CN109354708A - A kind of PVC co-extrusion building template and preparation method thereof - Google Patents
A kind of PVC co-extrusion building template and preparation method thereof Download PDFInfo
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/34—Chemical features in the manufacture of articles consisting of a foamed macromolecular core and a macromolecular surface layer having a higher density than the core
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
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- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/08—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing carbon dioxide
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/02—CO2-releasing, e.g. NaHCO3 and citric acid
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
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- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/18—Binary blends of expanding agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2327/06—Homopolymers or copolymers of vinyl chloride
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- C—CHEMISTRY; METALLURGY
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- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2427/06—Homopolymers or copolymers of vinyl chloride
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Abstract
The invention discloses a kind of PVC co-extrusion building templates and preparation method thereof, including sandwich layer and the PVC coextruded layer for being covered on core layer surface, the sandwich layer includes following raw material: plastic building template reclaimed materials, ACR processing aid, heat stabilizer, filler, in-lubricant, external lubricant, foaming control agent, white hair infusion, yellow foaming agent；The PVC coextruded layer includes following raw material: PVC, ACR processing aid, solid plasticizer, heat stabilizer, impact modifier, filler, in-lubricant, external lubricant.Compared with prior art, it is foamed material, the co-extrusion building template product that surface is hard PVC material that the present invention forms centre by way of coextrusion, the building template being prepared has high surface hardness, the advantages of high static bending strength, high bending elastic modulus, high supine human body, water-tolerant, acidproof, alkaline-resisting, anticorrosion is repeated and is recycled, and improves feed back utilization rate.
Description
Technical field
The invention belongs to building template fields, and in particular to a kind of PVC co-extrusion building template and preparation method thereof.
Background technique
Building template is to play supporting and shaping after concreting forming.Building template is general according to material properties
It is divided into plank sheathing, plastic formwork, steel form, bamboo slab rubber etc..
Plastic building template is the another generation new product after plank sheathing, steel form, bamboo slab rubber, be it is a kind of with mould Dai Mu,
To mould Dai Gang, energy saving novel environmental-friendly construction material, it is excellent to have that recyclable, corrosion resistance, release property are good, are used for multiple times etc.
Point, product use foam technique, and surface smoothness is high, can reach dry wall requirement after concrete casting, and metope is not necessarily to two
Secondary plastering processing.
In recent years, China carries out large-scale infrastructure construction every year, and template is the essential material of engineering.According to having
Pass data shows that the demand of the annual building template of the construction market in China reaches several hundred million square metres at present, in cast-in-place concrete knot
In structure engineering, form work engineering typically constitutes from the one third of entire project cost, mould plate technique directly affect engineering construction quality,
Cost and benefit.Building template mainly has three classes in the market, is wooden (bamboo) template, plastic formwork and steel form respectively, wherein wood
(bamboo) template usage amount is 92.1%, and steel form dosage is 5.8%, and plastic formwork dosage is 2.1%.
Wooden template: application earliest, due to consume a large amount of timber, and dismantles template and is easy splitting, and the proportion of goods damageds are higher, and one
As the number of turnover at 4-6 times, China not abundant for the forest reserves should more seek substitute products.It is united according to related data
Meter, by taking Guizhou Province as an example, the first half of the year in 2015 just consumes 1,030,000 cubes of timber, needs to cut down diameter 30cm, 4 meters high
Big 3,670,000, tree.
Steel template: the template is the substitute of wooden template, and product has standardized and formd series.Its advantages are
A large amount of timber can be saved, and can be repeatedly used, are used in turn rate up to 40 times, but it also has many be not so good as in place of people's will:
1. cost is high, average price is far higher by the price of 80 yuan/square metre of template in 280 yuan/square metre；2. it is heavy, it is lifted in construction
Inconvenience, disassembly are difficult；3. being limited by weight, single form area is little, and splicing block number is more in use, time-consuming, laborious；4. steel
Template and cement have certain affinity, dismantle the cement products surface such as easy column or crossbeam when template and generate butcher cuts, influence
Quality；5. steel form is easy corrosion.
Plastic formwork: it is fast that the template product in developed countries and regions such as the U.S., Germany, Japan obtains wideling popularize development
Suddenly, the house built with this building template is achieving environmental protection and energy saving.Its advantages are 1. to save a large amount of timber；2. the side to construct
Just quick and safety etc. has superiority；3. building template can be reduced significantly without maintenance and recoverable
Production cost can also solve many critical issues in engineering.As country is more and more tighter to environmental requirement, drug in some provinces is
Start the use of limitation low-quality plank sheathing and log template.
Currently, existing plastic building template is mainly PVC foam product, there are deformation of products warpage, screw is held
The problems such as power is small, embrittlement collapses angle；Moreover, production stability is poor, distribution of cells is uneven.
Summary of the invention
In order to solve the above technical problems, the present invention provides a kind of PVC co-extrusion building templates and preparation method thereof.Use co-extrusion
Technology, sandwich layer are, by one layer of PVC hard layer of co-extrusion on sandwich layer, to improve building template using PVC extrusion foaming technique
The problems such as intensity and supine human body, improvement deformation, embrittlement, to promote product comprehensive performance.
The technical scheme adopted by the invention is as follows:
A kind of PVC co-extrusion building template, including sandwich layer and the PVC coextruded layer for being covered on core layer surface, the sandwich layer includes
The raw material of following parts by weight:
The PVC coextruded layer includes the raw material of following parts by weight:
The S-700. that the trade mark of the PVC is the S-1000 that the degree of polymerization is 1000 or the degree of polymerization is 700
The ACR processing aid is acrylic acid esters co-polymer；The molecular weight of the acrylic acid esters co-polymer be 90~
1100000, appearance is white powder, and serve improves mixture mobility and processing performance in the present invention.Further, described
The model CPPA-02 or CPPA-01 of ACR processing aid.
The heat stabilizer complex lead salt stabilizer or Environment-friendlycalcium calcium zinc stabilizer, can be improved PVC decomposition temperature, extend by
Thermal decomposition time prevents PVC fast decoupled in thermal histories.
It is strong that product bending can be improved in the filler powdered whiting, light active calcium carbonate, talcum powder or wood powder
Degree reduces deflection.
The in-lubricant is aliphatic alcohol ester, monoglyceride, high-melting-point oxidized polyethylene wax one or more；Aliphatic alcohol ester
Appearance is white, and free from extraneous odour has good compatibility with various other lubrication prescription and melt can be promoted homogenous plasticized, and it is strong to improve impact
Degree and weld strength；Monoglyceride is a kind of low melting point lubricant, melt can be promoted homogenous plasticized in PVC product production process,
And one layer of lubricant layer is formed in process in PVC strand or between PVC and inorganic filler, reduce PVC and nothing in mixture
Shearing between machine filler reduces shear heat, reduces heat stabilizer consumption, effectively improves PVC stability；High-melting-point oxidic polyethylene
Wax can promote plasticizing effect, and plasticizing effect is the several times lubricated in other, the dosage of interior lubrication can suitably be reduced, to prevent
The precipitation phenomenon of lubricant.
The external lubricant is high melting point polyethylene wax, Fischer-Tropsch wax, calcium stearate, one in low melting point oxidized polyethylene wax
Kind is several；High melting point polyethylene wax is that appearance is white powder substance, is a kind of efficient external lubricant of PVC processing, improves
The lubricity of PVC melt and screw rod, barrel, mold improves the mobility and release property of mixture, promotes product surface gloss；
Low melting point oxidized polyethylene wax is that appearance is white or faint yellow solid powder, can effectively increase the mobile performance of PVC melt, is adjusted
High extrusion efficiency assigns the good glossiness of product, primarily serves outer lubricating action, and have certain compatibility with PVC, can subtract
The precipitation lubricated in few production process；Each outer lubrication fusing point is different, can take into account the preceding middle and later periods lubrication balance in production process,
Lower lubricant effect early period of fusing point is preferable, and the higher later period lubricant effect of fusing point is preferable.
The foaming control agent is the acrylic acid esters co-polymer of molecular weight 500-600 ten thousand；It primarily serves and improves PVC melt
Intensity adjusts the effect of cell size, to obtain the uniform product of abscess；In addition the work that a part promotes material plasticizing is also acted as
With.
The white hair infusion is sodium bicarbonate；Sodium bicarbonate is white crystal, belongs to endothermic blowing agent, decomposition temperature
Low, the gas flow of heat resolve release is less, and the lesser product of abscess can be obtained.The Huang foaming agent is azodicarbonamide,
Azodicarbonamide foaming agent (AC foaming agent) is orange crystals powder, belongs to heat release type foaming agent, heat resolve release
Gas flow is big, available uniform foam cell, fine and smooth product.Absorption is decomposed using AC foaming agent decomposition caused heat release and sodium bicarbonate
The two is used in compounding by characteristic, can balance the endogenous heat that material generates in process, it is ensured that the stability of production.
The solid plasticizer is the high-molecular-weight propylene acid esters analog copolymer of molecular weight 2,000,000；
The impact modifier is the mixture that haloflex and anti-impact ACR are formed according to weight ratio 1:1~1.5, is resisted
Impact modifier can promote plasticizing and improve the effect of product erosion-resisting characteristics, and haloflex impact modifing effects are preferable, but can drop
Low product vicat softening temperature, the impact modifing effects of anti-impact ACR are weaker, but have one to be set for product dimension card lubrication temperature is improved
With the mixture formed using the two according to weight ratio 1:1~1.5 is as impact modifier, using haloflex and anti-impact
Performance complement between ACR improves product comprehensive performance.
The present invention also provides the preparation methods of the PVC co-extrusion building template, comprising the following steps:
(1) sandwich layer mixing is putted the raw materials into Hot mixer and is mixed, after moisture removal is removed in humidity discharging, is discharged by formula
In cold mixing machine, after removing foreign matter, into holding vessel, and it is homogenized, obtains mixture；
(2) PVC coextruded layer mixing is putted the raw materials into Hot mixer and is mixed, moisture removal is removed in humidity discharging by formula
Afterwards, it is discharged into cold mixing machine, after removing foreign matter, into holding vessel, and is homogenized, obtains mixture；
(3) sandwich layer mixture enters main extruder, and PVC coextruded layer mixture enters coextruder, and coextruded layer and sandwich layer are molten
Body is respectively after the plasticizing of cylinder area, and the compound extruded at die head, packed products are put in storage after, traction cooling by water tank, cutting.
It in step (1) and step (2), is mixed in the Hot mixer specifically: heat is 400-500 seconds mixed, mixing temperature
Degree reaches 110-120 DEG C.
In step (1) and step (2), cold mixed 300-400 seconds to 40-45 DEG C.
In step (3), the extruder is using 90 parallel double-screw extruders, state modulator are as follows: extruder temperature
120-150℃；160-180 DEG C of 1 temperature of area of cylinder；160-180 DEG C of 2 temperature of area of cylinder；160-180 DEG C of 3 temperature of area of cylinder；4 temperature of cylinder area
160-180℃；160-180 DEG C of 5 temperature of area of cylinder；160-180 DEG C of 6 temperature of area of cylinder；160-180 DEG C of temperature of connection；Mould area temperature
160-180℃；Screw speed 16-20rpm；Charging rate 40-55rpm；Hauling speed 0.5-0.8m/min；Load 45-65%.
Compared with prior art, the present invention forms that centre is foamed material, surface is hard PVC by way of coextrusion
The co-extrusion building template product of material, the building template being prepared have high surface hardness, high static bending strength, the high elasticity of flexure
The advantages of modulus, high supine human body, water-tolerant, acidproof, alkaline-resisting, anticorrosion are repeated and are recycled, and improve feed back utilization
Rate.It is nontoxic using the equal Environmental Safety of auxiliary agent, side effect will not be generated in process of manufacture, therefore to human body and ring
Border does not constitute any harm, and Environmental Safety is reliable.
Specific embodiment
Below with reference to embodiment, the present invention is described in detail.The source of each raw material involved in the present invention arrived is as follows:
PVC is produced by the Xinjiang chemical inc Zhong Tai.
Plastic building template reclaimed materials is handling after the waste material that generates or use through milling in plastic building template production
Reclaimed materials, produced by Hailuo Section Bar Science & Technology Co., Ltd., Wuhu.
ACR processing aid is produced by Wuhu conch new material company, model CPPA-02 or CPPA-01.
Complex lead salt stabilizer model CPS-208T, Environment-friendlycalcium calcium zinc stabilizer model CZPS-02Z, by Wu Huhai
The production of spiral shell new material company.
Haloflex (CPE) is produced by Weifang Yaxing Chemical Co., Ltd., and anti-impact ACR is by U.S.'s ROHM AND HAAS public affairs
Department's production.
Light active calcium carbonate (lightweight, the calcium carbonate that handles through stearic acid activity) is distilled the limited public affairs of calcium industry by Chizhou City
Department's production or the production of same type auxiliary agent producer.
In-lubricant aliphatic alcohol ester model G60, in-lubricant monoglyceride model GMS, respectively by Hong Kong Corning grease
Work Co., Ltd and the production of Hangzhou Jin Cheng auxiliary agent Co., Ltd.
External lubricant Fischer-Tropsch wax model is respectively G22, external lubricant PE wax pattern BN208, respectively by Hong Kong Corning grease
Chemical Co., Ltd. and Qingdao Bang Ni company.
High-melting-point oxidized polyethylene wax model AC316A, is produced by Honeywell Int Inc..
Foaming control agent model K718 is produced by Weihai Jin Hong Chemical Co., Ltd..
Sodium bicarbonate is produced by Qingdao Alkali Industry Co., Ltd..
Azodicarbonamide model AC175, by upper sea light, abundant Chemical Co., Ltd. is produced.
Solid plasticizer model B-02, is produced by Jiangsu ATE Polymer Materials Co., Ltd..
" part " in the present embodiment refers to " parts by weight ".
Embodiment 1
A kind of PVC co-extrusion building template, including sandwich layer and the PVC coextruded layer for being covered on core layer surface, core layer formulation is such as
Shown in the following table 1, PVC co-extrusion layer formula is as shown in table 2 below.
The preparation method of the PVC co-extrusion building template, comprising the following steps:
(1) sandwich layer mixing puts the raw materials by formula and carries out mixing 400-500 seconds in Hot mixer, during heat is mixed
Through the moisture in hot mixing tide sufficiently removal mixture, to 110 DEG C of technological temperature after be discharged into cold mixing machine, cold mixed 300-400
Second, until 45 DEG C enter holding vessel after roots blower and reciprocating sieve removal foreign matter, and it is homogenized 24 hours, obtains sandwich layer mixture；
(2) PVC coextruded layer mixing is putted the raw materials by formula and is carried out mixing 450-550 seconds, humidity discharging in Hot mixer
After removing moisture removal, to 120 DEG C of technological temperature after be discharged into cold mixing machine, it is cold 300-400 seconds mixed；To 45 DEG C through roots blower and shake
It is dynamic to weed out except holding vessel, and homogenizing 24 hours are entered after foreign matter, obtain PVC coextruded layer mixture；
(3) sandwich layer mixture enters main extruder from hopper, and PVC coextruded layer mixture enters coextruder, with continuous
The temperature change that is occurred in ground Forward and extrusion process, material slowly from it is solid state transformed be viscous state, then respectively in cylinder area
After plasticizing, the compound extruded at die head, packed products are put in storage after, traction cooling by water tank, cutting.The parameter control of main extruder
System is as shown in table 3 below, the state modulator of coextruder is as shown in table 4 below.
Table 1
| Embodiment 1 | Embodiment 2 | Comparative example 1 | Comparative example 2 | |
| Template feed back | 110 | 135 | 110 | 135 |
| CPPA-01 | 2 | 1 | 0 | 5 |
| Light active calcium carbonate | 25 | / | 10 | 8 |
| K718 | 8 | 8 | 2 | 3 |
| AC316A | 0.4 | 0.4 | 0.8 | 0 |
| G60 | 0.4 | 0.4 | 0.2 | 0 |
| PE wax BN208 | 1 | 1.2 | 0 | 6.0 |
| CZPS-02Z | 2 | 2 | 0.5 | 6.2 |
| Sodium bicarbonate | 0.45 | 0.25 | 0.5 | 0 |
| AC foaming agent | 0.09 | 0.05 | 0 | 1.0 |
Table 2
| Embodiment 1 | Embodiment 2 | Comparative example 1 | Comparative example 2 | |
| PVC | 100 | 100 | 100 | 100 |
| Light active calcium carbonate | 30 | 25 | 0 | 10 |
| CZPS-02Z | 6 | 5 | 0.5 | 2.2 |
| CPE | 5 | 4 | 0 | 10 |
| Anti-impact ACR | 5 | 6 | 10 | 0 |
| CPPA-01 | 2 | 1 | 0.5 | 5.2 |
| B-02 | 2 | 0 | 3 | 0 |
| Calcium stearate | 0.5 | 1.0 | 0.2 | 0.5 |
| G60 | 1.5 | 0.8 | 2.7 | 0 |
Table 3
Table 4
Embodiment 2
A kind of PVC co-extrusion building template, including sandwich layer and the PVC coextruded layer for being covered on core layer surface, core layer formulation is such as
Shown in table 1, PVC co-extrusion layer formula is as shown in table 2.
The preparation method of the PVC co-extrusion building template, step with embodiment 1, the state modulator of main extruder such as table 3,
The state modulator of coextruder is as shown in table 4.
Comparative example 1
A kind of PVC co-extrusion building template, including sandwich layer and the PVC coextruded layer for being covered on core layer surface, core layer formulation is such as
Shown in table 1, PVC co-extrusion layer formula is as shown in table 2.
The preparation method of the PVC co-extrusion building template, step is with embodiment 1, and the state modulator of main extruder is the same as in table 3
Embodiment 1, coextruder state modulator with shown in the embodiment 1 in table 4.
Comparative example 2
A kind of PVC co-extrusion building template, including sandwich layer and the PVC coextruded layer for being covered on core layer surface, core layer formulation is such as
Shown in table 1, PVC co-extrusion layer formula is as shown in table 2.
The preparation method of the PVC co-extrusion building template, step is with embodiment 1, and the state modulator of main extruder is the same as in table 3
Embodiment 2, coextruder state modulator with shown in the embodiment 2 in table 4.
PVC building template performance prepared by each embodiment and comparative example is detected, it is as a result as follows
5 correlated performance of table and technical indicator test result
As can be seen from Table 5, the performance building template produced using Examples 1 and 2 formula is all satisfied national standard GB/T
29500-2013 building template wood-plastic clad plate and professional standard JG/T 418-2013 plastic formwork, and supine human body, quiet song
Intensity, product surface and the more existing foam template of sandwich layer hardness, Vicat softening point are obviously improved, and are conducive to improve current
The problems such as PVC building template warpage, screw is not tight painstakingly in work progress.
The above-mentioned detailed description carried out referring to embodiment to a kind of PVC co-extrusion building template and preparation method thereof, is explanation
Property without being restrictive, several embodiments can be enumerated according to limited range, therefore of the invention overall not departing from
Change and modification under design, should belong within protection scope of the present invention.
Claims (10)
1. a kind of PVC co-extrusion building template, which is characterized in that described including sandwich layer and the PVC coextruded layer for being covered on core layer surface
Sandwich layer includes the raw material of following parts by weight:
2. PVC co-extrusion building template according to claim 1, which is characterized in that the PVC coextruded layer includes following weight
The raw material of part:
3. PVC co-extrusion building template according to claim 1 or 2, which is characterized in that the trade mark of the PVC is the degree of polymerization
The S-700 that S-1000 or the degree of polymerization for 1000 are 700.
4. PVC co-extrusion building template according to claim 1 or 2, which is characterized in that the ACR processing aid is propylene
Acid esters analog copolymer；The heat stabilizer complex lead salt stabilizer or Environment-friendlycalcium calcium zinc stabilizer.
5. PVC co-extrusion building template according to claim 1 or 2, which is characterized in that the filler powdered whiting,
Light active calcium carbonate, talcum powder or wood powder.
6. PVC co-extrusion building template according to claim 1 or 2, which is characterized in that the in-lubricant is fatty alcohol
Ester, monoglyceride, high-melting-point oxidized polyethylene wax are one or more of；The external lubricant is high melting point polyethylene wax, Fischer-Tropsch wax, hard
One or more of resin acid calcium, low melting point oxidized polyethylene wax.
7. PVC co-extrusion building template according to claim 1 or 2, which is characterized in that the foaming control agent is molecular weight
The acrylic acid esters co-polymer of 500-600 ten thousand；The white hair infusion is sodium bicarbonate；The Huang foaming agent is two formyl of azo
Amine.
8. PVC co-extrusion building template according to claim 1 or 2, which is characterized in that the solid plasticizer is molecular weight
2000000 high-molecular-weight propylene acid esters analog copolymer；The impact modifier is haloflex and anti-impact ACR according to weight ratio
The mixture that 1:1~1.5 is formed.
9. the preparation method of PVC co-extrusion building template according to any one of claims 1 to 8, which is characterized in that including
Following steps:
(1) sandwich layer mixing is putted the raw materials into Hot mixer and is mixed by formula, after moisture removal is removed in humidity discharging, is discharged into cold mixed
In conjunction machine, after removing foreign matter, into holding vessel, and it is homogenized, obtains mixture；
(2) PVC coextruded layer mixing is putted the raw materials into Hot mixer and is mixed by formula, after moisture removal is removed in humidity discharging, row
Enter in cold mixing machine, after removing foreign matter, into holding vessel, and is homogenized, obtains mixture；
(3) sandwich layer mixture enters main extruder, and PVC coextruded layer mixture enters coextruder, coextruded layer and sandwich layer melt point
After the plasticizing of the area Bie Tong, the compound extruded at die head, packed products are put in storage after, traction cooling by water tank, cutting.
10. preparation method according to claim 9, which is characterized in that in step (3), the extruder is using 90
Parallel double-screw extruder, state modulator are as follows: 160-180 DEG C of 1 temperature of cylinder area；160-180 DEG C of 2 temperature of area of cylinder；3 temperature of cylinder area
160-180℃；160-180 DEG C of 4 temperature of area of cylinder；160-180 DEG C of 5 temperature of area of cylinder；160-180 DEG C of 6 temperature of area of cylinder；Connect temperature
160-180℃；160-180 DEG C of temperature of mould area；Screw speed 16-20rpm；Charging rate 40-55rpm；Hauling speed 0.5-
0.8m/min；Load 45-65%.
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| CN110157117A (en) * | 2019-05-31 | 2019-08-23 | 芜湖海螺型材科技股份有限公司 | One kind having ultralow shrinking percentage floor heating ecological floor and preparation method thereof |
| CN110591249A (en) * | 2019-09-09 | 2019-12-20 | 界首市亚鑫塑业科技有限公司 | Processing technology of hollow building template |
| CN111267440A (en) * | 2020-03-23 | 2020-06-12 | 芜湖海螺型材科技股份有限公司 | Scratch-resistant ecological floor and preparation method thereof |
| CN112248591A (en) * | 2020-10-20 | 2021-01-22 | 蒙城县欣瑞特建材有限公司 | PVC co-extruded sheet and processing technology thereof |
| CN114350084A (en) * | 2022-01-10 | 2022-04-15 | 山东绿保塑胶有限公司 | Novel PVC plastic building template and production process thereof |
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