CN109554959B - Kitchen paper and preparation process thereof - Google Patents
Kitchen paper and preparation process thereof Download PDFInfo
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- CN109554959B CN109554959B CN201811582203.0A CN201811582203A CN109554959B CN 109554959 B CN109554959 B CN 109554959B CN 201811582203 A CN201811582203 A CN 201811582203A CN 109554959 B CN109554959 B CN 109554959B
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- pulp
- base paper
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- 238000002360 preparation method Methods 0.000 title claims abstract description 10
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 95
- 239000010410 layer Substances 0.000 claims abstract description 92
- 239000002344 surface layer Substances 0.000 claims abstract description 92
- 239000002002 slurry Substances 0.000 claims description 76
- 239000011121 hardwood Substances 0.000 claims description 34
- 238000004537 pulping Methods 0.000 claims description 31
- 239000011122 softwood Substances 0.000 claims description 24
- 239000003292 glue Substances 0.000 claims description 19
- 238000010009 beating Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 239000002994 raw material Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 238000001035 drying Methods 0.000 claims description 12
- 238000000227 grinding Methods 0.000 claims description 12
- 241001397809 Hakea leucoptera Species 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 9
- 238000004061 bleaching Methods 0.000 claims description 7
- 239000004952 Polyamide Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920002647 polyamide Polymers 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000000835 fiber Substances 0.000 abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- 238000004049 embossing Methods 0.000 abstract description 10
- 230000000704 physical effect Effects 0.000 abstract description 8
- 230000005484 gravity Effects 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 210000004209 hair Anatomy 0.000 abstract description 3
- 238000005520 cutting process Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 239000002356 single layer Substances 0.000 description 5
- 239000000725 suspension Substances 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 2
- 241000196324 Embryophyta Species 0.000 description 1
- 229920002522 Wood fibre Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002025 wood fiber Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
-
- 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
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- 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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/30—Multi-ply
- D21H27/38—Multi-ply at least one of the sheets having a fibrous composition differing from that of other sheets
-
- 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
- B32B2307/728—Hydrophilic
-
- 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
- B32B2432/00—Cleaning articles, e.g. mops or wipes
-
- 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
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Landscapes
- Paper (AREA)
- Sanitary Thin Papers (AREA)
Abstract
The invention belongs to the technical field of household paper, and particularly relates to kitchen paper and a preparation process thereof. The invention gives different physical properties to the front and back sides of the paper through the embossing manufacturing process by double-layer headbox equipment, gives the soft and smooth surface of the paper with 100% bleached commodity short fibers on the front side, and improves the using body feeling. The back surface takes bleached commodity long fiber as a framework, and the high-yield mechanical pulp has the characteristics of high bulk and larger specific surface area, so that better water absorption and water locking functions are brought to the paper, and the prepared paper cannot cause rewet pollution to hands under the gravity wiping action. In addition, the compact outer surface layer formed by 100% of short fibers is not easy to fall off hair and powder, so that secondary pollution to wiped objects is avoided.
Description
Technical Field
The invention belongs to the technical field of household paper, and particularly relates to kitchen paper and a preparation process thereof.
Background
The kitchen paper is the special paper towel for the kitchen, has thick hand feeling and good water and oil absorption property as the name implies. Compared with the traditional rag, the kitchen paper is more sanitary and convenient, and is more and more favored by consumers in the aspects of household cleaning and the like.
Along with the improvement of living standard, the requirements of people on the functions of the household paper are higher and higher, and on the premise of meeting the functions of water absorption, wiping and the like, the paper is required to have good strength and not be broken easily, no paper scraps remain, and the paper is required to have good using hand feeling and pleasant mood. These requirements are reflected in the physical properties of the paper, i.e., the indicators of paper strength, softness, water absorption, bulk, run-off rate, etc. The gram weight is high, the paper strength is increased, the flexibility is poor, and the water absorption is good when the thickness is large. And the fiber has high softness, so that the fiber has high possibility of falling off the wool and the powder.
However, prior art kitchen papers have the following drawbacks in use: (1) The bleached commercial wood pulp is used, the pulping rate by the chemical method is lower, the utilization efficiency of plant fibers is lower, and the use cost is higher; (2) Under the condition that the gram weight is reduced and the integral use thickness cannot be met, the use purpose of water absorption and water locking is achieved by means of the hollow layer generated by point-to-point embossing, but under the condition of certain gravity wiping, the hollow water locking layer is pressed to cause wiped liquid to return to the surface, the cleaning efficiency is reduced, and hands are easy to pollute.
Technical proposal
In order to solve the technical problems in the prior art, the invention discloses novel kitchen paper with compact and smooth layer handfeel and excellent water absorption and water locking performance.
The specific technical scheme of the invention is as follows:
a kitchen paper base paper comprises bleached hardwood chemical pulp, bleached softwood chemical pulp and high-yield mechanical pulp.
Preferably, the kitchen paper comprises an upper surface layer and a lower surface layer, wherein the upper surface layer slurry comprises raw material bleached hardwood chemical pulp, and the lower surface layer slurry comprises raw material bleached softwood chemical pulp and high-yield mechanical pulp.
Preferably, the upper surface layer slurry is 100% bleached hardwood chemical slurry; the lower surface layer slurry comprises 10-25 parts by weight of bleached needle wood chemical slurry and 75-90 parts by weight of high-yield mechanical slurry.
Preferably, the upper surface layer slurry is 40 to 65 parts by weight and the lower surface layer slurry is 35 to 60 parts by weight.
The invention also discloses kitchen paper, which comprises an upper layer of the kitchen paper base paper and a lower layer of the kitchen paper base paper, wherein a hollow layer and a glue layer are arranged between the upper layer of the base paper and the lower layer of the base paper.
Preferably, the upper base paper and the lower base paper each comprise an upper surface layer and a lower surface layer, and the two lower surface layers of the upper base paper and the lower base paper are oppositely arranged.
Preferably, the hollow layer and the glue layer are uniformly distributed between the upper base paper layer and the lower base paper layer in a dot shape, and the hollow layer and the glue layer are arranged at intervals.
The invention also discloses a preparation process of the kitchen paper base paper, which comprises the following steps: pulping, mixing, dewatering and squeezing on a net, drying, wrinkling and coiling.
Preferably, the specific process steps of the kitchen paper base paper are as follows:
(1) Pulping:
pulping bleached hardwood chemical pulp: disc grinding and sticky pulping, wherein the fiber is split and broomed as far as possible, the concentration of the slurry is 7% -8%, and the beating degree of the slurry is controlled to be 25-35 DEG SR;
bleaching needle wood chemical pulp: disc grinding free pulping, properly cutting off the pulp on the basis of fully fluffing, controlling the pulp beating degree at 26-36 DEG SR, wherein the pulp concentration is 3.5% -5.5%;
high yield mechanical pulp: the fluffing of the light knife is mainly carried out, and the slurry beating degree is controlled to be 18-23 DEG SR;
(2) And (3) slurry mixing: taking bleached hardwood chemical pulp as paper upper surface layer pulp, taking bleached softwood chemical pulp and high-yield mechanical pulp as lower surface layer pulp, and uniformly mixing the pulp and polyamide epoxy resin (PAE) accounting for 0.15-0.35% of absolute dry pulp;
(3) And (3) carrying out dewatering and squeezing on the slurry uniformly mixed in the step (2) through a double-layer headbox, drying, wrinkling and coiling, and making the kitchen paper base paper with the ration of 20+/-2 g/square meter. The double-layer headbox is characterized in that two different stock suspensions can be sprayed, thereby imparting different physical properties to the front and back sides of a single-layer sheet.
The two lower surface layers of the upper base paper and the lower base paper are opposite through rewinding and point-to-point embossing processes,
and folding, slitting and packaging to obtain a kitchen paper finished product.
Advantageous effects
The novel kitchen paper is manufactured by using bleached hardwood chemical pulp, bleached softwood chemical pulp and high-yield mechanical pulp as raw materials and using double-layer headbox equipment through an embossing process, and the obtained kitchen paper has compact surface layer, soft and smooth hand feeling and excellent water absorption and water locking performance of the inner layer.
The invention gives different physical properties to the front and back sides of the paper through the embossing manufacturing process by double-layer headbox equipment, gives the soft and smooth surface of the paper with 100% bleached commodity short fibers on the front side, and improves the using body feeling. The back surface takes bleached commodity long fiber as a framework, and the high-yield mechanical pulp has the characteristics of high bulk and larger specific surface area, so that better water absorption and water locking functions are brought to the paper, and the prepared paper cannot cause rewet pollution to hands under the gravity wiping action. In addition, the compact outer surface layer formed by 100% of short fibers is not easy to fall off hair and powder, so that secondary pollution to wiped objects is avoided.
The liquid absorption of the paper sheet is related to the micropore structure of the finished paper, the liquid absorption can be improved under the capillary action, and compared with chemical pulp, the high-yield mechanical pulp has the characteristics of larger and stiff fiber and high bulk due to the fact that most lignin is reserved, and the high-yield mechanical pulp has more fine fiber content and larger specific surface area of the fiber surface. The bleached needle wood fiber is long and tough and serves as a fiber network framework. The structure gives the paper better liquid absorption capacity, brings better water absorption and water locking functions for the paper, and the prepared paper cannot cause rewet and pollute hands under the gravity wiping action.
The high-yield mechanical pulp is better environment-friendly green pulp due to lower pollution load in the production process. The yield is generally 80-90%, and the utilization rate of the raw materials is improved, thereby reducing the production cost of the fiber raw materials.
The bleached hardwood chemical pulp with 100% is used as an upper surface layer (surface layer) to be in direct contact with consumers, and the fiber length and the coarseness of the bleached hardwood chemical pulp are lower than those of the softwood chemical pulp, so that the surface of the finished paper is better in smoothness and softness, and the use experience is improved. In addition, the compact outer surface layer formed by 100% of short fibers has high surface strength, prevents the phenomenon of hair and powder falling, and reduces secondary pollution on the surface of an object in the wiping process.
The high-yield mechanical pulp is applied to the inner surface of the paper sheet to form more micropore structures. Under the action of gravity wiping, moisture which cannot be adsorbed by the hollow water-absorbing and water-blocking layer generated by point-to-point embossing can be adsorbed by the inner surface of the paper sheet. Meanwhile, under the combined action of a compact surface layer formed by bleaching the hardwood chemical pulp on the outer surface, liquid is prevented from flowing back, and hands are not polluted.
Drawings
FIG. 1 is a schematic view of a kitchen paper according to the present invention;
in the figure: 1: upper base paper; 2: a lower base paper; 3: a hollow layer; 4: a glue layer; 5: an upper surface layer; 6: a lower surface layer.
Detailed Description
Example 1
A kitchen paper base paper comprises bleached hardwood chemical pulp, bleached softwood chemical pulp and high-yield mechanical pulp. The kitchen paper comprises an upper surface layer and a lower surface layer, wherein the upper surface layer slurry comprises raw material bleached hardwood chemical pulp, and the lower surface layer slurry comprises raw material bleached softwood chemical pulp and high-yield mechanical pulp. The upper surface layer slurry is 100% bleached hardwood chemical slurry; the lower surface layer slurry comprises 25 parts by weight of bleached softwood chemical pulp and 75 parts by weight of high-yield mechanical pulp. The upper surface layer slurry is 40 parts by weight, and the lower surface layer slurry is 60 parts by weight.
The preparation process of the kitchen paper base paper comprises the following steps: pulping, mixing, dewatering and squeezing on a net, drying, wrinkling and coiling, and the specific process steps are as follows:
(1) Pulping:
pulping bleached hardwood chemical pulp: disc grinding and sticky pulping, separating and brooming the fiber as far as possible, controlling the slurry concentration to be 7% -8% and the slurry beating degree to be 30 DEG SR;
bleaching needle wood chemical pulp: disc grinding free pulping, properly cutting off the pulp on the basis of fully fluffing, controlling the pulp beating degree at 32 DEG SR, wherein the pulp concentration is 3.5% -5.5%;
high yield mechanical pulp: the fluffing of the light knife is mainly carried out, and the slurry beating degree is controlled to be 20 DEG SR;
(2) And (3) slurry mixing: taking bleached hardwood chemical pulp as paper upper surface layer pulp, taking bleached softwood chemical pulp and high-yield mechanical pulp as lower surface layer pulp, and uniformly mixing the pulp and polyamide epoxy resin (PAE) accounting for 0.3 percent of the weight of absolute dry pulp;
(3) And (3) carrying out dewatering and squeezing on the slurry uniformly mixed in the step (2) through a double-layer headbox, drying, wrinkling and coiling, and making the kitchen paper base paper with the ration of 20+/-2 g/square meter. The double-layer headbox is characterized in that two different stock suspensions can be sprayed, thereby imparting different physical properties to the front and back sides of a single-layer sheet.
The prepared kitchen paper base paper is subjected to rewinding and point-to-point embossing processes, so that the two lower surface layers of the upper base paper and the lower base paper are opposite, and the kitchen paper base paper is folded, cut and packaged into a kitchen paper finished product. The properties of the resulting kitchen paper are shown in table 1.
As shown in fig. 1, the kitchen paper comprises an upper layer of the kitchen paper base paper and a lower layer of the kitchen paper base paper, and a hollow layer 3 and a glue layer 4 are arranged between the upper layer of the kitchen paper base 1 and the lower layer of the kitchen paper base 2. The upper base paper and the lower base paper comprise an upper surface layer 5 and a lower surface layer 6, and the two lower surface layers of the upper base paper and the lower base paper are oppositely arranged. The hollow layer and the glue layer are uniformly distributed between the upper base paper layer and the lower base paper layer in a dot shape, and the hollow layer and the glue layer are arranged at intervals.
Example 2
A kitchen paper base paper comprises bleached hardwood chemical pulp, bleached softwood chemical pulp and high-yield mechanical pulp. The kitchen paper comprises an upper surface layer and a lower surface layer, wherein the upper surface layer slurry comprises raw material bleached hardwood chemical pulp, and the lower surface layer slurry comprises raw material bleached softwood chemical pulp and high-yield mechanical pulp. The upper surface layer slurry is 100% bleached hardwood chemical slurry; the lower surface layer slurry comprises 10 parts by weight of bleached softwood chemical pulp and 90 parts by weight of high-yield mechanical pulp. The upper surface layer slurry was 55 parts by weight, and the lower surface layer slurry was 45 parts by weight.
The preparation process of the kitchen paper base paper comprises the following steps: pulping, mixing, dewatering and squeezing on a net, drying, wrinkling and coiling, and the specific process steps are as follows:
(1) Pulping:
pulping bleached hardwood chemical pulp: disc grinding and sticky pulping, separating and brooming the fiber as far as possible, controlling the pulp beating degree at 28 DEG SR, wherein the pulp concentration is 7% -8%;
bleaching needle wood chemical pulp: disc grinding free pulping, properly cutting off the pulp on the basis of fully fluffing, controlling the pulp beating degree at 34 DEG SR, wherein the pulp concentration is 3.5% -5.5%;
high yield mechanical pulp: the fluffing of the light knife is mainly carried out, and the slurry beating degree is controlled to be 20 DEG SR;
(2) And (3) slurry mixing: taking bleached hardwood chemical pulp as paper upper surface layer pulp, taking bleached softwood chemical pulp and high-yield mechanical pulp as lower surface layer pulp, and uniformly mixing the pulp and polyamide epoxy resin (PAE) accounting for 0.28% of the absolute dry pulp;
(3) And (3) carrying out dewatering and squeezing on the slurry uniformly mixed in the step (2) through a double-layer headbox, drying, wrinkling and coiling, and making the kitchen paper base paper with the ration of 20+/-2 g/square meter. The double-layer headbox is characterized in that two different stock suspensions can be sprayed, thereby imparting different physical properties to the front and back sides of a single-layer sheet.
The prepared kitchen paper base paper is subjected to rewinding and point-to-point embossing processes, so that the two lower surface layers of the upper base paper and the lower base paper are opposite, and the kitchen paper base paper is folded, cut and packaged into a kitchen paper finished product. The properties of the resulting kitchen paper are shown in table 1.
As shown in fig. 1, the kitchen paper comprises an upper layer of the kitchen paper base paper and a lower layer of the kitchen paper base paper, and a hollow layer and a glue layer are arranged between the upper layer of the kitchen paper base paper and the lower layer of the kitchen paper base paper. The upper base paper and the lower base paper comprise an upper surface layer and a lower surface layer, and the two lower surface layers of the upper base paper and the lower base paper are oppositely arranged. The hollow layer and the glue layer are uniformly distributed between the upper base paper layer and the lower base paper layer in a dot shape, and the hollow layer and the glue layer are arranged at intervals.
Example 3
A kitchen paper base paper comprises bleached hardwood chemical pulp, bleached softwood chemical pulp and high-yield mechanical pulp. The kitchen paper comprises an upper surface layer and a lower surface layer, wherein the upper surface layer slurry comprises raw material bleached hardwood chemical pulp, and the lower surface layer slurry comprises raw material bleached softwood chemical pulp and high-yield mechanical pulp. The upper surface layer slurry is 100% bleached hardwood chemical slurry; the lower surface layer slurry comprises 20 parts by weight of bleached softwood chemical pulp and 80 parts by weight of high-yield mechanical pulp. The upper surface layer slurry was 65 parts by weight, and the lower surface layer slurry was 35 parts by weight.
The preparation process of the kitchen paper base paper comprises the following steps: pulping, mixing, dewatering and squeezing on a net, drying, wrinkling and coiling, and the specific process steps are as follows:
(1) Pulping:
pulping bleached hardwood chemical pulp: disc grinding and sticky pulping, separating and brooming the fiber as far as possible, controlling the slurry concentration to be 7% -8% and the slurry beating degree to be 35 DEG SR;
bleaching needle wood chemical pulp: disc grinding free pulping, properly cutting off the pulp on the basis of fully fluffing, controlling the pulp beating degree at 26 DEG SR, wherein the pulp concentration is 3.5% -5.5%;
high yield mechanical pulp: the fluffing of the light knife is mainly carried out, and the slurry beating degree is controlled at 18 degrees SR;
(2) And (3) slurry mixing: taking bleached hardwood chemical pulp as paper upper surface layer pulp, taking bleached softwood chemical pulp and high-yield mechanical pulp as lower surface layer pulp, and uniformly mixing the pulp and polyamide epoxy resin (PAE) accounting for 0.15% of the absolute dry pulp weight;
(3) And (3) carrying out dewatering and squeezing on the slurry uniformly mixed in the step (2) through a double-layer headbox, drying, wrinkling and coiling, and making the kitchen paper base paper with the ration of 20+/-2 g/square meter. The double-layer headbox is characterized in that two different stock suspensions can be sprayed, thereby imparting different physical properties to the front and back sides of a single-layer sheet.
The prepared kitchen paper base paper is subjected to rewinding and point-to-point embossing processes, so that the two lower surface layers of the upper base paper and the lower base paper are opposite, and the kitchen paper base paper is folded, cut and packaged into a kitchen paper finished product. The properties of the resulting kitchen paper are shown in table 1.
As shown in fig. 1, the kitchen paper comprises an upper layer of the kitchen paper base paper and a lower layer of the kitchen paper base paper, and a hollow layer and a glue layer are arranged between the upper layer of the kitchen paper base paper and the lower layer of the kitchen paper base paper. The upper base paper and the lower base paper comprise an upper surface layer and a lower surface layer, and the two lower surface layers of the upper base paper and the lower base paper are oppositely arranged. The hollow layer and the glue layer are uniformly distributed between the upper base paper layer and the lower base paper layer in a dot shape, and the hollow layer and the glue layer are arranged at intervals.
Example 4
A kitchen paper base paper comprises bleached hardwood chemical pulp, bleached softwood chemical pulp and high-yield mechanical pulp. The kitchen paper comprises an upper surface layer and a lower surface layer, wherein the upper surface layer slurry comprises raw material bleached hardwood chemical pulp, and the lower surface layer slurry comprises raw material bleached softwood chemical pulp and high-yield mechanical pulp. The upper surface layer slurry is 100% bleached hardwood chemical slurry; the lower surface layer slurry comprises 25 parts by weight of bleached softwood chemical pulp and 75 parts by weight of high-yield mechanical pulp. The upper surface layer slurry was 65 parts by weight, and the lower surface layer slurry was 35 parts by weight.
The preparation process of the kitchen paper base paper comprises the following steps: pulping, mixing, dewatering and squeezing on a net, drying, wrinkling and coiling, and the specific process steps are as follows:
(1) Pulping:
pulping bleached hardwood chemical pulp: disc grinding and sticky pulping, separating and brooming the fiber as far as possible, controlling the slurry concentration to be 7% -8% and the slurry beating degree to be 27 DEG SR;
bleaching needle wood chemical pulp: disc grinding free pulping, properly cutting off the pulp on the basis of fully fluffing, controlling the pulp beating degree at 36 DEG SR, wherein the pulp concentration is 3.5% -5.5%;
high yield mechanical pulp: the fluffing of the light knife is mainly carried out, and the slurry beating degree is controlled at 23 DEG SR;
(2) And (3) slurry mixing: taking bleached hardwood chemical pulp as paper upper surface layer pulp, taking bleached softwood chemical pulp and high-yield mechanical pulp as lower surface layer pulp, and uniformly mixing the pulp and polyamide epoxy resin (PAE) accounting for 0.35% of the absolute dry pulp weight;
(3) And (3) carrying out dewatering and squeezing on the slurry uniformly mixed in the step (2) through a double-layer headbox, drying, wrinkling and coiling, and making the kitchen paper base paper with the ration of 20+/-2 g/square meter. The double-layer headbox is characterized in that two different stock suspensions can be sprayed, thereby imparting different physical properties to the front and back sides of a single-layer sheet.
The prepared kitchen paper base paper is subjected to rewinding and point-to-point embossing processes, so that the two lower surface layers of the upper base paper and the lower base paper are opposite, and the kitchen paper base paper is folded, cut and packaged into a kitchen paper finished product. The properties of the resulting kitchen paper are shown in table 1.
As shown in fig. 1, the kitchen paper comprises an upper layer of the kitchen paper base paper and a lower layer of the kitchen paper base paper, and a hollow layer and a glue layer are arranged between the upper layer of the kitchen paper base paper and the lower layer of the kitchen paper base paper. The upper base paper and the lower base paper comprise an upper surface layer and a lower surface layer, and the two lower surface layers of the upper base paper and the lower base paper are oppositely arranged. The hollow layer and the glue layer are uniformly distributed between the upper base paper layer and the lower base paper layer in a dot shape, and the hollow layer and the glue layer are arranged at intervals.
TABLE 1 Performance of the kitchen paper obtained according to the invention
Claims (7)
1. A kitchen paper base paper, characterized in that: including raw material bleached hardwood chemical pulp, bleached softwood chemical pulp and high yield mechanical pulp; the kitchen paper base paper comprises an upper surface layer and a lower surface layer, wherein the upper surface layer slurry comprises raw material bleached hardwood chemical pulp, and the lower surface layer slurry comprises raw material bleached softwood chemical pulp and high-yield mechanical pulp; the preparation process of the kitchen paper base paper comprises the following steps: pulping, mixing, dewatering and squeezing on a net, drying, wrinkling and coiling; the specific process steps are as follows:
(1) Pulping:
pulping bleached hardwood chemical pulp: disc grinding and sticky pulping, wherein the concentration of the slurry is 7% -8%, and the beating degree of the slurry is controlled to be 25-35 o SR；
Bleaching needle wood chemical pulp: disc grinding free pulping, wherein the concentration of the slurry is 3.5% -5.5%, and the beating degree of the slurry is controlled to be 26-36 o SR；
High yield mechanical pulp: the light knife fluffing is mainly performed, and the slurry beating degree is controlled to be 18-23 o SR；
(2) And (3) slurry mixing: taking bleached hardwood chemical pulp as paper upper surface layer pulp, taking bleached softwood chemical pulp and high-yield mechanical pulp as lower surface layer pulp, and uniformly mixing the pulp and polyamide epoxy resin accounting for 0.15-0.35% of absolute dry pulp;
(3) And (3) dewatering, squeezing, drying, wrinkling and coiling the slurry uniformly mixed in the step (2) on a net to obtain the kitchen paper base paper.
2. The kitchen paper base stock according to claim 1, characterized in that: the upper surface layer slurry is bleached hardwood chemical slurry; the lower surface layer slurry comprises 10-25 parts by weight of bleached needle wood chemical slurry and 75-90 parts by weight of high-yield mechanical slurry.
3. The kitchen paper base stock according to claim 2, characterized in that: 40-65 parts by weight of upper surface layer slurry and 35-60 parts by weight of lower surface layer slurry.
4. A kitchen paper, characterized in that: the kitchen paper comprises an upper layer of kitchen paper base paper and a lower layer of kitchen paper base paper according to any one of claims 1-3, wherein a hollow layer and a glue layer are arranged between the upper layer of base paper and the lower layer of base paper.
5. Kitchen paper according to claim 4, characterized in that: the upper base paper and the lower base paper comprise an upper surface layer and a lower surface layer, and the two lower surface layers of the upper base paper and the lower base paper are oppositely arranged.
6. Kitchen paper according to claim 4, characterized in that: the hollow layer and the glue layer are uniformly distributed between the upper base paper layer and the lower base paper layer in a dot shape.
7. Kitchen paper according to claim 4, characterized in that: the hollow layer and the glue layer are arranged at intervals.
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| CN201811582203.0A CN109554959B (en) | 2018-12-24 | 2018-12-24 | Kitchen paper and preparation process thereof |
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| CN109554959B true CN109554959B (en) | 2023-08-18 |
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| CN111636229A (en) * | 2020-05-21 | 2020-09-08 | 山东太阳生活用纸有限公司 | Double-layer roll toilet paper and preparation method thereof |
| CN112695570A (en) * | 2020-12-25 | 2021-04-23 | 牡丹江恒丰纸业股份有限公司 | Preparation method of antibacterial food wiping paper |
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| CN102677548A (en) * | 2012-05-28 | 2012-09-19 | 金红叶纸业集团有限公司 | Life paper and manufacture method thereof |
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