Wet toilet wipe substrate and preparation method thereof

Abstract

The present invention provides a wet toilet wipe substrate and a preparation method thereof, and relates to the technical field of daily necessities. The preparation method of the wet toilet wipe substrate provided by the present invention comprises the following steps: deflaking the fiber raw material in water to obtain a deflaked fiber system; mixing the deflaked fiber system with an auxiliary agent, and making paper to obtain a wet toilet wipe substrate. The present invention adopts a wet papermaking method to prepare the wet toilet wipe substrate, which has a simple process and higher production efficiency, can reduce the production cost of the wet toilet wipe substrate, and is suitable for promotion and application. Moreover, the wet toilet wipe substrate prepared by the present invention has high strength and softness, is easily dispersed in water, and is degradable.

Description

Technical Field

[0001] The present invention relates to the technical field of daily necessities, and in particular to a wet toilet wipe substrate and a preparation method thereof. Background Art

[0002] With the development of science and technology, the changes of the times, and the improvement of residents' living standards, toilet paper, which is indispensable in life, has also undergone a process of renewal, from traditional flat paper to soft roll paper, and then to wet toilet paper, which has been recognized by people as soon as it appeared on the market. Compared with ordinary dry paper towels, wet toilet paper can not only wipe off the dirt that dry paper cannot wipe off, but also high-quality wet toilet paper can effectively wipe off 99.9% of bacteria (usually without bactericides), so it has become a revolutionary new product in the toilet paper industry.

[0003] Currently, wet toilet paper on the market is generally produced using a dry non-woven fabric process, which has a complex process, low production efficiency and high cost. Summary of the invention

[0004] The purpose of the present invention is to provide a wet toilet wipe substrate and a preparation method thereof. The present invention adopts a wet papermaking method to prepare the wet toilet wipe substrate, which has a simple process and higher production efficiency, can reduce the production cost of the wet toilet wipe substrate, and is suitable for promotion and application.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides a method for preparing a wet toilet wipe substrate, comprising the following steps:

[0007] Decomposing the fiber raw material in water to obtain a decomposing fiber system;

[0008] The debonded fiber system and the auxiliary agent are mixed and papermaking is performed to obtain a wet toilet tissue substrate.

[0009] Preferably, the fiber raw material includes one or more of coniferous pulp, broadleaf pulp, hemp pulp, bamboo pulp, mulberry silk fiber, viscose fiber, tencel fiber and nanocellulose.

[0010] Preferably, the decomposition is carried out under stirring conditions, and the stirring speed is 2900-3100 r / min.

[0011] Preferably, the auxiliary agents include paper wet strengthening agents and softeners.

[0012] Preferably, the papermaking comprises sequentially performing forming on a web, wet pressing, cylinder drying, creping, curling and rewinding.

[0013] Preferably, the web forming concentration is 0.001-0.3wt%.

[0014] Preferably, the wet pressing pressure is 200-400 kPa.

[0015] Preferably, the drying temperature of the drying cylinder is 104-106°C.

[0016] The present invention provides a wet toilet wipe substrate prepared by the preparation method described in the above technical solution.

[0017] Preferably, the single-layer basis weight of the wet toilet tissue substrate is 20 to 40 g / m 2 .

[0018] The present invention provides a method for preparing a wet toilet wipe substrate, comprising the following steps: deflaking a fiber raw material in water to obtain a deflaked fiber system; mixing the deflaked fiber system with an auxiliary agent, and making paper to obtain a wet toilet wipe substrate. The present invention adopts a wet papermaking method to prepare a wet toilet wipe substrate, which has a simple process and higher production efficiency, can reduce the production cost of the wet toilet wipe substrate, and is suitable for promotion and application. Moreover, the wet toilet wipe substrate prepared by the present invention has high strength and softness, is easily dispersed in water, and is degradable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a dispersibility picture of the wet toilet wipe substrate of Example 1;

[0020] Figure 2 This is a picture showing the non-dispersibility of the wet toilet wipe substrate of Comparative Example 1. DETAILED DESCRIPTION

[0021] The present invention provides a method for preparing a wet toilet wipe substrate, comprising the following steps:

[0022] Decomposing the fiber raw material in water to obtain a decomposing fiber system;

[0023] The debonded fiber system and the auxiliary agent are mixed and papermaking is performed to obtain a wet toilet tissue substrate.

[0024] The present invention decomposes the fiber raw material in water to obtain a decompressed fiber system. In the present invention, the fiber raw material preferably includes one or more of conifer pulp, broadleaf pulp, hemp pulp, bamboo pulp, mulberry silk fiber, viscose fiber, tencel fiber and nanocellulose, and more preferably a mixed fiber of conifer pulp and hemp pulp, or a mixed fiber of conifer pulp and broadleaf pulp, or a mixed fiber of conifer pulp and bamboo pulp, or a mixed fiber of conifer pulp, tencel fiber and mulberry silk fiber, or a mixed fiber of conifer pulp, tencel fiber and viscose fiber, or a mixed fiber of conifer pulp and tencel fiber, or a mixed fiber of conifer pulp, tencel fiber and broadleaf pulp, or a mixed fiber of conifer pulp, tencel fiber and nanocellulose. In the present invention, the use of nanocellulose can increase the moisture retention, tensile strength and softness of the finished product.

[0025] In the present invention, the mass content of coniferous pulp in the fiber raw material is preferably 50% or more, more preferably 80-95%.

[0026] In a specific embodiment of the present invention, the mass content of coniferous pulp in the mixed fiber of coniferous pulp and hemp pulp is 95%, and the mass content of hemp pulp is 5%. The mass content of coniferous pulp in the mixed fiber of coniferous pulp and broadleaf pulp is 90%, and the mass content of broadleaf pulp is 10%. The mass content of coniferous pulp in the mixed fiber of coniferous pulp and bamboo pulp is 80%, and the mass content of bamboo pulp is 20%. The mass content of coniferous pulp in the mixed fiber of coniferous pulp, tencel fiber and mulberry silk fiber is 90%, the mass content of tencel fiber is 5%, and the mass content of mulberry silk fiber is 5%. The mass content of coniferous pulp in the mixed fiber of coniferous pulp, tencel fiber and viscose fiber is 80%, the mass content of tencel fiber is 10%, and the mass content of viscose fiber is 10%. The mass content of coniferous pulp in the mixed fiber of coniferous pulp and tencel fiber is 90%, and the mass content of tencel fiber is 10%. The mass content of coniferous pulp in the mixed fiber of coniferous pulp, tencel fiber and broadleaf pulp is 90%, the mass content of tencel fiber is 5% and the mass content of broadleaf pulp is 5%. The mass content of coniferous pulp, tencel fiber and nanocellulose in the mixed fiber of coniferous pulp, tencel fiber and nanocellulose is 90%, the mass content of tencel fiber is 5% and the mass content of nanocellulose is 5%.

[0027] In the present invention, the beating degree of the coniferous pulp is preferably 9°SR~50°SR, more preferably 15°SR~25°SR; the beating degree of the broadleaf pulp is preferably 13°SR~40°SR, more preferably 15°SR~20°SR; the beating degree of the hemp pulp is preferably 9°SR~50°SR, more preferably 15°SR~30°SR; the beating degree of the bamboo pulp is preferably 13°SR~40°SR, more preferably 15°SR~20°SR; the fiber length of the mulberry silk fiber is preferably 3-8mm, more preferably 5-7mm; the fiber length of the viscose fiber is preferably 3-8mm, more preferably 5-7mm; the fiber length of the Tencel fiber (also called Lyocell fiber) is preferably 3-8mm, more preferably 5-7mm; the beating degree of the Tencel fiber is preferably 9°SR~85°SR, more preferably 35°SR~60°SR; the diameter of the nanocellulose is preferably 20-500nm.

[0028] In the present invention, the mass ratio of the fiber raw material to water is preferably 0.01 to 0.3:100, and more preferably 0.1 to 0.15:100.

[0029] In the present invention, the decomposition is preferably carried out under stirring conditions, and the stirring speed is preferably 2900-3100 r / min, more preferably 2995-3005 r / min. In the present invention, the decomposition temperature is preferably 10-50°C, more preferably 20-25°C. In the present invention, the decomposition time is preferably 30 min.

[0030] The present invention de-stresses the fiber raw material so that the fiber can be dispersed in water more evenly to obtain paper with good uniformity.

[0031] After obtaining the debonded fiber system, the present invention mixes the debonded fiber system with an auxiliary agent, performs papermaking, and obtains a wet toilet tissue substrate. In the present invention, the auxiliary agent preferably includes a paper wet strength agent and a softener. In the present invention, the paper wet strength agent preferably includes a polyamide epichlorohydrin resin (PAE); the softener preferably includes an alkyl phosphate ester, an alkyl phosphate salt, an alkyl sulfate ester, an alkyl sulfate salt, an alkyl sulfonate salt, or an organosilicon-modified polyurethane resin.

[0032] In the present invention, the mass of the auxiliary agent is preferably 0.001-0.006% of the mass of the fiber raw material, and more preferably 0.002%.

[0033] In the present invention, the papermaking preferably includes web forming, wet pressing, cylinder drying, corrugating, curling and rewinding performed in sequence. In the present invention, the web concentration of the web forming is preferably 0.001-0.3wt%, more preferably 0.1-0.15wt%. In the present invention, the pressure of the wet pressing is preferably 200-400kPa, more preferably 300kPa. In the present invention, the temperature of the cylinder drying is preferably 104-106°C. In the present invention, the corrugating can adjust the bulk thickness of the paper to achieve a fluffy and soft touch.

[0034] The present invention preferably fixes nanocellulose on the surface of the obtained primary paper after papermaking. In the present invention, the fixing method preferably includes surface impregnation, coating or sizing. In the present invention, the diameter of the nanocellulose is preferably 20 to 500 nm, more preferably 100 to 200 nm; the mass fraction of the nanocellulose in the wet toilet tissue substrate is preferably 5%.

[0035] The present invention also provides a wet toilet wipe substrate prepared by the preparation method described in the above technical solution. In the present invention, the wet toilet wipe substrate is a single layer or a multi-layer composite; the single layer basis weight of the wet toilet wipe substrate is preferably 20 to 40 g / m 2 , more preferably 30 to 33 g / m 2 .

[0036] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. 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.

[0037] Example 1

[0038] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and the mixture was decomposed at 3000r / min for 30min, and then PAE and alkyl phosphate were added to make paper to obtain a wet toilet wipe substrate; the masses of the PAE and alkyl phosphate were 0.002% of the mass of the fiber raw material respectively; the papermaking process was sequentially performed of web forming, wet pressing, and cylinder drying; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0039] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0040] Example 2

[0041] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and after being decomposed at 3000r / min for 30min, PAE was added for papermaking to obtain a wet toilet wipe substrate; the mass of the PAE was 0.002% of the mass of the fiber raw material; the papermaking process was sequentially performed including web forming, wet pressing, cylinder drying, wrinkling, curling and rewinding; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0042] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0043] Example 3

[0044] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and after being decomposed at 3000r / min for 30min, PAE was added for papermaking to obtain a wet toilet wipe substrate; the mass of the PAE was 0.002% of the mass of the fiber raw material; the papermaking process was sequentially performed including web forming, wet pressing, cylinder drying, wrinkling, curling and rewinding; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0045] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0046] Example 4

[0047] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and after being decomposed at 3000r / min for 30min, PAE was added for papermaking to obtain a wet toilet wipe substrate; the mass of the PAE was 0.002% of the mass of the fiber raw material; the papermaking process was sequentially performed including web forming, wet pressing, cylinder drying, wrinkling, curling and rewinding; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0048] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0049] Example 5

[0050] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and after being decomposed at 3000r / min for 30min, PAE was added for papermaking to obtain a wet toilet wipe substrate; the mass of the PAE was 0.002% of the mass of the fiber raw material; the papermaking process was sequentially performed including web forming, wet pressing, cylinder drying, wrinkling, curling and rewinding; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0051] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0052] Example 6

[0053] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and after being decomposed at 3000r / min for 30min, PAE was added for papermaking to obtain a wet toilet wipe substrate; the mass of the PAE was 0.002% of the mass of the fiber raw material; the papermaking process was sequentially performed including web forming, wet pressing, cylinder drying, wrinkling, curling and rewinding; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0054] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0055] Example 7

[0056] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and after being decomposed at 3000r / min for 30min, PAE was added for papermaking to obtain a wet toilet wipe substrate; the mass of the PAE was 0.002% of the mass of the fiber raw material; the papermaking process was sequentially performed including web forming, wet pressing, cylinder drying, wrinkling, curling and rewinding; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0057] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0058] Example 8

[0059] 10g (on an absolute dry basis) of fiber raw material and 2000g of water were mixed, and after being decomposed at 3000r / min for 30min, PAE was added for papermaking to obtain a wet toilet wipe substrate; the mass of the PAE was 0.002% of the mass of the fiber raw material; the papermaking process was sequentially performed including web forming, wet pressing, cylinder drying, wrinkling, curling and rewinding; the web concentration of the web forming was 0.02wt%, the pressure of the wet pressing was 200kPa, and the temperature of the cylinder drying was 105°C.

[0060] The fiber raw materials used in this embodiment are shown in Table 1; the properties of the obtained wet toilet wipe substrate are shown in Table 2.

[0061] Comparative Example 1

[0062] The wet toilet wipe substrate is commercially available and is prepared using a dry non-woven fabric process.

[0063] Table 1 Fiber raw materials of wet toilet tissue substrates of Examples 1 to 8 and Comparative Example 1

[0064]

[0065]

[0066] Table 2 Properties of wet toilet tissue substrates of Examples 1 to 8 and Comparative Example 1

[0067]

[0068] It can be seen from Table 2 that the wet tensile index of the embodiments is higher than that of the comparative examples, meeting the use strength requirements.

[0069] Test Case

[0070] The dispersibility tester was used to conduct a dispersibility test on the wet toilet wipe substrates of Example 1 and Comparative Example 1, and the implementation standard was GB / T20810-2018 "Toilet Paper (including toilet paper base paper)".

[0071] The specific test method is as follows: fill the plum blossom tube with tap water, set the rotor speed to 350r / min, after the vortex in the tube is stable, the height from the water surface to the bottom of the vortex is one-third of the total height of the water surface in the tube, and place the wet toilet wipe substrate perpendicular to the horizontal plane at the center of the vortex in the tube; turn off the motor and stop ventilation after 40s. Pour the wet toilet wipe substrate in the tube into a beaker to observe whether it is dispersed. If one or more pieces of fragments appear, it is judged that the wet toilet wipe substrate is qualified for dispersibility, otherwise it is judged to be unqualified.

[0072] Figure 1 This is a dispersibility picture of the wet toilet tissue substrate of Example 1. Figure 2 This is a picture of the non-dispersibility of the wet toilet wipe substrate of Comparative Example 1.

[0073] The wet toilet tissue substrate prepared by the present invention has high strength and softness, is easily dispersed in water, and is degradable.

[0074] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for preparing a wet toilet wipe substrate, comprising the following steps: Decomposing the fiber raw material in water to obtain a decompressed fiber system; The debonded fiber system and the auxiliary agent are mixed and paper-made to obtain a wet toilet tissue substrate; The fiber raw material is any one of the following combinations: 95wt% conifer pulp + 5wt% hemp pulp; 80wt% conifer pulp + 20wt% bamboo pulp; 90wt% conifer pulp + 5wt% Tencel fiber + 5wt% mulberry silk fiber; 80wt% conifer pulp + 10wt% tencel fiber + 10wt% viscose fiber; 90wt% conifer pulp + 10wt% Tencel fiber; 90wt% conifer pulp + 5wt% tencel fiber + 5wt% broadleaf pulp; 90wt% conifer pulp + 5wt% Tencel fiber + 5wt% nanocellulose; The fiber length of the mulberry silk fiber is 3 to 8 mm; the fiber length of the viscose fiber is 3 to 8 mm; the fiber length of the tencel fiber is 3 to 8 mm; the diameter of the nanocellulose is 20 to 500 nm; The beating degree of the conifer pulp is 15-25°SR; the beating degree of the broadleaf pulp is 15-20°SR; the beating degree of the hemp pulp is 9-50°SR; the beating degree of the bamboo pulp is 13-40°SR; the beating degree of the tencel fiber is 9-85°SR; The auxiliary agents include paper wet strengthening agents and softeners; The paper wet strengthening agent is polyamide epichlorohydrin resin; The mass of the auxiliary agent is 0.001-0.006% of the mass of the fiber raw material; The papermaking comprises sequentially forming on the screen, wet pressing, drying by a drying cylinder, wrinkling, curling and rewinding; The web concentration of the web forming is 0.001-0.1wt%; the pressure of the wet pressing is 200-400kPa; and the drying temperature of the drying cylinder is 104-106°C.

2. The preparation method according to claim 1, characterized in that: The decomposition is carried out under stirring conditions, and the stirring speed is 2900-3100 r / min.

3. A wet toilet wipe substrate prepared by the preparation method according to any one of claims 1 to 2.

4. The wet toilet wipe substrate according to claim 3, characterized in that: The single-layer basis weight of the wet toilet tissue substrate is 20 to 40 g / m 2 .

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