CN113931519A - Assembled fiber-plastic section bar enclosing wall and preparation method thereof - Google Patents
Assembled fiber-plastic section bar enclosing wall and preparation method thereof Download PDFInfo
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- CN113931519A CN113931519A CN202111015465.0A CN202111015465A CN113931519A CN 113931519 A CN113931519 A CN 113931519A CN 202111015465 A CN202111015465 A CN 202111015465A CN 113931519 A CN113931519 A CN 113931519A
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L101/00—Compositions of unspecified macromolecular compounds
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/1413—Post-and-rail fences, e.g. without vertical cross-members
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/1413—Post-and-rail fences, e.g. without vertical cross-members
- E04H17/1447—Details of connections between rails and posts
- E04H17/1486—Details of connections between rails and posts the rails being positioned between the uprights of double posts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
- E04H17/1602—Using wooden, plastic or composite-material panel-like elements
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H17/00—Fencing, e.g. fences, enclosures, corrals
- E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
- E04H17/20—Posts therefor
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Polymers & Plastics (AREA)
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- Wood Science & Technology (AREA)
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Abstract
The invention discloses an assembled fiber-plastic section enclosing wall and a preparation method thereof, and belongs to the technical field of composite materials. The upright post, the assembling plate and the transverse bar of the assembled fiber-plastic section fence all use fiber-plastic composite materials made of waste textiles and waste plastics as raw materials, the cost is low, the environment is protected, the waste textiles and the waste plastics are recycled, the fiber-plastic composite materials used by the assembled fiber-plastic section fence have better mechanical properties than single components, in addition, the assembled fiber-plastic section fence is of an assembled structure, and the upright post, the assembling plate and the transverse bar can be transported to a construction site for assembly after being prefabricated in a factory, so that the construction efficiency is high, the transportation is convenient, and the energy is saved and the environment is protected.
Description
Technical Field
The invention belongs to the technical field of composite materials, and particularly relates to an assembled fiber-plastic section fence and a preparation method thereof.
Background
The enclosure wall is mainly a wall enclosing a building body. Almost all important building materials can become the material for building walls, such as wood, stone, brick, concrete, metal materials, polymer materials and even glass. At present, the fence is mainly made of plastic. The plastic enclosing wall is light in weight, convenient to transport and install and very wide in application in the aspect of building site enclosing barriers. However, plastics are not easily degraded, and the environmental problem is aggravated by using the plastic enclosure wall for a long time, so that it is very important to find a material which is more environment-friendly and light in weight to replace plastics to manufacture the enclosure wall.
With the increasing living standard of people, the yield of waste textiles and waste plastics is greatly increased. The wastes pollute the environment, occupy land resources and cause great waste of resources, so that the comprehensive recycling of the wastes is urgently developed. Wherein the waste plastics are recycled industrially.
China is a large country for producing chemical fibers, textiles and textiles (clothing, etc.), and is also a large country for consuming and exporting textiles, and a large amount of waste textiles are generated from a production end and a consumption end every year. The utilization method of the waste textiles in China is mainly divided into 3 types, firstly, the waste textiles are physically recycled and are mechanically decomposed into fibers for recycling, but the waste textiles are difficult to classify, the utilization rate of the recycled fibers is low, a certain proportion of new materials are needed, the obtained regenerated textiles are low in quality, a large amount of non-spinnable fiber dust is generated in the regeneration process, and the environment is polluted; secondly, chemical recovery, namely treating the waste textiles by using a chemical method to obtain monomers to prepare new fibers, wherein a large amount of hazardous wastes are generated in the chemical recovery process, a large amount of carbon dioxide is discharged in the regeneration process, the equipment investment is large, the production cost is high, the conversion rate of the carbon dioxide used as a resource is low, so that the economic benefit is poor, the high-purity raw material source is limited, and the popularization is difficult in terms of resource utilization, environmental load and economy; and thirdly, energy recovery, namely directly burning the waste textiles to convert the waste textiles into heat energy, but the heat energy recovery rate is low, the waste of the textiles is serious, a large amount of carbon dioxide is discharged, and harmful gases such as dioxin and the like can be generated. The comprehensive utilization rate of domestic waste textiles is lower than 20 percent, so that the method for efficiently increasing the value and recycling the waste textiles is not slow.
Disclosure of Invention
The invention provides a plastic fence made of fiber-plastic composite materials and a preparation method thereof, aiming at overcoming the defects that the plastic fence material used in the prior art is not green enough and environment-friendly and has poor utilization rate of waste textiles.
The technical scheme adopted by the invention is as follows:
the invention provides an assembled fiber-plastic section fence which comprises upright posts, assembling plates and transverse bars, wherein the upright posts are arranged on the upright posts; the upright posts, the assembling plates and the transverse bars are all made of fiber-plastic composite materials A; the raw materials of the fiber-plastic composite material A comprise textile fibers and plastics; the textile fibers are derived from a textile.
In one embodiment of the invention, the columns are grouped in two; the assembling plate is inserted between the two upright posts in the same group; the crosspiece uses two to be a set of, and two crosspieces of the same group insert between two stands of the same group, and lie in the makeup board top for one of two crosspieces of the same group, another lies in the makeup board below for the makeup board must not take place the displacement.
In one embodiment of the invention, the assembled board comprises a core layer and a skin layer; the core layer is made of a fiber-plastic composite material A; the surface layer is made of a fiber-plastic composite material B; the raw materials of the fiber-plastic composite material B comprise textile fibers, plastics and an anti-wear agent; the textile fibers are derived from a textile.
In one embodiment of the present invention, the mass ratio of the core layer to the surface layer is 1:0.1 to 0.5.
In one embodiment of the present invention, the fiber-plastic composite material a is prepared by the following steps:
s1: crushing, opening, removing impurities and carding the textile fabric in the interweaving state to obtain treated textile fiber; the textile can be woven fabric, knitted fabric or non-woven fabric, and the treated textile fiber is uniform and completely separated single fiber or fiber in a yarn structure;
s2: reducing the volume of the treated textile fiber and plastic, and mixing to obtain a fiber-plastic mixture, wherein the fiber-plastic mixture is in a block shape;
s3: dispersing the fibers in the fiber-plastic mixture in the plastic and forming an interface to obtain a crude fiber-plastic compound;
s4: granulating and cooling the crude fiber-plastic composite to obtain the fiber-plastic composite material A.
In one embodiment of the invention, the opening is to break up the textile fabric into a fluffy state, so that the volume of the finally treated textile fiber is enlarged by 2-6 times compared with the textile fabric.
In one embodiment of the invention, the opening times are 2-5 times, and the carding times are 1-3 times.
In one embodiment of the invention, in the step S2, the mixing is performed by screw mixing and extruding the treated textile fiber and plastic at 150-200 ℃ and 30-150 r/min, and the density of the fiber-plastic mixture obtained after volume reduction is 1050-1300 kg/m3。
In one embodiment of the invention, in step S3, the dispersion is banburying under the conditions of no oxygen and 150-200 ℃, the rotor speed of the banburying is 30-60 r/min, the differential ratio is 0.8-1.2, and the time is 5-20 min.
In one embodiment of the present invention, in step S4, the granulating and cooling are cone double extrusion and water cooling or biaxial tearing and air cooling, and the obtained fiber-plastic composite material has a particle size of 2-6 mm and a surface temperature of 80 ℃ or lower.
In one embodiment of the present invention, in step S1, the removing is to remove metal fragments and particles from the textile fabric by using gravity, sieving, air flow sorting, and the like.
In one embodiment of the present invention, a cooling step of cooling the fiber-plastic mixture to 120 to 150 ℃ is further included between steps S2 and S3.
In one embodiment of the present invention, the textile fabric in step S1 is new material, recycled material or a composite, a blended material or a mixture of the new material and the recycled material, the new material includes one or more of chemical fiber, plant fiber and animal fiber, the blended material or the mixture, and the recycled material includes old clothes or leftover materials generated in the textile processing process.
In one embodiment of the present invention, in step S2, the plastic is at least one of PE, PP, PVC, PS and ABS.
In one embodiment of the invention, in step S2, the mass ratio of the treated textile fibers to the plastic is 1: 0.4-0.8.
In one embodiment of the invention, in step S2, when the processed fiber and plastic are mixed, the method further includes adding auxiliary materials in an amount of 10-20% of the total mass of the fiber and the plastic, where the auxiliary materials include fillers, wood materials, and compatible, lubricating and dispersing aids.
In one embodiment of the present invention, the wood-based material includes at least one of wood flour, rice hulls, and straw.
In one embodiment of the invention, the filler comprises at least one of limestone, talc powder, fly ash, construction waste crushing, slag, and electronic circuit board crushing.
In one embodiment of the present invention, the auxiliary agent comprises at least one of mineral oil, vegetable oil, stearic acid and its derivatives, degraded polyolefin wax, antioxidant and ultraviolet absorber.
In one embodiment of the present invention, the fiber-plastic composite material B is prepared by the following steps:
on the basis of the preparation method of the fiber-plastic composite material A, S2 is replaced by: and reducing the volume of the treated textile fibers, the treated plastic and the wear-resisting agent, and mixing to obtain a fiber-plastic mixture, wherein the fiber-plastic mixture is formed into blocks.
In one embodiment of the present invention, in step S2, the mass ratio of the treated textile fibers, the treated plastic and the treated anti-abrasion agent is 1: 0.4-0.8: 0.1-0.3.
In one embodiment of the present invention, in step S2, the plastic is at least one of HDPE, ASA and PMMA.
The invention also provides a method for preparing the assembled fiber-plastic section fence, which comprises the following steps:
s1: crushing, opening, removing impurities and carding the textile fabric in the interweaving state to obtain treated textile fiber;
s2: reducing the volume of the treated textile fiber and plastic, and mixing to obtain a fiber-plastic mixture A;
s3: dispersing the fibers in the fiber-plastic mixture A in the plastic and forming an interface to obtain a crude fiber-plastic composite A;
s4: granulating and cooling the crude fiber-plastic composite A to obtain a fiber-plastic composite material A;
s5: melting and extruding the fiber-plastic composite material A to obtain a stand column, a spliced plate and a cross bar;
s6: assembling the upright posts, the assembling plates and the cross bars to obtain an assembled fiber-plastic section enclosing wall;
alternatively, the method is as follows:
s1: crushing, opening, removing impurities and carding the textile fabric in the interweaving state to obtain treated textile fiber;
s2: reducing the volume of the treated textile fiber and plastic, and mixing to obtain a fiber-plastic mixture A; reducing the volume of the treated textile fibers, the treated plastic and the abrasion-resistant agent, and mixing to obtain a fiber-plastic mixture B;
s3: dispersing the fibers in the fiber-plastic mixture A and the fiber-plastic mixture B in the plastic and forming an interface to obtain a crude fiber-plastic compound A and a crude fiber-plastic compound B;
s4: granulating and cooling the crude fiber-plastic composite A and the crude fiber-plastic composite B to obtain a fiber-plastic composite material A and a fiber-plastic composite material B;
s5: melting and extruding the fiber-plastic composite material A to obtain a stand column and a cross bar; co-extruding the fiber-plastic composite material A and the fiber-plastic composite material B to obtain a spliced board;
s6: and assembling the upright posts, the assembling plates and the cross bars to obtain the assembled fiber-plastic section fence.
In one embodiment of the invention, the opening is specifically to break up the textile into a fluffy state, so that the volume of the finally treated textile fiber is enlarged by 2-6 times compared with the textile;
the opening times are 2-5 times, and the carding times are 1-3 times.
In one embodiment of the invention, in the step S2, the mixing is performed by screw mixing and extruding the treated textile fiber and plastic at 150-200 ℃ and 30-150 r/min, and the density of the fiber-plastic mixture obtained after volume reduction is 1050-1300 kg/m3。
In one embodiment of the invention, in step S3, the dispersion is banburying under the conditions of no oxygen and 150-200 ℃, the rotor speed of the banburying is 30-60 r/min, the differential ratio is 0.8-1.2, and the time is 5-20 min.
In one embodiment of the present invention, in step S4, the granulating and cooling are cone double extrusion and water cooling or biaxial tearing and air cooling, and the obtained fiber-plastic composite material has a particle size of 2-6 mm and a surface temperature of 80 ℃ or lower.
In one embodiment of the present invention, in step S1, the removing is to remove metal fragments and particles from the textile fabric by using gravity, sieving, air flow sorting, and the like.
In one embodiment of the present invention, a cooling step of cooling the fiber-plastic mixture to 120 to 150 ℃ is further included between steps S2 and S3.
In an embodiment of the invention, in step S5, the melt extrusion of the fiber-plastic composite material a is to screw extrude the fiber-plastic composite material a at 150-200 ℃ and 30-150 r/min; the co-extrusion of the fiber-plastic composite material A and the fiber-plastic composite material B is realized by co-extruding the fiber-plastic composite material A and the fiber-plastic composite material B at the temperature of 150-200 ℃ and at the speed of 30-150 r/min.
In one embodiment of the present invention, the textile fabric in step S1 is new material, recycled material or a composite, a blended material or a mixture of the new material and the recycled material, the new material includes one or more of chemical fiber, plant fiber and animal fiber, the blended material or the mixture, and the recycled material includes old clothes or leftover materials generated in the textile processing process.
In one embodiment of the present invention, in the fiber-plastic mixture a, the plastic is at least one of PE, PP, PVC, PS and ABS.
In one embodiment of the invention, in the fiber-plastic mixture A, the mass ratio of the treated textile fibers to the plastic is 1: 0.4-0.8.
In one embodiment of the present invention, in the fiber-plastic mixture B, the plastic is at least one of HDPE, ASA and PMMA.
In one embodiment of the invention, the mass ratio of the treated textile fibers, the treated plastic and the treated anti-wear agent in the fiber-plastic mixture B is 1: 0.4-0.8: 0.1-0.3.
In one embodiment of the invention, in step S2, when the processed fiber and plastic are mixed, the method further includes adding auxiliary materials in an amount of 10-20% of the total mass of the fiber and the plastic, where the auxiliary materials include fillers, wood materials, and compatible, lubricating and dispersing aids.
In one embodiment of the present invention, the wood-based material includes at least one of wood flour, rice hulls, and straw.
In one embodiment of the invention, the filler comprises at least one of limestone, talc powder, fly ash, construction waste crushing, slag, and electronic circuit board crushing.
In one embodiment of the present invention, the auxiliary agent comprises at least one of mineral oil, vegetable oil, stearic acid and its derivatives, degraded polyolefin wax, antioxidant and ultraviolet absorber.
The technical scheme of the invention has the following advantages:
(1) the upright post, the assembling plate and the cross bar of the assembled fiber-plastic section fence provided by the invention all use the fiber-plastic composite material made of waste textile fabrics and waste plastics as raw materials, and the fiber-plastic composite material has the advantages of low cost, environmental protection and realization of recycling of the waste textile fabrics and the waste plastics, so that the assembled fiber-plastic section fence provided by the invention has extremely high application prospect in the aspects of construction site fence and the like, and the fiber-plastic composite material used by the assembled fiber-plastic section fence provided by the invention has better mechanical property than a single component in the fiber-plastic composite material, so that the assembled fiber-plastic section fence provided by the invention can reduce casualties caused by collapse and cracking of the construction site fence to a certain extent.
In addition, the assembly type fiber-plastic section enclosing wall provided by the invention is of an assembly type structure, and the upright columns, the assembly plates and the transverse bars can be transported to a construction site for assembly after being prefabricated in a factory, so that the construction efficiency is high, the transportation is convenient, and the energy is saved and the environment is protected.
(2) The preparation method of the assembled fiber-plastic section fence provided by the invention adds the step of opening before the textile is subjected to impurity removal, avoids the problems of uneven feeding, incomplete crushing of fine-count high-density cloth and non-orientation of fibers caused by forced feeding in the prior art, and enables the fiber → yarn → textile interwoven structure to be dissociated and to return to the state of yarn or even single fiber after opening, so that the fiber length during feeding is improved and the fiber orientation is consistent.
(2) Because the herbaceous fibers such as textile fibers, straws and the like are thinner, softer and flexible, the volume reduction step of the preparation method of the assembled fiber-plastic section fence can prevent the problem that the volume reduction step is not uniformly dispersed in plastic and a fiber-plastic interface is not easily formed, so that the reinforcing effect of the fibers is not obvious, and meanwhile, the production efficiency is improved, so that the whole scheme is more suitable for industrial production; the subsequent banburying leads the fiber to be dispersed in the plastic in a yarn or fiber shape, has certain orientation and forms a fiber-plastic interface coated by the plastic.
(3) The preparation method of the assembled fiber-plastic section fence provided by the invention directly increases the cooling step, protects the fabric fibers such as cotton and hemp which are easy to carbonize, and prevents carbonization or spontaneous combustion; the cooling between the steps S2 and S3 ensures that sufficient banburying time exists in the step S3, so that the fibers are fully dispersed in the plastic matrix and a good fiber-plastic interface is formed; and meanwhile, the cooling step prevents the aggregation and adhesion of materials, so that the burden is caused on the subsequent steps and the performance of the prepared composite material is influenced.
(4) The preparation method of the assembled fiber-plastic section enclosing wall provided by the invention is simple and feasible, is convenient for large-scale industrial production, is environment-friendly and energy-saving in raw materials, and has excellent performance and wide application field of the prepared fiber-plastic composite material.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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 some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of the overall structure of an assembled fiber-plastic profile enclosing wall.
In fig. 1, a column 1, a splice plate 2 and a rail 3.
Detailed Description
The following examples are provided to further understand the present invention, not to limit the scope of the present invention, but to provide the best mode, not to limit the content and the protection scope of the present invention, and any product similar or similar to the present invention, which is obtained by combining the present invention with other prior art features, falls within the protection scope of the present invention.
The examples do not show the specific experimental steps or conditions, and can be performed according to the conventional experimental steps described in the literature in the field. The reagents or instruments used are not indicated by manufacturers, and are all conventional reagent products which can be obtained commercially.
The textiles used in examples 1-4 were clothing mill offcuts and recovered uniforms, and the source was "two-net fusion" waste sorting.
The plastic used in examples 1-4 was PE, and the source was "two-network-fused" garbage sorting.
In the auxiliary materials used in the embodiments 1-4, the wood material is waste wood chips of a wood processing factory, and the source is 'two-net fusion' garbage classification and sorting.
The filler used in examples 1 to 4 was conventional commercially available 100 mesh calcium carbonate.
The auxiliary agents used in the embodiments 1 to 4 include conventional commercially available rubber process oil, stearic acid and derivatives thereof, degraded polyolefin wax, antioxidant 1010, and ultraviolet absorbent UV-531, and the specific use auxiliary materials include waste wood chips in mass ratio: calcium carbonate: rubber process oil: stearic acid: degrading the polyolefin wax: antioxidant: the ultraviolet absorbent is 10:5:1:1:1:1: 1.
Example 1: fiber-plastic composite material and preparation method thereof
The embodiment provides a fiber-plastic composite material, and the preparation method comprises the following steps:
(1) crushing the woven fabric, scattering the woven fabric into a fluffy state, repeating the process for 3 times, removing metal fragments and particles in the woven fabric by using airflow separation, and finally carding for 2 times to obtain the treated textile fiber, wherein the volume of the treated textile fiber is 3 times of that of the woven fabric, and the treated textile fiber is uniform and completely separated single fiber or fiber with a yarn structure;
(2) mixing the treated textile fiber, plastic and auxiliary material at 200 deg.C and 100r/min by screw extrusion, and reducing volume to obtain block fiber-plastic mixture with density of 1200kg/m3Then cooling the fiber-plastic mixture to 140 ℃; wherein the weight ratio of the textile fiber, the plastic and the auxiliary material is 1:0.5: 0.2.
(3) Banburying the fiber-plastic mixture under the conditions of no oxygen and 200 ℃ to ensure that fibers are dispersed in plastic and form an interface to obtain a crude fiber-plastic compound, wherein the banburying has a rotor rotating speed of 30r/min, a differential speed ratio of 1.1 and a time of 12 min;
(4) and (3) carrying out cone double extrusion and water cooling on the rough fiber-plastic composite to obtain the fiber-plastic composite material, wherein the particle size is 2-6 mm, and the surface temperature is below 80 ℃.
Example 2: fiber-plastic composite material and preparation method thereof
The embodiment provides a fiber-plastic composite material, and the preparation method comprises the following steps:
(1) crushing the woven fabric, scattering the woven fabric into a fluffy state, repeating the process for 4 times, removing metal fragments and particles in the woven fabric by using airflow separation, and finally carding for 3 times to obtain the treated textile fiber, wherein the volume of the treated textile fiber is 4 times of that of the woven fabric, and the treated textile fiber is uniform and completely separated single fiber or fiber with a yarn structure;
(2) extruding the treated textile fiber, plastic and auxiliary materials by a screw at 180 ℃ and 110r/min, mixing and reducing the volume to obtain a blocky fiber-plastic mixture with the density of 1100kg/m3Then cooling the fiber-plastic mixture to 120 ℃; wherein the weight ratio of the textile fiber, the plastic and the auxiliary material is 1:0.4: 0.15.
(3) Banburying the fiber-plastic mixture at 280 ℃ in the absence of oxygen to enable fibers to be dispersed in plastic and form an interface to obtain a crude fiber-plastic compound, wherein the banburying has a rotor rotating speed of 50r/min, a differential speed ratio of 0.9 and a time of 10 min;
(4) and (3) carrying out cone double extrusion and water cooling on the rough fiber-plastic composite to obtain the fiber-plastic composite material, wherein the particle size is 2-6 mm, and the surface temperature is below 80 ℃.
Example 3: fiber-plastic composite material and preparation method thereof
The embodiment provides a fiber-plastic composite material, and the preparation method comprises the following steps:
(1) crushing the woven fabric, scattering the woven fabric into a fluffy state, repeating for 2 times, sorting and removing metal fragments and particles in the woven fabric by using airflow, and finally carding for 1 time to obtain the treated textile fiber, wherein the volume of the treated textile fiber is 2 times of that of the woven fabric, and the treated textile fiber is a uniform and completely separated fiber and yarn-forming structure;
(2) extruding the treated textile fiber, plastic and auxiliary materials by a screw at 170 ℃ under 100r/min, mixing and reducing the volume to obtain a blocky fiber-plastic mixture with the density of 1200kg/m3Then cooling the fiber-plastic mixture to 140 ℃; wherein the weight ratio of the textile fiber, the plastic and the auxiliary material is 1:0.5: 0.2.
(3) Banburying the fiber-plastic mixture under the conditions of no oxygen and 200 ℃ to ensure that fibers are dispersed in plastic and form an interface to obtain a crude fiber-plastic compound, wherein the banburying has a rotor rotating speed of 40r/min, a differential speed ratio of 1.0 and a time of 5 min;
(4) and (3) carrying out cone double extrusion and water cooling on the rough fiber-plastic composite to obtain the fiber-plastic composite material, wherein the particle size is 2-6 mm, and the surface temperature is below 80 ℃.
Example 4: fiber-plastic composite material and preparation method thereof
This example provides a fiber-plastic composite and a method for making the same, which differs from example 1 in that there is no cooling step for the fiber-plastic mixture.
Comparative example 1: fiber-plastic composite material and preparation method thereof
This comparative example provides a fiber-plastic composite and a method for preparing the same, differing from example 1 in that there is no opening of the textile fibers.
Test example 1: performance testing of fiber-plastic composites
The fiber-plastic composite materials prepared in the examples and comparative examples of the present invention, as well as the PE new material (for injection bottle caps) derived from the Yanshan petrochemical 1300J and the recycled PE of mineral water bottle caps were subjected to performance tests, and the test results are shown in the following table 1:
TABLE 1 Performance test results for examples 1-4 and comparative example materials
| Group of | Tensile Strength (MPa) | Flexural Strength (MPa) | Flexural modulus (MPa) |
| PE new material | 22 | 21 | 1100 |
| Recycled PE | 18 | 18 | 600 |
| Example 1 | 32 | 40 | 3100 |
| Example 2 | 28 | 35 | 2800 |
| Example 3 | 34 | 31 | 2500 |
| Example 4 | 33 | 36 | 2400 |
| Comparative example 1 | 25 | 28 | 2100 |
As can be seen from the above table, the performance effect of each example is obviously higher than that of PE new material and regenerated PE; example 4 lacks a cooling step, the performance of which has little influence, but which seriously affects the preparation efficiency of the material and simultaneously causes potential safety hazard to the whole process; comparative example 1 compared with example 1, the performance of PE virgin stock and PE reclaimed stock is much poorer than that of example 1, but still higher than that of the base body because of the non-opening, uneven feeding, incomplete cloth crushing and non-oriented fiber.
The textile used in example 5 was clothing mill offal and recycled uniform, the source being "two-net-merge" waste sorting.
The plastic a used in example 5 was PE, the plastic B was HDPE and the source was "two-net fusion" waste sorting.
The anti-wear agent used in example 5 was a conventional commercially available a-186 anti-wear agent.
In the auxiliary materials used in example 5, the wood material is waste wood chips of a wood processing factory, and the source is 'two-net fusion' garbage classification and sorting.
The filler used in example 5 was a conventional commercially available 100 mesh calcium carbonate.
The auxiliary agent used in the embodiment 5 comprises conventional commercially available rubber processing oil, stearic acid and derivatives thereof, degraded polyolefin wax, antioxidant 1010 and ultraviolet absorbent UV-531, and the mass ratio of each component in the auxiliary materials is waste wood chips: calcium carbonate: rubber process oil: stearic acid: degrading the polyolefin wax: antioxidant: the ultraviolet absorbent is 10:5:1:1:1:1: 1.
Example 5: assembled fiber-plastic section bar enclosing wall and preparation method thereof
As shown in fig. 1, the present embodiment provides an assembled fiber-plastic profile fence, which includes a vertical column 1, a splicing plate 2, and a cross-piece 3; the upright posts 1 are divided into two groups; the assembling plate 2 is inserted between the two upright posts 1 in the same group; the crosspiece 3 uses two to be a set of, and two crosspieces 3 of the same group insert between two stands 1 of the same group, and 3 one of two crosspieces of the same group lie in makeup board 2 top, and another lies in makeup board 2 below for makeup board 2 must not take place the displacement.
The preparation method of the assembled fiber-plastic section fence comprises the following steps:
(1) crushing the woven fabric, scattering the woven fabric into a fluffy state, repeating the process for 3 times, removing metal fragments and particles in the woven fabric by using airflow separation, and finally carding for 2 times to obtain the treated textile fiber, wherein the volume of the treated textile fiber is 3 times of that of the woven fabric, and the treated textile fiber is uniform and completely separated single fiber or fiber with a yarn structure;
(2) extruding the treated textile fiber, plastic A and auxiliary materials by a screw at 200 ℃ and 100r/min for mixing and volume reduction to obtain a blocky fiber-plastic mixture A with the density of 1200kg/m3Then cooling the fiber-plastic mixture A to 140 ℃; in the fiber-plastic mixture A, the weight ratio of the textile fiber to the plastic A to the auxiliary materials is 1:0.5:0.2, and the textile fiber and the plastic A are mottled;
extruding the treated textile fiber, plastic B, auxiliary materials and wear-resisting agent by a screw at 200 ℃ under the condition of 100r/min, mixing and reducing the volume to obtain a blocky fiber-plastic mixture B with the density of 1200kg/m3Then cooling the fiber-plastic mixture B to 140 ℃; in the fiber-plastic mixture B, the weight ratio of the textile fibers to the plastic B to the auxiliary materials to the wear-resisting agent is 1:0.5:0.2:0.2, and the textile fibers and the plastic B are pure.
(3) Banburying the fiber-plastic mixture A and the fiber-plastic mixture B under the conditions of no oxygen and 200 ℃ to enable fibers to be dispersed in plastics and form an interface to obtain a crude fiber-plastic compound A and a crude fiber-plastic compound B, wherein the banburying has a rotor rotating speed of 30r/min, a differential ratio of 1.1 and a time of 12 min;
(4) carrying out cone double extrusion and water cooling on the rough fiber-plastic composite A and the rough fiber-plastic composite B to obtain a fiber-plastic composite material A and a fiber-plastic composite material B, wherein the particle size is 2-6 mm, and the surface temperature is below 80 ℃;
(5) melting and extruding the fiber-plastic composite material A at 180 ℃ and 100r/min to obtain a stand column and a cross bar; extruding the fiber-plastic composite material A and the fiber-plastic composite material B by using a co-extruder under the conditions of 180 ℃ and 100r/min to obtain a spliced board; the mass ratio of the fiber-plastic composite material A to the fiber-plastic composite material B is 1: 0.3;
(6) and assembling the upright posts, the assembling plates and the cross bars to obtain the assembled fiber-plastic section fence.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. An assembled fiber-plastic section fence is characterized by comprising upright columns, assembling plates and transverse bars; the upright posts, the assembling plates and the transverse bars are all made of fiber-plastic composite materials A; the raw materials of the fiber-plastic composite material A comprise textile fibers and plastics; the textile fibers are derived from a textile.
2. The fabricated fiber-plastic profile fence of claim 1, wherein the columns are grouped into two; the assembling plate is inserted between the two upright posts in the same group; the crosspiece uses two to be a set of, and two crosspieces of the same group insert between two stands of the same group, and lie in the makeup board top for one of two crosspieces of the same group, another lies in the makeup board below for the makeup board must not take place the displacement.
3. The fabricated fiber-plastic profile fence of claim 1 or 2, wherein the assembled panels comprise a core layer and a skin layer; the core layer is made of a fiber-plastic composite material A; the surface layer is made of a fiber-plastic composite material B; the raw materials of the fiber-plastic composite material B comprise textile fibers, plastics and an anti-wear agent; the textile fibers are derived from a textile.
4. The assembled fiber-plastic section fence as claimed in claim 2 or 3, wherein the mass ratio of the core layer to the surface layer is 1: 0.1-0.5.
5. A method for preparing the fabricated fiber-plastic section fence of any one of claims 1 to 4, wherein the method comprises the following steps:
s1: crushing, opening, removing impurities and carding the textile fabric in the interweaving state to obtain treated textile fiber;
s2: reducing the volume of the treated textile fiber and plastic, and mixing to obtain a fiber-plastic mixture A;
s3: dispersing the fibers in the fiber-plastic mixture A in the plastic and forming an interface to obtain a crude fiber-plastic composite A;
s4: granulating and cooling the crude fiber-plastic composite A to obtain a fiber-plastic composite material A;
s5: melting and extruding the fiber-plastic composite material A to obtain a stand column, a spliced plate and a cross bar;
s6: assembling the upright posts, the assembling plates and the cross bars to obtain an assembled fiber-plastic section enclosing wall;
alternatively, the method is as follows:
s1: crushing, opening, removing impurities and carding the textile fabric in the interweaving state to obtain treated textile fiber;
s2: reducing the volume of the treated textile fiber and plastic, and mixing to obtain a fiber-plastic mixture A; reducing the volume of the treated textile fibers, the treated plastic and the abrasion-resistant agent, and mixing to obtain a fiber-plastic mixture B;
s3: dispersing the fibers in the fiber-plastic mixture A and the fiber-plastic mixture B in the plastic and forming an interface to obtain a crude fiber-plastic compound A and a crude fiber-plastic compound B;
s4: granulating and cooling the crude fiber-plastic composite A and the crude fiber-plastic composite B to obtain a fiber-plastic composite material A and a fiber-plastic composite material B;
s5: melting and extruding the fiber-plastic composite material A to obtain a stand column and a cross bar; co-extruding the fiber-plastic composite material A and the fiber-plastic composite material B to obtain a spliced board;
s6: and assembling the upright posts, the assembling plates and the cross bars to obtain the assembled fiber-plastic section fence.
6. The method according to claim 5, wherein the opening is carried out by scattering the textile fabric into a fluffy state, so that the volume of the finally treated textile fiber is enlarged by 2-6 times compared with the textile fabric;
the opening times are 2-5 times, and the carding times are 1-3 times.
7. The method according to claim 5 or 6, wherein in step S2, the mixing is performed by screw mixing and extruding the treated textile fiber and plastic at 150-200 ℃ and 30-150 r/min, and the density of the fiber-plastic mixture obtained after volume reduction is 1050-1300 kg/m3。
8. The preparation method according to any one of claims 5 to 7, wherein in the step S3, the dispersion is banburying in the absence of oxygen at 150 to 200 ℃, the rotor speed of the banburying is 30 to 60r/min, the differential ratio is 0.8 to 1.2, and the time is 5 to 20 min.
9. The method according to any one of claims 5 to 8, wherein in step S4, the granulation and cooling are cone double extrusion and water cooling or biaxial tear and air cooling, and the obtained fiber-plastic composite material has a particle size of 2 to 6mm and a surface temperature of 80 ℃ or lower.
10. The preparation method according to any one of claims 5 to 9, wherein in step S5, the melt extrusion of the fiber-plastic composite material a is screw extrusion of the fiber-plastic composite material a at a temperature of 150 to 200 ℃ and at a speed of 30 to 150 r/min; the co-extrusion of the fiber-plastic composite material A and the fiber-plastic composite material B is realized by co-extruding the fiber-plastic composite material A and the fiber-plastic composite material B at the temperature of 150-200 ℃ and at the speed of 30-150 r/min.
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