CN115891350B

CN115891350B - Inflatable PVC membrane exhaust duct

Info

Publication number: CN115891350B
Application number: CN202211528523.4A
Authority: CN
Inventors: 张怀东; 何斌
Original assignee: Hunan Huada Daina Intelligent Manufacturing Technology Co ltd
Current assignee: Hunan Huada Daina Intelligent Manufacturing Technology Co ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-06-20
Anticipated expiration: 2042-11-30
Also published as: CN115891350A

Abstract

The invention discloses an inflatable PVC (polyvinyl chloride) film exhaust pipeline, and relates to the technical field of ventilation pipelines. The invention discloses an inflatable PVC film exhaust pipeline which sequentially comprises a second layer of PVC inner film, a first layer of PVC inner film, an inner coating, inner base cloth, warp threads, outer base cloth, an outer coating, a first layer of PVC outer film and a second layer of PVC outer film, wherein the warp threads are formed by the steps of: 1:2, interweaving and winding the polyester yarns, the acrylic yarns and the glass fiber yarns; the inner coating and the outer coating are made of aerogel heat-insulating paint; the first layer of PVC inner and outer films are made of PVC/PBO composite materials; the second layer of PVC inner and outer films is made of PVC/PVDF composite material. The inflatable PVC film exhaust pipeline is convenient to process, can be quickly assembled and disassembled, and has compression resistance and heat preservation effects; the double-layer film body is adopted, warp threads are woven in the middle, so that the film body is inflated without any deformation, and the air exhaust pipeline has excellent mechanical strength, waterproof property, ageing resistance, wear resistance, flame retardance and heat preservation performance, and the service life of the air exhaust pipeline is prolonged.

Description

Inflatable PVC membrane exhaust duct

Technical Field

The invention belongs to the technical field of ventilation pipelines, and particularly relates to an inflatable PVC (polyvinyl chloride) film exhaust pipeline and a preparation process thereof.

Background

The exhaust pipeline is generally referred to as a ventilation pipeline and is used for conveying air in a long distance, so that other technical indexes such as relative humidity, temperature, cleanliness and the like of the air in the working environment are unchanged; the air in the air pipe can not leak outwards or the outside air can not dip inwards under the bearable pressure of the ventilating pipe; and the noise is not generated as much as possible in the process of conveying the air, or the noise is reduced.

The common ventilation pipes are mainly: a hard ventilation pipe, a spiral supporting framework soft air pipe and a fiber cloth soft air pipe. The hard ventilation pipe is mainly made of metal air pipes (such as steel plates, galvanized plates, stainless steel, glass fiber reinforced plastics and the like) and hard plastic air pipes (PVC, PE, PP-R and the like), and has the advantages of high strength, corrosion resistance, good air tightness and the like, but the hard ventilation pipe is heavy, difficult to bend, large in occupied space, high in transportation cost and high in erection difficulty, and especially has the defects of higher cost when large-pipe-diameter negative pressure ventilation is needed, air leakage, air escape and the like at the joint of the pipe joint; the spiral support skeleton soft air pipe is manufactured by taking a spiral spring metal wire as a support skeleton and covering on the skeleton, has no welding, no air leakage, no water leakage, strong tightness and low installation cost, is stretched outwards to form a cylinder when in operation, has poor stability and uneven expansion, is easy to have phenomena of dead turning, unsmooth ventilation, instability and the like, is in a loose state after being axially compressed, and is not favorable for large-scale transportation; the fiber cloth flexible air pipe can be curled flatly, has light weight, low transportation and erection cost and convenient cleaning, but has the defects of air leakage, no heat preservation and the like.

Most of the existing laboratory exhaust and ventilation pipelines are hard steel air pipes, and the air film laboratory is inconvenient to assemble, disassemble and store. The inflatable membrane structure is inflated to the inside of the membrane structure through the air supply system to form certain internal and external pressure difference, so that the membrane surface is subjected to upward buoyancy to generate certain pretension stress so as to ensure the rigidity of the system, thereby maintaining the form and bearing external load, and the inflatable membrane structure can be applied to an exhaust pipeline of a gas membrane laboratory. The common inflatable membrane material is formed by coating film-forming resin on polyester fiber base cloth and mainly comprises an inflatable PVC membrane material, an inflatable PTFE membrane material and an inflatable ETFE membrane material. The inflatable PVC film material is convenient to process and good in toughness, but has the advantages of low strength, small elastic rigidity, easy aging, large creep amount, poor self-cleaning property, poor water resistance, general heat insulation performance, short service life and the like. In order to optimize the performance of the inflatable PVC film, PVF, PVDF, PMMA and the like are used as additional layers to be coated on a PVC coating in the prior art, but a large amount of solvent is required for PVF film formation, so that the PVC film is not environment-friendly and is not suitable for brush coating; the PVDF coating film is easy to generate pinholes and shrink to generate bubbles, so that the coating film is separated; the PMMA film has low surface hardness and is easy to scratch. The PTFE membrane has the advantages of good light transmittance, strong ultraviolet resistance, strong weldability, strong self-cleaning performance and the like, but has larger rigidity, is easy to generate a rolling phenomenon so as to weaken the strength, is easy to generate deformation and generate cracks, and influences the service life; PTFE membrane material has no base cloth, has the specific properties of self-cleaning property, corrosion resistance, high light transmittance and the like, but is easily influenced by external factors to cause air leakage, and has the defects of higher cost and the like.

Chinese patent No. CN201010285310.4 discloses an inflatable wall material, which is provided with two metal layers, and two barrier layers made of airtight material and metal layers on two sides of the insulating layer form an inflatable airtight space, and the inflatable wall material has high physical strength and is inflatable and foldable. However, the wall material in the patent uses metal as a supporting structure and a protective layer, so that the quality and cost of the wall material are increased, the waterproof, acid and alkali resistant and ageing resistant performances are poor, the deformation is easy, and the service life of the wall material is influenced; the air tightness of the wall material influences the heat preservation effect; and the inflatable material is inconvenient to fold and store, and is inconvenient to install and maintain.

Disclosure of Invention

The invention aims to provide an inflatable PVC film exhaust pipeline which is convenient to process, can be quickly assembled and disassembled, and has compression-resistant and heat-insulating effects; the double-layer film body is adopted, warp threads are woven in the middle, so that the film body is inflated without any deformation, and the air exhaust pipeline has excellent mechanical strength, waterproof property, ageing resistance, wear resistance, flame retardance and heat preservation performance, and the service life of the air exhaust pipeline is prolonged.

In order to achieve the purpose of the invention, the invention provides an inflatable PVC film exhaust pipeline, which comprises an inner film, an outer film and warp threads, wherein the inner film comprises a second layer of PVC inner film, a first layer of PVC inner film and an inner coating, the outer film comprises a second layer of PVC outer film, a first layer of PVC outer film and an outer coating, one end of the warp threads is fixed on an inner base cloth and connected with the inner coating, and the other end of the warp threads is fixed on an outer base cloth and connected with the outer coating;

the inner base cloth and the outer base cloth adopt warp knitting cloth, and punctiform interweaving points are uniformly distributed on the cloth surfaces of the inner base cloth and the outer base cloth;

the warp consists of polyester yarns, acrylic yarns and glass fiber yarns, and the single-ply warp consists of silk yarns with the number ratio of 3:1:2, interweaving and winding the polyester yarns, the acrylic yarns and the glass fiber yarns;

the inner coating and the outer coating are both composed of aerogel heat-insulating paint;

the first layer of PVC inner film and the first layer of PVC outer film are both formed by coating PVC/PBO composite materials;

the second layer of PVC inner film and the second layer of PVC outer film are both made of PVC/PVDF composite materials.

Furthermore, the warp yarns, the inner base cloth and the outer base cloth are arranged at intervals in a penetrating manner, the warp yarns are arranged in parallel, and the specification of the warp yarns is 600D/96f.

Further, the aerogel thermal insulation coating is any one of AC101, AC301, AC302 or AC303 of Zhuo Na nm.

Further, the PVC/PBO composite material is composed of the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of modified PBO fiber, 70-80 parts of plasticizer, 1-3 parts of heat stabilizer, 8-12 parts of mica powder, 10-15 parts of wollastonite, 0.5-1 part of light stabilizer and 0.2-0.4 part of antioxidant.

Further, the preparation method of the modified PBO fiber specifically comprises the following steps:

adding PBO fiber into nano chitin suspension, mixing, stirring for 10-15 min, adding silane coupling agent, stirring for 20-30 min, and drying to obtain modified PBO fiber.

Further, the addition amount of the silane coupling agent is 0.5-0.8% of the PBO fiber, and the addition amount of the nano chitin suspension is 5-7 times of the mass of the PBO fiber.

Further, the PVC/PVDF composite material is composed of the following raw materials in parts by weight: 100 parts of PVC resin, 50-60 parts of PVDF resin, 10-20 parts of modified silane polyether resin, 100-120 parts of plasticizer, 3-5 parts of heat stabilizer, 20-30 parts of nano chitin, 15-20 parts of mica powder, 25-30 parts of wollastonite, 0.5-1.0 part of light stabilizer and 0.5-0.7 part of antioxidant.

Further, the plasticizer is one or a combination of two or more of DINP, DNP, DPOP, TCP, ESO or EBSt;

the heat stabilizer is a calcium-zinc stabilizer or an organotin stabilizer;

the light stabilizer is an ultraviolet light absorber;

the antioxidant is antioxidant 1010 or antioxidant 168.

The invention also provides a preparation process of the inflatable PVC film exhaust pipeline, which specifically comprises the following steps:

(1) The warp threads are fixedly connected into a whole through dot interweaving points of an inner base fabric and an outer base fabric which are arranged in a penetrating mode through single-strand warp thread drawing, and a framework inflation layer is manufactured, wherein the inner base fabric and the outer base fabric are respectively positioned on the inner surface and the outer surface of the framework inflation layer;

(2) Spraying aerogel-coated heat-insulating paint with the thickness of 1.5-2 mm on the inner surface and the outer surface of the framework inflatable layer respectively, naturally airing for 1.5h, then coating the aerogel-coated heat-insulating paint with a sizing roller, carrying out curing pre-shaping treatment after 3 times of roller coating, respectively carrying out hot melt coating on the inner surface and the outer surface of the framework inflatable layer to form a first layer of PVC inner film and a first layer of PVC outer film, and cooling and shaping;

(3) And (3) sizing the inner surface of the first layer of PVC inner film and the outer surface of the first layer of PVC outer film obtained in the step (2) with sizing roller rubber adhesive, curing and pre-shaping, respectively hot-melting and laminating PVC/PVDF composite materials on the inner surface of the first layer of PVC inner film and the outer surface of the first layer of PVC outer film to form a second layer of PVC inner film and a second layer of PVC outer film, embossing, cooling, shaping, and finally trimming the product.

Further, the adhesive is an epoxy resin adhesive.

The invention has the following beneficial effects:

1. the inflatable PVC film exhaust pipeline is of a wiredrawing film structure, adopts a double-layer film body, warp threads are connected with an inner film and an outer film through a coating, and can bear certain pressure without deformation at will when the exhaust pipeline works, and has compression resistance and heat preservation effects; when the inner membrane and the outer membrane are inflated, the inner membrane and the outer membrane are supported, and when the air is exhausted, the exhaust pipe body can be folded and stored, so that the transportation and the installation are facilitated, and the exhaust pipe is easy to open and close.

2. The inflatable PVC film exhaust pipeline is integrally formed in a factory, only inflation is needed to prop up the film body in a construction site, and the film body is connected with an exhaust outlet, so that the construction difficulty is greatly reduced, and the maintenance is convenient; when not in use, the utility model is folded for storage, saves space, is beneficial to transportation, and can be taken and used at any time.

3. Compared with the fiber yarn formed by adopting single fiber yarn, the warp yarn has smaller heat conductivity coefficient (0.0339W/(m.K)), better tensile strength, toughness and elasticity, is not easy to break, can bear certain pressure, supports an exhaust pipeline, ensures the shape of the exhaust pipeline, is not easy to deform and prolongs the service life of the exhaust pipeline; the addition of the acrylic fiber improves the toughness of the warp, and the addition of the glass fiber improves the strength and the compression resistance of the warp, but the use of the acrylic fiber and the glass fiber does not deteriorate the elasticity and the heat preservation of the warp, on the contrary, the heat conductivity coefficient is reduced to a certain extent, so that the warp has better heat preservation effect, and the bearing capacity of an exhaust pipeline is improved.

4. The inflatable PVC film fixedly connects the point-shaped interweaving points of the inner base cloth and the outer base cloth which are penetrated through the single-strand warp wire drawing into a whole, so that the strength and the compression resistance of the PVC film are further improved; the warp has a connecting effect, so that the stability of the structural shape of the PVC film can be well maintained; the surfaces of the inner base cloth and the outer base cloth are sprayed and wheel-coated with the aerogel heat-insulating coating, so that the aerogel heat-insulating coating can permeate the inner base cloth and the outer base cloth and form a whole through forming a film with double-layer PVC resin on the surfaces of the inner base cloth and the outer base cloth, and partial stress can be better transferred and borne in the stress process, thereby improving the mechanical property and the compression resistance of the pipeline; the use of the aerogel heat insulation coating improves the heat insulation performance and the water resistance of the inflatable PVC film.

5. The PVC/PBO composite material disclosed by the invention takes PVC resin and modified PBO fibers as a matrix, the modified PBO fibers adopt silane coupling agents and CNCs to carry out surface modification on the PBO fibers, namely hydroxyl groups hydrolyzed by the silane coupling agents can undergo a shrinkage reaction with carboxyl groups in PBO fiber molecules and interact with nano chitin through hydrogen bonds, and meanwhile, the nano chitin can be uniformly dispersed on the surfaces of the PBO fibers, so that the dispersion effect and compatibility of the modified PBO fibers in the composite material are improved; the addition of the nano chitin can lead the modified PBO fiber and other components in the composite material to generate physical crosslinking and/or reversible hydrogen bond crosslinking network, thereby improving the strength, toughness and elasticity of the PVC/PBO composite material, leading the film formed by the PVC/PBO composite material not to be easy to be brittle broken in the process of inflation and use, having better elasticity after repeated inflation and deflation, and improving the repeated use rate of the PVC/PBO composite material; the addition of the modified PBO fiber improves the surface energy, water resistance and thermal stability of the composite material, so that the composite material has better strength, toughness and air tightness; the combination of mica powder and wollastonite improves the air tightness and mechanical strength of the PVC/PBO composite film, and has better toughness and elasticity.

6. The PVC/PVDF composite material is prepared by taking PVC resin and PVDF resin as matrixes, and then adding components such as modified silane polyether resin, nano chitin, plasticizer, heat stabilizer, mica powder, wollastonite and the like for mixing. The PVDF is added, so that the thermal stability, strength, toughness, impact resistance and water resistance of the PVC/PVDF composite material are improved, and the PVC/PVDF composite material has better wear resistance and weather resistance, so that the service life and the use effect of the PVC/PVDF composite material are prolonged; the modified silane polyether resin is added, so that the air tightness, the water resistance and the weather resistance of the PVC/PVDF composite material are improved, and the PVC/PVDF composite material has the characteristics of better mechanical strength, toughness, difficult pollution and the like; the nano chitin is added, so that the nano chitin can interact with epoxy groups in the epoxy resin adhesive in the hot-melt flow process, the cohesiveness of the PVC/PVDF composite material is improved, the nano chitin is not easy to peel off, the nano chitin can also interact with components, the elasticity and mechanical strength of the PVC/PVDF composite material are improved, and the service life of the PVC/PVDF composite material is prolonged; the combination of mica powder and wollastonite improves the air tightness and mechanical strength of the PVC/PVDF composite film, and has better toughness and elasticity.

7. In the production process of the inflatable PVC film, the inner and outer surfaces of the framework inflatable layer are firstly sprayed with the thicker aerogel-coated heat-insulating coating, and in a natural air-drying state, the aerogel-coated heat-insulating coating can be fully immersed into the framework inflatable layer, and then the framework inflatable layer is further coated in a round manner, so that more aerogel heat-insulating materials are immersed in the framework inflatable layer, and the strength and the heat-insulating effect of the framework inflatable layer are improved.

8. The inflatable PVC film exhaust pipeline has lower cost, can be formed by only inflating the inflatable PVC film, can be inflated at any time without being used, is deflated and folded at any time without occupying space, does not need additional assembly, and can also replace the conventional exhaust pipeline (such as a steel plate air pipe, a plastic ventilating pipe, a rubberized fabric ventilating pipeline and the like); the inflatable PVC film exhaust pipeline adopts a specific layer structure and is matched with proper process and formula, so that the prepared inflatable PVC film exhaust pipeline has the characteristics of good mechanical strength, impact resistance, easy installation and storage function, excellent physical strength, toughness, elasticity, aging resistance, waterproofness, flame retardance, wear resistance, heat preservation, long service life and the like.

Drawings

Fig. 1 is a schematic structural view of an inflatable PVC film exhaust duct of the present invention.

The attached drawings are identified: 1. warp threads; 2. an outer base cloth; 3. an outer coating; 4. a first layer of PVC outer film; 5. a second layer of PVC outer film; 6. an inner base fabric; 7. an inner coating; 8. a first layer of PVC inner film; 9. a second layer of PVC inner film.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The modified silane polyether resin of the invention is selected from the Xudi EXCESTAR series, model ExceStar ^TM S5830E。

The inflatable PVC film exhaust duct of the present invention will be described with reference to the accompanying drawings.

As shown in fig. 1, the inflatable PVC film exhaust pipeline provided by the invention comprises an inner film, an outer film and warp threads 1, wherein the inner diameter of the outer film is larger than the outer diameter of the inner film, the outer film is sleeved on the inner film, a skeleton inflation cavity is formed between the inner film and the outer film, and the inflatable PVC film exhaust pipeline has a supporting function and can also insulate heat. The structure of the inner film sequentially comprises a second layer of PVC inner film 9, a first layer of PVC inner film 8 and an inner coating 7 from inside to outside, and the structure of the outer film sequentially comprises a second layer of PVC outer film 5, a first layer of PVC inner film 8 and an outer coating 3 from outside to inside. One end of the warp 1 is fixed on the inner base cloth 6 and connected with the inner coating 7, and the other end of the warp 1 is fixed on the outer base cloth 2 and connected with the outer coating 3.

The inner base cloth 6 and the outer base cloth 2 are warp knitted cloth, and punctiform interweaving points are uniformly distributed on the cloth surfaces of the inner base cloth 6 and the outer base cloth 2. Preferably, the warp knitted fabric is made of polyester yarn with the specification of 300D-400D, and preferably 350D.

The warp 1 consists of polyester yarns, acrylic yarns and glass fiber yarns, and the single-strand warp 1 consists of silk yarns with the number ratio of 3:1:2, the polyester yarns, the acrylic yarns and the glass fiber yarns are mutually interweaved and wound to form the polyester yarn, the acrylic yarn and the glass fiber yarns. Preferably, the warp threads 1, the inner base cloth 6 and the outer base cloth 2 are arranged at intervals in a penetrating way, the warp threads 1 are arranged in parallel, and the specification of the warp threads 1 is 600D/96f. The thickness of the warp 1 (i.e. the distance between the inner base cloth 6 and the outer base cloth 2) is 10-70 mm, which can be set according to the purpose and use of the ventilation duct required, and can also be adjusted according to the main purpose, environment and cost of the ventilation duct. The warp yarn 1 preferably has a thickness of 20 to 50mm, more preferably 40mm.

The inner coating 7 and the outer coating 3 are both composed of aerogel insulation coating. The aerogel thermal insulation coating of the present invention is any one of AC101, AC301, AC302 or AC303 of Zhuo Na nanometers, preferably AC101. The thickness of the inner coating 7 and the outer coating 3 is preferably 1.5 to 2.5mm. The aerogel heat insulation coating is characterized in that a thicker coating is sprayed on the inner base cloth 2 and the outer base cloth 2 so as to be immersed in the inner base cloth 2 and the outer base cloth 1, so that the support strength and the heat insulation performance of the framework inflating cavity are improved, the waterproofness of the framework inflating layer can be improved, and the service life of the framework inflating layer is prolonged.

The first layer of PVC inner film 8 and the first layer of PVC outer film 4 are both coated by PVC/PBO composite materials.

The PVC/PBO composite material consists of the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of modified PBO fiber, 70-80 parts of plasticizer, 1-3 parts of heat stabilizer, 8-12 parts of mica powder, 10-15 parts of wollastonite, 0.5-1 part of light stabilizer and 0.2-0.4 part of antioxidant.

The preparation method of the modified PBO fiber comprises the following steps: 100 parts of PBO fiber is added into 500-700 parts of nano chitin suspension for mixing, stirring is carried out for 10-15 min, then 0.5-0.8 part of silane coupling agent is added, stirring is carried out for 20-30 min, and drying is carried out, thus obtaining the modified PBO fiber. The silane coupling agent used in the invention is silane coupling agent KH-560, and the nano chitin suspension is selected from nano chitin TC-UCN-003 of northern heaven.

The second PVC inner film 9 and the second PVC outer film 5 are both made of PVC/PVDF composite materials.

The PVC/PVDF composite material is composed of the following raw materials in parts by weight: 100 parts of PVC resin, 50-60 parts of PVDF resin, 10-20 parts of modified silane polyether resin, 100-120 parts of plasticizer, 3-5 parts of heat stabilizer, 20-30 parts of nano chitin, 15-20 parts of mica powder, 25-30 parts of wollastonite, 0.5-1.0 part of light stabilizer and 0.5-0.7 part of antioxidant. The nano chitin in the PVC/PVDF composite material is provided by Hunan Chuan New Material Co.

Preferably, the plasticizer is one or a combination of two or more of DINP, DNP, DPOP, TCP, ESO or EBSt; the heat stabilizer is a calcium-zinc stabilizer or an organotin stabilizer; the light stabilizer is an ultraviolet light absorber; the antioxidant is antioxidant 1010 or antioxidant 168.

(1) The warp 1 is fixedly connected into a whole through the punctiform interweaving points of the inner base cloth 6 and the outer base cloth 2 which are formed by the wire drawing of the single warp 1, so that the framework inflation layer is manufactured, and the inner base cloth 6 and the outer base cloth 2 are respectively positioned on the inner surface and the outer surface of the framework inflation layer.

(2) Spraying aerogel-coated heat-insulating paint with the thickness of 1.5-2 mm on the inner surface and the outer surface of the framework inflatable layer respectively, naturally airing for 1.5h, then coating the aerogel-coated heat-insulating paint by using a sizing roller, after 3 times of roller coating, curing and pre-shaping for 30min at 80 ℃, respectively hot-melting and coating PVC/PBO composite materials on the inner surface and the outer surface of the framework inflatable layer, wherein the hot-melting and laminating temperature is 160 ℃, the laminating pressure is 250N, the laminating speed is 5m/min, and cooling and shaping to form a first layer of PVC inner film 8 and a first layer of PVC outer film 4.

(3) And (3) coating epoxy resin adhesive on the inner surface of the first layer of PVC inner film 8 and the outer surface of the first layer of PVC outer film 4 obtained in the step (2) by using a sizing roller, coating for 3 times, curing and pre-shaping for 30min, wherein the pre-shaping temperature is 120 ℃, then respectively hot-melting and laminating PVC/PVDF composite materials on the inner surface of the first layer of PVC inner film 8 and the outer surface of the first layer of PVC outer film 4 to form a second layer of PVC inner film 9 and a second layer of PVC outer film 5, wherein the hot-melting and laminating temperature is 180 ℃, the laminating pressure is 420N, the laminating speed is 5m/min, embossing, cooling and shaping, and finally trimming the product. The epoxy resin adhesive is selected from German comet, and the model is FRS-CB.

The PVC/PBO composite and PVC/PVDF composite are described below in connection with specific examples.

Example 1PVC/PBO composite

The preparation method of the PVC/PBO composite material comprises the following steps:

weighing 100 parts of PVC resin, 60 parts of plasticizer DINP, 20 parts of ESO and 30 parts of modified PBO fiber in parts by weight, adding into a mixer, mixing uniformly, heating to 100 ℃, mixing for 10min, adding 3 parts of calcium-zinc stabilizer, 8 parts of mica powder and 15 parts of wollastonite, mixing for 15min, cooling to normal temperature, adding 1 part of ultraviolet light absorber UVP-327 and 0.4 part of antioxidant 1010, mixing for 30min, extruding by a double-screw extruder, and setting the temperature of the extruder to 160-190 ℃ to obtain the PVC/PBO composite material.

The preparation method of the modified PBO fiber comprises the following steps: 100 parts of PBO fiber is added into 500 parts of nano chitin suspension for mixing, stirring is carried out for 10min, then 0.5 part of silane coupling agent KH-560 is added, stirring is carried out for 30min, and drying is carried out, thus obtaining the modified PBO fiber.

The PVC resin in the embodiment of the invention is selected from PR-500 in the bench plastic industry; the plasticizer DINP is selected from the group consisting of Qilu petrochemical DINP; the ESO is selected from epoxy triglyceride ESO of Philippine chemical industry; the PBO fiber is selected from new materials in the new morning

PBO pulp; the calcium zinc stabilizer is selected from CT303TX of Kunrui chemical industry; the mica powder is 100 mesh mica powder; wollastonite is 1250 mesh wollastonite of Dexu.

Example 2PVC/PBO composite

weighing 100 parts of PVC resin, 50 parts of plasticizer DINP, 20 parts of ESO and 20 parts of modified PBO fiber in parts by weight, adding into a mixer, mixing uniformly, heating to 100 ℃, mixing for 10min, adding 1 part of calcium-zinc stabilizer, 12 parts of mica powder and 10 parts of wollastonite, mixing for 15min, cooling to normal temperature, adding 0.5 part of ultraviolet light absorber UVP-327 and 0.2 part of antioxidant 168, mixing for 30min, extruding by a double-screw extruder, and setting the temperature of the extruder to 160-190 ℃ to obtain the PVC/PBO composite material.

The preparation method of the modified PBO fiber comprises the following steps: 100 parts of PBO fiber is added into 700 parts of nano chitin suspension for mixing, stirring is carried out for 10min, then 0.8 part of silane coupling agent KH-560 is added, stirring is carried out for 30min, and drying is carried out, thus obtaining the modified PBO fiber.

Example 3

weighing 100 parts of PVC resin, 50 parts of plasticizer DINP, 30 parts of ESO and 25 parts of modified PBO fiber according to parts by weight, adding into a mixer, mixing uniformly, heating to 100 ℃, mixing for 10min, adding 2 parts of organic tin stabilizer, 12 parts of mica powder and 10 parts of wollastonite, mixing for 15min, cooling to normal temperature, adding 0.5 part of ultraviolet light absorber UVP-327 and 0.2 part of antioxidant 168, mixing for 30min, extruding by a double-screw extruder, and setting the temperature of the extruder to 160-190 ℃ to obtain the PVC/PBO composite material.

The organotin stabilizer in the embodiment of the invention is HERMOLITE C-101 of Acomax.

The preparation method of the modified PBO fiber comprises the following steps: 100 parts of PBO fiber is added into 600 parts of nano chitin suspension for mixing, stirring is carried out for 10min, then 0.7 part of silane coupling agent KH-560 is added, stirring is carried out for 30min, and drying is carried out, thus obtaining the modified PBO fiber.

Comparative example 1PVC composite

The raw materials and the preparation method of the PVC/PBO composite material of this comparative example were the same as in example 3, except that the modified PBO fiber was not added in this comparative example 1, and the addition amount of the PVC resin was 125 parts.

Comparative example 2PVC/PBO composite

The raw materials and preparation method of the PVC/PBO composite of this comparative example were the same as in example 3, except that the PBO fiber of this comparative example 1 was not modified, i.e., 25 parts of New materials were directly added

PBO pulp.

Example 4PVC/PVDF composite

The preparation method of the PVC/PVDF composite material comprises the following steps:

weighing 100 parts of PVC resin, 50 parts of PVDF resin, 20 parts of modified silane polyether resin, 100 parts of plasticizer and 30 parts of nano chitin according to parts by weight, adding into a mixing mill, uniformly mixing, heating to 100 ℃, mixing for 10min, adding 5 parts of organic tin stabilizer, 15 parts of mica powder and 30 parts of wollastonite, mixing for 20min, cooling to normal temperature, adding 1 part of ultraviolet light absorber UVP-327 and 0.5 part of antioxidant 1010, mixing for 30min, extruding by a double screw extruder, and setting the temperature of the extruder to 160-190 ℃ to obtain the PVC/PVDF composite material.

PVDF tree in the embodiment of the inventionThe lipid is selected from Acoma

720。

Example 5PVC/PVDF composite

100 parts of PVC resin, 60 parts of PVDF resin, 10 parts of modified silane polyether resin, 120 parts of plasticizer and 20 parts of nano chitin are weighed according to parts by weight, added into a mixing mill, uniformly mixed, heated to 100 ℃, mixed for 10 minutes, then added with 3 parts of organic tin stabilizer, 20 parts of mica powder and 25 parts of wollastonite, mixed for 20 minutes, cooled to normal temperature, added with 0.5 part of ultraviolet light absorber UVP-327 and 0.7 part of antioxidant 1010, mixed for 30 minutes, extruded by a double screw extruder, and the temperature of the extruder is set to 160-190 ℃ to obtain the PVC/PVDF composite material.

Example 6PVC/PVDF composite

100 parts of PVC resin, 55 parts of PVDF resin, 20 parts of modified silane polyether resin, 110 parts of plasticizer and 25 parts of nano chitin are weighed according to parts by weight, added into a mixing mill, uniformly mixed, heated to 100 ℃, mixed for 10 minutes, then added with 4 parts of organic tin stabilizer, 18 parts of mica powder and 22 parts of wollastonite, mixed for 20 minutes, cooled to normal temperature, added with 0.8 part of ultraviolet light absorber UVP-327 and 0.5 part of antioxidant 1010, mixed for 30 minutes, extruded by a double screw extruder, and the temperature of the extruder is set to 160-190 ℃ to obtain the PVC/PVDF composite material.

Comparative example 3PVC composite

The raw materials and the preparation method of the PVC composite of this comparative example were the same as in example 6, except that PVDF resin was not added in this comparative example 3, and the addition amount of the PVC resin was 155 parts.

Comparative example 4PVC/PVDF composite

The raw materials and preparation method of the PVC/PVDF composite of this comparative example were the same as in example 6, except that the modified silane polyether resin was not added in this comparative example 4.

Comparative example 5PVC/PVDF composite

The raw materials and preparation method of the PVC/PVDF composite material of this comparative example are the same as in example 6, except that nano chitin is not added in this comparative example 5.

The composite materials provided in the examples 1-6 and the comparative examples 1-5 are extruded by a screw extruder and then are mixed in a rolling machine, the mixing temperature is 150 ℃, the mixing time is 10min, the mixed materials are conveyed into a calender to be rolled into a film after being mixed, and the film is cooled by a water tank and degreased to obtain the PVC film with the thickness of 0.5+/-0.1 mm. The PVC films prepared in examples 1-6 and comparative examples 1-5 were then tested and the test results are shown in Table 1 below.

Table 1PVC film performance test data sheet

Remarks: the measured data are longitudinal detection results

As can be seen from Table 1, the PVC composite materials provided in examples 1-3 and examples 4-6 have superior mechanical strength, abrasion resistance, water resistance, thermal stability, etc. By modifying the PBO fiber, the invention obviously improves the interaction between the PBO fiber and each component and improves the comprehensive performance of the PVC/PBO composite material.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention.

Claims

1. The inflatable PVC film exhaust pipeline comprises an inner film, an outer film and warp threads (1), and is characterized in that the inner film comprises a second layer of PVC inner film (9), a first layer of PVC inner film (8) and an inner coating (7), the outer film comprises a second layer of PVC outer film (5), a first layer of PVC outer film (4) and an outer coating (3), one end of the warp threads (1) is fixed on an inner base cloth (6) and connected with the inner coating (7), and the other end of the warp threads (1) is connected with the outer coating (3) in a manner of fixing an outer base cloth (2);

the inner base cloth (6) and the outer base cloth (2) are warp knitted cloth, and punctiform interweaving points are uniformly distributed on the cloth surfaces of the inner base cloth (6) and the outer base cloth (2);

the warp (1) consists of polyester yarns, acrylic fibers and glass fiber yarns, and the single-strand warp (1) consists of silk yarns with the number ratio of 3:1:2, interweaving and winding the polyester yarns, the acrylic yarns and the glass fiber yarns;

the inner coating (7) and the outer coating (3) are both composed of aerogel heat-insulating paint;

the first layer of PVC inner film (8) and the first layer of PVC outer film (4) are both coated by PVC/PBO composite materials;

the PVC/PBO composite material consists of the following raw materials in parts by weight: 100 parts of PVC resin, 20-30 parts of modified PBO fiber, 70-80 parts of plasticizer, 1-3 parts of heat stabilizer, 8-12 parts of mica powder, 10-15 parts of wollastonite, 0.5-1 part of light stabilizer and 0.2-0.4 part of antioxidant;

the preparation method of the modified PBO fiber specifically comprises the following steps:

adding PBO fiber into nano chitin suspension, mixing, stirring for 10-15 min, adding silane coupling agent, stirring for 20-30 min, and drying to obtain modified PBO fiber; the addition amount of the silane coupling agent is 0.5-0.8% of the PBO fiber, and the addition amount of the nano chitin suspension is 5-7 times of the mass of the PBO fiber;

the second layer of PVC inner film (9) and the second layer of PVC outer film (5) are both made of PVC/PVDF composite materials;

the PVC/PVDF composite material is prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 50-60 parts of PVDF resin, 10-20 parts of modified silane polyether resin, 100-120 parts of plasticizer, 3-5 parts of heat stabilizer, 20-30 parts of nano chitin, 15-20 parts of mica powder, 25-30 parts of wollastonite, 0.5-1.0 part of light stabilizer and 0.5-0.7 part of antioxidant.

2. The inflatable PVC film exhaust pipeline according to claim 1, wherein the warp threads (1) are arranged at intervals between the inner base cloth (6) and the outer base cloth (2), the warp threads (1) are arranged in parallel, and the specification of the warp threads (1) is 600D/96f.

3. The inflatable PVC film exhaust duct of claim 1, wherein the aerogel insulation coating is any one of AC101, AC301, AC302 or AC303 of Zhuo Na nanometers.

4. The inflatable PVC film exhaust duct of claim 1, wherein the plasticizer is one or a combination of two or more of DINP, DNP, DPOP, TCP, ESO or EBSt;

the heat stabilizer is a calcium-zinc stabilizer or an organotin stabilizer;

the light stabilizer is an ultraviolet light absorber;

the antioxidant is antioxidant 1010 or antioxidant 168.

5. The process for preparing an inflatable PVC film exhaust duct as recited in any one of claims 1 to 4, comprising the steps of:

(1) The warp (1) is fixedly connected into a whole through punctiform interweaving points of an inner base fabric (6) and an outer base fabric (2) which are formed by drawing single-strand warp (1), so that a framework inflation layer is manufactured, and the inner base fabric (6) and the outer base fabric (2) are respectively positioned on the inner surface and the outer surface of the framework inflation layer;

(2) Respectively spraying aerogel heat insulation coating with the thickness of 1.5-2 mm on the inner surface and the outer surface of the framework inflatable layer, naturally airing for 1.5h, then coating the aerogel heat insulation coating with a sizing roller, carrying out curing pre-shaping treatment after 3 times of roller coating, respectively carrying out hot melt coating on the inner surface and the outer surface of the framework inflatable layer to form a first layer of PVC inner film (8) and a first layer of PVC outer film (4), and cooling and shaping;

(3) And (3) sizing the inner surface of the first layer of PVC inner film (8) and the outer surface of the first layer of PVC outer film (4) obtained in the step (2) with sizing roller glue, curing and pre-shaping, respectively hot-melting and laminating PVC/PVDF composite materials on the inner surface of the first layer of PVC inner film (8) and the outer surface of the first layer of PVC outer film (4) to form a second layer of PVC inner film (9) and a second layer of PVC outer film (5), embossing, cooling and shaping, and finally trimming the product.

6. The process for preparing an inflatable PVC film exhaust duct according to claim 5, wherein the adhesive is an epoxy adhesive.