CN101058666A - Unsaturated polyester sheet moulding material and preparation method thereof - Google Patents
Unsaturated polyester sheet moulding material and preparation method thereof Download PDFInfo
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- CN101058666A CN101058666A CN 200710049199 CN200710049199A CN101058666A CN 101058666 A CN101058666 A CN 101058666A CN 200710049199 CN200710049199 CN 200710049199 CN 200710049199 A CN200710049199 A CN 200710049199A CN 101058666 A CN101058666 A CN 101058666A
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Abstract
The invention discloses an unsaturated polyester sheet-like film plastic with high-glass fiber content and strength as well as making method, which comprises the following parts: 25-30% insaturated resin and low-contraction additive, 40-60% filler, 0. 36-0. 45% initiator, 1. 6-2. 2% internal demoulding agent, 75-100% zero-twist glass fiber yarn, 0. 4-0. 5% thickener. The making method comprises the following steps: making resin paste; steeping press; ripening; thickening; sealing; packing.
Description
Technical field
The present invention relates to a kind of synthetic plastics, relate generally to a kind of unsaturated polyester sheet molding compound and preparation method thereof.
Background technology
In the prior art, unsaturated polyester sheet molding compound (SMC) is the mixture that a kind of resin, glass, auxiliary agent form through certain technology.Be mainly used in fields such as automobile, railway, electric, insulation, civilian, building, use extensively., excellent performance little owing to proportion, moulding make things convenient for soon, at industrial circle by large-scale popularization.The domestic market also concentrates on these industries to the use of unsaturated polyester sheet molding compound at present, but as glass fiber reinforced plastics composite material, development both at home and abroad differs decades, the technical difference of slave unit also is self-evident, recently on products such as several special industries such as automobile exterior panel, collision bumper, skimobile shell, hopper car top cover, electric cutting machine baffle plate.Enterprise has made high glass fiber content, high-intensity requirement to unsaturated polyester sheet molding compound, and it is domestic to the progressively increase of high glass fiber content, high-intensity unsaturated polyester sheet molding compound (HMC) annual consumption, at present main dependence on import, the general data of high glass fiber content, high-intensity unsaturated polyester sheet molding compound is as follows:
So high glass fiber content all brings a difficult problem for production, technology, prescription even equipment, how to develop the HMC product and go to strive for this piece market Here it is our problem that will solve.
Summary of the invention
The objective of the invention is to overcome above-mentioned technological deficiency, a kind of high glass fiber content, high-intensity unsaturated polyester sheet molding compound and preparation method thereof are provided.Product performance of the present invention are superior, and physical strength height, shrinking percentage are low, and life-time service is indeformable, and the scope of application is extensive, economic worth is high.
For achieving the above object, the technical solution used in the present invention is:
Unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
25～30 parts of low shrinkage additives of unsaturated polyester: 5～10 parts
Filler: 40～60 parts of initiators: 0.36～0.45 part
Inner pattern releasing agent applicable: 1.6～2.2 parts of non-twist glass yarns: 75～100 parts
Thickening material: 0.4～0.5 part.
Described unsaturated polyester is viscosity: 13P～16P; Acid number: 14～20; Amount of solid: 63%～67%; Gel time: 65～120 seconds.
Described low shrinkage additive is polystyrene and Vinyl Acetate Copolymer thermoplastic resin.
Described filler is whiting and aluminium hydroxide.
Described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.
Remover is a Zinic stearas in described.
Described non-twist glass yarn is meant the alkali-free roving.
Described thickening material is a powdery magnesium oxide.
The preparation method of unsaturated polyester sheet molding compound is characterized in that: comprise that the preparation-compregnate-slaking thickening of resin paste-pack makes, its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, drop into earlier unsaturated polyester, liquid state and mix by the low shrinkage additive that initiator, polystyrene and Vinyl Acetate Copolymer thermoplastic resin that peroxidized t-butyl perbenzoate that mixes to obtain at 1: 1 and tert-butyl hydroperoxide cyclohexane constitute mix formation, drop into 1.6～2.2 parts of inner pattern releasing agent applicable Zinic stearass, whiting again and mix 40～60 parts of the fillers that form with aluminium hydroxide, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 150P～300P;
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.4～0.5 part of magnesium oxide thickening material, in high speed dispersor, disperseed 3～5 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon between the PE film that scribbles resin paste up and down by the glass fibre that length 23-27 millimeter is sheared again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.6～0.8mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 24～72 hours curing times, curing temperature is 40 ℃～45 ℃, and penetration degree is 30～60;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
The invention has the advantages that:
1, adopt the physical strength of the unsaturated polyester sheet molding compound that the present invention produces obviously to improve, shock strength can reach 170KJ/m
2～300KJ/m
2, improve 120%～200% than usual production; The shrinking percentage of unsaturated polyester sheet molding compound obviously reduces in addition, reaches zero contractive effect, has fully satisfied domestic and international requirement to A level surfacing.
2, because higher content of glass fiber, the thermal expansion of corresponding plastics and the scope of cold contraction have reduced, therefore improved the dimensional stability of matrix material, the raising of physical strength, planeness simultaneously makes product have in fields such as automobiles widely and uses.
Embodiment
Embodiment 1:
Unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
25 parts of low shrinkage additives of unsaturated polyester: 5 parts
Filler: 40 parts of initiators: 0.36 part
Inner pattern releasing agent applicable: 1.6 parts of non-twist glass yarns: 75 parts
Thickening material: 0.4 part.
Described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.Described filler is the mixture of whiting and aluminium hydroxide.Described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.Described non-twist glass yarn is meant the alkali-free roving.
The preparation method of unsaturated polyester sheet molding compound is characterized in that: comprise that the preparation-compregnate-slaking thickening of resin paste-pack makes, its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, drop into earlier 25 parts of unsaturated polyesters, liquid state and mix for 5 parts by the low shrinkage additive that 0.36 part of initiator, polystyrene and Vinyl Acetate Copolymer thermoplastic resin that peroxidized t-butyl perbenzoate that mixes to obtain at 1: 1 and tert-butyl hydroperoxide cyclohexane constitute mix formation, drop into 1.6 parts of inner pattern releasing agent applicable Zinic stearass, whiting again and mix 40 parts of the fillers that form with aluminium hydroxide, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 150P; Not enough as resin viscosity, available Bi Ke auxiliary agent B YK-9010 adjusts its viscosity.
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.4 part of magnesium oxide thickening material, in high speed dispersor, disperseed 4 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon by the glass fibre of 23 millimeters shearings of length between the PE film that scribbles resin paste up and down again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.6mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 24 hours curing times, curing temperature is 40 ℃, and penetration degree is 30;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
Embodiment 2:
Unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
30 parts of low shrinkage additives of unsaturated polyester: 10 parts
Filler: 60 parts of initiators: 0.45 part
Inner pattern releasing agent applicable: 2.2 parts of non-twist glass yarns: 100 parts
Thickening material: 0.5 part.
Described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.Described filler is the mixture of whiting and aluminium hydroxide.Described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.Described non-twist glass yarn is meant the alkali-free roving.
The preparation method of unsaturated polyester sheet molding compound is characterized in that: comprise that the preparation-compregnate-slaking thickening of resin paste-pack makes, its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, drop into earlier 30 parts of unsaturated polyesters, liquid state and mix for 10 parts by the low shrinkage additive that 0.45 part of initiator, polystyrene and Vinyl Acetate Copolymer thermoplastic resin that peroxidized t-butyl perbenzoate that mixes to obtain at 1: 1 and tert-butyl hydroperoxide cyclohexane constitute mix formation, drop into 2.2 parts of inner pattern releasing agent applicable Zinic stearass, whiting again and mix 60 parts of the fillers that form with aluminium hydroxide, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 300P; Not enough as resin viscosity, available Bi Ke auxiliary agent B YK-9010 adjusts its viscosity.
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.5 part of magnesium oxide thickening material, in high speed dispersor, disperseed 5 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon by the glass fibre of 27 millimeters shearings of length between the PE film that scribbles resin paste up and down again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.8mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 72 hours curing times, curing temperature is 45 ℃, and penetration degree is 40;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
Embodiment 3:
Unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
26 parts of low shrinkage additives of unsaturated polyester: 7 parts
Filler: 50 parts of initiators: 0.4 part
Inner pattern releasing agent applicable: 2 parts of non-twist glass yarns: 80 parts
Thickening material: 0.45 part.
Described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.Described filler is the mixture of whiting and aluminium hydroxide.Described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.Described non-twist glass yarn is meant the alkali-free roving.
The preparation method of unsaturated polyester sheet molding compound is characterized in that: comprise that the preparation-compregnate-slaking thickening of resin paste-pack makes, its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, drop into earlier 26 parts of unsaturated polyesters, liquid state and mix for 7 parts by the low shrinkage additive that 0.4 part of initiator, polystyrene and Vinyl Acetate Copolymer thermoplastic resin that peroxidized t-butyl perbenzoate that mixes to obtain at 1: 1 and tert-butyl hydroperoxide cyclohexane constitute mix formation, drop into 2 parts of inner pattern releasing agent applicable Zinic stearass, whiting again and mix 50 parts of the fillers that form with aluminium hydroxide, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 200P; Not enough as the resin paste viscosity, available Bi Ke auxiliary agent B YK-9010 adjusts its viscosity.
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.45 part of magnesium oxide thickening material, in high speed dispersor, disperseed 3 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon by the glass fibre of 25 millimeters shearings of length between the PE film that scribbles resin paste up and down again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.7mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 36 hours curing times, curing temperature is 42 ℃, and penetration degree is 50;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
Embodiment 4:
Unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
28 parts of low shrinkage additives of unsaturated polyester: 9 parts
Filler: 55 parts of initiators: 0.42 part
Inner pattern releasing agent applicable: 2.1 parts of non-twist glass yarns: 90 parts
Thickening material: 0.48 part.
Described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.Described filler is the mixture of whiting and aluminium hydroxide.Described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.Described non-twist glass yarn is meant the alkali-free roving.
The preparation method of unsaturated polyester sheet molding compound comprises that the preparation-compregnate-slaking thickening of resin paste-pack makes, and its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, drop into earlier 28 parts of unsaturated polyesters, liquid state and mix for 9 parts by the low shrinkage additive that 0.42 part of initiator, polystyrene and Vinyl Acetate Copolymer thermoplastic resin that peroxidized t-butyl perbenzoate that mixes to obtain at 1: 1 and tert-butyl hydroperoxide cyclohexane constitute mix formation, drop into 2.1 parts of inner pattern releasing agent applicable Zinic stearass, whiting again and mix 55 parts of the fillers that form with aluminium hydroxide, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 250P; Not enough as the resin paste viscosity, available Bi Ke auxiliary agent B YK-9010 adjusts its viscosity.
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.48 part of magnesium oxide thickening material, in high speed dispersor, disperseed 5 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon by the glass fibre of 26 millimeters shearings of length between the PE film that scribbles resin paste up and down again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.7mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 70 hours curing times, curing temperature is 45 ℃, and penetration degree is 60;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
Embodiment 5:
Unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
30 parts of low shrinkage additives of unsaturated polyester: 5 parts
Filler: 60 parts of initiators: 0.36 part
Inner pattern releasing agent applicable: 2.2 parts of non-twist glass yarns: 75 parts
Thickening material: 0.5 part.
Described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.Described filler is the mixture of whiting and aluminium hydroxide.Described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.Described non-twist glass yarn is meant the alkali-free roving.
The preparation method of unsaturated polyester sheet molding compound comprises that the preparation-compregnate-slaking thickening of resin paste-pack makes, and its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, drop into earlier 30 parts of unsaturated polyesters, liquid state and mix for 5 parts by the low shrinkage additive that 0.36 part of initiator, polystyrene and Vinyl Acetate Copolymer thermoplastic resin that peroxidized t-butyl perbenzoate that mixes to obtain at 1: 1 and tert-butyl hydroperoxide cyclohexane constitute mix formation, drop into 2.2 parts of inner pattern releasing agent applicable Zinic stearass, whiting again and mix 60 parts of the fillers that form with aluminium hydroxide, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 150P; If the resin paste viscosity is not enough, available Bi Ke auxiliary agent B YK-9010 adjusts its viscosity;
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.5 part of magnesium oxide thickening material, in high speed dispersor, disperseed 3 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon by the glass fibre of 23 millimeters shearings of length between the PE film that scribbles resin paste up and down again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.8mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 72 hours curing times, curing temperature is 40 ℃, and penetration degree is 30;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
Embodiment 6:
Unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
25 parts of low shrinkage additives of unsaturated polyester: 10 parts
Filler: 40 parts of initiators: 0.45 part
Inner pattern releasing agent applicable: 1.6 parts of non-twist glass yarns: 100 parts
Thickening material: 0.4 part.
Described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.Described filler is the mixture of whiting and aluminium hydroxide.Described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.Described non-twist glass yarn is meant the alkali-free roving.
The preparation method of unsaturated polyester sheet molding compound comprises that the preparation-compregnate-slaking thickening of resin paste-pack makes, and its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, drop into earlier 25 parts of unsaturated polyesters, liquid state and mix for 10 parts by the low shrinkage additive that 0.45 part of initiator, polystyrene and Vinyl Acetate Copolymer thermoplastic resin that peroxidized t-butyl perbenzoate that mixes to obtain at 1: 1 and tert-butyl hydroperoxide cyclohexane constitute mix formation, drop into 1.6 parts of inner pattern releasing agent applicable Zinic stearass, whiting again and mix 40 parts of the fillers that form with aluminium hydroxide, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 300P; If the resin paste viscosity is not enough, available Bi Ke auxiliary agent B YK-9010 adjusts its viscosity;
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.4 part of magnesium oxide thickening material, in high speed dispersor, disperseed 5 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon by the glass fibre of 27 millimeters shearings of length between the PE film that scribbles resin paste up and down again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.6mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 24 hours curing times, curing temperature is 45 ℃, and penetration degree is 60;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
Claims (8)
1, unsaturated polyester sheet molding compound is characterized in that: the feed composition of described unsaturated polyester sheet molding compound comprises unsaturated polyester, low shrinkage additive, filler, initiator, interior remover, non-twist glass yarn, thickening material; Its weight part is:
25～30 parts of low shrinkage additives of unsaturated polyester: 5～10 parts
Filler: 40～60 parts of initiators: 0.36～0.45 part
Inner pattern releasing agent applicable: 1.6～2.2 parts of non-twist glass yarns: 75～100 parts
Thickening material: 0.4～0.5 part.
2, unsaturated polyester sheet molding compound according to claim 1 is characterized in that: described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.
3, unsaturated polyester sheet molding compound according to claim 1 is characterized in that: described filler is the mixture of whiting and aluminium hydroxide.
4, unsaturated polyester sheet molding compound according to claim 1 is characterized in that: described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.
5, the preparation method of unsaturated polyester sheet molding compound is characterized in that: comprise that the preparation-compregnate-slaking thickening of resin paste-pack makes, its concrete preparation process is as follows:
1. the preparation of resin paste: according to the prescription requirement, respectively each component metering is mixed, 25～30 parts of unsaturated polyesters of input, 0.36～0.45 part of initiator, low shrinkage additive mix for 5～10 parts earlier, drop into 1.6～2.2 parts of inner pattern releasing agent applicables, 40～60 parts of fillers again, dispersed with stirring evenly forms resin paste together; The resin paste viscosity is at 150P～300P;
2. compregnate: in the resin paste that mixes that 1. step obtains, add 0.4～0.5 part of thickening material, in high speed dispersor, disperseed 3～5 minutes, the high speed dispersor rotating speed is not less than 1000 rev/mins, add again in the blanking groove of compregnate unit, evenly be coated on the PE film of carrying up and down, to evenly be sprinkling upon between the PE film that scribbles resin paste up and down by the glass fibre that length 23-27 millimeter is sheared again, utilize the tractive force and the pressure of compregnate unit to make resin paste fully soak into glass, soaking good tablet harvest volume, this pressure process is 0.6～0.8mPa again;
3. slaking thickening: the tablet that winds is sealed and packed, places dry homothermic drying room to carry out slaking, and 24～72 hours curing times, curing temperature is 40 ℃～45 ℃, and penetration degree is 30～60;
4. pack: the tablet that slaking is good carries out outer packaging after being chilled to normal temperature.
6, unsaturated polyester sheet molding compound according to claim 5 is characterized in that: described low shrinkage additive is the mixture that polystyrene and Vinyl Acetate Copolymer thermoplastic resin form.
7, unsaturated polyester sheet molding compound according to claim 5 is characterized in that: described filler is the mixture of whiting and aluminium hydroxide.
8, unsaturated polyester sheet molding compound according to claim 5 is characterized in that: described initiator is a liquid state and by the peroxidized t-butyl perbenzoate and the tert-butyl hydroperoxide cyclohexane that mix obtain at 1: 1.
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| CN101927570A (en) * | 2010-05-11 | 2010-12-29 | 合肥华欣自控设备成套厂 | Method for preparing SMC composite material with high finish surface |
| CN102358799A (en) * | 2011-09-16 | 2012-02-22 | 无锡创达电子有限公司 | Unsaturated polyester molding compound and preparation method thereof |
| CN102358799B (en) * | 2011-09-16 | 2013-01-02 | 无锡创达电子有限公司 | Unsaturated polyester molding compound and preparation method thereof |
| CN102675847A (en) * | 2012-05-17 | 2012-09-19 | 镇江育达复合材料有限公司 | Zero-shrinkage internal-colorable BMC (bulk molding compounds) material, and preparation method and applications thereof |
| CN103102635B (en) * | 2013-02-20 | 2018-01-09 | 合肥杰事杰新材料股份有限公司 | A kind of efficient halogen-free anti-inflaming unsaturated polyester die plastic and preparation method thereof |
| CN103102635A (en) * | 2013-02-20 | 2013-05-15 | 合肥杰事杰新材料股份有限公司 | High efficiency halogen-free flame retardant unsaturated polyester molding material and preparation method thereof |
| CN103978614A (en) * | 2014-05-07 | 2014-08-13 | 福建海源新材料科技有限公司 | SMC compression molding process for interior and exterior corner templates of building |
| CN104017385A (en) * | 2014-05-30 | 2014-09-03 | 浙江长兴四达复合材料有限公司 | Resin composition, prepreg, composite plate, and preparation method and applications of the composite plate |
| CN104861689A (en) * | 2015-06-10 | 2015-08-26 | 无锡澳明威环保新材料有限公司 | Production method and formula of high-strength and high-toughness laminar film plastic |
| CN105061969A (en) * | 2015-08-07 | 2015-11-18 | 河北恒瑞复合材料有限公司 | Novel SMC (sheet molding compound) composite for railway cable grooves |
| CN105186410A (en) * | 2015-09-30 | 2015-12-23 | 宁波华缘玻璃钢电器制造有限公司 | Composite material cable trough box |
| CN105176130A (en) * | 2015-10-29 | 2015-12-23 | 山东日新复合材料有限公司 | Building formwork prepared from FRP waste and preparing method thereof |
| CN106368595A (en) * | 2016-08-30 | 2017-02-01 | 株洲时代新材料科技股份有限公司 | Ladder stand assembly used for T-shaped beam refuge platform |
| CN106380809A (en) * | 2016-08-31 | 2017-02-08 | 浙江尚美建材有限公司 | Aeronautical composite plate and processing method thereof |
| CN106700462A (en) * | 2017-01-19 | 2017-05-24 | 厦门弘诚复合材料有限公司 | Prepreg for preparing special transformer polyester insulating board, special transformer polyester insulating board and preparation method |
| CN106700462B (en) * | 2017-01-19 | 2021-07-30 | 厦门弘诚复合材料有限公司 | Prepreg for preparing special transformer polyester insulating board, special transformer polyester insulating board and preparation method |
| CN107418172A (en) * | 2017-06-17 | 2017-12-01 | 常州新区金利宝塑料制品有限公司 | A kind of sheet molding compound proprietary material |
| CN109859881A (en) * | 2017-11-30 | 2019-06-07 | 许继变压器有限公司 | Iron core reactor air-gap insulation material, iron core reactor air gap cushion block and iron core reactor |
| CN109859881B (en) * | 2017-11-30 | 2021-02-19 | 许继变压器有限公司 | Air gap insulating material for iron core reactor, air gap cushion block for iron core reactor and iron core reactor |
| CN107964228A (en) * | 2018-03-02 | 2018-04-27 | 宁波诺丁汉大学 | A kind of preparation process of transparent SMC moulding materials |
| CN114410095A (en) * | 2021-12-31 | 2022-04-29 | 江苏常阳科技有限公司 | Sheet molding compound for adsorbing and degrading formaldehyde and preparation method thereof |
| CN114410095B (en) * | 2021-12-31 | 2023-02-03 | 江苏常阳科技有限公司 | Sheet molding compound for adsorbing and degrading formaldehyde and preparation method thereof |
| CN114921076A (en) * | 2022-06-01 | 2022-08-19 | 深圳市万维博新能源技术有限公司 | SMC-H sheet formula applied to new energy and manufacturing process |
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