CN105086232B - PVC base and preparation method thereof and PVC composite boards - Google Patents
PVC base and preparation method thereof and PVC composite boards Download PDFInfo
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Abstract
The invention discloses a kind of PVC base and preparation method thereof and PVC composite boards, wherein, PVC base includes following raw materials in parts by weight：60 80 parts of PVC, heavy sodium carbonate, 3 10 parts of stabilizer, 0.5 2 parts of lubricant of balance, 0.5 2 parts of foaming agent, 5 10 parts of foaming control agent；Wherein, PVC include SG 5 type PVC and SG 8 the ratio of weight and number of type PVC, PVC and heavy sodium carbonate be 1：1‑1.3.PVC composite boards include PVC base and the semi-rigid layer of PVC positioned at substrate surface.Advantage has good continuous extrusion ability in production for the PVC base of the present invention, and gained substrate characteristics continuous-stable, tensile strength, the impact strength of base material are very good, and dimensional contraction rate is smaller；The PVC composite boards of the present invention are compared with existing product than having higher mechanical strength and longer service life.
Description
Technical field
The present invention relates to a kind of sheet material and preparation method thereof, more particularly to a kind of PVC base and preparation method thereof to answer with PVC
Plywood material.
Background technology
Sheet material is widely used in household manufacture, building with its wide material sources, the good characteristic such as species is various, is easily worked
The field such as industry and processing industry.For molding structure, sheet material can be roughly divided into solid wood board, clamping plate, wood-plastic board, glued board and
Decoration panel etc..
But existing sheet material has problems, such as wood-plastic board, it is one the advantages of one kind collects timber and plastics that it, which is,
The advanced composite material (ACM) of body, wherein, " wood " is selected from waste and old wood, wood powder, wood-fibred, sawdust or stalk etc., and " modeling " can be poly-
In the polymer such as ethene, polypropylene, polystyrene, polyvinyl chloride, then it is aided with several additives, using modernization process production
.Nowadays, wood-plastic board with its longer service life, stronger plasticity, environment protection health, realize that resource regeneration etc. is many
Advantage and the deep extensive concern by domestic and international market；Wherein, the demand using America ＆ Canada as the European ＆ American Market of representative continues
Increase, it is mainly used on harbour, railway, building doors and windows and indoor furniture；In the state that Asia, especially economy are more flourishing
Family, such as Japan, the generally use wood-plastic clad plate on Wharf Construction, floor and indoor furniture.However, existing wood-plastic board is more
Containing wood powder, there is many hidden danger in wood powder, such as be easier to make moist, be on fire in transport, storage and during keeping, or even easily
Produce formaldehyde pollution；Meanwhile the material containing wood powder is not sufficiently stable in extrusion, easily there is blanking difficulty and mould thickener
Phenomenon.In addition, other sheet materials there is also performance it is bad, be not easy the problems such as processing and fabricating.
It would therefore be highly desirable to solves above-mentioned technical barrier.
The content of the invention
Goal of the invention：The first object of the present invention, which is to provide, a kind of possesses preferable mechanical property and long service life
PVC base；
The second object of the present invention is to provide the preparation method of the PVC base；
The third object of the present invention is to provide a kind of PVC composite plates, and the composite plate is prepared using PVC base.
Technical scheme：PVC base of the present invention, in parts by weight including following raw materials：PVC 60-80 parts, heavy
Sodium carbonate, stabilizer 3-10 parts, balance lubricant 0.5-2 parts, foaming agent 0.5-2 parts, foaming control agent 5-10 parts；Wherein, PVC
Ratio of weight and number including SG-5 type PVC and SG-8 type PVC, PVC and heavy sodium carbonate is 1：1-1.3.
SG-5 type PVC and SG-8 types PVC is used in mixed way by the present invention, can improve the mechanical property of base material；Preferably, SG-5
Type PVC is 25-50 parts, and SG-8 types PVC is 50-25 parts.Meanwhile PVC of the invention is preferably 70-75 parts.
The heavy sodium carbonate particle diameter that the present invention uses is 800-1250 mesh；Its parts by weight is preferably 80-100 parts.
The balance lubricant includes in-lubricant and external lubricant.
Present invention additionally comprises impact modifier.
The preparation method of PVC base of the present invention, comprises the following steps：Prepare raw material by weight ratio, carry out successively
Mixed at high speed, cooling material, maturation process, extrusion, foam and cooling and shaping, obtain PVC base.
PVC composite boards of the present invention, including above-mentioned PVC base and the semi-rigid layer of PVC positioned at substrate surface.
Beneficial effect：Compared with prior art, its remarkable advantage is the present invention：The PVC base of the present invention has in production
There is good continuous extrusion ability, gained substrate characteristics continuous-stable, tensile strength, the impact strength of base material are very good,
Dimensional contraction rate is smaller；The PVC composite boards of the present invention are compared with existing product than having higher mechanical strength and longer use longevity
Life.
Embodiment
Technical scheme is described further with reference to embodiment.
The invention provides a kind of PVC base, in parts by weight including following raw materials：PVC 60-80 parts, heavy carbonic acid
Sodium, stabilizer 3-10 parts, balance lubricant 0.5-2 parts, foaming agent 0.5-2 parts, foaming control agent 5-10 parts；Wherein, PVC includes
The ratio of weight and number of SG-5 type PVC and SG-8 type PVC, PVC and heavy sodium carbonate is 1：1-1.3.
The polyvinyl chloride resin of the present invention includes SG-5 types and SG-8 types；Wherein, SG-5 averagely gathers compared with SG-8 with higher
Right and viscosity, " higher average degree of polymerization " here mean more preferable mechanical property；But with the rise material of the degree of polymerization
Plasticizing, which can become difficult, resin gelation degree, to be reduced, and base material foamed board of the invention needs resin to be wrapped under conditions of melting
Certain gas is wrapped, it is necessary to certain degree of plasticification；If all using SG-5 type resins, Plastic is difficult, causes base material thing
Hydraulic performance decline is managed, therefore in order to ensure that material normally plastifies, present invention selection is used in mixed way using SG-5 types and SG-8 type resins,
And the thermal dimensional stability of base material can be improved with SG-5 replacements part SG-8, while there is relatively low heat shrink rate and heating
Warpage, the present invention in SG-5 resins additions can improve floor falcon groove overlap tensile strength, improve the use on floor
Life-span.Preferably, SG-5 types PVC is 25-50 parts, and SG-8 types PVC is 50-25 parts., can when SG-5 types content is less than SG-8 types
To obtain the relatively lower base material of density, and the toughness of gained base material is preferable, is suitably applied 10mm thickness above flooring products；
When SG-5 types content is higher than SG-8 types, gained rigidity of base material is preferable, and the overlap joint stretching of lifting floor falcon groove that can be higher is strong
Degree, therefore it is more suitably applied to the following flooring product of 6mm thickness.
Prior art is when producing floor, especially wood moulding bottom plate, because what is selected is precipitated calcium carbonate as filler, with
Strengthen the hardness of sheet material, but occur uneven, mould thickener is frequent etc. is fed caused by production material is built bridge in production
Defect, reason of searching to the bottom are that extruder precipitated calcium carbonate diameter is small, and easily being attracted each other between particle produces agglomerate.But
It is that in the past common powdered whiting is ultra-fine from 800-1250 mesh in of the invention because of the excessive unsuitable extruder production of diameter
Powdered whiting, its be by extra-fine grinding and comminution by gas stream processing, than precipitated calcium carbonate have good mobility,
Processing fluidity is substantially better than precipitated calcium carbonate.Powdered whiting primarily serves reinforcement and the effect of filler in formula, because of it
Main Morphology is inorganic rigid particle, small with respect to PVC molecular mobilities and deformability, and the calcium carbonate molecule of fine grain can
Further reduce its segment deformability in embedded PVC strands, play a part of reinforcement.The above mechanism of action is determined with emphatically
The lifting of the content of matter calcium carbonate is the trend first gone up and then down to substrate performance.Preferably, powdered whiting is in material
Content be 80-100 parts, by experiment repeatedly, the content of powdered whiting is preferably 85-95 parts in the present invention.
The balance lubricant of the present invention includes in-lubricant and external lubricant.Wherein, in-lubricant is mainly used in instrumentality
The mobility of material, beneficial to processing, it can be G60,3316A etc., and effect is similar, and the content in material is 0.6-0.8 parts, is entered
One step is preferably 0.7-0.75 parts.External lubricant is mainly easy to the extrusion of material, improves processing efficiency, can be PE waxes, also known as
Tissuemat E, can also be 1801, its effect is similar, and both can be used alone, and it is similar to be used alone or as a mixture effect, in material
In content be 0.2-0.5 parts, preferably 0.25-0.4 parts.
The stabilizer of the present invention is heat stabilizer, can prevent PVC thermal degradations, such as can be calcium-zinc composite stabilizing agent, type
Number for LY21, YQ102, CZ96 etc., effect is similar.Content of the stabilizer in material is preferably 6-7 parts.
The foaming agent of the present invention is AC foaming agents and/or sodium bicarbonate, wherein, content of the AC foaming agents in material is 0.3-
0.5 part, content of the sodium bicarbonate in material is 0.5-0.7 parts.
The foaming control agent of the present invention is used to adjust foaming agent foam, promotes PVC plastic, improves PVC melt temperatures, prevents
Bubble merges or rupture, and foaming control agent can be LP-90, LS530, K400, and effect is identical, and only addition is had any different, preferably
, content of the foaming control agent in material is 6-7 parts.
Present invention additionally comprises impact modifier, it is mainly used in increasing the toughness and hardness of PVC base, such as ACR, You Mingbing
Olefin(e) acid ester, its content in material are 4-6 parts.
Present invention also offers the preparation method of PVC base, comprise the following steps：Prepare raw material by weight ratio, successively
Mixed at high speed, cooling material, maturation process, extrusion, foam and cooling and shaping are carried out, obtains PVC base.
Specifically include：(1) production material is blended：Raw material is put into high-speed mixer by recipe requirements, according to 1000-
1300rpm rotating speed mixing 10-15min reach 100-110 DEG C to temperature of charge, then drop temperature of charge by cooling down batch mixer
To 30-35 DEG C, material bagging is subjected to maturation process 12-24h after the completion of cooling.(2) prepared by sheet material：By the production material after curing
Extruder is added, such as can be conical double screw extruder (machine barrel and mold temperature set be 150-170 DEG C), by foaming
Skinning machine and cooling calibrator cooling and shaping, finally cut into plate, as PVC base.
Semi-rigid layer of PVC is set in PVC base of the present invention, with regard to that can obtain PVC composite boards.
The semi-rigid layer of PVC of the present invention includes：SG-5 type PVC 100-150 parts, powdered whiting 350-450 parts, calcium zinc
Compound stabilizer 3-4 parts and DOTP (DOTP) 30-40 parts, using percentage by weight to count.Due to semihard
Matter layer is calendering formation, not high to calcium carbonate fineness requirement, so " powdered whiting " particle therein is thicker, particle diameter can be
160 mesh or so.
The preparation method of semi-rigid layer of PVC of the present invention includes：(1) production material is blended：It is first according to the amount of recipe requirements
Powdered whiting, calcium-zinc composite stabilizing agent, polyvinyl chloride resin, DOTP are disposably all put into high-speed mixer, when the mixed temperature of heat arrives
Blowing mixes to cold mixer after up to 85-100 DEG C, and to ensure the uniformity coefficient of batch mixing, cold do time is set as 15min, after the completion of
Material is discharged into stock chest.(2) banburying：The good material of banburying can be pushed into mill after banburying 6min.(3) mill：Mill
Machine temperature is set as 170-180 DEG C, and the mill time requires without fixed, need to expect that situation is true by mill rotating speed and calender production
It is fixed.(4) roll：Calendering four-roller roll spacing is set as 1-2mm, 170 DEG C of temperature, and speed is adjusted than being defined by 0.9-1.2 between each roller,
The dimensional contraction rate that its middling speed compares layer of PVC has large effect, need to strictly control.(5) sizing cutting：When egative film thickness meets
It is required that rear haulage to chill roll is shaped, required size is cut into.
Embodiment 1：The preparation of PVC base
Raw material：25 parts of SG-5 types PVC, 50 parts of SG-8 types PVC, 1,250 90 parts of mesh heavy sodium carbonate, Ca Zn composite are stable
5 parts of agent (LY21), 0.75 part of in-lubricant (G60), 0.35 part of external lubricant (PE waxes), 0.45 part of AC foaming agents, sodium bicarbonate 0.6
Part, 6 parts of foaming control agent (LP-90).
Wherein, SG-5 types PVC is purchased from safe in Anhui, and SG-8 types PVC is purchased from Jurong star purchased from the real China in Dezhou, powdered whiting
Occasion stone flour, LY21 are purchased from U.S. Honeywell, and G60 is purchased from Kunshan Mai Jisen, and PE waxes are purchased from German BASF, and AC foaming agents are purchased from
Kunshan Mai Jisen, sodium bicarbonate are purchased from Kunshan Mai Jisen, and LP-90 is purchased from Shandong Rui Feng macromolecules.
Preparation method：Raw material is put into high-speed mixer by above-mentioned formula, according to 1000rpm rotating speed mixing 10min to thing
Material temperature degree reaches 100 DEG C, then temperature of charge is down to 30 DEG C by cooling down batch mixer, carries out material bagging after the completion of cooling
Maturation process 12h.Production material after curing is added into conical double screw extruder (machine barrel and mold temperature set be 150 DEG C),
By skinning machine and the cooling calibrator cooling and shaping of foaming, plate, as PVC base are finally cut into.
Embodiment 2：The preparation of PVC base
Raw material：50 parts of SG-5 types PVC, 25 parts of SG-8 types PVC, 800 85 parts of mesh heavy sodium carbonate, calcium-zinc composite stabilizing agent
(YQ102) 3 parts, 0.6 part of in-lubricant (3316A), (1801) 0.2 parts of external lubricant, 0.5 part of AC foaming agents, foaming control agent
(LS530) 7 parts.
Wherein, YQ102 is purchased from U.S. Honeywell, and 3316A is purchased from U.S. Honeywell, and 1801 are purchased from Kunshan Mai Jisen,
LS530 is purchased from auspicious rich macromolecule.
Preparation method：Raw material is put into high-speed mixer by above-mentioned formula, according to 1300rpm rotating speed mixing 15min to thing
Material temperature degree reaches 110 DEG C, then temperature of charge is down to 35 DEG C by cooling down batch mixer, carries out material bagging after the completion of cooling
Maturation process 20h.Production material after curing is added into conical double screw extruder (machine barrel and mold temperature set be 170 DEG C),
By skinning machine and the cooling calibrator cooling and shaping of foaming, plate, as PVC base are finally cut into.
Embodiment 3：The preparation of PVC base
Raw material：35 parts of SG-5 types PVC, 40 parts of SG-8 types PVC, 1,000 95 parts of mesh heavy sodium carbonate, Ca Zn composite are stable
5 parts of agent (CZ96), 0.8 part of in-lubricant (G60), 0.5 part of external lubricant (PE waxes), 0.3 part of AC foaming agents, 0.5 part of sodium bicarbonate,
6 parts of foaming control agent (K400).
Wherein, CZ96 is purchased from U.S. Honeywell, and K400 is purchased from Kunshan Mai Jisen.
Preparation method：Raw material is put into high-speed mixer by above-mentioned formula, according to 1200rpm rotating speed mixing 12min to thing
Material temperature degree reaches 105 DEG C, then temperature of charge is down to 32 DEG C by cooling down batch mixer, carries out material bagging after the completion of cooling
Maturation process 24h.Production material after curing is added into conical double screw extruder (machine barrel and mold temperature set be 165 DEG C),
By skinning machine and the cooling calibrator cooling and shaping of foaming, plate, as PVC base are finally cut into.
PVC base performance comparison table prepared by the embodiment 1-3 of table 1
Embodiment 4：
Raw material：Substantially the same manner as Example 1, difference is：" 25 parts of SG-5 types PVC, 50 parts of SG-8 types PVC " is replaced
It is changed to " 75 parts of SG-5 types PVC ".
Preparation method is same as Example 1.
Embodiment 5：
Raw material：Substantially the same manner as Example 1, difference is：" 25 parts of SG-5 types PVC, 50 parts of SG-8 types PVC " is replaced
It is changed to " 75 parts of SG-8 types PVC ".
Preparation method is same as Example 1.
Embodiment 6：
Raw material：Substantially the same manner as Example 1, difference is：" 1250 mesh heavy sodium carbonate " is replaced with into " lightweight carbonic acid
Sodium ".
Preparation method is same as Example 1.
PVC base performance comparison table prepared by the embodiment 4-6 of table 2
Embodiment 7：
Raw material：PVC includes SG-5 and SG-8, and contents of the SG-5 in material is less than contents of the SG-8 in material；
1250 90 parts of mesh heavy sodium carbonate, 5 parts of calcium-zinc composite stabilizing agent, 0.75 part of in-lubricant (G60), external lubricant (PE waxes) 0.35
Part, 0.45 part of AC foaming agents, 0.6 part of sodium bicarbonate, 6 parts of foaming control agent (LP-90).
Design 8 groups of parallel tests, PVC total contents be respectively 50 parts, 55 parts, 60 parts, 70 parts, 75 parts, 80 parts, 90 parts and
100 parts.
Preparation method is same as Example 1.
The polyvinyl chloride resin of the different content of table 3 makees the substrate performance contrast table of raw material preparation
Embodiment 8：
Raw material：25 parts of SG-5 types PVC, 50 parts of SG-8 types PVC, 90 parts of heavy sodium carbonate, 5 parts of calcium-zinc composite stabilizing agent,
0.75 part of in-lubricant (G60), 0.35 part of external lubricant (PE waxes), 0.45 part of AC foaming agents, 0.6 part of sodium bicarbonate, foaming regulation
6 parts of agent (LP-90).
Design 8 groups of parallel tests, heavy sodium carbonate particle diameter be respectively 600 mesh, 700 mesh, 800 mesh, 900 mesh, 1000 mesh,
1250 mesh, 1300 mesh, 1400 mesh.
Preparation method is same as Example 1.
The heavy sodium carbonate of the different-grain diameter of table 4 makees the substrate performance contrast table of raw material preparation
Embodiment 9：
Raw material：25 parts of SG-5 types PVC, 50 parts of SG-8 types PVC, 1250 mesh heavy sodium carbonate, calcium-zinc composite stabilizing agent 5
Part, 0.75 part of in-lubricant (G60), 0.35 part of external lubricant (PE waxes), 0.45 part of AC foaming agents, 0.6 part of sodium bicarbonate, foaming are adjusted
Save 6 parts of agent (LP-90).
Design 8 groups of parallel tests, heavy carbonate content is respectively 70 parts, 75 parts, 80 parts, 85 parts, 90 parts, 95 parts, 100
Part, 110 parts.
Preparation method is same as Example 1.
The different heavy carbonate content of table 5 makees the substrate performance contrast table of raw material preparation
Embodiment 10：Semi-rigid PVC preparation
Raw material：120 parts of SG-5 types PVC, 400 parts of powdered whiting, 4 parts of calcium-zinc composite stabilizing agent and terephthalic acid (TPA)
35 parts of dioctyl ester (DOTP), using percentage by weight to count.
Preparation method：Above-mentioned material is disposably all put into high-speed mixer, blowing after the mixed temperature of heat reaches 90 DEG C
Mixed to cold mixer, to ensure the uniformity coefficient of batch mixing, cold do time be set as 15min, after the completion of material is discharged into stock chest.
Then start banburying, the good material of banburying mill can be pushed into after 6min.Then mill is started：Mill temperature is set as
175 DEG C, the mill time requires without fixed, need to expect that situation determines by mill rotating speed and calender production.Next start to roll：
Calendering four-roller roll spacing is set as 2mm, 170 DEG C of temperature, and speed is adjusted than being defined by 1.0 between each roller, and its middling speed compares layer of PVC
Dimensional contraction rate has large effect, need to strictly control.Finally carry out sizing cutting：When egative film thickness meets the requirements rear haulage extremely
Chill roll is shaped, and is cut into required size.
Embodiment 11：The preparation of PVC composite plates
Semi-rigid PVC prepared by embodiment 10 is fitted in substrate surface prepared by embodiment 1, specially in substrate surface
Semi-rigid PVC is bonded after roller coating glue, passes through cutting after normal temperature pressurize 20h again, cut lock, obtain PVC composite plates, and to its property
It can be tested, as a result such as table 6.
PVC composite plate the performance test results prepared by the embodiment 11 of table 6
As table 6 understands that PVC composite boards have preferable mechanical property and good shrinkage made from the present embodiment
Energy：Falcon groove overlap joint tensile strength is high, warpage and heat shrink rate are small.The PVC composite boards have moderate density simultaneously, compared with
Low residual indentation degree and water absorption rate, excellent surface abrasion resistance, scratch resistance, combination property are better than other like products.
Claims (9)
1. a kind of PVC base, it is characterised in that in parts by weight including following raw materials：It is PVC60-80 parts, powdered whiting, steady
Determine agent 3-10 parts, balance lubricant 0.5-2 parts, foaming agent 0.5-2 parts, foaming control agent 5-10 parts；Wherein, PVC includes SG-5
The ratio of weight and number of type PVC and SG-8 type PVC, PVC and powdered whiting is 1：1.13-1.27.
2. PVC base according to claim 1, it is characterised in that：The SG-5 types PVC is 25-50 parts, SG-8 types PVC
For 50-25 parts.
3. PVC base according to claim 1, it is characterised in that：The PVC is 70-75 parts.
4. PVC base according to claim 1, it is characterised in that：The particle diameter of the powdered whiting is 800-1250 mesh.
5. PVC base according to claim 1, it is characterised in that：The powdered whiting is 80-100 parts.
6. PVC base according to claim 1, it is characterised in that：The balance lubricant includes in-lubricant and outer profit
Lubrication prescription.
7. PVC base according to claim 1, it is characterised in that：Also include impact modifier.
8. the preparation method of PVC base according to claim 1, it is characterised in that comprise the following steps：
Prepare raw material by weight ratio, carry out mixed at high speed, cooling material, maturation process, extrusion, foam and cold successively
But shape, obtain PVC base.
A kind of 9. PVC composite boards, it is characterised in that the semi-rigid layer of PVC including PVC base and positioned at substrate surface；Wherein,
The PVC bases that the PVC base is prepared for the PVC base described in claim any one of 1-7 or claim 8 methods described
Material.
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| CN109910413B (en) * | 2019-03-18 | 2021-09-03 | 中权建投科技(北京)有限公司 | PVC co-extruded sheet material and manufacturing method thereof |
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|---|---|
| CN105086232A (en) | 2015-11-25 |
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