Kitchen paper with high wet strength and high water absorption performance and preparation method thereof

Abstract

The invention discloses kitchen paper with high wet strength and high water absorption performance and a preparation method thereof.The knurling surface layer is provided with a first knurling unit and a second knurling unit, and the first knurling unit comprises a plurality of first protruding parts vertically and upwards arranged towards the upper surface of the knurling surface layer; the second embossing unit comprises a plurality of second protruding parts which face the embossing bottom layer and are arranged downwards. The knurling bottom layer is provided with a third knurling unit and a fourth knurling unit, the third knurling unit comprises a plurality of third protruding parts upwards arranged towards the knurling surface layer, and the fourth knurling unit comprises a plurality of fourth protruding parts vertically downwards arranged towards the lower surface of the knurling bottom layer; the first protruding part and the third protruding part form a first water storage unit, and the second protruding part and the fourth protruding part form a second water storage unit. According to the kitchen paper, the wet strength can be greatly improved, the aesthetic feeling can be improved, and the water absorption capacity is improved.

Description

Technical Field

[0001] The invention relates to the field of kitchen paper, in particular to a kitchen paper with high wet strength and high water absorption performance and a preparation method thereof. Background Art

[0002] As a clean and efficient sanitary paper product, kitchen paper has been widely favored by consumers since its invention. Although traditional kitchen paper is widely used in life, it has certain defects in water absorption, strength and softness due to its relatively simple manufacturing materials and processes. For example, after contacting water, traditional kitchen paper is easily deformed or broken, and it is also difficult to effectively absorb water, which limits its actual use effect.

[0003] The prior art increases the water absorption capacity of kitchen paper by stacking multiple layers of paper, but this not only causes waste of paper, but also fails to fundamentally solve the problem of poor water absorption performance of kitchen paper per unit mass. Summary of the invention

[0004] In view of this, the present invention provides a kitchen paper with high wet strength and high water absorption performance and a preparation method thereof. The present invention greatly improves the wet strength of the kitchen paper by adding a variety of green and non-toxic wet strength agents on the basis of the embossing process, thereby solving the problems of traditional kitchen paper being easy to break and collapse after absorbing water; the kitchen paper of the present invention adopts a double-layer composite embossing art, which can not only improve the aesthetics of the kitchen paper, but also further improve the water absorption capacity of the kitchen paper.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A kitchen paper with high wet strength and high water absorption performance, comprising an embossed surface layer and an embossed bottom layer, wherein the embossed surface layer and the embossed bottom layer are arranged from top to bottom in a vertical direction, wherein the embossed surface layer is provided with a first embossed unit and a second embossed unit, wherein the first embossed unit comprises a plurality of first protrusions arranged vertically upward toward the upper surface of the embossed surface layer, and the second embossed unit comprises a plurality of second protrusions arranged downward toward the embossed bottom layer; wherein the embossed bottom layer is provided with a third embossed unit and a fourth embossed unit, wherein the third embossed unit comprises a plurality of third protrusions arranged upward toward the embossed surface layer, and the fourth embossed unit comprises a plurality of fourth protrusions arranged vertically downward toward the lower surface of the embossed bottom layer;

[0007] The first protrusion and the third protrusion have the same protrusion direction, and the first protrusion and the third protrusion are in contact with each other and nested, forming a first water storage unit when nested, and arranged toward the upper surface of the embossed surface layer; the second protrusion and the fourth protrusion have the same protrusion direction, and the second protrusion and the fourth protrusion are in contact with each other and nested, forming a second water storage unit when nested, and arranged toward the lower surface of the embossed bottom layer;

[0008] Preferably, the first embossing unit 10 is arranged on the lower bottom surface of the embossed surface layer opposite to the embossed bottom layer; the lower bottom surface of the embossed bottom layer is provided with a second embossing unit 20, and the second embossing unit is arranged on the lower bottom surface of the embossed bottom layer opposite to the embossed surface layer.

[0009] A method for preparing kitchen paper with high wet strength and high water absorption performance comprises adding a plurality of additive compositions to paper stock before forming the paper sheets for papermaking, wherein the additives include graft copolymerized starch, polyvinyl alcohol and polyvinyl amine.

[0010] Preferably, the graft copolymer starch is acrylamide graft copolymer starch.

[0011] Preferably, the content of the graft copolymer starch is 45-55%, the content of the polyvinyl alcohol is 45-55%, and the content of the polyvinyl amine is 5-20%.

[0012] Preferably, the ratio of the graft copolymer starch: polyvinyl alcohol: polyvinyl amine is 2:2:1.

[0013] Preferably, the total amount of the graft copolymer starch, polyvinyl alcohol and polyvinyl amine added to the slurry is 1% to 5% of the absolute dry weight of the paper sheet.

[0014] Preferably, the slurry is mixed with the graft copolymerized starch, polyvinyl alcohol and polyvinyl amine in sequence or simultaneously.

[0015] Preferably, the polyvinyl alcohol is a synthetic resin obtained by polymerizing vinyl alcohol monomers.

[0016] Preferably, the polyvinylamine is obtained by 1-100% hydrolysis of a homopolymer of N-vinylamide.

[0017] Compared with the prior art, the present invention has achieved the following technical effects:

[0018] (1) The present invention can significantly improve the wet strength of the kitchen paper, thereby solving the problems of traditional kitchen paper being easily broken and collapsed after absorbing water.

[0019] (2) The double-layer composite embossing process adopted in the present invention can not only enhance the aesthetics of the kitchen paper, but also further enhance the water absorption capacity of the kitchen paper. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a diagram showing the embossed surface structure of a kitchen paper with high wet strength and high water absorption performance and a preparation method thereof according to the present invention;

[0021] Figure 2 This is a structural diagram of an embossed bottom layer of a kitchen paper with high wet strength and high water absorption performance and a preparation method thereof according to the present invention;

[0022] Figure 3 The kitchen paper structure diagram of the present invention is a kitchen paper with high wet strength and high water absorption performance and a preparation method thereof.

[0023] Among them, 1. embossed surface layer; 2. embossed bottom layer; 10. first embossed unit; 20. second embossed unit; 30. third embossed unit; 40. fourth embossed unit; 11. first raised portion; 21. second raised portion; 31. third raised portion; 41. fourth raised portion; 100. first water storage unit; 200. second water storage unit. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] The present invention discloses a kitchen paper with high wet strength and high water absorption performance, comprising an embossed surface layer 1 and an embossed bottom layer 2, wherein the embossed surface layer 1 and the embossed bottom layer 2 are arranged from top to bottom in a vertical direction, the embossed surface layer 1 is provided with a first embossed unit 10 and a second embossed unit 20, the first embossed unit 10 comprises a plurality of first protrusions 11 arranged vertically upwardly toward the upper surface of the embossed surface layer 1, and the second embossed unit 20 comprises a plurality of second protrusions 21 arranged downwardly toward the embossed bottom layer 2; the embossed bottom layer 2 is provided with a third embossed unit 30 and a fourth embossed unit 40, the third embossed unit 30 comprises a plurality of third protrusions 31 arranged upwardly toward the embossed surface layer 1, and the fourth embossed unit 40 comprises a plurality of fourth protrusions 41 arranged vertically downwardly toward the lower surface of the embossed bottom layer 2;

[0026] The protrusion directions of the first protrusion 11 and the third protrusion 31 are consistent, and the first protrusion 11 and the third protrusion 31 are in contact with each other and nested, forming a first water storage unit 100 when nested, and arranged toward the upper surface of the embossed surface layer 1; the protrusion directions of the second protrusion 21 and the fourth protrusion 41 are consistent, and the second protrusion 21 and the fourth protrusion 41 are in contact with each other and nested, forming a second water storage unit 200 when nested, and arranged toward the lower surface of the embossed bottom layer 2.

[0027] The first embossing unit 10 is arranged on the lower bottom surface of the embossed surface layer 1 opposite to the embossed bottom layer 2; the lower bottom surface of the embossed bottom layer 2 is provided with a second embossing unit 20, and the second embossing unit 20 is arranged on the lower bottom surface of the embossed bottom layer 2 opposite to the embossed surface layer 1.

[0028] The first embossing unit 10 includes a plurality of first protrusions 11 protruding toward the embossed surface layer 1, and the first protrusions 11 are in contact with the upper surface of the embossed bottom layer 2; the second embossing unit 20 includes a plurality of second protrusions 21 protruding downward, and the first embossing units 10 of the embossed surface layer 1 and the second embossing units 20 of the embossed bottom layer 2 are in contact with and nested with each other, so that a water storage groove is formed on the embossed bottom layer 2, further expanding the water absorption capacity of the kitchen paper.

[0029] Among them, the first raised portion 11 is formed by embossing the embossed surface layer 1 toward the upper surface of the embossed surface layer 1, and the third raised portion 31 is formed by embossing the embossed bottom layer 2 toward the embossed surface layer 1. Since the embossed surface layer 1 and the embossed bottom layer 2 are double-layer composite embossing, the first raised portion 11 of the embossed surface layer 1 and the third raised portion 31 of the embossed bottom layer 2 are nested with each other to form a first water storage unit 100; the second raised portion 21 is formed by concavely pressing the embossed surface layer 1 toward the embossed bottom layer 2, and the fourth raised portion 41 is formed by concavely pressing the embossed bottom layer 2 toward the lower surface of the embossed bottom layer 2. Since the embossed surface layer 1 and the embossed bottom layer 2 are double-layer composite embossing, the second raised portion 21 of the embossed surface layer 1 and the fourth raised portion 41 of the embossed bottom layer 2 are nested with each other to form a second water storage unit 200.

[0030] The protrusion height of the first protrusion 11 is the same as the protrusion height of the third protrusion 31 .

[0031] The protrusion height of the second protrusion 21 is the same as the protrusion height of the fourth protrusion 41 .

[0032] The embossed surface layer 1 and the embossed bottom layer 2 have the same pattern and are nested with each other.

[0033] The protrusion height of the first protrusion 11 is 1-5 mm, the protrusion height of the second protrusion 21 is 0.5-1.5 mm, the protrusion height of the third protrusion 31 is 1-5 mm, and the protrusion height of the fourth protrusion 41 is 0.5-1.5 mm.

[0034] The first protrusion 11 and the third protrusion 31 are both hemispherical, and the second protrusion 21 and the fourth protrusion 41 are also hemispherical.

[0035] The hemispherical diameter of the first protrusion 11 is 2-8 mm, the hemispherical diameter of the second protrusion 21 is 1-3 mm, the hemispherical diameter of the third protrusion 31 is 2-8 mm, and the hemispherical diameter of the fourth protrusion 41 is 1-3 mm.

[0036] In this embodiment, the embossed surface layer 1 and the embossed bottom layer 2 are compositely embossed at a pressure of 0.15 to 0.65 MPa, thereby connecting the embossed surface layer 1 and the embossed bottom layer 2, thereby ensuring the connection stability between the embossed surface layer 1 and the embossed bottom layer 2.

[0037] The first embossing unit 10, the second embossing unit 20, the third embossing unit 30 and the fourth embossing unit 40 all perform lamination embossing at a pressure of 0.15 to 0.6 MPa, wherein the minimum embossing pressure required without affecting actual use is 0.15 MPa, and 0.65 MPa is the maximum pressure value that can be used within a reasonable range of reasonable consideration in the present invention.

[0038] The present invention also discloses a method for preparing kitchen paper with high wet strength and high water absorption performance, wherein a plurality of additive compositions are added to paper stock before the paper sheet is formed for papermaking, wherein the additives include: graft copolymer starch, polyvinyl alcohol and polyvinyl amine;

[0039] The content of graft copolymer starch is 45-55%, the content of polyvinyl alcohol is 45-55%, and the content of polyvinyl amine is 5-20%;

[0040] The ratio of graft copolymer starch: polyvinyl alcohol: polyvinyl amine is 2:2:1;

[0041] The total amount of graft copolymer starch, polyvinyl alcohol and polyvinyl amine is added into the pulp in a proportion of 1% to 5% of the absolute dry weight of the paper sheet;

[0042] The slurry is mixed with the graft copolymer starch, polyvinyl alcohol and polyvinyl amine in sequence or simultaneously;

[0043] Wherein, the graft copolymer starch is acrylamide graft copolymer starch;

[0044] Polyvinyl alcohol is a synthetic resin made by polymerizing vinyl alcohol monomers;

[0045] Polyvinylamine is obtained by 1-100% hydrolysis of a homopolymer of N-vinylamide.

[0046] Embodiment 1:

[0047] A kitchen paper with high wet strength and high water absorption performance is provided, wherein an embossed surface layer 1 and an embossed bottom layer 2 are provided, and before the paper sheets are formed, graft copolymer starch, polyvinyl alcohol and polyvinyl amine are added to the paper stock for papermaking, wherein the ratio of graft copolymer starch: polyvinyl alcohol: polyvinyl amine is 2:2:1.

[0048] In comparative example 1, the first protrusion 11 and the protrusion height of the third protrusion 31 are increased by 50% on the basis of example 1, and the rest of the experimental process is consistent with example 1;

[0049] In comparative example 2, the distance between the first embossing unit 10 and the second embossing unit 20 is increased, and the distance between the third embossing unit and the fourth embossing unit is increased by 50% on the basis of example 1. The rest of the experimental process is consistent with example 1.

[0050] The relevant detection of the present invention is shown in Table 1:

[0051] Table 1:

[0052]

[0053]

[0054] It can be seen from Table 1 above that, whether in terms of water absorption or water absorption rate, Example 1 is higher than the comparative example and the commercial product example. The water absorption of Example 1 is increased by 17.52% compared with the commercial product example. Compared with Comparative Examples 1 and 2, the water absorption is increased by 5.56% and 27.6%; in terms of water absorption rate, Example 1 is increased by 9.8% compared with the commercial product example. Compared with Comparative Examples 1 and 2, the water absorption rate is increased by 0.5% and 6.23%. The bulk of Example 1 is increased by 3.54% and 2.3% compared with the commercial product example and Comparative Example 2. Compared with Comparative Example 1, the bulk is reduced by 3%, but the water absorption, water absorption rate and tensile index of Comparative Example 1 are all lower than those of Example 1. It can be seen that whether it is water absorption performance or bulk, the kitchen paper obtained in Example 1 of the present invention is better than the commercial product example and Comparative Examples 1 and 2.

[0055] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A kitchen paper with high wet strength and high water absorption performance, comprising an embossed surface layer (1) and an embossed bottom layer (2), wherein the embossed surface layer (1) and the embossed bottom layer (2) are arranged vertically from top to bottom, characterized in that: The embossed surface layer (1) is provided with a first embossing unit (10) and a second embossing unit (20), wherein the first embossing unit (10) comprises a plurality of first protrusions (11) vertically arranged upwardly toward the upper surface of the embossed surface layer (1), and the second embossing unit (20) comprises a plurality of second protrusions (21) vertically arranged downwardly toward the embossed bottom layer (2); the embossed bottom layer (2) is provided with a third embossing unit (30) and a fourth embossing unit (40), wherein the third embossing unit (30) comprises a plurality of third protrusions (31) vertically arranged upwardly toward the embossed surface layer (1), and the fourth embossing unit (40) comprises a plurality of fourth protrusions (41) vertically arranged downwardly toward the lower surface of the embossed bottom layer (2); The protrusion directions of the first protrusion (11) and the third protrusion (31) are consistent, and the first protrusion (11) and the third protrusion (31) are in contact with each other and nested, forming a first water storage unit (100) when nested, and arranged toward the upper surface of the embossed surface layer (1); the protrusion directions of the second protrusion (21) and the fourth protrusion (41) are consistent, and the second protrusion (21) and the fourth protrusion (41) are in contact with each other and nested, forming a second water storage unit (200) when nested, and arranged toward the lower surface of the embossed bottom layer (2).

2. The kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The first embossing unit 10 is arranged on the lower bottom surface of the embossed surface layer opposite to the embossed bottom layer; the lower bottom surface of the embossed bottom layer is provided with a second embossing unit 20, and the second embossing unit is arranged on the lower bottom surface of the embossed bottom layer opposite to the embossed surface layer.

3. A method for preparing kitchen paper with high wet strength and high water absorption performance, characterized in that: Before forming the paper sheets, a plurality of additive compositions are added to the paper stock for papermaking, wherein the additives include graft copolymerized starch, polyvinyl alcohol and polyvinyl amine.

4. The method for preparing kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The graft copolymer starch is acrylamide graft copolymer starch.

5. The method for preparing kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The content of the graft copolymer starch is 45-55%, the content of the polyvinyl alcohol is 45-55%, and the content of the polyvinyl amine is 5-20%.

6. The method for preparing kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The ratio of the graft copolymer starch: polyvinyl alcohol: polyvinyl amine is 2:2:

1.

7. The method for preparing kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The total amount of the graft copolymer starch, polyvinyl alcohol and polyvinyl amine added to the pulp is 1% to 5% of the absolute dry weight of the paper sheet.

8. The method for preparing kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The slurry is mixed with the graft copolymer starch, polyvinyl alcohol and polyvinyl amine in sequence or simultaneously.

9. The method for preparing kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The polyvinyl alcohol is a synthetic resin obtained by polymerizing vinyl alcohol monomers.

10. The method for preparing kitchen paper with high wet strength and high water absorption performance according to claim 1, characterized in that: The polyvinylamine is obtained by 1-100% hydrolysis of a homopolymer of N-vinylamide.

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