CN110527458B - Application and processing method of cassava whole powder - Google Patents
Application and processing method of cassava whole powder Download PDFInfo
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- CN110527458B CN110527458B CN201910881997.9A CN201910881997A CN110527458B CN 110527458 B CN110527458 B CN 110527458B CN 201910881997 A CN201910881997 A CN 201910881997A CN 110527458 B CN110527458 B CN 110527458B
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- 238000000227 grinding Methods 0.000 description 1
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J103/00—Adhesives based on starch, amylose or amylopectin or on their derivatives or degradation products
- C09J103/02—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
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
-
- 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
-
- 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
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Paper (AREA)
Abstract
The invention relates to the technical field of glue, in particular to application of cassava whole powder and a processing method thereof. According to the invention, the cassava powder is used for replacing the traditional pure starch, the glue is prepared from the cassava powder containing the fibers, the prepared cassava powder glue is high in bonding strength, the steam is saved, the phenomenon of false adhesion or glue failure can be avoided when the cassava powder glue is used for producing the corrugated board, the fibers in the cassava powder can effectively improve the compression resistance of the corrugated board, the speed of the corrugated board is improved, and the processing quality of the corrugated board is stable. A processing method of cassava whole powder comprises the following steps: removing impurities, namely cleaning the surface of fresh cassava to remove impurities; slicing or shredding, and drying in the sun or oven to control the water content of cassava within 15%; crushing, namely crushing the dry cassava or the dry cassava slices by using a crusher to prepare the cassava powder. The processing method of the cassava flour is simple, the production efficiency is high, the cassava residues in the cassava flour do not need to be removed, waste is turned into wealth, the consumption of raw materials for preparing the glue is greatly reduced, and the processing cost of a corrugated board production line is favorably reduced.
Description
Technical Field
The invention relates to the technical field of glue, in particular to application of cassava whole powder and a processing method thereof.
Background
The traditional glue for the paperboard generally uses corn and cassava starch as main raw materials, and is added with sodium hydroxide, reinforcing agent, borax and other auxiliary materials to form the corn starch glue. But the bonding performance of the corn starch glue is still not ideal, the bonding effect of the prepared paperboard product is poor, and the prepared paperboard product is not suitable for the requirement of high-speed production of modern paperboard lines. The production of modern corrugated board requires that the starch glue has the following properties: 1. the environment is protected, no toxicity, no smell and no pollution to the environment are realized; 2. the adhesive strength and the edge pressure strength of the paperboard are improved; 3. the method is suitable for the production requirement of modern paperboard lines at high speed.
Aiming at the defects of the existing starch glue, the invention patent with the Chinese patent publication number of CN109810650A discloses a cassava starch glue for cartons and a production method thereof, and the invention patent discloses the cassava starch glue which comprises the following components in percentage by mass: 1100 parts of water; 300-350 parts of cassava starch; 23-30 parts of alkali liquor; 4.5-5.5 parts of borax; 4-12 parts of a stabilizer; 10-12 parts of an additive. The starch glue adopts cassava starch as a main raw material, can meet the production requirements of modern corrugated boards to a certain extent, and can improve the viscosity of the glue, but the viscosity of the glue in the traditional processing, also called as flow rate, is calculated by taking seconds as a unit when the glue flows out under the condition of fixed quality glue to flow to a position of a marker post. That is, the "viscosity" of the existing starch glue is only an index of fluidity, not an index of adhesive strength, and therefore, the existing starch glue has low adhesive strength, and when the glue is applied to the production of paperboards, the phenomenon of false adhesion or glue failure is easy to occur. In addition, the existing starch glue is not beneficial to improving the compression resistance of the paperboard when being applied to paperboard production and processing, so that the processing quality of the paperboard is difficult to improve, and the application range of the existing starch glue is limited.
Disclosure of Invention
The invention aims to provide the application of the cassava powder, the cassava powder is used for preparing glue instead of the traditional cassava starch, the prepared cassava powder glue is high in bonding strength, saves steam, can avoid the phenomenon of false adhesion or glue opening when used for producing the paperboard, and the fibers in the cassava powder can effectively improve the compression resistance of the corrugated board, improve the speed of the paperboard and stabilize the processing quality of the paperboard.
The invention also aims to provide a processing method of the cassava flour, which has the advantages of simple process and high production efficiency, does not need to remove cassava dregs (the main component is fiber) in the cassava flour, changes waste into valuable, does not discharge waste residues and waste water, is more environment-friendly, greatly reduces the consumption of raw materials for preparing glue, and is favorable for reducing the processing cost of a corrugated board production line.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows.
The application of the cassava powder disclosed by the invention is to apply the cassava powder to the preparation of glue. The cassava powder is used as a main raw material for preparing the glue, the traditional pure starch is replaced, the prepared cassava powder glue is high in bonding strength, when the cassava powder glue is used for producing the paperboard, a boiler can reduce 1-2 air pressures, the phenomenon of false adhesion or glue failure can be avoided, fibers in the cassava powder can effectively improve the compression resistance of the corrugated paperboard, the vehicle speed is improved, and the paperboard processing quality is stable.
Preferably, the pH value of the cassava whole powder glue is 7.0-7.5, the cassava whole powder glue can be prepared by adopting a traditional starch glue preparation method, the process and other additive materials are mature, and the cassava whole powder glue is beneficial to large-scale production, processing and utilization.
Adding pure starch into the cassava powder for preparing glue, wherein the weight percentage of the cassava powder and the pure starch is as follows:
30 to 70 percent of cassava powder
30 to 70 percent of pure starch
The pure starch is at least one of tapioca starch, corn starch and wheat starch. Specifically, the pure starch is tapioca starch, corn starch or wheat starch.
Preferably, the glue prepared from the cassava flour is applied to a corrugated board adhesive (glue making on a paperboard production line), a plywood glue, a paper-making surface-mounting glue, a paper-mounting glue or a paper tube glue. The adhesive can be particularly applied to paper-making mounting surface gluing (drying after surface gluing such as kraft paper and the like), corrugated board production line glue adhesion, furniture splint adhesion and adhesion of paper, corrugated boards or related paper products. Specifically, the addition amount of the cassava powder is 35-90% of the total weight of the solid content of the glue formula, and the rest raw materials of the glue formula are conventional auxiliary materials.
The adhesive for paper tube (paper tube) is commonly called paper tube adhesive, etc. and is a special adhesive for making various paper tubes, paper cans and related paper products. The paper, cloth, plastic film, metal foil and other soft materials are usually wound into bundles by paper tubes (paper tubes) to be made into paper tube core roll-shaped finished products. These paper tubes are typically made by rolling and gluing kraft paper or other paper-based machinery, and the adhesive used is called tube glue.
More preferably, the main component of the corrugated board adhesive glue is cassava powder, and the corrugated board adhesive glue also comprises caustic soda, borax and water. In the cassava flour glue of the invention, the dosage of each material can refer to the dosage of the existing starch glue. Specifically, the weight ratio of the water to the cassava whole powder is 2-3.5:1, and the weight ratio of the cassava whole powder to the caustic soda is 50: 0.9-1.2, wherein the weight ratio of the cassava powder to the borax is 50: 0-0.45.
Preferably, the cassava whole powder has the quality indexes of 0.5-1.8% of ash, 55-78% of starch, 65-88% of whiteness and 500-900BU of viscosity. BU (brabender), which is the starch viscosity unit. Preferably, the ash content is 0.8-1.2%, the starch content is 55-70%, the whiteness is 70-80%, and the viscosity is 600-.
Preferably, the cassava powder contains or is added with cassava fibers.
Preferably, the cassava powder contains cassava fibers, and the content of the cassava fibers is more than 2% of the weight of the cassava powder.
More preferably, the content of the fiber in the cassava flour is 2-40% of the weight of the cassava flour. Specifically, the content of the fiber in the cassava powder is 5%, 10%, 15%, 20%, 25%, 30% and 35% of the weight of the cassava powder. Further preferably, the content of the cassava fiber is 8-15% of the weight of the cassava whole powder. If the fiber content exceeds 40%, the fluidity of the glue is reduced, so that the viscosity of the glue is reduced, and if the fiber content is lower than 2%, the compression resistance of the corrugated board cannot be improved. Through a large number of analyses and experimental verification, the inventor finds that when the content of the cassava fiber is 8-15% of the weight of the cassava powder, the prepared cassava powder glue has the most excellent bonding property and pressure resistance when being applied to paperboard processing.
Preferably, the cassava fibers are added into the cassava powder, and the adding amount of the cassava fibers is 1-20% of the weight of the cassava powder, preferably 5-20%.
Preferably, the cassava powder is further added with an additive, and the addition amount of the additive is 0.5-3% of the weight of the cassava powder. Preferably, the additive is added in an amount of 1%, 1.5%, 2%, 2.5% or 3% by weight of the cassava flour.
More preferably, the additive is at least one of a flow aid, a suspending agent, a bridging agent and a stabilizing agent. Specifically, the addition amount of the flow aid is 0.5-2.5% of the weight of the cassava powder, the addition amount of the suspending agent is 0.5-2.5% of the weight of the cassava powder, and the addition amounts of the bridging agent and the stabilizing agent are 0.05-1% of the weight of the cassava powder.
Specifically, the flow aid or the suspending agent is one or a mixture of a plant additive, polyvinyl alcohol and cellulose mixed in any proportion. The plant additive is pregelatinized starch, cooked flour, cooked rice flour or plant gelatine powder. The flow aid/suspending agent is added, so that the fluidity of the cassava whole powder glue is improved, the viscosity of the glue is not reduced, and the bonding strength of the glue is improved. In addition, the suspending agents such as pregelatinized starch, polyvinyl alcohol or cellulose can also wrap and seal protein and powdered sugar contained in the cassava flour, so that the glue does not foam and is not easy to deteriorate in the preparation process, and the quality and the storage life of the cassava flour glue are favorably improved.
The bridging agent generates bridging reaction with starch molecular weight in the glue making process to form a solidification effect with stable key joint, increases the viscosity of glue and the viscosity of a paperboard, has certain waterproofness, and is beneficial to improving the moisture resistance of the corrugated paperboard.
The stabilizer is also called a stabilizer and plays a role in controlling the viscosity rise of the glue and stabilizing the viscosity in the glue making process.
The invention relates to a processing method of cassava whole powder, which is used for preparing glue and comprises the following steps:
(1) removing impurities, namely cleaning the surface of fresh cassava to remove impurities;
(2) slicing or shredding, and drying in the sun or oven to control the water content of cassava within 15%;
(3) pulverizing, pulverizing dried cassava or dried cassava slices with a pulverizer, and sieving or not sieving to obtain cassava powder.
Specifically, the drying in the step (2) of the invention includes modes of high temperature, normal temperature or freeze drying; in the step (3), the cassava powder comprises cassava starch and cassava residues (fibers), wherein the cassava starch is crushed by 80-200 meshes, and the fibers are crushed by 80-200 meshes. When the mesh number is less than 80 meshes, the granularity of the cassava starch and the cassava fiber is too high, and the cassava starch and the cassava fiber need to be crushed and sieved again to ensure that the granularity of the cassava powder is controlled between 80 and 200 meshes.
Preferably, the separation treatment is further included after the step (2), the cassava whole powder passes through a screening and separating device, and the cassava powder and the cassava residues are obtained through separation. Before the cassava flour glue is prepared, the cassava residues can be partially separated according to the required performance of the glue, the content of fibers is reduced, the cassava residues can not be separated, and even the cassava residues can be additionally added into the cassava flour, so that the consumption of the cassava residues is increased, the material cost is further reduced, and the content of the fibers is increased.
The traditional method cannot think of preparing glue by using cassava whole powder because of the following reasons:
(1) the glue industry has fixed standards for starch, and the physical and chemical indexes of the cassava flour far cannot reach the physical and chemical indexes of pure starch.
In the prior art, pure starch is usually adopted to prepare corrugated board glue, and the quality of the glue is directly related to the quality and the dosage of the starch, so the starch physical and chemical index requirements in the industry are as follows: 0.1 to 0.3 percent of ash content, more than 85 percent of starch content, more than 95 percent of whiteness, less than or equal to 0.5 percent of protein, and the viscosity of 700-800 BU. Conventionally, when ash content exceeds 0.3%, precipitates for preparing the glue are increased, and the stability of the glue is poor; if the starch content is lower than 85%, the viscosity of the glue is affected, the difficulty of adjusting the water ratio in production processing is increased, and the mass production is not facilitated; if the whiteness is lower than 95%, the starch is considered to be deteriorated or overdue, and the starch product is a defective product; when the protein content exceeds 0.5 percent, the prepared glue is easy to foam, and defoaming agents such as tributyl phosphate, silicone oil and the like are added in order to not influence the gluing effect; if the viscosity is lower than 700BU, the starch is considered to be impure and the impurities are more, which affects the adhesive strength of the glue. The quality indexes of the cassava powder are that ash content is 0.5-1.8%, starch content is 55-78%, whiteness is 65-88%, protein is more than 0.8%, and viscosity is 500-900 BU. The use of cassava whole flour, all of which fail in physical specifications, for the preparation of glues is not conceivable by the person skilled in the art.
(2) In the traditional glue preparation process, the purer the starch, the better the viscosity of the glue prepared, the impure the starch content, which means that other impurities are added into the starch, which easily causes the problems of glue instability or glue viscosity reduction, and the like.
(3) The method is characterized in that the pure starch is prepared by soaking fresh cassava or dry cassava slices in water, grinding the fresh cassava or dry cassava slices into powder, precipitating and drying, wherein the soaking time and the soaking water temperature of the fresh cassava in the precipitating process are different, and the drying time and the drying temperature in the drying process are difficult to control, so that the viscosity and the gelatinization temperature of the prepared cassava starch are different when the prepared cassava starch is used for preparing glue, the performance of the prepared glue is unstable.
The invention has the beneficial effects that:
(1) the invention breaks through the technical prejudice of the industry, uses the cassava powder to replace the pure starch, and although the physical and chemical indexes of the cassava powder are lower than those of the pure starch, because the cassava powder contains the fiber, the addition of the fiber does not influence the fluidity of the prepared glue and can also improve the bonding strength of the prepared glue. The sand and steel bars are added into the pure cement, and the sand and the steel bars are filled between the cement, so that the bonding strength among cement molecules is favorably improved, and the bonding strength and other physical indexes of the prepared cement paste are improved.
The physical and chemical indexes of the cassava flour and the cassava starch in the industry are compared as follows:
the glue viscosity in conventional processing, also known as flow rate, is measured in seconds as the flow out to the post position with a fixed mass of glue. That is, the viscosity of the traditional glue is only a fluidity index, not a bonding strength index, but the cassava powder of the invention contains fibers, which is beneficial to improving the bonding strength of the glue for preparing the glue, and when the glue is applied to the production of corrugated boards, the bonding strength of the bonding surface layer of the corrugated boards can be improved, and the phenomenon of false adhesion or glue failure is avoided.
The physical index data of the paper product prepared by applying the glue prepared by the invention to the production and processing of the paperboard are as follows:
the adhesive strength, the fixed load capacity and the side pressure strength of the paper product prepared by the glue applied to the production and processing of the corrugated board are improved by more than 20 percent compared with the adhesive strength, the fixed load capacity and the side pressure strength of the common pure starch glue, the adhesive strength is higher, and the quality of the prepared product is better.
(2) The cassava powder contains fibers, and when the prepared glue is applied to production and processing of the corrugated board, the compression resistance of the corrugated board is improved, the speed of the vehicle is improved, and the processing quality of the corrugated board is stable. If other materials (such as calcium powder, kaolin and the like) are added into the cassava starch, the stability of the glue is really reduced due to the addition of impurities, and the cassava fiber is a substance separated from the cassava and naturally fused with the cassava starch, so that the stability of the glue is not reduced, and the compression resistance of the corrugated board can be improved by utilizing the characteristics of the natural cassava fiber.
(3) The cassava powder contains the fibers, and the fibers do not need to absorb heat and water because the fibers do not need to expand and cure when the glue is prepared, so that the water absorbed by the fibers can be absorbed by starch during curing and expansion, the starch is ensured to be fully expanded, the curing degree of the cassava powder glue is improved, and the bonding strength of the glue is improved; in addition, because the cassava flour contains fibers, the using amount of starch in the cassava flour can be reduced compared with that of starch in the traditional pure starch glue, and when the cassava flour glue is prepared, the using amount of water can also be reduced, so that the heat absorption amount of the cassava flour in the curing process is reduced, the heat absorbed by water supply is reduced, the glue curing speed is high, the steam using amount is favorably reduced, and the energy-saving effect is obvious. Compared with glue prepared by traditional cassava starch, 1-2 atmospheric pressures can be saved.
(4) The cassava powder provided by the invention is simple in processing technology, free of waste slag and waste water discharge, more environment-friendly and beneficial to popularization and application. Traditional starch processing factories generally take processed starch residues as waste materials for secondary sale. The invention replaces pure starch with cassava flour, does not need to remove cassava residues (the main component is fiber) in the cassava flour, changes waste into valuable, and greatly reduces the consumption of raw materials for preparing the glue, thereby being beneficial to reducing the processing cost of a corrugated board production line. Compared with glue prepared from the traditional cassava starch, the processing cost (steam cost and raw material cost) can be reduced by 20-30%.
(5) According to the invention, a small amount of flow aid or suspending agent can be added into the cassava powder, which is beneficial to further improving the fluidity of the glue, so that the glue prepared from the cassava powder is suitable for all paperboard production machine types, and the application range is wide. In addition, the vegetable additive, the polyvinyl alcohol and the cellulose can also wrap and seal protein and powdered sugar contained in the cassava whole powder, the vegetable additive, the polyvinyl alcohol and the cellulose have a flow aiding effect, the flowability of the glue can be improved, the vegetable additive, the polyvinyl alcohol and the cellulose also have a suspension effect of wrapping and sealing the protein and the powdered sugar, the glue cannot bubble and is not easy to deteriorate in the preparation process, the quality and the storage life of the cassava whole powder glue can be improved, and the stability of the glue is good. The protein content in the cassava powder exceeds the standard value in the industry, and a defoaming agent is not needed to be added, so that the gluing effect is not influenced.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
In the application of the cassava whole powder in this embodiment, the cassava whole powder is used for preparing glue. The cassava powder has the quality indexes of 0.8% of ash, 56% of starch content, 71% of whiteness and 620BU of viscosity. The content of the cassava fibers in the cassava powder is 5 percent of the weight of the cassava powder. The glue prepared from the cassava powder is applied to the corrugated board adhesive glue, and the corrugated board adhesive glue mainly comprises the cassava powder, caustic soda, borax and water.
The processing method of the cassava whole powder for preparing the glue comprises the following steps:
(3) removing impurities, namely cleaning the surface of fresh cassava to remove impurities;
(4) slicing or shredding, and drying in the sun or oven to control the water content of cassava within 12%;
(3) crushing, namely crushing the dry cassava or the dry cassava slices into 100 meshes by using a crusher to prepare the cassava powder.
Example 2
In the application of the cassava whole powder in this embodiment, the cassava whole powder is used for preparing glue. The cassava powder has the quality indexes of 1% of ash content, 60% of starch content, 72% of whiteness and 650BU of viscosity. The content of the cassava fibers in the cassava powder is 15% of the weight of the cassava powder.
The glue prepared from the cassava flour is applied to the plywood glue, namely, the cassava flour is used for preparing the plywood glue, the main component of the plywood glue is the cassava flour, the addition amount of the cassava flour is 35-90% of the total weight of the solid content of the formula, and the other raw materials of the plywood glue formula are conventional components.
The processing method of the cassava whole powder for preparing the glue comprises the following steps:
(5) removing impurities, namely cleaning the surface of fresh cassava to remove impurities;
(6) slicing or shredding, and drying in the sun or oven to control the water content of cassava within 10%;
(3) crushing, namely crushing the dry cassava or the dry cassava slices into 150 meshes by using a crusher to prepare the cassava powder.
Example 3
In the application of the cassava whole powder in this embodiment, the cassava whole powder is used for preparing glue. The cassava powder has the quality indexes of 1.1% of ash, 70% of starch content, 75% of whiteness and 680BU of viscosity. The content of the cassava fibers in the cassava powder is 20% of the weight of the cassava powder.
The glue prepared from the cassava flour is applied to surface sizing of papermaking paperhanging, namely the cassava flour is applied to surface sizing of papermaking paperhanging, the main component of the surface sizing of the papermaking paperhanging is the cassava flour, the addition amount of the cassava flour is 35% -90% of the total weight of the solid content of the formula, and the other raw materials of the surface sizing formula of the papermaking paperhanging are conventional materials.
The processing method of the cassava whole powder for preparing the glue comprises the following steps:
(7) removing impurities, namely cleaning the surface of fresh cassava to remove impurities;
(8) slicing or shredding, and drying in the sun or oven to control the water content of cassava within 8%;
(3) crushing, namely crushing the dry cassava or the dry cassava slices into 180 meshes by using a crusher to prepare the cassava powder.
Example 4
The present embodiment is different from embodiment 1 in that: the cassava powder has the quality indexes of 1.2% of ash, 65% of starch content, 75% of whiteness and 700BU of viscosity. The cassava powder of the embodiment is further added with a flow aid, and the addition amount of the flow aid is 1% of the weight of the cassava powder. The glidant is a plant glidant, and the plant glidant is pregelatinized starch.
The glue prepared from the cassava flour is applied to paper pasting glue, namely the cassava flour is used for preparing the paper pasting glue, the main component of the paper pasting glue is the cassava flour, the addition amount of the cassava flour is 35% -90% of the total weight of the solid content of the formula, and the other raw materials of the paper pasting glue formula are conventional materials.
The rest of this embodiment is the same as embodiment 1, and is not described herein again.
Example 5
The present embodiment is different from embodiment 2 in that: the cassava powder has the quality indexes of 1.5% of ash, 70% of starch content, 80% of whiteness and 850BU of viscosity. The cassava powder of the embodiment is further added with a flow aid, and the addition amount of the flow aid is 2% of the weight of the cassava powder. The flow aid is a plant flow aid or polyvinyl alcohol.
The glue prepared from the cassava flour is applied to paper tube glue, namely the cassava flour is used for preparing the paper tube glue, the main component of the paper tube glue is the cassava flour, the addition amount of the cassava flour is 35% -90% of the total weight of the formula, and the other raw materials of the formula of the paper tube glue are conventional materials.
The rest of this embodiment is the same as embodiment 2, and is not described again here.
Example 6
The present embodiment is different from embodiment 3 in that: the cassava powder has the quality indexes of 1.8% of ash, 75% of starch content, 85% of whiteness and 900BU of viscosity. The cassava powder of the embodiment is further added with a flow aid, and the addition amount of the flow aid is 2.5% of the weight of the cassava powder. The glidant is a mixture of pregelatinized starch and cellulose mixed in an arbitrary ratio of 2: 1.
The rest of this embodiment is the same as embodiment 3, and is not described herein again.
Example 7
This example differs from examples 1-3 in that: the weight percentage of the cassava powder is 50%, the weight percentage of the corn starch is 50%, and the cassava powder and the corn starch are mixed to prepare glue.
The rest of this example is the same as examples 1 to 3, and is not described again here.
Example 8
This example differs from examples 4-6 in that: the weight percentage of the cassava powder is 40%, the weight percentage of the cassava starch is 60%, and the cassava powder and the cassava starch are mixed to prepare the glue.
The rest of this embodiment is the same as embodiments 4 to 6, and will not be described again.
Example 9
This example differs from examples 1-6 in that: the weight percentage of the cassava powder is 30%, the weight percentage of the wheat starch is 70%, and the cassava powder and the wheat starch are mixed for preparing glue.
The rest of this example is the same as examples 1 to 6, and is not described again here.
In the examples 1 to 6 of the invention, the cassava powder is used for preparing the glue instead of the traditional cassava starch, the prepared cassava powder glue has high bonding strength, and in the examples 7 to 9, the glue is prepared by mixing the cassava powder and the pure starch, and the prepared glue has high bonding strength. When the cassava starch is used for producing the paperboard, the phenomenon of false adhesion or glue failure can be avoided, and the fibers in the cassava flour can effectively improve the compression resistance of the corrugated paperboard, so that the speed of the vehicle can be improved, and the paperboard processing quality is stable. The processing method of the cassava flour is simple in process and high in production efficiency, cassava dregs (the main component is fiber) in the cassava flour do not need to be removed, waste materials are changed into valuable materials, no waste residues and no waste water are discharged, the processing method is more environment-friendly, the consumption of raw materials for preparing the glue is greatly reduced, and therefore the processing cost of a corrugated board production line is favorably reduced.
Comparative example
The performance test of the cassava flour glue prepared from the cassava flour and the corn starch glue prepared from the traditional corn starch is respectively carried out, and the comparison conditions are as follows:
testing a sample: H424H paper with five-layer structure, the paperboard specification is 2cm x 10cm, the gram weight of the surface layer is 160g/m2And a pit layer of 140g/m2) The gram weight of the middle layer is 110g/m2The grammage of the pit layer is 140g/m2The gram weight of the bottom layer is 160g/m2；
Cardboard bonding, limit compaction test equipment: YQ-ZB-1 electric cardboard bursting strength tester, YQ-ZB-3000 cardboard compression tester
Wherein P denotes the average pressure, Z denotes the adhesive strength, and B denotes the edge pressure strength.
From the data, the bonding strength of the cassava flour paperboard is 2.49 times of that of the traditional corn starch glue, the edge pressure strength of the cassava flour paperboard is 1.25 times of that of the traditional corn starch glue, and the glue prepared from the cassava flour is high in bonding strength and excellent in edge pressure performance.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (7)
1. The application of the cassava powder is characterized in that: applying cassava powder to the preparation of the corrugated board glue, wherein the cassava powder contains or is added with cassava fibers, and the content of the cassava fibers is more than 2% of the weight of the cassava powder;
the cassava powder has the quality indexes of 0.5-1.8% of ash, 55-78% of starch, 65-88% of whiteness and 500-900BU of viscosity.
2. Use of a cassava flour according to claim 1, characterized in that: the glue prepared from the cassava flour is applied to paperboard adhesive glue, plywood glue, papermaking surface mounting glue, paper mounting glue or paper tube glue.
3. Use of a cassava flour according to claim 1, characterized in that: adding pure starch into the cassava powder for preparing glue, wherein the weight percentage of the cassava powder and the pure starch is as follows:
30 to 70 percent of cassava powder
30 to 70 percent of pure starch
The pure starch is at least one of tapioca starch, corn starch and wheat starch.
4. Use of a cassava flour according to claim 2, characterized in that: the main component of the paperboard adhesive is cassava flour, and the paperboard adhesive also comprises caustic soda, borax and water.
5. Use of a cassava flour according to claim 1, characterized in that: the cassava fiber is added into the cassava powder, and the adding amount of the cassava fiber is 2-20% of the weight of the cassava powder.
6. Use of a cassava whole flour according to any one of claims 1 to 3, in which: the cassava powder is also added with an additive, and the addition amount of the additive is 0.5-3% of the weight of the cassava powder.
7. A processing method of cassava flour is characterized in that: the processing method of cassava whole flour for the application of cassava whole flour according to claim 1, comprising the steps of:
(1) removing impurities, namely cleaning the surface of fresh cassava to remove impurities;
(2) slicing or shredding, and drying in the sun or oven to control the water content of cassava within 15%;
(3) pulverizing, pulverizing dried cassava or dried cassava slices with a pulverizer, and sieving or not sieving to obtain cassava powder.
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| CN111138999A (en) * | 2020-01-16 | 2020-05-12 | 东莞市田园淀粉有限公司 | Mixed powder and application and production process thereof in corrugated board glue making |
| CN113122163B (en) * | 2021-03-15 | 2022-12-16 | 上海应用技术大学 | Preparation method of corrugated board starch adhesive with low gelatinization temperature |
| CN115584221A (en) * | 2022-09-23 | 2023-01-10 | 罗来康 | Novel environment-friendly adhesive and preparation process thereof |
| CN116804317A (en) * | 2023-08-17 | 2023-09-26 | 邹志勇 | Surface sizing agent for tapioca dry sheet raw starch papermaking and preparation method thereof |
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| WO2006131350A1 (en) * | 2005-06-08 | 2006-12-14 | Cargill Incorporated | Adhesive composition |
| CN101396102B (en) * | 2008-10-16 | 2012-07-04 | 中国农业科学院作物科学研究所 | Cassava whole-powder |
| CN101628944B (en) * | 2009-07-15 | 2011-05-18 | 聚祥(厦门)淀粉有限公司 | Complex modified starch |
| BR102013026713A2 (en) * | 2013-10-16 | 2015-08-18 | Nicepel Produtos Químicos Ltda Epp | Formulation and process for obtaining cassava dextrin-based compound for use in the paper industry and paper converting |
| CN108850927A (en) * | 2018-05-11 | 2018-11-23 | 周文 | A kind of cassava whole-powder |
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