CN111270415B

CN111270415B - High wet strength dustless paper and makeup removing article

Info

Publication number: CN111270415B
Application number: CN202010076250.9A
Authority: CN
Inventors: 朱明晖; 郝景标
Original assignee: Nox Bellcow Cosmetics Co Ltd
Current assignee: Nox Bellcow Cosmetics Co Ltd
Priority date: 2020-01-23
Filing date: 2020-01-23
Publication date: 2021-12-21
Anticipated expiration: 2040-01-23
Also published as: CN111270415A

Abstract

The invention discloses a high wet strength dustless paper and a makeup removing article; the dust-free paper comprises a top layer, a middle layer and a bottom layer; wherein, the top layer comprises fluff pulp fiber, lyocell short fiber and hot melt short fiber, the middle layer comprises fluff pulp fiber, hot melt short fiber and high molecular water absorbent resin material (SAP), and the bottom layer comprises fluff pulp fiber, lyocell short fiber and hot melt short fiber; the hot-melt short fiber is a PE/PP bi-component sheath-core structure composite fiber, after the fiber is subjected to heat treatment, one part of the sheath layer is melted to play a role in bonding, and the rest of the fiber still keeps a fiber state; the outer surface of the top layer and the outer surface of the bottom layer are coated with an adhesive. The dust-free paper has the characteristics of high hygroscopicity, high wet strength, good flexibility, high bulkiness, no dust falling and the like, is particularly suitable for removing the makeup towel, and has small change of the dry strength and the wet strength.

Description

High wet strength dustless paper and makeup removing article

Technical Field

The invention relates to a high wet strength dustless paper and a makeup removing article.

Background

A non-woven fabric for making paper by dry method, named as dustless paper, is made up of wood pulp fibres through airflow lapping and consolidation. The paper can be classified into adhesive paper, heat-seal paper and synthetic paper according to different bonding forms. The dust-free paper product is mainly a series of articles for daily use, has good dry and wet strength, softness and water absorption, can be made into various bedsheets, tablecloths, napkins, wet tissues and the like by processing such as laminating, printing, dyeing and the like, and can also be widely used as a core layer material of sanitary articles.

Chinese patent application CN201910146602.0 discloses a dust-free paper with high water absorption performance and a preparation method thereof, wherein the dust-free paper comprises, by weight, 20-40 parts of a first layer, 10-50 parts of a second layer and 10-30 parts of a third layer; wherein, the first layer includes wood pulp fibre and ES fibre, and the second layer includes wood pulp fibre, polymer absorbent resin and polymer absorbent fibre, and the third layer includes wood pulp fibre. The application uses the SAF and the SAP simultaneously in the dust-free paper, has the characteristics of high water absorption performance, light weight and good toughness, and is suitable for being used as sanitary products such as paper diapers, sanitary towels and the like.

Chinese patent application CN201910045594.0 discloses a high-toughness dust-free paper and a preparation method thereof, wherein the dust-free paper comprises, by weight, 10-30 parts of a first layer, 10-50 parts of a second layer and 10-50 parts of a third layer; wherein the first layer comprises 100% ES fibers, the second layer comprises 5-15% wood pulp fibers and 85-95% ES fibers, and the third layer comprises 5-15% wood pulp fibers and 85-95% ES fibers. The dust-free paper is made of ES fibers and fluff pulp, can be used as tablecloth to replace disposable plastic tablecloth, and is more environment-friendly.

Chinese patent application CN201910045590.2 discloses a thin type dust-free paper for absorbing liquid and a preparation method thereof, wherein the dust-free paper comprises, by weight, 10-40 parts of an upper isolation layer, 20-50 parts of a water absorption layer and 10-40 parts of a lower isolation layer; wherein, the upper isolation layer comprises 50-80% of wood pulp fiber and 20-50% of ES fiber, the water absorption layer comprises 50-80% of wood pulp fiber, 1-5% of high molecular water absorption resin and 10-30% of ES fiber, and the lower isolation layer comprises 50-80% of wood pulp fiber and 20-50% of ES fiber. The dust-free paper does not contain an adhesive, is thin, light in weight, fast in water absorption and good in diversion effect, and is suitable for the absorption material of disposable hygienic products.

In recent years, with the temperature rise of the makeup market, the potential of makeup removing products is rapidly released. It is expected that with the increasing health awareness of residents and the increasing living standard, more and more female consumers will use the makeup removing products, the importance of the makeup removing products in cosmetics becomes more and more prominent, and the market demand of the makeup removing products will be rapidly increased. Generally, the major products of makeup removers include makeup removing oil, makeup remover, makeup removing spray, makeup removing towel, makeup removing cream, and the like. Modern people's fast rhythm life needs more convenient mode of removing makeup a lot, and traditional oil of removing makeup, the water of removing makeup are too loaded down with trivial details, carry inconvenience, and the piece of cloth of removing makeup just needs to be transported to life, only needs to remove the stubborn makeup with the piece of cloth of removing makeup gently and clean, can remove stubborn makeup fast, feels the convenient sense that the hand was got up to make up and is fallen. In recent years, the makeup removing towel gradually replaces makeup removing oil and makeup removing water, and the use of dust-free paper as the makeup removing wet tissue is a new breakthrough.

From the whole market, the makeup removing product market is in the growing stage, and more improvements are needed in the aspects of raw material links and the effects. The consumer group of the present makeup removing products is still small and only accounts for 1/4 of the number of consumers who buy the makeup remover. This means that, with the development of cosmetics and the upgrading of the maturity of makeup cosmetics of Chinese consumers, the makeup removing products have a large development space, and the demand of the makeup removing wet tissues is more and more increased.

The use of dust-free paper for removing make-up towels is a new attempt. Generally, the dry and wet strength of the glued dust-free paper is high, dust is not dropped, and the glued dust-free paper is suitable for being in direct contact with a human body; the heat-seal dust-free paper has good softness, fluffiness, higher thickness and strong water absorption, but has the phenomenon of dust falling, low strength and large change of dry and wet strength. Factors that consumers may consider when using a dust free paper product: (1) the product appearance is as follows: most of products taking the dust-free paper as the raw material are medium-high grade products, the appearance is more exquisite, the independent products feel soft and comfortable, and the feeling of hard blocks and different thicknesses is avoided; (2) the use effect is as follows: the dry and wet strength of the dust-free paper is high, the performance is excellent, and the manufactured wet tissue has no dust and paper scraps, and not only has good water absorption, but also has water retention performance. Both of the above are unsuitable for use in makeup removing wet wipes, both of glued and heat-sealed, so a long product is required, and a combination of both is certainly the best choice.

Therefore, there is a need for a new type of dust-free paper which has high moisture absorption, high wet strength, good flexibility, high bulk, no dust fall, and the like, is suitable for use in makeup removal towels, and meets the current market.

Disclosure of Invention

The invention aims to provide the dust-free paper with high wet strength, which has the characteristics of good softness, high bulkiness, high hygroscopicity and no dust falling.

Another object of the present invention is to provide a makeup removing article such as a makeup removing towel which can effectively remove makeup and is soft and comfortable in use, convenient to carry and easy to store.

In order to achieve the above object, the present invention provides a dust-free paper comprising, by dry weight parts, 20 to 60 parts of a top layer, 20 to 60 parts of a middle layer and 20 to 60 parts of a bottom layer; wherein the top layer further comprises fluff pulp fibers, lyocell staple fibers and heat-fusible staple fibers, the middle layer further comprises fluff pulp fibers, heat-fusible staple fibers and a high molecular water absorbent resin material (SAP), and the bottom layer further comprises fluff pulp fibers, lyocell staple fibers and heat-fusible staple fibers; before hot melting treatment, the hot-melt short fiber is a PE/PP bi-component sheath-core structure composite fiber, after hot melting treatment, one part of the sheath layer is melted to play a role in bonding, and the rest of the sheath layer still keeps a fiber state; wherein the outer surface of the top layer and the outer surface of the bottom layer are coated with an adhesive.

In the dust-free paper, the production and processing of the used fluff pulp fiber are physical processes, chemical substances harmful to human bodies or air are not generated, the spinnability of the fluff pulp fiber is strong, and the raw material is derived from wood pulp and can be naturally degraded.

In the dust-free paper, the adopted lyocell short fibers meet the standard FZ/T52019-2018 (the textile industry standard of the people's republic of China. the lyocell short fibers have high dry and wet strength, good swelling property and high fiber polymerization degree, and can improve the softness, air permeability and moisture absorption of the product.

In the dust-free paper, the adopted hot-melt short fibers are PE/PP bi-component sheath-core structure composite fibers, after the fibers are subjected to heat treatment, part of the sheath layer is melted to play a bonding role, and the rest of the sheath layer still keeps the fiber state and has the characteristic of small heat shrinkage; this provides the dust-free paper of the present invention with excellent softness, bulk, thickness and water absorbency.

In the dust-free paper, the super absorbent resin is the super absorbent resin with hydrophilic groups, can absorb water which is equivalent to more than 100 times of the volume of the super absorbent resin, has the highest water absorption rate of more than 1000 times, and has no irritation to a human body and no side reaction.

In the dust-free paper of the invention, in order to prevent the dust falling phenomenon, the outer surface of the top layer and the outer surface of the bottom layer of the dust-free paper are coated with adhesives. Preferably, the adhesive of the present invention is an ethylene-vinyl acetate copolymer (EVA) with ethylene and vinyl acetate contents of 60: 40, it has good adhesive property, is non-toxic and harmless, and can be degraded.

Preferably, the dust-free paper of the present invention comprises 30 to 60 parts of the top layer, 30 to 60 parts of the middle layer and 30 to 60 parts of the bottom layer by dry weight parts. More preferably, the dust-free paper of the present invention comprises 30 to 50 parts of the top layer, 30 to 50 parts of the middle layer and 30 to 50 parts of the bottom layer by dry weight parts. Further preferably, the dust-free paper of the present invention comprises 35 to 45 parts of the top layer, 35 to 45 parts of the middle layer and 35 to 45 parts of the bottom layer.

In the dust-free paper of the present invention, the top layer thereof comprises 45 to 75 parts by dry weight of fluff pulp fibers, 10 to 45 parts by dry weight of lyocell short fibers and 10 to 15 parts by dry weight of heat-fusible short fibers. Preferably, the top layer of the dust-free paper comprises 50-70 parts of fluff pulp fibers, 15-40 parts of lyocell staple fibers and 10-15 parts of heat-fusible staple fibers.

In the dust-free paper, the intermediate layer comprises 70-85 parts of fluff pulp fiber, 15-30 parts of hot-melt short fiber and 5-10 parts of high-molecular water-absorbent resin material in parts by dry weight. Preferably, the middle layer of the dust-free paper comprises 70-80 parts of fluff pulp fibers, 15-25 parts of hot-melt short fibers and 5-10 parts of high-molecular water-absorbent resin material.

In the dust-free paper of the present invention, the bottom layer thereof comprises 45 to 75 parts by dry weight of fluff pulp fibers, 10 to 45 parts by dry weight of lyocell short fibers and 10 to 15 parts by dry weight of heat-fusible short fibers. Preferably, the base layer of the dust-free paper comprises 50-70 parts of fluff pulp fibers, 15-40 parts of lyocell staple fibers and 10-15 parts of heat-fusible staple fibers. The composition of the bottom layer of the dusting paper may be the same as or different from, preferably the same as, the composition of the top layer of the dusting paper.

In the dust-free paper of the present invention, each of the top layer, the middle layer and the bottom layer thereof may include more than one sub-layer.

Preferably, the dust-free paper of the present invention is obtained by compacting (preferably hot compacting) and then hot-melting.

The dust-free paper is prepared by adopting a comprehensive method of combining latex bonding and hot melt bonding: a small amount of latex is coated on the outer surface of the top layer and the outer surface of the bottom layer of the dust-free paper, and hot-melt short fibers are used for bonding in the central part of the dust-free paper. As the web forming the airlaid paper dries and cures, the heat-fusible staple fibers melt and bond with the fluff pulp fibers and lyocell staple fibers. The hot-melt short fibers can increase the bulkiness of the dust-free paper, improve the strength, and reduce the hair falling phenomenon caused by the loose property of wood pulp fibers by latex bonding.

In another aspect, to achieve the objects of the present invention, the present invention also provides a makeup removing article using the dust-free paper as described above.

Further, the makeup removing article may be a makeup removing towel.

Of course, the dust-free paper is mainly applied to makeup removing towels and also can be suitable for disposable sanitary products, such as sanitary towels and the like.

In another aspect, the present invention provides a method for producing the above-mentioned dust-free paper of the present invention, which comprises the steps of:

(1) forming a bottom layer fiber net: mixing 45-75 parts of fluff pulp fibers, 10-45 parts of lyocell short fibers and 10-15 parts of hot-melt short fibers in parts by dry weight, scattering fiber-containing airflow through an air inlet, keeping the airflow in a floating state, and falling and adsorbing the airflow onto a forming net through a forming head under the action of vacuum suction under the forming net to form a dust-free paper bottom layer fiber net;

(2) forming a middle layer fiber net: mixing 70-85 parts of fluff pulp fibers and 15-30 parts of hot-melt short fibers in parts by dry weight, adding 5-10 parts of a high-molecular water-absorbent resin material, scattering fiber-containing airflow through an air inlet, keeping the fiber-containing airflow in a floating state, and allowing the fiber-containing airflow to fall through a forming head and be adsorbed onto a dust-free paper bottom layer fiber web of a forming net under the action of vacuum suction to form a dust-free paper middle layer fiber web;

(3) forming a top layer web: mixing 45-75 parts of fluff pulp fibers, 10-45 parts of lyocell short fibers and 10-15 parts of hot-melt short fibers in parts by dry weight, scattering a fiber-containing airflow through an air inlet, keeping the airflow in a floating state, and allowing the airflow to fall through a forming head under the action of vacuum suction and be adsorbed onto a dust-free paper middle layer web of a forming net to form a dust-free paper top layer web;

(4) compacting: compacting the web formed in at least one of steps (1) - (3);

(5) hot melting: conveying the fiber web compacted in the step (4) to a hot melting oven, and heating the fiber web in the hot melting oven by hot air to melt and flow the surface of the hot-melt short fibers and form heat bonding points with other cellulose fibers so as to form paper with certain strength;

(6) surface sizing: sizing the surface of the paper obtained in the step (5) to enable the adhesive to be uniformly coated on the surface of the paper, and drying the paper by hot air to enable the adhesive to be bonded on the surface of the paper;

(7) puffing: the paper obtained in the step (6) enters an expansion box with higher temperature, and then enters a room temperature state, the high temperature difference enables the fiber to be rapidly expanded, and the paper becomes expanded;

(8) shaping: conveying the paper obtained in the step (7) to a cooling system, and carrying out surface treatment and sizing to obtain the dust-free paper;

the hot-melt short fiber used in the method is a PE/PP bi-component sheath-core structure composite fiber, after the fiber is subjected to hot-melt treatment, one part of the sheath layer is melted to play a role in bonding, and the rest of the sheath layer still keeps a fiber state.

Preferably, in the above method, in steps (1) to (3) of forming the web, the fiber-containing gas stream is introduced through the gas inlet into the counter-rotating breaker roll to break the fibers apart. Further preferably, the fibers are dispersed in an individual state. It will be understood by those skilled in the art that the reference to top and bottom layers in steps (1) - (3) is a relative term.

In the compacting step (4) of the above method, the fiber webs obtained in the steps (1) to (3) forming the fiber web may be sequentially compacted, or only the fiber web obtained in the step (3) may be compacted. The compaction may be carried out at ambient temperature or may be carried out under heat, for example at a temperature above ambient temperature below the heat-melting temperature of the heat-fusible short fibres, for example at a temperature of from 40 to 80 ℃.

In the hot-melting step (5) of the above method, the temperature of the hot air to be used is preferably controlled to be between 135 ℃ and 155 ℃.

In the surface sizing step (5) of the above method, the binder used is an ethylene-vinyl acetate copolymer, i.e., an EVA latex. Preferably, the surface sizing is a surface foam sizing mode, namely, the ethylene-vinyl acetate copolymer generates a foam group between two sizing rollers under the action of a foaming agent, so that the foam group is uniformly coated on the surface of the paper, and the foam group is dried by hot air and bonded on the surface of the paper.

The above method may further comprise other suitable processing steps, such as a calendering step after the sizing step (8).

The dust-free paper is comprehensive dust-free paper, has the characteristics of high hygroscopicity, high wet strength, good flexibility, high bulkiness, no dust falling and the like, is particularly suitable for makeup removing towels, and has small change of dry strength and wet strength.

Compared with the prior art, the invention mainly has the following beneficial effects:

A. the cleansing dust-free paper has safe and reliable components, the main fiber raw material is derived from natural plant fiber materials, and the used SAP is a novel functional polymer material, so that the SAP has no stimulation and harm to human skin;

B. the cleansing dust-free paper has good permeability and liquid absorption performance; after absorbing water, the strength of the fiber still remains about 80 percent, and the fiber is not dissociated;

C. the dustless paper for makeup removal is soft and bulky, and the bulkiness of the dustless paper is 3-5 times that of common household paper under the same weight; the surface sizing reduces dust and improves the tensile strength of the product;

D. the dust-free paper for makeup removal has good makeup removal force, is soaked by clear water when in use, and then is lightly wiped to remove the makeup on the face, so that the face makeup remover is simple and convenient;

E. the dustless paper outer package for makeup removal is like a wet tissue package, is easy to store and convenient to carry.

The present invention will be further described with reference to specific embodiments, but these embodiments are only illustrative of certain specific embodiments of the present invention and are not intended to limit the present invention.

Detailed Description

The general process flow for preparing the comprehensive dustless paper for makeup removal comprises the following steps:

fluff pulp fiber scattering → lyocell short fiber, hot melt short fiber loose, metering → adding SAP → fluff fiber, lyocell short fiber and hot melt short fiber mixing → air laying forming → forming net conveying → pressing → hot melt oven heating → surface coating → puffing box → cooling treatment and calendaring treatment → coiling into coil. Specifically, the process and control points for preparing the dust-free paper of the invention are as follows:

i. the fluff pulp fiber is broken up into single fiber in a crusher, meanwhile, the lyocell short fiber and the hot-melt short fiber are also opened and thrown in, and are measured according to the required proportion; adding SAP, and simultaneously mixing fluff pulp fiber, lyocell short fiber and hot-melt short fiber uniformly in a mixing box; the fiber entering amount is controlled by a controllable motor to control the quantitative amount of the final product to be 120-180g/m²；

ii. Respectively sending the materials to each forming head of a forming system through a feeding fan, and enabling the material quantity of each forming head to be the same as much as possible; according to the preset measurement, respectively controlling the raw materials entering the bottom layer forming head to form the bottom layer, controlling the raw materials entering the middle layer forming head to form the middle layer and controlling the raw materials entering the top layer forming head to form the top layer;

and iii, the forming system consists of a plurality of forming heads, the airflow containing the fibers is introduced into a scattering roller with opposite rotation directions through an air inlet to scatter the fibers and keep the fibers in a floating state, and the scattered single fibers uniformly fall through the forming heads under the action of vacuum suction under the forming net and are adsorbed on the forming net to sequentially form a bottom layer fiber net, a middle layer fiber net and a top layer fiber net. In the process, the layering and the padding performance of the finished paper can be improved by adopting a plurality of forming heads, and the SAP can be concentrated in the core layer of the paper sheet, so that the SAP in the produced finished paper cannot easily fall off;

iv, the initial fiber web (web for short) is formed by fiber disordered settlement without any strength, and the fiber web can obtain some initial strength by passing through a pair of compression rollers while conveying the fiber web; in some cases, hot embossing may be used to further improve the strength and surface condition of the web;

v, conveying the fiber web to a hot melting oven, heating the fiber web by hot air at the temperature of 135-155 ℃, drying and curing the fiber web in the oven, melting and flowing the surface of the hot melting fiber, and forming thermal bonding points with other cellulose fibers so as to form paper with certain strength;

vi, after the paper obtains enough high strength, adopting a surface foam sizing mode. Namely, the latex generates a foam group between the two applicator rolls under the action of a foaming agent, so that the EVA latex is uniformly coated on the surface of paper, and is dried by hot air in two drying cylinders, and the latex is adhered on the surface of a product. The process is used for reducing the phenomenon of dust-free paper hair falling caused by the loose property of wood pulp;

vii, after the drying is finished, the paper enters a puffing box with higher temperature, then enters a room temperature state, the high temperature difference enables the fiber to be rapidly puffed, the paper sheet becomes puffed, and meanwhile, the latex is further cured in the puffing box, so that the paper web does not become crisp and hard;

viii, conveying the dust-free paper to a cooling system, and performing surface treatment and shaping on the finished paper, so that the stiffness and strength of the paper web are improved; then, carrying out calendaring treatment to further improve the surface condition of the paper; and finally, rolling the finished paper web into a paper roll with a certain size through a rolling device and storing the paper roll.

The fluff pulp fiber used in the above process is purchased from Shandong Jialin International trade development Co., Ltd or Shandong daoxin New Material Co., Ltd; lyocell staple fibers used were purchased from lanine fibers (shanghai) ltd (lanine group); the hot-melt short fibers are purchased from Zhejiang New dimension lion synthetic fiber company, Inc. or Ningbo far east composite fiber company, Inc.; the high molecular water-absorbing resin (SAP) is purchased from New Zea grass science and technology (Shanghai) Co., Ltd or Ming dynasty chemical Co., Ltd, Ningchu.

Example 1

The dust-free paper was produced in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 60 parts of fluff pulp fibers, 30 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 75 parts of fluff pulp fibers, 20 parts of heat-fusible staple fibers and 5 parts of a polymeric water-absorbent resin material, and the raw materials of the top layer were controlled to include 60 parts of fluff pulp fibers, 30 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, in parts by dry weight.

Example 2

The dust-free paper was prepared in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 50 parts of fluff pulp fibers, 20 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 70 parts of fluff pulp fibers, 15 parts of heat-fusible staple fibers and 5 parts of a polymeric water-absorbent resin material, and the raw materials of the top layer were controlled to include 50 parts of fluff pulp fibers, 20 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, in parts by dry weight.

Example 3

The dust-free paper was produced in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 70 parts of fluff pulp fibers, 40 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 85 parts of fluff pulp fibers, 30 parts of heat-fusible staple fibers and 10 parts of a high-molecular water-absorbent resin material, and the raw materials of the top layer were controlled to include 70 parts of fluff pulp fibers, 40 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, on a dry weight basis.

Example 4

The dust-free paper was prepared in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 45 parts of fluff pulp fibers, 10 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 85 parts of fluff pulp fibers, 30 parts of heat-fusible staple fibers and 10 parts of a high molecular water-absorbent resin material, and the raw materials of the top layer were controlled to include 45 parts of fluff pulp fibers, 10 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, on a dry weight basis.

Example 5

The dust-free paper was produced in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 75 parts of fluff pulp fibers, 45 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 70 parts of fluff pulp fibers, 15 parts of heat-fusible staple fibers and 5 parts of a high-molecular water-absorbent resin material, and the raw materials of the top layer were controlled to include 75 parts of fluff pulp fibers, 45 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, on a dry weight basis.

Example 6

The dust-free paper was produced in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 60 parts of fluff pulp fibers, 30 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 80 parts of fluff pulp fibers, 25 parts of heat-fusible staple fibers and 8 parts of a high-molecular water-absorbent resin material, and the raw materials of the top layer were controlled to include 45 parts of fluff pulp fibers, 20 parts of lyocell staple fibers and 12 parts of heat-fusible staple fibers, in parts by dry weight.

Example 7

The dust-free paper was produced in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 45 parts of fluff pulp fibers, 10 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 75 parts of fluff pulp fibers, 20 parts of heat-fusible staple fibers and 10 parts of a high-molecular water-absorbent resin material, and the raw materials of the top layer were controlled to include 75 parts of fluff pulp fibers, 35 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, in parts by dry weight.

Example 8

The dust-free paper was produced in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 55 parts of fluff pulp fibers, 20 parts of lyocell staple fibers and 12 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 80 parts of fluff pulp fibers, 20 parts of heat-fusible staple fibers and 12 parts of a high molecular water-absorbent resin material, and the raw materials of the top layer were controlled to include 75 parts of fluff pulp fibers, 35 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, on a dry weight basis.

Example 9

The dust-free paper was prepared in the above-described procedure and control points, wherein in step ii, the raw materials of the bottom layer were controlled to include 65 parts of fluff pulp fibers, 20 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, the raw materials of the middle layer were controlled to include 75 parts of fluff pulp fibers, 15 parts of heat-fusible staple fibers and 10 parts of a high molecular water-absorbent resin material, and the raw materials of the top layer were controlled to include 65 parts of fluff pulp fibers, 20 parts of lyocell staple fibers and 15 parts of heat-fusible staple fibers, on a dry weight basis.

Claims

1. A dust-free paper comprises 20-60 parts of a top layer, 20-60 parts of a middle layer and 20-60 parts of a bottom layer in parts by dry weight; wherein the raw materials of the bottom layer comprise 50 parts of fluff pulp fibers, 20 parts of lyocell short fibers and 10 parts of hot-melt short fibers; the raw materials of the middle layer comprise 70 parts of fluff pulp fibers, 15 parts of hot-melt short fibers and 5 parts of high-molecular water-absorbent resin materials; the material of the top layer comprises 50 parts of fluff pulp fibers, 20 parts of lyocell staple fibers and 10 parts of heat-fusible staple fibers;

before hot melting treatment, the hot-melt short fiber is a PE/PP bi-component sheath-core structure composite fiber, after the hot melting treatment, one part of the sheath layer is melted to play a role in bonding, and the rest of the sheath layer still keeps a fiber state;

wherein the outer surface of the top layer and the outer surface of the bottom layer are both coated with an adhesive; the adhesive is an ethylene-vinyl acetate copolymer, and the content of ethylene and vinyl acetate is 60: 40;

the preparation method of the dust-free paper comprises the following steps:

i. fluff is mixedThe pulp fibers are broken up into single fibers in a crusher, meanwhile, the lyocell short fibers and the hot-melt short fibers are also opened and thrown in, and the pulp fibers are measured according to the required proportion; adding SAP, and simultaneously mixing fluff pulp fiber, lyocell short fiber and hot-melt short fiber uniformly in a mixing box; the fiber entering amount is controlled by a controllable motor to control the quantitative amount of the final product to be 120-180g/m²；

iii, the forming system consists of a plurality of forming heads, the airflow containing the fibers is introduced into a scattering roller with opposite rotation directions through an air inlet to scatter the fibers and keep the fibers in a floating state, and the scattered single fibers uniformly fall through the forming heads under the action of vacuum suction under the forming net and are adsorbed on the forming net to sequentially form a bottom layer fiber net, a middle layer fiber net and a top layer fiber net;

iv, the initial web is formed by the unordered settling of the fibers without any strength, and the web is conveyed while passing through a pair of pressure rollers so that the web acquires some initial strength;

vi, after the paper obtains certain strength, adopting a surface foam sizing mode; namely, under the action of a foaming agent, the latex generates a foam group between two applicator rolls, so that the EVA latex is uniformly coated on the surface of paper, and is dried by hot air in two drying cylinders, and the latex is adhered on the surface of a product;

2. A makeup remover using the dust-free paper as set forth in claim 1.

3. The makeup remover according to claim 2, wherein the makeup remover is a makeup removing towel.