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CN112721364A - Mildew-proof wear-resistant environment-friendly PVC artificial leather and preparation method thereof - Google Patents

Mildew-proof wear-resistant environment-friendly PVC artificial leather and preparation method thereof Download PDF

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Publication number
CN112721364A
CN112721364A CN202110076074.3A CN202110076074A CN112721364A CN 112721364 A CN112721364 A CN 112721364A CN 202110076074 A CN202110076074 A CN 202110076074A CN 112721364 A CN112721364 A CN 112721364A
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parts
artificial leather
pvc
vermiculite powder
pvc artificial
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Inventor
张惠良
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Jiaxing City Bo Er New Material Co ltd
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Jiaxing City Bo Er New Material Co ltd
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Priority to CN202110076074.3A priority Critical patent/CN112721364A/en
Publication of CN112721364A publication Critical patent/CN112721364A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B5/00Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/18Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by features of a layer of foamed material
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29BPREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B7/00Mixing; Kneading
    • B29B7/02Mixing; Kneading non-continuous, with mechanical mixing or kneading devices, i.e. batch type
    • B29B7/22Component parts, details or accessories; Auxiliary operations
    • B29B7/28Component parts, details or accessories; Auxiliary operations for measuring, controlling or regulating, e.g. viscosity control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34Auxiliary operations
    • B29C44/60Measuring, controlling or regulating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D7/00Producing flat articles, e.g. films or sheets
    • B29D7/01Films or sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B33/00Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18Manufacture of films or sheets
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0061Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0066Use of inorganic compounding ingredients
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/009Use of pretreated compounding ingredients
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0095Mixtures of at least two compounding ingredients belonging to different one-dot groups
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/06Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
    • C08J9/10Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
    • C08J9/102Azo-compounds
    • C08J9/103Azodicarbonamide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B32LAYERED PRODUCTS
    • B32BLAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2266/00Composition of foam
    • B32B2266/02Organic
    • B32B2266/0214Materials belonging to B32B27/00
    • B32B2266/0221Vinyl resin
    • B32B2266/0235Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00Foams characterized by the expanding agent
    • C08J2203/04N2 releasing, ex azodicarbonamide or nitroso compound
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00Characterised 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
    • C08J2327/02Characterised 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
    • C08J2327/04Characterised 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
    • C08J2327/06Homopolymers or copolymers of vinyl chloride
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2475/00Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2475/04Polyurethanes
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K13/00Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/02Elements
    • C08K3/04Carbon
    • C08K3/042Graphene or derivatives, e.g. graphene oxides
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/34Silicon-containing compounds
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00Use of pretreated ingredients
    • C08K9/02Ingredients treated with inorganic substances
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00Use of pretreated ingredients
    • C08K9/04Ingredients treated with organic substances
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08KUse of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K9/00Use of pretreated ingredients
    • C08K9/04Ingredients treated with organic substances
    • C08K9/06Ingredients treated with organic substances with silicon-containing compounds

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Synthetic Leather, Interior Materials Or Flexible Sheet Materials (AREA)

Abstract

The invention relates to a mildew-proof wear-resistant environment-friendly PVC artificial leather and a preparation method thereof, wherein the PVC artificial leather comprises a base cloth layer and a PVC surface layer attached to the base cloth layer, and the PVC surface layer is prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of functional elastomer, 50-70 parts of plasticizer, 12-20 parts of coconut shell powder modified vermiculite powder, 4-12 parts of cross-linking agent, 1-5 parts of heat stabilizer, 1-3 parts of antibacterial agent and 0.2-4 parts of foaming agent. Compared with the prior art, the PVC artificial leather does not contain any volatile solvent, is good in environmental protection, smooth in hand feeling, strong in three-dimensional sense, high in glossiness and quality, excellent in mildew-proof, antibacterial and abrasion-resistant scraping performance, plump in hand feeling like real leather, long in service life, capable of achieving the test standard in physical property, capable of effectively overcoming the problems of easy aging, easy mildew and peeling and the like of the existing PVC leather, and good in economic practicability.

Description

Mildew-proof wear-resistant environment-friendly PVC artificial leather and preparation method thereof
Technical Field
The invention belongs to the technical field of leather processing, and relates to mildew-proof wear-resistant environment-friendly PVC artificial leather and a preparation method thereof.
Background
Artificial leather, also known as imitation leather or rubber, is a plastic product that looks and feels like leather and can replace it. The artificial leather is usually manufactured by foaming or film-covering PVC or PU with different formulas on a textile fabric base or a non-woven fabric base, can be processed and manufactured according to the requirements of different strength, abrasion resistance, cold resistance, color, luster, pattern and the like, and has the characteristics of various patterns, good waterproof performance, neat margin, high utilization rate and low price compared with genuine leather.
At present, for the production of PVC artificial leather, the following problems mainly exist: firstly, because some processing aids (such as plasticizers) with certain volatility are required to be used in the processing process, the final PVC artificial leather product has certain unpleasant smell, the normal use of the product is influenced, and potential harm is caused to the health of a human body; secondly, the existing PVC artificial leather products mostly have the phenomena of poor wear resistance and aging resistance, poor waterproofness, obvious aging, abrasion, skin falling, mildew and the like after being used for a long time, not only seriously affect the aesthetic degree of the leather products, but also greatly shorten the service life of the products.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the mildew-proof wear-resistant environment-friendly PVC artificial leather and the preparation method thereof.
The purpose of the invention can be realized by the following technical scheme:
according to one aspect of the invention, the mildew-proof wear-resistant environment-friendly PVC artificial leather comprises a base cloth layer and a PVC surface layer attached to the base cloth layer, wherein the PVC surface layer is prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of functional elastomer, 50-70 parts of plasticizer, 12-20 parts of coconut shell powder modified vermiculite powder, 4-12 parts of cross-linking agent, 1-5 parts of heat stabilizer, 1-3 parts of antibacterial agent and 0.2-4 parts of foaming agent.
In one embodiment, the functional elastomer is a graphene oxide modified thermoplastic polyurethane elastomer, and the graphene oxide is added in an amount of 5 to 15wt% based on the mass of the thermoplastic polyurethane elastomer.
As an embodiment, the functional elastomer is prepared by a method comprising: preparing 2-5 wt% of graphene oxide aqueous suspension, adding an isocyanate modifier and thermoplastic polyurethane elastomer particles into the graphene oxide aqueous suspension, carrying out ultrasonic reaction for 2-4 h at 65-80 ℃ under 100-120 KHz, carrying out centrifugal separation, retaining solids, washing, drying, grinding until 95% of the solid particles pass through a 400-mesh sieve, and thus obtaining the functional elastomer.
Further, the amount of the isocyanate-based modifier added is 0.4 to 1.8% by weight based on the mass of the thermoplastic polyurethane elastomer.
Preferably, the isocyanate-based modifier is selected from any one of hexamethylene diisocyanate, diphenylmethane diisocyanate or dicyclohexylmethane diisocyanate.
Preferably, the thermoplastic polyurethane elastomer may be selected from commercially available Hytrel 5555HS, 5556, 6356 or 7246.
As an embodiment, the preparation method of the coconut shell powder modified vermiculite powder comprises the following steps:
step i): centrifugally separating the vermiculite powder soaked in the hydrogen peroxide solution, keeping solids, washing the solids to be neutral by using deionized water, and drying to prepare pretreated vermiculite powder;
step ii): adding coconut shell powder and a silane coupling agent into a mixed solution of methyl isobutyl ketone, isopropanol and N, N-dimethylformamide, adding the dried pretreated vermiculite powder at 80-95 ℃ while stirring, continuing to stir at a constant temperature for reaction for 1-2 hours after the addition is finished, filtering, retaining solids, washing, drying, grinding to 90%, and sieving with a 2000-mesh sieve to obtain the coconut shell powder modified vermiculite powder.
Preferably, the addition amount of the coconut shell powder is 10-20% of the mass of the pretreated vermiculite powder, the addition amount of the silane coupling agent is 1-5% of the mass of the pretreated vermiculite powder, and the silane coupling agent is any one of gamma- (2, 3-glycidoxy) propyl trimethoxy silane or gamma-aminopropyl triethoxy silane.
Preferably, the mass ratio of the methyl isobutyl ketone to the isopropanol to the N, N-dimethylformamide in the mixed solution is 1:2-4:1, and the mass concentration of the pretreated vermiculite powder in the mixed solution is 0.4-0.8 g/mL.
In one embodiment, the plasticizer is selected from at least one of an aliphatic dibasic acid ester plasticizer or an epoxy vegetable oil plasticizer.
As an embodiment, the crosslinking agent is selected from at least one of 1, 1-di (t-butylperoxy) cyclohexane, di (4-methylbenzoyl) peroxide, or dibenzoyl peroxide.
As an embodiment, the heat stabilizer is selected from at least one of calcium stearate, calcium ricinoleate, zinc stearate, barium stearate, or lanthanum stearate.
As an embodiment, the antibacterial agent is selected from any one of chitin, mustard, castor oil or horseradish.
As an embodiment, the blowing agent is an AC blowing agent.
According to another aspect of the present invention, there is provided a method for preparing the above-mentioned mildewproof, wear-resistant and environment-friendly PVC artificial leather, comprising the steps of:
step 1): adding the preparation raw materials of the PVC surface layer into a high-speed stirrer according to parts by weight, and carrying out high-speed mixing and stirring to obtain a mixture;
step 2): transferring the mixture prepared in the step 1) into an internal mixer for mixing, transferring into an open mill for plasticating after mixing is finished, and then conveying to a calender for calendering into a sheet;
step 3): and (3) attaching the sheet prepared in the step 2) to a base fabric layer to prepare a semi-finished product, and transferring the semi-finished product to a foaming embossing machine for foaming embossing treatment to prepare the PVC artificial leather.
Preferably, in the high-speed mixing and stirring in the step 1), the stirring temperature is 100-110 ℃, and the stirring time is 2-5 min.
Preferably, the mixing temperature in the step 2) is 120-140 ℃, and the plastication is performed by sequentially passing through two open mills and performing plastication under the temperature condition of 130-150 ℃.
Preferably, the temperature of the foaming embossing treatment in step 3) is 180-.
Compared with the prior art, the invention has the following characteristics:
1) the functional elastomer is introduced into the material system of the PVC artificial leather, and is a thermoplastic polyurethane elastomer modified by graphene oxide, because the surface of the graphene oxide has rich active functional groups, the graphene oxide is combined into the thermoplastic polyurethane elastomer by utilizing the isocyanate modifier, not only is beneficial to improving the compatibility between the thermoplastic polyurethane elastomer and the PVC base material, improves the dispersion uniformity of the thermoplastic polyurethane elastomer particles in the PVC base material, can effectively enhance the wear resistance and the scratch resistance of a material system, moreover, the introduction of the graphene oxide is beneficial to improving the flame retardance and aging resistance of the material system, and meanwhile, the graphene oxide can also have synergistic interaction with an antibacterial agent in the material system, the antibacterial and bacteriostatic effects can be played together, and the phenomenon that the surface of the artificial leather is easy to mildew in plum rain weather can be inhibited or prevented;
2) the coconut husk powder modified vermiculite powder is introduced into the material system of the PVC artificial leather, and because the coconut husk powder contains lignin and cellulose, the lignin and the cellulose contain rich aromatic ring structures, aliphatic and aromatic hydroxyl groups, quinone groups and other active groups, the lignin and the cellulose can be combined to the surface of the vermiculite powder through a silane coupling agent, the dispersibility of the vermiculite powder in a PVC base material can be improved, the agglomeration of vermiculite powder particles can be effectively prevented, the vermiculite powder modified by the coconut husk powder has outstanding adsorbability and antiseptic antibacterial property, the odor emission of the PVC artificial leather can be effectively inhibited, in addition, a stable cross-linked structure can be formed between the coconut husk powder modified vermiculite powder and a functional elastomer, and the strength and wear and scratch resistance of the material system can be obviously improved on the premise of keeping the flexibility of the material system;
3) the PVC artificial leather disclosed by the invention does not contain any volatile solvent, is good in environmental protection property, smooth in hand feeling, strong in three-dimensional sense, high in glossiness and quality, excellent in mildew-proof, antibacterial and abrasion-resistant performances, plump in hand feeling of a product like real leather, long in service life, and capable of effectively overcoming the problems of easiness in aging, easiness in mildew and peeling and the like of the conventional PVC leather, and has good economic practicability.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Further, in this document, it should be understood that where an available, suitable, etc. concentration range is listed or described, it is intended that any and every concentration within that range (including the endpoints) should be considered to have been stated. For example, "a range of from 1 to 10" should be understood to mean every and every possible number in succession between about 1 and about 10. Thus, even if specific data points within the range, or even no data points within the range, are explicitly identified or refer to only a few specific points, it is to be understood that any and all data points within the range are to be considered explicitly stated.
Although numerical ranges and parameters setting forth the broad scope of the invention are approximate, the values set forth in the specific examples are presented as precisely as possible. Any numerical value, however, inherently contains certain standard deviations found in their respective testing measurements. As used herein, "about" generally means that the actual value is within plus or minus 10%, 5%, 1%, or 0.5% of a particular value or range. Alternatively, the term "about" means that the actual value falls within the acceptable standard error of the mean, as considered by those skilled in the art. Except in the experimental examples, or where otherwise expressly indicated, it is to be understood that all ranges, amounts, values and percentages herein used (e.g., to describe amounts of materials, length of time, temperature, operating conditions, quantitative ratios, and the like) are to be modified by the word "about". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the specification and attached claims are approximations that may vary depending upon the desired properties sought to be obtained. At the very least, these numerical parameters are to be understood as meaning the number of significant digits recited and the number resulting from applying ordinary carry notation.
The present invention will be described in detail with reference to specific examples.
Example 1:
the mould-proof wear-resistant environment-friendly PVC artificial leather comprises a base cloth layer and a PVC surface layer attached to the base cloth layer, wherein the PVC surface layer is prepared from the following components in parts by weight: 100 parts of PVC resin, 20 parts of functional elastomer, 50 parts of plasticizer, 12 parts of coconut shell powder modified vermiculite powder, 4 parts of cross-linking agent, 1 part of heat stabilizer, 1 part of antibacterial agent and 0.2 part of foaming agent.
The functional elastomer used in this embodiment is a graphene oxide-modified thermoplastic polyurethane elastomer, and the amount of the added graphene oxide is 5wt% based on the mass of the thermoplastic polyurethane elastomer, and the specific preparation method is as follows: preparing a graphene oxide aqueous suspension with the content of 2wt%, adding an isocyanate modifier and thermoplastic polyurethane elastomer particles into the graphene oxide aqueous suspension, carrying out ultrasonic reaction for 4 hours at 65 ℃ and 100 KHz, carrying out centrifugal separation, retaining solids, washing, drying, grinding to 95%, and sieving with a 400-mesh sieve to obtain the functional elastomer.
In the process of preparing the functional elastomer, the preparation method of the graphene oxide water suspension comprises the following steps: fully grinding and dispersing graphene oxide and deionized water at the rotating speed of 30000 r/min for 30 min at the temperature of below 10 ℃, and then carrying out ultrasonic oscillation at the temperature of 50 ℃, wherein the frequency of the ultrasonic oscillation is controlled to be 75 kHz, and carrying out ultrasonic oscillation for 25 min to obtain the graphene oxide water suspension.
The adopted thermoplastic polyurethane elastomer is commercially available Hytrel 5555HS, the adopted isocyanate modifier is hexamethylene diisocyanate, and the using amount of the isocyanate modifier is 0.4 wt% of the mass of the thermoplastic polyurethane elastomer.
The coconut husk powder modified vermiculite powder used in the example is prepared by the following steps:
step i): centrifugally separating the vermiculite powder soaked in the hydrogen peroxide solution, keeping solids, washing the solids to be neutral by using deionized water, and drying to prepare pretreated vermiculite powder;
step ii): adding coconut shell powder and a silane coupling agent into a mixed solution of methyl isobutyl ketone, isopropanol and N, N-dimethylformamide, adding the dried pretreated vermiculite powder at 80 ℃ while stirring, continuing stirring at a constant temperature for reaction for 2 hours after the addition is finished, filtering, retaining solids, washing, drying, grinding to 90%, and sieving with a 2000-mesh sieve to obtain the coconut shell powder modified vermiculite powder.
In the process of preparing the coconut husk powder modified vermiculite powder, the addition amount of the coconut husk powder is 10 wt%, the addition amount of the silane coupling agent is 1 wt%, and the silane coupling agent is gamma-aminopropyltriethoxysilane; the hydrogen peroxide solution used in step i) was a 15wt% hydrogen peroxide solution, the mass ratio of methyl isobutyl ketone, isopropyl alcohol and N, N-dimethylformamide in the mixed solution used in step ii) was 1:2:1, and the mass concentration of the pretreated vermiculite powder in the mixed solution was 0.4 g/mL.
In this example, the plasticizer used was dioctyl phthalate, the crosslinking agent used was 1, 1-di (t-butylperoxy) cyclohexane, the heat stabilizer used was calcium stearate, the antibacterial agent used was chitin, and the foaming agent used was AC foaming agent.
Example 2:
the mould-proof wear-resistant environment-friendly PVC artificial leather comprises a base cloth layer and a PVC surface layer attached to the base cloth layer, wherein the PVC surface layer is prepared from the following components in parts by weight: 100 parts of PVC resin, 23 parts of functional elastomer, 57 parts of plasticizer, 15 parts of coconut shell powder modified vermiculite powder, 6 parts of cross-linking agent, 2 parts of heat stabilizer, 1 part of antibacterial agent and 1 part of foaming agent.
The functional elastomer used in the embodiment is a graphene oxide modified thermoplastic polyurethane elastomer, and the addition amount of graphene oxide is 7 wt% based on the mass of the thermoplastic polyurethane elastomer, and the specific preparation method comprises the following steps: preparing 4 wt% of graphene oxide aqueous suspension, adding an isocyanate modifier and thermoplastic polyurethane elastomer particles into the graphene oxide aqueous suspension, carrying out ultrasonic reaction for 3 hours at 76 ℃ and 110 KHz, carrying out centrifugal separation, retaining solids, washing, drying, grinding to 95%, and sieving with a 400-mesh sieve to obtain the functional elastomer.
In the process of preparing the functional elastomer, the preparation method of the graphene oxide water suspension comprises the following steps: fully grinding and dispersing graphene oxide and deionized water at the rotating speed of 30000 r/min for 30 min at the temperature of below 10 ℃, and then carrying out ultrasonic oscillation at the temperature of 50 ℃, wherein the frequency of the ultrasonic oscillation is controlled to be 75 kHz, and carrying out ultrasonic oscillation for 25 min to obtain the graphene oxide water suspension.
The adopted thermoplastic polyurethane elastomer is commercially available Hytrel 5556, the adopted isocyanate modifier is diphenylmethane diisocyanate, and the using amount of the isocyanate modifier is 0.8 wt% of the mass of the thermoplastic polyurethane elastomer.
The coconut husk powder modified vermiculite powder used in the example is prepared by the following steps:
step i): centrifugally separating the vermiculite powder soaked in the hydrogen peroxide solution, keeping solids, washing the solids to be neutral by using deionized water, and drying to prepare pretreated vermiculite powder;
step ii): adding coconut shell powder and a silane coupling agent into a mixed solution of methyl isobutyl ketone, isopropanol and N, N-dimethylformamide, adding the dried pretreated vermiculite powder at 89 ℃ while stirring, continuing stirring at a constant temperature for reaction for 2 hours after the addition is finished, filtering, retaining solids, washing, drying, grinding to 90%, and sieving with a 2000-mesh sieve to obtain the coconut shell powder modified vermiculite powder.
In the process of preparing the coconut husk powder modified vermiculite powder, the addition amount of the coconut husk powder is 15wt%, the addition amount of the silane coupling agent is 3 wt%, and the silane coupling agent is gamma-aminopropyltriethoxysilane; the hydrogen peroxide solution used in step i) was a 12wt% hydrogen peroxide solution, the mass ratio of methyl isobutyl ketone, isopropyl alcohol and N, N-dimethylformamide in the mixed solution used in step ii) was 1:3:1, and the mass concentration of the pretreated vermiculite powder in the mixed solution was 0.5 g/mL.
In this example, the plasticizer used was butyl epoxy oleate, the crosslinking agent used was bis (4-methylbenzoyl) peroxide, the heat stabilizer used was calcium castor oil, the antibacterial agent used was castor oil, and the foaming agent used was an AC foaming agent.
Example 3:
the mould-proof wear-resistant environment-friendly PVC artificial leather comprises a base cloth layer and a PVC surface layer attached to the base cloth layer, wherein the PVC surface layer is prepared from the following components in parts by weight: 100 parts of PVC resin, 26 parts of functional elastomer, 60 parts of plasticizer, 18 parts of coconut shell powder modified vermiculite powder, 10 parts of cross-linking agent, 4 parts of heat stabilizer, 2 parts of antibacterial agent and 3 parts of foaming agent.
The functional elastomer used in this embodiment is a graphene oxide-modified thermoplastic polyurethane elastomer, and the amount of the added graphene oxide is 10 wt% based on the mass of the thermoplastic polyurethane elastomer, and the specific preparation method is as follows: preparing 5wt% of graphene oxide aqueous suspension, adding an isocyanate modifier and thermoplastic polyurethane elastomer particles into the graphene oxide aqueous suspension, carrying out ultrasonic reaction for 2 hours at 80 ℃ and 120 KHz, carrying out centrifugal separation, retaining solids, washing, drying, grinding to 95%, and sieving with a 400-mesh sieve to obtain the functional elastomer.
In the process of preparing the functional elastomer, the preparation method of the graphene oxide water suspension comprises the following steps: fully grinding and dispersing graphene oxide and deionized water at the rotating speed of 30000 r/min for 30 min at the temperature of below 10 ℃, and then carrying out ultrasonic oscillation at the temperature of 50 ℃, wherein the frequency of the ultrasonic oscillation is controlled to be 75 kHz, and carrying out ultrasonic oscillation for 25 min to obtain the graphene oxide water suspension.
The adopted thermoplastic polyurethane elastomer is commercially available Hytrel 6356, the adopted isocyanate modifier is dicyclohexylmethane diisocyanate, and the using amount of the isocyanate modifier is 1.2 wt% of the mass of the thermoplastic polyurethane elastomer.
The coconut husk powder modified vermiculite powder used in the example is prepared by the following steps:
step i): centrifugally separating the vermiculite powder soaked in the hydrogen peroxide solution, keeping solids, washing the solids to be neutral by using deionized water, and drying to prepare pretreated vermiculite powder;
step ii): adding coconut shell powder and a silane coupling agent into a mixed solution of methyl isobutyl ketone, isopropanol and N, N-dimethylformamide, adding the dried pretreated vermiculite powder at 95 ℃ while stirring, continuing stirring at a constant temperature for reaction for 1 hour after the addition is finished, filtering, retaining solids, washing, drying, grinding to 90 percent, and sieving with a 2000-mesh sieve to obtain the coconut shell powder modified vermiculite powder.
In the process of preparing the coconut husk powder modified vermiculite powder, the addition amount of the coconut husk powder is 18 wt%, the addition amount of the silane coupling agent is 5wt%, and the silane coupling agent is gamma-aminopropyltriethoxysilane; the hydrogen peroxide solution used in step i) was a 15wt% hydrogen peroxide solution, the mass ratio of methyl isobutyl ketone, isopropyl alcohol and N, N-dimethylformamide in the mixed solution used in step ii) was 1:4:1, and the mass concentration of the pretreated vermiculite powder in the mixed solution was 0.6 g/mL.
In this example, the plasticizer used was a mixture of octyl epoxy oleate and n-butyl phthalate at a mass ratio of 1:1, the crosslinking agent used was di (4-methylbenzoyl) peroxide, the heat stabilizer used was zinc stearate, the antibacterial agent used was horseradish, and the foaming agent used was an AC foaming agent.
Example 4:
the mould-proof wear-resistant environment-friendly PVC artificial leather comprises a base cloth layer and a PVC surface layer attached to the base cloth layer, wherein the PVC surface layer is prepared from the following components in parts by weight: 100 parts of PVC resin, 30 parts of functional elastomer, 70 parts of plasticizer, 20 parts of coconut shell powder modified vermiculite powder, 12 parts of cross-linking agent, 5 parts of heat stabilizer, 3 parts of antibacterial agent and 4 parts of foaming agent.
The functional elastomer used in this embodiment is a graphene oxide-modified thermoplastic polyurethane elastomer, and the amount of the added graphene oxide is 15wt% based on the mass of the thermoplastic polyurethane elastomer, and the specific preparation method is as follows: preparing 5wt% of graphene oxide aqueous suspension, adding an isocyanate modifier and thermoplastic polyurethane elastomer particles into the graphene oxide aqueous suspension, carrying out ultrasonic reaction for 4 hours at 72 ℃ under 100 KHz, carrying out centrifugal separation, keeping solids, washing, drying, grinding to 95%, and sieving with a 400-mesh sieve to obtain the functional elastomer.
In the process of preparing the functional elastomer, the preparation method of the graphene oxide water suspension comprises the following steps: fully grinding and dispersing graphene oxide and deionized water at the rotating speed of 30000 r/min for 30 min at the temperature of below 10 ℃, and then carrying out ultrasonic oscillation at the temperature of 50 ℃, wherein the frequency of the ultrasonic oscillation is controlled to be 75 kHz, and carrying out ultrasonic oscillation for 25 min to obtain the graphene oxide water suspension.
The adopted thermoplastic polyurethane elastomer is commercially available Hytrel 7246, the adopted isocyanate modifier is hexamethylene diisocyanate, and the using amount of the isocyanate modifier is 1.8 wt% of the mass of the thermoplastic polyurethane elastomer.
The coconut husk powder modified vermiculite powder used in the example is prepared by the following steps:
step i): centrifugally separating the vermiculite powder soaked in the hydrogen peroxide solution, keeping solids, washing the solids to be neutral by using deionized water, and drying to prepare pretreated vermiculite powder;
step ii): adding coconut shell powder and a silane coupling agent into a mixed solution of methyl isobutyl ketone, isopropanol and N, N-dimethylformamide, adding the dried pretreated vermiculite powder at 90 ℃ while stirring, continuing stirring at a constant temperature for reaction for 1.5 hours after the addition is finished, filtering, retaining solids, washing, drying, grinding to 90%, and sieving with a 2000-mesh sieve to obtain the coconut shell powder modified vermiculite powder.
In the process of preparing the coconut husk powder modified vermiculite powder, the addition amount of the coconut husk powder is 20 wt%, the addition amount of the silane coupling agent is 4 wt%, and the silane coupling agent is gamma-aminopropyltriethoxysilane; the hydrogen peroxide solution used in step i) was a 15wt% hydrogen peroxide solution, the mass ratio of methyl isobutyl ketone, isopropyl alcohol and N, N-dimethylformamide in the mixed solution used in step ii) was 1:2:1, and the mass concentration of the pretreated vermiculite powder in the mixed solution was 0.8 g/mL.
In this embodiment, the plasticizer used is decyl epoxy oleate, the crosslinking agent used is dibenzoyl peroxide, the heat stabilizer used is lanthanum stearate, the antibacterial agent used is mustard, and the foaming agent used is an AC foaming agent.
Comparative example 1:
the raw material components of the PVC artificial leather of the comparative example do not contain the functional elastomer and the coconut husk powder modified vermiculite powder, and the rest is the same as the example 3.
Comparative example 2:
in the raw material components of the PVC artificial leather for the comparative example, commercial Hytrel 6356 elastomer was used in place of the functional elastomer, and the rest is the same as example 3.
Comparative example 3:
in the raw material components of the PVC artificial leather of the comparative example, commercially available vermiculite powder is used to replace coconut husk powder modified vermiculite powder, and the rest is the same as in example 3.
The above examples 1 to 4 and comparative examples 1 to 3 prepared PVC artificial leather by the following method:
step 1): adding the preparation raw materials of the PVC surface layer into a high-speed stirrer according to parts by weight, and carrying out high-speed mixing and stirring to obtain a mixture;
step 2): transferring the mixture prepared in the step 1) into an internal mixer for mixing, transferring into an open mill for plasticating after mixing is finished, and then conveying to a calender for calendering into a sheet;
step 3): the sheet prepared in the step 2) is attached to the base cloth layer to prepare a semi-finished product, and the semi-finished product is transferred to a foaming embossing machine for foaming embossing treatment to prepare the PVC artificial leather.
The process conditions used in the above preparation methods in the respective examples and comparative examples are shown in table 1 below.
TABLE 1 Process conditions
Item High speed stirring temperature High speed stirring time Mixing temperature Plastication temperature Temperature of foaming embossing
Example 1 100℃ 5 min 120℃ 130℃ 180℃
Example 2 106℃ 4 min 128℃ 138℃ 185℃
Example 3 108℃ 4 min 136℃ 145℃ 192℃
Example 4 110℃ 2 min 140℃ 150℃ 200℃
Comparative example 1 108℃ 4 min 136℃ 145℃ 192℃
Comparative example 2 108℃ 4 min 136℃ 145℃ 192℃
Comparative example 3 108℃ 4 min 136℃ 145℃ 192℃
And (3) performance testing:
the artificial leathers obtained in the above examples and comparative examples were subjected to abrasion resistance and dry-wet rub resistance tests in the following specific methods.
And (3) testing the abrasion resistance: cutting the prepared artificial leather into a circle with the diameter of 12cm as a sample; and (3) placing the sample on a Martindale wear-resistant tester to test the wear resistance. The conditions of the test were: load 1kg, rotate 50 turns. The samples were observed for fuzzing, flaking, slushing and cracking of the coating.
Dry and wet rub resistance test: placing the prepared artificial leather as a sample in a constant temperature and humidity box with the temperature of 20 ℃ and the humidity of 65% for 48 hours; taking out the sample and placing the sample in a leather color fastness instrument; fixing the lining cloth on a leather color fastness instrument, and wiping the sample by the lining cloth; after wiping, the wiped samples were compared using a standard gray sample card to determine the dry-wet rub rating.
Wherein, the experimental operation process of dry wiping and wet wiping is the same, and the conditions of the dry wiping test are as follows: the lining cloth is dry and white, and the wiping times are set to be 25 times; and wet wiping conditions: the lining cloth is wet and white, the water content is 70-75%, and the wiping times are set to be 20 times.
The results of the above abrasion resistance and dry and wet rub resistance tests are shown in table 2 below.
TABLE 2 test results
Item Phenomenon of wear Dry rub resistance rating Wet rub resistance rating
Example 1 No fluffing, shelling, pulp dropping and breaking through phenomena 5 5
Example 2 No fluffing, shelling, pulp dropping and breaking through phenomena 5 5
Example 3 No fluffing, shelling, pulp dropping and breaking through phenomena 5 5
Example 4 No fluffing, shelling, pulp dropping and breaking through phenomena 5 5
Comparative example 1 The fluffing phenomenon is serious, the shelling occurs at a plurality of positions, and the pulp falling is serious 3 3
Comparative example 2 Has slight fluffing phenomenon, and has no peeling, pulp falling and piercing 4 4-5
Comparative example 3 Has slight fluffing phenomenon, small point pulp falling in a scattered way, no peeling and no broken penetration 3-4 4
The artificial leathers prepared in the above examples and comparative examples were tested for odor grade with reference to VDA270, and the grade evaluation: 1, no odor; 2 smells but does not interfere; 3 has a clear odor, but still no interference; 4 has an interfering odor; 5 strong interfering odor; 6 has an intolerable odour. The test results are shown in Table 3 below.
TABLE 3 test results
Item Example 1 Example 2 Example 3 Example 4 Comparative example 1 Comparative example 2 Comparative example 3
Odor grade (40 ℃, 24 h) 1 1 1 1 3 1 2
Although the present invention has been described in detail, modifications within the spirit and scope of the invention will be apparent to those skilled in the art. Furthermore, it should be understood that the various aspects recited, portions of different embodiments, and various features recited may be combined or interchanged either in whole or in part. In the various embodiments described above, those embodiments that refer to another embodiment may be combined with other embodiments as appropriate, as will be appreciated by those skilled in the art. Furthermore, those skilled in the art will appreciate that the foregoing description is by way of example only, and is not intended to limit the invention.

Claims (10)

1. The utility model provides a mould proof wear-resisting environmental protection PVC synthetic leather, including the base cloth layer and with the PVC surface course that the base cloth layer was laminated mutually, its characterized in that, the PVC surface course is prepared by the raw materials that contain following component and part by weight content: 100 parts of PVC resin, 20-30 parts of functional elastomer, 50-70 parts of plasticizer, 12-20 parts of coconut shell powder modified vermiculite powder, 4-12 parts of cross-linking agent, 1-5 parts of heat stabilizer, 1-3 parts of antibacterial agent and 0.2-4 parts of foaming agent.
2. The mould-proof wear-resistant environment-friendly PVC artificial leather according to claim 1, wherein the functional elastomer is a graphene oxide modified thermoplastic polyurethane elastomer, and the addition amount of the graphene oxide is 5-15wt% based on the mass of the thermoplastic polyurethane elastomer.
3. The mould-proof wear-resistant environment-friendly PVC artificial leather according to claim 2, wherein the preparation method of the functional elastomer comprises the following steps: preparing 2-5 wt% of graphene oxide aqueous suspension, adding an isocyanate modifier and thermoplastic polyurethane elastomer particles into the graphene oxide aqueous suspension, carrying out ultrasonic reaction for 2-4 h at 65-80 ℃ under 100-120 KHz, carrying out centrifugal separation, retaining solids, washing, drying, grinding until 95% of the solid particles pass through a 400-mesh sieve, and thus obtaining the functional elastomer.
4. The mildewproof, wear-resistant and environment-friendly PVC artificial leather according to claim 3, wherein the isocyanate modifier is added in an amount of 0.4 to 1.8 wt% based on the mass of the thermoplastic polyurethane elastomer, and is selected from any one of hexamethylene diisocyanate, diphenylmethane diisocyanate or dicyclohexylmethane diisocyanate.
5. The mould-proof wear-resistant environment-friendly PVC artificial leather according to claim 1, wherein the preparation method of the coconut shell powder modified vermiculite powder is as follows:
step i): centrifugally separating the vermiculite powder soaked in the hydrogen peroxide solution, keeping solids, washing the solids to be neutral by using deionized water, and drying to prepare pretreated vermiculite powder;
step ii): adding coconut shell powder and a silane coupling agent into a mixed solution of methyl isobutyl ketone, isopropanol and N, N-dimethylformamide, adding the dried pretreated vermiculite powder at 80-95 ℃ while stirring, continuing to stir at a constant temperature for reaction for 1-2 hours after the addition is finished, filtering, retaining solids, washing, drying, grinding to 90%, and sieving with a 2000-mesh sieve to obtain the coconut shell powder modified vermiculite powder.
6. The mould-proof wear-resistant environment-friendly PVC artificial leather according to claim 5, wherein the addition amount of the coconut shell powder is 10-20% of the mass of the pretreated vermiculite powder, the addition amount of the silane coupling agent is 1-5% of the mass of the pretreated vermiculite powder, and the silane coupling agent is any one of gamma- (2, 3-epoxypropoxy) propyl trimethoxysilane or gamma-aminopropyltriethoxysilane.
7. The mould-proof wear-resistant environment-friendly PVC artificial leather according to claim 5, wherein the mass ratio of methyl isobutyl ketone, isopropanol and N, N-dimethylformamide in the mixed solution is 1:2-4:1, and the mass concentration of the pretreated vermiculite powder in the mixed solution is 0.4-0.8 g/mL.
8. The PVC artificial leather with characteristics of mold resistance, wear resistance and environmental protection as claimed in claim 1, wherein the plasticizer is at least one selected from aliphatic dibasic acid ester plasticizers or epoxy vegetable oil plasticizers, the cross-linking agent is at least one selected from 1, 1-di (t-butylperoxy) cyclohexane, di (4-methylbenzoyl) peroxide or dibenzoyl peroxide, the heat stabilizer is at least one selected from calcium stearate, calcium ricinoleate, zinc stearate, barium stearate or lanthanum stearate, the antibacterial agent is any one selected from chitin, mustard, castor oil or horseradish, and the foaming agent is an AC foaming agent.
9. The method for preparing mildewproof, wear-resistant and environment-friendly PVC artificial leather according to any one of claims 1 to 8, which comprises the following steps:
step 1): adding the preparation raw materials of the PVC surface layer into a high-speed stirrer according to parts by weight, and carrying out high-speed mixing and stirring to obtain a mixture;
step 2): transferring the mixture prepared in the step 1) into an internal mixer for mixing, transferring into an open mill for plasticating after mixing is finished, and then conveying to a calender for calendering into a sheet;
step 3): and (3) attaching the sheet prepared in the step 2) to a base fabric layer to prepare a semi-finished product, and transferring the semi-finished product to a foaming embossing machine for foaming embossing treatment to prepare the PVC artificial leather.
10. The method for preparing the mildewproof, wear-resistant and environment-friendly PVC artificial leather according to the claim 9, wherein in the step 1), the high-speed mixing and stirring are carried out at the stirring temperature of 100 ℃ and 110 ℃ for 2-5 min; the mixing temperature in the step 2) is 120-140 ℃, and the plastication is performed by sequentially passing through two open mills and performing plastication at the temperature of 130-150 ℃; the temperature of the foaming embossing treatment in the step 3) is 180-200 ℃.
CN202110076074.3A 2021-01-20 2021-01-20 Mildew-proof wear-resistant environment-friendly PVC artificial leather and preparation method thereof Pending CN112721364A (en)

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Application publication date: 20210430