CN104589748A - Enhanced TPO (thermoplastic polyolefin) automobile instrument skin material and manufacturing method thereof - Google Patents
Enhanced TPO (thermoplastic polyolefin) automobile instrument skin material and manufacturing method thereof Download PDFInfo
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Abstract
The invention provides an enhanced TPO (thermoplastic polyolefin) automobile instrument skin material and a manufacturing method thereof. The enhanced TPO automobile instrument skin material is prepared by a TPO surface layer and an EPP foamed plastic material bonded with the TPO surface layer. The enhanced TPO automobile instrument skin material is characterized in that the TPO surface layer is prepared from the following raw materials in parts by weight: 40-80 parts of ethylene elastomer, 1-30 parts of benzene alkene elastomer, 5-40 parts of polypropylene, 5-20 parts of polyethylene, 0-1 part of cross linking agent, 0-1 part of assistant cross linking agent, 1-10 parts of compatilizer, 0-1 part of light stabilizer, 0-1 part of antioxidant, 5-30 parts of enhancer, 5-20 parts of wearing resisting agent, 5-20 parts of fire retardant, 0.5-2 parts of polyethylene wax lubricant, and 1-3 parts of carbon black pigment. The enhanced TPO automobile instrument skin material has high strength, wearing resistance, scraping resistance, matting property, weather resistance, temperature resistance, environmental protection, no toxicity and recoverability, and is applicable to manufacturing instrument skin materials of cars and various trucks.
Description
Technical field
The invention belongs to technical field of polymer materials, be specifically related to a kind of enhancing, the TPO automotive instrument panel skins of wear-resisting, environmental protection and manufacture method thereof.
Background technology
Instrument board is the important component part of automotive trim, and instrument panel surfaces is instrument board appearance, and the performance quality of epidermis is related to the class of automobile.Driver in driving, guarantee safe while, enjoy and more drive enjoyment.In recent years, along with the continuous progress of technology, more operating function has been integrated in instrument board, except requiring that instrument instrument has except environmental protection, recyclable function, simultaneously for comfortable and aesthetic requirement, the feel of instrument panel surfaces, dermatoglyph, color and luster and tone etc. are also subject to people's attention day by day.China uses PVC/ABS automotive instrument panel skins at present mostly, patent of invention ZL93109207.8, disclose PVC/ABS automotive instrument panel skins material and manufacture method thereof, but PVC/ABS automotive instrument panel skins, there is many defects, as loss of properties on aging, heatproof and smell index are difficult to up to standard, do not meet low-carbon environment-friendly requirement, the aspects such as high-and low-temperature resistance, weatherability, smell, mist degree are all undesirable, produce bioxin after burning, can not meet that people improve day by day to environmental protection and in-car air quality requirement.CN102514337 patent discloses a kind of inner decoration material for automobile and manufacture method thereof, and TPO melt adopts banburying method, and TPO melt is realized by calendering technology by TPO sheet material, and surface dulling and scratch resistance are solved by polyurethane surface conditioning agent.Above patent has the following disadvantages, and one is all adopt incoherent twice banburying rolling process, and sheet material is not easily peeled off from roller, even if add adsorbent and lubricant, situation can be improved.But because TPO material is comparatively responsive to temperature, as long as temperature slightly fluctuates, stripping has some setbacks, and will cause the quality problems such as surface irregularity, uneven thickness; Two is that epidermal surface extinction and surperficial scratch resistance rely on merely the coating of surface conditioning agent effects on surface to realize, but the frequent sanitation and hygiene of driver, after certain number of times or unsuitable cleaning, coat easily comes off, expose the surface of light, cause dazzle, surface is delustring neither, does not also have the scratch resistance on surface simultaneously.CN103965800A patent discloses a kind of environment-friendly type TPO automotive interior material and preparation method thereof, epidermal surface extinction adopts and adds delustering agent solution, surface scratch resistance adopts and adds scratch resistance liniment, TPO top layer is also coated with surface treatment agent layer and the solution of base treating agent layer from top to bottom simultaneously, and surface conditioning agent is water-based or solvent-borne type; Base treating agent is solvent-borne type or water-based.Increase layer of surface process oxidant layer outward again at the base treating agent layer of prior art, prevent after certain number of times or unsuitable cleaning, the coat on surface easily comes off, and exposes the TPO of not scratch-resistant itself, easily occurs the phenomenon of cut.In order to avoid this phenomenon, add surface treatment agent layer, play the effect of duplicate protection.But increase layer of surface process oxidant layer outward again, the coating of two coatings because surface has been coated with base treating agent layer, add epidermal surface light degree undoubtedly, may bring and reduce eliminate optical property impact.Simultaneously before applied in two coats inorganic agent, need first to carry out corona to TPO skin surface, increase surface energy, which increase processing technology, certainly will processing cost be added.
Summary of the invention
For above-mentioned deficiency, the object of the present invention is to provide a kind of enhancing, the TPO automotive instrument panel skins material of wear-resisting, environmental protection and manufacture method thereof, one is adopt extrusion calendaring to replace whole twice banburying method; Two is in employing three roll squeezer, and upper and lower two rollers adopt delustring smooth roll, and middle employing delustring patterned roll, solves the delustring problem of epidermis; Three is in formula, add reinforcing agent and anti-wear agent, improves intensity and the wearability of epidermis, applies coating again without the need to surface; Four are TPO epidermises is environmental protection; Five is TPO top layer backing layer compound EPP foamed plastics; Six are POE, EPDM, SBS, SIS, PP, PE equimolecular structures is all wire chain polymer, ensure that polyolefin elastomer has good resilience, has good heat resistance and chemical resistance by part is crosslinked.
Content of the present invention is as follows: a kind of TPO automotive instrument panel skins material, form by TPO superficial layer with the EPP foamed plastics that TPO superficial layer is pasted together, with parts by weight, it is characterized in that: described TPO superficial layer is made up of following raw material: vinyl elastomer 40-80 part, benzene alkene class elastomer 1-30 part, polypropylene 5-40 part, polyethylene 5-20 part, crosslinking agent 0-1 part, assistant crosslinking agent 0-1 part, compatilizer 1-10 part, light stabilizer 0-1 part, antioxidant 0-1 part, reinforcing agent 5-30 part, anti-wear agent 5-20 part, fire retardant 5-20 part, Tissuemat E lubricant 0.5-2, carbon black pigment 1-3 part,
Described vinyl elastomer is: one or more mixtures in ethylene-octene copolymer (POE), ethylene-propylene copolymer (EPM), ethylene-propylene-diene copolymer (EPDM).
Described styrenic elastomer is the mixture of one or more in styrene-butadiene-styrene ternary block copolymer (SBS), hydrogenated styrene-butadiene-styrene ternary block polymer (SEBS), styrene-isoprene-phenylethene ternary block polymer (SIS).
The melt index of described PP is 0.5-20g/10min; PE is LDPE melt index is 1-10g/10min.
Described 101 crosslinking agents are 2,5-dimethyl (peroxidating-2,5 di-t-butyl) hexane.
Described TIAC assistant crosslinking agent is triallyl cyanurate; Described compatilizer is MPP(PP-g-MAH), polypropylene grafted maleic anhydride); Described light stabilizer is UV531 or UV327; Described antioxidant is four [β-(3,5-di-t-butyl-4 hydroxy phenyl) propionic acid] quaternary amyl alcohol ester (1010) or 2,2
'one or both mixtures in-methylene-bis--(tetramethyl-6-tert-butyl group) octyl propionate (2246); Described reinforcing agent is MCA3200.
Described anti-wear agent is one or both mixtures of hollow glass microbead or poly-four ethene (PTFE) powder: hollow glass microbead is soda lime borosilicate glass, airtight just spherical in hollow, particle diameter is between 15 ~ 135 microns, and apparent density is between 0.12 ~ 0.30g/cm3.
Described fire retardant is halogen-free expanded flame-retardant agent: the mixture of one or more being APP, pentaerythrite, melamine.
Described EPP foamed plastics is expandable polypropylene foamed plastics, and coefficient of foaming is 22-30 times.
Manufacture method of the present invention, comprises the following steps:
1), weigh: according to formula, each component raw material is taken;
2), mix: vinyl elastomer POE or EPDM, benzene alkene class elastomer SBS or SIB that step 1) is weighed, polypropylene PP, polythene PE, crosslinking agent 101, assistant crosslinking agent TIAC, light stabilizer UV531 or UV327, antioxidant 1010 or 2246 etc. are poured in mixer, stir at normal temperatures, mixing time controls to form compound at 15-20 minute;
3), granulation: by step 2) compound, deliver to granulation in double screw extruder hopper with autoloader, extruder temperature controls at 160-200 DEG C, material through extruder discharging die head extruded stock bar, through bosh cooling, pelletizing completes granulation;
4) dry: by the raw material drying machine through granulation at 80 DEG C-100 DEG C dry 2 hours;
5) mix: by above-mentioned dried pellet, (MCA3200, hollow glass microbead, compatilizer (P-g-MAH), lubricant PE wax, fire retardant, pigment etc. are poured in mixer with other material in formula, stir at normal temperatures, mixing time control 15-20 divides formation TPO mixing granulation material;
6) feeding: the TPO mixing granulation material autoloader after step 5) is sent in single screw extrusion machine hopper;
7), extrusion plasticizing: open and really control gas extraction system, by TPO mixing granulation material by single screw extrusion machine, at extruder temperature 170 DEG C-220 DEG C, screw speed 30 revs/min-150 revs/min, carries out plasticizing and extrude;
8), extrude in flakes: according to automotive instrument panel skins specifications and models quality requirement, regulate the gap of crowded die and the roll spacing of width and tri-roll press machine, make TPO plastifying material enter tri-roll press machine from plate squeezing mould;
9), composite molding: described tri-roll press machine is made up of the decorative pattern central roll 3 of the top roll 2 of delustring process, lower roll 4, delustring process, extruder 6, mould 7 and jockey pulley 10, EPP foamed plastics volume (expandable polypropylene foamed plastics section volume) 1 imports from tri-roll press machine by between top roll 2 and central roll 3, the TPO plastifying material 8 being in molten state is bonded together firmly by the froth bed of extruder 6, mould 7 and the EPP foamed plastics 9 between feeding top roll 2 and central roll 3 and forms the skin material 5 of TPO top layer compound EPP foamed plastics;
10), cooling and shaping: from tri-roll press machine skin material out, through cooling and shaping roller cooling and shaping;
11), drawing-off rip cutting: the skin material after sizing, by width specifications requirement, completes rip cutting in drafting process;
12), shear cross cutting: the skin material after rip cutting, enters in plate shearing machine, by length scale requirements, carries out cross cutting;
13), finally carry out stacking, check, pack, put in storage.
The screw diameter that twin-screw granulation in described step 3) is squeezed is Φ 62.4mm, and screw slenderness ratio is 32-52.
The screw diameter of the single screw extrusion machine in described step 6) is Φ 120mm, screw slenderness ratio is 38:1, a self balancing gear type melt pressure pump is installed between single screw extrusion machine end and plate squeezing mould, extrusion die die lip is provided with adjustable bolt, manual adjustments width baffle plate can realize the sheet material producing different-thickness, its die lip width L=1800 mm, goods Breadth Maximum L=1600 mm, adopts the multiple flow passages extrusion die of rack-style;
Tri-roll press machine in described step 7), up-down rollers is delustring smooth roll, and intermediate calender rolls is delustring patterned roll.
The present invention obtains TPO automotive instrument panel skins product, layer thickness 0.7-2.2mm, width 700-1400mm, there is high strength, wearability, scratch resistance, extinction, weatherability, temperature tolerance, environment-protecting asepsis are recyclable, the instrument panel surfaces material making car and various truck can be widely used in.
Accompanying drawing explanation
fig. 1 is tri-roll press machine structural representation of the present invention.
Detailed description of the invention
A kind of TPO automotive instrument panel skins material, form by TPO superficial layer with the EPP foamed plastics that TPO superficial layer is pasted together, with parts by weight, TPO superficial layer is made up of following raw material: vinyl elastomer (POE or EPDM) 40-80 part, benzene alkene class elastomer (SBS or SIS) 1-30 part, polypropylene (PP) 5-40 part, polyethylene (PE) 5-20 part, crosslinking agent (101) 0-1 part, assistant crosslinking agent (TIAC) 0-1 part, compatilizer (pp-g-MAH) 1-10 part, light stabilizer (UV531 or 327) 0-1 part, antioxidant (1010 or 2246) 0-1 part, reinforcing agent (MCA3200) 5-30 part, anti-wear agent 5-20(hollow glass microbead or polytetrafluorethylepowder powder PTFE) part, fire retardant (APP, pentaerythrite, melamine) 5-20 part, Tissuemat E lubricant 0.5-2, carbon black pigment 1-3 part.
Described vinyl elastomer is: one or more mixtures in ethylene-octene copolymer (POE), ethylene-propylene copolymer (EPM), ethylene-propylene-diene copolymer (EPDM).Described styrenic elastomer is the mixture of one or more in styrene-butadiene-styrene ternary block copolymer (SBS), hydrogenated styrene-butadiene-styrene ternary block polymer (SEBS), styrene-isoprene-phenylethene ternary block polymer (SIS).The melt index of described PP is 0.5-20g/10min; PE is LDPE melt index is 1-10g/10min.Described 101 crosslinking agents are 2,5-dimethyl (peroxidating-2,5 di-t-butyl) hexane.Described TIAC assistant crosslinking agent is triallyl cyanurate; Described compatilizer is MPP(PP-g-MAH, polypropylene grafted maleic anhydride); Described light stabilizer is UV531 or UV327; Described antioxidant is four [β-(3,5-di-t-butyl-4 hydroxy phenyl) propionic acid] quaternary amyl alcohol ester (1010) or 2,2
'one or both mixtures in-methylene-bis--(tetramethyl-6-tert-butyl group) octyl propionate (2246); Described reinforcing agent is MCA3200.Described anti-wear agent is one or both mixtures of hollow glass microbead or poly-four ethene (PTFE) powder: hollow glass microbead is soda lime borosilicate glass, airtight just spherical in hollow, particle diameter is between 15 ~ 135 microns, and apparent density is between 0.12 ~ 0.30g/cm3.Described fire retardant is halogen-free expanded flame-retardant agent: one or more mixtures of APP, pentaerythrite, melamine.Described lubricant is PE wax; Described pigment is carbon black.Described EPP foamed plastics is expandable polypropylene foamed plastics, and coefficient of foaming is 22-30 times.
embodiment 1:
a kind of TPO automotive instrument panel skins material, form by TPO superficial layer with the EPP foamed plastics that TPO superficial layer is pasted together, with parts by weight, TPO superficial layer pulp furnish: POE45 part, SBS10 part, PP20 part, PE5.5 part, 101 crosslinking agents 0.15, assistant crosslinking agent TIAC0.14, PP grafted maleic anhydride (PP-g-MAH) 3 parts, UV531 light stabilizer 0.5 part, 1010 0.4 part, antioxidant, MCA3200 reinforcing agent 12 parts, anti-wear agent hollow glass microbead 5 parts, PTFE1 part, ammonium polyphosphate flame retardant 5.6 parts, melamine 2.4 parts, 0.6 part, lubricant PE wax, carbon black pigment 1.5 parts.
Manufacture method step is as follows:
1, technique is weighed: each component raw material accurately taken according to above-mentioned formula;
2, hybrid technique: each component raw material such as vinyl elastomer POE, the SBS of the weighing of weighing, polypropylene PP, polythene PE, 101 crosslinking agents, assistant crosslinking agent TIAC, UV531 light stabilizer, antioxidant 1010 is poured in mixer, stir at normal temperatures, mixing time control 15-20 divides;
3, prilling: the compound that step 2 is mixed, deliver in the double screw extruder hopper of granulation with autoloader, extruder temperature controls at 160-200 DEG C, and material is extruded through extruder, heat, rotating screw bolt, plastify, vacuumize, plastify crosslinked material from discharging die head extruded stock bar, through bosh cooling, then complete granulation work through pelleter;
4, drying process: by the raw material drying machine of step 3 granulation 80 DEG C of-100 DEG C of dryings 2 hours;
5, hybrid technique: by above-mentioned dried pellet, pour in mixer with other material (MCA3200, hollow glass microbead, compatilizer (P-g-MAH), ammonium polyphosphate flame retardant and melamine, lubricant PE wax, pigment etc.) in formula, stir at normal temperatures, mixing time control 15-20 divides;
6, feeding process: (5) compound autoloader is sent in single screw extrusion machine hopper;
7, extrusion plasticizing technique: open and really control gas extraction system, by mixing granulation material by single screw extrusion machine, at extruder temperature 170 DEG C-220 DEG C, screw speed 30 revs/min-150 revs/min, carries out plasticizing and extrudes;
8, be extruded into blade technolgy: according to automotive instrument panel skins specifications and models quality requirement, regulate the gap of crowded die and the roll spacing of width and tri-roll press machine, make plastifying material enter tri-roll press machine from plate squeezing mould;
9, composite molding: described tri-roll press machine is made up of the decorative pattern central roll 3 of the top roll 2 of delustring process, lower roll 4, delustring process, extruder 6, mould 7 and jockey pulley 10, EPP foamed plastics volume (expandable polypropylene foamed plastics section volume) 1 imports from tri-roll press machine by between top roll 2 and central roll 3, the TPO plastifying material 8 being in molten state is bonded together firmly by the froth bed of extruder 6, mould 7 and the EPP foamed plastics 9 between feeding top roll 2 and central roll 3 and forms the skin material 5 of TPO top layer compound EPP foamed plastics;
10, cooling and shaping: from tri-roll press machine skin material out, through cooling and shaping roller cooling and shaping;
11, drawing-off rip cutting: the skin material after sizing, by width specifications requirement, completes rip cutting in drafting process;
12, shear cross cutting: the skin material after rip cutting, enters in plate shearing machine, by length scale requirements, carries out cross cutting;
13, finally carry out stacking, check, pack, put in storage.
TPO top layer backing layer compound EPP froth bed method, when producing TPO top layer, directly imported between tri-roll press machine top roll and intermediate calender rolls by EPP foamed plastics, the TPO material being in molten state will be bonded together firmly with EPP froth bed.(see figure 1)
The outer performance of the TPO epidermis obtained records (see table one) as follows:
Density 1.15g/cm
3, hot strength 16.3MPa, elongation at break 465%, tearing strength 56N/mm, impact strength KJ/m
2: NB, shore hardness 42D.
embodiment 2:
Epidermis top layer pulp furnish: POE60 part; SBS7 part; SIS6 part; PP25 part; PE7.3 part; 101 crosslinking agents 0.21 part; Assistant crosslinking agent TIAC0.20 part; PP grafted maleic anhydride (PP-g-MAH) 3.8 parts; 327 light stabilizers 0.6 part; 2246 0.5 part, antioxidant; MCA3200 reinforcing agent 15 parts; Anti-wear agent hollow glass microbead 7 parts; PTFE1 part; Ammonium polyphosphate flame retardant 7 parts and melamine 3 parts; 0.8 part, lubricant PE wax; Carbon black pigment 1.8 parts.
Manufacture method is with embodiment 1
The outer performance of the TPO epidermis obtained records (see table one) as follows:
Density: 1.15g/cm
3, hot strength: 15.6MPa, elongation at break: 485%, tearing strength 59N/mm, impact strength KJ/m
2: NB, shore hardness: 40D.
embodiment 3:
Epidermis top layer pulp furnish: POE20 part; EPDM50 part; SBS10 part; SIS5 part; PP30 part; PE8.5 part; 101 crosslinking agents 0.25; TIAC assistant crosslinking agent 0.24; PP grafted maleic anhydride (PP-g-MAH) 4.6 parts; UV327 light stabilizer 0.7 part; 1010 0.6 part, antioxidant; MCA3200 reinforcing agent 17.3 parts; Anti-wear agent hollow glass microbead 8.2 parts, PTFE2 part; Ammonium polyphosphate flame retardant 8.1 parts and melamine 3.7 parts; 1.0 parts, lubricant PE wax; Carbon black pigment 2 parts.
Manufacture method is with embodiment 1
The outer performance of the TPO epidermis obtained records (see table one) as follows:
Density: 1.16g/cm
3, hot strength 17.6MPa, elongation at break 510%, tearing strength 63N/mm, impact strength KJ/m
2: NB, shore hardness 38D.
embodiment 4:
Epidermis top layer pulp furnish: POE80 part; SBS18 part; PP35 part; PE9.8 part; 101 crosslinking agents 0.29 part; Assistant crosslinking agent TIAC0.27 part; PP grafted maleic anhydride (PP-g-MAH) 5.4 parts; UV531 light stabilizer 0.9 part; 1010 0.7 part, antioxidant; MCA3200 reinforcing agent 21.7 parts; Anti-wear agent hollow glass microbead 9.2 parts, PTFE2 part; Ammonium polyphosphate flame retardant 9.8 parts and melamine 4.2 parts; 1.1 parts, lubricant PE wax; Carbon black pigment 2.3 parts.
Manufacture method is with embodiment 1
Density 1.17g/cm
3, hot strength 16.5MPa, elongation at break 492%, tearing strength 60.4N/mm, impact strength KJ/m
2: NB, shore hardness 41D.
(table) formula and property relationship
| Sequence number | Material name and performance | 1 | 2 | 3 | 4 |
| 1 | Vinyl elastomer POE | 45 | 60 | 20 | 80 |
| 2 | Vinyl elastomeric EP DM | 50 | |||
| 3 | Benzene alkene class elastomer SBS | 10 | 7 | 10 | 18 |
| 4 | Benzene alkene class elastomer SIS | 6 | 5 | ||
| 5 | Polypropylene PP | 20 | 25 | 30 | 35 |
| 6 | Polythene PE | 5.5 | 7.3 | 8.5 | 9.8 |
| 7 | Crosslinking agent 101 | 0.15 | 0.21 | 0.25 | 0.29 |
| 8 | Assistant crosslinking agent TIAC | 0.14 | 0.20 | 0.24 | 0.27 |
| 9 | Compatibilizer PP-g-MAH | 3 | 3.8 | 4.6 | 5.4 |
| 10 | Light stabilizer UV531 | 0.5 | 0.9 | ||
| 11 | Light stabilizer 327 | 0.6 | 0.7 | ||
| 12 | Antioxidant 1010 | 0.4 | 0.6 | 0.7 | |
| 13 | Antioxidant 2246 | 0.5 | |||
| 14 | Reinforcing agent MCA3200 | 12 | 15 | 17.3 | 21.4 |
| 15 | Anti-wear agent hollow glass microbead | 5 | 7 | 8.2 | 9.2 |
| 16 | Anti-wear agent polytetrafluorethylepowder powder PTFE | 1 | 1 | 2 | 2 |
| 17 | Ammonium polyphosphate flame retardant | 5.6 | 7 | 8.1 | 9.8 |
| 18 | Flame-retardants melamine | 2.4 | 3 | 3.7 | 4.2 |
| 19 | Lubricant PE wax | 0.6 | 0.8 | 1.0 | 1.1 |
| 20 | Pigment carbon black | 1.5 | 1.8 | 2.0 | 2.3 |
| Density g/cm 3 | 1.14 | 1.15 | 1.16 | 1.17 | |
| Hot strength MPa | 16.3 | 15.6 | 17.6 | 16.5 | |
| Elongation at break % | 465 | 485 | 510 | 492 | |
| Tear intensity N/mm | 56 | 59 | 63 | 60.4 | |
| Notch impact strength KJ/m 2 | NB | NB | NB | NB | |
| Shore hardness D | 42 | 40 | 38 | 41 |
The present invention, one is adopt extrusion calendaring to replace whole twice banburying method; Two is in employing three roll squeezer, and upper and lower two rollers adopt delustring smooth roll, and middle employing delustring patterned roll, solves the delustring problem of epidermis; Three is in formula, add reinforcing agent and anti-wear agent, improves intensity and the wearability of epidermis, applies coating again without the need to surface.MCA3200 and hollow glass microbead all have enhancement and wearability, therefore the adding of bi-material, and make epidermis both add intensity and turn increase wearability; Four are TPO epidermises is environmental protection.Unlike PVC/ABS epidermis, after polyvinyl chloride resin burning, decomposite poisonous chlorine, simultaneously in ABS butadiene have two alive easily open under the sun shines decompose aging; Five is TPO top layer backing layer compound EPP foamed plastics methods, not adopt the EPP froth bed back side to scribble polyurethane adhesive, or else be by hot melt pressurizing binding together, but when producing TPO superficial layer, directly imported between tri-roll press machine top roll and intermediate calender rolls by EPP foamed plastics, the TPO material being in molten state will to be bonded together (see figure 1) firmly with EPP froth bed; Six are POE, EPDM, SBS, SIS, PP1, PE equimolecular structures is all wire chain polymer, in order to be conducive to polyolefin elastomer, to be used for instrument panel surfaces material structure comparatively reasonable, above-mentioned wire chain polymer must be transferred to network-like by cross-linking reaction, physical property and the chemical property of instrument panel surfaces material could be improved.That is by crosslinked, POE, EPDM, SBS, SIS, PP1, PE etc. are impelled cross-linking reaction to occur connecing in skill process, but the degree of cross linking can not be too large, general control is between 40-50%, make to reach these rubber and become networking with polyolefin, ensure that polyolefin elastomer has good resilience, and have good heat resistance and chemical resistance, therefore first POE, EPDM, SBS, SIS, PP1, PE etc. are added crosslinking agent and assistant crosslinking agent carries out granulation.
Claims (9)
1. a TPO automotive instrument panel skins material, form by TPO superficial layer with the EPP foamed plastics that TPO superficial layer is pasted together, it is characterized in that: described TPO superficial layer is made up of following raw material: with parts by weight, vinyl elastomer 40-80 part, benzene alkene class elastomer 1-30 part, polypropylene 5-40 part, polyethylene 5-20 part, crosslinking agent 0-1 part, assistant crosslinking agent 0-1 part, compatilizer 1-10 part, light stabilizer 0-1 part, antioxidant 0-1 part, reinforcing agent 5-30 part, anti-wear agent 5-20 part, fire retardant 5-20 part, Tissuemat E lubricant 0.5-2, carbon black pigment: 1-3 part.
2. a kind of TPO automotive instrument panel skins material according to claim 1, is characterized in that: described vinyl elastomer is: one or more mixtures in ethylene-octene copolymer, ethylene-propylene copolymer, ethylene-propylene-diene copolymer.
3. a kind of TPO automotive instrument panel skins material according to claim 1, is characterized in that: described styrenic elastomer is the mixture of one or more in styrene-butadiene-styrene ternary block copolymer, hydrogenated styrene-butadiene-styrene ternary block polymer, styrene-isoprene-phenylethene ternary block polymer.
4. a kind of TPO automotive instrument panel skins material according to claim 1, is characterized in that: described crosslinking agent is 2,5-dimethyl (peroxidating-2,5 di-t-butyl) hexane; Assistant crosslinking agent is triallyl cyanurate; Described compatilizer is PP-g-MAH, polypropylene grafted maleic anhydride; Described light stabilizer is UV531 or UV327; Described antioxidant is four [β-(3,5-di-t-butyl-4 hydroxy phenyl) propionic acid] quaternary amyl alcohol ester or 2,2
'one or both mixtures in-methylene-bis--(tetramethyl-6-tert-butyl group) octyl propionate; Described reinforcing agent is MCA3200.
5. a kind of TPO automotive instrument panel skins material according to claim 1, it is characterized in that: described anti-wear agent is one or both mixtures of hollow glass microbead or poly-four ethylene powder: hollow glass microbead is soda lime borosilicate glass, airtight just spherical in hollow, particle diameter is between 15 ~ 135 microns, and apparent density is between 0.12 ~ 0.30g/cm3; Described fire retardant is halogen-free expanded flame-retardant agent: one or more mixtures of APP, pentaerythrite, melamine.
6. a kind of TPO automotive instrument panel skins material according to claim 1, is characterized in that: described EPP foamed plastics is expandable polypropylene foamed plastics, and coefficient of foaming is 22-30 times.
7. manufacture a method for TPO automotive instrument panel skins material, comprise the following steps:
1), weigh: according to formula, each component raw material is taken; With parts by weight, vinyl elastomer 40-80 part, benzene alkene class elastomer 1-30 part, polypropylene 5-40 part, polyethylene 5-20 part, crosslinking agent 0-1 part, assistant crosslinking agent 0-1 part, compatilizer 1-10 part, light stabilizer 0-1 part, antioxidant 0-1 part, reinforcing agent 5-30 part, anti-wear agent 5-20 part, fire retardant 5-20 part, Tissuemat E lubricant 0.5-2, carbon black pigment 1-3 part
For subsequent use;
2), mix: vinyl elastomer step 1) weighed, benzene alkene class elastomer, polypropylene, polyethylene, crosslinking agent, assistant crosslinking agent, light stabilizer, antioxidant are poured in mixer, stir at normal temperatures, mixing time controls to divide formation compound at 15-20;
3), granulation: by step 2) compound, deliver to granulation in double screw extruder hopper with autoloader, extruder temperature controls at 160-200 DEG C, material through extruder discharging die head extruded stock bar, through bosh cooling, pelletizing completes granulation;
4) dry: by the raw material drying machine through granulation at 80 DEG C-100 DEG C dry 2 hours;
5) mix: by above-mentioned dried pellet, with formula in other material: reinforcing agent, anti-wear agent, compatilizer, Tissuemat E lubricant, fire retardant, carbon black pigment are poured in mixer, stir at normal temperatures, mixing time control 15-20 divides formation TPO mixing granulation material;
6) feeding: the TPO mixing granulation material autoloader after step 5) is sent in single screw extrusion machine hopper;
7), extrusion plasticizing: open and really control gas extraction system, by TPO mixing granulation material by single screw extrusion machine, at extruder temperature 170 DEG C-220 DEG C, screw speed 30 revs/min-150 revs/min, carries out plasticizing and extrude;
8), extrude in flakes: according to automotive instrument panel skins specifications and models quality requirement, regulate the gap of crowded die and the roll spacing of width and tri-roll press machine, make TPO plastifying material enter tri-roll press machine from plate squeezing mould;
9), composite molding: described tri-roll press machine is by the top roll (2) of delustring process, central roll (3), the lower roll (4) of delustring process, extruder (6), mould (7) and jockey pulley (10) composition, EPP foamed plastics volume (1) imports from tri-roll press machine by between top roll (2) and central roll (3), make the TPO plastifying material (8) being in molten state by extruder (6), mould (7) and the froth bed of EPP foamed plastics (9) between feeding top roll (2) and central roll (3) are bonded together the skin material (5) forming TPO top layer compound EPP foamed plastics firmly,
10), cooling and shaping: from tri-roll press machine skin material out, through cooling and shaping roller cooling and shaping;
11), drawing-off rip cutting: the skin material after sizing, by width specifications requirement, completes rip cutting in drafting process;
12), shear cross cutting: the skin material after rip cutting, enters in plate shearing machine, by length scale requirements, carries out cross cutting;
13), finally carry out stacking, check, pack, put in storage.
8. the method for manufacture TPO automotive instrument panel skins material according to claim 7, is characterized in that: the screw diameter that the twin-screw granulation in described step 3) is squeezed is Φ 62.4mm, and screw slenderness ratio is 32-52.
9. the method for manufacture TPO automotive instrument panel skins material according to claim 7, it is characterized in that: the screw diameter of the single screw extrusion machine in described step 6) is Φ 120mm, screw slenderness ratio is 38:1, a self balancing gear type melt pressure pump is installed between single screw extrusion machine end and plate squeezing mould, extrusion die die lip is provided with adjustable bolt, its die lip width L=1800mm, goods Breadth Maximum L=1600mm, adopt the multiple flow passages extrusion die of rack-style, manual adjustments width baffle plate can realize the sheet material producing different-thickness.
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