CN103603199B - A kind of nonwoven fabric for the manufacture of dust-free cleaning paper and manufacture method thereof - Google Patents

Abstract

The invention provides a non-woven fabric for making dust-free wiping paper, comprising a non-woven fabric containing cellulose fibers, and the non-woven fabric is treated with polyvinyl alcohol, water-based polyacrylate, and water-based isocyanate crosslinking agent solution processed. The non-woven fabric provided by the invention is firm, high in cleanliness and soft. The present invention also provides a method for manufacturing the non-woven fabric, comprising configuring a treatment solution comprising polyvinyl alcohol, water-based polyacrylate and a water-based isocyanate crosslinking agent; using the treatment solution to perform padding treatment on the non-woven fabric containing cellulose fibers; Then bake. The method of the invention is simple and low in cost.

Description

A kind of non-woven fabric for making dust-free wiping paper and its manufacturing method

technical field

The present invention relates to a nonwoven fabric and a manufacturing method thereof, in particular to a nonwoven fabric for making dust-free wiping paper and a manufacturing method thereof.

Background technique

Non-woven fabric is a kind of non-woven fabric, which is formed by directly using polymer chips, short fibers or filaments to form fibers through airflow or mechanically, and then strengthened by hydroentanglement, needle punching or hot rolling, and finally finished. non-woven fabric. Non-woven fabric is a new type of fiber product with soft, breathable and planar structure. It is widely used because it is environmentally friendly and easy to degrade (if it is placed outdoors and decomposed naturally, its longest life is only 90 days), it is widely used as wiping paper. use. The materials of non-woven fabrics include polyester, polypropylene, nylon, spandex, and acrylic. Most of these materials have poor hydrophilicity. The wiping paper is usually made of non-woven fabric bonded by spunlace of cellulose staple fiber and polyester staple fiber to improve its hydrophilicity and water absorption performance.

Although cellulose staple fibers are used in non-woven fabrics, their hydrophilic properties are greatly improved, but the amount of dust generated is greatly increased. The wiping paper made of this non-woven fabric is easy to drop dust and contaminate the wiped objects during the wiping process. , not suitable for clean room environments.

At present, there is no report on the literature on the treatment of non-woven fabrics to improve the cleaning performance. The present invention proposes for the first time to process the non-woven fabric to improve its cleanliness.

Contents of the invention

The present invention aims at the cellulose staple fiber non-woven fabrics (viscose fiber, wood pulp fiber, cotton fiber and cupro ammonia fiber, with a component content of more than 70%) used in the domestic production of wiping paper, which have a large amount of dust and cannot be used for cleaning. The invention provides a non-woven fabric suitable for a clean room with a small amount of dust shed, a low ion content, and a low non-volatile organic content, and a manufacturing method thereof.

The present invention adopts the following technical solutions to solve the above technical problems.

A non-woven fabric for making dust-free wiping paper, comprising a non-woven fabric containing cellulose fibers, the non-woven fabric is treated with a treatment solution containing polyvinyl alcohol, aqueous polyacrylate, and aqueous isocyanate crosslinking agent. become.

The degree of polymerization of the polyvinyl alcohol is 1700-1750, and the degree of alcoholysis is 96%-98%.

The water-based polyacrylate is water-soluble polyacrylate.

The polyacrylate refers to a polymer of acrylate.

The polyacrylate is formed by polymerizing butyl acrylate, hydroxyethyl acrylate, allyl polyoxyethylene ether, methyl methacrylate and methacrylic acid.

The polyacrylate is first polymerized with methyl methacrylate, methacrylic acid, and initiator at 80-85°C, and then added butyl acrylate, hydroxyethyl acrylate, allyl polyoxyethylene ether, and initiator to Polymerization at 80~85℃.

The polyacrylate is first emulsified with methyl methacrylate and methacrylic acid to obtain a pre-emulsion A; emulsified butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether to obtain a pre-emulsion B; then in the pre-emulsion Introduce initiator into emulsion A, polymerize at 80~85℃, then add pre-emulsion B and initiator to continue polymerization at 80~85℃.

The polyvinyl alcohol (PVA) in the treatment solution accounts for 0.2%-2% of the total mass of the treatment solution, preferably 0.4%-1%.

The aqueous polyacrylate (PA) in the treatment solution accounts for 0.3%-3% of the total mass of the treatment solution, preferably 0.6%-2%. The mass of the aqueous isocyanate crosslinking agent in the treatment solution is 1% to 10% of the total mass of polyvinyl alcohol and aqueous polyacrylate, preferably 3%.

The present invention also provides a method for manufacturing non-woven fabrics for dust-free wiping paper, including the following steps: (1) configuring a treatment solution: adding polyvinyl alcohol, water-based polyacrylate and water-based isocyanate cross-linking agent into water to form a Treatment solution; (2) treatment: use the above treatment solution to carry out padding treatment to the non-woven fabric containing cellulose fiber, and the excess rate is 180%; (3) drying: put the non-woven fabric of step (2) at 120 Bake at ~180°C for 30-300s.

The polyvinyl alcohol in the step (1) accounts for 0.2%-2% of the total mass of the treatment solution, preferably 0.4%-1%.

The water-based polyacrylate in the step (1) accounts for 0.3%-3% of the total mass of the treatment solution, preferably 0.6%-2%.

The mass of the water-based isocyanate crosslinking agent in the step (1) is 1-10% of the total amount of polyvinyl alcohol and water-based polyacrylate, preferably 3%.

The degree of polymerization of polyvinyl alcohol in the step (1) is 1700-1750, and the degree of alcoholysis is 96%-98%.

The water-based polyacrylate in the step (1) is a water-soluble polyacrylate.

The polyacrylate in the step (1) is an acrylate polymer.

The polyacrylate in the step (1) is formed by polymerizing butyl acrylate, hydroxyethyl acrylate, allyl polyoxyethylene ether, methyl methacrylate and methacrylic acid.

The polyacrylate in the step (1) is first to polymerize methyl methacrylate, methacrylic acid and initiator at 80-85°C, and then add butyl acrylate, hydroxyethyl acrylate, allyl polyoxyethylene Ether and initiator polymerize at 80~85°C.

The water-based polyacrylate in the step (1) is obtained by first emulsifying methyl methacrylate and methacrylic acid to obtain pre-emulsion A; emulsifying butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether to obtain Pre-emulsion B; then add initiator to pre-emulsion A, polymerize at 80~85℃, then add pre-emulsion B and initiator to continue polymerization at 80~85℃.

The water-based polyacrylate in the step (1) is synthesized by the following steps: (1) adding 0.05%~1% OP-10 into a certain volume of deionized water and stirring, and adding 2~30% methyl methacrylate dropwise ester, 1%~5% methacrylic acid, stir vigorously and slowly add deionized water to obtain pre-emulsion A; (2) Add 0.05%~1% OP-10 to a certain volume of deionized water and stir, then add 10% OP-10 dropwise ~30% butyl acrylate, 1%~5% hydroxyethyl acrylate, 10%~50% allyl polyoxyethylene ether, stir vigorously and slowly add deionized water to obtain pre-emulsion B; (3) pre-emulsion Add A and stir in a four-neck flask, adjust the pH to 6.5~7.5 with ammonia water, directly raise the temperature to 80-85°C, and add 0.3% ammonium persulfate, keep at this temperature, add pre-emulsion B dropwise, drop after the addition is completed Add 0.7% ammonium persulfate, keep warm for 2~3 hours; (4) test the pH of the reaction solution every 20 minutes during the reaction process, adjust the pH to 6.5~7.5 with ammonia water, and obtain a white emulsion after the reaction is completed; (5) adjust the pH to 8 with ammonia water ~9, high-speed stirring and puffing for 1 hour, then under stirring, add polyethylene glycol 400 and glycerol (polyethylene glycol 400: glycerol = 1:1) dropwise according to 40g alcohol/100g emulsion, and stir until the solution is Transparent liquid with blue light, resulting in water-based polyacrylate.

The total mass of water added in step (1) and step (2): the total mass of methyl methacrylate, methacrylic acid, butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether=7:3.

First, the present invention uses a treatment solution compounded by polyvinyl alcohol, water-based polyacrylate and water-based isocyanate crosslinking agent to treat the non-woven fabric containing cellulose fibers. On the one hand, because polyvinyl alcohol and water-based polyisocyanate are cross-linked to form cross-linked polymer I, water-based polyacrylate and water-based polyisocyanate are cross-linked to form cross-linked polymer II, and the networks of polymer I and polymer II are interpenetrated to form interpenetrating Network polymer, because the interpenetrating network polymer is formed by the continuous interpenetration of at least two cross-linked polymer networks obtained by cross-linking each other, that is, forming a cross-linked and interpenetrating network, so it is relatively simple to use polyacrylate Or polyvinyl alcohol, which has a better effect on the cleanliness of non-woven fabrics after treatment. On the other hand, because part of the water-based isocyanate in the interpenetrating network polymer reacts with part of the hydroxyl groups of the cellulose fibers, the interpenetrating network polymer is firmly combined on the non-woven fabric, which can effectively increase the interpenetrating network polymer. Fastness, reducing its dust generation (LPC), ion content, and does not increase the content of non-volatile organic compounds (NVR). Therefore, the polyvinyl alcohol in the treatment liquid, the water-based polyacrylate, the water-based isocyanate crosslinking agent, and the cellulose fibers on the non-woven fabric react and interact with each other, giving the non-woven fabric a good cleaning performance. Furthermore, the allyl polyoxyethylene ether monomer is used in the synthesis of the water-based polyacrylate of the present invention, which greatly improves the softness of the nonwoven fabric.

In a word, the non-woven fabric of the present invention is soft, has a high degree of cleanliness, and has a relatively simple manufacturing method and is easy to realize industrialization.

Detailed ways

Test indicators and their test methods.

The test method of LPC (Liquid particle counts) refers to the uniaxial shaker test method in Chapter 6 of IEST-RP-CC004.3. The paper is placed on a single-axis shaker and shaken at a speed of 150rpm for 5min, and then tested with a liquid particle counter.

The test method of ion content is as follows: place a piece of wipe paper in a beaker containing 200ml of deionized water, soak for one hour, and shake the beaker intermittently. Use clean tweezers to take out the test sample and detect it with an ion chromatography instrument.

The NVR test method is as follows: take a piece of wiping paper and place it in a beaker containing 100ml of isopropanol, soak it for 24 hours, and shake the beaker intermittently. Use a measuring cylinder to transfer 50ml of the sample solution to the aluminum plate several times, and add it each time when the sample solution in the aluminum plate evaporates to a little. Be careful not to boil when evaporating. Use the same solvent to wash the measuring cylinder 3 times, a total of 10ml, and rinse three times. The liquid was poured into the aluminum pan. Continue heating until all solvent has evaporated and place the aluminum pan in a desiccator for at least 1 hour and reweigh the aluminum pan to the nearest 0.0001 g. Record the weight as the final weight of the sample, and the aluminum pan blank.

The softness test method is as follows: select 10 people of different ages and genders, twist the dust-free wipes with their hands, and rank the softness properties of all samples according to the touch.

The water-based polyacrylate of the present invention refers to a water-soluble polyacrylate, and the synthesis method of the water-based polyacrylate is as follows: (1) Add 0.5% OP-10 into 10ml deionized water and stir, and add 30% methyl methacrylate dropwise ester, 2% methacrylic acid, stirred vigorously and slowly added 60ml deionized water to obtain pre-emulsion A. (2) Add 1% OP-10 to 10ml of deionized water and stir, then dropwise add 18.3% butyl acrylate, 3% hydroxyethyl acrylate, 46.7% allyl polyoxyethylene ether, stir vigorously and slowly add 60ml to Ionized water to obtain pre-emulsion B. (3) Add the pre-emulsion A to the four-necked bottle and stir, adjust the pH to 7 with ammonia water, raise the temperature to 85°C, and add 0.3% ammonium persulfate, keep at this temperature, add the pre-emulsion B dropwise, after the addition is completed Add 0.7% ammonium persulfate dropwise, and keep warm for 3 hours. (4) During the reaction process, test the pH of the reaction solution every 20 minutes, adjust the pH to 7 with ammonia water, and obtain a white emulsion after the reaction is completed. (5) Use ammonia water to adjust the pH to 8, stir and puff at high speed for 1 hour, then add polyethylene glycol 400 and glycerol (1:1) dropwise at the rate of 40g alcohol/100g emulsion under stirring, and stir until the solution is half blue. Transparent liquid, water-based polyacrylate WPEA-1 was obtained.

The total mass of deionized water added in step (1) and step (2): the total mass of methyl methacrylate, methacrylic acid, butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether is 7: 3.

The percentages of all substances in the steps are based on the total mass of methyl methacrylate, methacrylic acid, butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether, such as 0.05% OP-10 The amount of OP-10 added is not 0.05% of the total mass of methyl methacrylate, methacrylic acid, butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether.

OP-10 in step (1) can be 0.05%~1%, methyl methacrylate can be 2~30%, methacrylic acid can be 1%~3%; OP-10 in step (2) can be 0.05%~1%, butyl acrylate can be 10%~30%, hydroxyethyl acrylate can be 1%~5%, allyl polyoxyethylene ether can be 10%~50%; step (3) The reaction temperature can be 80-85° C., and the reaction time can be 2-3 hours; the pH value of step (4) can be 6.5-7.5; the pH value of step (5) can be 8-9.

The comparative synthesis method of polyacrylate is as follows: (1) Add 0.5% OP-10 to 10ml deionized water and stir, then add 20% methyl methacrylate and 3% methacrylic acid dropwise, stir vigorously and slowly add 60ml deionized water water to obtain pre-emulsion A. (2) Add 1% OP-10 to 10ml deionized water and stir, then add 15% butyl acrylate and 2% hydroxyethyl acrylate dropwise, stir vigorously and slowly add 60ml deionized water to obtain pre-emulsion B. (3) Add the pre-emulsion A into the four-necked bottle and stir, adjust the pH to 7 with ammonia water, raise the temperature to 85°C, and add 0.3% ammonium persulfate, keep at this temperature, add the pre-emulsion B dropwise, after the addition is completed Add 0.7% ammonium persulfate dropwise, and keep warm for 3 hours. (4) During the reaction process, test the pH of the reaction solution every 20 minutes, adjust the pH to 7 with ammonia water, and obtain a white emulsion after the reaction is completed. (5) Use ammonia water to adjust the pH to 8, stir and puff at high speed for 1 hour, then add polyethylene glycol 400 and glycerol (1:1) dropwise at the rate of 40g alcohol/100g emulsion under stirring, and stir until the solution is half blue. Transparent liquid, water-based polyacrylate WPEA-2 was obtained.

The percentages of all substances in the steps are based on the total mass of methyl methacrylate, methacrylic acid, butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether, such as 0.05% OP-10 The amount of OP-10 added is not 0.05% of the total mass of methyl methacrylate, methacrylic acid, butyl acrylate, hydroxyethyl acrylate and allyl polyoxyethylene ether.

Example 1: The treatment steps of non-woven fabrics are as follows: (1) Configure the treatment solution: dissolve polyvinyl alcohol with a degree of polymerization of 1700 and an alcoholysis degree of 97% in boiling water for 1 hour, and then add the above-mentioned synthesized water-based polyacrylic acid respectively Ester WPEA-1, water-based polyisocyanate crosslinking agent, stir vigorously until mixed evenly; among them, polyvinyl alcohol (PVA) accounts for 0.4% of the total mass of the solution, polyacrylate (PA) accounts for 0.6% of the total mass of the solution, and water-based polyisocyanate The cross-linking agent accounts for 0.03% of the total mass of the solution. (2) Treatment: In this embodiment, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/ ^m2 ; the non-woven fabric is soaked with the treatment solution in step (1) Rolling once, the excess rolling rate is 180%. (3) Drying: Dry the non-woven fabric of step (2) in a drying machine at 180° C. for 1 min to obtain Sample 1.

Comparative Example 1: A non-woven fabric combined with 70% viscose fiber and 30% polyester fiber, with a grammage of 30g/m ² , designated as sample 1A.

Comparative Example 2: The treatment steps of non-woven fabrics are as follows: (1) Configure the treatment solution: add the blocked water-based polyisocyanate crosslinking agent polymer into the aqueous solution to dissolve and dilute, and stir vigorously until the mixture is uniform; the isocyanate crosslinking agent accounts for the total amount of the solution. 1% of mass. (2) Treatment: In this embodiment, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/ ^m2 ; the non-woven fabric is soaked with the treatment solution in step (1) Rolling once, the excess rolling rate is 180%. (3) Drying: Dry the nonwoven fabric in step (2) at 180° C. for 1 min in a drying machine to obtain sample 1B.

Comparative Example 3: Treat the non-woven fabric separately with 1% polyvinyl alcohol, the treatment steps of the non-woven fabric are as follows: (1) configure the treatment solution: add polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 98% into boiling water In the aqueous solution for 1 hour, stir vigorously until completely dissolved; polyvinyl alcohol (PVA) accounts for 1% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out once, and the excess rate is 180%. (3) Drying: Dry the non-woven fabric in step (2) at 180° C. for 1 min in a drying machine to obtain sample 1C.

Comparative example 4: use 1% water-based polyacrylate to treat the non-woven fabric alone, the treatment steps of the non-woven fabric are as follows: (1) Prepare the treatment solution: add the water-based polyacrylate A into the aqueous solution, and stir vigorously for 1 hour until it is completely dissolved; Waterborne polyacrylate accounted for 1% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out, and the excess rate is 180%. (3) Drying: Dry the nonwoven fabric in step (2) at 180° C. for 1 min in a drying machine to obtain sample 1D.

Comparative Example 5: The treatment steps of non-woven fabrics are as follows: (1) Configure the treatment solution: dissolve polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 98% in boiling water for 1 hour, and then add the above-mentioned synthesized water-based Polyacrylate A, stir vigorously until uniformly mixed; among them, polyvinyl alcohol (PVA) accounts for 0.4% of the total mass of the solution, and polyacrylate (PA) accounts for 0.6% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out once, and the excess rate is 180%. (3) Drying: Dry the nonwoven fabric in step (2) in a drying machine at 180° C. for 1 min to obtain sample 1E.

Comparative Example 6: The treatment steps of non-woven fabrics are as follows: (1) Configure the treatment solution: dissolve polyvinyl alcohol with a degree of polymerization of 1700 and a degree of alcoholysis of 98% in boiling water for 1 hour, and then add the above-mentioned synthesized aqueous Polyacrylate WPEA-2, water-based polyisocyanate crosslinking agent, stir vigorously until mixed evenly; among them, polyvinyl alcohol (PVA) accounts for 0.4% of the total mass of the solution, polyacrylate (PA) accounts for 0.6% of the total mass of the solution, water-based The polyisocyanate crosslinking agent accounts for 0.03% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out once, and the excess rate is 180%. (3) Drying: Dry the non-woven fabric in step (2) in a drying machine at 180°C for 1 min to obtain sample 1F.

Example 2: The treatment steps of non-woven fabrics are as follows: (1) Prepare the treatment solution: dissolve polyvinyl alcohol with a degree of polymerization of 1750 and an alcoholysis degree of 98% in boiling water for 1 hour, and then add water-based polyacrylate WPEA-1 , water-based polyisocyanate cross-linking agent, stir vigorously until mixed evenly; wherein polyvinyl alcohol (PVA) accounts for 0.2% of the total mass of the solution, water-based polyacrylate (PA) accounts for 2% of the total mass of the solution, water-based polyisocyanate cross-linking agent Accounting for 0.022% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out once, and the excess rate is 180%. (3) Drying: Dry the non-woven fabric in step (2) at 120° C. for 5 minutes in a drying machine to obtain sample 2.

Example 3: The treatment steps of non-woven fabrics are as follows: (1) Configure the treatment liquid: add polyvinyl alcohol with a degree of polymerization of 1750 and an alcoholysis degree of 98% into boiling water for 1 hour, and then add water-based polyacrylate WPEA-1 , water-based polyisocyanate cross-linking agent, stir vigorously until mixed evenly; among them, polyvinyl alcohol (PVA) accounts for 1% of the total mass of the solution, polyacrylate (PA) accounts for 3% of the total mass of the solution, and water-based polyisocyanate cross-linking agent accounts for 1% of the total mass of the solution. 0.4% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out once, and the excess rate is 180%. (3) Drying: Dry the nonwoven fabric in step (2) at 140° C. for 3 minutes in a drying machine to obtain sample 3.

Example 4: The treatment steps of non-woven fabrics are as follows: (1) Configure the treatment solution: add polyvinyl alcohol with a degree of polymerization of 1750 and a degree of alcoholysis of 98% into boiling water for 1 hour, and then add water-based polyacrylate WPEA-1 , water-based polyisocyanate cross-linking agent, stir vigorously until mixed evenly; among them, polyvinyl alcohol (PVA) accounts for 2% of the total mass of the solution, polyacrylate (PA) accounts for 0.3% of the total mass of the solution, and water-based polyisocyanate cross-linking agent accounts for 2% of the total mass of the solution. 0.115% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out once, and the excess rate is 180%. (3) Drying: Dry the nonwoven fabric in step (2) at 160° C. for 30 seconds in a drying machine to obtain sample 4.

Example 5: The treatment steps of non-woven fabrics are as follows: (1) Configure the treatment solution: add polyvinyl alcohol with a degree of polymerization of 1750 and a degree of alcoholysis of 98% into boiling water for 1 hour, and then add water-based polyacrylate WPEA-1 , water-based polyisocyanate cross-linking agent, stir vigorously until mixed evenly; among them, polyvinyl alcohol (PVA) accounts for 1% of the total mass of the solution, polyacrylate (PA) accounts for 0.6% of the total mass of the solution, and water-based polyisocyanate cross-linking agent accounts for 1% of the total mass of the solution. 0.048% of the total mass of the solution. (2) Treatment: In this example, a non-woven fabric combined with 70% viscose fiber and 30% polyester fiber is selected, and the grammage of the non-woven fabric is 30g/m ² ; put the non-woven fabric into the treatment solution in step (1) Padding treatment is carried out once, and the excess rate is 180%. (3) Drying: Dry the nonwoven fabric in step (2) at 180° C. for 1 min in a drying machine to obtain sample 5.

The prepared sample was cut into 9cm×9cm wiping paper and tested. The test results are shown in Table 1.

Table 1 The cleanliness test results of the samples.

Sort of softness: 1A>1D>2>1>1E>3>5>1F>4>1C>1B.

It can be seen from the data in the table that the non-woven fabric treated with polyvinyl alcohol, water-based polyacrylate and water-based isocyanate crosslinking agent has a high degree of cleanliness. This may be due to the cross-linking of polyvinyl alcohol and water-based polyisocyanate to form a cross-linked polymer and the cross-linking of water-based polyacrylate and water-based polyisocyanate to form a cross-linked polymer to form an interpenetrating network structure, which is relatively non-interpenetrating network structure. In terms of materials, it can effectively reduce the amount of dust generated by the wiping paper, reduce the total amount of ions, and at the same time not increase the NVR content, and the interpenetrating network polymer can react with the active groups on the cellulose fiber, which has strong viscosity and is not easy to remove. fall off. In addition, as the addition of polyvinyl alcohol in the treatment liquid increases, the amount of isopropanol absorbed can be significantly reduced, thereby saving the amount of solvent used in the use of the dust-free wiping paper.

Furthermore, it is not difficult to see that the flexibility of the water-based polyacrylate of the present invention is improved due to the introduction of allyl polyoxyethylene ether.

Claims (8)

1. A non-woven fabric for making dust-free wiping paper, characterized in that it comprises a non-woven fabric containing cellulose fibers, and the non-woven fabric is crosslinked by containing polyvinyl alcohol, water-based polyacrylate, water-based isocyanate The polyacrylic acid ester is formed by polymerizing butyl acrylate, hydroxyethyl acrylate, allyl polyoxyethylene ether, methyl methacrylate and methacrylic acid. 2. The non-woven fabric for making dust-free wiping paper according to claim 1, characterized in that, the degree of polymerization of polyvinyl alcohol is 1700-1750, and the degree of alcoholysis is 96%-98%. 3. The non-woven fabric for making dust-free wiping paper according to claim 1, characterized in that, the polyacrylate is firstly mixed with methyl methacrylate, methacrylic acid, and an initiator at 80-85° C. Polymerize, then add butyl acrylate, hydroxyethyl acrylate, allyl polyoxyethylene ether, and initiator to polymerize at 80-85°C. 4. The non-woven fabric for making dust-free wiping paper according to any one of claims 1-3, characterized in that the polyvinyl alcohol in the treatment solution accounts for 0.2%-2% of the total mass of the treatment solution. 5. The non-woven fabric for making dust-free wiping paper according to any one of claims 1 to 3, wherein the water-based polyacrylate in the treatment solution accounts for 0.3% to 3% of the total mass of the treatment solution . 6. The non-woven fabric for making dust-free wiping paper according to any one of claims 1 to 3, wherein the quality of the water-based isocyanate crosslinking agent in the treatment solution is the total of polyvinyl alcohol and water-based polyacrylate. 1% to 10% of the mass. 7. The method for manufacturing a nonwoven fabric according to any one of claims 1 to 6, characterized in that it comprises the following steps: (1) Configure the treatment solution: add polyvinyl alcohol, water-based polyacrylate and water-based isocyanate crosslinking agent into water to form a treatment solution; (2) treatment: adopt above-mentioned treatment solution to carry out padding treatment to the non-woven fabric containing cellulose fiber, and the excess rate is 180%; (3) Drying: Bake the non-woven fabric in step (2) at 120-180°C for 30-300s. 8. according to the manufacture method of the non-woven fabric of claim 7, it is characterized in that, the polyacrylate in described step (1) is butyl acrylate, hydroxyethyl acrylate, allyl polyoxyethylene ether, methacrylic acid Polymer of methyl ester, methacrylic acid.