CN104530560A - Long-fiber reinforce thermoplastic direct (LFT-D) forming method for molded long whisker/glass fiber reinforced thermoplastic composite - Google Patents
Long-fiber reinforce thermoplastic direct (LFT-D) forming method for molded long whisker/glass fiber reinforced thermoplastic composite Download PDFInfo
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- CN104530560A CN104530560A CN201410798563.XA CN201410798563A CN104530560A CN 104530560 A CN104530560 A CN 104530560A CN 201410798563 A CN201410798563 A CN 201410798563A CN 104530560 A CN104530560 A CN 104530560A
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- temperature
- screw extruder
- forming method
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- whisker
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
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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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/58—Measuring, controlling or regulating
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
Abstract
The invention provides a long-fiber reinforce thermoplastic direct (LFT-D) forming method for a molded long whisker/glass fiber reinforced thermoplastic composite. The forming method comprises the following steps: mixing calcium sulfate whisker and polypropylene (PP) according to a mass ratio of (7-15%) to (95-85%), adding 3-5% of industrial white oil and mixing by virtue of a high-speed mixer; melting and plasticizing the mixed materials by virtue of a first-order screw extruder, adding modified glass fiber together with the mixed materials melted and plasticized by the first-order screw extruder to a second-order screw extruder according to mass ratio of 3 to 7, melting, mixing and extruding; and conveying the mixed materials extruded from the second-order screw extruder into a mould pressing die, clamping the die and maintaining pressure so as to obtain a finished product. By adding the long whisker to the glass fiber/thermoplastic composite as the third element, the forming method disclosed by the invention can be used for improving the strength and modulus thereof and can be used for reducing production cost.
Description
Technical field
The present invention relates to a kind of LFT-D forming method of matrix material.
Background technology
In LFT-D glass fiber reinforced thermoplastics composite, glass fibre length reaches 20 ~ 50mm, due to adding of glass fiber material, causes the strength of materials and modulus to increase, but still cannot realize high performance.
Whisker is a kind of single crystal fibre, and diameter is only micron order, and not existing defects (crystal boundary, dislocation, hole etc.), atomic arrangement high-sequential.The height-oriented structure of whisker makes it have high strength, high-modulus and high elongation rate, and intensity, far above other chopped strands, can be used for manufacturing high strength composite.
But at present not using long whisker as ternary, add in glass fibre/thermoplastic composite, improve composite material strength and modulus, and reduce production cost.
Summary of the invention
The technical problem to be solved in the present invention, be the LFT-D forming method that a kind of mold pressing long whisker/fiberglass reinforced thermoplastic composite is provided, using long whisker as ternary, add in glass fibre/thermoplastic composite, improve composite material strength and modulus, and reduce production cost.
The present invention is achieved in that the LFT-D forming method of a kind of mold pressing long whisker/fiberglass reinforced thermoplastic composite, comprises the steps:
Step 10, by calcium sulfate crystal whiskers and polypropylene PP according to (7 ~ 15%): the mass ratio of (95 ~ 85%), and the industrial white oil being incorporated as 3 ~ 5% of polypropylene and calcium sulfate crystal whiskers total mass is at high-speed mixer, rotating speed 12rpm/min, mixes 10 minutes;
Step 20, by compound by single order screw extrusion press fusion plastification, the rotating speed of described single order twin screw extruder is 140 ~ 180rpm/min, described single order twin screw extruder divides eight sections of heating, first paragraph temperature is 210 ~ 230 DEG C, second segment temperature is 200 ~ 220 DEG C, rear five sections of temperature are 210 ~ 230 DEG C, and head temperature is 210 ~ 230 DEG C;
Step 30, by modification glass with through single order screw extrusion press fusion plastification compound according to 3:7 mass ratio together with enter second order screw extrusion press melting mixing after extrude, the rotating speed of described second order twin screw extruder is 120 ~ 140rpm/min, and second order twin screw extruder divides six sections of heating, first paragraph temperature 220 ~ 240 DEG C, rear four sections of temperature are 210 ~ 230 DEG C, and extruder head temperature is 210 ~ 230 DEG C;
Step 40, the compound extruded through second order screw extrusion press are sent in molding die, and patrix temperature is 20 ~ 35 DEG C, and counterdie temperature is 10 ~ 20 DEG C, and molding pressure is 350 ~ 450Mpa, and matched moulds pressurize 70 ~ 80s, obtains goods.
Further, described calcium sulfate crystal whiskers is the calcium sulfate crystal whiskers with 0.5 ~ 1%KH550 process.
Tool of the present invention has the following advantages: the present invention using long whisker as ternary, add in glass fibre/thermoplastic composite, improve matrix material tensile strength and Young's modulus, bending property and unnotched impact strength also increase to some extent, and can also reduce production cost.
Accompanying drawing explanation
The present invention is further illustrated in conjunction with the embodiments with reference to the accompanying drawings.
Fig. 1 is the inventive method flowchart.
Embodiment
As shown in Figure 1, the LFT-D forming method of mold pressing of the present invention long whisker/fiberglass reinforced thermoplastic composite, comprises the steps:
Step 10, by with the calcium sulfate crystal whiskers of 0.5 ~ 1%KH550 process and polypropylene PP according to (7 ~ 15%): the mass ratio of (95 ~ 85%), and the industrial white oil being incorporated as 3 ~ 5% of polypropylene and calcium sulfate crystal whiskers total mass is at high-speed mixer, rotating speed 12rpm/min, mixes 10 minutes;
Step 20, by compound by single order screw extrusion press fusion plastification, the rotating speed of described single order twin screw extruder is 140 ~ 180rpm/min, described single order twin screw extruder divides eight sections of heating, first paragraph temperature is 210 ~ 230 DEG C, second segment temperature is 200 ~ 220 DEG C, rear five sections of temperature are 210 ~ 230 DEG C, and head temperature is 210 ~ 230 DEG C;
Step 30, by modification glass with through single order screw extrusion press fusion plastification compound according to 3:7 mass ratio together with enter second order screw extrusion press melting mixing after extrude, the rotating speed of described second order twin screw extruder is 120 ~ 140rpm/min, and second order twin screw extruder divides six sections of heating, first paragraph temperature 220 ~ 240 DEG C, rear four sections of temperature are 210 ~ 230 DEG C, and extruder head temperature is 210 ~ 230 DEG C;
Step 40, the compound extruded through second order screw extrusion press are sent in molding die by mechanical manipulator gripping, and patrix temperature is 20 ~ 35 DEG C, and counterdie temperature is 10 ~ 20 DEG C, and molding pressure is 350 ~ 450Mpa, and matched moulds pressurize 70 ~ 80s, obtains goods.
From above-mentioned contrast, the Young's modulus of the test sample of interpolation whisker and tensile strength are all higher than un-added sample, and bending property and unnotched impact strength increase all to some extent.In addition, from raw materials cost, current calcium sulfate crystal whiskers price is at about 8300 yuan/ton, polypropylene PP price is at about 13600 yuan/ton, product of the present invention like this adds the ratio calcium sulfate crystal whiskers of 10%, and product cost per ton can reduce by 530 yuan, obviously more economical.
Although the foregoing describe the specific embodiment of the present invention; but be familiar with those skilled in the art to be to be understood that; specific embodiment described by us is illustrative; instead of for the restriction to scope of the present invention; those of ordinary skill in the art, in the modification of the equivalence done according to spirit of the present invention and change, should be encompassed in scope that claim of the present invention protects.
Claims (2)
1. a LFT-D forming method for mold pressing long whisker/fiberglass reinforced thermoplastic composite, is characterized in that: comprise the steps:
Step 10, by calcium sulfate crystal whiskers and polypropylene PP according to (7 ~ 15%): the mass ratio of (95 ~ 85%), and the industrial white oil being incorporated as 3 ~ 5% of polypropylene and calcium sulfate crystal whiskers total mass is at high-speed mixer, rotating speed 12rpm/min, mixes 10 minutes;
Step 20, by compound by single order screw extrusion press fusion plastification, the rotating speed of described single order twin screw extruder is 140 ~ 180rpm/min, described single order twin screw extruder divides eight sections of heating, first paragraph temperature is 210 ~ 230 DEG C, second segment temperature is 200 ~ 220 DEG C, rear five sections of temperature are 210 ~ 230 DEG C, and head temperature is 210 ~ 230 DEG C;
Step 30, by modification glass with through single order screw extrusion press fusion plastification compound according to 3:7 mass ratio together with enter second order screw extrusion press melting mixing after extrude, the rotating speed of described second order twin screw extruder is 120 ~ 140rpm/min, and second order twin screw extruder divides six sections of heating, first paragraph temperature 220 ~ 240 DEG C, rear four sections of temperature are 210 ~ 230 DEG C, and extruder head temperature is 210 ~ 230 DEG C;
Step 40, the compound extruded through second order screw extrusion press are sent in molding die, and patrix temperature is 20 ~ 35 DEG C, and counterdie temperature is 10 ~ 20 DEG C, and molding pressure is 350 ~ 450Mpa, and matched moulds pressurize 70 ~ 80s, obtains goods.
2. the LFT-D forming method of mold pressing long whisker/fiberglass reinforced thermoplastic composite as claimed in claim 1, is characterized in that: described calcium sulfate crystal whiskers is the calcium sulfate crystal whiskers with 0.5 ~ 1%KH550 process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798563.XA CN104530560A (en) | 2014-12-19 | 2014-12-19 | Long-fiber reinforce thermoplastic direct (LFT-D) forming method for molded long whisker/glass fiber reinforced thermoplastic composite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410798563.XA CN104530560A (en) | 2014-12-19 | 2014-12-19 | Long-fiber reinforce thermoplastic direct (LFT-D) forming method for molded long whisker/glass fiber reinforced thermoplastic composite |
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| Publication Number | Publication Date |
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| CN104530560A true CN104530560A (en) | 2015-04-22 |
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| CN201410798563.XA Pending CN104530560A (en) | 2014-12-19 | 2014-12-19 | Long-fiber reinforce thermoplastic direct (LFT-D) forming method for molded long whisker/glass fiber reinforced thermoplastic composite |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367901A (en) * | 2015-12-04 | 2016-03-02 | 福建海源新材料科技有限公司 | Glass fiber-reinforced polypropylene composite material and LFT-D preparation method thereof |
| CN109878049A (en) * | 2018-12-31 | 2019-06-14 | 郑州翎羽新材料有限公司 | A kind of demoulding building template LFT-D forming method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693776A (en) * | 2009-09-18 | 2010-04-14 | 苏州禾盛新型材料股份有限公司 | Novel high-intensity high heat-resistance polypropylene modified composite material and preparation method thereof |
| CN104059293A (en) * | 2014-06-25 | 2014-09-24 | 福建海源新材料科技有限公司 | LFT-D (Long-Fiber Reinforce Thermoplastic Direct) forming method of building template filled with calcium carbonate |
-
2014
- 2014-12-19 CN CN201410798563.XA patent/CN104530560A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101693776A (en) * | 2009-09-18 | 2010-04-14 | 苏州禾盛新型材料股份有限公司 | Novel high-intensity high heat-resistance polypropylene modified composite material and preparation method thereof |
| CN104059293A (en) * | 2014-06-25 | 2014-09-24 | 福建海源新材料科技有限公司 | LFT-D (Long-Fiber Reinforce Thermoplastic Direct) forming method of building template filled with calcium carbonate |
Non-Patent Citations (1)
| Title |
|---|
| 山西省化工研究所 编: "《塑料橡胶加工助剂（第二版）》", 31 October 2002, 化学工业出版社 材料科学与工程出版中心 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367901A (en) * | 2015-12-04 | 2016-03-02 | 福建海源新材料科技有限公司 | Glass fiber-reinforced polypropylene composite material and LFT-D preparation method thereof |
| CN109878049A (en) * | 2018-12-31 | 2019-06-14 | 郑州翎羽新材料有限公司 | A kind of demoulding building template LFT-D forming method |
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Application publication date: 20150422 |