mm;
step 60: and cutting, namely cutting the paper-like board generated in the step 50 into a specified shape according to the shape of the package so as to facilitate subsequent use.
Example 3:
a preparation process of degradable preservative paper is characterized by comprising the following steps: the method specifically comprises the following steps:
step 10: preparing raw materials, namely preparing the following raw materials in parts by weight: 30 parts of crop starch, sufficient deionized water, 40 parts of sweet potatoes, 10 parts of glycerol, 10 parts of dialdehyde starch, 5 parts of antioxidant, 5 parts of active agent, 6 parts of chain extender, 10 parts of polypropylene resin and 8 parts of coupling agent;
step 20: preparing a fresh-keeping solution, namely preparing 30 parts of crop starch, enough deionized water, 5 parts of antioxidant, 5 parts of active agent, 6 parts of chain extender, 10 parts of polypropylene resin and 8 parts of coupling agent prepared in the step 10 in a series of steps to obtain the fresh-keeping solution for keeping fresh, and specifically comprising the following operation steps:
step 201: modifying raw materials, namely adding 30 parts of crop starch and sufficient deionized water into a reaction kettle, mixing uniformly, continuously adding 5 parts of an active agent into the reaction kettle, stirring and mixing, keeping the temperature constant, performing full reaction, continuously adding 5 parts of an antioxidant into the reaction kettle after full reaction, and generating a modified starch solution after full reaction, wherein the antioxidant is erythritol;
step 202: adding functional groups, adding the modified starch solution generated in the step 201 into a mixing kettle, continuously adding sufficient deionized water into the mixing kettle for mixing, wherein the weight part ratio of the modified starch solution to the deionized water is 1:5, the mixing mode of the crop starch and the deionized water is that the crop starch and the deionized water are injected at intervals in an anticlockwise direction, stirring and mixing are carried out, after mixing, 6 parts of chain extender is continuously added into the mixing kettle, and the stirring and mixing are continuously carried out to generate a mixed solution, wherein the crop starch is selected to be corn starch;
step 203: generating a final solution, injecting the mixed solution generated in the step 202 into a stirring kettle, further adding 10 parts of polypropylene resin and 8 parts of coupling agent, controlling a stirring mechanism in the stirring kettle to stir clockwise, controlling the stirring speed to be 40r/min, stirring for 40 minutes, and standing for a period of time to obtain a fresh-keeping solution, wherein the chain extender is an epoxide;
step 30: preparing a colloidal film, namely extracting dietary fibers in sweet potatoes by using 40 parts of sweet potatoes, 10 parts of glycerol and 10 parts of dialdehyde starch, decomposing the dietary fibers to obtain a polysaccharide solution, and further preparing the polysaccharide solution into the colloidal film, wherein the specific operation steps are as follows:
step 301: preparing dietary fiber, namely cleaning and soaking sweet potatoes serving as a raw material, and then crushing and grinding the sweet potatoes to obtain the dietary fiber;
step 302: preparing a polysaccharide solution, injecting the dietary fiber prepared in the step 201 into a mixing kettle, injecting sufficient deionized water into the mixing kettle, controlling the water temperature to be 40 ℃, and performing ultrasonic treatment for 3 hours to generate the polysaccharide solution;
step 303: preparing a base layer solution, continuously adding 10 parts of glycerol and 10 parts of dialdehyde starch into the polysaccharide solution prepared in the step 203, stirring in the anticlockwise direction, controlling the stirring speed to be 400r/min and the stirring time to be 55 minutes, and generating the base layer solution
Step 304: preparing a base layer, coating the base layer solution prepared in the step 203 on a coating plate, drying the solution on the coating plate, controlling the drying time to be 40 minutes, and performing falling-off treatment after drying to obtain a colloidal film;
step 40: preparing a preservative layer, coating the preservative solution prepared in the step 20 on the colloidal film prepared in the step 30, and coating the colloidal film in a multi-layer manner to coat 10 layers of preservative layers on the surface of the colloidal film, thereby obtaining the mixed film, wherein the specific operation steps are as follows:
step 401: performing single-layer coating, namely flatly coating the colloidal film prepared in the step 30 on a drying plate, and coating the fresh-keeping solution prepared in the step 20 on the colloidal film through coating equipment to enable the fresh-keeping solution to be adhered to the upper part of the colloidal film, wherein the specific operation during coating is to place the colloidal film on a coating production line and coat the fresh-keeping solution on the surface of the colloidal film by using a coating roller at a coating position;
step 402: drying, namely placing the colloidal film with the preservative solution prepared in the step 401 in a dryer for drying, wherein the drying time is controlled to be 40 minutes, taking out the colloidal film after drying, and forming a preservative layer on the surface of the colloidal film, wherein the thickness of each preservative layer is set to be 8 millimeters;
step 403: and (3) multi-layer coating, namely continuously coating the preservation layer adhered with the colloidal film of the preservation film with preservation solution, then drying to obtain two preservation layers after drying, further coating, and repeatedly operating until 10 preservation layers are generated to obtain the composite film.
Step 50: rolling, namely placing the mixed film generated in the step 40 into rolling equipment, and placing the mixed film with higher thickness into the rolling equipment for extrusion, so that the mixed film becomes thinner, and the hardness of the mixed film is increased, thereby forming a paper-shaped plate, wherein the thickness of the paper-shaped plate is set to be 15 mm;
step 60: and cutting, namely cutting the paper-like board generated in the step 50 into a specified shape according to the shape of the package so as to facilitate subsequent use.
Comparative example 1:
the embodiment provides a preparation process of degradable preservative paper, which is different from the embodiment 1 in that: the raw material of sweet potato in example 1 was removed, and the process for preparing dietary fiber was also removed, and the process for preparing other raw materials was kept the same as in example 1.
Comparative example 2:
this example provides another preparation process of degradable preservative paper, which is different from example 1 in that: only single-layer coating is selected, the thickness after coating is controlled to be 10 mm, the jelly-like film is compacted through a rolling device, and the surface of the jelly-like film is smooth.
The following data were obtained by performing a functional test on the degradable preservative papers prepared in examples 1 to 3 and the degradable preservative papers prepared in comparative example 1 and comparative example 2, respectively:
as can be seen from the above table, the raw material mixing ratio in example 2 is moderate, the degradation degree of the preservative paper produced by the preparation process in example 2 is the highest after 30 days, the number of bacterial colonies on the surface of the preservative paper is obviously small after 7 days, the initial browning time of the preservative paper in the use process is the shortest, the weight loss condition is the lowest at 60 days, the easily degradable dietary fiber is used as the main material of the preservative paper, the polysaccharide structure of the dietary fiber is used as the base layer colloidal film of the preservative paper, and the multilayer modified preservative solution is coated on the base layer colloidal film, so that the modified preservative solution forms a multilayer preservative layer, the surface of the modified preservative solution is connected with the free functional groups, thereby forming a preservative layer with a good preservation effect, and the preservative effect is achieved by using the base layer colloidal film and the preservative layer coated on the surface of the base layer.
When degrading, because under the effect of microorganism, multilayer colloidal film and basic unit material can be under the effect of microorganism, divide and degrade layer by layer, degradation efficiency is higher to because basic unit colloidal film utilizes the polysaccharide solution that dietary fiber formed as the main part, dietary fiber is convenient for be degraded by the microorganism because its unique structure, thereby makes the degradation rate of whole preservative paper higher, and the double-barrelled is together, makes whole preservative paper not only can degrade and degradation efficiency is high.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.
Claims (10)
1. A preparation process of degradable preservative paper is characterized by comprising the following steps: the method specifically comprises the following steps:
step 10: preparing raw materials, namely preparing the following raw materials in parts by weight: 20-30 parts of crop starch, sufficient deionized water, 30-40 parts of sweet potatoes, 5-10 parts of glycerol, 5-10 parts of dialdehyde starch, 3-5 parts of antioxidant, 3-5 parts of activator, 4-6 parts of chain extender, 5-10 parts of polypropylene resin and 6-8 parts of coupling agent;
step 20: preparing a fresh-keeping solution, namely preparing 20-30 parts of crop starch prepared in the step 10, sufficient deionized water, 3-5 parts of antioxidant, 3-5 parts of active agent, 4-6 parts of chain extender, 5-10 parts of polypropylene resin and 6-8 parts of coupling agent in a series of steps to obtain the fresh-keeping solution for keeping fresh;
step 30: preparing a colloidal film, namely extracting dietary fibers in sweet potatoes from 30-40 parts of sweet potatoes, 5-10 parts of glycerol and 5-10 parts of dialdehyde starch, decomposing the dietary fibers to obtain a polysaccharide solution, and further preparing the polysaccharide solution into the colloidal film;
step 40: preparing a fresh-keeping layer, coating the colloidal film prepared in the step 30 with the fresh-keeping solution prepared in the step 20, and coating the colloidal film in multiple layers to coat 10 layers of fresh-keeping layers on the surface of the colloidal film so as to obtain a mixed film;
step 50: rolling, namely placing the mixed film generated in the step 40 into rolling equipment, and placing the mixed film with higher thickness into the rolling equipment for extrusion, so that the mixed film becomes thinner, and the hardness of the mixed film is increased, thereby forming a paper-shaped plate;
step 60: and cutting, namely cutting the paper-like board generated in the step 50 into a specified shape according to the shape of the package so as to facilitate subsequent use.
2. The preparation process of degradable preservative paper according to claim 1, characterized in that: the specific preparation steps in the step 20 are as follows:
step 201: modifying raw materials, namely adding 20-30 parts of crop starch and sufficient deionized water into a reaction kettle, mixing uniformly, continuously adding 3-5 parts of an active agent into the reaction kettle, stirring and mixing, performing constant temperature full reaction, continuously adding 3-5 parts of an antioxidant into the reaction kettle after full reaction, and generating a modified starch solution after full reaction;
step 202: adding functional groups, adding the modified starch solution generated in the step 201 into a mixing kettle, continuously adding sufficient deionized water into the mixing kettle for mixing, continuously adding 4-6 parts of chain extender into the mixing kettle after mixing, and continuously stirring and mixing to generate a mixed solution;
step 203: and (3) generating a final solution, injecting the mixed solution generated in the step (202) into a stirring kettle, further adding 5-10 parts of polypropylene resin and 6-8 parts of coupling agent, controlling a stirring mechanism in the stirring kettle to stir clockwise, controlling the stirring speed to be 30-40r/min, stirring for 35-40 minutes, and standing for a period of time to obtain the fresh-keeping solution.
3. The preparation process of degradable preservative paper according to claim 1, characterized in that: the specific preparation steps in step 30 are as follows:
step 301: preparing dietary fiber, namely cleaning and soaking sweet potatoes serving as a raw material, and then crushing and grinding the sweet potatoes to obtain the dietary fiber;
step 302: preparing a polysaccharide solution, injecting the dietary fiber prepared in the step 201 into a mixing kettle, injecting sufficient deionized water into the mixing kettle, controlling the water temperature to be 30-40 ℃, and performing ultrasonic treatment for 2-3 hours to generate the polysaccharide solution;
step 303: preparing a base layer solution, continuously adding 5-10 parts of glycerol and 5-10 parts of dialdehyde starch into the polysaccharide solution prepared in the step 203, stirring in the anticlockwise direction, controlling the stirring speed to be 350-400r/min and the stirring time to be 45-55 minutes to generate the base layer solution
Step 304: preparing a base layer, coating the base layer solution prepared in the step 203 on a coating plate, drying the solution on the coating plate, controlling the drying time to be 30-40 minutes, and performing shedding treatment after drying to obtain a colloidal film.
4. The preparation process of degradable preservative paper according to claim 2, characterized in that: in the step 202, the weight part ratio of the modified starch solution to the deionized water is 1:3.5-1:5, and the crop starch and the deionized water are injected at intervals in a counterclockwise direction and are stirred and mixed.
5. The preparation process of degradable preservative paper according to claim 2, characterized in that: the crop starch in step 202 may be selected from one or more of potato starch, wheat starch and corn starch.
6. The preparation process of degradable preservative paper according to claim 2, characterized in that: the antioxidant added in step 201 is one or more selected from sorbitol, mannitol and erythritol.
7. The preparation process of degradable preservative paper according to claim 1, characterized in that: in the step 203, the chain extender is one or a mixture of more of bifunctional acid derivatives, isocyanate compounds, anhydride compounds and epoxides.
8. The preparation process of degradable preservative paper according to claim 1, characterized in that: the specific operation steps of the step 40 are as follows:
step 401: performing single-layer coating, namely flatly coating the colloidal film prepared in the step 30 on a drying plate, and coating the preservation solution prepared in the step 20 on the colloidal film through coating equipment to enable the preservation solution to be adhered to the upper part of the colloidal film;
step 402: drying, namely placing the colloidal film with the preservative solution prepared in the step 401 in a dryer for drying, wherein the drying time is controlled to be 30-40 minutes, and taking out the colloidal film after drying to form a preservative layer on the surface of the colloidal film;
step 403: and (3) multi-layer coating, namely continuously coating the preservation layer adhered with the colloidal film of the preservation film with preservation solution, then drying to obtain two preservation layers after drying, further coating, and repeatedly operating until 10 preservation layers are generated to obtain the composite film.
9. The preparation process of degradable preservative paper according to claim 8, characterized in that: the coating operation in step 401 is specifically to place the colloidal film on a coating production line, and coat the surface of the colloidal film with a fresh-keeping solution at the coating position by using a coating roller.
10. The preparation process of degradable preservative paper according to claim 1, characterized in that: the thickness of each fresh-keeping layer in the step 40 is set to be 5-8 mm, and the thickness of the paperboard in the step 50 is set to be 10-15 mm.
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| CN114851582A (en) * | 2022-05-11 | 2022-08-05 | 衢州学院 | Coating process of shading preservative paper |
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