CN110591249A - Processing technology of hollow building template - Google Patents
Processing technology of hollow building template Download PDFInfo
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- CN110591249A CN110591249A CN201910848420.8A CN201910848420A CN110591249A CN 110591249 A CN110591249 A CN 110591249A CN 201910848420 A CN201910848420 A CN 201910848420A CN 110591249 A CN110591249 A CN 110591249A
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/16—Straightening or flattening
- B29C53/18—Straightening or flattening of plates or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
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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
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G9/00—Forming or shuttering elements for general use
- E04G9/02—Forming boards or similar elements
- E04G9/05—Forming boards or similar elements the form surface being of plastics
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/017—Additives being an antistatic agent
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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
- C08L2201/00—Properties
- C08L2201/04—Antistatic
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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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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Abstract
The invention discloses a processing technology of a hollow building template, which comprises the working procedures of PVC co-extrusion layer raw material blending, core layer raw material blending, melting co-extrusion, cooling and shaping, stress relief treatment and traction cutting. Compared with the prior art, the PVC co-extrusion layer blend is applied to the hollow building template, and the antistatic property and the ultraviolet resistance are improved on the basis of ensuring the strength, the wear resistance and the heat resistance. The core layer raw material is prepared by taking polyvinyl chloride resin powder as a base material, uniformly stirring the polyvinyl chloride resin powder, a plasticizer of chlorinated palm oil methyl ester, an ACR processing aid acrylate copolymer, filler of light calcium carbonate, an anti-impact ACR special lubricant of monoglyceride and a calcium-zinc heat stabilizer to obtain a core layer mixed material, and the mixed material is used as a core layer material of the hollow building template, so that the wear resistance and the heat resistance are further improved on the basis of keeping light anti-impact.
Description
Technical Field
The invention relates to the field of building construction templates, in particular to a processing technology of a hollow building template.
Background
The building formwork is a temporary supporting structure, which is manufactured according to the design requirements, so that the concrete structure and the members are formed according to the specified positions and geometric dimensions, the correct positions of the concrete structure and the members are kept, and the self weight of the building formwork and the external load acting on the building formwork are born. The purpose of the template engineering is to ensure the quality and the construction safety of the concrete engineering, accelerate the construction progress and reduce the engineering cost.
The development of the building industry is promoted to a certain extent by the appearance of the hollow plastic building template, and compared with the steel templates, the wood templates, the solid plastic templates and various composite templates used in the past building industry, the hollow plastic template has the following advantages: good machinability, no moisture absorption, corrosion resistance, acid and alkali resistance; the strength is high, the impact resistance and the abrasion resistance are realized, the service life is long, and the turnover use frequency can reach more than 40 times; the surface is smooth and bright, a release agent is not required to be coated, the wood template can be sawed and nailed, and the wood template can be used together with the wood template; the used waste plates and leftover materials can be recycled, so that the cost is saved, and the pollution is reduced.
The prior art (CN103264506A) discloses a molding process of a hollow plastic building template, which comprises the steps of stirring, heating, extruding, sizing, stress-relief treatment, cutting and edge sealing treatment. The template after extrusion molding is subjected to rapid heating and quenching treatment, so that the internal residual stress is removed, the template shaping effect is improved, and the service life is prolonged; the edge banding machine is used for polishing the notch of the template, coating glue, finally pressing the notch, and bonding the edge banding strips at the edge cutting positions, so that cement mortar can be effectively prevented from being poured into the template through the hollow part in the using process of the template, and under the condition of the same workload, the service life of the edge-banded hollow plastic building template is three times and five times higher than that of the hollow plastic building template without edge banding. However, the following technical problems are found: 1) the PVC co-extrusion layer blend is applied to a hollow building template, and on the basis of ensuring the strength, the wear resistance and the heat resistance, the antistatic property and the ultraviolet resistance cannot be improved. The core layer is blended, so that the wear resistance and the heat resistance cannot be improved on the basis of keeping light weight and impact resistance; 2) the internal residual stress of the template semi-finished product cannot be eliminated, so that the pressure and the temperature of the PVC co-extrusion layer and the core layer are inconsistent, and the stability and the use times are reduced; 3) the long-acting antistatic and uvioresistant effects can not be achieved by adding functional fillers.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a processing technology of a hollow building template.
The purpose of the invention can be realized by the following technical scheme:
the invention provides a processing technology of a hollow building template, which comprises the following steps:
s1, blending PVC co-extrusion layer raw materials: weighing 60-90 parts of polyvinyl chloride resin powder, 20-30 parts of acrylonitrile-butadiene-styrene copolymer, 6-12 parts of aromatic polyamide fiber, 0.5-2 parts of antistatic filler, 5-10 parts of light calcium carbonate and 1-3 parts of titanium dioxide according to parts by weight, and uniformly mixing and stirring to obtain a PVC co-extrusion layer blend;
s2, blending raw materials of a core layer: weighing 80-120 parts of polyvinyl chloride resin powder, 1-4 parts of methyl chloro-palm oil, 2-5 parts of acrylate copolymer, 15-26 parts of light calcium carbonate, 0.6-2.2 parts of monoglyceride and 0.5-2 parts of calcium-zinc heat stabilizer according to parts by weight, and uniformly mixing and stirring to obtain a core layer mixed material;
s3, melt co-extrusion: feeding the PVC co-extrusion layer blend into a co-extruder, feeding the core layer blend into a main extruder, melting and plasticizing the PVC co-extrusion layer blend and the core layer blend at the temperature of 180 ℃ and 200 ℃, and then compositely extruding the PVC co-extrusion layer blend and the core layer blend into a forming die through a die head;
s4, cooling and shaping: carrying out water circulation cooling to obtain a template semi-finished product;
s5, stress relief treatment: removing residual stress in the template semi-finished product by adopting a repeated quenching and rapid heating treatment method;
and S6, traction cutting.
The PVC co-extrusion layer raw material provided by the invention considers the existing hollow building template, and although the mechanical strength and screw holding force of the template can be improved and the problem of deformation and brittleness can be improved by co-extruding a PVC layer on a core layer, the PVC co-extrusion layer raw material is poor in ultraviolet resistance and antistatic property, and particularly after being used for multiple times in a rotary mode, the PVC co-extrusion layer raw material can crack due to stress after long-term illumination, and the PVC co-extrusion layer raw material cannot release static electricity and also brings potential safety hazards to the construction process. The processing technology of the hollow building template of the invention takes polyvinyl chloride resin powder as a base material, acrylonitrile-butadiene-styrene copolymer as an auxiliary material, and aromatic polyamide fiber, antistatic filler, light calcium carbonate and titanium dioxide as functional additives, and the PVC co-extrusion layer blend is obtained by uniformly mixing and stirring the materials. Wherein the acrylonitrile-butadiene-styrene copolymerThe acrylonitrile copolymer, which endows the acrylonitrile copolymer with chemical stability, oil resistance, rigidity and hardness, the butadiene copolymer improves the toughness, impact resistance and cold resistance, and the styrene copolymer has good dielectric property, so that the acrylonitrile-butadiene-styrene copolymer can remarkably improve the strength, toughness and processability after being mixed with the polyvinyl chloride resin powder, and the apparent density of the polyvinyl chloride resin powder is 0.42-0.45g/cm3The low density and light weight make them more compatible with copolymers and functional additives. Aromatic polyamide fiber (aramid fiber for short) is synthetic fiber prepared by condensation spinning of aromatic as a raw material, has good heat resistance and insulating property and stable chemical property, has good resistance to weak acid, weak base and most organic solvents, and permeates into polyvinyl chloride resin powder to further improve the heat resistance, corrosion resistance and electrostatic discharge property of the material. The light calcium carbonate has the advantages of large specific surface area, low price, easy dispersion, good glossiness and excellent sedimentation volume, is settled in the polyvinyl chloride, reduces the raw material components, and increases the wear resistance, heat resistance and hardness of the molded template. Compared with the prior art, when the PVC co-extrusion layer blend is applied to the hollow building template, the antistatic property and the ultraviolet resistance are improved on the basis of ensuring the strength, the wear resistance and the heat resistance.
And a core layer raw material blending step, wherein polyvinyl chloride resin powder is used as a base material, and a plasticizer of methyl chloro-palm oil, an ACR processing aid acrylate copolymer, filler of light calcium carbonate, an anti-impact ACR special lubricant of monoglyceride and a calcium-zinc heat stabilizer are uniformly stirred to obtain a core layer blend material which is used as a core layer material of the hollow building template, so that the wear resistance and the heat resistance are further improved on the basis of keeping light anti-impact.
And (2) sending the PVC co-extrusion layer blend into a co-extruder, sending the core layer blend into a main extruder, carrying out melt plasticization on the PVC co-extrusion layer blend and the core layer blend at the temperature of 180 ℃ and 200 ℃, carrying out composite extrusion through a die head to a forming die, forming the core layer material inside, forming the PVC co-extrusion layer material outside, and carrying out water circulation cooling to obtain a template semi-finished product with fixed specification and size.
On the basis of the prior art, the repeated rapid cooling and rapid heating treatment method is added after the conventional cooling and shaping step to eliminate the internal residual stress of the template semi-finished product, and the residual stress is possibly caused by uneven plastic deformation or phase change of the plasticized and cooled semi-finished product and can cause the part to warp or distort and deform or even crack. According to the repeated rapid cooling and rapid heating treatment method, water at the temperature of 5-10 ℃ is soaked, and 40KHz ultrasonic cleaning is used for cleaning, so that the plastic deformation in the semi-finished product is weakened, the micro impurities and bubbles in the semi-finished product are removed, and the stability of substances in the semi-finished product is maintained; and the mirror roller at the temperature of 80-90 ℃ is used for rolling and leveling back and forth, so that the pressure and the temperature of the PVC co-extrusion layer and the core layer are consistent, the stress of the template is fully released, and the stability and the use times of the template are further improved.
As a further aspect of the present invention, the antistatic filler is prepared by the following method: according to the weight parts, 3-5 parts of ultraviolet absorbent are dissolved by 20-30 parts of ethanol to obtain an ultraviolet absorbent solution, 8-15 parts of mesoporous molecular sieve is added into the ultraviolet absorbent solution, 0.5-0.8 part of graphene powder is added, the mixture is stirred at the rotating speed of 40-60r/min, and when the absorbance of the mixture is constant through an ultraviolet spectrophotometer, the mixture is subjected to reduced pressure filtration and vacuum drying to obtain the antistatic filler.
The antistatic filler is prepared by adsorbing an ultraviolet absorbent solution and graphene powder by using mordenite as a mesoporous molecular sieve, and performing reduced pressure filtration and vacuum drying when stirring until the absorbance is constant, namely the system concentration is constant. Wherein the specific surface area of the mordenite is 850-900m2Per g, crystallinity not less than 85%, sodium content not more than 0.1%, Si/Al ratio of 4-6, developed pores, strong adsorption, and can be mixed with Ca2+、Mg2+、Cs+、K+、Na+The method comprises the following steps of (1) exchanging heavy metal cations to reduce the total hardness of the solution, adsorbing an ultraviolet adsorbent solution and graphene powder by using the heavy metal cations, dispersing the ultraviolet adsorbent and the graphene powder inside and outside pores of a mesoporous molecular sieve, and uniformly dispersing the ultraviolet adsorbent and the graphene powder inside and outside the pores of the mesoporous molecular sieve along with removal of an ethanol solvent in a filtering and drying process. When the PVC co-extrusion layer raw material is applied to a building mouldAfter the board is formed, in the using process of the hollow building template, the mesoporous molecular sieve slowly releases the ultraviolet absorbent and the graphene powder, so that the long-acting antistatic and uvioresistant effects are achieved.
In a further embodiment of the present invention, the uv absorber is one or more selected from 2-hydroxy-4-n-octoxybenzophenone, 2- (2' -hydroxy-3 ', 5' -di-tert-phenyl) -5-chlorobenzotriazole, 2-hydroxy-4-methoxybenzophenone, o-hydroxybenzophenone and 2- (2' -hydroxy-5 ' -methylphenyl) benzotriazole.
As a further proposal of the invention, the mesoporous molecular sieve is mordenite with the specific surface area of 850-900m2The crystallinity is more than or equal to 85 percent, the sodium content is less than or equal to 0.1 percent, and the silicon-aluminum ratio is 4-6; the density of the graphene powder is 0.07-0.08g/cm3The specific surface area is 40-50m2/g。
As a further aspect of the present invention, the polyvinyl chloride resin powder has an apparent density of 0.42 to 0.45g/cm3The content of residual chloroethylene is less than 10 ug/g; the acrylonitrile-butadiene-styrene copolymer has heat distortion temperature of 94-96 deg.c, tensile strength of 52-55MPa and bending strength of 85-88 MPa.
As a further embodiment of the present invention, the number average molecular weight of the acrylate copolymer is 100-110 ten thousand; the volatility of the calcium-zinc heat stabilizer is less than or equal to 3.5 percent, the content of the metal oxide is more than or equal to 10 percent, and the apparent density is 0.4-0.6g/cm3。
As a further aspect of the present invention, the repeated rapid cooling and rapid heating method specifically comprises: soaking in 5-10 deg.C water for 3-5min, and cleaning with 40KHz ultrasonic wave; standing, draining, and leveling at 80-90 deg.C under 3-5MPa for 3-4 times; repeating the above steps for 3-4 times.
The invention has the beneficial effects that:
1. the processing technology of the hollow building template comprises the working procedures of PVC co-extrusion layer raw material blending, core layer raw material blending, melting co-extrusion, cooling and shaping, stress relief treatment and traction cutting, wherein the stress relief treatment step is added on the basis of the prior art, and the PVC co-extrusion layer raw material and the core layer raw material are subjected to stress relief treatmentScreening and research are carried out. In the PVC co-extrusion layer raw material, after the acrylonitrile-butadiene-styrene copolymer and the polyvinyl chloride resin powder are mixed, the strength, toughness and processability of the PVC co-extrusion layer raw material can be obviously improved, the apparent density of the polyvinyl chloride resin powder is 0.42-0.45g/cm3, and the compatibility of the PVC co-extrusion layer raw material with the copolymer and the functional additive is better due to low density and light weight; the aromatic polyamide fiber permeates into the polyvinyl chloride resin powder, so that the heat resistance, the corrosion resistance and the static discharge performance of the material are further improved; the light calcium carbonate not only reduces the raw material components, but also increases the wear resistance, heat resistance and hardness of the molded template. Compared with the prior art, the PVC co-extrusion layer blend is applied to the hollow building template, and the antistatic property and the ultraviolet resistance are improved on the basis of ensuring the strength, the wear resistance and the heat resistance. And a core layer raw material blending step, wherein polyvinyl chloride resin powder is used as a base material, and a plasticizer of methyl chloro-palm oil, an ACR processing aid acrylate copolymer, filler of light calcium carbonate, an anti-impact ACR special lubricant of monoglyceride and a calcium-zinc heat stabilizer are uniformly stirred to obtain a core layer blend material which is used as a core layer material of the hollow building template, so that the wear resistance and the heat resistance are further improved on the basis of keeping light anti-impact. The surface hardness of the hollow building template reaches 64HDThe impact strength reaches 29kJ/m2The bending strength reaches 50MPa, the dimensional change rate after heating reaches 0.15 percent, and the resistivity reaches 4.6 multiplied by 104Omega.m, the illumination size change rate reaches 0.08%.
2. According to the invention, a repeated quenching and rapid heating treatment method is added after the conventional cooling and shaping step, so that the internal residual stress of the template semi-finished product is eliminated, the template semi-finished product is soaked in water at the temperature of 5-10 ℃, and the template semi-finished product is cleaned by ultrasonic waves of 40KHz, so that the internal plastic deformation of the semi-finished product is weakened, the internal micro impurities and bubbles are removed, and the stability of internal substances of the finished product is maintained; and the mirror roller at the temperature of 80-90 ℃ is used for rolling and leveling back and forth, so that the pressure and the temperature of the PVC co-extrusion layer and the core layer are consistent, the stress of the template is fully released, and the stability and the use times of the template are further improved.
3. The antistatic filler is prepared by using mordenite as a mesoporous molecular sieve to adsorb an ultraviolet absorbent solution and graphene powder, wherein the ultraviolet absorbent and the graphene powder can be dispersed inside and outside pores of the mesoporous molecular sieve, and the ultraviolet absorbent and the graphene powder can be uniformly dispersed inside and outside the pores of the mesoporous molecular sieve along with the removal of an ethanol solvent in the filtering and drying process. When the mesoporous molecular sieve is used as a PVC co-extrusion layer raw material applied to a building template, the mesoporous molecular sieve slowly releases an ultraviolet absorbent and graphene powder in the using process of the hollow building template, so that long-acting antistatic and uvioresistant effects are achieved.
Drawings
The invention will be further described with reference to the accompanying drawings.
Fig. 1 is a flow chart of a processing process of the hollow building template.
Fig. 2 is a schematic structural view of the hollow building template of the present invention.
In the figure: 1. a first panel; 2. a second panel; 3. reinforcing ribs; 4. side plates.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-2, the present embodiment provides a processing method of a hollow building template, including the following steps:
s1, blending PVC co-extrusion layer raw materials: weighing 75 parts of polyvinyl chloride resin powder, 25 parts of acrylonitrile-butadiene-styrene copolymer, 8 parts of aromatic polyamide fiber, 1.2 parts of antistatic filler, 7 parts of light calcium carbonate and 1.6 parts of titanium dioxide according to parts by weight, and uniformly mixing and stirring to obtain a PVC co-extrusion layer blend; wherein the apparent density of the polyvinyl chloride resin powder is 0.42-0.45g/cm3The content of residual chloroethylene is less than 10 ug/g; the acrylonitrile-butadiene-styrene copolymer has heat distortion temperature of 94-96 deg.c, tensile strength of 52-55MPa and bending strengthThe strength is 85-88 MPa.
The preparation method of the antistatic filler comprises the following steps: dissolving 4 parts by weight of ultraviolet absorbent 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole in 26 parts by weight of ethanol to obtain an ultraviolet absorbent solution, adding 13 parts by weight of mesoporous molecular sieve into the ultraviolet absorbent solution, adding 0.6 part by weight of graphene powder, stirring at a rotating speed of 50r/min, and when an ultraviolet spectrophotometer detects that the absorbance is constant, carrying out reduced pressure filtration and vacuum drying to obtain the antistatic filler. Wherein the mesoporous molecular sieve is mordenite with a specific surface area of 850-900m2The crystallinity is more than or equal to 85 percent, the sodium content is less than or equal to 0.1 percent, and the silicon-aluminum ratio is 4-6; the density of the graphene powder is 0.07-0.08g/cm3The specific surface area is 40-50m2/g。
S2, blending raw materials of a core layer: weighing 105 parts of polyvinyl chloride resin powder, 3 parts of methyl chloro-palm oil, 4 parts of acrylate copolymer, 23 parts of light calcium carbonate, 1.3 parts of monoglyceride and 1.2 parts of calcium-zinc heat stabilizer according to parts by weight, and uniformly mixing and stirring to obtain a core layer mixed material; the number average molecular weight of the acrylate copolymer is 100-110 ten thousand; the volatility of the calcium-zinc heat stabilizer is less than or equal to 3.5 percent, the content of the metal oxide is more than or equal to 10 percent, and the apparent density is 0.4-0.6g/cm3。
S3, melt co-extrusion: feeding the PVC co-extrusion layer blend into a co-extruder, feeding the core layer blend into a main extruder, melting and plasticizing the PVC co-extrusion layer blend and the core layer blend at 189 ℃, and then compositely extruding the PVC co-extrusion layer blend and the core layer blend into a forming die through a die head;
s4, cooling and shaping: carrying out water circulation cooling to obtain a template semi-finished product;
s5, stress relief treatment: removing residual stress in the template semi-finished product by adopting a repeated quenching and rapid heating treatment method; the repeated rapid cooling and rapid heating treatment method comprises the following steps: soaking in 8 deg.C water for 4min, and cleaning with 40KHz ultrasonic wave; standing, draining, and leveling at 88 deg.C with a mirror roller under 4.5MPa for 3 times; the above operations are repeated for 4 times.
S6, obtain this cavity building templates after drawing the cutting, including first panel 1, second panel 2, strengthening rib 3, curb plate 4, first panel 1 sets up with second panel 2 is relative, and curb plate 4 is located between the both ends of first panel 1 and second panel 2, and strengthening rib 3 is vertical form or cross setting and encloses the cavity that closes and form at first panel 1, second panel 2, curb plate 4.
Example 2
Referring to fig. 1-2, the present embodiment provides a processing method of a hollow building template, including the following steps:
s1, blending PVC co-extrusion layer raw materials: weighing 85 parts of polyvinyl chloride resin powder, 27 parts of acrylonitrile-butadiene-styrene copolymer, 10 parts of aromatic polyamide fiber, 1.5 parts of antistatic filler, 8 parts of light calcium carbonate and 2.5 parts of titanium dioxide according to parts by weight, and uniformly mixing and stirring to obtain a PVC co-extrusion layer blend; wherein the apparent density of the polyvinyl chloride resin powder is 0.42-0.45g/cm3The content of residual chloroethylene is less than 10 ug/g; the acrylonitrile-butadiene-styrene copolymer has heat distortion temperature of 94-96 deg.c, tensile strength of 52-55MPa and bending strength of 85-88 MPa.
The preparation method of the antistatic filler comprises the following steps: according to the weight parts, 5 parts of ultraviolet absorbent o-hydroxybenzophenone and 2- (2 '-hydroxy-5' -methylphenyl) benzotriazole are dissolved by 30 parts of ethanol to obtain an ultraviolet absorbent solution, 15 parts of mesoporous molecular sieve are added into the ultraviolet absorbent solution, 0.7 part of graphene powder is added, the mixture is stirred at the rotating speed of 60r/min, and when the absorbance is constant through an ultraviolet spectrophotometer, the antistatic filler is obtained through reduced pressure filtration and vacuum drying. The mesoporous molecular sieve is mordenite with a specific surface area of 850-900m2The crystallinity is more than or equal to 85 percent, the sodium content is less than or equal to 0.1 percent, and the silicon-aluminum ratio is 4-6; the density of the graphene powder is 0.07-0.08g/cm3The specific surface area is 40-50m2/g。
S2, blending raw materials of a core layer: weighing 116 parts of polyvinyl chloride resin powder, 4 parts of methyl chloro-palm oil, 3.5 parts of acrylate copolymer, 23 parts of light calcium carbonate, 1.8 parts of monoglyceride and 1.5 parts of calcium-zinc heat stabilizer according to the parts by weight, and uniformly mixing and stirring to obtain a core layer mixed material; the number average molecular weight of the acrylate copolymer is 100-110 ten thousand; the volatility of the calcium-zinc heat stabilizer is less than or equal to 3.5 percent, the content of the metal oxide is more than or equal to 10 percent, and the apparent density is 0.4-0.6g/cm3。
S3, melt co-extrusion: feeding the PVC co-extrusion layer blend into a co-extruder, feeding the core layer blend into a main extruder, melting and plasticizing the PVC co-extrusion layer blend and the core layer blend at 200 ℃, and then compositely extruding the PVC co-extrusion layer blend and the core layer blend into a forming die through a die head;
s4, cooling and shaping: carrying out water circulation cooling to obtain a template semi-finished product;
s5, stress relief treatment: removing residual stress in the template semi-finished product by adopting a repeated quenching and rapid heating treatment method; the repeated rapid cooling and rapid heating treatment method comprises the following steps: soaking in 10 deg.C water for 4.5min, and cleaning with 40KHz ultrasonic wave; standing, draining, and leveling back and forth for 4 times at 85 deg.C under 5MPa with a mirror roller; the above operations are repeated for 3 times.
S6, obtain this cavity building templates after drawing the cutting, including first panel 1, second panel 2, strengthening rib 3, curb plate 4, first panel 1 sets up with second panel 2 is relative, and curb plate 4 is located between the both ends of first panel 1 and second panel 2, and strengthening rib 3 is vertical form or cross setting and encloses the cavity that closes and form at first panel 1, second panel 2, curb plate 4.
Example 3
Referring to fig. 1-2, the present embodiment provides a processing method of a hollow building template, including the following steps:
s1, blending PVC co-extrusion layer raw materials: weighing 85 parts of polyvinyl chloride resin powder, 27 parts of acrylonitrile-butadiene-styrene copolymer, 11 parts of aromatic polyamide fiber, 1.8 parts of antistatic filler, 9 parts of light calcium carbonate and 3 parts of titanium dioxide according to parts by weight, and uniformly mixing and stirring to obtain a PVC co-extrusion layer blend; the apparent density of the polyvinyl chloride resin powder is 0.42-0.45g/cm3The content of residual chloroethylene is less than 10 ug/g; the acrylonitrile-butadiene-styrene copolymer has heat distortion temperature of 94-96 deg.c, tensile strength of 52-55MPa and bending strength of 85-88 MPa.
The preparation method of the antistatic filler comprises the following steps: dissolving 4.5 parts by weight of 2-hydroxy-4-n-octoxybenzophenone serving as an ultraviolet absorbent in 27 parts by weight of ethanol to obtain an ultraviolet absorbent solution, and adding 11 parts by weight of a medium to the ultraviolet absorbent solutionAnd (3) adding 0.52 part of graphene powder into the molecular sieve, stirring at the rotating speed of 55r/min, reducing pressure and filtering when an ultraviolet spectrophotometer detects that the absorbance is constant, and drying in vacuum to obtain the antistatic filler. The mesoporous molecular sieve is mordenite with a specific surface area of 850-900m2The crystallinity is more than or equal to 85 percent, the sodium content is less than or equal to 0.1 percent, and the silicon-aluminum ratio is 4-6; the density of the graphene powder is 0.07-0.08g/cm3The specific surface area is 40-50m2/g。
S2, blending raw materials of a core layer: weighing 115 parts of polyvinyl chloride resin powder, 3.6 parts of methyl chloro-palm oil, 5 parts of acrylate copolymer, 25 parts of light calcium carbonate, 1.8 parts of monoglyceride and 1.5 parts of calcium-zinc heat stabilizer according to the parts by weight, and uniformly mixing and stirring to obtain a core layer mixed material; the number average molecular weight of the acrylate copolymer is 100-110 ten thousand; the volatility of the calcium-zinc heat stabilizer is less than or equal to 3.5 percent, the content of the metal oxide is more than or equal to 10 percent, and the apparent density is 0.4-0.6g/cm3。
S3, melt co-extrusion: feeding the PVC co-extrusion layer blend into a co-extruder, feeding the core layer blend into a main extruder, melting and plasticizing the PVC co-extrusion layer blend and the core layer blend at 195 ℃, and then compositely extruding the PVC co-extrusion layer blend and the core layer blend into a forming die through a die head;
s4, cooling and shaping: carrying out water circulation cooling to obtain a template semi-finished product;
s5, stress relief treatment: removing residual stress in the template semi-finished product by adopting a repeated quenching and rapid heating treatment method; the repeated rapid cooling and rapid heating treatment method comprises the following steps: soaking in 8 deg.C water for 4.5min, and cleaning with 40KHz ultrasonic wave; standing, draining, and leveling back and forth for 4 times at 90 deg.C under 5MPa by using a mirror roller; the above operations are repeated for 4 times.
S6, obtain this cavity building templates after drawing the cutting, including first panel 1, second panel 2, strengthening rib 3, curb plate 4, first panel 1 sets up with second panel 2 is relative, and curb plate 4 is located between the both ends of first panel 1 and second panel 2, and strengthening rib 3 is vertical form or cross setting and encloses the cavity that closes and form at first panel 1, second panel 2, curb plate 4.
Example 4
Referring to fig. 1-2, the present embodiment provides a processing method of a hollow building template, including the following steps:
s1, blending PVC co-extrusion layer raw materials: weighing 86 parts of polyvinyl chloride resin powder, 25 parts of acrylonitrile-butadiene-styrene copolymer, 10 parts of aromatic polyamide fiber, 1.5 parts of antistatic filler, 8 parts of light calcium carbonate and 2.5 parts of titanium dioxide according to parts by weight, and uniformly mixing and stirring to obtain a PVC co-extrusion layer blend; the apparent density of the polyvinyl chloride resin powder is 0.42-0.45g/cm3The content of residual chloroethylene is less than 10 ug/g; the acrylonitrile-butadiene-styrene copolymer has heat distortion temperature of 94-96 deg.c, tensile strength of 52-55MPa and bending strength of 85-88 MPa.
The preparation method of the antistatic filler comprises the following steps: according to the weight parts, 5 parts of ultraviolet absorbent o-hydroxybenzophenone is dissolved by 30 parts of ethanol to obtain an ultraviolet absorbent solution, 15 parts of mesoporous molecular sieve is added into the ultraviolet absorbent solution, 0.7 part of graphene powder is added, stirring is carried out at the rotating speed of 60r/min, and when the absorbance of an ultraviolet spectrophotometer is constant, reduced pressure filtration and vacuum drying are carried out to obtain the antistatic filler. The mesoporous molecular sieve is mordenite with a specific surface area of 850-900m2The crystallinity is more than or equal to 85 percent, the sodium content is less than or equal to 0.1 percent, and the silicon-aluminum ratio is 4-6; the density of the graphene powder is 0.07-0.08g/cm3The specific surface area is 40-50m2/g。
S2, blending raw materials of a core layer: weighing 114 parts of polyvinyl chloride resin powder, 3 parts of methyl chloro-palm oil, 4 parts of acrylate copolymer, 24 parts of light calcium carbonate, 1.7 parts of monoglyceride and 1.5 parts of calcium-zinc heat stabilizer according to parts by weight, and uniformly mixing and stirring to obtain a core layer mixed material; the number average molecular weight of the acrylate copolymer is 100-110 ten thousand; the volatility of the calcium-zinc heat stabilizer is less than or equal to 3.5 percent, the content of the metal oxide is more than or equal to 10 percent, and the apparent density is 0.4-0.6g/cm3。
S3, melt co-extrusion: feeding the PVC co-extrusion layer blend into a co-extruder, feeding the core layer blend into a main extruder, melting and plasticizing the PVC co-extrusion layer blend and the core layer blend at 200 ℃, and then compositely extruding the PVC co-extrusion layer blend and the core layer blend into a forming die through a die head;
s4, cooling and shaping: carrying out water circulation cooling to obtain a template semi-finished product;
s5, stress relief treatment: removing residual stress in the template semi-finished product by adopting a repeated quenching and rapid heating treatment method; the repeated rapid cooling and rapid heating treatment method comprises the following steps: soaking in 10 deg.C water for 5min, and cleaning with 40KHz ultrasonic wave; standing, draining, and leveling at 90 deg.C with a mirror roller under 4.5MPa for 3 times; the above operations are repeated for 4 times.
S6, obtain this cavity building templates after drawing the cutting, including first panel 1, second panel 2, strengthening rib 3, curb plate 4, first panel 1 sets up with second panel 2 is relative, and curb plate 4 is located between the both ends of first panel 1 and second panel 2, and strengthening rib 3 is vertical form or cross setting and encloses the cavity that closes and form at first panel 1, second panel 2, curb plate 4.
Comparative example 1
In this comparative example, step S1 is compared to example 1 without the addition of an antistatic filler.
Comparative example 2
In this comparative example, step S1 compares with example 1 without the addition of acrylonitrile-butadiene-styrene copolymer.
Comparative example 3
In this comparative example, step S2 compares to example 1 without the addition of a calcium zinc heat stabilizer.
Comparative example 4
Compared with the example 1, the step S5 repeated rapid cooling and rapid heating method does not assist 40KHz ultrasonic wave to clean.
Performance testing
The hollow building templates prepared in examples 1-4 and comparative examples 1-4 were measured for surface hardness, impact strength, bending strength and dimensional change rate after heating with reference to building industry standard JG/T418-2013, resistivity with reference to standard GB/T15738-2008, and illumination dimensional change rate after xenon arc lamp irradiation for 24h with reference to standard GB/T16422.2-1999. Specific test results are shown in table 1:
TABLE 1 hollow building template Performance test
From the above table, it can be seen that the hollow building template prepared in the embodiment of the present invention meets the requirements of the standard JG/T418-2013 in terms of surface hardness, impact strength, bending strength, and dimensional change rate after heating, and the resistivity is higher than that of the comparative example, which indicates that the hollow building template has excellent antistatic performance, small illumination dimensional change rate, and good ultraviolet resistance. The surface hardness reaches 64HDThe impact strength reaches 29kJ/m2The bending strength reaches 50MPa, the dimensional change rate after heating reaches 0.15 percent, and the resistivity reaches 4.6 multiplied by 104Omega.m, the illumination size change rate reaches 0.08%. In comparative example 1, the effect of slowly releasing the ultraviolet absorbent and the graphene powder by the mesoporous molecular sieve cannot be achieved because the antistatic filler is not added, so that the antistatic property and the ultraviolet resistance are poor. Comparative example 2 no acrylonitrile-butadiene-styrene copolymer was added, the effect of remarkably improving strength, toughness and workability after mixing with polyvinyl chloride resin powder could not be achieved, and the impact strength and bending strength were remarkably reduced. Comparative example 4 is not washed with 40KHz ultrasonic wave, so that the residual adsorbed impurities on the building template are more, the stress is not completely eliminated, and the hardness, the impact strength and the bending strength are reduced to a certain extent.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is illustrative and explanatory only and is not intended to be exhaustive or to limit the invention to the precise embodiments described, and various modifications, additions, and substitutions may be made by those skilled in the art without departing from the scope of the invention or exceeding the scope of the claims.
Claims (7)
1. The processing technology of the hollow building template is characterized by comprising the following steps of:
s1, blending PVC co-extrusion layer raw materials: weighing 60-90 parts of polyvinyl chloride resin powder, 20-30 parts of acrylonitrile-butadiene-styrene copolymer, 6-12 parts of aromatic polyamide fiber, 0.5-2 parts of antistatic filler, 5-10 parts of light calcium carbonate and 1-3 parts of titanium dioxide according to parts by weight, and uniformly mixing and stirring to obtain a PVC co-extrusion layer blend;
s2, blending raw materials of a core layer: weighing 80-120 parts of polyvinyl chloride resin powder, 1-4 parts of methyl chloro-palm oil, 2-5 parts of acrylate copolymer, 15-26 parts of light calcium carbonate, 0.6-2.2 parts of monoglyceride and 0.5-2 parts of calcium-zinc heat stabilizer according to parts by weight, and uniformly mixing and stirring to obtain a core layer mixed material;
s3, melt co-extrusion: feeding the PVC co-extrusion layer blend into a co-extruder, feeding the core layer blend into a main extruder, melting and plasticizing the PVC co-extrusion layer blend and the core layer blend at the temperature of 180 ℃ and 200 ℃, and then compositely extruding the PVC co-extrusion layer blend and the core layer blend into a forming die through a die head;
s4, cooling and shaping: carrying out water circulation cooling to obtain a template semi-finished product;
s5, stress relief treatment: removing residual stress in the template semi-finished product by adopting a repeated quenching and rapid heating treatment method;
and S6, traction cutting.
2. The process for processing the hollow building template according to claim 1, wherein the antistatic filler is prepared by the following steps: according to the weight parts, 3-5 parts of ultraviolet absorbent are dissolved by 20-30 parts of ethanol to obtain an ultraviolet absorbent solution, 8-15 parts of mesoporous molecular sieve is added into the ultraviolet absorbent solution, 0.5-0.8 part of graphene powder is added, the mixture is stirred at the rotating speed of 40-60r/min, and when the absorbance of the mixture is constant through an ultraviolet spectrophotometer, the mixture is subjected to reduced pressure filtration and vacuum drying to obtain the antistatic filler.
3. The processing technology of the hollow building template according to claim 2, wherein the ultraviolet absorbent is one or more of 2-hydroxy-4-n-octoxy benzophenone, 2- (2' -hydroxy-3 ', 5' -di-tert-phenyl) -5-chlorinated benzotriazole, 2-hydroxy-4-methoxy benzophenone, o-hydroxy benzophenone and 2- (2' -hydroxy-5 ' -methylphenyl) benzotriazole.
4. The processing technology of the hollow building template as claimed in claim 2, wherein the mesoporous molecular sieve is mordenite with a specific surface area of 850-900m2The crystallinity is more than or equal to 85 percent, the sodium content is less than or equal to 0.1 percent, and the silicon-aluminum ratio is 4-6; the density of the graphene powder is 0.07-0.08g/cm3The specific surface area is 40-50m2/g。
5. The process for manufacturing a hollow building panel according to claim 1, wherein the polyvinyl chloride resin powder has an apparent density of 0.42 to 0.45g/cm3The content of residual chloroethylene is less than 10 ug/g; the acrylonitrile-butadiene-styrene copolymer has heat distortion temperature of 94-96 deg.c, tensile strength of 52-55MPa and bending strength of 85-88 MPa.
6. The processing technique of hollow building template as claimed in claim 1, wherein the number average molecular weight of the acrylate copolymer is 100-110 ten thousand; the volatility of the calcium-zinc heat stabilizer is less than or equal to 3.5 percent, the content of the metal oxide is more than or equal to 10 percent, and the apparent density is 0.4-0.6g/cm3。
7. The processing technology of the hollow building template according to claim 1, wherein the repeated rapid cooling and rapid heating treatment method is specifically as follows: soaking in 5-10 deg.C water for 3-5min, and cleaning with 40KHz ultrasonic wave; standing, draining, and leveling at 80-90 deg.C under 3-5MPa for 3-4 times; repeating the above steps for 3-4 times.
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