CN103665793A - Preparation method for low-floating-fiber flame-retardant reinforced PBT material - Google Patents
Preparation method for low-floating-fiber flame-retardant reinforced PBT material Download PDFInfo
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- CN103665793A CN103665793A CN201310657840.0A CN201310657840A CN103665793A CN 103665793 A CN103665793 A CN 103665793A CN 201310657840 A CN201310657840 A CN 201310657840A CN 103665793 A CN103665793 A CN 103665793A
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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
Abstract
The invention relates to the technical field of plastic modification, and especially relates to a preparation method for a low-floating-fiber flame-retardant reinforced PBT material. The preparation method comprises the following steps: stirring and mixing uniformly raw materials by using a high-speed stirrer, then sending to a double screw extruder for fusion extrusion, cooing and finally performing injection moulding to obtain the product. The raw materials comprise the following compositions in percent by mass: 55-70% of PBT, 5-15% of a flexibilizer, 10-20% of short-cut glass fiber, 10-15% of a flame retardant, 0.3-0.8% of a floating-fiber remover, and the balance a silane coupling agent, an anti-oxidant and a lubricant. The product prepared by employing the preparation method has the characteristics of low floating fiber, flame retardance and reinforced performances.
Description
Technical field
The present invention relates to modifying plastics technical field, particularly relate to a kind of preparation method of low floating fine flame-retardant enhanced PBT material.
background technology
Polybutylene terephthalate (being called for short PBT), belong to polyester series, by 1,4-butyleneglycol (1,4-Butylene glycol) form with terephthalic acid (PTA) or terephthalate (DMT) polycondensation, and the oyster white of making via mixing program is translucent to opaque, crystalline thermoplastic polyester's resin.Be referred to as thermoplastic polyester together with PET, or saturated polyester.
Because PBT has good thermotolerance, weathering resistance, resistance to chemical reagents, and electrical specification is good, water-absorbent is little, gloss is good, therefore be widely used in the fields such as electronic apparatus, auto parts, machinery, houseware, and the nominals such as PBT product and PPS, PC, POM, PA are the five large general engineering plastics of using.But there is following problems in traditional PBT product: 1, tend in use the unexpected situations such as burning that appearance causes due to factors such as naked light or static; 2, in injection moulding, make easily to occur that floating fine phenomenon surface flatness declines, outward appearance is poor, and impact is used.
For solving the problem of above-mentioned burning, Chinese invention patent application CN 102675837 A disclose < < formula > > who strengthens flame-retardant PBT, it comprises PBT, assisted plastic, fire retardant, weighting agent, antistatic and heat-resistant agent, described assisted plastic is POE plastics, fire retardant is Tritolyl Phosphate, antimonous oxide, weighting agent is calcium carbonate, silicon-dioxide, static inhibitor is single stearic acid glycerine lipoprotein, and heat-resistant agent is glass fibre.Wherein said PBT accounts for 50%-60%, and POE plastics account for 2%-2.5%, and Tritolyl Phosphate accounts for 7%-8%, and antimonous oxide accounts for 2%-3%, and calcium carbonate accounts for 0.5%-1.5%, and silicon-dioxide accounts for 1.5%-2%, and single stearic acid glycerine lipoprotein accounts for 2%-3%, and glass fibre accounts for 25%-30%.The enhancing flame-retardant PBT that this formula makes has the effect fire-retardant, high temperature resistant, antistatic, toughness is high.
For solving the problem of above-mentioned floating fibre, Chinese invention patent application CN 102924884 A disclose a kind of PBT matrix material and preparation method thereof, it comprises 100 parts of PBT, fire retardant 20-30 part, anti-dripping agent 0.1-0.5 part, toughner 10-20 part, static inhibitor 10-20 part, tackifier 1-5 part, ethyl acetate 0.2-5 part by weight.This patent has been avoided floating fine phenomenon, and has flame retardant resistance, but is non-enhancement type product.
In sum, in prior art, also there is no a kind of PBT matrix material that has low floating fibre, fire-retardant and enhancement concurrently.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of preparation method of low floating fine flame-retardant enhanced PBT material, make it have low floating fibre, flame retardant resistance and enhancement concurrently.
Technical scheme of the present invention is: a kind of preparation method of low floating fine flame-retardant enhanced PBT material, it comprises the steps: first raw material to be used homogenizer stirring and evenly mixing, then proceed in twin screw extruder and melt extrude, cooling, last injection moulding makes product; Described raw material is comprised of the component of following mass percent: PBT accounts for 55%～70%, and toughner accounts for 5～15%, and chopped glass fiber accounts for 10%-20%, and fire retardant accounts for 10～15%, and floating fine remover accounts for 0.3%～0.8%, and silane coupling agent, oxidation inhibitor and lubricant are surplus.
Optimize, described toughner adopts containing the hard section of PBT crystallization, soft polyester segment type.
Optimize, described toughner adopts thermoplastic polyester elastomer.
Optimize, described environmental protection fire retarding agent adopts TDE and/or antimonous oxide.
Optimize, described lubricant adopts the mixture of fatty acid ester and ethylene bis stearamide, and both part by weight are 1-2:1.
Optimize, described floating fine remover adopts TAF.
Optimize, raw material stirs 5-10min in homogenizer.
Optimize, while extruding, the barrel temperature of twin screw extruder is: back segment 230-240 ℃, stage casing 240-250 ℃, leading portion 250-255 ℃, head temperature 255-260 ℃.
Beneficial effect of the present invention is:
1, the present invention adopts containing the hard section of PBT crystallization, soft polyester segment type toughner, effectively reduces the degree of crystallinity of material, has reduced the post shrinkage phenomenon of material, has significantly reduced the surface floating fiber of material.And further adopt two kinds of different types of lubricants and floating fine remover compounded technology, and reached further effectively reduction product surface floating fine, make material surface smooth, make product provided by the invention have low floating fibre, flame retardant resistance and enhancement concurrently.
2, material of the present invention preferably resolves that this shaped material outward appearance of existing market is coarse can only, for the defect of inner part, have market outlook widely.
3, the present invention adopts halogen-free flame retardants, is the non-toxic, environmental friendly PBT resin with flame retardant resistance.
Embodiment
Below in conjunction with embodiment, further illustrate the present invention.
The technical scheme of present embodiment is: a kind of preparation method of low floating fine flame-retardant enhanced PBT material, it comprises the steps: first raw material to be used homogenizer stirring and evenly mixing, then proceed in twin screw extruder and melt extrude, cooling, last injection moulding makes product; Described raw material is comprised of the component of following mass percent: PBT accounts for 55%～70%, and toughner accounts for 5～15%, and chopped glass fiber accounts for 10%-20%, and fire retardant accounts for 10～15%, and floating fine remover accounts for 0.3%～0.8%, and silane coupling agent, oxidation inhibitor and lubricant are surplus.
Wherein, described toughner adopts containing the hard section of PBT crystallization, soft polyester segment type.
Wherein, described toughner adopts thermoplastic polyester elastomer.
Wherein, described environmental protection fire retarding agent adopts TDE and/or antimonous oxide.
Wherein, described lubricant adopts the mixture of fatty acid ester and ethylene bis stearamide, and both part by weight are 1-2:1.
Wherein, described floating fine remover adopts TAF.
Wherein, raw material stirs 5-10min in homogenizer.
Wherein, while extruding, the barrel temperature of twin screw extruder is: back segment 230-240 ℃, stage casing 240-250 ℃, leading portion 250-255 ℃, head temperature 255-260 ℃.
For further illustrating the present invention, present embodiment provides three samples, is respectively sample 1-3, and its component and weight percentage are as shown in table 1.
Table 1
Above-mentioned three sample product smooth surfaces are smooth, without being obviously floating fine, therefore the invention solves the floating fine phenomenon of such product surface.
The feature of present embodiment is:
1, present embodiment adopts containing the hard section of PBT crystallization, soft polyester segment type toughner, effectively reduces the degree of crystallinity of material, has reduced the post shrinkage phenomenon of material, has significantly reduced the surface floating fiber of material.And further adopt two kinds of different types of lubricants and floating fine remover compounded technology, and reached further effectively reduction product surface floating fine, make material surface smooth, make the product that present embodiment provides have low floating fibre, flame retardant resistance and enhancement concurrently.
2, present embodiment material preferably resolves that this shaped material outward appearance of existing market is coarse can only, for the defect of inner part, have market outlook widely.
3, present embodiment adopts halogen-free flame retardants, is the non-toxic, environmental friendly PBT resin with flame retardant resistance.
Claims (8)
1. a preparation method for low floating fine flame-retardant enhanced PBT material, is characterized in that: it comprises the steps: first raw material to be used homogenizer stirring and evenly mixing, then proceeds in twin screw extruder and melt extrudes, cooling, and last injection moulding makes product; Described raw material is comprised of the component of following mass percent: PBT accounts for 55%～70%, and toughner accounts for 5～15%, and chopped glass fiber accounts for 10%-20%, and fire retardant accounts for 10～15%, and floating fine remover accounts for 0.3%～0.8%, and silane coupling agent, oxidation inhibitor and lubricant are surplus.
2. the preparation method of low floating fine flame-retardant enhanced PBT material according to claim 1, is characterized in that: described toughner adopts containing the hard section of PBT crystallization, soft polyester segment type.
3. the preparation method of low floating fine flame-retardant enhanced PBT material according to claim 2, is characterized in that: described toughner adopts thermoplastic polyester elastomer.
4. the preparation method of low floating fine flame-retardant enhanced PBT material according to claim 3, is characterized in that: described environmental protection fire retarding agent adopts TDE and/or antimonous oxide.
5. the preparation method of low floating fine flame-retardant enhanced PBT material according to claim 4, is characterized in that: described lubricant adopts the mixture of fatty acid ester and ethylene bis stearamide, and both part by weight are 1-2:1.
6. the preparation method of low floating fine flame-retardant enhanced PBT material according to claim 5, is characterized in that: described floating fine remover adopts TAF.
7. the preparation method of low floating fine flame-retardant enhanced PBT material according to claim 6, is characterized in that: raw material stirs 5-10min in homogenizer.
8. according to the preparation method of the low floating fine flame-retardant enhanced PBT material described in claim 1-7 any one, it is characterized in that: while extruding, the barrel temperature of twin screw extruder is: back segment 230-240 ℃, stage casing 240-250 ℃, leading portion 250-255 ℃, head temperature 255-260 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310657840.0A CN103665793A (en) | 2013-12-09 | 2013-12-09 | Preparation method for low-floating-fiber flame-retardant reinforced PBT material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310657840.0A CN103665793A (en) | 2013-12-09 | 2013-12-09 | Preparation method for low-floating-fiber flame-retardant reinforced PBT material |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106084685A (en) * | 2016-08-12 | 2016-11-09 | 太仓市华鼎塑料有限公司 | A kind of low floating fine high fire-retardance PBT material and preparation method thereof |
| CN111098474A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Self-falling anti-sticking plate extrusion die and application thereof |
-
2013
- 2013-12-09 CN CN201310657840.0A patent/CN103665793A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106084685A (en) * | 2016-08-12 | 2016-11-09 | 太仓市华鼎塑料有限公司 | A kind of low floating fine high fire-retardance PBT material and preparation method thereof |
| CN111098474A (en) * | 2018-10-25 | 2020-05-05 | 中国石油化工股份有限公司 | Self-falling anti-sticking plate extrusion die and application thereof |
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