CN103568331A - Preparation method and product of glass fabric reinforced thermoplastic polyurethane composite material - Google Patents
Preparation method and product of glass fabric reinforced thermoplastic polyurethane composite material Download PDFInfo
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- CN103568331A CN103568331A CN201210285009.2A CN201210285009A CN103568331A CN 103568331 A CN103568331 A CN 103568331A CN 201210285009 A CN201210285009 A CN 201210285009A CN 103568331 A CN103568331 A CN 103568331A
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- thermoplastic polyurethane
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- 239000004433 Thermoplastic polyurethane Substances 0.000 title claims abstract description 109
- 229920002803 thermoplastic polyurethane Polymers 0.000 title claims abstract description 109
- 239000004744 fabric Substances 0.000 title claims abstract description 69
- 239000002131 composite material Substances 0.000 title claims abstract description 47
- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 239000011521 glass Substances 0.000 title abstract 6
- 238000000465 moulding Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 20
- 238000010438 heat treatment Methods 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 26
- 238000005520 cutting process Methods 0.000 claims description 16
- 239000003795 chemical substances by application Substances 0.000 claims description 11
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 claims description 10
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- 229910052799 carbon Inorganic materials 0.000 claims description 8
- 238000001291 vacuum drying Methods 0.000 claims description 8
- 229920001296 polysiloxane Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 239000002904 solvent Substances 0.000 claims description 6
- 230000000873 masking effect Effects 0.000 claims description 5
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 4
- 230000002708 enhancing effect Effects 0.000 claims description 4
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 claims description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- -1 polytetrafluoroethylene Polymers 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- WFKAJVHLWXSISD-UHFFFAOYSA-N isobutyramide Chemical compound CC(C)C(N)=O WFKAJVHLWXSISD-UHFFFAOYSA-N 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000013557 residual solvent Substances 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 abstract description 8
- 239000003365 glass fiber Substances 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract description 4
- 230000008018 melting Effects 0.000 abstract description 4
- 229920003023 plastic Polymers 0.000 abstract description 3
- 239000004033 plastic Substances 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract 1
- 238000007731 hot pressing Methods 0.000 abstract 1
- 238000010309 melting process Methods 0.000 abstract 1
- 238000009740 moulding (composite fabrication) Methods 0.000 abstract 1
- 238000003825 pressing Methods 0.000 abstract 1
- 238000009736 wetting Methods 0.000 abstract 1
- 239000000835 fiber Substances 0.000 description 14
- 239000012779 reinforcing material Substances 0.000 description 9
- 238000005452 bending Methods 0.000 description 7
- 230000002787 reinforcement Effects 0.000 description 7
- 239000011199 continuous fiber reinforced thermoplastic Substances 0.000 description 6
- 238000011056 performance test Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 238000005470 impregnation Methods 0.000 description 5
- 239000012815 thermoplastic material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 238000001802 infusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002759 woven fabric Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011160 polymer matrix composite Substances 0.000 description 1
- 229920013657 polymer matrix composite Polymers 0.000 description 1
- 229920006264 polyurethane film Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Classifications
-
- 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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
-
- 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
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
The invention discloses a preparation method and product of a glass fabric reinforced thermoplastic polyurethane composite material. The preparation method comprises the following steps: (1) preparing a thermoplastic polyurethane solution; (2) pouring the thermoplastic polyurethane solution in a molding vessel, drying, cooling and demolding to obtain thermoplastic polyurethane films; (3) overlapping glass fabric between two layers of thermoplastic polyurethane films, heating, pressing and forming so as to immerse the thermoplastic polyurethane in the glass fiber, thus obtaining a glass fabric pre-immersed sheet; (4) clipping and laying the glass fabric pre-immersed sheet obtained in the step (3), hot-pressing and forming to obtain the glass fabric reinforced thermoplastic polyurethane composite material. Compared with the existing method of melting and wetting the thermoplastic plastic, the melting process of the plastic in the pre-immersed sheet is saved, the equipment investment is reduced, the operation is simple, and the thermoplastic polyurethane can be uniformly distributed in fiber-reinforced layer to improve the performance of the obtained laminated composite material.
Description
Technical field
The invention belongs to material technology field, relate to a kind of glass-fiber-fabric and strengthen preparation method of thermoplastic polyurethane composite and products thereof.
Background technology
Continuous fiber reinforced thermoplastic plastic (Continuous Fiber Reinforced Thermoplastic Plastics is called for short CFRTP) is a kind of polymer matrix composite of early 1970s exploitation.It is mainly comprised of thermoplastic resin matrix and continuous fortifying fibre, and resin is evenly distributed between fiber, forms continuous phase, with the locus of anchoring fiber, and in material internal transmitted load, gives the good mechanical property of material, processing characteristics etc.Continuous fiber can adopt glass fibre, carbon fiber, aramid fiber etc., wherein comparatively conventional with glass fibre again.CFRTP has than continuous fiber reinforced thermosetting plastics advantage that following several respects are outstanding: (1) prepreg can long preservation; (2) high comprehensive performance particularly still can keep good mechanical property under high temperature, high humility; (3) moulding wide adaptability, production efficiency are high; (4) goods can repeat processing, regeneration.In recent years, continuous glass fibre reinforced thermoplastic plastics (CGFRTP) is more and more subject to various countries and payes attention to, and research application is very active.Mainly select at present the short reinforcing materials of impregnation time such as chopped strand, long fibre, continuous felt both at home and abroad, but adopt continuous-filament woven fabric to there is more excellent performance as reinforcing material, therefore develop continuous-filament woven fabric enhancing compound polyurethane material significant.
Generally, the need of production of continuous fiber reinforced thermoplastic plastic composite is through two processes: the preparation of (1) sheet material (prepreg); (2) moulding of product.At present, the method for preparing continuous fiber reinforced thermoplastic plastic composite has the multiple technologies of preparing such as solution dipping method, melt impregnation method, powder infusion process, pulpous state resin precipitated method, shuffling method, pellicular cascade method and reaction infusion process.
What the most frequently used, use scale was the widest at present is melt impregnation method, melt impregnation method is by thermoplastic polyurethane heating and melting, again the thermoplastic polyurethane of fusing is immersed in fiber by pressurization, make prepreg, and then prepreg stack heating, pressurization are made to composite.And pellicular cascade method is fiber-reinforced layer and thermoplastic material film's stack, then heat, pressurizeing immerses in reinforcing material plastics, this method has been saved the melting of thermoplastic polyurethane in melt impregnation method, thereby the input that reduces equipment, operates fairly simple, and is convenient to the preparation of composite, owing to having used film, can guarantee the uniformity that thermoplastic polyurethane distributes, can make thermoplastic be evenly distributed in fiber, make high-quality laminated product.
Summary of the invention
The object of the present invention is to provide a kind of glass-fiber-fabric to strengthen method of thermoplastic polyurethane composite and products thereof.
For achieving the above object, the present invention is by the following technical solutions:
Glass-fiber-fabric strengthens a preparation method for thermoplastic polyurethane composite, comprises following steps:
(1) prepare thermoplastic polyurethane solution;
(2) above-mentioned thermoplastic polyurethane solution is poured in molding vessel, dry, cooling demoulding, obtains thermoplastic polyurethane film;
(3) glass-fiber-fabric the is added to centre of two layers of thermoplastic polyurethane film, then heating, extrusion forming, be immersed in glass-fiber-fabric thermoplastic polyurethane, makes glass-fiber-fabric preimpregnation sheet material;
(4) according to composite desired thickness, the cutting of glass-fiber-fabric preimpregnation sheet material, laying that step (3) is made, and hot-forming, obtain glass-fiber-fabric and strengthen thermoplastic polyurethane composite.
In described step (1), thermoplastic polyurethane liquid quality fraction is 5～20%, and solvent is one or more of oxolane, dimethyl formamide, dimethylacetylamide, dimethyl sulfoxide (DMSO), gamma-butyrolacton or 1-METHYLPYRROLIDONE.
Being dried of described step (2) is: the thermoplastic polyurethane solution that step (1) is made is poured in flat vessel, dry 10～30min at 100～130 ℃, then at 160～190 ℃, be placed on 10～30min in vacuum drying oven, remove residual solvent.
The masking vessel surface spraying of described step (2) has releasing agent.
Described releasing agent is selected from polytetrafluoroethylene (PTFE) or silicone, with vaporific ejection, maybe can make thermoplastic polyurethane film take off smoothly the whole coverings of masking inner wall of utensil.Releasing agent plays the effect that thermoplastic polyurethane film does not adhere to masking inner wall of utensil, and be convenient to thermoplastic polyurethane film and take off from masking vessel, not a part for polyurethane film.
The thermoplastic polyurethane of described step (1) is U.S. Lu Borun HS85D thermoplastic polyurethane, and normal temperature lower density is 1.215g/cm
3.
The thickness of the thermoplastic polyurethane film making in described step (2) is 0.071～0.165mm.
In described step (3), heating-up temperature is 220～240 ℃, and moulding pressure is 2～4MPa, and molding time is 30～90s.
The surface density of described glass-fiber-fabric is 400g/m
2the RWR400 product that ，Wei megalith group produces, is made by continuous long glass fiber.
The gel content of the glass-fiber-fabric preimpregnation sheet material making in described step (3) is 30～50%, and wherein gel content is:
In described step (4), hot-forming pressure is 4～6MPa, and temperature is 220～240 ℃, and molding time is 5～10min.
In described step (4), the gel content of glass-fiber-fabric enhancing thermoplastic polyurethane composite is 30～50%.
The glass-fiber-fabric that a kind of said method makes strengthens thermoplastic polyurethane composite.
The gel content of described compound polyurethane material is 30～50%.
The present invention has following beneficial effect:
Method of the present invention is compared with existing molten thermoplastic plastics infiltration method, the pellicular cascade legal system that the present invention adopts strengthens thermoplastic polyurethane composite for glass-fiber-fabric, saved the melting of plastics in preimpregnation sheet material, reduced the input of equipment, operate fairly simple, and can make thermoplastic polyurethane be evenly distributed to fiber-reinforced layer, improved the performance of gained laminar composite.The method that the present invention prepares glass-fiber-fabric enhancing thermoplastic polyurethane composite is simpler, feasible, is applicable to medium-sized and small enterprises and scientific research institution and uses.
The specific embodiment
Now by following embodiment, the present invention is further illustrated.
Following glass-fiber-fabric is the RWR400 product that megalith group produces, and by continuous long glass fiber, is made, and surface density is 400g/m
2.
Following thermoplastic polyurethane is U.S. Lu Borun HS85D thermoplastic polyurethane, and normal temperature lower density is 1.215g/cm
3.
Embodiment 1
(1) take thermoplastic polyurethane, thermoplastic polyurethane is added in tetrahydrofuran solvent, under heating, be stirred to completely and dissolve, the thermoplastic polyurethane solution that preparation mass fraction is 15%;
(2) take thermoplastic polyurethane solution 22.87g prepared by above-mentioned steps (1) and pour the 20 * 20cm that scribbles silicone release agent into
2in flat vessel, dry 20min at 110 ℃, then at 170 ℃, be placed on 10min in vacuum drying oven, cooling demoulding, obtains the thermoplastic polyurethane film that thickness is 0.071mm;
(3) thermoplastic polyurethane film above-mentioned steps (2) being obtained carries out cutting according to the size of glass-fiber-fabric, and cutting size is 15 * 15cm
2by glass-fiber-fabric fiber-reinforced layer and the two-layer thermoplastic polyurethane film stack cutting out, fibre reinforcement is put in centre position, then heats 220 ℃, pressurization 4MPa, molding time 30s, thermoplastic polyurethane is immersed in reinforcing material, the glass-fiber-fabric preimpregnation sheet material that preparation gel content is 30%;
(4) according to the thickness of required composite, glass-fiber-fabric preimpregnation sheet material is carried out to laying, stack, be placed on vulcanizing press laminated into type, pressure is 5MPa, and temperature is 230 ℃, and molding time is 8min, prepare glass-fiber-fabric and strengthen thermoplastic polyurethane composite, its gel content is 30%.
The glass-fiber-fabric making is strengthened to thermoplastic polyurethane composite board and according to GB/T 1449-2005, be prepared into the bend specimen of 15mm * 120mm, carry out performance test, test result is in Table 1.
Embodiment 2
(1) take thermoplastic polyurethane, thermoplastic polyurethane is added in dimethylacetamide solvent, under heating, be stirred to completely and dissolve, the thermoplastic polyurethane solution that preparation mass fraction is 15%;
(2) take thermoplastic polyurethane solution 35.56g prepared by above-mentioned steps (1) and pour the 20 * 20cm that scribbles polytetrafluoroethylene (PTFE) releasing agent into
2in flat vessel, dry 20min at 100 ℃, then at 160 ℃, be placed on 20min in vacuum drying oven,, cooling demoulding, obtains the thermoplastic polyurethane film that thickness is 0.110mm;
(3) thermoplastic polyurethane film above-mentioned steps (2) being obtained carries out cutting according to the size of glass-fiber-fabric, and cutting size is 15 * 15cm
2by glass-fiber-fabric fiber-reinforced layer and the stack of above-mentioned two layers of thermoplastic material film, fibre reinforcement is put in centre position, then heats 230 ℃, pressurization 3MPa, molding time 60s, thermoplastic polyurethane is immersed in reinforcing material, the glass-fiber-fabric preimpregnation sheet material that preparation gel content is 40%;
(4) according to the thickness of required composite, glass-fiber-fabric preimpregnation sheet material is carried out to laying, stack, be placed on vulcanizing press laminated into type, pressure is 4MPa, and temperature is 220 ℃, and molding time is 10min, prepare glass-fiber-fabric and strengthen thermoplastic polyurethane composite, its gel content is 40%.
The glass-fiber-fabric making is strengthened to thermoplastic polyurethane composite board and according to GB/T 1449-2005, be prepared into the bend specimen of 15mm * 120mm, carry out performance test, test result is in Table 1.
Embodiment 3
(1) take thermoplastic polyurethane, thermoplastic polyurethane is added in gamma-butyrolacton or 1-METHYLPYRROLIDONE solvent, under heating, be stirred to completely and dissolve, the thermoplastic polyurethane solution that preparation mass fraction is 15%;
(2) take thermoplastic polyurethane solution 53.33g prepared by above-mentioned steps (1) and pour the 20 * 20cm that scribbles silicone release agent into
2in flat vessel, dry 20min at 110 ℃, then at 170 ℃, be placed on 20min in vacuum drying oven, cooling demoulding, obtains the thermoplastic polyurethane film that thickness is 0.165mm;
(3) thermoplastic polyurethane film above-mentioned steps (2) being obtained carries out cutting according to the size of glass-fiber-fabric, and cutting size is 15 * 15cm
2by glass-fiber-fabric fiber-reinforced layer and the stack of above-mentioned two layers of thermoplastic material film, fibre reinforcement is put in centre position, then heats 240 ℃, pressurization 2MPa, molding time 90s, thermoplastic polyurethane is immersed in reinforcing material, the glass-fiber-fabric preimpregnation sheet material that preparation gel content is 50%;
(4) according to the thickness of required composite, glass-fiber-fabric preimpregnation sheet material is carried out to laying, stack, be placed on vulcanizing press laminated into type, pressure is 6MPa, and temperature is 240 ℃, and molding time is 5min, prepare glass-fiber-fabric and strengthen thermoplastic polyurethane composite, its gel content is 50%.
The glass-fiber-fabric making is strengthened to thermoplastic polyurethane composite board and according to GB/T 1449-2005, be prepared into the bend specimen of 15mm * 120mm, carry out performance test, test result is in Table 1.
Embodiment 4
(1) take thermoplastic polyurethane, thermoplastic polyurethane is added in solvent dimethylformamide, under heating, be stirred to completely and dissolve, the thermoplastic polyurethane solution that preparation mass fraction is 5%;
(2) take thermoplastic polyurethane solution 106.63g prepared by above-mentioned steps (1) and pour the 20 * 20cm that scribbles silicone release agent into
2in flat vessel, dry 10min at 130 ℃, then at 180 ℃, be placed on 30min in vacuum drying oven, and cooling demoulding, obtaining thickness is 0.110mm thermoplastic polyurethane film;
(3) thermoplastic polyurethane film above-mentioned steps (2) being obtained carries out cutting according to the size of glass-fiber-fabric, and cutting size is 15 * 15cm
2by glass-fiber-fabric fiber-reinforced layer and the stack of above-mentioned two layers of thermoplastic material film, fibre reinforcement is put in centre position, then heats 210 ℃, pressurization 3MPa, molding time 60s, thermoplastic polyurethane is immersed in reinforcing material, the glass-fiber-fabric preimpregnation sheet material that preparation gel content is 40%;
(4) according to the thickness of required composite, glass-fiber-fabric preimpregnation sheet material is carried out to laying, stack, be placed on vulcanizing press laminated into type, pressure is 4MPa, and temperature is 220 ℃, and molding time is 10min, prepare glass-fiber-fabric and strengthen thermoplastic polyurethane composite, its gel content is 40%.
The glass-fiber-fabric making is strengthened to thermoplastic polyurethane composite board and according to GB/T 1449-2005, be prepared into the bend specimen of 15mm * 120mm, carry out performance test, test result is in Table 1.
Embodiment 5
(1) take thermoplastic polyurethane, thermoplastic polyurethane is added in dimethyl sulfoxide solvent, under heating, be stirred to completely and dissolve, the thermoplastic polyurethane solution that preparation mass fraction is 20%;
(2) take thermoplastic polyurethane solution 26.66g prepared by above-mentioned steps (1) and pour the 20 * 20cm that scribbles silicone release agent into
2in flat vessel, dry 30min at 120 ℃, then at 190 ℃, be placed on 10min in vacuum drying oven, and cooling demoulding, obtaining thickness is 0.110mm thermoplastic polyurethane film;
(3) thermoplastic polyurethane film above-mentioned steps (2) being obtained carries out cutting according to the size of glass-fiber-fabric, and cutting size is 15 * 15cm
2by glass-fiber-fabric fiber-reinforced layer and the stack of above-mentioned two layers of thermoplastic material film, fibre reinforcement is put in centre position, then heats 210 ℃, pressurization 3MPa, molding time 60s, thermoplastic polyurethane is immersed in reinforcing material, the glass-fiber-fabric preimpregnation sheet material that preparation gel content is 40%;
(4) according to the thickness of required composite, glass-fiber-fabric preimpregnation sheet material is carried out to laying, stack, be placed on vulcanizing press laminated into type, pressure is 4MPa, and temperature is 220 ℃, and molding time is 10min, prepare glass-fiber-fabric and strengthen thermoplastic polyurethane composite, its gel content is 40%.
The glass-fiber-fabric making is strengthened to thermoplastic polyurethane composite board and according to GB/T 1449-2005, be prepared into the bend specimen of 15mm * 120mm, carry out performance test, test result is in Table 1.
Embodiment 6
(1) take thermoplastic polyurethane, thermoplastic polyurethane is added in tetrahydrofuran solvent, under heating, be stirred to completely and dissolve, the thermoplastic polyurethane solution that preparation mass fraction is 8.57%;
(2) take the thermoplastic polyurethane solution 66.69g that above-mentioned steps (1) makes and pour the 20 * 20cm that scribbles silicone release agent into
2in flat vessel, dry 20min at 110 ℃, then at 170 ℃, be placed on 10min in vacuum drying oven, and cooling demoulding, obtaining thickness is 0.118mm thermoplastic polyurethane film;
(3) thermoplastic polyurethane film above-mentioned steps (2) being obtained carries out cutting according to the size of glass-fiber-fabric, and cutting size is 15 * 15cm
2by glass-fiber-fabric fiber-reinforced layer and the two-layer thermoplastic polyurethane film stack cutting out, fibre reinforcement is put in centre position, then heats 220 ℃, pressurization 4MPa, molding time 30s, thermoplastic polyurethane is immersed in reinforcing material, the glass-fiber-fabric preimpregnation sheet material that preparation gel content is 41.67%;
(4) according to the thickness of required composite, glass-fiber-fabric preimpregnation sheet material is carried out to laying, stack, be placed on vulcanizing press laminated into type, pressure is 5MPa, and temperature is 230 ℃, and molding time is 8min, prepare glass-fiber-fabric and strengthen thermoplastic polyurethane composite, its gel content is 41.67%.
The glass-fiber-fabric making is strengthened to thermoplastic polyurethane composite board and according to GB/T 1449-2005, be prepared into the bend specimen of 15mm * 120mm, carry out performance test, test result is in Table 1.
The bending property of table 1 composite
From table 1, embodiment 1-3 and 6 can find out, along with the raising of gel content, bending strength and the bending modulus of composite but decrease, and this is because resin content increases, reduce the relativity of reinforcement glass-fiber-fabric in composite, caused bending strength and bending modulus to reduce.From table 1, embodiment 2,4 and 5 can find out, variable concentrations thermoplastic polyurethane solution is prepared gel content while being 40% composite, and bending strength and bending modulus change less, illustrate that composite material and preparation method thereof of the present invention is more stable.
The above-mentioned description to embodiment is can understand and apply the invention for ease of those skilled in the art.Person skilled in the art obviously can easily make various modifications to these embodiment, and General Principle described herein is applied in other embodiment and needn't passes through performing creative labour.Therefore, the invention is not restricted to the embodiment here, those skilled in the art are according to announcement of the present invention, and not departing from the improvement that category of the present invention makes and revise all should be within protection scope of the present invention.
Claims (10)
1. glass-fiber-fabric strengthens a preparation method for thermoplastic polyurethane composite, it is characterized in that: comprise following steps:
(1) prepare thermoplastic polyurethane solution;
(2) above-mentioned thermoplastic polyurethane solution is poured in molding vessel, dry, cooling demoulding, obtains thermoplastic polyurethane film;
(3) glass-fiber-fabric the is added to centre of two layers of thermoplastic polyurethane film, then heating, extrusion forming, be immersed in glass-fiber-fabric thermoplastic polyurethane, makes glass-fiber-fabric preimpregnation sheet material;
(4) cutting of glass-fiber-fabric preimpregnation sheet material, the laying that step (3) are made, and hot-forming, obtain glass-fiber-fabric and strengthen thermoplastic polyurethane composite.
2. preparation method according to claim 1, it is characterized in that: in described step (1), thermoplastic polyurethane liquid quality fraction is 5～20%, and solvent is one or more of oxolane, dimethyl formamide, dimethylacetylamide, dimethyl sulfoxide (DMSO), gamma-butyrolacton or 1-METHYLPYRROLIDONE;
Or being dried of described step (2) is: the thermoplastic polyurethane solution that step (1) is made is poured in flat vessel, dry 10～30min at 100～130 ℃, then at 160～190 ℃, be placed on 10～30min in vacuum drying oven, remove residual solvent.
3. preparation method according to claim 1, is characterized in that: the masking vessel surface spraying of described step (2) has releasing agent.
4. preparation method according to claim 3, is characterized in that: described releasing agent is selected from polytetrafluoroethylene (PTFE) or silicone.
5. preparation method according to claim 1, is characterized in that: the thermoplastic polyurethane normal temperature lower density of described step (1) is 1.215g/cm
3;
Or the thickness of the thermoplastic polyurethane film that makes of described step (2) is 0.071～0.165mm.
6. preparation method according to claim 1, is characterized in that: in described step (3), heating-up temperature is 220～240 ℃, and moulding pressure is 2～4MPa, and molding time is 30～90s.
7. preparation method according to claim 1, is characterized in that: the gel content of the glass-fiber-fabric preimpregnation sheet material making in described step (3) is 30～50%.
8. preparation method according to claim 1, is characterized in that: in described step (4), hot-forming pressure is 4～6MPa, and temperature is 220～240 ℃, and molding time is 5～10min;
Or in described step (4), the gel content of glass-fiber-fabric enhancing thermoplastic polyurethane composite is 30～50%.
9. the glass-fiber-fabric that in a claims 1-8, arbitrary described method makes strengthens thermoplastic polyurethane composite.
10. glass-fiber-fabric according to claim 9 strengthens thermoplastic polyurethane composite, it is characterized in that: the gel content of described compound polyurethane material is 30～50%.
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| CN201210285009.2A CN103568331A (en) | 2012-08-10 | 2012-08-10 | Preparation method and product of glass fabric reinforced thermoplastic polyurethane composite material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107866935A (en) * | 2017-06-06 | 2018-04-03 | 湖北航天化学技术研究所 | A kind of thermoplastic polyurethane product forming process for being used for extraordinary airtight clothes |
| CN111491783A (en) * | 2017-12-28 | 2020-08-04 | 科思创德国股份有限公司 | Fiber-reinforced composite material and method for producing same |
-
2012
- 2012-08-10 CN CN201210285009.2A patent/CN103568331A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107866935A (en) * | 2017-06-06 | 2018-04-03 | 湖北航天化学技术研究所 | A kind of thermoplastic polyurethane product forming process for being used for extraordinary airtight clothes |
| CN107866935B (en) * | 2017-06-06 | 2020-02-11 | 湖北航天化学技术研究所 | Thermoplastic polyurethane product forming process for special airtight garment |
| CN111491783A (en) * | 2017-12-28 | 2020-08-04 | 科思创德国股份有限公司 | Fiber-reinforced composite material and method for producing same |
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