CN113576945A - Waterproof breathable film and processing technology thereof - Google Patents

Waterproof breathable film and processing technology thereof Download PDF

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Publication number
CN113576945A
CN113576945A CN202110882690.8A CN202110882690A CN113576945A CN 113576945 A CN113576945 A CN 113576945A CN 202110882690 A CN202110882690 A CN 202110882690A CN 113576945 A CN113576945 A CN 113576945A
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Prior art keywords
film
plastic film
waterproof breathable
skin care
transparency
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CN202110882690.8A
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Chinese (zh)
Inventor
向小玲
熊泽宣喜
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Jiangsu Suishi Technology Co ltd
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Jiangsu Suishi Technology Co ltd
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Priority to CN202110882690.8A priority Critical patent/CN113576945A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8141—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
    • A61K8/8147—Homopolymers or copolymers of acids; Metal or ammonium salts thereof, e.g. crotonic acid, (meth)acrylic acid; Compositions of derivatives of such polymers
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/02—Cosmetics or similar toiletry preparations characterised by special physical form
    • A61K8/0208—Tissues; Wipes; Patches
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/31—Hydrocarbons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/30—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds
    • A61K8/33—Cosmetics or similar toiletry preparations characterised by the composition containing organic compounds containing oxygen
    • A61K8/36—Carboxylic acids; Salts or anhydrides thereof
    • A61K8/361—Carboxylic acids having more than seven carbon atoms in an unbroken chain; Salts or anhydrides thereof
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/81—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
    • A61K8/8123—Compositions of homopolymers or copolymers of compounds having one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers, e.g. PVC, PTFE
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/72—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds
    • A61K8/84—Cosmetics or similar toiletry preparations characterised by the composition containing organic macromolecular compounds obtained by reactions otherwise than those involving only carbon-carbon unsaturated bonds
    • A61K8/89—Polysiloxanes
    • A61K8/891—Polysiloxanes saturated, e.g. dimethicone, phenyl trimethicone, C24-C28 methicone or stearyl dimethicone
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
    • A61K8/97—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution from algae, fungi, lichens or plants; from derivatives thereof
    • A61K8/9783—Angiosperms [Magnoliophyta]
    • A61K8/9789—Magnoliopsida [dicotyledons]
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K8/00—Cosmetics or similar toiletry preparations
    • A61K8/18—Cosmetics or similar toiletry preparations characterised by the composition
    • A61K8/96—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution
    • A61K8/98—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution of animal origin
    • A61K8/981—Cosmetics or similar toiletry preparations characterised by the composition containing materials, or derivatives thereof of undetermined constitution of animal origin of mammals or bird
    • A61K8/982—Reproductive organs; Embryos, Eggs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61Q—SPECIFIC USE OF COSMETICS OR SIMILAR TOILETRY PREPARATIONS
    • A61Q19/00—Preparations for care of the skin
    • A61Q19/008—Preparations for oily skin
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/36—After-treatment
    • C08J9/365—Coating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08J2427/06—Homopolymers or copolymers of vinyl chloride
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2467/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/01—Hydrocarbons
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K5/00—Use of organic ingredients
    • C08K5/04—Oxygen-containing compounds
    • C08K5/05—Alcohols; Metal alcoholates
    • C08K5/053—Polyhydroxylic alcohols

Abstract

The invention discloses a waterproof breathable film, and particularly relates to the technical field of makeup oil absorption films, wherein the waterproof breathable film comprises the following raw materials in parts by weight: high transparent thermoplastic resin, filler and additive. The high-transparency thermoplastic resin is used as a main raw material, the high-transparency thermoplastic resin is a mixture of polyvinyl chloride resin and modified polypropylene resin, the polypropylene resin is modified by a coupling agent and zirconium stearate, the toughness of the polypropylene resin is improved, the crystallinity of the polypropylene resin can be reduced, the polyvinyl chloride resin is modified by blending, the transparency of the plastic film can be better, the polypropylene resin is not easy to damage in the using process, the crystallinity of the polypropylene resin can be reduced by extruding and blowing the film by a water quenching method during film forming, the transparency is improved, the plastic film after the stretching treatment shows opacity due to light diffusion, but can prevent light diffusion after absorbing sebum, so that the plastic film shows transparency, the definite grease absorption effect of a user is better, and the satisfaction degree of the user is improved.

Description

Waterproof breathable film and processing technology thereof
Technical Field
The invention relates to the technical field of makeup oil absorption films, in particular to a waterproof breathable film and a processing technology thereof.
Background
Various types of oil-absorbing cosmetic sheets are conventionally used to wipe sebum exuded from the face (particularly the nose, cheeks, forehead and the middle of the forehead), keep the face clean, and provide good applicability and spreadability (spreadability) of cosmetics. Conventional oil absorbing papers on the market are papers made using vegetable fibers such as hemp fibers or synthetic pulp. Such oil-absorbing paper has high oil absorption, but also highly irritates the skin due to the hardness and surface roughness of the fibers. To reduce skin irritation, paper is calendered or coated with an inorganic powder (e.g., calcium carbonate powder) along with a sizing agent during manufacture. However, calendering has the problem that the fibers may bulge with age and may again irritate the skin. The coating has a problem that the sebum absorbing ability is reduced due to the surface of the paper covered with the sizing agent.
In order to improve sebum absorbability, inorganic filler is added into pulp raw material containing plant fiber as main ingredient to prepare paper material, and the paper material is processed into paper with tightness (g/cm)2) The paper sheet having a paper thickness of 0.7 or more is effective in reducing irritation to the skin when used. However, there is a limit to the improvement of the absorption of sebum by these oil-absorbing papers, and there is a problem that the wiping effect cannot be easily and accurately confirmed in the state of absorption of sebum by these oil-absorbing papers when they are used. Moreover, the wiping effect is less easy when the face sebum of the user is lessAnd judging to provide unsatisfactory experience for the user. In addition, the existing oil absorption paper is caused by paper made of thin fiber materials, so that a user is easy to damage the oil absorption paper in the process of wiping off sebum parts from the face of the user, and the oil absorption paper has low toughness and cannot meet the use requirements of people. When the oil absorption paper is used in summer or in a warm air chamber, a user can easily sweat, the existing oil absorption paper cannot be matched with a large amount of sweat on the surface of the skin for absorption, and sebum components are always dissolved into the residual sweat, so that the oil absorption paper cannot be well adapted to cosmetics.
Disclosure of Invention
In order to overcome the above defects in the prior art, embodiments of the present invention provide a waterproof breathable film and a processing process thereof, and the problems to be solved by the present invention are: how to improve the fat absorption of the cosmetic paper can clearly confirm the fat absorption effect, absorb a large amount of facial sweat and sebum components dissolved in the facial sweat, and improve the toughness of the oil absorption paper.
In order to achieve the purpose, the invention provides the following technical scheme: a waterproof breathable film comprises the following raw materials in percentage by weight: 65-75% of high-transparency thermoplastic resin, 15-40% of filler and 3-8% of additive.
In a preferred embodiment, the composition comprises the following raw materials in percentage by weight: 68-72% of high-transparency thermoplastic resin, 17-28% of filler and 5-7% of additive.
In a preferred embodiment, the composition comprises the following raw materials in percentage by weight: 70% of high-transparency thermoplastic resin, 24% of filler and 6% of additive.
In a preferred embodiment, the highly transparent thermoplastic resin is a mixture of a polyvinyl chloride resin and a modified polypropylene resin, and the weight ratio of the polyvinyl chloride resin to the modified polypropylene resin is 1: (2-3), the filler is one of mineral oil, glycerin, petroleum jelly and low molecular weight polyester, the additive comprises an organic core agent, a surfactant and a spice, the organic core agent is one of carboxylic acid, sulfonic acid, phosphoric acid or organic alcohol, and the weight ratio of the organic core agent to the surfactant to the spice is 1: (0.3-0.6): (0.1-0.4).
The invention also provides a processing technology of the waterproof breathable film, which comprises the following specific preparation steps:
the method comprises the following steps: adding a coupling agent and zirconium stearate into the weighed polypropylene resin, uniformly stirring and mixing, introducing into a double-screw extruder, heating, melting, granulating, extruding, cooling, blending with polyvinyl chloride resin to obtain high-transparency thermoplastic resin, adding the weighed high-transparency thermoplastic resin, a filler and an additive into a reaction container, melting, blending, and processing by a film forming method to obtain a plastic film after blending is finished;
step two: carrying out biaxial extension treatment on the plastic film obtained in the step one, carrying out longitudinal extension on the plastic film by changing the peripheral speed of a driving roller, and mechanically stretching the plastic film transversely by grabbing the left end and the right end of the plastic film by using a chuck to carry out width extension on the plastic film, thus obtaining a microporous plastic film after extension treatment;
step three: and (4) coating a skin care absorbent on the porous plastic film obtained in the step two, and then drying to obtain the waterproof breathable film.
In a preferred embodiment, the first step is melt-kneaded by using a twin-shaft kneader, and the first film-forming method is a blown film method, a solution film method or a water-quenched extrusion blown film method.
In a preferred embodiment, the stretching ratio of the plastic film in the biaxial stretching treatment in the second step is 1.5 to 3.0, the thickness of the porous plastic film obtained in the second step is 5 to 200um, the porosity is 5 to 50%, the pore diameter of each pore is 0.2 to 5um, and the void volume of the porous plastic film is 0.0005 to 0.005cm3If the draw ratio of the plastic film during biaxial drawing treatment is less than 1.5, a sufficient void ratio cannot be obtained due to liposuction, whereas if it exceeds 3.0, the number of holes becomes too large and the amount of liposuction becomes too large; if the pore diameter is less than 0.2. mu.m, the sebum component required for transparentization cannot be absorbed, whereas if it exceeds 5 μm, the liposuction amount becomes too large; void volume below 0.0005cm3It is difficult for the user to take the fat-absorbing tablet, and conversely, it exceeds 0.005cm3If the amount of liposuction is too large, it is difficult to clearly confirm the liposuction effect; if the thickness of the apertured plastic filmWhen the thickness is less than 5 μm, the amount of liposuction decreases, and the porous plastic film adheres to a portion where facial liposuction is unnecessary, and handling becomes difficult, and when the thickness exceeds 200 μm, the amount of liposuction becomes excessive; if the porosity is less than 5%, the liposuction amount is decreased, and if it exceeds 50%, the liposuction amount is too large, and it is difficult to clearly confirm the liposuction effect, and the calculation formula of the void volume per unit area is:
the void volume per unit area [ thickness (cm) × 1(cm) × 1(cm) × porosity (%) ] ÷ 100.
In a preferred embodiment, the skin care absorbent in step three comprises a liquid absorbent, a solvent and a skin care lotion, the liquid absorbent is one of an anionic surfactant, a nonionic surfactant, a cationic surfactant or a hydrophilic polymer, the anionic surfactant is one of alkyl sulfate, alkylbenzene sulfonate and polyoxyethylene alkyl phosphate, the nonionic surfactant is one of polyoxyethyne alkyl ethyl ether, ethyl acetate, polyoxyethyne sorbate and sorbitol fatty acid ester, the cationic surfactant is an alkyl amine salt or a quaternary ammonium salt, the hydrophilic polymer is one of polyvinyl alcohol, polyethylene glycol and polypropylene glycol, the solvent is one of isopropanol, ethanol, water, methyl ethyl ketone, toluene, ethyl acetate and heptane, the skin care lotion is a mixture of hydrophilic silicone oil emulsion, umbilical cord tissue extract and towel gourd water, and the processing method of the skin care absorbent is as follows: dissolving the liquid absorbing substance in solvent, adding skin care liquid, and stirring.
In a preferred embodiment, the method for coating the skin care absorbent in the third step is gravure coating, elastic coating, net coating, dip coating or spray coating, and the skin care absorbent is coated on the porous plastic film in an amount of 0.3-3g/cm2The surface tension of the aqueous solution of the skin care absorbent distributed on the surface of the porous plastic film in the third step is 18.0 to 36.0dyn/cm, and the liquid absorption capacity of the waterproof breathable film is 0.00008 to 0.005cm per unit area under the condition that the water absorption capacity of the film is expressed3。
In a preferred embodiment, the porous plastic film is coated by one-side coating or two-side coating in the third step, and the liquid absorbing material and the skin care lotion are respectively coated on two sides of the plastic film by spray coating in the one-side coating.
The invention has the technical effects and advantages that:
1. the cosmetic waterproof breathable film prepared by adopting the raw material formula adopts high-transparency thermoplastic resin as a main raw material, is added with filler and additive, adopts the high-transparency thermoplastic resin as a mixture of polyvinyl chloride resin and modified polypropylene resin, is modified by a coupling agent and zirconium stearate, can reduce the crystallinity of the polypropylene resin while improving the toughness of the polypropylene resin, utilizes the polyvinyl chloride resin for blending modification, can ensure that the transparency of the plastic film is better, is not easy to damage in the using process, adopts a water quenching method to extrude and blow the film during film formation, can reduce the crystallinity of the polypropylene resin and improve the transparency, and the plastic film after the extension treatment shows opacity due to the diffusion of light, but can prevent the diffusion of light after absorbing sebum, so that the plastic film shows transparency, and a user clearly has better grease absorption effect, the satisfaction degree of a user is improved; the plastic film is coated with the skin care absorbent or the main raw material is added with the liquid absorbing substance and the skin care liquid, so that the hydrophilicity of the surface of the plastic film can be improved, sweat on the face of a user and sebum components dissolved in the sweat can be absorbed, the cosmetic has better application effect, and the skin care liquid absorbing agent is added, so that the moisturizing and skin care effect can be achieved in the process of wiping the user by the user and absorbing the oil;
2. the filler is added into the main raw material, the filler can endow fine vacancies to the plastic film produced by the main raw material, and then the biaxial extension treatment is carried out, so that the porosity of the plastic film after the extension treatment is 5-50%, the aperture of each vacancy is 0.2-0.5um, and the void volume is 0.0005-0.005cm3The plastic film after the extension treatment has a better liposuction effect, and the waterproof breathable film can be changed from opaque to transparent when the liposuction is more, so that the satisfaction degree of a user is improved.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention provides a waterproof breathable film which comprises the following raw materials in percentage by weight: 70% of high-transparency thermoplastic resin, 25% of filler and 5% of additive.
In a preferred embodiment, the highly transparent thermoplastic resin is a mixture of a polyvinyl chloride resin and a modified polypropylene resin, and the weight ratio of the polyvinyl chloride resin to the modified polypropylene resin is 1: 2.5, the filler is mineral oil, the additive comprises an organic core agent, a surfactant and a spice, the organic core agent is carboxylic acid, and the weight ratio of the organic core agent to the surfactant to the spice is 1: 0.5: 0.2.
the invention also provides a processing technology of the waterproof breathable film, which comprises the following specific preparation steps:
the method comprises the following steps: adding a coupling agent and zirconium stearate into the weighed polypropylene resin, uniformly stirring and mixing, introducing into a double-screw extruder, heating, melting, granulating, extruding, cooling, blending with polyvinyl chloride resin to obtain high-transparency thermoplastic resin, adding the weighed high-transparency thermoplastic resin, a filler and an additive into a reaction container, melting, blending, and processing by a film forming method to obtain a plastic film after blending is finished;
step two: carrying out biaxial extension treatment on the plastic film obtained in the step one, carrying out longitudinal extension on the plastic film by changing the peripheral speed of a driving roller, and mechanically stretching the plastic film transversely by grabbing the left end and the right end of the plastic film by using a chuck to carry out width extension on the plastic film, thus obtaining a microporous plastic film after extension treatment;
step three: and (4) coating a skin care absorbent on the porous plastic film obtained in the step two, and then drying to obtain the waterproof breathable film.
In a preferred embodiment, the first step is melt-kneaded by using a twin-shaft kneader, and the first step is a film-forming method, which is extrusion blown film-forming by a water quenching method.
In a preferred embodiment, the length direction of the plastic film extends 1.8 times and the width direction of the plastic film extends 1.8 times during the biaxial stretching treatment in the second step, the thickness of the porous plastic film obtained in the second step is 0.0035cm, the porosity is 25%, the pore diameter of each pore is 2.5um, and the void volume of the porous plastic film is 0.000875cm3。
In a preferred embodiment, the skin care absorbent in step three comprises a liquid absorbent, a solvent and a skin care lotion, wherein the liquid absorbent is a nonionic surfactant, the nonionic surfactant is a sorbitol fatty acid ester, the solvent is isopropanol, the skin care lotion is a mixture of a hydrophilic silicone oil emulsion, an umbilical cord tissue extract and towel gourd water, and the weight ratio of the mixture of the hydrophilic silicone oil emulsion, the umbilical cord tissue extract and the towel gourd water is 1: 0.6:2.5, and the processing method of the skin care absorbent comprises the following steps: dissolving the liquid absorbing substance in solvent, adding skin care liquid, and stirring.
In a preferred embodiment, the method for coating the skin care absorbent in the step three is gravure coating, and the skin care absorbent is coated on the porous plastic film in an amount of 1.5g/cm2The surface tension of the aqueous solution of the skin care absorbent distributed on the surface of the porous plastic film in the third step is 22dyn/cm, and the liquid absorption capacity of the waterproof breathable film is 0.0015cm per unit area when the water absorption capacity of the film is expressed3。
Example 2:
different from example 1, in the second step of biaxial stretching treatment, the length direction of the plastic film was stretched 1.6 times and the width direction was stretched 1.6 times, and the thickness of the porous plastic film obtained in the second step was 0.0035cm, and the porosity was 20%And the aperture of each empty hole is 2.8um, and the void volume of the porous plastic film is 0.0007cm3。
Example 3:
different from examples 1 and 2, a waterproof and breathable film, wherein the length direction of the plastic film is extended by 2.4 times and the width direction of the plastic film is extended by 2.8 times during biaxial extension treatment in the second step, the thickness of the porous plastic film obtained in the second step is 0.005cm, the porosity is 75%, the pore diameter of each pore is 0.5um, and the void volume of the porous plastic film is 0.004cm3。
Example 4:
unlike examples 1 to 3, a waterproof breathable film was produced by kneading with a biaxial kneading machine during melt kneading in the first step, wherein the film forming method in the first step was an air blowing film forming method of forming a cylindrical film by blowing from a circular die, the plastic film extended 2.0 times in the longitudinal direction and 2.0 times in the width direction during biaxial stretching in the second step, and wherein the porous plastic film obtained in the second step had a thickness of 0.0075cm and a porosity of 20% and a pore diameter of each pore of 2.4 μm, and the porous plastic film had a void volume of 0.0015cm3。
Example 5:
unlike example 4, a waterproof breathable film was produced by kneading with a biaxial kneader in melt kneading in the first step, in which a film-forming method was used as a solution film-forming method in which a film was formed by pressing a female die onto a pitching roller, in the second step, the plastic film was stretched 1.8 times in the longitudinal direction and 2.7 times in the width direction in biaxial stretching treatment, and in the second step, the porous plastic film had a thickness of 0.011cm, a porosity of 84%, a pore diameter per pore of 0.2 μm, and a void volume of 0.00924cm3。
Example 6:
the invention provides a waterproof breathable film which comprises the following raw materials in percentage by weight: 70% of high-transparency thermoplastic resin, 23% of filler and 7% of additive.
In a preferred embodiment, the highly transparent thermoplastic resin is a mixture of a polyvinyl chloride resin and a modified polypropylene resin, and the weight ratio of the polyvinyl chloride resin to the modified polypropylene resin is 1: 2.5, the filler is mineral oil, the additive comprises an organic core agent, a surfactant, a perfume, a liquid absorbing substance and a skin moisturizer, the organic core agent is carboxylic acid, and the weight ratio of the organic core agent to the surfactant to the perfume to the liquid absorbing substance to the skin moisturizer is 1: 0.4: 0.2:4: 2.
the invention also provides a processing technology of the waterproof breathable film, which comprises the following specific preparation steps:
the method comprises the following steps: adding a coupling agent and zirconium stearate into the weighed polypropylene resin, uniformly stirring and mixing, introducing into a double-screw extruder, heating, melting, granulating, extruding, cooling, blending with polyvinyl chloride resin to obtain high-transparency thermoplastic resin, adding the weighed high-transparency thermoplastic resin, a filler and an additive into a reaction container, melting, blending, and processing by a film forming method to obtain a plastic film after blending is finished;
step two: and (3) carrying out biaxial extension treatment on the plastic film obtained in the step one, carrying out longitudinal extension on the plastic film by changing the peripheral speed of a driving roller, holding the left end and the right end of the plastic film by using chucks, mechanically stretching the plastic film transversely, and carrying out width extension on the plastic film to obtain the waterproof breathable film after the extension treatment.
In a preferred embodiment, the first step is melt-kneaded by using a twin-shaft kneader, and the first step is a film-forming method, which is extrusion blown film-forming by a water quenching method.
In a preferred embodiment, the length direction of the plastic film extends 1.8 times and the width direction of the plastic film extends 1.8 times during the biaxial stretching treatment in the second step, the thickness of the porous plastic film obtained in the second step is 0.0035cm, the porosity is 25%, the pore diameter of each pore is 2.5um, and the void volume of the porous plastic film is 0.000875cm3。
In a preferred embodiment, in the first step, the liquid absorbing substance is a nonionic surfactant, the nonionic surfactant is lauric acid dimethyl ethanolamine, the skin care lotion is a mixture of a hydrophilic silicone oil emulsion, an umbilical cord tissue extracting solution and towel gourd water, and the weight ratio of the mixture of the hydrophilic silicone oil emulsion, the umbilical cord tissue extracting solution and the towel gourd water is 1: 0.6:2.5.
In a preferred embodiment, the surface tension of the aqueous solution of the liquid-absorbent substance distributed on the surface of the water-repellent gas-permeable membrane in the second step is 25dyn/cm, and the liquid-absorbing capacity of the water-repellent gas-permeable membrane, expressed as the water absorption capacity of the membrane, is 0.0018cm per unit area3。
Example 7:
different from the embodiment 1, the waterproof breathable film has the advantages that in the third step, the mixture of the liquid absorbing substance and the solvent is coated on one side surface of the porous plastic film obtained in the second step by using a spray coating mode, and then the skin moisturizer is coated on the other side surface of the porous plastic film by using a spray coating mode.
Taking the waterproof breathable films prepared in the embodiments 1 to 7 as an experiment group 1, an experiment group 2, an experiment group 3, an experiment group 4, an experiment group 5, an experiment group 6 and an experiment group 7 respectively, then carrying out the performance tests of the grease absorption, the transparency after use and the hand feeling on the produced waterproof breathable films, cutting the obtained porous films into rectangles with the length of 9cm multiplied by the width of 6cm during the test, and manufacturing test films;
in the fat absorption test: after measuring the weight (mg) of the film, commercially available mineral oil was dipped in the film, left to stand for 1 minute, and then the oil remaining on the surface of the film was wiped off with a paper towel, and the weight (mg) of the sample film was measured again. The amount of fat absorption per unit area (mg/cm) was calculated from the change in weight of the film due to mineral oil immersion2) And the theoretical amount of fat absorption (amount of fat absorption when the gaps of the membrane are entirely filled with mineral oil, mg/cm)2)；
When the transparency is tested: the test was conducted by examining 20 panelists with a waterproof, breathable film as a cosmetic liposuction sheet. In the film after use, the film was excellent in transparency, and the film was excellent in transparency, indicating that the film had acceptable transparency and had no difference from the film;
when the hand feeling is tested: the test was conducted by examining 20 panelists with a waterproof, breathable film as a cosmetic liposuction sheet. In the film after use, the film had a very good tactile sensation, and a good tactile sensation, indicating acceptable tactile sensation to the skin, and not good tactile sensation to the skin;
water absorption test: after measuring the weight (mg) of the film, the film was immersed in tap water and left to stand for 1 minute, and the water remaining on the surface of the film was wiped off with a paper towel, and the weight (mg) of the sample film was measured again. The water absorption capacity per unit area (cm) was calculated from the change in weight of the film due to immersion in tap water3/cm2)；
The test results are shown in table one:
Figure BDA0003192921690000091
Figure BDA0003192921690000101
watch 1
As can be seen from the table I, the waterproof breathable films produced in the examples 1 and 2 of the present invention are very suitable as a cosmetic liposuction sheet, and have good transparency and good touch feeling after use; while the extension ratio of the plastic film is enlarged and the use effect is reduced in the embodiment 3, the embodiment 4 adopts a blowing film method to form the film, and the use effect is reduced under the conditions that the film extends by 2.0 times in the length direction and extends by 2.0 times in the width direction; example 5 a film was formed by a solution film-forming method, and the use effect was reduced when the film extended 1.8 times in the longitudinal direction and 2.7 times in the width direction; example 6 the liquid absorbent was added to the main raw material and the filler as raw materials, and the use effect was good when the liquid absorbent extended 1.8 times in the longitudinal direction and 1.8 times in the width direction; example 7 the liquid absorbing substance and the skin moisturizer were sprayed on both sides of the porous plastic film, respectively, and the use effect was good, the highly transparent thermoplastic resin was used as the main material, and the filler and the additive were added, and the highly transparent thermoplastic resin was used as the polyvinyl chloride resin and the modified polypropyleneThe polypropylene resin is modified by a coupling agent and zirconium stearate, the toughness of the polypropylene resin is improved, the crystallinity of the polypropylene resin can be reduced, polyvinyl chloride resin is used for blending modification, the transparency of a plastic film can be better, the plastic film is not easy to damage in the using process, a water quenching method is adopted for extrusion and film blowing during film forming, the crystallinity of the polypropylene resin can be reduced, the transparency is improved, the plastic film after extension treatment has opacity due to light diffusion, but can prevent light diffusion after absorbing sebum, the plastic film has transparency, a user can clearly absorb grease, and the satisfaction degree of the user is improved; the skin care absorbent is coated on the plastic film or the liquid absorbing substance and the skin care liquid are added into the main raw material, so that the hydrophilicity of the surface of the plastic film can be improved, sweat on the face of a user and sebum components dissolved in the sweat can be absorbed, the cosmetic has a better application effect, and the skin care liquid is added, so that the moisturizing and skin care effects can be achieved in the process of wiping the plastic film by the user and absorbing oil; the filler is added into the main raw material, so that the filler can endow fine vacancies to the plastic film produced by the main raw material, and then the plastic film is subjected to biaxial extension treatment, so that the porosity of the plastic film after the extension treatment is 5-50%, the pore diameter of each vacancy is 0.2-0.5um, and the void volume is 0.0005-0.005cm3The plastic film after the extension treatment has a better liposuction effect, and the waterproof breathable film can be changed from opaque to transparent when the liposuction is more, so that the satisfaction degree of a user is improved.
And finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims (10)

1. A waterproof breathable film is characterized in that: comprises the following raw materials in percentage by weight: 65-75% of high-transparency thermoplastic resin, 15-40% of filler and 3-8% of additive.
2. The waterproof breathable film of claim 1, wherein: comprises the following raw materials in percentage by weight: 68-72% of high-transparency thermoplastic resin, 17-28% of filler and 5-7% of additive.
3. The waterproof breathable film of claim 1, wherein: comprises the following raw materials in percentage by weight: 70% of high-transparency thermoplastic resin, 24% of filler and 6% of additive.
4. The waterproof breathable film of claim 1, wherein: the high-transparency thermoplastic resin is a mixture of polyvinyl chloride resin and modified polypropylene resin, and the weight ratio of the polyvinyl chloride resin to the modified polypropylene resin is 1: (2-3), the filler is one of mineral oil, glycerin, petroleum jelly and low molecular weight polyester, the additive comprises an organic core agent, a surfactant and a spice, the organic core agent is one of carboxylic acid, sulfonic acid, phosphoric acid or organic alcohol, and the weight ratio of the organic core agent to the surfactant to the spice is 1: (0.3-0.6): (0.1-0.4).
5. The process for producing a waterproof breathable film according to any one of claims 1 to 4, wherein: the preparation method comprises the following specific steps:
the method comprises the following steps: adding a coupling agent and zirconium stearate into the weighed polypropylene resin, uniformly stirring and mixing, introducing into a double-screw extruder, heating, melting, granulating, extruding, cooling, blending with polyvinyl chloride resin to obtain high-transparency thermoplastic resin, adding the weighed high-transparency thermoplastic resin, a filler and an additive into a reaction container, melting, blending, and processing by a film forming method to obtain a plastic film after blending is finished;
step two: carrying out biaxial extension treatment on the plastic film obtained in the step one, carrying out longitudinal extension on the plastic film by changing the peripheral speed of a driving roller, and mechanically stretching the plastic film transversely by grabbing the left end and the right end of the plastic film by using a chuck to carry out width extension on the plastic film, thus obtaining a microporous plastic film after extension treatment;
step three: and (4) coating a skin care absorbent on the porous plastic film obtained in the step two, and then drying to obtain the waterproof breathable film.
6. The process for manufacturing a waterproof breathable film according to claim 5, wherein the process comprises the following steps: and in the first step, a double-shaft mixing machine is adopted for mixing during melting and mixing, and the film forming method in the first step is a blowing film forming method, a solution film forming method or a water quenching method for extruding and blowing a film.
7. The process for manufacturing a waterproof breathable film according to claim 5, wherein the process comprises the following steps: the extension ratio of the plastic film during biaxial extension treatment in the second step is 1.5-3.0, the thickness of the porous plastic film obtained in the second step is 5-200um, the porosity is 5-50%, the pore diameter of each pore is 0.2-5um, and the void volume of the porous plastic film is 0.0005-0.005cm3。
8. The process for manufacturing a waterproof breathable film according to claim 5, wherein the process comprises the following steps: the skin care absorbent in the third step comprises a liquid absorbing substance, a solvent and a skin care lotion, wherein the liquid absorbing substance is one of an anionic surfactant, a nonionic surfactant, a cationic surfactant or a hydrophilic polymer, the anionic surfactant is one of alkyl sulfate, alkylbenzene sulfonate and polyoxyethylene alkyl phosphate, the nonionic surfactant is one of polyoxyethyne alkyl ether, ethyl acetate, polyoxyethyne sorbate and sorbitol fatty acid ester, the cationic surfactant is an alkylamine salt or a quaternary ammonium salt, the hydrophilic polymer is one of polyvinyl alcohol, polyethylene glycol and polypropylene glycol, the solvent is one of isopropanol, ethanol, water, methyl ethyl ketone, toluene, ethyl acetate and heptane, and the skin care lotion is a hydrophilic silicone oil emulsion, The skin care absorbent is a mixture of umbilical cord tissue extract and towel gourd water, and the processing method comprises the following steps: dissolving the liquid absorbing substance in solvent, adding skin care liquid, and stirring.
9. The process for manufacturing a waterproof breathable film according to claim 5, wherein the process comprises the following steps: the method for coating the skin care absorbent in the third step is gravure coating, elastic coating, net film coating, dip coating or spray coating, and the content of the skin care absorbent coated on the porous plastic film is 0.3-3g/cm2The surface tension of the aqueous solution of the skin care absorbent distributed on the surface of the porous plastic film in the third step is 18.0 to 36.0dyn/cm, and the liquid absorption capacity of the waterproof breathable film is 0.00008 to 0.005cm per unit area under the condition that the water absorption capacity of the film is expressed3。
10. The process for manufacturing a waterproof breathable film according to claim 8, wherein: and in the third step, the porous plastic film is coated by single-side coating or double-side coating, and the liquid absorbing substance and the skin care lotion are respectively coated on two sides of the plastic film in a spray coating mode when the single-side coating is carried out.
CN202110882690.8A 2021-08-02 2021-08-02 Waterproof breathable film and processing technology thereof Withdrawn CN113576945A (en)

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Application publication date: 20211102