CN109776953A - A kind of low-k extrusion grade polypropylene reinforcement and preparation method and extrusion molding process - Google Patents
A kind of low-k extrusion grade polypropylene reinforcement and preparation method and extrusion molding process Download PDFInfo
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- CN109776953A CN109776953A CN201811545261.6A CN201811545261A CN109776953A CN 109776953 A CN109776953 A CN 109776953A CN 201811545261 A CN201811545261 A CN 201811545261A CN 109776953 A CN109776953 A CN 109776953A
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Abstract
The present invention discloses a kind of low-k extrusion grade polypropylene reinforcement and preparation method and extrusion molding process, the material are prepared by weight by following components: 50-80 parts of polypropylene, 10-30 parts of glass fibres, 2-10 parts of glass microballoons, 2-6 parts of compatilizers, 2-8 parts of toughener, 0.5-2 parts of silica, 0.5-1.5 parts of lubricants, 0.4-1.0 parts of antioxidant, 0.2-0.6 parts of light stabilizers.The present invention in formula system by adding solid glass micro-bead, glass fibre, silica composition, it is obviously improved the outer lubricant effect of system and the buckling deformation phenomenon of glass fiber reinforced materials, the polypropylene material dielectric constant that the present invention is prepared has excellent weather resistance and thermo oxidative aging performance down to 2.4.The present invention also provides a kind of extrusion molding processes of polypropylene reinforcement, are conducive to material shaping, weaken the buckling deformation phenomenon of glass fiber reinforced materials.
Description
Technical field
The invention belongs to technical field of polymer materials, specifically a kind of low-k extrusion grade polypropylene reinforcement
And preparation method and extrusion molding process.
Background technique
Dielectric materials, which are conducive to electromagnetic signal, preferably to be transmitted, thus scientific circles, our times various countries and industrial circle are all
The importance for recognizing 5G epoch Materials, being committed to research and development has high performance-price ratio, environmentally friendly, healthy low
Dielectric, low-loss enhance modified material.Low-k and low loss factors are the key points and difficulties of electromagnetic wave transparent material industry concern,
It is also higher and higher to the light-weighted attention degree of high wave-transmissivity materials with the arrival of 5G information age.And signal is transmitted and is closed
Most of products such as the antenna house of key not only need excellent mechanical strength in outdoor application, and need to have it is weather-proof,
The specific functions such as ageing-resistant, thus glass fiber reinforced plastics product is more used at that time.
In recent years in view of lightweight and the consideration of environmental protection, low dielectric thermoplastic composite is gradually developed, but current
Injection molding is mainly limited to for the molding mode of dielectric materials, this molding mode is for complicated antenna
Cover product tool has great advantage, but simple for some structures, larger-size antenna house product, because in view of intensity, molding
The factors such as efficiency also mainly use glass fiber reinforced plastics product at present, and such as current many communication base station antenna houses mostly use glass fiber reinforced plastics product,
Common injection moulded products are not able to satisfy its requirement, but there are the weights such as at high cost, heavy and non-environmental protection for glass fiber reinforced plastics product
Big disadvantage, EU countries is gradually substituted with other new materials at present, and China carries out also paying close attention to this respect skill over year
Art field progress, and a kind of low-k extrusion molding polypropylene reinforcement of this patent exploitation can just be substituted
It uses, and the moulding process of the material is studied in detail.
Summary of the invention
The purpose of the present invention is to provide a kind of low-k extrusion grade polypropylene reinforcements and preparation method thereof.
The purpose of the present invention can be achieved through the following technical solutions:
A kind of low-k extrusion grade polypropylene reinforcement is prepared by weight by following components:
Further scheme, the polypropylene melt flow rate are less than 5g/10min.
Further scheme, the glass fibre are E type glass fibre, and dielectric constant is tested under the conditions of 1MHz less than 3.8
Borosilicate system glass fibre, glass fiber diameter be 7-20 μm.
Further scheme, the glass microballoon are the solid glass micro-bead that partial size is 10-50 μm, titanium dioxide in glass microballoon
Silicon mass content is 56-60%, and boron oxide mass content is 12-15%, and calcium oxide mass content is 5-8%, magnesia quality
Content is 5-8%, and sodium oxide molybdena mass content is 10-13%.
Further scheme, compatilizer are PP grafted maleic anhydride or POE grafted maleic anhydride, and the grafting rate of maleic anhydride is
1.0-2.0%；
The toughener is one or more of POE, LDPE or HDPE compounding；
The lubricant be PE wax, ethylene bis-fatty acid amides, fatty acid amide by weight 2:1:1 compounding.
Further scheme, the dielectric constant of the silica are 2.2-2.4.
Further scheme, the antioxidant are Hinered phenols, phosphorous acid esters, thioester antioxidant by weight 1:1:
2 compounding.
Further scheme, the light stabilizer are hindered amines radical scavenger and photomask agent by weight 1:1's
Compounding.
Another goal of the invention of the invention is to provide the system of above-mentioned low-k extrusion grade polypropylene reinforcement
Preparation Method, comprising the following steps: according to the ratio, by polypropylene, glass microballoon, compatilizer, toughener, silica, lubricant, resist
Oxygen agent, light stabilizer are uniformly mixed, and are added in double screw extruder, glass fibre are added by side feed, through extruding pelletization
Obtain low-k extrusion grade polypropylene reinforcement.
Another goal of the invention of the invention is to provide squeezing for above-mentioned low-k extrusion grade polypropylene reinforcement
Moulding process out squeezes out gained low-k polypropylene reinforcement and cold through Vacuum shaping using single screw extrusion machine
But；The screw rod is controlled using three sections of warm areas, is followed successively by melting zone, melt delivery area, solid conveying zone, every section of warm area
Temperature is 170-220 DEG C, and the temperature of three sections of warm areas successively declines 5~10 DEG C；The mold temperature is divided into twoth area, temperature 160-
200℃。
Beneficial effects of the present invention:
(1) present invention provides a kind of formula system of low dielectric polypropylene reinforcement, and dielectric constant has down to 2.4
There are excellent weather resistance and thermo oxidative aging performance；
(2) present invention in formula system by adding solid glass micro-bead ingredient, hence it is evident that improves the outer lubrication effect of system
Fruit, and significantly improve the buckling deformation phenomenon of glass fiber reinforced materials；
(3) low dielectric polypropylene reinforcement prepared by the present invention, can carry out extrusion molding, and provide the extrusion of the material
Moulding process, melting zone of the material in barrel, melt delivery area, solid conveying zone, temperature gradually reduce, and melting zone temperature is high
When be conducive to material plasticizing, it is subsequent gradually reduced with temperature after be conducive to material shaping, weaken glass fiber reinforced materials warpage become
Shape phenomenon.
Specific embodiment
Present invention is further described in detail combined with specific embodiments below.
In following embodiment:
The polypropylene melt flow rate is less than 5g/10min.
The glass fibre is E type glass fibre, and borosilicate system of the dielectric constant less than 3.8 is tested under the conditions of 1MHz
Glass fibre, glass fiber diameter are 7-20 μm.
The glass microballoon is the solid glass micro-bead that partial size is 10-50 μm, silica quality content in glass microballoon
For 56-60%, boron oxide mass content is 12-15%, and calcium oxide mass content is 5-8%, and magnesia mass content is 5-
8%, sodium oxide molybdena mass content is 10-13%.
Compatilizer is PP grafted maleic anhydride or POE grafted maleic anhydride, and the grafting rate of maleic anhydride is 1.0-2.0%.
The toughener is one or more of POE, LDPE or HDPE compounding.
The lubricant be PE wax, ethylene bis-fatty acid amides, fatty acid amide by weight 2:1:1 compounding.
The dielectric constant of the silica is 2.2-2.4.
The antioxidant be Hinered phenols, phosphorous acid esters, thioester antioxidant by weight 1:1:2 compounding.
The light stabilizer be hindered amines radical scavenger with photomask agent compounding by weight 1:1.
Weather-proof test is executed by ISO4892-2 Cycle1 GB1766 standard；Dielectric constant is executed by GB12636 standard.
Preparation method preparation according to the invention implements 1~6, and preparation method is as follows, each Example formulations and extrusion
Moulding process is as shown in table 1:
(1) according to the ratio, polypropylene, glass microballoon, compatilizer, toughener, silica, lubricant, antioxidant, light is steady
Determine agent to be uniformly mixed, be added in double screw extruder, glass fibre is added by side feed, it is normal to obtain low dielectric through extruding pelletization
Number extrusion grade polypropylene reinforcement；
(2) it by gained low-k polypropylene reinforcement, is squeezed out using single screw extrusion machine and cold through Vacuum shaping
But, it is then cut according to scheduled length, product can be obtained；The screw rod is controlled using three sections of warm areas, is followed successively by melting
Area, melt delivery area, solid conveying zone, the temperature of every section of warm area are 170-220 DEG C, and every section of temperature control room is every 5-10 DEG C；Institute
It states mold temperature and is divided into twoth area, temperature is 160-200 DEG C.
Each Example formulations of table 1 and corresponding extrusion molding temperature
Table 2 respectively implements performance formula test result
By the elaboration to above embodiments, in view of joined specific E type glass fibre, appropriate titanium dioxide in the present invention
Silicon and glass microballoon ingredient reduce the dielectric constant of material, antioxidant and the comprehensive use of light stabilizer, it is excellent to impart material
Different weather resistance, product can be used as appearance member outdoor carry out using；Simultaneously because the addition of inorganic particulate glass microballoon is bright
The aobvious appearance for improving product floats fine state and buckling deformation situation, and the control for regional temperature each during extrusion molding
It is fixed to set up, and further improves product buckling deformation phenomenon.
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to case study on implementation, and described herein one
As principle be applied in other embodiments without having to go through creative labor.Therefore, the present invention is not limited to implementation cases here
Example, those skilled in the art's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be
Within protection scope of the present invention.
Claims (10)
1. a kind of low-k extrusion grade polypropylene reinforcement, it is characterised in that: prepared by weight by following components and
At:
50-80 parts of polypropylene
10-30 parts of glass fibre
2-10 parts of glass microballoon
2-6 parts of compatilizer
2-8 parts of toughener
0.5-2 parts of silica
0.5-1.5 parts of lubricant
0.4-1.0 parts of antioxidant
0.2-0.6 parts of light stabilizer.
2. low-k extrusion grade polypropylene reinforcement according to claim 1, it is characterised in that: the polypropylene
Melt flow rate (MFR) is less than 5g/10min.
3. low-k extrusion grade polypropylene reinforcement according to claim 1, it is characterised in that: the glass fibers
Dimension is E type glass fibre, and borosilicate system glass fibre of the dielectric constant less than 3.8, glass fibre are tested under the conditions of 1MHz
Diameter is 7-20 μm.
4. low-k extrusion grade polypropylene reinforcement according to claim 1, it is characterised in that: the glass is micro-
Pearl is the solid glass micro-bead that partial size is 10-50 μm, and silica quality content is 56-60%, boron oxide quality in glass microballoon
Content is 12-15%, and calcium oxide mass content is 5-8%, and magnesia mass content is 5-8%, and sodium oxide molybdena mass content is 10-
13%。
5. low-k extrusion grade polypropylene reinforcement according to claim 1, it is characterised in that: compatilizer PP
Grafted maleic anhydride or POE grafted maleic anhydride, the grafting rate of maleic anhydride are 1.0-2.0%；
The toughener is one or more of POE, LDPE or HDPE compounding；
The lubricant be PE wax, ethylene bis-fatty acid amides, fatty acid amide by weight 2:1:1 compounding.
6. low-k extrusion grade polypropylene reinforcement according to claim 1, it is characterised in that: the titanium dioxide
The dielectric constant of silicon is 2.2-2.4.
7. low-k extrusion grade polypropylene reinforcement according to claim 1, it is characterised in that: the antioxidant
For Hinered phenols, phosphorous acid esters, thioester antioxidant by weight 1:1:2 compounding.
8. low-k extrusion grade polypropylene reinforcement according to claim 1, it is characterised in that: the light is stablized
Agent be hindered amines radical scavenger with photomask agent compounding by weight 1:1.
9. special such as the preparation method of the described in any item low-k extrusion grade polypropylene reinforcements of claim 1-8
Sign is: the following steps are included: according to the ratio, by polypropylene, glass microballoon, compatilizer, toughener, silica, lubricant, resisting
Oxygen agent, light stabilizer are uniformly mixed, and are added in double screw extruder, glass fibre are added by side feed, through extruding pelletization
Obtain low-k extrusion grade polypropylene reinforcement.
10. the low-k extrusion grade polypropylene reinforcement that preparation method is prepared according to claim 9
Extrusion molding process, it is characterised in that: by gained low-k polypropylene reinforcement, squeezed out simultaneously using single screw extrusion machine
It is cooling through Vacuum shaping；The screw rod is controlled using three sections of warm areas, is followed successively by melting zone, melt delivery area, Solid Conveying and Melting
Area, the temperature of every section of warm area are 170-220 DEG C, and the temperature of three sections of warm areas successively declines 5 ~ 10 DEG C；The mold temperature is divided into two
Area, temperature are 160-200 DEG C.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111154188A (en) * | 2019-12-27 | 2020-05-15 | 会通新材料股份有限公司 | High-wave-transmittance polypropylene composite material and preparation method thereof |
| CN111978589A (en) * | 2020-08-27 | 2020-11-24 | 深圳市卓城科技有限公司 | Preparation method of wave-transmitting material and wave-transmitting material prepared by same |
| CN112500640A (en) * | 2020-12-03 | 2021-03-16 | 株洲时代工程塑料实业有限公司 | High-strength polypropylene composite material for 5G antenna housing and preparation method thereof |
| CN113337035A (en) * | 2020-10-31 | 2021-09-03 | 王永芳 | High-thermal-conductivity low-dielectric polypropylene continuous composite sheet composition and preparation method thereof |
| CN113831648A (en) * | 2021-11-08 | 2021-12-24 | 重庆会通科技有限公司 | Ultrahigh molecular weight polyethylene reinforced polypropylene composite material and preparation method thereof |
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| WO2017203467A1 (en) * | 2016-05-26 | 2017-11-30 | Sabic Global Technologies B.V. | Thermoplastic compositions for electronics or telecommunication applications and shaped article therefore |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111154188A (en) * | 2019-12-27 | 2020-05-15 | 会通新材料股份有限公司 | High-wave-transmittance polypropylene composite material and preparation method thereof |
| CN111978589A (en) * | 2020-08-27 | 2020-11-24 | 深圳市卓城科技有限公司 | Preparation method of wave-transmitting material and wave-transmitting material prepared by same |
| CN113337035A (en) * | 2020-10-31 | 2021-09-03 | 王永芳 | High-thermal-conductivity low-dielectric polypropylene continuous composite sheet composition and preparation method thereof |
| CN112500640A (en) * | 2020-12-03 | 2021-03-16 | 株洲时代工程塑料实业有限公司 | High-strength polypropylene composite material for 5G antenna housing and preparation method thereof |
| CN113831648A (en) * | 2021-11-08 | 2021-12-24 | 重庆会通科技有限公司 | Ultrahigh molecular weight polyethylene reinforced polypropylene composite material and preparation method thereof |
| CN113831648B (en) * | 2021-11-08 | 2023-08-04 | 重庆会通科技有限公司 | Ultra-high molecular weight polyethylene reinforced polypropylene composite material and preparation method thereof |
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