CN116988337B - Degradable corrugated board and preparation process thereof - Google Patents

Degradable corrugated board and preparation process thereof Download PDF

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Publication number
CN116988337B
CN116988337B CN202311003589.6A CN202311003589A CN116988337B CN 116988337 B CN116988337 B CN 116988337B CN 202311003589 A CN202311003589 A CN 202311003589A CN 116988337 B CN116988337 B CN 116988337B
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corrugated
layer
paper layer
thickness
corrugated board
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CN116988337A (en
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解越
唐玉中
施蜜
陈亦芬
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Boyi New Material Co ltd
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Boyi New Material Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/08—Corrugated paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to another layer of paper or cardboard layer
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
    • D21H17/24—Polysaccharides
    • D21H17/28—Starch
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/20—Macromolecular organic compounds
    • D21H17/33—Synthetic macromolecular compounds
    • D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/63—Inorganic compounds
    • D21H17/67—Water-insoluble compounds, e.g. fillers, pigments
    • D21H17/68—Water-insoluble compounds, e.g. fillers, pigments siliceous, e.g. clays
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/36—Biocidal agents, e.g. fungicidal, bactericidal, insecticidal agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/50—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by form
    • D21H21/52—Additives of definite length or shape
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/30—Multi-ply
    • D21H27/40—Multi-ply at least one of the sheets being non-planar, e.g. crêped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2250/00—Layers arrangement
    • B32B2250/26—All layers being made of paper or paperboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/716—Degradable
    • 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)
  • Dispersion Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Pest Control & Pesticides (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention relates to the technical field of packaging materials, in particular to a degradable corrugated board and a preparation process thereof. The technical key points are as follows: the corrugated board comprises a face paper layer, a corrugated layer and an inner paper layer, wherein the corrugated layer contains mycelium materials; the mass fraction of the mycelium material in the raw material of the corrugated layer is determined by the preset specification of the corrugated paperboard. According to the invention, the degradable mycelium material is added into the corrugated paper, so that the tensile strength of the corrugated paper board is improved, and the high-temperature resistance, acid and alkali corrosion resistance of the corrugated paper board are improved; meanwhile, in the preparation process, factors such as gram weight of the mycelium material and thickness of the corrugated layer are comprehensively considered, and the optimal mycelium material blending amount is selected, so that the gram weight of the corrugated board is reduced while the mechanical property of the corrugated board is ensured.

Description

Degradable corrugated board and preparation process thereof
Technical Field
The invention relates to the technical field of packaging materials, in particular to a degradable corrugated board and a preparation process thereof.
Background
The corrugated board has the advantages of excellent buffering protection performance, good printing display performance and green environment protection, becomes a main paper product transportation packaging container at present, and is widely applied to transportation of various commodities.
In the prior art, in order to improve the strength of corrugated board, a fiber material is generally added to a corrugated paper layer. However, the fiber material is difficult to degrade, and in the process of preparing the base paper, the dispersibility of the fiber material is poor, so that agglomeration is easy to cause, and the mechanical property of the corrugated board is affected.
Disclosure of Invention
The first object of the invention is to develop a degradable corrugated board, wherein a degradable mycelium material is added into the corrugated board, so that the tensile strength of the corrugated board is improved, and meanwhile, the high-temperature resistance, acid and alkali corrosion resistance of the corrugated board is improved.
The second purpose of the invention is to develop a preparation process of the degradable corrugated board, comprehensively consider factors such as gram weight of mycelium material and thickness of corrugated layer, select the optimal mycelium material blending amount, and reduce gram weight of the corrugated board while guaranteeing mechanical property of the corrugated board.
The technical aim of the invention is realized by the following technical scheme:
the invention provides a degradable corrugated board, which comprises a face paper layer, a corrugated layer and an inner paper layer, wherein the corrugated layer of the corrugated board contains mycelium materials; the mass fraction of the mycelium material in the corrugated layer is determined by the preset specification of the corrugated paperboard.
Further, the mycelium material is obtained by drying and crushing a culture medium full of mycelium.
Further, the preparation method of the mycelium material adopted in the invention comprises the steps of inoculating edible fungi on a culture medium, culturing in the dark until the culture medium is full of mycelium, drying the culture medium full of mycelium, and crushing to obtain the mycelium material.
Further, the components and proportions of the above-mentioned culture medium and the pulp in the raw material of the corrugated layer are the same.
Further, the paper pulp comprises the following components in parts by weight: 60-100 parts of slurry, 8-12 parts of corn modified starch, 5-7 parts of nano fumed silica, 6-10 parts of organic bentonite, 1-4 parts of acrylic ester, 2-4 parts of xanthan gum, 1-3 parts of dispersing agent and 1-4 parts of mildew preventive.
Further, the slurry has the same components as the culture medium in the mycelium material, and comprises the following components in parts by mass: 70-90 parts of straw, 8-28 parts of wheat bran, 0.5-1.5 parts of lime and 0.5-1.5 parts of gypsum.
Further, the edible fungus is any one of Lentinus Edodes, straw Mushroom, auricularia or Tremella.
Further, the preset specification of the corrugated board comprises the following parameters: the thickness of the face paper layer of the corrugated board, the thickness of the corrugated layer, the thickness of the inner paper layer, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the face paper layer; the thickness of the corrugated layer is the vertical height of the ridges of the corrugated layer, and specifically, the vertical distance from the vertex of the bending part of the corrugated layer to the inner paper layer or the surface paper layer.
The invention also provides a preparation process of the degradable corrugated board, which is realized by the following technical scheme.
The preparation process of the degradable corrugated board provided by the invention comprises the following operation steps:
s1, determining the thickness of a face paper layer, the thickness of a corrugated layer and the thickness of an inner paper layer of a corrugated board to be manufactured according to actual needs;
s2, determining the total gram weight of the corrugated board to be manufactured, the gram weight of the inner paper layer and the gram weight of the surface paper layer according to actual needs;
s3, determining the mass fraction of the mycelium material in the raw material of the corrugated layer according to the thickness of the surface paper layer, the thickness of the corrugated layer, the thickness of the inner paper layer, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer;
s4, preparing a corrugated layer;
and S5, bonding the inner paper layer, the corrugated layer and the surface paper layer by using glue, and drying to obtain the corrugated board.
Further, the corrugated layer is wavy and is divided into a bending part and a straight line part, and in the bonding process of the step S5, the bending part is respectively connected with the inner surfaces of the inner paper layer and the surface paper layer;
the included angle between the straight line part and the inner paper layer or the surface paper layer is determined by the thickness of the corrugated layer of the corrugated board and the mass fraction of the mycelium material in the corrugated layer.
Further, when the angle between the straight line portion and the inner paper layer or the face paper layer is selected to be large or small, when (h 1 +h 3 )/h 2 When p is more than 0.5 and less than or equal to 0.4, the included angle between the linear part and the inner paper layer or the surface paper layer is 60 degrees;
when (h 1 +h 3 )/h 2 Less than or equal to 0.5 and p less than or equal to 0.4 or (h) 1 +h 3 )/h 2 When the angle between the straight line part and the inner paper layer or the surface paper layer is more than 0.5 and p is more than 0.4, the included angle between the straight line part and the inner paper layer or the surface paper layer is 45 degrees;
when (h 1 +h 3 )/h 2 When p is less than or equal to 0.5 and more than 0.4, the included angle between the straight line part and the inner paper layer or the surface paper layer is 30 degrees;
wherein p is the mass fraction of mycelium material in the raw material of the corrugated layer, and the unit is 1;
h 1 、h 2 and h 3 The thickness of the face paper layer, the thickness of the corrugated layer and the thickness of the inner paper layer of the corrugated board are respectively in mm.
Further, the specific operation in the step S3 is that the thickness of the surface paper layer, the thickness of the corrugated layer and the thickness of the inner paper layer of the corrugated board, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer are substituted into a formula, and the mass fraction of the mycelium material in the raw material of the corrugated layer is calculated;
the formula is:
wherein p is the mass fraction of mycelium material in the raw material of the corrugated layer, and the unit is 1;
h 1 、h 2 and h 3 The thickness of the face paper layer, the thickness of the corrugated layer and the thickness of the inner paper layer of the corrugated board are respectively in mm;
W total (S) 、W Outer part And W is Inner lining The unit is m, which is the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer respectively 2 /g。
Further, the specific operation in step S4 is as follows:
s401, adding mycelium materials into paper pulp according to the mass fraction determined in the step S3, uniformly stirring, carrying out papermaking by a conveying pump, forming paper sheets by net feeding, and then squeezing, dehydrating and drying to obtain corrugated base paper;
s402, performing edge pressing on the corrugated base paper by an edge pressing machine to obtain the corrugated base paper with the edge pressed;
s403, bonding 2-4 corrugated base papers with corrugated edges by adopting an adhesive to form a corrugated layer.
In summary, the invention has the following beneficial effects:
according to the invention, the degradable mycelium material is added into the corrugated paper, so that the tensile strength of the corrugated paper board is improved, and the high-temperature resistance, acid and alkali corrosion resistance of the corrugated paper board are improved.
Meanwhile, in the preparation process, factors such as gram weight of the mycelium material and thickness of the corrugated layer are comprehensively considered, and the optimal mycelium material blending amount is selected, so that the gram weight of the corrugated board is reduced while the mechanical property of the corrugated board is ensured.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the invention provides a degradable corrugated board and a preparation process thereof, and the specific implementation, the characteristics and the effects are described in detail below.
The sources of the raw materials in this embodiment are as follows:
and (3) lining paper layer: jiangsu's paper making Co., ltd (kraft);
and (3) a surface paper layer: jiangsu's paper making Co., ltd (kraft);
glue: jiangsu Minggu international trade company (white latex);
and (3) an adhesive: jiangsu Minggu International trade Co., ltd (corn modified starch);
acrylic ester: shandong chemical Co., ltd.
Example 1: degradable corrugated board
The degradable corrugated board provided by the embodiment comprises a face paper layer, a corrugated layer and a lining paper layer, wherein the corrugated layer contains mycelium materials; the mass fraction of the mycelium material in the raw material of the corrugated layer is determined by the preset specification of the corrugated paperboard.
The preset specification of the corrugated board comprises the thickness of the surface paper layer of the corrugated board, the thickness of the corrugated layer, the thickness of the inner paper layer, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer; the thickness of the corrugated layer is the vertical height of the ridge of the corrugated layer.
Example 2: degradable corrugated board
As a preferred embodiment of example 1, in this example, the mycelium material is obtained by drying and crushing a medium full of mycelium. After being mixed with paper pulp, the mycelium material obtained by the preparation method is stranded with fibers in the paper pulp to form a more stable special structure, and the mechanical property of the corrugated layer is greatly improved. Meanwhile, the mycelium material also has the functions of high temperature resistance and sound insulation. In addition, the mycelium material has larger elastic modulus, improves the toughness of the corrugated layer and even the whole corrugated board to a certain extent, and does not enlarge the tearing area even after being damaged.
The specific preparation method of the mycelium material comprises the following steps:
inoculating edible fungus with 5% of the mass of the culture medium into the culture medium, culturing in darkness at 25deg.C for 10 days to obtain culture medium full of mycelia, oven drying the culture medium full of mycelia at 65deg.C for 24 hr, and pulverizing to 150 mesh.
Wherein, the formula of the culture medium is preferably 70-90 parts of straw, 8-28 parts of wheat bran, 0.5-1.5 parts of lime and 0.5-1.5 parts of gypsum according to parts by weight; the advantage of selecting the above-mentioned material as the culture medium is that the above-mentioned material of the culture medium can also be used as a component of the pulp in this embodiment, and the dispersibility of the mycelium material can be ensured in the subsequent mixing of the pulp with the mycelium material.
In this embodiment, the edible fungus may be any one of Lentinus Edodes, straw Mushroom, auricularia or Tremella. The mycelium of the edible fungi grows faster, has higher mycelium toughness and is more beneficial to improving the cracking resistance of the corrugated layer.
Example 3: degradable corrugated board and preparation process thereof
The present embodiment provides a process for preparing the degradable corrugated board of embodiment 2, which specifically comprises the following steps:
s1, determining the thickness of a face paper layer, the thickness of a corrugated layer and the thickness of an inner paper layer of a corrugated board to be manufactured;
s2, determining the total gram weight of the corrugated board to be manufactured, the gram weight of the inner paper layer and the gram weight of the surface paper layer;
s3, determining the mass fraction of the mycelium material in the raw material of the corrugated layer according to the thickness of the surface paper layer, the thickness of the corrugated layer, the thickness of the inner paper layer, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer;
s4, preparing a corrugated layer;
s5, bonding the inner paper layer, the corrugated layer and the surface paper layer by using glue, and drying at 120 ℃ for 6 hours to obtain the corrugated board.
Wherein, according to the actual demand, the thickness of the surface paper layer is 4mm, and the gram weight is 70m 2 /g; the thickness of the corrugated layer is 13mm; the thickness of the lining paper layer is 3mm, and the gram weight is 60m 2 /g; the total gram weight of the corrugated board is 280m 2 /g。
Because the weight of the mycelium material is large, if the blending amount is too large, the weight of the corrugated layer is too large, which is not beneficial to the weight reduction of the corrugated board; on the other hand, if the weight of the corrugated layer is too large, the weight ratio of the corrugated layer to the surface paper layer and the inner paper layer is too large, and when the corrugated layer is damaged, the action of the damage force on the inner paper layer and the surface paper layer can be aggravated, so that the inner paper layer and the surface paper layer are more easily broken.
Therefore, in the present embodiment, the thickness ratio among the liner paper layer, the corrugated layer and the face paper layer, and the total grammage of the corrugated board are comprehensively considered, and the formula is utilizedIn this embodiment, the mass fraction of the mycelium material in the raw material of the corrugated layer is calculated, so that the mycelium material is ensured to play a role in the corrugated layer, and the mycelium material is prevented from being added, thereby negatively affecting the overall mechanical effect of the corrugated board.
Wherein p is the mass fraction of mycelium material in the corrugated layer, and the unit is 1;
h 1 、h 2 and h 3 The thickness of the face paper layer, the thickness of the corrugated layer and the thickness of the inner paper layer of the corrugated board are respectively in mm;
W total (S) 、W Outer part And W is Inner lining The unit is m, which is the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer respectively 2 /g
It is found that, in the present embodiment, the mass fraction of the mycelium material in the raw material of the corrugated layer is 32%, that is, p=0.32.
According to the calculation result, the method for preparing the corrugated layer in this embodiment is as follows:
firstly, preparing paper pulp, and uniformly stirring 100 parts of pulp, 12 parts of corn modified starch, 7 parts of nano fumed silica, 10 parts of organic bentonite, 4 parts of acrylic ester, 4 parts of xanthan gum, 3 parts of dispersing agent and 1 part of mildew preventive according to parts by weight;
wherein, according to parts by weight, the slurry comprises 80 parts of straw, 18 parts of wheat bran, 1.2 parts of lime and 0.8 part of gypsum, then the same material as the slurry is adopted as a culture medium, oyster mushroom is adopted as a strain of edible fungi, and mycelium material is prepared according to the method of example 2.
According to the calculated mass fraction of the mycelium material in the raw material of the corrugated layer, uniformly mixing paper pulp and the mycelium material, carrying out papermaking in a paper machine through a conveying pump, forming paper sheets on the paper sheets, and then squeezing, dehydrating and drying to obtain corrugated base paper; the corrugated base paper is subjected to edge pressing through an edge pressing machine to obtain the corrugated base paper with the edge pressed; and bonding 4 corrugated base papers with the corrugated edges by adopting an adhesive to form a corrugated layer.
Since p=0.32 in this embodiment, (h) 1 +h 3 )/h 2 =0.53, then (h 1 +h 3 )/h 2 When p is more than 0.5 and less than or equal to 0.4, the included angle between the straight line part of the corrugated layer and the inner paper layer or the surface paper layer is 60 degrees; if a smaller angle is selected at this time, a stronger compression resistance cannot be provided due to a smaller blending amount of the mycelium material; if a larger angle is selected, the corrugated layer material usage will be greatly increased to maintain a larger angle due to the larger thickness of the corrugated layer, and the blending amount of other components will be compressed due to the limitation of the total gram weight of the corrugated board, thereby affecting the mechanical strength of the corrugated board.
Therefore, in step S5 of this embodiment, the included angle between the straight line portion of the corrugated layer and the inner paper layer or the face paper layer is controlled to be 60 ° during the bonding process.
Example 4: degradable corrugated board and preparation process thereof
This example provides another process for making the degradable corrugated board of example 2
In this example, the thickness of the facestock layer was 5mm and the grammage was 80m, unlike example 3 2 /g; the thickness of the corrugated layer is 15mm; the thickness of the lining paper layer is 5mm, and the gram weight is 70m 2 /g; the total gram weight of the corrugated board is 320m 2 /g。
Thus, the formula is utilizedIt is calculated that in this example, the mass fraction of the mycelium material in the raw material of the corrugated layer was 46%.
Wherein p is the mass fraction of mycelium material in the raw material of the corrugated layer, and the unit is 1;
h 1 、h 2 and h 3 The thickness of the face paper layer, the thickness of the corrugated layer and the thickness of the inner paper layer of the corrugated board are respectively in mm;
W total (S) 、W Outer part And W is Inner lining Respectively corrugated boardThe unit of the total grammage of the inner paper layer and the grammage of the surface paper layer is m 2 /g
Then since in this embodiment p=0.46, (h) 1 +h 3 )/h 2 =0.66, then (h 1 +h 3 )/h 2 When the angle between the straight line part and the inner paper layer or the surface paper layer is more than 0.5 and p is more than 0.4, the included angle between the straight line part and the inner paper layer or the surface paper layer is 45 degrees.
Therefore, in step S5 of this embodiment, the included angle between the straight line portion of the corrugated layer and the inner paper layer or the face paper layer is controlled to 45 ° during the bonding process.
The remaining material composition formulation, preparation steps and parameters were the same as in example 3.
Comparative example 1
All raw material component formulas and production process parameter steps of the corrugated board of the comparative example are the same as those of the embodiment 3; the difference is that in the comparative example, the mass fraction of the mycelium material in the raw material of the corrugated layer is directly 50% without adopting a formula; and in the bonding process in the step S5, the included angle between the straight line part of the corrugated layer and the inner paper layer or the surface paper layer is directly controlled at 60 degrees.
Comparative example 2
All raw material component formulas and production process parameter steps of the corrugated board of the comparative example are the same as those of the embodiment 3; the difference is that in the comparative example, the mass fraction of the mycelium material in the raw material of the corrugated layer is directly 20% without adopting a formula; and in the bonding process in the step S5, the included angle between the straight line part of the corrugated layer and the inner paper layer or the surface paper layer is directly controlled at 60 degrees.
Comparative example 3
All raw material component formulas and production process parameter steps of the corrugated board of the comparative example are the same as those of the embodiment 3; the difference is that in this comparative example, the angle between the straight line portion of the corrugated layer and the inner paper layer or the face paper layer is directly controlled to 45 ° during the bonding process in step S5.
Comparative example 4
All raw material component formulas and production process parameter steps of the corrugated board of the comparative example are the same as those of the embodiment 3; the difference is that the included angle between the straight line part of the corrugated layer and the inner paper layer or the surface paper layer is directly controlled at 70 degrees in the bonding process in the step S5.
Performance testing
The corrugated cardboards obtained in examples 3 to 4 and comparative examples 1 to 4 were tested for their properties and the results are shown in table 1.
TABLE 1 Performance test results
According to the comparison of the data, the blending amount of the mycelium material is accurately limited after the formula provided by the invention is adopted for calculation, so that the mechanical strength, the moisture resistance and the air tightness of the corrugated board are improved.
Meanwhile, the included angle between the corrugated layer and the inner paper layer or the face paper layer is accurately selected by the other formula provided by the invention, so that the compressive strength of the corrugated board is greatly improved.
The present invention is not limited to the above-mentioned embodiments, but is not limited to the above-mentioned embodiments, and any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical matters of the present invention can be made by those skilled in the art without departing from the scope of the present invention.

Claims (3)

1. A degradable corrugated board, which is characterized by comprising a face paper layer, a corrugated layer and an inner paper layer; the corrugated layer of the corrugated board contains mycelium materials; the mass fraction of the mycelium material in the raw materials of the corrugated layer is determined by the preset specification of the corrugated paperboard; the mycelium material is obtained by drying and crushing a culture medium full of mycelium; inoculating edible fungi to a culture medium, culturing in the dark until mycelia grow on the culture medium, drying the culture medium full of mycelia, and crushing to obtain the mycelium material; the components and the proportions of the culture medium and the pulp in the raw materials of the corrugated layer are the same; the paper pulp comprises the following components in parts by weight: 60-100 parts of sizing agent, 8-12 parts of corn modified starch, 5-7 parts of nano fumed silica, 6-10 parts of organic bentonite, 1-4 parts of acrylic ester, 2-4 parts of xanthan gum, 1-3 parts of dispersing agent and 1-4 parts of mildew preventive;
the slurry and the culture medium in the mycelium material have the same components, and comprises the following components in parts by mass: 70-90 parts of straw, 8-28 parts of wheat bran, 0.5-1.5 parts of lime and 0.5-1.5 parts of gypsum;
the preparation process of the degradable corrugated board comprises the following operation steps:
s1, determining the thickness of a face paper layer, the thickness of a corrugated layer and the thickness of an inner paper layer of a corrugated board to be manufactured according to actual requirements;
s2, determining the total gram weight of the corrugated board to be manufactured, the gram weight of the inner paper layer and the gram weight of the surface paper layer according to actual requirements;
s3, determining the mass fraction of the mycelium material in the raw material of the corrugated layer according to the thickness of the surface paper layer, the thickness of the corrugated layer, the thickness of the inner paper layer, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer;
s4, preparing a corrugated layer;
s5, bonding the inner paper layer, the corrugated layer and the surface paper layer by using glue, and drying to obtain the corrugated board;
the corrugated layer is wavy and is divided into a bending part and a straight line part, and the bending part is respectively connected with the inner surfaces of the inner paper layer and the surface paper layer in the bonding process of the step S5;
the included angle between the straight line part and the inner paper layer or the surface paper layer is determined by the thickness of the corrugated layer of the corrugated board and the mass fraction of the mycelium material in the raw material of the corrugated layer;
when (h 1 +h 3 ）/h 2 When p is more than 0.5 and less than or equal to 0.4, the included angle between the linear part and the inner paper layer or the surface paper layer is 60 degrees;
when (h 1 +h 3 ）/h 2 Less than or equal to 0.5 and p less than or equal to 0.4 or (h) 1 +h 3 ）/h 2 When the angle between the linear part and the inner paper layer or the surface paper layer is more than 0.5 and the angle between the linear part and the surface paper layer is more than 0.4, the included angle between the linear part and the inner paper layer or the surface paper layer is 45 degrees;
when (h 1 +h 3 ）/h 2 When p is less than or equal to 0.5 and more than 0.4, the included angle between the linear part and the inner paper layer or the surface paper layer is 30 degrees;
wherein p is the mass fraction of mycelium material in the corrugated layer, and the unit is 1;
h 1 、h 2 and h 3 The thickness of the face paper layer, the thickness of the corrugated layer and the thickness of the inner paper layer of the corrugated board are respectively in mm, and the thickness of the corrugated layer is the vertical height of the ridge of the corrugated layer;
the specific operation of the step S3 is that the thickness of the surface paper layer, the thickness of the corrugated layer, the thickness of the inner paper layer, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer of the corrugated board are substituted into a formula, and the mass fraction of the mycelium material in the raw material of the corrugated layer is calculated;
the formula is:；
wherein p is the mass fraction of mycelium material in the raw material of the corrugated layer, and the unit is 1;
h 1 、h 2 and h 3 The thickness of the face paper layer, the thickness of the corrugated layer and the thickness of the inner paper layer of the corrugated board are respectively in mm, and the thickness of the corrugated layer is the vertical height of the ridge of the corrugated layer;
W total (S) 、W Outer part And W is Inner lining The unit is m, which is the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the surface paper layer respectively 2 /g。
2. A degradable corrugated board according to claim 1, wherein the predetermined specifications of corrugated board include the following parameters: the thickness of the face paper layer of the corrugated board, the thickness of the corrugated layer, the thickness of the inner paper layer, the total gram weight of the corrugated board, the gram weight of the inner paper layer and the gram weight of the face paper layer; the thickness of the corrugated layer is the vertical height of the ridge of the corrugated layer.
3. A degradable corrugated board as set forth in claim 1, wherein,
the specific operation of the step S4 is as follows:
s401, adding mycelium materials into paper pulp according to the mass fraction determined in the step S3, uniformly stirring, carrying out papermaking by a conveying pump, forming paper sheets by net feeding, and then squeezing, dehydrating and drying to obtain corrugated base paper;
s402, performing edge pressing on the corrugated base paper by an edge pressing machine to obtain the corrugated base paper with the edge pressed;
s403, bonding 2-4 corrugated base papers with corrugated edges by adopting an adhesive to form a corrugated layer.
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CN109868681A (en) * 2019-02-20 2019-06-11 常州苏达欧包装材料有限公司 A kind of highly intensified corrugated paper ring pressure strengthening agent
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