CN103601976A - Glass fiber reinforced polypropylene material for swimming pool staircase footplate and preparation method of glass fiber reinforced polypropylene material - Google Patents
Glass fiber reinforced polypropylene material for swimming pool staircase footplate and preparation method of glass fiber reinforced polypropylene material Download PDFInfo
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- CN103601976A CN103601976A CN201310610657.5A CN201310610657A CN103601976A CN 103601976 A CN103601976 A CN 103601976A CN 201310610657 A CN201310610657 A CN 201310610657A CN 103601976 A CN103601976 A CN 103601976A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
- B29B9/14—Making granules characterised by structure or composition fibre-reinforced
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- 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
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/58—Component parts, details or accessories; Auxiliary operations
- B29B7/72—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
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/74—Mixing; Kneading using other mixers or combinations of mixers, e.g. of dissimilar mixers ; Plant
- B29B7/7461—Combinations of dissimilar mixers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/80—Component parts, details or accessories; Auxiliary operations
- B29B7/88—Adding charges, i.e. additives
- B29B7/90—Fillers or reinforcements, e.g. fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/02—Making granules by dividing preformed material
- B29B9/06—Making granules by dividing preformed material in the form of filamentary material, e.g. combined with extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
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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
- B29C2948/00—Indexing scheme relating to extrusion moulding
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- C08L2205/00—Polymer mixtures characterised by other features
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Abstract
The invention discloses a glass fiber reinforced polypropylene material for a swimming pool staircase footplate. The glass fiber reinforced polypropylene material consists of the following raw materials in parts by weight: 50-80 parts of high-crystallinity homopolymerization polypropylene resin, 20-35 parts of alkali-free continuous long glass fibers, 3-8 parts of a compatilizer, 0-5 parts of a toughening agent, 0.1-1 part of a nucleating agent, 0.1-1 part of a lubricant, 0.1-1 part of an ultraviolet absorbent and 0.1-1 part of an antioxidant. The invention not only endows the glass fiber reinforced polypropylene material with relatively high tensile strength, flexural modulus and hardness, but also ensures that the glass fiber reinforced polypropylene material has the characteristics of good impact strength, small molding shrinkage ratio, difficulty in aging and the like; meanwhile, the glass fiber reinforced polypropylene material is high in heat deflection temperature, good in oxidation resistance under high-temperature conditions, low in cost and light in weight, and can replace a metal material for manufacturing the swimming pool staircase footplate.
Description
Technical field
The present invention relates to polymeric material field, relate in particular to the fiber glass reinforced polypropylene material that a kind of ladder of swimming pool pedal is used, the invention still further relates to the preparation method of this fiber glass reinforced polypropylene material.
Background technology
Polypropylene, owing to having good over-all properties, good chemical stability, good machine-shaping property and the relative cheap features such as price, is widely used in household electrical appliances and automobile-used field.Yet the polypropylene of non-modified exists tensile strength, modulus in flexure, hardness low, low-temperature impact-resistant intensity difference, molding shrinkage is large, and easily the shortcoming such as aging, has had a strong impact on polyacrylic use range.
Reinforced Polypropylene is polypropylene and glass fibre, the mixture of asbestos or mineral filler, the polypropylene material of homopolymer type and copolymer type has good resistance to water soak, antiacid caustic corrosion and resist dissolution, yet it is to aromatic hydrocarbon (as benzene) solvent, chlorinated hydrocarbon (as tetracol phenixin) solvent etc. does not have resistibility, and at high temperature oxidation-resistance is poor, simultaneously, existing Reinforced Polypropylene material can not well solve the tensile strength that polypropylene exists, modulus in flexure, hardness is low, low-temperature impact-resistant intensity difference, molding shrinkage is large, the easy shortcoming such as aging, and while replacing Reinforced Polypropylene for household electrical appliances and automobile-used field with ABS resin and PBT resin, product cost increases considerably.
Summary of the invention
The object of the invention is to propose the fiber glass reinforced polypropylene material that a kind of ladder of swimming pool pedal is used, this material has higher tensile strength, modulus in flexure, hardness, and its shock strength is good, molding shrinkage is little, be difficult for aging, meanwhile, the heat-drawn wire of this material is large, and under hot conditions, oxidation-resistance is good.
In order to solve prior art problem, the present invention is achieved through the following technical solutions:
The fiber glass reinforced polypropylene material that ladder of swimming pool pedal is used, is comprised of the following raw material of metering by weight:
50 ~ 80 parts of high crystallization homo-polypropylene resins
20 ~ 35 parts of alkali-free continuous long glass fibers
3 ~ 8 parts of compatilizers
0 ~ 5 part of toughner
0.1 ~ 1 part of nucleator
0.1 ~ 1 part of lubricant
0.1 ~ 1 part of UV light absorber
0.1 ~ 1 part, oxidation inhibitor;
Wherein, the melting index of described high crystallization homo-polypropylene is 40 ~ 55g/10min;
Described compatilizer is maleic anhydride inoculated polypropylene or acrylic acid-grafted polypropylene;
Described toughner is any one or several combination in POE, EVA, EPR, SEBS and SBS;
Described nucleator is any one or several combination in beta nucleater, nano level superfine talcum powder, Soduxin and phosphoric acid ester alkaline metal salt;
Described lubricant is any one or several combination in stearic acid, EBS, polyethylene wax, calcium stearate, Zinic stearas and silicone powder;
Described UV light absorber is any one or several combination of UV light absorber UV-234, UV light absorber UV-328 and ultraviolet absorbent UV-531;
Described antioxidant is any one or several combination in antioxidant 1010, irgasfos 168, oxidation inhibitor 1098, oxidation inhibitor 245 and antioxidant 1076.
Further, fiber glass reinforced polypropylene material of the present invention is preferably comprised of the following raw material of metering by weight:
65 ~ 75 parts of high crystallization homo-polypropylene resins
20 ~ 25 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
3 parts of toughner
0.1 ~ 1 part of nucleator
0.1 ~ 1 part of lubricant
0.1 ~ 1 part of UV light absorber
0.1 ~ 1 part, oxidation inhibitor.
The present invention also provides the preparation method of the fiber glass reinforced polypropylene material that a kind of ladder of swimming pool pedal uses, and the method comprises the following steps:
1) after toughner, compatilizer, lubricant, nucleator, UV light absorber and oxidation inhibitor are prepared by recipe ratio, pre-mixing 3min in low-speed mixer;
2) high crystallization homo-polypropylene is added in low-speed mixer, and in low-speed mixer with mixing of materials 3min after step 1), then material is fed into twin screw extruder from main feed system;
3) alkali-free continuous long glass fiber is added twin screw extruder from the fibre mouthful that adds of twin screw extruder;
4) by the material after step 3) by screw diameter be in 30 ~ 75mm, the length-to-diameter ratio twin screw extruder that is 36 ~ 40:1, carry out mixing, twin screw extruder temperature is: the firstth district is 120 ~ 135 ℃, Second Region ~ Si district is 180 ~ 185 ℃, Wu district ~ Jiu district is 185 ~ 195 ℃, head temperature is 200 ℃, by tie rod, pelletizing after water cooling, through vibratory screening apparatus, isolates particle simultaneously, mix rear packing, obtain the fiber glass reinforced polypropylene material that ladder of swimming pool pedal is used.
The present invention selects the high crystallization homo-polypropylene of high workability as resin base material, can reduce difficulty of processing, gives modulus in flexure and over-all properties that material is higher simultaneously.The interpolation of alkali-free continuous long glass fiber has further strengthened the modulus in flexure of material, has also improved tensile strength, thermotolerance and the dimensional stability of material simultaneously.
The compatilizer self that the present invention uses with response type group, can improve the consistency between glass fibre and acrylic resin, improve tensile strength, flexural strength and the surface smoothness of product.The interpolation of toughner can improve the socle girder notched Izod impact strength of fiber glass reinforced polypropylene on original basis, makes injection moulding product out be difficult for breaking.The interpolation of nucleator, can crystal grain thinning, improves crystallization rate, reaches to shorten shaping cycle, improve the physical and mechanical propertiess such as the goods transparency, surface luster, tensile strength, rigidity, heat-drawn wire, shock resistance, creep resistance.
In addition, the interpolation of lubricant of the present invention, UV light absorber and oxidation inhibitor, can further improve fiber glass reinforced polypropylene material processing characteristics, improve thermotolerance and the ageing resistance of product, reduce product and be subject to ultraviolet broken ring, keep the physicals of product.
When the present invention gives tensile strength that fiber glass reinforced polypropylene material is higher, modulus in flexure, hardness, also make it take into account that shock strength is good, molding shrinkage is little, be difficult for the features such as aging, simultaneously, the heat-drawn wire of this material is large, under hot conditions, oxidation-resistance is good, with low cost, lightweight, can replace metallic substance to be used for making ladder of swimming pool pedal.
Embodiment
The present invention has disclosed the fiber glass reinforced polypropylene material that a kind of ladder of swimming pool pedal is used, and the following raw material of metering by weight, consists of:
50 ~ 80 parts of high crystallization homo-polypropylene resins
20 ~ 35 parts of alkali-free continuous long glass fibers
3 ~ 8 parts of compatilizers
0 ~ 5 part of toughner
0.1 ~ 1 part of nucleator
0.1 ~ 1 part of lubricant
0.1 ~ 1 part of UV light absorber
0.1 ~ 1 part, oxidation inhibitor.
Wherein, the melting index of high crystallization homo-polypropylene is 40 ~ 55g/10min, and modulus in flexure is 1700 ~ 2200MPa, has high-crystallinity and high rigidity.The coupling agent modified processing of alkali-free continuous glass fibre process that the present invention is mentioned, and can be orientated after the mixing of high crystallization homo-polypropylene, and easily disperse, thereby tensile strength, modulus in flexure, thermotolerance and the dimensional stability etc. of raising material.
In order to improve the consistency of material, mentioned compatilizer is maleic anhydride inoculated polypropylene or acrylic acid-grafted polypropylene, this kind of compatilizer self band reactive pattern group, can improve the consistency between glass fibre and acrylic resin, improve tensile strength, flexural strength and the surface smoothness of product.
In order to improve the anti-stress cracking performance of material, in the present invention, added toughner, described toughner is any one or several combination in POE, EVA, EPR, SEBS and SBS, there is good toughness, flexibility and stress cracking resistance, can make the notched Izod impact strength of fiber glass reinforced polypropylene be improved.Described lubricant is any one or several combination in stearic acid, EBS, polyethylene wax, calcium stearate, Zinic stearas and silicone powder, can reduce the surfaceness of the fiber glass reinforced polypropylene of extruding, and improves the release property of moulding.
Nucleator of the present invention is any one or several combination in beta nucleater, nano level superfine talcum powder, Soduxin and phosphoric acid ester alkaline metal salt, can change the crystallization behavior of acrylic resin, accelerate crystallization rate, increase crystal density and impel fine grain size, reach physical and mechanical propertiess such as shortening shaping cycle, the raising goods transparency, surface luster, tensile strength, rigidity, heat-drawn wire, shock resistance, creep resistance.
In order further to improve the work-ing life of material and to delay the phenomenon that jaundice etc. occurs product, guarantee outward appearance and the ageing-resistant performance of product, in the present invention, also added UV light absorber and oxidation inhibitor, described UV light absorber is any one or several combination of UV light absorber UV-234, UV light absorber UV-328 and ultraviolet absorbent UV-531; Antioxidant is any one or several combination in antioxidant 1010, irgasfos 168, oxidation inhibitor 1098, oxidation inhibitor 245 and antioxidant 1076.
As a preferred embodiment of the present invention, this fiber glass reinforced polypropylene material is comprised of the following raw material of metering by weight:
65 ~ 75 parts of high crystallization homo-polypropylene resins
20 ~ 25 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
3 parts of toughner
0.1 ~ 1 part of nucleator
0.1 ~ 1 part of lubricant
0.1 ~ 1 part of UV light absorber
0.1 ~ 1 part, oxidation inhibitor.
The present invention also provides the preparation method of the fiber glass reinforced polypropylene material that a kind of ladder of swimming pool pedal uses, and the method comprises the following steps:
1) after toughner, compatilizer, lubricant, nucleator, UV light absorber and oxidation inhibitor are prepared by recipe ratio, pre-mixing 3min in low-speed mixer;
2) high crystallization homo-polypropylene is added in low-speed mixer, and in low-speed mixer with mixing of materials 3min after step 1), then material is fed into twin screw extruder from main feed system;
3) alkali-free continuous long glass fiber is added twin screw extruder from the fibre mouthful that adds of twin screw extruder;
4) by the material after step 3) by screw diameter be in 30 ~ 75mm, the length-to-diameter ratio twin screw extruder that is 36 ~ 40:1, carry out mixing, twin screw extruder temperature is: the firstth district is 120 ~ 135 ℃, Second Region ~ Si district is 180 ~ 185 ℃, Wu district ~ Jiu district is 185 ~ 195 ℃, head temperature is 200 ℃, by tie rod, pelletizing after water cooling, through vibratory screening apparatus, isolates particle simultaneously, mix rear packing, obtain the fiber glass reinforced polypropylene material that ladder of swimming pool pedal is used.
For those skilled in the art's understanding, below by specific embodiment, the present invention is done to further detailed description.
Embodiment 1
The fiber glass reinforced polypropylene material that the present embodiment ladder of swimming pool pedal is used is comprised of the following raw material of metering by weight:
77 parts of high crystallization homo-polypropylene resins
20 parts of alkali-free continuous long glass fibers
2 parts of compatilizers
0.3 part of nucleator
0.3 part of lubricant
0.1 part of UV light absorber
0.3 part, oxidation inhibitor.
Embodiment 2
The fiber glass reinforced polypropylene material that the present embodiment ladder of swimming pool pedal is used is comprised of the following raw material of metering by weight:
74 parts of high crystallization homo-polypropylene resins
20 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
0.3 part of nucleator
0.3 part of lubricant
0.1 part of UV light absorber
0.3 part, oxidation inhibitor.
Embodiment 3
The fiber glass reinforced polypropylene material that the present embodiment ladder of swimming pool pedal is used is comprised of the following raw material of metering by weight:
64 parts of high crystallization homo-polypropylene resins
30 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
0.3 part of nucleator
0.3 part of lubricant
0.1 part of UV light absorber
0.3 part, oxidation inhibitor.
Embodiment 4
The fiber glass reinforced polypropylene material that the present embodiment ladder of swimming pool pedal is used is comprised of the following raw material of metering by weight:
61 parts of high crystallization homo-polypropylene resins
30 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
3 parts of toughner
0.3 part of nucleator
0.3 part of lubricant
0.1 part of UV light absorber
0.3 part, oxidation inhibitor.
Comparative example 1
The fiber glass reinforced polypropylene material that the present embodiment ladder of swimming pool pedal is used is comprised of the following raw material of metering by weight:
74 parts of common homo-polypropylene resins
20 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
0.3 part of nucleator
0.3 part of lubricant
0.1 part of UV light absorber
0.3 part, oxidation inhibitor.
Comparative example 2
The fiber glass reinforced polypropylene material that the present embodiment ladder of swimming pool pedal is used is comprised of the following raw material of metering by weight:
64 parts of acrylic resins
30 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
0.3 part of nucleator
0.3 part of lubricant
0.1 part of UV light absorber
0.3 part, oxidation inhibitor.
Comparative example 3
The fiber glass reinforced polypropylene material that the present embodiment ladder of swimming pool pedal is used is comprised of the following raw material of metering by weight:
61 parts of acrylic resins
30 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
3 parts of toughner
0.3 part of nucleator
0.3 part of lubricant
0.1 part of UV light absorber
0.3 part, oxidation inhibitor.
The above-mentioned comparative example of mentioning 1 is to compare with reference to embodiment 2, and comparative example 2 is to compare with reference to embodiment 3, and comparative example 3 is to compare with reference to embodiment 4, and comparative example is to use different acrylic resins from the difference of embodiment.The fiber glass reinforced polypropylene material that the ladder of swimming pool pedal of embodiment 1 ~ 4 and comparative example 1 ~ 3 gained is used is all to adopt following methods to prepare, and the method comprises following concrete steps:
1) after toughner, compatilizer, lubricant, nucleator, UV light absorber and oxidation inhibitor are prepared by recipe ratio, pre-mixing 3min in low-speed mixer;
2) high crystallization homo-polypropylene is added in low-speed mixer, and in low-speed mixer with mixing of materials 3min after step 1), then material is fed into twin screw extruder from main feed system;
3) alkali-free continuous long glass fiber is added twin screw extruder from the fibre mouthful that adds of twin screw extruder;
4) by the material after step 3) by screw diameter be in 30 ~ 75mm, the length-to-diameter ratio twin screw extruder that is 36 ~ 40:1, carry out mixing, simultaneously by tie rod, pelletizing after water cooling, through vibratory screening apparatus, isolate particle, mix rear packing, obtain the fiber glass reinforced polypropylene material that ladder of swimming pool pedal is used.Wherein, the temperature in twin screw extruder granulation process Shi Ge district is as shown in table 1:
Table 1: the temperature in twin screw extruder granulation process Shi Ge district.
The performance of the fiber glass reinforced polypropylene material that the ladder of swimming pool pedal of embodiment 1 ~ 4 and comparative example 1 ~ 3 gained is used is tested, and adopt CG110E horizontal injection machine injection molding standard test specimen, molding technological condition: 160/165/175/180 ℃ of injection temperature (charging opening) (nozzle); Injection pressure 60MPa, dwell time 8s; Cooling time 8s.The testing method of properties is as follows:
Tensile strength and elongation at break: according to ASTM D-638 standard, test;
Flexural strength and modulus in flexure: according to ASTM D-790 standard, test;
Notch shock performance: test according to ASTM D-256 standard;
Molding shrinkage: test by GB/T 15585-1995 standard;
Melting index: test by ASTM D-1238 standard;
Ash content: test by GB/T9345.1-2008 standard, test result is as shown in table 2:
Table 2: the performance comparison table of the fiber glass reinforced polypropylene plastics of different homo-polypropylene.
As shown in Table 2, in contrast to and use common homo-polypropylene, use flexural strength, modulus and the tensile strength of the homo-polypropylene of high crystallization higher, notched Izod impact strength slightly reduces, and modulus in flexure increases by 800 ~ 1200MPa, and tensile strength increases 10MPa, melting index is high, is more conducive to injection moulding.
The tensile strength of the fiber glass reinforced polypropylene material that ladder of swimming pool pedal of the present invention is used improves 2 ~ 3 times than acrylic resin, and modulus in flexure improves 3 ~ 4 times, after adding toughner, shock strength improves 1 ~ 2 times, heat-drawn wire also significantly rises, and dimensional stability improves, and shrinking percentage reduces.In addition, the dimensional stability of product, resistance to deflection is good, can replace stainless steel metal material to apply in the use material of the building fields such as ladder of swimming pool pedal.
According to the elaboration in above specification sheets, those skilled in the art in the invention can also carry out suitable change and modification to above-mentioned embodiment.Therefore, the content of mentioning in above-described embodiment is not limitation of the invention, is not departing under the prerequisite of inventive concept of the present invention, and any apparent replacement is all within protection scope of the present invention.
Claims (3)
1. the fiber glass reinforced polypropylene material that ladder of swimming pool pedal is used, is comprised of the following raw material of metering by weight:
50 ~ 80 parts of high crystallization homo-polypropylene resins
20 ~ 35 parts of alkali-free continuous long glass fibers
3 ~ 8 parts of compatilizers
0 ~ 5 part of toughner
0.1 ~ 1 part of nucleator
0.1 ~ 1 part of lubricant
0.1 ~ 1 part of UV light absorber
0.1 ~ 1 part, oxidation inhibitor;
Wherein, the melting index of described high crystallization homo-polypropylene is 40 ~ 55g/10min;
Described compatilizer is maleic anhydride inoculated polypropylene or acrylic acid-grafted polypropylene;
Described toughner is any one or several combination in POE, EVA, EPR, SEBS and SBS;
Described nucleator is any one or several combination in beta nucleater, nano level superfine talcum powder, Soduxin and phosphoric acid ester alkaline metal salt;
Described lubricant is any one or several combination in stearic acid, EBS, polyethylene wax, calcium stearate, Zinic stearas and silicone powder;
Described UV light absorber is any one or several combination of UV light absorber UV-234, UV light absorber UV-328 and ultraviolet absorbent UV-531;
Described antioxidant is any one or several combination in antioxidant 1010, irgasfos 168, oxidation inhibitor 1098, oxidation inhibitor 245 and antioxidant 1076.
2. the fiber glass reinforced polypropylene material that ladder of swimming pool pedal according to claim 1 is used, is characterized in that: this fiber glass reinforced polypropylene material is comprised of the following raw material of metering by weight:
65 ~ 75 parts of high crystallization homo-polypropylene resins
20 ~ 25 parts of alkali-free continuous long glass fibers
5 parts of compatilizers
3 parts of toughner
0.1 ~ 1 part of nucleator
0.1 ~ 1 part of lubricant
0.1 ~ 1 part of UV light absorber
0.1 ~ 1 part, oxidation inhibitor.
3. a preparation method for the fiber glass reinforced polypropylene material that ladder of swimming pool pedal according to claim 1 and 2 is used, the method comprises the following steps:
1) after toughner, compatilizer, lubricant, nucleator, UV light absorber and oxidation inhibitor are prepared by recipe ratio, pre-mixing 3min in low-speed mixer;
2) high crystallization homo-polypropylene is added in low-speed mixer, and in low-speed mixer with mixing of materials 3min after step 1), then material is fed into twin screw extruder from main feed system;
3) alkali-free continuous long glass fiber is added twin screw extruder from the fibre mouthful that adds of twin screw extruder;
4) by the material after step 3) by screw diameter be in 30 ~ 75mm, the length-to-diameter ratio twin screw extruder that is 36 ~ 40:1, carry out mixing, twin screw extruder temperature is: the firstth district is 120 ~ 135 ℃, Second Region ~ Si district is 180 ~ 185 ℃, Wu district ~ Jiu district is 185 ~ 195 ℃, head temperature is 200 ℃, by tie rod, pelletizing after water cooling, through vibratory screening apparatus, isolates particle simultaneously, mix rear packing, obtain the fiber glass reinforced polypropylene material that ladder of swimming pool pedal is used.
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