CN111945291A - A kind of anti-seepage sanitary material wrapping cloth and preparation method thereof - Google Patents

Abstract

The invention belongs to the technical field of non-woven fabrics, and discloses an anti-seepage sanitary material wrapping cloth and a preparation method thereof. The impermeable sanitary material wrapping cloth includes more than two layers of fiber layers; the fiber layers are a structure layer for moisture absorption and perspiration, a structure layer for reinforcement, a structure layer for softening, a structure layer for elasticity, and a structure layer for barrier function. , any one of the structural layer of friction massage effect, the structural layer of skin care effect, the structural layer of ice cooling and anti-inflammatory effect, the structural layer of antibacterial and anti-mosquito and anti-mite effect; adopt one-step molding process to produce fibers containing the same or different functions layer of wrapping cloth. The wet strength of the anti-seepage sanitary material wrapping cloth is greater than 10N/5cm, the wet elongation rate is greater than 20%, and the reverse osmosis amount is less than 2g. mm, the air permeability is greater than 40mm/s, and can be used in the production of sanitary products such as menstrual safety pants, children's pull-up pants, and adult incontinence pants.

Description

A kind of anti-seepage sanitary material wrapping cloth and preparation method thereof

technical field

The invention belongs to the technical field of non-woven fabrics, and relates to an impermeable sanitary material wrapping cloth and a preparation method thereof.

Background technique

Under the trend of modern people's fast-paced life, disposable sanitary products must not only have good liquid absorption performance, but also have good strength and low reverse osmosis performance. Most of the existing sanitary material wrapping cloths on the market are dust-free paper and its composite products. Such products have high brittleness, low wet strength and low elongation, and the sanitary products made are not wear-resistant, easy to break, and easy to leak. , the use of comfort needs to be enhanced.

SUMMARY OF THE INVENTION

In order to overcome the deficiencies of the prior art, the present invention provides an impermeable sanitary material wrapping cloth and a preparation method thereof. The raw material of the impermeable sanitary material wrapping cloth is composed of fibers, and the wet state strength of the impermeable sanitary material wrapping cloth is greater than 10N/5cm, The wet elongation is greater than 20%, the anti-seepage sanitary material wrapping has good toughness and is not easy to be damaged in wet state, the reverse osmosis amount is less than 2g, the anti-seepage sanitary material wrapping is light and breathable, and the impermeable sanitary material wrapping thickness is less than 0.35 mm, the air permeability is greater than 40mm/s, and can be used in the production of sanitary products such as menstrual safety pants, children's pull-up pants, and adult incontinence pants.

Above-mentioned purpose of the present invention is achieved through the following technical solutions:

An impermeable sanitary material wrapping cloth; comprising two or more fiber layers; the fiber layers are a structure layer for moisture absorption and perspiration, a structure layer for reinforcement, a structure layer for softening, a structure layer for elasticity, and a barrier function Any of the structural layer, the structural layer of friction massage effect, the structural layer of skin care effect, the structural layer of ice cooling and anti-inflammatory effect, the structural layer of antibacterial and anti-mosquito and anti-mite effect;

The gram weight of the impermeable sanitary material is 15-82.5g/m ² ; the material of the fiber layer is one or more of cellulose fibers and chemical fibers; the gram weight of each layer of the fiber layer The range is 7.5 to 27.5 g/m ² .

The material of the fiber layer is one or more of pulp fibers, ultra-short fibers, chopped fibers and continuous filaments, wherein the pulp fibers have a width ranging from 0.1 μm to 50 μm and a length ranging from 0.5 mm to 5 mm. , the width of ultra-short fibers ranges from 0.1 μm to 50 μm and the length ranges from 2 mm to 20 mm. The width of chopped fibers ranges from 0.1 μm to 50 μm and the length ranges from 15 mm to 76 mm. The width distribution of continuous filaments ranges from 0.1 μm to 20 mm. 500 μm, the fibers have a continuous length.

The anti-seepage sanitary material wrapping cloth obtains structural layers with different functions by selecting and adjusting the materials of the fiber layers with different functions.

The material of the structural layer for the moisture absorption and perspiration effect is composed of natural fibers and regenerated fibers with a moisture regain greater than 4%, such as wood fibers, cotton fibers, hemp fibers, viscose fibers, acetate fibers, cupro fibers, lyocell One or more of fiber, protein fiber and polyvinyl alcohol fiber.

The structural layer material of the reinforcing effect is composed of chopped fibers and continuous filaments with a strength greater than 3.5cN/dtex, such as polyester fibers, polypropylene fibers, nylon fibers, ethylene fibers, hemp fibers, high-strength viscose fibers, and silk fibers. , one or more of polylactic acid fiber, animal and plant polyester fiber.

The material of the structural layer for softening is composed of fibers with a modulus less than 8Km/mm ² , such as one or more of cotton fibers, acetate fibers, and protein fibers.

The material of the elastic structural layer is composed of fibers with an elastic recovery rate greater than 85% at 3% elongation, such as one or two of elastic polypropylene fibers, nylon fibers, TPU fibers, animal and plant polyester fibers, and polylactic acid fibers. more than one species.

The material of the structural layer for the barrier effect is composed of fibers with a water absorption rate of less than 1%, such as one or more of polypropylene fibers and ethylene fibers.

The material of the structural layer of the friction massage effect is composed of fibers with a friction coefficient greater than 0.6, such as one or more of hemp fibers and polyester fibers with special-shaped cross-sections.

The structural layer of the skin care effect is composed of viscose fiber and polyester fiber containing VE, VC, and amino acid capsule particles.

The structural layer of the ice cooling and anti-inflammatory effect is composed of viscose fiber and polyester fiber containing aloe vera essence, cactus essence, and menthol cooling factor.

The structure layer with antibacterial, anti-mosquito and anti-mite effects is composed of viscose fiber and polyester fiber containing wormwood extract, paeonol extract, chrysanthemum extract, citrus peel extract and pine oil extract.

The above-mentioned preparation method of the anti-seepage sanitary material wrapping cloth adopts a one-step molding process to produce the wrapping cloth containing the same or different functional fiber layers, which is a physical principle preparation method with environmental protection characteristics, and the steps are as follows:

S1. Preparation of fiber layer

(1) The fiber layer is made of pulp fiber. The preparation is done in a liquid medium. The concentration of pulp fiber is 0.5-20%, the speed of the stirring paddle is 5-1000r/min, and the stirring time is 2-20min. More than 70% of the media can be recycled.

(2) The preparation of the fiber layer made of ultra-short fibers is done in a liquid medium. The concentration of ultra-short fibers ranges from 0.5 to 10%, the speed of the stirring paddle ranges from 2 to 900 r/min, and the stirring time ranges from 1 to 20 minutes. More than 70% of the media can be recycled.

(3) The preparation of the fiber layer made of chopped fibers is done under the action of carding. The main cylinder speed is 850-1200r/min, the breast cylinder speed is 450-850r/min, the high-speed random speed is 1000-1500r/min, and the doffer speed is 1000-1500r/min. The speed is 30～85r/min, and the output speed of the fiber network is 85～300m/min.

(4) The preparation of the fiber layer material is filament fiber is completed on the tension automatic adjustment feeder, the tension control range is 6-300cN, and PLC control can realize automatic roll change.

S2, composite fiber layer

The prepared in step S1 is prepared in the way of multi-stage mesh curtain mechanical laying: a fiber layer made of pulp fibers, a fiber layer made of ultra-short fibers, a fiber layer made of chopped fibers, and a fiber layer made of filament fibers. Two or more kinds of fiber layers in the fiber layer are collected together and composited. According to the different functions of the fiber layers, the order of the fiber layers is adjusted from top to bottom.

S3, consolidation

Transfer the multi-layer fiber layers prepared in step S2 from the mesh curtain to the drum for high-pressure water jet consolidation. The pressure range of the water jet is 15-200 bar, the number of drums is 1-5, and the drum speed ratio is in the range. 0.8～1.4, the surface of the drum has different textures, and the single fibers and fiber layers in the consolidated fiber network are tightly entangled together, and the fiber network not only has good strength, but also forms on the surface of the fiber network. Various textures, such as raised dots, woven cloth textures, "V" shaped textures, etc. In addition, more than 30% of the water resources after water jet use can be recycled.

Because the density of chemical fiber is 0.91～1.35g/cm ³ , the moisture regain of chemical fiber is 0～4%, the density of cellulose fiber is 1.38～1.58g/cm ³ , and the moisture regain of cellulose fiber is 8～15%, so under high pressure Under the action of negative pressure suction under water flow, one side of the anti-seepage sanitary material wrapping cloth is a fiber layer made of chemical fiber with low density and low moisture regain, and the other side is a fiber layer made of cellulose material with high density and high moisture regain. , the impermeable sanitary material wrapping cloth has a unidirectional diversion effect on the liquid, the liquid can easily pass from the fiber layer of chemical fiber material to the fiber layer of cellulose material, and vice versa is not easy, so the product has better reverse osmosis performance.

S4, drying into rolls

The fiber layer base cloth obtained after consolidation in step S3 is dried, and the fiber layer base cloth first passes through a dehydration mechanism, so that the moisture content of the fiber layer base cloth is less than 80%, and then passes through the main oven waste heat recovery pre-drying equipment, and the temperature is greater than 60 ℃, and finally pass through the main oven, the temperature is less than 105 degrees, the preferred oven process temperature range is 80 to 95 degrees, to ensure the minimum loss rate of functional components in the fiber layer base fabric, the power of the exhaust fan is greater than 40%, and the power of the air supply fan is less than 30%, the drying time is less than 10 minutes, and the anti-seepage sanitary material wrapping cloth is obtained after drying into a roll.

The anti-seepage sanitary material wrapping cloth provided by the invention is applied to sanitary products, such as menstrual safety pants, pull-up pants for children, incontinence pants for adults and other products.

The beneficial effects of the present invention compared with the prior art are:

The invention provides an anti-seepage sanitary material wrapping cloth and a manufacturing method thereof, which can realize the use of fibers with different length specifications on the same production line, and the hierarchical structure of the fibers can be replaced at any time as required. Compared with the existing sanitary material wrapping products on the market, without using chemical enhancers, the anti-seepage sanitary material wrapping cloth provided by the present invention has good toughness, high strength, is not easily damaged in wet state, and has a reverse osmosis amount. inferior advantages. In addition, the method provided by the present invention comprehensively utilizes energy resources in the preparation process, and reduces the consumption of water, electricity and gas.

Description of drawings

Below in conjunction with accompanying drawing and embodiment, the present invention is further described:

FIG. 1 is a schematic diagram of the structure of the impermeable sanitary material wrapping cloth of Example 1 of the present invention.

1. Fiber layer A, 2. Fiber layer B in the figure.

Detailed ways

The present invention is described in detail below through specific embodiments, but the protection scope of the present invention is not limited. Unless otherwise specified, the experimental methods used in the present invention are all conventional methods, and the experimental equipment, materials, reagents, etc. used can be obtained from commercial sources.

Example 1

The weight of the impermeable sanitary material package is 38g/m ² , the weight of the fiber layer A is 19g/m ² , the weight of the fiber layer B is 19g/m ² , and the material of the fiber layer B is 90wt% wood fiber, 10wt% high absorbent Ultra-chopped viscose fiber with liquid factor, the fiber layer A is made of 100wt% polyester fiber; the width of wood fiber fiber is 28-40 μm, and the length of wood fiber fiber is 1-4 mm; the width of ultra-chopped viscose fiber with high liquid absorption factor is 12 ～14μm, the ultra-short cut viscose fiber with high liquid absorption factor has a length of 5-10mm; the width of the polyester fiber is 12-14μm, and the length of the polyester fiber is 10-20mm. The preparation of ultra-chopped viscose fiber and wood fiber fiber is completed under the action of a crusher. The beater speed of the crusher is 500r/min, the speed of the stirring paddle is 600r/min, the stirring time is 10min, and the concentration of the mixed fiber solution is 5.5%; polyester Fiber preparation is completed under the action of carding, the main cylinder speed is 950r/min, the breast cylinder speed is 550r/min, the high-speed random speed is 1050r/min, the doffer speed is 50r/min, and the fiber output speed is 180m/min. The web-forming speed of the fiber layer is 180m/min, the thickness is 3mm, the spunlace entanglement pressure is 20-80bar, the number of drums is 3, and the drum speed ratio is 1.05. Sweat effect, the strength of the anti-seepage sanitary material wrapping cloth is greater than 15N/5cm, the elongation rate is greater than 30%, and the amount of reverse osmosis is less than 2 grams.

Example 2

The weight of the impermeable sanitary material package is 45g/m ² , the weight of the fiber layer a is 15g/m ² , the weight of the fiber layer b is 30g/m ² , the material of the fiber layer b is 100% hemp fiber, and the material of the fiber layer a is 100% polypropylene fiber; hemp fiber width 40-50μm, hemp fiber length 4-10mm; polypropylene fiber width 10-25μm, polypropylene fiber length ≥100mm. The preparation of hemp fiber is completed under the action of the crusher. The beater speed of the crusher is 500r/min, the speed of the stirring paddle is 600r/min, the stirring time is 10min, and the concentration of the mixed fiber liquid is 1.5%; the preparation of polypropylene fiber is automatically adjusted in the tension. Completed on the feeder, the tension control range is 6 ~ 300cN, and PLC control can realize automatic roll change. The web-forming speed of the fiber layer is 150m/min, the thickness is 5mm, the spunlace entanglement pressure is 25-100bar, the number of drums is 5, and the drum speed ratio is 1.15. The layer a has the functions of softness and barrier, the strength of the anti-seepage sanitary material wrapping cloth is greater than 20N/5cm, the elongation rate is greater than 25%, and the reverse osmosis amount is less than 1.8 grams.

Example 3

The weight of the impermeable sanitary material package cloth is 80g/m ² , the weight of the fiber layer c is 55g/m ² , the weight of the fiber layer d is 25g/m ² , and the material of the fiber layer d is 70% wood fiber, 30% cotton fiber , the fiber layer c is made of 18% polypropylene fiber, 82% polyester fiber; the width of wood fiber is 28-40 μm, the length of wood fiber is 1-4 mm, the width of cotton fiber is 10-14 μm, and the length of cotton fiber is 5-15 mm; the width of polypropylene fiber is 23-27 μm , The length of polypropylene fiber is ≥100mm, the width of polyester fiber is 12-14μm, and the length of polyester fiber is 25-76mm. The preparation of wood fiber and cotton fiber is completed under the action of the crusher. The beater speed of the crusher is 500r/min, the speed of the stirring paddle is 600r/min, the stirring time is 10min, and the concentration of the mixed fiber solution is 3.5%; The tension control range is 6~300cN; the preparation of polyester fiber is completed under the action of carding, the main cylinder speed is 950r/min, the breast cylinder speed is 550r/min, the high-speed random speed is 1050r/min, the doffer Speed 50r/min, fiber output speed 180m/min. The web-forming speed of the fiber layer is 180m/min, the thickness is 8mm, the spunlace entanglement pressure is 35-120bar, the number of drums is 5, and the drum speed ratio is 1.25. The fiber layer d of the sanitary material wrapping cloth has the functions of moisture absorption and softness, the strength of the impermeable sanitary material wrapping cloth is greater than 25N/5cm, the elongation rate is greater than 20%, and the reverse osmosis amount is less than 1.92 grams.

The above-mentioned embodiments are only preferred embodiments of the present invention, rather than all possible embodiments of the present invention. For those skilled in the art, any obvious changes made to it without departing from the principle and spirit of the present invention should be considered to be included in the protection scope of the claims of the present invention.

Claims (4)

1. An impermeable sanitary material wrapping cloth is characterized by comprising more than two fiber layers; the fiber layer is any one of a structural layer with moisture absorption and sweat releasing functions, a structural layer with reinforcing functions, a structural layer with softening functions, a structural layer with elastic functions, a structural layer with blocking functions, a structural layer with friction and massage functions, a structural layer with skin care functions, a structural layer with ice-cooling and anti-inflammation functions and a structural layer with antibacterial, mosquito-proof and anti-mite functions; the fiber layer is made of one or more than two of cellulose fiber and chemical fiber; the gram weight range of each layer of the fiber layer is 7.5-27.5 g/m²。

2. The cloth according to claim 1, wherein the fiber layer is made of one or more of pulp fibers, ultra short fibers, short cut fibers and continuous filaments, wherein the pulp fibers have a width ranging from 0.1 μm to 50 μm and a length ranging from 0.5mm to 5mm, the ultra short fibers have a width ranging from 0.1 μm to 50 μm and a length ranging from 2mm to 20mm, the short cut fibers have a width ranging from 0.1 μm to 50 μm and a length ranging from 15mm to 76mm, the continuous filaments have a width ranging from 0.1 μm to 500 μm, and the fibers have continuous lengths.

3. The sanitary barrier material cover according to claim 2,

the structural layer with the functions of moisture absorption and sweat releasing is made of natural fibers and regenerated fibers with the moisture regain of more than 4%, such as one or more of wood fibers, cotton fibers, hemp fibers, viscose fibers, acetate fibers, cuprammonium fibers, lyocell fibers, protein fibers and polyvinyl alcohol fibers;

the structural layer with the reinforcing effect is made of chopped fibers and continuous filaments with the strength larger than 3.5cN/dtex, such as one or more than two of polyester fibers, polypropylene fibers, nylon fibers, polyethylene fibers, fibrilia, rich viscose fibers, silk fibers, polylactic acid fibers and animal and plant polyester fibers;

the structural layer with the softening function is made of a material with the modulus less than 8Km/mm²The fiber composition of (a), such as one or more of cotton fiber, acetate fiber and protein fiber;

the material of the elastic structure layer is composed of fibers with the elastic recovery rate of more than 85% when the elastic structure layer is extended by 3%, such as one or more of elastic polypropylene fiber, polyamide fiber, TPU fiber, animal and plant polyester fiber and polylactic acid fiber;

the material of the structural layer with the barrier effect is composed of fibers with the water absorption rate of less than 1%, such as one or more than two of polypropylene fibers and polyethylene fibers;

the structural layer with the friction massage effect is made of fibers with the friction coefficient larger than 0.6, such as one or more than two of fibrilia and polyester fibers with special-shaped cross sections;

the structure layer with the skin care effect consists of viscose fibers containing VE, VC and amino acid capsule particles and polyester fibers;

the structural layer with the cooling and inflammation diminishing effects consists of viscose fiber and polyester fiber containing aloe essence, cactus essence and menthol cooling factors;

the structural layer with antibacterial, mosquito-proof and mite-proof effects comprises viscose fiber and polyester fiber containing folium Artemisiae Argyi extract, paeonol extract, flos Chrysanthemi extract, mandarin orange peel extract, pine tree oil extract.

4. A method for preparing a wrapping cloth of impermeable sanitary material as claimed in claims 1-3, characterized in that the wrapping cloth containing the same or different functional fiber layers is produced by a one-step forming process, which comprises the following steps:

s1 preparation of fiber layer

(1) The preparation of the fiber layer material which is pulp fibers is completed in a liquid medium, the concentration range of the pulp fibers is 0.5-20%, the speed range of the stirring paddle is 5-1000 r/min, the stirring time range is 2-20 min, and more than 70% of the liquid medium can be recycled;

(2) the preparation of the fiber layer made of the ultrashort fibers is completed in a liquid medium, the concentration range of the ultrashort fibers is 0.5-10%, the speed range of the stirring paddle is 2-900 r/min, the stirring time range is 1-20min, and more than 70% of the liquid medium can be recycled;

(3) the preparation of the fiber layer made of the chopped fibers is completed under the carding action, the speed of a main cylinder is 850-1200 r/min, the speed of a chest cylinder is 450-850 r/min, the high-speed disorderly speed is 1000-1500 r/min, the doffer speed is 30-85 r/min, and the output speed of a fiber network is 85-300 m/min;

(4) the preparation of the fiber layer made of filament fibers is completed on an automatic tension adjusting and releasing device, the tension control range is 6-300 cN, and the PLC control can realize automatic reel change;

s2 composite fiber layer

And (3) adopting a multi-section net curtain mechanical lapping mode to perform the following steps of S1: two or more fiber layers of a fiber layer made of pulp fibers, a fiber layer made of ultrashort fibers, a fiber layer made of short fibers and a fiber layer made of filament fibers are collected together and compounded, and the fiber layers are adjusted from top to bottom according to different functions of the fiber layers;

s3, consolidation

Transferring the multiple fiber layers prepared in the step S2 of conveying the net curtain to a rotary drum for high-pressure water jet consolidation, wherein the pressure range of the water jet is 15-200 bar, the number range of the rotary drum is 1-5, the speed ratio range of the rotary drum is 0.8-1.4, the surface of the rotary drum is provided with lines with different depths, and the consolidated single fibers in the fiber network and the fiber layers are tightly wound together to form various lines on the surface of the fiber network, such as raised dots, woven fabric lines, V-shaped lines and the like;

s4, drying and coiling

And (4) drying the fiber layer base cloth obtained after consolidation in the step (S3), enabling the fiber layer base cloth to pass through a dehydration mechanism to enable the water content of the fiber layer base cloth to be less than 80%, then passing through a main oven waste heat recovery pre-drying device, enabling the temperature to be more than 60 ℃, finally passing through the main oven, enabling the temperature to be less than 105 ℃, enabling the power of an exhaust fan to be more than 40%, the power of an air supply fan to be less than 30%, and drying time to be less than 10min, and drying and coiling to obtain the anti-seepage sanitary material wrapping cloth.

Images