阅读说明：本技术 一种卫生帐篷pvc/pca复合涂层织物面料及其加工工艺 (PVC/PCA composite coating fabric for sanitary tent and processing technology thereof ) 是由 王兆平 陈连星 张�杰 郎张超 于 2020-05-26 设计创作，主要内容包括：本发明涉及一种帐篷面料,特别涉及一种卫生帐篷PVC/PCA复合涂层织物面料及其加工工艺。一种卫生帐篷PVC/PCA复合涂层组合物,该涂层组合物是由以下重量份的原料制得：PVC糊树脂50-100份,共聚树脂0-50份,环保增塑剂40-80份,耐寒增塑剂0-30份,环保复合稳定剂2-4份,阻燃剂10-30份,防霉剂0-4份,光稳定剂0-5份,填料0-40份,粘合剂0-8份；共聚树脂为氯乙烯/醋酸乙烯/丙烯酸酯三元共聚树脂(PCA)；其中,PVC糊树脂与共聚树脂两者重量之和为100份。该面料避免使用大量低分子量增塑剂,也不使用或降低耐寒增塑剂使用量的同时具有优异的耐磨、耐折、耐低温性能。(The invention relates to a tent fabric, in particular to a PVC/PCA composite coating fabric for a sanitary tent and a processing technology thereof. A PVC/PCA composite coating composition for a sanitary tent is prepared from the following raw materials in parts by weight: 50-100 parts of PVC paste resin, 0-50 parts of copolymer resin, 40-80 parts of environment-friendly plasticizer, 0-30 parts of cold-resistant plasticizer, 2-4 parts of environment-friendly composite stabilizer, 10-30 parts of flame retardant, 0-4 parts of mildew inhibitor, 0-5 parts of light stabilizer, 0-40 parts of filler and 0-8 parts of adhesive; the copolymer resin is chloroethylene/vinyl acetate/acrylate ternary copolymer resin (PCA); wherein the sum of the weight of the PVC paste resin and the weight of the copolymer resin is 100 parts. The fabric avoids using a large amount of low molecular weight plasticizer, does not use or reduce the using amount of cold-resistant plasticizer, and has excellent wear resistance, folding resistance and low temperature resistance.)

1. The PVC/PCA composite coating composition for the sanitary tent is characterized by being prepared from the following raw materials in parts by weight: 50-100 parts of PVC paste resin, 0-50 parts of copolymer resin, 40-80 parts of environment-friendly plasticizer, 0-30 parts of cold-resistant plasticizer, 2-4 parts of environment-friendly composite stabilizer, 10-30 parts of flame retardant, 0-4 parts of mildew inhibitor, 0-5 parts of light stabilizer, 0-40 parts of filler and 0-8 parts of adhesive;

the copolymer resin is chloroethylene/vinyl acetate/acrylate ternary copolymer resin (PCA);

wherein the sum of the weight of the PVC paste resin and the weight of the copolymer resin is 100 parts.

2. The sanitary tent PVC/PCA composite coating composition of claim 1 wherein: the environment-friendly plasticizer is one or more selected from acetyl tributyl citrate (environment-friendly plasticizer ATBC), 1, 2-cyclohexane-dicarboxylic acid diisononyl ester (environment-friendly plasticizer UN 899) or epoxy octyl stearate.

3. The sanitary tent PVC/PCA composite coating composition of claim 1 wherein: the cold-resistant plasticizer is one or more of dioctyl adipate (DOA), diisodecyl adipate (DIDA) or dioctyl azelate (DOZ).

4. The sanitary tent PVC/PCA composite coating composition of claim 1 wherein: the environment-friendly composite stabilizer is calcium/zinc stabilizer and stabilizer 5718T.

5. The sanitary tent PVC/PCA composite coating composition of claim 1 wherein: the flame retardant is one or more of antimony trioxide, magnesium hydroxide, aluminum hydroxide, zinc borate or diphenyl cresyl phosphate; the mildew inhibitor is one or more of JYKABF-248 and n-butyl-1, 2-benzisothiazolin-3-one (BBIT).

6. The sanitary tent PVC/PCA composite coating composition of claim 1 wherein: the light stabilizer is one or more of 2-hydroxy-4-n-octoxybenzophenone (UV 531), BHT and 2, 6-di-tert-butyl-p-cresol.

7. The PVC/PCA composite coating fabric for the sanitary tent is characterized in that: the fabric lining is made by coating the PVC/PCA composite coating composition of the sanitary tent of claim 1 on the surface of polyester fiber fabric.

8. A process for preparing a PVC/PCA composite coated fabric for a sanitary tent as claimed in claim 1, which comprises the steps of:

step one, preparing PVC/PCA slurry: adding the raw materials of the PVC/PCA composite coating composition of the sanitary tent into a stirring device according to the formula amount, controlling the stirring temperature at 10-40 ℃, controlling the stirring speed at 10-1500 rpm, uniformly stirring, standing and homogenizing for 12-24 hours for later use;

step two, coating a functional coating: uniformly coating the PVC/PCA slurry on a polyester fiber fabric by adopting a scraper, and drying, plasticizing, cooling and forming;

the drying and plasticizing temperature is 160-220 ℃, and the coating and scraping speed is 10-30 m/min;

step three, coating an anti-pollution layer: at least one anti-pollution layer is coated on the surface of the plasticized coating by a roll coating process, the temperature is 150-220 ℃, the roll coating speed is 10-30 m/min, and the thickness of the coating is 0.01-0.1 mm.

9. The process of claim 8, wherein: in the functional coating, PVC/PCA slurry is coated on the front surface and the back surface of the polyester fiber fabric respectively by two layers; in the anti-pollution layer coating process, the front side and the back side of the plasticized coating layer are respectively coated with an anti-pollution layer.

10. The process of claim 8, wherein: the anti-pollution layer is a PVDF/acrylic composite coating or a spray-paintable acrylic coating.

Technical Field

The invention relates to a tent fabric, in particular to a PVC/PCA composite coating fabric for a sanitary tent and a processing technology thereof, and belongs to the technical field of fabrics.

Background

The tent is widely applied to the fields of national defense, medical disaster relief, scientific research and the like. When an epidemic situation or a disaster occurs, the medical emergency tent is commonly used in a large-scale disaster relief shelter, a disaster relief personnel command center, an on-site emergency medical treatment center, a temporary barracks, a disaster relief material transfer station and the like, is divided into a metal framework supporting tent and a frameless inflatable tent, and has the characteristics of easy disassembly and assembly, easy folding, light weight and convenient carrying. However, medical emergency tent production enterprises adopt messy fabrics, such as common canvas, oxford, PE woven laminated cloth, polyester fiber fabric/PVC laminated cloth/coated cloth and the like, and have the defects of lack of unification of execution standards and uneven quality. At ordinary times, civil administration, red cross and health and disease control departments of all countries can reserve a certain amount of medical and emergency disaster relief tents, and the demand for the medical emergency tents is greatly increased when epidemic situations and large-scale disasters occur. Under the global background, the medical emergency tent environment-friendly fabric with high comprehensive performance meeting the requirements of different countries and environments cannot meet the requirements.

Tent fabric processing techniques generally include three types: bonding method, coating method, and coating method. The bonding method is a processing method of bonding an upper layer and a lower layer of formed PVC films with a middle base fabric layer under the pressure of a hot roller by heating; the coating method is a process method which comprises the steps of uniformly coating the liquid PVC slurry on the front surface and the back surface of the base cloth by using a roller or a scraper, and then drying, laminating and plasticizing again; the coating method is a technological method that liquid PVC slurry is evenly coated on the front surface and the back surface of base cloth by a scraper, the base cloth is completely combined into a whole by drying and plasticizing, and the base cloth is formed after cooling. The products processed by the three methods have similar appearances and are applied to tent production enterprises, but the bonding method and the coating method are weaker than the coating method in the aspects of physical and chemical properties and durability.

The existing coating method for producing the tent fabric has the defects of unreasonable formula structure and unscientific selection of functional materials. Leading to difficulty in meeting high tear, high peel strength; high comprehensive performance index requirements such as durability, low-temperature deflection resistance, light aging resistance, flame retardance, environmental protection, antibiosis, pollution resistance and the like. The coating has the defects of easy peeling, low-temperature embrittlement and cracking, difficult repeated use caused by poor ageing resistance, inflammability, selection of materials which do not meet the environmental protection requirement, no necessary antibacterial and anti-pollution functions and the like.

Disclosure of Invention

The invention aims to provide a PVC/PCA composite coating fabric for a sanitary tent, which avoids using a large amount of low-molecular-weight plasticizer, does not use or reduce the using amount of cold-resistant plasticizer, and has excellent wear resistance, folding resistance and low-temperature resistance.

The invention also provides a processing technology of the PVC/PCA composite coating fabric for the sanitary tent.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a PVC/PCA composite coating composition for a sanitary tent is prepared from the following raw materials in parts by weight: 50-100 parts of PVC paste resin, 0-50 parts of copolymer resin, 40-80 parts of environment-friendly plasticizer, 0-30 parts of cold-resistant plasticizer, 2-4 parts of environment-friendly composite stabilizer, 10-30 parts of flame retardant, 0-4 parts of mildew inhibitor, 0-5 parts of light stabilizer, 0-40 parts of filler and 0-8 parts of adhesive; the copolymer resin is chloroethylene/vinyl acetate/acrylate ternary copolymer resin (PCA); wherein the sum of the weight of the PVC paste resin and the weight of the copolymer resin is 100 parts.

The invention selects sanitary-grade environment-friendly organic high polymer materials and inorganic functional materials, takes high-strength polyester fiber fabric as base cloth, and provides a fabric which meets the requirements of high tearing and high peeling strength simultaneously through scientific formula design and six-layer coating processing; the processing technology of the medical emergency disaster relief tent fabric has the advantages of strong durability, low-temperature flex resistance, light aging resistance, flame retardance, environmental protection, antibiosis, pollution resistance and other high comprehensive performance index requirements.

The PVC coating tent fabric generally reduces the hardness of PVC because a large amount of low-molecular-weight plasticizer is needed to be used, so that the elasticity, the mechanical property loss and the durability of the material are poor, the hardness of the material is sensitive to temperature, the hardness is high in winter, the flexibility is poor, the folding and brittle fracture phenomena are more, and the low-molecular-weight plasticizer in the coating is more, so that the material is easy to migrate to the surface, the pollution resistance is poor, the mechanical property is reduced, and the use effect is influenced. By blending PVC and PCA, the PCA has wear resistance, chemical corrosion resistance, oil resistance and low temperature resistance, so that the elasticity, low-temperature flexibility, migration resistance of a plasticizer, tear strength and the like of the PVC tent fabric can be greatly improved, and the comprehensive performance is greatly improved.

Compared with the PVC paste resin which is used alone, the PVC paste resin weakens the polarity among vinyl chloride molecules due to the embedding of vinyl acetate and acrylic ester in the PVC molecules, and the added ester group improves the dissolving speed of the plasticizer for the resin, thereby reducing the processing temperature, improving the plasticizing speed, improving the production efficiency to a certain extent and improving the product performance.

The cold-resistant plasticizer is not very good in compatibility with PVC generally, is easy to separate out and migrate, can only be used as an auxiliary plasticizer for improving cold resistance actually, and a PVC/PCA blending system can not be used or the using amount of the cold-resistant plasticizer is reduced, so that the problems of easy separation and migration of the cold-resistant plasticizer are solved, and the durability of a product is improved. The PVC/PCA composite coating fabric for the sanitary tent can be folded at the low temperature of-20 ℃ to-40 ℃.

The tent fabric is preferably selected from an environment-friendly plasticizer, an environment-friendly composite stabilizer, a light stabilizer and a flame retardant, so that the environment-friendly level of the tent fabric reaches the 6P environment-friendly standard, is the same as the standard of the fabric of the inflatable toy for children, and can be in direct contact with a human body. The flame retardant property of the PVC/PCA composite coating fabric for the sanitary tent prepared by the invention meets the requirements of national standard GB/T5455(B1) standard, European Union BS5438 and American NFPA-701 standard; the mechanical properties of cloth bases with different densities are controllable: the tensile strength of 2500-.

The preferred anti-pollution layer has self-cleaning property, can generate lotus effect, can shield the precipitation of the plasticizer and make the adhesion of pollutants such as dust difficult, and the special ultraviolet shielding function of the coating further improves the anti-light aging performance of the fabric, thereby further improving the durability of the fabric and greatly prolonging the service life.

Preferably, the environment-friendly plasticizer is one or more selected from acetyl tributyl citrate (ATBC), 1, 2-cyclohexane-dicarboxylic acid diisononyl ester (UN 899) or epoxy octyl stearate.

Preferably, the cold-resistant plasticizer is one or more of dioctyl adipate (DOA), diisodecyl adipate (DIDA) or dioctyl azelate (DOZ).

Preferably, the environment-friendly composite stabilizer is a calcium/zinc stabilizer (calcium stearate/zinc stearate) or a stabilizer 5718T (barium stearate/zinc stearate/antioxidant 1010).

Preferably, the flame retardant is one or more of antimony trioxide, magnesium hydroxide, aluminum hydroxide, zinc borate or diphenyl cresyl phosphate (flame retardant DPK); the mildew inhibitor is one or more of JYK ABF-248 and n-butyl-1, 2-benzisothiazolin-3-one (BBIT).

Preferably, the light stabilizer is one or more of 2-hydroxy-4-n-octoxybenzophenone (UV 531), BHT and 2, 6-di-tert-butyl-p-cresol.

A sanitary tent PVC/PCA composite coating fabric, which is prepared by coating the sanitary tent PVC/PCA composite coating composition according to claim 1 on the surface of a polyester fiber fabric.

A processing technology of the PVC/PCA composite coating fabric for the sanitary tent comprises the following steps:

step one, preparing PVC/PCA slurry: adding the raw materials of the PVC/PCA composite coating composition of the sanitary tent into a stirring device according to the formula amount, controlling the stirring temperature at 10-40 ℃, controlling the stirring speed at 10-1500 rpm, uniformly stirring, standing and homogenizing for 12-24 hours for later use;

step two, coating a functional coating: uniformly coating the PVC/PCA slurry on a polyester fiber fabric by adopting a scraper, and drying, plasticizing, cooling and forming;

the drying and plasticizing temperature is 160-220 ℃, and the coating and scraping speed is 10-30 m/min;

step three, coating an anti-pollution layer: at least one anti-pollution layer is coated on the surface of the plasticized coating by a roll coating process, the temperature is 150-220 ℃, the roll coating speed is 10-30 m/min, and the thickness of the coating is 0.01-0.1 mm.

Preferably, in the functional coating, the PVC/PCA slurry is coated on the front surface and the back surface of the polyester fiber fabric by two layers respectively; in the anti-pollution layer coating process, the front side and the back side of the plasticized coating layer are respectively coated with an anti-pollution layer.

Preferably, the anti-pollution layer is a PVDF/acrylic composite coating or a spray-paintable acrylic coating. The anti-pollution layers on the front and back surfaces adopt high polymer material coatings with self-cleaning property and spraying painting.

The invention has the beneficial effects that: aiming at the performance condition of the existing like products and the existing technological equipment conditions, the invention preferably selects domestic and foreign functional raw materials, carries out innovative formula design, establishes a PVC/PCA resin blending system, adopts a six-layer coating process, effectively solves the problems of the existing like products, and meets the requirements of high tearing and high peeling strength of the medical emergency tent fabric; the high comprehensive performance index requirements of durability, low-temperature deflection resistance, wear resistance, corrosion resistance, light aging resistance, flame retardance, environmental protection, antibiosis, mildew resistance, pollution resistance and the like.

The invention has wide applicability, accords with relevant standards at home and abroad, is not only suitable for medical emergency disaster relief tents, medical mattresses, ground mats and sanitary soft curtain partitions of civil administration and health systems of various countries, but also suitable for fabrics of national defense, scientific and technological exploration tents, temporary shed tents in exhibitions, sanitary tarpaulins of food vehicles and boats, inflatable amusement facilities for children, inflatable swimming pools and the like, and has wide social value.

Drawings

In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

FIG. 1 is a schematic process flow diagram of one embodiment of the method for processing the PVC/PCA composite coating fabric for the sanitary tent provided by the invention;

FIG. 2 is a graph of the effect of PCA mass% on the tensile strength of a coating;

FIG. 3 is a graph of the effect of PCA mass% on elongation at break of the coating;

FIG. 4 is a graph of the effect of PCA mass% on the low temperature resistance of a coating;

FIG. 5 is a plot of the effect of PCA mass% on the plasticizing temperature.

Detailed Description

The technical solution of the present invention will be further specifically described below by way of specific examples. It is to be understood that the practice of the invention is not limited to the following examples, and that any variations and/or modifications may be made thereto without departing from the scope of the invention.

In the present invention, all parts and percentages are by weight, unless otherwise specified, and the equipment and materials used are commercially available or commonly used in the art. The methods in the following examples are conventional in the art unless otherwise specified.

The reagents used in the following examples, unless otherwise specified, were purchased from conventional biochemical reagent stores.

PCA copolymer resin, available from Anhui Sungchen chemical industry Co., Ltd, type: PCA, used to substitute vinyl chloride/vinyl acetate/acrylate terpolymer resins;

PVDF/acrylic resins are available from starred fine paint (suzhou) ltd, model 77203; nippon Karlehua coating science and technology Inc., model No. 3483, 7016, 93044.