CN103374220B - Natural fiber enhancing polyurethane elastic composite and preparation method thereof - Google Patents
Natural fiber enhancing polyurethane elastic composite and preparation method thereof Download PDFInfo
- Publication number
- CN103374220B CN103374220B CN201210120944.3A CN201210120944A CN103374220B CN 103374220 B CN103374220 B CN 103374220B CN 201210120944 A CN201210120944 A CN 201210120944A CN 103374220 B CN103374220 B CN 103374220B
- Authority
- CN
- China
- Prior art keywords
- natural fiber
- mould
- component
- polyurethane elastomer
- felt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a kind of natural fiber enhancing polyurethane elastic composite, it is made up of the component including following weight portion：30 70 parts of natural fiber, 70 30 parts of polyurethane elastomer, wherein described natural fiber is selected from jute, sisal hemp, hemp, flax, ramie, and the polyurethane elastomer is selected from the polyurethane elastomer of the polyurethane elastomer, soft polyurethane elastomer or semi-rigid of hard.The invention also discloses the preparation method that above-mentioned natural fiber strengthens polyurethane elastic composite.It is raw material that the present invention uses degradable natural fiber, beneficial to environmental protection, and impregnate natural fiber felt after mixing liquid polyurethane A, B component raw material using reaction injection technique, then curing molding, overcome the product surface out-of-flatness problem that traditional glass fibre causes with polyurethane elastomer casting process, the composite-material abrasive prepared is good, and impact strength is improved, and can be used to substitute existing glass fibre reinforced composion for automotive upholstery.
Description
Technical field
The present invention relates to technical field of polymer materials, more particularly to a kind of natural fiber enhancing polyurethane elastomer（UE）
Composite and preparation method thereof, be suitable for automotive trim in terms of degradable composite material.
Background technology
Current automotive trim plate is mainly the composite of fiber-reinforced thermoplastic resin, and fiber used is mostly
Glass fibre, the composite low cost of glass fiber reinforcement, intensity is high, but the composite impact of glass fiber reinforcement
Can be poor, but also glass fibre brings the system that product surface causes into there is glass fibre and polyurethane elastomer casting process
Product surface irregularity problem, while glass fibre is not allowed degradable, is unfavorable for environmental protection.Due to now social for automobile industry side
The requirement more and more higher in face, and also have clear and definite wanting to indices such as automobile environment-protection type, lightweight, drop oil consumption, cost declinings
Ask, some automotive trims are made the transition to the enhanced composite of natural fiber, and the enhanced composite of natural fiber will be gathered around
There is broader market.
The yield of whole world natural fiber is very big, and is being continuously increased, and is the important materials source of textile industry, is also
One important directions of composite future development.But the composite that the enhanced ordinary thermoplastics of natural fiber obtain
Intensity is relatively low, and for automotive field, many aspect performances do not reach requirement.
Polyurethane elastomer possesses more excellent performances than thermoplastic, and such as tensile strength is high, wear-resisting, impact resistance
Can be good, load support capacity is big, good damping effect, and these all cause that it plays huge work in some special application fields
With, the compound deficiency that can be made up on natural fiber strength of itself and natural fiber, the natural fiber of high strength and modulus-poly- is prepared
Urethane elastic composite, is also a larger breakthrough for automobile industry.
The content of the invention
In order to solve the problems, such as above-mentioned prior art, the first object of the present invention is to provide a kind of natural fiber to increase
Strong polyurethane elastomer（UE）Composite, to solve natural fiber enhancing answering of obtaining of ordinary thermoplastics in the prior art
Condensation material intensity is relatively low, and performance does not reach the problem of requirement.
The second object of the present invention is to provide above-mentioned natural fiber enhancing polyurethane elastomer（UE）The system of composite
Preparation Method, brings product surface into solving traditional glass fibre and causes with glass fibre in polyurethane elastomer casting process
Product surface out-of-flatness and the relatively low problem of the product strength that obtains.
The purpose of the present invention is achieved through the following technical solutions：
A kind of natural fiber strengthens polyurethane elastic composite, is made up of the component including following weight portion：
Natural fiber 30-70 parts,
Polyurethane elastomer 70-30 parts.
It is preferred that the parts by weight of the natural fiber are preferred 50-70 parts；The parts by weight of the polyurethane elastomer are excellent
Select 30-50 parts.
It is preferred that the natural fiber is selected from one or more in jute, sisal hemp, hemp, flax, ramie.
It is preferred that the polyurethane elastomer is selected from the polyurethane elastomer of hard, soft polyurethane elastomer or half
The polyurethane elastomer of hard.
It is preferred that the polyurethane elastomer of the polyurethane elastomer of the preferred semi-rigid of polyurethane elastomer or hard
It is a kind of.
It is preferred that the polyurethane elastomer is 100-108 by weight ratio：Component A and the B component synthesis of 100-101, its
In
The component A is polyether mixture, mainly compares 100 including weight:0.1-1:The polyalcohol of 5-10, catalyst and add
Plus agent；
The B component is isocyanates mixture.
It is preferred that in the component A：
The polyalcohol is selected from polyoxypropyleneglycol, polytetrahydrofuran diol, Polyoxyethylene glycol, polybutadiene two
One or more of alcohol；
The catalyst be selected from dibutyl tin laurate, stannous octoate, triethanolamine, one kind of diethylenetriamine or
It is several；
The additive is selected from BDO, 3,3 '-two chloro- 4,4 '-diaminourea-diphenyl methane, trihydroxy methyl third
One or more of alkane.
It is preferred that the B component be selected from 4 ˊ of the ﹐ of diphenyl methane-4-diisocyanate TDI, toluene di-isocyanate(TDI) MDI,
One or more of liquefaction toluene di-isocyanate(TDI) MDI.
A kind of above-mentioned natural fiber strengthens the preparation method of polyurethane elastic composite, comprises the following steps：
（1）Pretreatment：
The mould of automotive trim plate shape that will want to be made is preheating to 20 DEG C -60 DEG C；
Selection thickness is the continuous natural fiber felt of 0.1-10mm, and natural fiber felt is cut into mold shape size
Fibrofelt, is then fed into warmed-up mould；
Component A and B component are respectively put into head tank and its temperature is kept at 25 DEG C -40 DEG C, measured afterwards
Mass ratio is 100-108:The component A and B component of 100-101 make it into mixing head and are uniformly mixed, and form A, B component
Mixture；
（2）Mold filling：
When injection starts, the valve of mixing head is opened, and A, B component mixture flow into mould at pressures close to atmospheric pressure
Dipping natural fiber felt, the A of 30-70 weight portions, B component mixture are added to 1-20 layers of natural fiber of 70-30 weight portions
In felt, A, B component mixture are added according to identical mass ratio on each of which layer natural fiber felt, closed after mould is full of
Valve closing door, matched moulds；
（3）Solidification：Mould is placed in solidification 10-30min is reacted under 1-5MPa pressure, solidification temperature is 60 DEG C -100 DEG C,
Product is removed from the molds after cooling shaping, that is, obtains natural fiber enhancing polyurethane elastic composite.
It is preferred that the step（1）The preheating temperature of middle mould is 40 DEG C -60 DEG C；The thickness of natural fiber felt is preferred
0.2-5mm；
The step（2）In, the A, B component mixture are 30-50 weight portions, and the natural fiber felt is 70-50 weights
Amount part；
The step（3）In, the preferred 1-2MPa of solidifying pressure, preferably 80 DEG C -90 DEG C of solidification temperature.
Compared with prior art, the invention has the advantages that：
Dipping is natural fine after the first, present invention is mixed the polyurethane A of liquid, B component raw material using reaction injection technique
Dimension felt, curing molding is obtained natural fiber under certain conditions strengthens polyurethane elastic composite, this reaction injection work
Skill overcomes traditional glass fibre and brings the system that product surface causes into glass fibre in polyurethane elastomer casting process
Product surface irregularity problem, gained composite material surface is smooth, good hand touch；
Composite-material abrasive prepared by the 2nd, present invention is good, and impact strength is improved, its wearability, impact strength
And tensile strength is more preferable than the composite of natural fiber reinforced thermoplastics, can be used to substitute existing glass fiber reinforcement
Composite is used for automotive upholstery such as door inner panel, car roof etc.；
The 3rd, present invention uses degradable natural fiber, beneficial to environmental protection, is capable of achieving automotive upholstery lighting, high-strength
Change, the new automobile theory of environmental protection, reach the green harmony of material and life.
Specific embodiment
The present invention is described in detail with reference to each embodiment.
Embodiment 1
The mould of automotive trim plate shape that will want to be made is preheating to 40 DEG C, and mould preheating in advance helps to reduce reacts
The viscosity of thing A, B component mixture so that the mixture viscosity reduction of the polyurethane reaction thing A, B component of entrance, good fluidity,
Natural fiber felt is good with the dipping effect of mixture；Selection thickness is the continuous jute natural fiber felts of 0.5 mm, will be natural
Fibrofelt is sent to mould top and cuts into the fibrofelt of mold shape size by a continuous conveyer belt, is then fed into
To in warmed-up mould；Raw material component A and B component are reacted by two kinds（Wherein component A compares 100 for weight:0.1:5 it is poly-
Ethylene oxide glycol 1000（Shanghai Hao Yi Chemical Industry Science Co., Ltd）, dibutyl tin laurate（Model 101）, 1,4- fourths two
Alcohol（Traditional Chinese medicines）；B component is 4 ˊ of the ﹐ of diphenyl methane-4-diisocyanate TDI；A, the composition weight proportion of B component raw material are 100：
100）It is respectively put into the head tank with agitator temperature controllable, the temperature adjustment of component A and B component is kept at 40
DEG C and 25 DEG C, by the accurate measurement of measuring pump, component A and B component is into mixing head and is uniformly mixed forms A, B group
Divide mixture；When injection starts, the valve of mixing head is opened, the fierce collision at a high speed of A, B component mixture, close to atmospheric pressure
Mould dipping natural fiber felt is flowed under pressure, the A of 35 weight portions, B component mixture are added to 65 weights in the present embodiment
Measure in 7 layers of natural fiber felt of part, A, B component mixture added according to above-mentioned part by weight on each layer of natural fiber felt,
Valve, matched moulds are closed after mould is full of；Mould is placed in reaction solidification 25min under the pressure of 1MPa, solidification temperature is 85 DEG C,
Product is removed from the molds after cooling shaping.The mass fraction of natural fiber felt is 65%, corresponding two in the composite for obtaining
Plant reaction raw material（Hard polyaminoester elastomeric component raw material）The percentage that A, B component account for gross mass is 35%, composite
Tensile strength is 29MPa, and impact strength is 33kj/m2, and the general tensile strength of common automotive trim panel is 25MPa or so,
Impact strength is in 30kj/m2, Comparatively speaking, tensile strength improves 16%, and impact strength improves 10%.
Embodiment 2
Selection thickness is the continuous sisal hemp natural fiber felts of 0.6 mm；The mould of automotive trim plate shape being made will be wanted
45 DEG C are preheating to, mould preheating in advance helps to reduce reactant A, the viscosity of the mixture of B component so that the thermoplasticity of entrance
The mixture viscosity reduction of polyurethane reaction thing A, B component, good fluidity, natural fiber felt is good with the dipping effect of mixture
It is good；Natural fiber felt is sent to mould top by a continuous conveyer belt, cuts into the fibrofelt of mold shape size, so
It is sent to afterwards in warmed-up mould；Raw material component A and B component are reacted by two kinds（Wherein component A compares 100 for weight:0.2:
6 polytetrahydrofuran diol 1000（PTMEG1000, Shanghai Hao Yi Chemical Industry Science Co., Ltd）, it is stannous octoate, 3,3 '-two chloro-
4,4 '-diaminourea-diphenyl methane；B component is 4 ˊ of the ﹐ of diphenyl methane-4-diisocyanate TDI；The composition of A, B component raw material
Match is 100：101）It is respectively put into the head tank with agitator temperature controllable, the temperature adjustment point of component A and B component
Be not maintained at 30 DEG C, by the accurate measurement of measuring pump, component A and B component is into mixing head and is uniformly mixed, formed A,
B component mixture；When injection starts, the valve of mixing head is opened, the fierce collision at a high speed of A, B component mixture, close to air
Mould dipping natural fiber felt is flowed under the pressure of pressure, in the present embodiment the A of 40 weight portions, B component mixture is added to
In 6 layers of natural fiber felt of 60 weight portions, A, B component is added to mix according to this mass ratio on each layer of natural fiber felt
Material, closes valve, matched moulds after mould is full of；Mould is placed in reaction solidification 30min under the pressure of 1.5MPa, reaction temperature is
85 DEG C, product is removed from the molds after cooling shaping.The mass fraction of natural fiber felt is 60%, phase in the composite for obtaining
The two kinds of reaction raw material answered（Hard polyaminoester elastomeric component raw material）The percentage that A, B component account for gross mass is 40%, is combined
The tensile strength of material is 32MPa, and impact strength is 36kj/m2, and the general tensile strength of common automotive trim panel is 25MPa
Left and right, impact strength is in 30kj/m2, Comparatively speaking, tensile strength improves 28%, and impact strength improves 20%.
Embodiment 3
The mould of automotive trim plate shape that will want to be made is preheating to 50 DEG C, and mould preheating in advance helps to reduce reacts
The viscosity of thing A, the mixture of B component so that the mixture viscosity reduction of the thermoplastic polyurethane reactant A, B component of entrance,
Good fluidity, natural fiber felt is good with the dipping effect of mixture；Selection thickness is the continuous hemp natural fibers of 0.8 mm
Felt, mould top is sent to by natural fiber felt by a continuous conveyer belt, cuts into the fibrofelt of mold shape size,
It is then fed into warmed-up mould；Raw material component A and B component are reacted by two kinds（Wherein component A compares 100 for weight:
0.1:6 polyoxypropyleneglycol（PPG1000, the triumphant Chemical Co., Ltd. of Bitsoft in Shanghai）, triethanolamine, trimethylolpropane；B
Component is 4 ˊ of the ﹐ of diphenyl methane-4-diisocyanate TDI；A, the composition and ratio of B component raw material are 108：100）It is respectively put into band
Have in the head tank of agitator temperature controllable, the temperature adjustment of component A and B component is kept at 35 DEG C, by measuring pump
Accurate measurement, component A and B component is into mixing head and is uniformly mixed forms A, B component mixture；When injection starts,
The valve of mixing head is opened, the fierce collision at a high speed of A, B component mixture, and mould dipping day is flowed at pressures close to atmospheric pressure
, be added to 35 parts of A, B material mixture in 65 parts of 5 layers of natural fiber felt in the present embodiment, each layer of day by right fibrofelt
A, B component mixture are added according to this mass ratio on right fibrofelt, valve, matched moulds, by mould are closed after mould is full of
Tool reacts solidification 25min under being placed in the pressure of 1MPa, and solidification temperature is 90 DEG C, and product is removed from the molds after cooling shaping.
To composite in natural fiber felt mass fraction be 65%, it is corresponding two kinds reaction raw material（Semi-hard polyurethane elasticity
Body component raw material）The percentage that A, B component account for gross mass is 35%, and the tensile strength of composite is 28MPa, and impact strength is
36kj/m2, and the general tensile strength of common automotive trim panel is 25MPa or so, impact strength is in 30kj/m2, Comparatively speaking,
Tensile strength improves 24%, and impact strength improves 20%.
Embodiment 4
The mould of automotive trim plate shape that will want to be made is preheating to 60 DEG C, and mould preheating in advance helps to reduce reacts
The viscosity of thing A, the mixture of B component so that the mixture viscosity reduction of the thermoplastic polyurethane reactant A, B component of entrance,
Good fluidity, natural fiber felt is good with the dipping effect of mixture；Selection thickness is the continuous flax natural fibers of 1.0 mm
Felt, mould top is sent to by natural fiber felt by a continuous conveyer belt, cuts into the fibrofelt of mold shape size,
It is then fed into warmed-up mould；Raw material component A and B component are reacted by two kinds（Wherein component A compares 100 for weight:
0.5:6 polybutadiene diol 2000（The triumphant Chemical Co., Ltd. of Bitsoft in Shanghai）, diethylenetriamine, trimethylolpropane；B groups
It is divided into toluene di-isocyanate(TDI) MDI；A, the composition and ratio of B component raw material are 108：100）It is respectively put into controllable with agitator
In the head tank of temperature, the temperature adjustment of component A and B component is kept at 40 DEG C, by the accurate measurement of measuring pump, A groups
Divide and B component is into mixing head and is uniformly mixed, form A, B component mixture；When injection starts, the valve of mixing head is beaten
Open, the fierce collision at a high speed of A, B component mixture flows into mould dipping natural fiber felt, at this at pressures close to atmospheric pressure
45 parts of A, B material mixture is added in 55 parts of 3 layers of natural fiber felt in embodiment, is pressed on each layer of natural fiber felt
A, B component mixture are added according to this mass ratio, valve is closed after mould is full of, mould is placed in matched moulds the pressure of 2MPa
Solidification 30min is reacted under power, solidification temperature is 85 DEG C, and product is removed from the molds after cooling shaping.In the composite for obtaining
The mass fraction of natural fiber felt is 55%, corresponding two kinds of reactions raw material（Semi-hard polyurethane elastomeric component raw material）A、B
The percentage that component accounts for gross mass is 45%.The tensile strength of composite is 38MPa, and impact strength is 40kj/m2, and it is common
The general tensile strength of automotive trim panel for 25MPa or so, impact strength is in 30kj/m2, Comparatively speaking, tensile strength improves
52%, impact strength improves 33%.
Embodiment 5
The mould of automotive trim plate shape that will want to be made is preheating to 40 DEG C, and mould preheating in advance helps to reduce reacts
The viscosity of thing A, the mixture of B component so that the mixture viscosity reduction of the thermoplastic polyurethane reactant A, B component of entrance,
Good fluidity, natural fiber felt is good with the dipping effect of mixture；Selection thickness is the continuous ramie natural fibers of 5.0 mm
Felt, mould top is sent to by natural fiber felt by a continuous conveyer belt, cuts into the fibrofelt of mold shape size,
It is then fed into warmed-up mould；Raw material component A and B component are reacted by two kinds（Wherein component A compares 100 for weight:
0.1:5 polyoxypropyleneglycol（PPG2000, the triumphant Chemical Co., Ltd. of Bitsoft in Shanghai）, diethylenetriamine, trihydroxy methyl third
Alkane；B component is liquefaction toluene di-isocyanate(TDI) MDI；A, the composition and ratio of B component raw material are 108：100）It is respectively put into carry and stirs
Mix in the head tank of device temperature controllable, the temperature adjustment of component A and B component is kept at 35 DEG C, by the essence of measuring pump
Really metering, component A and B component is into mixing head and is uniformly mixed forms A, B component mixture；When injection starts, mixing
The valve of head is opened, the fierce collision at a high speed of A, B component mixture, mould dipping is flowed at pressures close to atmospheric pressure natural fine
, be added to 50 parts of A, B material mixture in 50 parts of 1 layer of natural fiber felt in the present embodiment by dimension felt, and each layer is naturally fine
A, B component mixture are added according to this mass ratio on dimension felt, valve is closed after mould is full of, matched moulds puts mould
In solidification 30min is reacted under the pressure of 1MPa, solidification temperature is 80 DEG C, and product is removed from the molds after cooling shaping.Obtain
The mass fraction of natural fiber felt is 50% in composite, corresponding two kinds of reactions raw material（Semi-hard polyurethane elastomer group
Divide raw material）The percentage that A, B component account for gross mass is 50%, and the tensile strength of composite is 40MPa, and impact strength is 46kj/
m2, and the general tensile strength of common automotive trim panel is 25MPa or so, impact strength is in 30kj/m2, Comparatively speaking, stretching is strong
Degree improves 60%, and impact strength improves 53%.
Embodiment 6
The mould of automotive trim plate shape that will want to be made is preheating to 40 DEG C, and mould preheating in advance helps to reduce reacts
The viscosity of thing A, the mixture of B component so that the mixture viscosity reduction of the thermoplastic polyurethane reactant A, B component of entrance,
Good fluidity, natural fiber felt is good with the dipping effect of mixture；Selection thickness is the continuous jute natural fibers of 0.2 mm
Felt, mould top is sent to by natural fiber felt by a continuous conveyer belt, cuts into the fibrofelt of mold shape size,
It is then fed into warmed-up mould；Raw material component A and B component are reacted by two kinds（Wherein component A compares 100 for weight:1:
10 polyoxypropyleneglycol（PPG2000, the triumphant Chemical Co., Ltd. of Bitsoft in Shanghai）, catalyst diethylenetriamine, additive
Trimethylolpropane and 1,4- butanediols；B component is toluene di-isocyanate(TDI) MDI；A, the composition and ratio of B component raw material are 108：
100）It is respectively put into the head tank with agitator temperature controllable, the temperature adjustment of component A and B component is kept at 25
DEG C, by the accurate measurement of measuring pump, component A and B component is into mixing head and is uniformly mixed forms A, B component mixing
Thing；When injection starts, the valve of mixing head is opened, the fierce collision at a high speed of A, B component mixture, at pressures close to atmospheric pressure
Mould dipping natural fiber felt is flowed into, 30 parts of A, B material mixture is added to 70 parts of 20 layers of natural fibre in the present embodiment
In dimension felt, A, B component mixture are added according to this mass ratio on each layer of natural fiber felt, closed after mould is full of
Mould is placed in valve, matched moulds reaction solidification 10min under the pressure of 1.5MPa, and solidification temperature is 80 DEG C, from mould after cooling shaping
Product is taken out in tool.The mass fraction of natural fiber felt is 70% in the composite for obtaining, corresponding two kinds of reactions raw material
（Semi-hard polyurethane elastomeric component raw material）The percentage that A, B component account for gross mass is 30%, and the tensile strength of composite is
33MPa, impact strength is 35kj/m2, and the general tensile strength of common automotive trim panel is 25MPa or so, impact strength exists
30kj/m2, Comparatively speaking, tensile strength improves 32%, and impact strength improves 17%.
Disclosed above is only several specific embodiments of the application, but the application is not limited to this, any this area
Technical staff can think change, should all fall in the protection domain of the application.
Claims (7)
1. a kind of natural fiber strengthens polyurethane elastic composite, it is characterised in that by the component including following weight portion
It is made：
Natural fiber 30-70 parts,
Polyurethane elastomer 70-30 parts；
The polyurethane elastomer is 100-108 by weight ratio：A components and B the components synthesis of 100-101, wherein,
The A components are polyether mixture, mainly compare 100 including weight:0.1-1:The polyalcohol of 5-10, catalyst and addition
Agent；
The polyalcohol be selected from polyoxypropyleneglycol, polytetrahydrofuran diol, Polyoxyethylene glycol, polybutadiene diol
One or more；
The catalyst is selected from dibutyl tin laurate, stannous octoate, triethanolamine, one kind of diethylenetriamine or several
Kind；
The additive is selected from Isosorbide-5-Nitrae-butanediol, 3,3 '-two chloro- 4,4 '-diaminourea-diphenyl methane, trihydroxy methyl
One or more of propane；
The B components are isocyanates mixture, selected from 4 ˊ of the ﹐ of diphenyl methane-4-diisocyanate TDI, toluene two
One or more of isocyanates MDI, liquefaction toluene di-isocyanate(TDI) MDI；
The preparation method of natural fiber enhancing polyurethane elastic composite is comprised the following steps：
（1）Pretreatment：
The mould of automotive trim plate shape that will want to be made is preheating to 20 DEG C -60 DEG C；
Selection thickness is the continuous natural fiber felt of 0.1-10mm, and natural fiber felt is cut into the fibre of mold shape size
Dimension felt, is then fed into warmed-up mould；
A components and B components are respectively put into head tank and its temperature is kept at 25 DEG C -40 DEG C, matter is measured afterwards
Amount is than being 100-108:The A components and B components of 100-101 make it into mixing head and are uniformly mixed, and form A, B group
Divide mixture；
（2）Mold filling：
When injection starts, the valve of mixing head is opened, and A, B component mixture flow into mould leaching at pressures close to atmospheric pressure
Stain natural fiber felt, A, B component mixture of 30-70 weight portions are added to 1-20 layers of natural fibre of 70-30 weight portions
In dimension felt, A, B component mixture are added according to identical mass ratio on each of which layer natural fiber felt, treat that mould is full of
After close valve, matched moulds；
（3）Solidification：Mould is placed in solidification 10-30min is reacted under 1-5MPa pressure, solidification temperature is 60 DEG C -100 DEG C, cold
But product is removed from the molds after being molded, that is, obtains natural fiber enhancing polyurethane elastic composite.
2. the natural fiber as described in claim 1 strengthens polyurethane elastic composite, it is characterised in that described natural
The parts by weight of fiber are preferred 50-70 parts；The parts by weight of the polyurethane elastomer are preferred 30-50 parts.
3. the natural fiber as described in claim 1 or 2 strengthens polyurethane elastic composite, it is characterised in that described
Natural fiber is selected from one or more in jute, sisal hemp, hemp, flax, ramie.
4. the natural fiber as described in claim 1 or 2 strengthens polyurethane elastic composite, it is characterised in that described
Polyurethane elastomer is selected from the polyurethane elastomer of the polyurethane elastomer, soft polyurethane elastomer or semi-rigid of hard.
5. the natural fiber as described in claim 4 strengthens polyurethane elastic composite, it is characterised in that the poly- ammonia
The polyurethane elastomer of the preferred semi-rigid of ester elastomer or the polyurethane elastomer of hard.
6. a kind of natural fiber as any one of claim 1-5 strengthens the preparation side of polyurethane elastic composite
Method, it is characterised in that comprise the following steps：
（1）Pretreatment：
The mould of automotive trim plate shape that will want to be made is preheating to 20 DEG C -60 DEG C；
Selection thickness is the continuous natural fiber felt of 0.1-10mm, and natural fiber felt is cut into the fibre of mold shape size
Dimension felt, is then fed into warmed-up mould；
A components and B components are respectively put into head tank and its temperature is kept at 25 DEG C -40 DEG C, matter is measured afterwards
Amount is than being 100-108:The A components and B components of 100-101 make it into mixing head and are uniformly mixed, and form A, B group
Divide mixture；
（2）Mold filling：
When injection starts, the valve of mixing head is opened, and A, B component mixture flow into mould leaching at pressures close to atmospheric pressure
Stain natural fiber felt, A, B component mixture of 30-70 weight portions are added to 1-20 layers of natural fibre of 70-30 weight portions
In dimension felt, A, B component mixture are added according to identical mass ratio on each of which layer natural fiber felt, treat that mould is full of
After close valve, matched moulds；
（3）Solidification：Mould is placed in solidification 10-30min is reacted under 1-5MPa pressure, solidification temperature is 60 DEG C -100 DEG C, cold
But product is removed from the molds after being molded, that is, obtains natural fiber enhancing polyurethane elastic composite.
7. natural fiber as claimed in claim 6 strengthens the preparation method of polyurethane elastic composite, it is characterised in that
The step（1）The preheating temperature of middle mould is 40 DEG C -60 DEG C；The preferred 0.2-5mm of thickness of natural fiber felt；
The step（2）In, A, B component mixture is 30-50 weight portions, and the natural fiber felt is 70-50 weight
Part；
The step（3）In, the preferred 1-2MPa of solidifying pressure, preferably 80 DEG C -90 DEG C of solidification temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120944.3A CN103374220B (en) | 2012-04-24 | 2012-04-24 | Natural fiber enhancing polyurethane elastic composite and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210120944.3A CN103374220B (en) | 2012-04-24 | 2012-04-24 | Natural fiber enhancing polyurethane elastic composite and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103374220A CN103374220A (en) | 2013-10-30 |
| CN103374220B true CN103374220B (en) | 2017-06-06 |
Family
ID=49460088
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210120944.3A Active CN103374220B (en) | 2012-04-24 | 2012-04-24 | Natural fiber enhancing polyurethane elastic composite and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103374220B (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105331085A (en) * | 2015-10-30 | 2016-02-17 | 嘉善贝马五金配件有限公司 | Polyurethane automobile interior decorating material toughened by wood fiber and preparation method of polyurethane automobile interior decorating material |
| CN105331088A (en) * | 2015-11-18 | 2016-02-17 | 许劼 | Pultrusion PU (polyurethane) resin composite material and preparation method thereof |
| CN105951470A (en) * | 2016-04-29 | 2016-09-21 | 南京理工大学 | Automobile interior decorative part made of fibrilia-enhanced foams and manufacturing method thereof |
| CN106243681B (en) * | 2016-08-02 | 2017-07-04 | 陕西理工大学 | A kind of preparation method of ramie crystallite/graphene nanometer sheet modified TPU microperforated sheet |
| CN107033580B (en) * | 2017-04-14 | 2019-12-13 | 郑州大学 | Thermoplastic polyurethane fiber composite material and preparation method and application thereof |
| CN109096741B (en) * | 2017-06-21 | 2021-01-01 | 中国人民解放军国防科学技术大学 | Polyurethane-based sound absorption material with high-molecular spiral spring fibers and preparation method thereof |
| CN109651834A (en) * | 2018-11-26 | 2019-04-19 | 浙江炬利汽车零部件有限公司 | A kind of environmentally friendly vehicle foot pad material and preparation method thereof |
| CN111171275B (en) * | 2020-01-13 | 2021-07-16 | 华南理工大学 | Sand-water abrasion resistant polyurethane material for pipeline lining and preparation method and application thereof |
| CN112457655A (en) * | 2020-11-30 | 2021-03-09 | 宁海宏德新材料科技有限公司 | Vibration-damping wear-resistant material and preparation method and application thereof |
| CN114478998B (en) * | 2022-02-28 | 2023-06-02 | 山东交通学院 | Composite material for plate spring and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177525A (en) * | 2006-11-08 | 2008-05-14 | 上海昊海化工有限公司 | Fibre-reinforced polyurethane modified polyisocyanurate composite material and preparation method thereof |
-
2012
- 2012-04-24 CN CN201210120944.3A patent/CN103374220B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101177525A (en) * | 2006-11-08 | 2008-05-14 | 上海昊海化工有限公司 | Fibre-reinforced polyurethane modified polyisocyanurate composite material and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 天然纤维增强聚氨酯制汽车部件;方谷;《聚氨酯工业》;19990815(第3期);第27页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103374220A (en) | 2013-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103374220B (en) | Natural fiber enhancing polyurethane elastic composite and preparation method thereof | |
| CN101191010B (en) | Fibre enhancement modifying method for polyurethane foam plastic | |
| CN101177525B (en) | Fibre-reinforced polyurethane modified polyisocyanurate composite material and preparation method thereof | |
| CN107523038B (en) | Graphene polyurethane composite material and preparation method thereof | |
| CN104781302B (en) | Tetramine containing polyethylene for resin transfer moulding method and the epoxy-resin systems of triethylenediamine catalyst | |
| CN103497503B (en) | A kind of lightweight compound sleeper and preparation method thereof | |
| CN103570961A (en) | Continuous fiber fabric reinforced thermoplastic polyurethane composite material and preparation method thereof | |
| CN103619901B (en) | Thermoset composition and the method preparing fibre reinforced composites | |
| CN103619895B (en) | Fiber composite component and preparation method thereof | |
| CN106009028B (en) | A kind of preparation method of colored or double-colored TPU expanded beads molding bonded body | |
| CN109456590B (en) | Non-adhesive integrally-formed composite sleeper and manufacturing method and device thereof | |
| CN101275012A (en) | Short fibre-reinforced polyurethane foam material and preparation thereof | |
| CN102825712B (en) | Manufacturing technology of automobile instrument desk | |
| CN103012738A (en) | Modified fly ash reinforced hard polyurethane foam material and preparation method thereof | |
| CN103435861A (en) | Tire transition layer and preparation method thereof | |
| CN105294991A (en) | Cold cure high resilient foam and preparation method | |
| CN110054744A (en) | Modified epoxy enhances polyurethane combined material and its preparation method and application | |
| CN101475738B (en) | Glass fibre reinforced plastic and leisure seat made thereof | |
| CN103589137A (en) | Quickly molded polyurethane and hemp fiber composite plate based on HP-RTM (high pressure-resin transfer molding) technology | |
| RU2012144348A (en) | METHOD FOR PRODUCING POLYURETHANES REINFORCED BY LONG FIBERS, WHICH CONTAIN GRANULATED FILLERS | |
| CN109397718A (en) | A kind of inner plate of car door sandwich polyurethane foam pad and preparation method | |
| WO2015142771A1 (en) | Epoxy resin system | |
| JPS5829816A (en) | Production of polyurethane | |
| CN114478998B (en) | Composite material for plate spring and preparation method thereof | |
| JPH1158534A (en) | Manufacture of fiber reinforced urethane resin multi-layer foam |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Natural fiber-reinforced polyurethane elastomer composite material and preparation method thereof Effective date of registration: 20191202 Granted publication date: 20170606 Pledgee: Chuzhou economic and Technological Development Corporation Pledgor: Shanghai Jieshijie New Materials (Group) Co., Ltd. Registration number: Y2019980000815 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |