CN105619837A - Pre-oxidized fiber reinforced thermoplastic composite material product for automobile and preparation method thereof - Google Patents
Pre-oxidized fiber reinforced thermoplastic composite material product for automobile and preparation method thereof Download PDFInfo
- Publication number
- CN105619837A CN105619837A CN201510888127.6A CN201510888127A CN105619837A CN 105619837 A CN105619837 A CN 105619837A CN 201510888127 A CN201510888127 A CN 201510888127A CN 105619837 A CN105619837 A CN 105619837A
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- Prior art keywords
- oxidization fiber
- automobile
- thermoplastic composite
- woven
- hot
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention provides a pre-oxidized fiber reinforced thermoplastic composite material product for an automobile. The product is prepared based on a non-woven process and a hot-pressing process, chopped pre-oxidized fibers are used as a reinforcement body and polypropylene fibers are used as a resin substrate. A specific preparation method comprises the steps that (1) a prefabricated member is prepared based on the non-woven process, particularly, the chopped pre-oxidized fibers and the polypropylene fibers are subjected to the processes of mixing opening, carding web forming, acupuncture reinforcing and cutting and layering according to a certain proportion to obtain the prefabricated member; and (2) a composite material is prepared based on the hot-pressing process, particularly, the prefabricated member is subjected to hot-pressing forming under the action of a certain temperature and pressure. The composite material product is high in designability and has good mechanical properties. In addition, the production environment is friendly, the processes are simple, the operation is easy and the cost is low.
Description
Technical field
The present invention relates to composite material for cars goods, particularly relate to a kind of with chopped oxidization fiber for reinforcement, polypropylene fibre is resin matrix, prepares the oxidization fiber with excellent mechanical property based on nonwovens process and heat pressing process and strengthens thermoplastic composite article and method thereof.
Background technology
Development along with automotive light weight technology, safe, comfortableization and environmental protection, low power consuming trend, plastics and composite thereof are increasingly being applied to auto industry, fibre-reinforced thermoplastic composite is exactly the material wherein applying more, and its application in auto industry is very extensive. And develop one and strengthen thermoplastic composite based on non-woven-heat pressing process automobile oxidization fiber, it is mainly based upon considered below:
Preparing automobile oxidization fiber based on non-woven-heat pressing process and strengthen thermoplastic composite designability by force, good mechanical performance, production environment is friendly. This is start with fiber raw material mainly due to preparation technology, make fiber raw material according to design proportion speed ground Homogeneous phase mixing in composite system through nonwovens process, with common infiltration by reinforcement and resin compounded and compared with opening wide mould pressing process, fortifying fibre and resin matrix content are accurate, do not result in wastage of material.
The fine precursor of polypropylene is in preoxidation process, and linearity molecular structure changes into heat-resisting trapezium structure so that oxidization fiber is molten in flame, persistently keep fibre morphology until carbonization. Oxidization fiber limited oxygen index, up to 40%, belongs to fireproof fibre, and it is resistant to the temperature of more than 300 DEG C. This has just widened the range of choice of oxidization fiber reinforced composite goods manufacturing process and as the potential range of application of auto parts and components, and ensure that the safety that goods use; As the oxidization fiber of carbon fiber precursor, relatively low compared to carbon fiber price, this is greatly lowered the production cost of end article.
It addition, thermoplastic composite has, density is little, intensity is high; Hot property can increase after being typically in the addition of reinforcing material; Linear expansion coefficient is little, reduces the shrinkage factor in product molding process, improves product's dimensional precision; Good resistance to water and dielectric properties; Repeatable machine-shaping, waste product can be recycled, and does not result in the advantages such as environmental pollution.
Summary of the invention
Present invention solves the technical problem that and be to provide one with chopped oxidization fiber for reinforcement, the automobile oxidization fiber that polypropylene fibre is resin matrix strengthens thermoplastic composite. It is simultaneously based on composite prepared by non-woven-heat pressing process because reinforcement and resin matrix are all have stronger designability and excellent mechanical property with fibers form Homogeneous phase mixing.
The present invention is to solve that the technical scheme that the problems referred to above provide is, a kind of oxidization fiber is provided to strengthen thermoplastic composite article, including: with chopped oxidization fiber for reinforcement fiber, polypropylene fibre is resin matrix, utilize nonwovens process by two kinds of fiber Homogeneous phase mixing until prefabricated component molding, then composite fibre prefabricated component is carried out hot-pressing processing, thus preparing the automobile oxidization fiber with excellent mechanical property to strengthen thermoplastic composite.
Chopped oxidization fiber and polypropylene fibre length are 38-65mm, and fibre fineness is 1.67-6.67dtex.
Based on the preparation of nonwovens process prefabricated component, it is embodied as including:
According to certain proportioning, weigh a certain amount of oxidization fiber chopped strand and polypropylene fibre respectively, to composite fibre shredding twice;
Fluffy composite fibre is sprayed certain density antistatic additive equably, encapsulates 8-24 hour;
By composite fibre combing twice on carding machine;
Net tire is sent into needing machine and carries out pinprick reinforcement;
Oxidization fiber/polypropylene fibre precast body through positive and negative acupuncture is cut into the size of regulation, and laying number is 2-20 layer, prepares composite material prefabricated component according to designed laying angle laying.
Composite heat pressing process, is embodied as including:
Use plastic product hydraulic press that composite material prefabricated component is carried out hot-pressing processing, prefabricated component is put into special die, zero-pressure, starts to warm up from room temperature;
It is warming up to 80-100 DEG C, is pressurized to 3-5MPa;
It is warming up to 160-170 DEG C, is pressurized to 8-10MPa;
Heat-insulation pressure keeping 10-60 minute;
It is warming up to hot pressing temperature, is pressurized to hot pressing pressure;
Heat-insulation pressure keeping 20-60 minute;
Naturally cooling to room temperature, the demoulding is taken out.
Technical solution of the present invention is summarized as follows:
With chopped oxidization fiber for reinforcement, with polypropylene fibre for resin matrix, based on nonwovens process, the two is prepared assorted fibre prefabricated component with fibers form Homogeneous phase mixing, being melted by thermoplastic polypropylene fibre then through hot-pressing processing, oxidization fiber is coated with bonding after solidifying and finally prepares the automobile thermoplastic composite of good mechanical performance by melt cooling. Wherein, in composite system, composite materials property is had large effect by the factor such as oxidization fiber percentage by volume, hot pressing temperature and hot pressing pressure.
Beneficial effect:
Reinforcement and resin matrix are all based on nonwovens process Homogeneous phase mixing with fibers form, relative to the common soaking method technique by reinforcement Yu resin compounded, the present invention can so that reinforcement fiber is dispersed in composite system according to volume percent content accurately so that goods have good designability and excellent mechanical property; Relative to flat board open type mould pressing process, the present invention can accomplish that resin raw material is without waste, and production environment is friendly, technique is simple, easily operated, with low cost.
Accompanying drawing explanation
Fig. 1 is based on nonwovens process prefabricated component preparation flow figure;
Fig. 2 is composite heat pressing process flow chart;
Fig. 3 is composite longitudinal cross-section pattern;
Fig. 4 is composite lateral cross section pattern;
Fig. 5 is the impact that oxidization fiber volume fraction is powerful on composite buckling;
Fig. 6 is the impact that oxidization fiber volume fraction is powerful on composite transverse curvature;
Detailed description of the invention
Below by specific embodiment, and in conjunction with accompanying drawing, the present invention is expanded on further. Unless stated otherwise, in embodiment, techniques not described means all can realize by mode known in those skilled in the art. It addition, embodiment is interpreted as illustrative, and unrestricted the scope of the present invention, the spirit and scope of the invention are limited only by the claims that follow. To those skilled in the art; under the premise without departing substantially from spirit and scope of the present invention; various amendments that material component in these embodiments, consumption, size, shape are carried out, replacement, improvement fall within protection scope of the present invention, and the design parameter that the present invention limits should have admissible range of error.
Embodiment 1: automobile oxidization fiber strengthens the preparation of Thermoplastic Laminates
Weigh a certain amount of oxidization fiber chopped strand and polypropylene fibre respectively so that oxidization fiber volume fraction is 40%, mixing shredding twice;
Fluffy composite fibre is sprayed antistatic additive equably, encapsulates 8 hours;
By composite fibre combing twice on carding machine;
Net tire is sent into needing machine and carries out pinprick reinforcement;
Oxidization fiber/polypropylene fibre precast body through positive and negative acupuncture is cut into suitably sized size, and laying number is 12 layers, ensures that each layer fiber architecture direction is consistent during laying.
Composite heat pressing process, is embodied as including:
Use plastic product hydraulic press that composite material prefabricated component is carried out hot-pressing processing, prefabricated component is put into special die, zero-pressure, starts to warm up from room temperature;
It is warming up to 80 DEG C, is pressurized to 3MPa;
It is warming up to 160 DEG C, is pressurized to 10MPa;
Heat-insulation pressure keeping 30 minutes;
It is warming up to 190 DEG C, is pressurized to 20MPa;
Heat-insulation pressure keeping 20 minutes;
Naturally cooling to room temperature, the demoulding is taken out.
The composite board (preparation flow figure is as depicted in figs. 1 and 2) prepared in the present embodiment, prepare owing to composite material prefabricated component is based on nonwovens process, so fortifying fibre is mixed homogeneously with resin matrix, the potentiation of fortifying fibre can be given full play to, increase substantially the mechanical property of end article. Simultaneously because laying direction unanimously and all ensure that most of fortifying fibre is along genesis analysis (as shown in Figure 3 and Figure 4) so that composite vertical mixing coefficient is better than horizontal mechanical performance.
Embodiment 2: the oxidization fiber volume fraction impact on composite board vertically and horizontally bending property
Weigh a certain amount of oxidization fiber chopped strand and polypropylene fibre respectively so that oxidization fiber volume fraction respectively 30%, 40%, 50%, 60%, mixing shredding twice;
Fluffy composite fibre is sprayed antistatic additive equably, encapsulates 16 hours;
By composite fibre combing twice on carding machine;
Net tire is sent into needing machine and carries out pinprick reinforcement;
Oxidization fiber/polypropylene fibre precast body through positive and negative acupuncture is cut into suitably sized size, and laying number is 8 layers, ensures that each layer fiber architecture direction is consistent during laying.
Composite heat pressing process, is embodied as including:
Use plastic product hydraulic press that composite material prefabricated component is carried out hot-pressing processing, prefabricated component is put into special die, zero-pressure, starts to warm up from room temperature;
It is warming up to 90 DEG C, is pressurized to 4MPa;
It is warming up to 160 DEG C, is pressurized to 8MPa;
Heat-insulation pressure keeping 40 minutes;
It is warming up to 180 DEG C, is pressurized to 20MPa;
Heat-insulation pressure keeping 50 minutes;
Naturally cooling to room temperature, the demoulding is taken out.
Increasing the volume fraction of fortifying fibre in the present embodiment, composite board vertically and horizontally bending property is had appreciable impact, effect tendency is as shown in Figure 5 and Figure 6. Wherein, maximum vertically and horizontally bending strength respectively reaches 79.90MPa, 78.10MPa.
Claims (6)
1. the automobile oxidization fiber based on non-woven-heat pressing process strengthens a thermoplastic composite article, including: with chopped oxidization fiber for reinforcement, polypropylene fibre is resin matrix. Prepare assorted fibre prefabricated component based on nonwovens process, finally prepare oxidization fiber then through hot-pressing processing and strengthen thermoplastic composite.
2. a kind of automobile oxidization fiber based on non-woven-heat pressing process strengthens thermoplastic composite article as claimed in claim 1, it is characterised in that chopped oxidization fiber and polypropylene fibre length are 38-65mm, and fibre fineness is 1.67-6.67dtex.
3. a kind of automobile oxidization fiber based on non-woven-heat pressing process strengthens thermoplastic composite article as claimed in claim 2, it is characterised in that chopped oxidization fiber volume fraction is 10%-80%, to oxidization fiber/polypropylene fibre mixing shredding twice.
4. a kind of automobile oxidization fiber based on non-woven-heat pressing process strengthens thermoplastic composite article as claimed in claim 3, it is characterised in that by composite fibre combing twice on carding machine.
5. a kind of automobile oxidization fiber based on non-woven-heat pressing process strengthens thermoplastic composite article as claimed in claim 4, it is characterized in that being cut into the oxidization fiber/polypropylene fibre precast body through positive and negative acupuncture the size of regulation, laying number is 2-20 layer, prepares composite material prefabricated component according to designed laying angle laying.
6. a kind of automobile oxidization fiber based on non-woven-heat pressing process strengthens thermoplastic composite article as claimed in claim 5, it is characterised in that using special die that prefabricated component is carried out hot-pressing processing, concrete steps include:
A. use plastic product hydraulic press that composite material prefabricated component is carried out hot-pressing processing, prefabricated component is put into special die, zero-pressure, starts to warm up from room temperature;
B. it is warming up to 80-100 DEG C, is pressurized to 3-5MPa;
C. it is warming up to 160-170 DEG C, is pressurized to 8-10MPa;
D. heat-insulation pressure keeping 10-60 minute;
E. it is warming up to hot pressing temperature, is pressurized to hot pressing pressure;
F. heat-insulation pressure keeping 20-60 minute;
G. naturally cooling to room temperature, the demoulding is taken out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510888127.6A CN105619837A (en) | 2015-12-04 | 2015-12-04 | Pre-oxidized fiber reinforced thermoplastic composite material product for automobile and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510888127.6A CN105619837A (en) | 2015-12-04 | 2015-12-04 | Pre-oxidized fiber reinforced thermoplastic composite material product for automobile and preparation method thereof |
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| CN105619837A true CN105619837A (en) | 2016-06-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510888127.6A Pending CN105619837A (en) | 2015-12-04 | 2015-12-04 | Pre-oxidized fiber reinforced thermoplastic composite material product for automobile and preparation method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149385A (en) * | 2018-02-12 | 2018-06-12 | 张毅 | A kind of preparation method of natural fiber enhancing composite material |
| CN110053275A (en) * | 2019-04-26 | 2019-07-26 | 广东航科新材料有限公司 | A kind of preparation method and process equipment of carbon fibre composite |
| CN113878796A (en) * | 2021-09-29 | 2022-01-04 | 湖北三江航天红阳机电有限公司 | Irregular thin-wall multi-face heat-proof cover and manufacturing method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619022A (en) * | 2012-04-24 | 2012-08-01 | 南通大学 | Composite interior material for motor car and preparation method thereof |
| CN102797110A (en) * | 2012-08-16 | 2012-11-28 | 绍兴文理学院 | Preparation method for thermal compression jute reinforced composite |
-
2015
- 2015-12-04 CN CN201510888127.6A patent/CN105619837A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102619022A (en) * | 2012-04-24 | 2012-08-01 | 南通大学 | Composite interior material for motor car and preparation method thereof |
| CN102797110A (en) * | 2012-08-16 | 2012-11-28 | 绍兴文理学院 | Preparation method for thermal compression jute reinforced composite |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108149385A (en) * | 2018-02-12 | 2018-06-12 | 张毅 | A kind of preparation method of natural fiber enhancing composite material |
| CN108149385B (en) * | 2018-02-12 | 2019-08-27 | 张毅 | A kind of preparation method of natural fiber enhancing composite material |
| CN110053275A (en) * | 2019-04-26 | 2019-07-26 | 广东航科新材料有限公司 | A kind of preparation method and process equipment of carbon fibre composite |
| CN113878796A (en) * | 2021-09-29 | 2022-01-04 | 湖北三江航天红阳机电有限公司 | Irregular thin-wall multi-face heat-proof cover and manufacturing method thereof |
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Application publication date: 20160601 |