CN109721800A - A kind of talcum powder enhancing HDPE composite and its preparation method and application - Google Patents
A kind of talcum powder enhancing HDPE composite and its preparation method and application Download PDFInfo
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- CN109721800A CN109721800A CN201910068472.3A CN201910068472A CN109721800A CN 109721800 A CN109721800 A CN 109721800A CN 201910068472 A CN201910068472 A CN 201910068472A CN 109721800 A CN109721800 A CN 109721800A
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Abstract
The present invention provides a kind of talcum powder enhancing HDPE composites and its preparation method and application.The preparation method of talcum powder enhancing HDPE composite of the present invention, comprising the following steps: talcum powder is modified, modified talc powder is obtained；HDPE is modified using the modified talc powder, obtains modified HDPE；Wherein, talcum powder is modified including chemical modification, the chemical modification includes being modified processing to talcum powder using coupling agent；The talcum powder is platy talc, and handles by dealkalize.Wherein, the purpose of dealkalize processing is to remove talcum powder surface to be not easy substance with organic compound and/or resin-bonded.The mechanical performance of talcum powder enhancing HDPE composite of the present invention is significantly promoted, and has important research significance and application value in the manufacture field of recycled plastic.
Description
Technical field
The present invention relates to the technical fields of plastic recycling, multiple in particular to a kind of talcum powder enhancing HDPE
Condensation material and its preparation method and application.
Background technique
With the rapid development of plastics industry, the recycling and reusing of waste plastic is energy saving as one, protects environment
Measure, be generally taken seriously.Currently, main both at home and abroad using landfill and the methods of burn and to handle waste plastic, using time
The less of recycling is received, and the recovery and utilization technology level of domestic waste plastic is also relatively backward.
High density polyethylene (HDPE) (HDPE) be it is a kind of by ethylene copolymer generate thermoplastic polyolefin and plastic material library return
It closes the fastest-rising a kind of plastics in field, there is easily reprocessing this is mainly due to HDPE, characteristic difficult to degrade and have a wide range of application
Etc. advantages.However the HDPE material of recycling, intensity is lower, is easy breakage, has some limitations in use.
There is the problems such as performance boost amplitude is lower, especially bending strength mostly in the existing method being modified to HDPE
Be unable to satisfy certain specific application demands, such as prepare pallet etc..
In view of this, the present invention is specifically proposed.
Summary of the invention
The first object of the present invention is to provide a kind of talcum powder enhancing HDPE composite, the talcum powder enhancing HDPE
Composite material, intensity and bending property with higher.
The second object of the present invention is to provide a kind of preparation method of talcum powder enhancing HDPE composite, this method work
Skill is simple, at low cost, high production efficiency, is suitable for large-scale production.
The third object of the present invention is to provide a kind of application of talcum powder enhancing HDPE composite, the talcum powder increasing
Strong HDPE can be used in preparing the plastic products such as packaging material, container, pallet, tubing, be particularly suitable for preparing pallet.
In order to realize above-mentioned purpose of the invention, the following technical scheme is adopted:
A kind of preparation method of talcum powder enhancing HDPE composite, comprising:
Talcum powder is modified, modified talc powder is obtained；
HDPE is modified using the modified talc powder, obtains modified HDPE；
Wherein, talcum powder is modified including chemical modification, the chemical modification includes using coupling agent to talcum powder
It is modified processing；
Preferably, the talcum powder is platy talc；
Preferably, the talcum powder is handled by dealkalize；
Preferably, being modified to talcum powder further includes physical modification, and the physical modification includes carrying out machine to talcum powder
Tool stirring；
Preferably, talcum powder is modified, comprising: under mechanical agitation, the coupling agent is sprayed into mist
In talcum powder；
When the prior art is modified HDPE using talcum powder, used again after usually mixing talcum powder with HDPE
Coupling agent is modified；The study found that aforesaid way is poor to the modified effect of HDPE, the performance boost amplitude of modified material compared with
Low, reason may is that and first mix to talcum powder with HDPE, and may cause subsequent coupling agent can not completely or thoroughly
Talcum powder and HDPE are coupled, there may be the states directly contacted with HDPE for part talcum powder, and then talcum powder can not
Play the modifying functions such as the enhancing to HDPE.
Method of the invention first carries out chemical modification, after being chemically modified, the fully wrapped around talcum of coupling agent to talcum powder
Powder, to obtain modified talc powder；When subsequent use modified talc powder is modified HDPE, on the one hand it can avoid sliding in system
On the other hand the assembly of mountain flour particle and the sharply thickening of HDPE also can be improved HDPE to the wetability of talcum powder, pass through carbon
Functional silane coupling agent can also make talcum powder and HDPE realize secure bond, can further effectively improve talcum powder to HDPE's
Modifying function.
Talcum powder of the present invention is platy talc, and draw ratio is high, large specific surface area, can effective reinforced resin it is rigid
Property and bending property.The present inventors have additionally discovered that when being modified processing to talcum powder, the preferential talcum powder for choosing dealkalize,
It can remove talcum powder surface and be not easy the substance with organic compound and/or resin-bonded, coupling agent can be effectively improved to cunning
The covered effect of mountain flour further can effectively enhance the interface affinity of modified talc powder and resin, further can be improved compound
The mechanical performance of material.
Further, being modified to talcum powder further includes physical modification, and the physical modification includes carrying out to talcum powder
Mechanical stirring；Mechanical stirring is conducive to make that sliding occurs in the talcum powder of layer structure between adjacent two layers or is mutually disengaged, than
Surface area increases, in the rigidity for when being modified HDPE, being conducive to improve HDPE and its creep resistance at high temperature
Energy and bending property.
Preferably, controlling the quality proportioning between HDPE, talcum powder and coupling agent is (65~90): (5~30): (0.5
~5)；
Preferably, the quality proportioning controlled between HDPE, talcum powder and coupling agent is (67~75): (20~30): (1~
3)；
Preferably, the talcum powder is the talcum powder of 800 and/or 1250 mesh.
The present inventor obtains by numerous studies, the quality proportioning between control HDPE, talcum powder and coupling agent be (65~
90): (5~30): (0.5~5), tensile strength, impact strength and the bending strength of talcum powder enhancing HDPE composite mention
Height, needed for the preparation that common plastics product can be met；It is further preferred that by the quality between HDPE, talcum powder and coupling agent
Burden control is (67~75): (20~30): when (1~3), modified effect is more preferable, and talcum powder enhances the power of HDPE composite
It is more significant to learn performance raising, can be used for preparing to the higher plastic product of raw material mechanical property requirements.
High density polyethylene (HDPE) (HDPE) belongs to environmental-protecting material, and heating reaches fusing point, can recycling and reusing.HDPE is plastic cement
Raw material storage recycles the fastest-rising a part in market, and main cause is HDPE with easily reprocessing, characteristic difficult to degrade and using model
Enclose the advantages such as wide.However the HDPE material of recycling, tensile strength and bending strength are all lower, are easy breakage, in use
It has some limitations.
In a kind of preparation method of talcum powder enhancing HDPE composite of the present invention, the preparation side of modified HDPE
Method includes: blending and granulation；Preferably, it is granulated after blending；Due to modified talc powder and the interface HDPE in Blending Processes
Between compatibility enhancing, realize modified talc powder and the physical dispersion of HDPE；When granulation, under high temperature, high shear,
Carbon functional silane coupling agent can also make talcum powder and HDPE realize secure bond, realize talcum powder to the chemical modification of HDPE；It is excellent
Selection of land, the raw material further include toughener；Preferably, toughener is added when being granulated.In the present invention, the modified HDPE is
Talcum powder enhances HDPE composite.
Inventor is by a large amount of the study found that when the additive amount of talcum powder increases, and the elongation at break of HDPE is
It reduces, the toughness of material slightly declines, and the talcum powder enhancing HDPE composite material thus prepared can be used for preparing to the strong of material
Degree, the demanding plastic product of bending property；When a small amount of toughener is added, this phenomenon can be improved, extension at break
Rate is gone up, and composite material toughness is gone up, and the talcum powder enhancing HDPE composite thus prepared can be used for preparing to material
Intensity, bending property and the high plastic product of toughness reguirements.
Preferably, the toughener is at least one of POE, EVA, SBS, ABS, more preferably POE.Preferably, exist
Toughener is added when granulation；Preferably, the quality proportioning for controlling HDPE and toughener is (70~85): (3~5)；Preferably, institute
It states toughener and is selected from least one of POE, EVA, SBS and ABS, more preferably POE.
The present invention does not limit coupling agent strictly, and the coupling agent can for example be coupled for silane coupling agent, titanate esters
At least one of agent, preferably silane coupling agent.
The general formula of silane coupling agent is RSiX3, R represents amino, sulfydryl, vinyl, epoxy group, cyano and methyl-prop in formula
The groups such as alkene acyloxy, these groups and different matrix resins all have stronger respond, and X represents the alkane that can be hydrolyzed
Oxygroup, such as methoxyl group, ethyoxyl.
Titanate coupling agent all has preferable coupling in the filler systems such as thermoplastic, thermosetting plastics and rubber
Effect.Titanate coupling agent is broadly divided into four classes by its structure: monoalkoxy type, monoalkoxy pyrophosphoric acid ester type, integrated
With coordination figure.The general structure of monoalkoxy type coupling agent are as follows: RO-Ti (OX-R '-Y)3.Phosphorous acyloxy can provide antioxygen,
Firing resistance etc., therefore by the selection of OX-, titanate esters can be made to have both coupling and other properties；R '-is long carbon key
Alkyl, it is softer, can carry out bending entanglement with organic polymer, change the compatibility of organic matter and inorganic matter
It is kind, improve the impact strength of material；Y is hydroxyl, amino, epoxy group or double bond containing group etc., these groups are connected to titanium
The end of acid ester molecules can be chemically reacted with organic matter and is combined together.
Preferably, the coupling agent is liquid coupling agent；
Preferably, the coupling agent be solids coupling agent, the chemical modification include: the solids coupling agent is dissolved in it is molten
Agent obtains coupling agent solution；Chemical modification processing is carried out to the talcum powder through physical modification using the coupling agent solution.
Preferably, the silane coupling agent is for when preparing silane coupler solution, the solvent to be selected from ethyl alcohol, isopropanol
At least one of with deionized water；It is further preferred that the concentration of silane coupler solution is 0.5~1%；
The present inventor is by repeatedly the study found that change talcum powder using the silane coupling agent in above-mentioned concentration range
Property processing, it can be achieved that cladding to most talcum powder, covered effect is good, to substantially increase modified talc powder and resin
Interface affinity, can further effectively improve the mechanical performance of resin.When silane coupling agent concentration is larger, system viscosity
Greatly, the bad dispersibility of silane coupling agent, is not easy to realize the cladding to talcum powder, and the compatibility of modified talc powder and resin is general,
Further affect the modified effect to resin；When silane coupling agent concentration is too low, silane coupled agent content is few, to talcum powder
Cladding degree it is low, the compatibility of modified talc powder and resin surface is also bad.
Preferably, the titanate coupling agent is for when preparing titanate coupling agent solution, the solvent to be atoleine；
It is further preferred that the mass ratio of titanate coupling agent, solvent is 1~2:1~2.
The using effect of coupling agent is also related with the application method of coupling agent and condition, and this invention takes first to talcum powder
The mode being blended after being surface-treated with HDPE.This processing method is by coupling agent by inorganic filler and two boundary of polymer
Face combines, to obtain optimal wetting value and dispersibility.Coupling agent need to be diluted to weak solution by surface preparation, in favor of
It is come into full contact with surface processed.
HDPE has easily reprocessing, characteristic difficult to degrade and the advantages such as have a wide range of application, however due to the HDPE intensity of recycling
The defects of insufficient with toughness, limits its reference.Method of modifying of the present invention can obviously improve the mechanical performance of Recycled HDPE
The problems such as decline.HDPE of the present invention is Recycled HDPE；Preferably, the tensile strength of the Recycled HDPE is 16-25MPa；
Elongation at break is 200-800%；Impact strength is 6-8KJ/m2；Bending strength is 800-1200MPa.
During the physical modification of talcum powder of the present invention, control the churned mechanically speed be 180~
220rpm, mixing time 2-5min, whipping temp are 20~30 DEG C, preferably 25 DEG C；
Mechanical stirring is conducive to make the layer structure of talcum powder to slide, thus increase the specific surface area of talcum powder, into
One step can be realized later period coupling agent to the abundant package of talcum powder.Mixing speed is preferably moderate, make the dispersibility of talcum powder it is best,
Coupling agent is preferably advisable to the package effect of talcum powder.
Under mechanical agitation, coupling agent is added, realizes coupling agent to the package of the talcum powder lamella of uniform dispersion.Institute
It states the method that coupling agent takes mist to spray to spray into talcum powder, largely improves the contact surface of talcum powder and coupling agent solution
Product, improves covered effect, enhances compatibility, the wetability of modified talc powder and polymer interface, significantly enhance compound
The mechanical performance of material.
In the preparation process of modified HDPE of the present invention, before being granulated, first talcum powder and HDPE should be total to
Mixed, the blending includes: that HDPE is added in modified talc powder；Preferably, described be blended further includes mechanical stirring；Preferably,
Controlling churned mechanically speed is 180~220rpm, and mixing time is 8~15min, and whipping temp is 20~30 DEG C, preferably
25℃.In Blending Processes, mechanical stirring can promote modified talc powder and HDPE it is further it is uniform mix, realize modified talc powder
Physical dispersion in resin.
The preparation method of talcum powder enhancing HDPE composite of the present invention further include: recycling raw material is sorted, is cleaned,
Dry, crushing, obtains Recycled HDPE；Preferably, the moisture content of Recycled HDPE is 0.5-3% after control is dry；Preferably, it controls
The granularity of Recycled HDPE is 1-10mm.
The purpose of above-mentioned treatment process is to obtain epigranular and distribution is small, moisture content is low Recycled HDPE.
In the preparation method of talcum powder enhancing HDPE of the present invention, it is granulated using dual-screw pelletizer.For a set pattern
The dual-screw pelletizer of lattice, engine speed are decided by yield, and engine speed is higher, and yield is bigger.Meanwhile revolving speed size also can shadow
Performance after ringing plastic granulating: revolving speed is excessive, and material residence time in screw rod is small, and plasticizing capacity is poor；Revolving speed is too small, host
Material is not fully filled with screw clearance in screw rod, and in main-machine screw, material is very few, and load is less than normal, and material is in screw rod at this time
Good dispersion effect is not achieved in the shearing for showing low-pressure.Under normal circumstances, control engine speed is the 60 of maximum speed
~70% is advisable.
In the present invention, in dual-screw pelletizer, barrel temperature and die head temperature and screw speed are provided that preferably
Ground, dual-screw pelletizer from feed inlet to squeeze out head be 80 DEG C~90 DEG C, 110 DEG C~130 DEG C, 160 DEG C~180 DEG C, 200
DEG C~210 DEG C, 200 DEG C~210 DEG C；Preferably, die head temperature is 190 DEG C~210 DEG C；Preferably, screw speed be 150~
200rpm。
A kind of talcum powder enhancing HDPE composite, is made by above-mentioned preparation method, it is preferable that the talcum powder enhancing
The tensile strength of HDPE composite is 25-30MPa；Elongation at break is 300-500%；Impact strength is that 10-15 is KJ/
m2；Bending strength is 1500-3000MPa.The mechanical performance of the talcum powder enhancing HDPE composite significantly improves, especially
Tensile strength, impact strength and bending strength are greatly enhanced, and modified effect is good, solve Recycled HDPE due to material mechanical
The problem that can decline and cause application range narrow has important research significance and application value in plastic recycling field.
The present invention also provides a kind of applications of talcum powder enhancing HDPE composite, are used to prepare plastic product, described
Plastic product is packaging material, container, pallet, tubing etc.；Preferably, the plastic product is pallet.
The material of most of plastic pallet is all HDPE currently on the market, and material cost is larger, and is used unmodified time
The pallet intensity for receiving HDPE preparation is insufficient, cannot satisfy the use demand.Talcum powder of the present invention enhancing Recycled HDPE is compound
Material is used to prepare pallet, it is preferable that the pallet can pass through any one preparation side in injection molding method, compression molding method
Method is made, and is more preferably made by injection molding method.Thus the intensity and bending property of the pallet prepared significantly increase, and make
With longer life expectancy, cost is also greatly lowered.
Compared with prior art, the invention has the benefit that
The present invention uses the coupling agent in certain concentration range to be surface-treated talcum powder in advance, realizes coupling agent pair
The package of talcum powder, then the modified talc powder of extra fine quality number is modified HDPE, modifying process includes being blended, and is made
Grain, the rigidity and bending property of thus obtained talcum powder enhancing HDPE composite significantly improve, and modified effect is good, solves
Recycled HDPE has latent due to the problem that the mechanical property of materials declines and causes application range narrow in the manufacture field of recycled plastic
Application value and research significance.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment, but ability
Field technique personnel will be understood that following described embodiments are some of the embodiments of the present invention, instead of all the embodiments,
It is merely to illustrate the present invention, and is not construed as limiting the scope of the invention.Based on the embodiments of the present invention, the common skill in this field
Art personnel every other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.The person that is not specified actual conditions in embodiment, carries out according to conventional conditions or manufacturer's recommended conditions.Agents useful for same or instrument
Production firm person is not specified, is the conventional products that can be obtained by commercially available purchase.
In present invention items embodiment, comparative example and reference examples, the standard of every measuring mechanical property is as follows: tensile strength
And elongation at break: GB/T 8804.3-2003；Impact strength: GB/T 1043.1-2008；Bending strength: GB T 9341-
2008。
Embodiment 1
One, the preparation of Recycled HDPE
Raw material are the packaging material of recycling, wherein including the PP, 95% HDPE of 5wt%；By the packaging material of recycling
It is cleaned up after sorting, drying to material moisture content is 1%, then is ground into the resin particle that partial size is not more than 10mm, is returned
Receive HDPE.
Two, the mechanical property of Recycled HDPE
After tested, every mechanical performance data of Recycled HDPE is as shown in Table 1:
Table one
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Recycled HDPE | 21.95 | 601.4 | 8 | 950 |
Embodiment 2
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
A kind of talcum powder enhances HDPE composite, carries out ingredient by the raw material of following parts by weight: 89 parts of embodiments 1
Recycled HDPE, 10 part of 800 mesh platy talc, 1 part of silane coupling agent.Wherein, platy talc is commercially available, and by dealkalize
Reason.Preparation method includes the following steps:
1, the preparation of coupling agent solution: silane coupling agent is dissolved in isopropanol, and stirring evenly obtained concentration is 0.6wt%
Silane coupling agent/aqueous isopropanol；
2, it pre-processes: first platy talc being added in high-speed mixer and is stirred, mixing speed 200rpm, then with mist
Spray form sprays into silane coupling agent/aqueous isopropanol, obtains modified talc powder；
3, it is blended: Recycled HDPE is added in modified talc powder, stir 8min, mixing speed 120rpm, temperature is
23 DEG C, obtain blend composition；
4, it is granulated: blend composition being placed in melting extrusion in parallel dual-screw extruding machine again, obtain modified HDPE, i.e. talcum
Powder enhances HDPE composite；In double screw extruder, dual-screw pelletizer is respectively from feed inlet to the temperature for squeezing out head
80 DEG C, 110 DEG C, 160 DEG C, 200 DEG C, 201 DEG C, die head temperature are 190 DEG C, screw speed 150rpm.
Every mechanical performance data of talcum powder enhancing HDPE composite manufactured in the present embodiment is as shown in Table 2:
Table two
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 1 | 24.91 | 481.2 | 13.8 | 1560 |
Two, a kind of talcum powder enhances HDPE pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk.
Embodiment 3
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
A kind of talcum powder enhancing HDPE composite carries out ingredient: 78.5 parts of embodiments 1 by the raw material of following parts by weight
Recycled HDPE, 20 part of 1250 mesh platy talc, 1.5 parts of silane coupling agents.Wherein, platy talc is commercially available, and is passed through
Dealkalize processing.A kind of preparation method of talcum powder enhancing HDPE composite material the following steps are included:
1, the preparation of coupling agent solution: solid silicone coupling agent is dissolved in dehydrated alcohol, is stirred evenly obtained concentration and is
Silane coupling agent/ethanol solution of 0.5wt%；
2, it pre-processes: first platy talc being added in high-speed mixer and is stirred, mixing speed 220rpm, then with mist
Spray form sprays into silane coupling agent/ethanol solution, obtains modified talc powder；
3, it is blended: the Recycled HDPE of 78.5 parts of embodiments 1 is added in modified talc powder, continue to stir 10min, stirring
Speed is 150rpm, and temperature is 25 DEG C, obtains blend composition；
4, it is granulated: blend composition being placed in melting extrusion in parallel dual-screw extruding machine again, obtain modified HDPE, i.e. talcum
Powder enhances HDPE composite；In double screw extruder, dual-screw pelletizer is respectively from feed inlet to the temperature for squeezing out head
85 DEG C, 120 DEG C, 170 DEG C, 205 DEG C, 205 DEG C, die head temperature are 200 DEG C, screw speed 180rpm.
Every mechanical performance data of talcum powder enhancing HDPE composite manufactured in the present embodiment is as shown in Table 3:
Table three
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 2 | 26.37 | 433.1 | 14.5 | 2150 |
Two, a kind of talcum powder enhances HDPE composite pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Embodiment 4
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
A kind of talcum powder enhancing HDPE composite carries out ingredient: 68 parts of embodiments 1 by the raw material of following parts by weight
Recycled HDPE, 30 part of 1250 mesh platy talc, 2 parts of silane coupling agents, wherein platy talc is commercially available, and by de-
Alkali process.Preparation method includes the following steps:
1, the preparation of coupling agent solution: solid silicone coupling agent is dissolved in deionized water, is stirred evenly obtained concentration and is
The silane coupling agent aqueous solution of 1wt%；
2, it pre-processes: first platy talc being added in high-speed mixer and is stirred, mixing speed 210rpm, then with mist
Shape form sprays into silane coupling agent aqueous solution, so that silane coupling agent is wrapped talcum powder, obtains modified talc powder；
3, it is blended: Recycled HDPE is added in modified talc powder, continue to stir 15min, mixing speed 200rpm, temperature
Degree is 30 DEG C, obtains blend composition；
4, it is granulated: blend composition being placed in melting extrusion in parallel dual-screw extruding machine again, obtain modified HDPE, i.e. talcum
Powder enhances HDPE composite；In double screw extruder, dual-screw pelletizer is respectively from feed inlet to the temperature for squeezing out head
90 DEG C, 130 DEG C, 180 DEG C, 210 DEG C, 210 DEG C, die head temperature are 210 DEG C, screw speed 195rpm.
Every mechanical performance data of talcum powder enhancing HDPE composite manufactured in the present embodiment is as shown in Table 4:
Table four
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 3 | 27.49 | 367.8 | 13 | 2610 |
Two, a kind of talcum powder enhances HDPE pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Embodiment 5
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
A kind of talcum powder enhancing HDPE composite carries out ingredient: 68 parts of embodiments 1 by the raw material of following parts by weight
Recycled HDPE, 30 part of 1250 mesh platy talc, 2 parts of titanate coupling agents.Wherein, platy talc is commercially available, and is passed through
Dealkalize processing.Preparation method includes the following steps:
1, the preparation of coupling agent solution: titanate coupling agent, atoleine being mixed according to 1:1 mass ratio, stirred evenly,
Prepare titanate coupling agent/atoleine solution；
2, it pre-processes: first platy talc being added in high-speed mixer and is stirred, mixing speed 190rpm, then with mist
Form sprays into titanate coupling agent/atoleine solution, and filtering drying obtains modified talc powder；
3, it is blended: Recycled HDPE is added in modified talc powder, continue to stir 15min, mixing speed 200rpm, temperature
Degree is 30 DEG C, obtains blend composition；
4, it is granulated: blend composition being placed in melting extrusion in parallel dual-screw extruding machine again, obtain modified HDPE, i.e. talcum
Powder enhances HDPE composite；In double screw extruder, dual-screw pelletizer is respectively from feed inlet to the temperature for squeezing out head
90 DEG C, 130 DEG C, 180 DEG C, 210 DEG C, 210 DEG C, die head temperature are 210 DEG C, screw speed 195rpm.
Every mechanical performance data of talcum powder enhancing HDPE composite manufactured in the present embodiment is as shown in Table 5:
Table five
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 4 | 27.38 | 400.25 | 14.6 | 2580 |
Two, a kind of talcum powder enhances HDPE pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Embodiment 6
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
Other than 5 parts of POE are added when being granulated as toughener, remaining step and embodiment 4 are all the same.
Every mechanical performance data of talcum powder enhancing HDPE composite manufactured in the present embodiment is as shown in Table 6:
Table six
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 6 | 26.17 | 456.2 | 14.8 | 2350 |
Two, a kind of talcum powder enhances HDPE pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Embodiment 7
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
Other than 5 parts of EVA are added when being granulated as toughener, remaining step and embodiment 4 are all the same.
Every mechanical performance data of talcum powder enhancing HDPE composite manufactured in the present embodiment is as shown in Table 7:
Table seven
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 7 | 26.78 | 461.2 | 14.7 | 2330 |
Two, a kind of talcum powder enhances HDPE pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Comparative example 1
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
A kind of talcum powder enhances HDPE composite, carries out ingredient by the raw material of following parts by weight: 68 parts of embodiments 1
Recycled HDPE, 30 part of 1250 mesh platy talc, 2 parts of silane coupling agents, wherein platy talc is commercially available, and passes through dealkalize
Processing.Preparation method includes the following steps:
1, the preparation of coupling agent solution: solid silicone coupling agent is dissolved in deionized water, is stirred evenly obtained concentration and is
The silane coupling agent aqueous solution of 1wt%；
2, it is blended: Recycled HDPE is added in modified talc powder, continue to stir 15min, mixing speed 200rpm, temperature
Degree is 30 DEG C, obtains blend composition；
3, modified: silane coupling agent aqueous solution being sprayed into blend composition with mist, silane coupling agent package is blended
Talcum powder in material obtains the blend composition by modification；
4, it is granulated: the blend composition Jing Guo modification being placed in melting extrusion in parallel dual-screw extruding machine again, is changed
Property HDPE, i.e., talcum powder enhance HDPE composite；In double screw extruder, dual-screw pelletizer is from feed inlet to extrusion head
Temperature be respectively 90 DEG C, 130 DEG C, 180 DEG C, 210 DEG C, 210 DEG C, die head temperature is 210 DEG C, screw speed 195rpm.
Every mechanical performance data of talcum powder enhancing HDPE composite prepared by comparative example 1 is as shown in Table 8:
Table eight
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Comparative example 1 | 22.6 | 326.8 | 8.5 | 1290 |
Two, a kind of talcum powder enhances HDPE composite pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Comparative example 2
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
Other than the concentration of silane coupler solution is 10wt%, remaining step and embodiment 4 are all the same.
Every mechanical performance data of talcum powder enhancing HDPE composite prepared by comparative example 2 is as shown in Table 9:
Table nine
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 2 | 20.9 | 480.8 | 9 | 1430 |
Two, a kind of talcum powder enhances HDPE composite pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Comparative example 3
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
Other than the concentration of silane coupler solution is 0.01wt%, remaining step and embodiment 4 are all the same.
Every mechanical performance data of talcum powder enhancing HDPE composite prepared by comparative example 3 is as shown in Table 10:
Table ten
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 2 | 22.6 | 450.6 | 8.4 | 1520 |
Two, a kind of talcum powder enhances HDPE composite pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Comparative example 4
One, a kind of talcum powder enhancing HDPE composite and preparation method thereof
In addition to the dosage of silane coupling agent is 0.2 especially that remaining step and embodiment 4 are all the same.
Every mechanical performance data of talcum powder enhancing HDPE composite manufactured in the present embodiment is as shown in table 11:
Table 11
| Mechanical property | Tensile strength/MPa | Elongation at break/% | Impact strength/KJ/m2 | Bending strength/MPa |
| Embodiment 5 | 24.30 | 450.2 | 8.7 | 1530 |
Two, a kind of talcum powder enhances HDPE composite pallet
Using injection molding method, a kind of talcum powder enhancing HDPE support is made in above-mentioned talcum powder enhancing HDPE composite
Disk, wherein the process conditions of injection molding are same as Example 1.
Reference examples 1
A kind of HDPE pallet, is made by the Recycled HDPE of embodiment 1 by injection molding method, wherein the technique of injection molding
Condition is same as Example 1.
It can be obtained according to table one to table 11, with the increase of platy talc mass fraction, the cunning of embodiment 2-7 preparation
Tensile strength, impact strength, the bending strength of mountain flour enhancing HDPE composite significantly increase, the intensity and bendability of material
It can enhance, especially embodiment 3-5, the mass fraction of talcum powder is 20~30 parts, and talcum powder enhances the power of HDPE composite
Have excellent performance, and tensile strength increases 20.1~25.2%, and impact strength increases 62.5~82.5%, and bending strength increases
126.3~174.7%.Due to being added to toughener in embodiment 6,7, the elongation at break of composite material gos up, toughness compared with
Embodiment 1-4 enhancing.
It is good that the modified effect of comparative example 1-4 is not so good as embodiment, after reason may is that comparative example 1 takes and is first blended
Modified mode carry out it is compound, coupling agent cannot complete coated talc powder, therefore modified effect not as good as embodiment it is good；Comparative example 2
Coupling agent concentrations are excessive, and viscosity is big, bad dispersibility, cause coupling agent cannot complete coated talc powder, and then HDPE is to talcum powder
Wetability it is poor, modified effect is general；The coupling agent concentrations of comparative example 3 are too low, and the coupling agent mass fraction of comparative example 4 is few, and two
The coupling agent content of person is all less, former capital cannot fully wrapped around talcum powder, the wetability one of modified talcum powder and HDPE
As, cause modified effect not as good as embodiment.
In conclusion the present invention uses the coupling agent within the scope of a certain concentration to carry out at surface platy talc in advance
Reason realizes that coupling agent is blended to the package of platy talc, then by the modified talc powder of extra fine quality number with HDPE, granulation,
The intensity and bending property of thus obtained talcum powder enhancing HDPE composite significantly improve, and modified effect is good, solves back
HDPE is received due to the problem that the mechanical property of materials declines and causes application range narrow, is had in the recycling field of recycled plastic latent
Application value and research significance.
Claims (10)
1. a kind of preparation method of talcum powder enhancing HDPE composite characterized by comprising
Talcum powder is modified, modified talc powder is obtained；
HDPE is modified using the modified talc powder, obtains modified HDPE；
Wherein, talcum powder is modified including chemical modification, the chemical modification includes being carried out using coupling agent to talcum powder
Modification；
Preferably, the talcum powder is platy talc；
Preferably, the talcum powder is handled by dealkalize；
Preferably, being modified to talcum powder further includes physical modification, and the physical modification includes carrying out machinery to talcum powder to stir
It mixes；
Preferably, talcum powder is modified, comprising: under mechanical agitation, the coupling agent is sprayed into talcum with mist
In powder；
Preferably, controlling the quality proportioning between HDPE, talcum powder and coupling agent is (65~90): (5~30): (0.5~5)；
Preferably, controlling the quality proportioning between HDPE, talcum powder and coupling agent is (67~75): (20~30): (1~3)；
Preferably, the talcum powder is the talcum powder of 800 mesh and/or 1250 mesh.
2. a kind of preparation method of talcum powder enhancing HDPE composite according to claim 1, which is characterized in that described
The preparation method of modified HDPE includes being blended and being granulated；
Preferably, it is granulated after blending；
Preferably, the raw material further includes toughener；
Preferably, toughener is added when being granulated；
Preferably, the quality proportioning for controlling HDPE and toughener is (70~85): (3~5)；
Preferably, the toughener is selected from least one of POE, EVA, SBS and ABS, more preferably POE.
3. a kind of preparation method of talcum powder enhancing HDPE composite according to claim 1, which is characterized in that described
Coupling agent is at least one of silane coupling agent and titanate coupling agent, preferably silane coupling agent；
Preferably, the coupling agent is liquid coupling agent；
Preferably, the coupling agent is solids coupling agent, and the chemical modification includes: that the solids coupling agent is dissolved in solvent,
Obtain coupling agent solution；Chemical modification processing is carried out to the talcum powder through physical modification using the coupling agent solution；
Preferably, the silane coupling agent is for when preparing silane coupler solution, the solvent to be selected from ethyl alcohol, isopropanol and goes
At least one of ionized water；
It is further preferred that the concentration of silane coupler solution is 0.5~1%；
Preferably, the titanate coupling agent is for when preparing titanate coupling agent solution, the solvent to be atoleine；
It is further preferred that the mass ratio of titanate coupling agent, solvent is 1~2:1~2.
4. a kind of preparation method of talcum powder enhancing HDPE composite according to claim 1, which is characterized in that described
HDPE is Recycled HDPE；
Preferably, the tensile strength of the Recycled HDPE is 16-25MPa；Elongation at break is 200-800%；Impact strength is
6-8 is KJ/m2；Bending strength is 800-1200MPa.
5. a kind of preparation method of talcum powder enhancing HDPE composite according to claim 1, which is characterized in that described
During physical modification, controlling the churned mechanically speed is 180~220rpm, and mixing time is 2~5min, whipping temp
It is 20~30 DEG C, preferably 25 DEG C.
6. a kind of preparation method of talcum powder enhancing HDPE composite according to claim 1, which is characterized in that described
Blending includes: that HDPE is added in modified talc powder；
Preferably, described be blended further includes mechanical stirring；
Preferably, control churned mechanically speed be 180~220rpm, mixing time be 8~15min, whipping temp be 20~
30 DEG C, preferably 25 DEG C.
7. a kind of preparation method of talcum powder enhancing HDPE composite according to claim 4, which is characterized in that also wrap
It includes: recycling raw material being sorted, clean, dry, is crushed, Recycled HDPE is obtained；
Preferably, the moisture content for controlling Recycled HDPE is 0.5-3%；
Preferably, the granularity for controlling Recycled HDPE is 1.0mm-10mm.
8. a kind of preparation method of talcum powder enhancing HDPE composite according to claim 2, which is characterized in that use
Dual-screw pelletizer is granulated；
Preferably, dual-screw pelletizer from feed inlet to the temperature for squeezing out head be respectively 80 DEG C~90 DEG C, 110 DEG C~130 DEG C,
160 DEG C~180 DEG C, 200 DEG C~210 DEG C, 200 DEG C~210 DEG C；
Preferably, the die head temperature of dual-screw pelletizer is 190 DEG C~210 DEG C；
Preferably, the screw speed of dual-screw pelletizer is 150~200rpm.
9. a kind of talcum powder enhances HDPE composite, which is characterized in that according to claim -- 8 any preparation methods
It is made；
Preferably, the tensile strength of the talcum powder enhancing HDPE composite is 25-30MPa；Elongation at break is 300-
500%；Impact strength is that 10-15 is KJ/m2；Bending strength is 1500-3000MPa.
10. a kind of talcum powder enhancing HDPE composite as claimed in claim 9 is preparing the application in plastic product；
Preferably, the plastic product is packaging material, container, pallet or tubing；
Preferably, the plastic product is pallet；
Preferably, the pallet can be made by one of injection molding method, compression molding method preparation method, more preferably logical
Injection molding method is crossed to be made.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111037869A (en) * | 2019-06-04 | 2020-04-21 | 安徽富通塑业科技有限公司 | HDPE large-caliber double-wall corrugated pipe online flaring method |
| CN113861566A (en) * | 2021-09-18 | 2021-12-31 | 金发科技股份有限公司 | Polypropylene composition and preparation method thereof |
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| CN102643471A (en) * | 2012-05-14 | 2012-08-22 | 温州天迪塑料实业有限公司 | Method for preparing packaging bag mesh wire after modifying waste HDPE (high-density polyethylene) material |
| CN107163341A (en) * | 2017-06-07 | 2017-09-15 | 天津职业技术师范大学 | A kind of Recycled HDPE activeness and quietness composite containing talcum powder and preparation method thereof |
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| US5532315A (en) * | 1991-12-20 | 1996-07-02 | The Dow Chemical Company | Thermoformable, chemical resistant polymer blends |
| CN102643471A (en) * | 2012-05-14 | 2012-08-22 | 温州天迪塑料实业有限公司 | Method for preparing packaging bag mesh wire after modifying waste HDPE (high-density polyethylene) material |
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| CN111037869A (en) * | 2019-06-04 | 2020-04-21 | 安徽富通塑业科技有限公司 | HDPE large-caliber double-wall corrugated pipe online flaring method |
| CN113861566A (en) * | 2021-09-18 | 2021-12-31 | 金发科技股份有限公司 | Polypropylene composition and preparation method thereof |
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Application publication date: 20190507 |