CN110042671A - A kind of preparation method of the non-woven cloth with heat-accumulation temperature-adjustment and antibacterial functions - Google Patents

Abstract

The invention discloses a kind of preparation methods of non-woven cloth with heat-accumulation temperature-adjustment and antibacterial functions, belong to Tensile properties field.The present invention uses suspension polymerization, using technical grade n-dodecanol as core material, phase-change microcapsule is prepared by wall material of polymethyl methacrylate, then aqueous polyurethane, distilled water, surfactant, phase-change microcapsule, polyhexamethylene list guanidine hydrochloride are mixed in a certain ratio, it stirs evenly and finishing fluid is made, finishing fluid is coated on spun-bonded/melt-blown composite nonwoven fabric using dry coating technique, certain time is baked and obtains the spun-bonded/melt-blown composite nonwoven fabric with heat-accumulation temperature-adjustment and antibacterial functions.Cost of material of the present invention is lower, preparation process is relatively easy and pollution is small, is easy to industrializing implementation, and gained non-woven cloth has good heat-accumulation temperature-adjustment and antibacterial effect, is expected to be used widely in medicine and hygiene fields.

Description

A kind of preparation method of non-woven fabric with heat storage temperature and antibacterial function

technical field

The invention relates to the field of medical textile materials, in particular to a preparation method of a non-woven fabric with heat storage and temperature adjustment and antibacterial functions.

Background technique

Spunbond/meltblown composite nonwovens are spunbond and meltblown composite (spunbond, meltblown can be one or more layers) product. Compared with other non-woven products of the same gram weight, the bonded non-woven fabric has high strength and similar vertical and horizontal properties, but its web-forming uniformity and surface coverage are poor. The melt-blown non-woven fabric has an ultra-fine fiber structure with small fiber diameter, large specific surface area, small porosity, low filtration resistance, high filtration efficiency, good surface coverage and shielding performance, but its disadvantage is strength. Low, poor wear resistance. The spunbond/meltblown composite non-woven fabric formed by combining the two just makes up for each other's weaknesses. It has the advantages of high strength, good wear resistance, breathable comfort, no binder, and non-toxic environmental protection. It is widely used. In the medical and health field, such as surgical gowns, surgical caps, protective clothing, bedspreads, pillowcases, mattresses and patient clothing, etc.

Due to the high temperature in summer, the patient feels stuffy when wearing patient clothes or touching bed covers, pillowcases, etc. for a long time, and the air in the ward is poor, which is easy to breed bacteria; while the weather is cold in winter, the body temperature is lower, and there is less ventilation in winter, indoor air Flow is also poor. There are also special environments such as operating rooms that not only require sterility, but also have a low temperature. Staying in it for a long time can easily lead to discomfort or even accidents. Therefore, the market has put forward higher requirements for heat storage, temperature regulation and antibacterial properties of spunbond/meltblown composite nonwovens.

Phase change microcapsules are coated with phase change materials through microcapsule technology, which can absorb, store and release heat in the form of latent heat. Effect. Combining the phase change microcapsules with the non-woven fabric can make the non-woven fabric respond and adjust to the external temperature, form a stable temperature environment in the closed space in contact with the skin, and achieve the effect of heat storage and temperature regulation, which can not only improve doctors' and The wearing comfort of the patient has a calming effect on the patient's emotions, and can reduce the use of air conditioners, which is beneficial to environmental protection. At present, more research is to use long-chain alkanes as the core material of phase change microcapsules to prepare heat storage and temperature-adjusting fibers. Long-chain alkanes are expensive, and adding phase change microcapsules during spinning may cause microcapsules to suffer. The problem of extrusion and rupture, if the microcapsules rupture a lot, on the one hand, the heat storage and temperature adjustment fiber will lose the function of heat storage and temperature adjustment, and on the other hand, the phase change material overflowing after the microcapsule ruptures will be liquid at room temperature, resulting in fibers It is entangled with fibers, which brings difficulties to production.

In order to improve the antibacterial properties of non-woven fabrics, a common method is to add inorganic nanoparticles with antibacterial effect in or on the surface of non-woven fabrics. However, in the actual use process, the inorganic particles are easy to fall off the surface of the non-woven fabric or lose from the inside, resulting in the loss of antibacterial activity in a short period of time, the antibacterial performance of the non-woven fabric is reduced, and the antibacterial agents containing copper, silver, etc. With color or easy oxidative discoloration, affecting the appearance of the product. In addition, antibacterial nonwovens can also be obtained by immobilizing small-molecule antibacterial agents such as antibiotics and quaternary ammonium compounds on the surface of the nonwoven fabric, but the movement of small molecules on the surface of the fabric is limited, and the fixed amount is small and the activity is not high enough, resulting in poor antibacterial properties. will be affected.

SUMMARY OF THE INVENTION

The invention provides a preparation method of a non-woven fabric with heat storage temperature adjustment temperature and antibacterial function. The phase change microcapsules and the antibacterial agent polyhexamethyleneguanidine hydrochloride are coated on the spunbond/ The surface of the melt-blown composite non-woven fabric is obtained, and the medical spunbond/melt-blown composite non-woven fabric with heat storage temperature and antibacterial effect is obtained.

The technical scheme that realizes the present invention is:

A preparation method of a non-woven fabric with heat storage temperature adjustment temperature and antibacterial function, comprising the following steps:

(1) Preparation of phase change microcapsules

Slowly add a certain proportion of n-dodecanol, emulsifier and cross-linking agent to 100 ml of water, adjust the temperature to 50 °C, and stir at 800-1000 rpm for 10-15 min to obtain an emulsion; then add it to the emulsion Methyl methacrylate and azobisisobutyronitrile were stirred for 20-30 min, and then the temperature was kept at 80-90 °C and stirred for 5-7 h. The reaction product was filtered, washed with absolute ethanol, and dried in vacuum for 24 h. phase change microcapsules are obtained;

(2) Preparation of coating finishing solution

After mixing and stirring water-based polyurethane, surfactant, phase change microcapsules, antibacterial agent and distilled water evenly in proportion, it is configured into a coating finishing liquid;

(3) Preparation of functionalized spunbond/meltblown composite nonwovens

The finishing solution is coated on the spunbond/meltblown composite non-woven fabric by a dry coating process, and after baking, washing and drying, a spunbond/meltblown composite nonwoven fabric with heat storage temperature adjustment temperature and antibacterial functions is obtained.

In the step (1), n-dodecanol is the core material, methyl methacrylate is the wall material, and the quality of n-dodecanol, emulsifier, cross-linking agent, methyl methacrylate and azobisisobutyronitrile is The ratio is (1-5):(0.1-0.2):(0.1-0.3):(1-2):(0.05-0.1).

In the step (1), the emulsifier is one of styrene maleic anhydride copolymer sodium salt or sodium lauryl sulfate or a mixture thereof; the cross-linking agent is one of pentaerythritol triacrylate or pentaerythritol tetraacrylate. species or mixtures thereof.

In the step (2), the surfactant is one of fatty alcohol polyoxyethylene ether or sodium lauryl sulfate or a mixture thereof; the antibacterial agent is polyhexamethyleneguanidine hydrochloride, and the relative molecular mass is 2000 -8000.

In the step (2), the solid content of the water-based polyurethane is 35-40%, the pH is 6-9, the shear strength is 180-220 MPa, and the elongation is 1000-1200%.

In the step (2), the mass ratio of water-based polyurethane, surfactant, phase-change microcapsules, antibacterial agent, and distilled water is (20-50): (1-5): (10-30): (5-20) : (10-45).

In the step (3), the baking temperature is 60-80° C., and the baking time is 20-30 min.

In the step (3), the spunbond/meltblown composite non-woven fabric is one or more of polypropylene or polyester, selected from at least one of SMS, SMMS, SMMMS, SMMSS, SSMMSS, and the gram weight is 30-100g/m ² .

The beneficial effects of the present invention are:

(1) The phase change microcapsule core material provided by the present invention is low in price, high in latent heat of phase transition (210.7 J/g), suitable for phase transition temperature (24°C), does not contain or generate formaldehyde in the preparation process, is non-toxic and non-toxic. It is especially suitable for non-woven fabrics for medical and hygiene purposes.

(2) The antibacterial agent polyhexamethyleneguanidine hydrochloride used in the present invention has low cost, long bactericidal and bacteriostatic effect, low toxicity, safe use, and is degradable. It is a high-efficiency broad-spectrum antibacterial agent, and has The higher molecular weight polyhexamethyleneguanidine hydrochloride used in the invention can avoid problems such as leakage or low antibacterial activity.

(3) Compared with adding phase change microcapsules or antibacterial agents in the spinning process, the coating process method provided by the present invention is simple, easy to operate, does not use organic solvents, and is more environmentally friendly, and the obtained spunbond/meltblown composite nonwoven The cloth has the functions of heat storage, temperature adjustment and antibacterial, which can meet the medical requirements and has high market application value.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the cross-sectional structure of the nonwoven fabric of the present invention.

Among them, 1-spunbond/meltblown composite non-woven fabric; 2-n-dodecanol phase change microcapsules; 3-antibacterial agent polyhexamethyleneguanidine hydrochloride.

Detailed ways

The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1

A preparation method of a non-woven fabric with heat storage and temperature adjustment and antibacterial function, the steps are as follows:

First preparation of n-dodecanol phase change microcapsules

Slowly add 5 parts of n-dodecanol, 0.15 part of sodium dodecyl sulfate and 0.25 part of pentaerythritol tetraacrylate to 100 ml of water, heat it up to 50 °C, stir at 1000 rpm for 10 min, and add 1 part of methyl alcohol after the emulsification is complete. Methyl methacrylate and 0.075 parts of azobisisobutyronitrile were stirred for 20 min, then heated to 80 °C and stirred for 5 h. The reaction product was filtered at room temperature, washed with absolute ethanol for 2-3 times, and dried in vacuum for 24 h. White n-dodecanol phase-change microcapsules were obtained.

Then prepare the coating finish

After mixing 20 parts of water-based polyurethane, 5 parts of fatty alcohol polyoxyethylene ether, 10 parts of n-dodecanol phase change microcapsules, and 20 parts of polyhexamethyleneguanidine hydrochloride with a relative molecular mass of 2000 and distilled water, Configured as a coating finish.

Finally, the finishing solution was coated on the SMMS spunbond/meltblown composite non-woven fabric with a gram weight of 30 ^g /m2 by a dry coating process. The baking temperature was 60 °C and the baking time was 20 min. The spunbond/meltblown composite non-woven fabric with heat storage temperature adjustment temperature and antibacterial function was obtained after washing with water for 3 times and vacuum drying.

Example 2

A preparation method of a non-woven fabric with heat storage and temperature adjustment and antibacterial function, the steps are as follows:

First preparation of n-dodecanol phase change microcapsules

Slowly add 2 parts of n-dodecanol, 0.15 part of styrene maleic anhydride copolymer sodium salt and 0.25 part of pentaerythritol triacrylate to 100 ml of water, raise the temperature to 50 °C, and stir at 1000 rpm for 10 min. Add 1 part of methyl methacrylate and 0.075 part of azobisisobutyronitrile, stir for 30 min, then heat up to 85 °C and stir for 5 h, the reaction product is filtered at room temperature, washed with absolute ethanol 2-3 times, and vacuum After drying for 24 h, white n-dodecanol phase change microcapsules were obtained.

Then prepare the coating finish

After mixing 30 parts of water-based polyurethane, 2 parts of fatty alcohol polyoxyethylene ether, 20 parts of n-dodecanol phase change microcapsules, 20 parts of polyhexamethyleneguanidine hydrochloride with a relative molecular mass of 6000 and distilled water, Configured as a coating finish.

Finally, the finishing solution was coated on the SMS spunbond/meltblown composite non-woven fabric with a gram weight of 40 ^g /m2 by a dry coating process. The baking temperature was 70 °C and the baking time was 30 min. The spunbond/meltblown composite non-woven fabric with heat storage temperature adjustment temperature and antibacterial function was obtained after washing with water for 3 times and vacuum drying.

Example 3

A preparation method of a non-woven fabric with heat storage and temperature adjustment and antibacterial function, the steps are as follows:

First preparation of n-dodecanol phase change microcapsules

Slowly add 1 part of n-dodecanol, 0.2 part of styrene maleic anhydride copolymer sodium salt and 0.25 part of pentaerythritol triacrylate to 100 ml of water, raise the temperature to 50 °C, and stir at 1000 rpm for 15 min. Add 1 part of methyl methacrylate and 0.1 part of azobisisobutyronitrile, stir for 30 min, then heat up to 90 °C and stir for 7 h, the reaction product is filtered at room temperature, washed with absolute ethanol 2-3 times, vacuum After drying for 24 h, white n-dodecanol phase change microcapsules were obtained.

Then prepare the coating finish

After mixing 30 parts of water-based polyurethane, 1 part of sodium lauryl sulfate, 10 parts of n-dodecanol phase change microcapsules, and 20 parts of polyhexamethyleneguanidine hydrochloride with a relative molecular mass of 8000 and distilled water, Configured as a coating finish.

Finally, the dry coating process was used to coat the finishing solution on the SMS spunbond/meltblown composite non-woven fabric with a grammage of 100 ^g /m2, the baking temperature was 80 °C, and the baking time was 30 min. The spunbond/meltblown composite non-woven fabric with heat storage temperature adjustment temperature and antibacterial function was obtained after washing with water for 3 times and vacuum drying.

Example 4

A preparation method of a non-woven fabric with heat storage and temperature adjustment and antibacterial function, the steps are as follows:

First preparation of n-dodecanol phase change microcapsules

Slowly add 2 parts of n-dodecanol, 0.1 part of sodium dodecyl sulfate and 0.1 part of pentaerythritol tetraacrylate to 100 ml of water, raise the temperature to 50 °C, stir at 800 rpm for 15 min, and add 1.5 parts of methyl alcohol after the emulsification is complete. Methyl methacrylate and 0.05 part of azobisisobutyronitrile were stirred for 25 min, then heated to 80 °C and stirred for 7 h. The reaction product was filtered at room temperature, washed with absolute ethanol for 2-3 times, and dried in vacuum for 24 h. White n-dodecanol phase-change microcapsules were obtained.

Then prepare the coating finish

After mixing 50 parts of water-based polyurethane, 5 parts of sodium lauryl sulfate, 30 parts of n-dodecanol phase change microcapsules, and 5 parts of polyhexamethyleneguanidine hydrochloride with a relative molecular mass of 8000 and distilled water, Configured as a coating finish.

Finally, the finishing solution was coated on the SSMMSS spunbond/meltblown composite non-woven fabric with a gram weight of 100 ^g /m2 by a dry coating process. The baking temperature was 70 °C and the baking time was 25 min. The spunbond/meltblown composite non-woven fabric with heat storage temperature adjustment temperature and antibacterial function was obtained after washing with water for 3 times and vacuum drying.

Example 5

A preparation method of a non-woven fabric with heat storage and temperature adjustment and antibacterial function, the steps are as follows:

First preparation of n-dodecanol phase change microcapsules

Slowly add 2 parts of n-dodecanol, 0.2 part of styrene maleic anhydride copolymer sodium salt and 0.3 part of pentaerythritol triacrylate to 100 ml of water, raise the temperature to 50 °C, and stir at 900 rpm for 12 min. Add 1 part of methyl methacrylate and 0.05 part of azobisisobutyronitrile, stir for 25 min, then heat up to 90 °C and stir for 6 h, the reaction product is filtered at room temperature, washed with absolute ethanol 2-3 times, and vacuumed After drying for 24 h, white n-dodecanol phase change microcapsules were obtained.

Then prepare the coating finish

After mixing 40 parts of water-based polyurethane, 5 parts of sodium lauryl sulfate, 20 parts of n-dodecanol phase change microcapsules, and 15 parts of polyhexamethyleneguanidine hydrochloride with a relative molecular mass of 8000 and distilled water, Configured as a coating finish.

Finally, the dry coating process was used to coat the finishing liquid on the SMS spunbond/meltblown composite non-woven fabric with a gram weight of 40 ^g /m2 at a baking temperature of 70 °C and a baking time of 25 min. The spunbond/meltblown composite non-woven fabric with heat storage temperature adjustment temperature and antibacterial function was obtained after washing with water for 3 times and vacuum drying.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1. a kind of preparation method of the non-woven cloth with heat-accumulation temperature-adjustment and antibacterial functions, it is characterised in that the following steps are included:

(1) preparation of phase-change microcapsule

A certain proportion of n-dodecanol, emulsifier and crosslinking agent are slowly added into 100 ml water, adjust the temperature to 50 DEG C, 10-15 min is stirred under 800-1000 rpm, obtains emulsion；Backward emulsion in methyl methacrylate and azo is added Bis-isobutyronitrile stirs 20-30 min, and then temperature is maintained at stirring 5-7 h at 80-90 DEG C, and reaction product is through suction filtration, anhydrous second Phase-change microcapsule is obtained after alcohol washing, 24 h of vacuum drying；

(2) preparation of top finish liquid

After aqueous polyurethane, surfactant, phase-change microcapsule, antibacterial agent, distilled water are mixed evenly in proportion, configuration At top finish liquid；

(3) preparation of functionalization spun-bonded/melt-blown composite nonwoven fabric

Finishing fluid is coated on spun-bonded/melt-blown composite nonwoven fabric using dry coating technique, after baking, wash, being dry To the spun-bonded/melt-blown composite nonwoven fabric with heat-accumulation temperature-adjustment and antibacterial functions.

2. the preparation method of the non-woven cloth according to claim 1 with heat-accumulation temperature-adjustment and antibacterial functions, feature exist In: n-dodecanol is core material in the step (1), and methyl methacrylate is wall material, and n-dodecanol, emulsifier, crosslinking agent, The mass ratio of methyl methacrylate and azodiisobutyronitrile is (1-5): (0.1-0.2): (0.1-0.3): (1-2): (0.05- 0.1).

3. the preparation method of the non-woven cloth according to claim 1 with heat-accumulation temperature-adjustment and antibacterial functions, feature exist In: in the step (1) emulsifier be one of styrene maleic anhydride copolymer sodium salt or lauryl sodium sulfate or its Mixture；Crosslinking agent is or mixtures thereof one of pentaerythritol triacrylate or pentaerythritol tetraacrylate.

4. the preparation method of the non-woven cloth according to claim 1 with heat-accumulation temperature-adjustment and antibacterial functions, feature exist In: surfactant is one of fatty alcohol polyoxyethylene ether or lauryl sodium sulfate or its mixing in the step (2) Object；Antibacterial agent is poly (hexamethylene) hydrochloride, relative molecular mass 2000-8000.

5. the preparation method of the non-woven cloth according to claim 1 with heat-accumulation temperature-adjustment and antibacterial functions, feature exist In: aqueous polyurethane solid content is 35-40% in the step (2), and pH 6-9, shear strength is 180-220 MPa, elongation For 1000-1200%.

6. the preparation method of the non-woven cloth according to claim 1 with heat-accumulation temperature-adjustment and antibacterial functions, feature exist In the mass ratio of: aqueous polyurethane in the step (2), surfactant, phase-change microcapsule, antibacterial agent, distilled water be (20- 50): (1-5): (10-30): (5-20): (10-45).

7. the preparation method of the non-woven cloth according to claim 1 with heat-accumulation temperature-adjustment and antibacterial functions, feature exist In: stoving temperature is 60-80 DEG C in the step (3), baking time 20-30min.

8. the preparation method of the non-woven cloth according to claim 1 with heat-accumulation temperature-adjustment and antibacterial functions, feature exist In: in the step (3) spun-bonded/melt-blown composite nonwoven fabric be one or more of polypropylene or polyester, selected from SMS, At least one of SMMS, SMMMS, SMMSS, SSMMSS, grammes per square metre 30-100g/m²。