CN106589878A - Subsequent-orientated glass fiber reinforced corrosion-resistant sheet molding compound and preparation method therefor - Google Patents
Subsequent-orientated glass fiber reinforced corrosion-resistant sheet molding compound and preparation method therefor Download PDFInfo
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- CN106589878A CN106589878A CN201611191299.9A CN201611191299A CN106589878A CN 106589878 A CN106589878 A CN 106589878A CN 201611191299 A CN201611191299 A CN 201611191299A CN 106589878 A CN106589878 A CN 106589878A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/06—Unsaturated polyesters
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
- C08L63/10—Epoxy resins modified by unsaturated compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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Abstract
The invention relates to a subsequent-orientated glass fiber reinforced corrosion-resistant sheet molding compound and a preparation method therefor and belongs to the field of composite materials. The molding compound disclosed by the invention contains the following substances in parts by mass: 15-30 parts of unsaturated polyester resin, 2-15 parts of low shrinking agent, 1-5 parts of styrene, 15-50 parts of filler, 20-40 parts of glass fibers, 0.1-0.6 part of initiator, 0.005-0.05 part of polymerization inhibitor, 0.1-0.7 part of thickener, 0.5-1.5 parts of internal molding lubricant and 0.1-1.0 part of processing aid. Compared with the conventional sheet molding compounds, the subsequent-orientated glass fiber reinforced corrosion-resistant sheet molding compound has the advantages that subsequent-orientated glass fibers and part of chopped glass fibers are matched with each other so as to serve as a reinforcing material, meanwhile, the formula of the sheet molding compound is optimized, and thus, the chemical corrosion resistance of the sheet molding compound is improved remarkably compared with that of the conventional sheet molding compounds; and the preparation method for the subsequent-orientated glass fiber reinforced corrosion-resistant sheet molding compound is provided.
Description
Technical field
The present invention relates to a kind of moulding compound and preparation method thereof, strengthens resistance to more particularly, to a kind of continuously-directional glass fiber
Corrosion sheet molding compound and preparation method thereof, it belongs to field of compound material.
Background technology
Sheet molding compound technology originates from West Germany the sixties in last century, and it is with unsaturated polyester resin, shrinking agent
Resin, filler, glass fibre are main component, are aided with initiator, polymerization inhibitor, inner pattern releasing agent applicable, mill base, thickening agent etc. and prepare resin
Paste, and then the compound good dipping with glass that unit completes resin paste/glass fibre is produced by special sheet molding compound,
So as to obtain lamellar " sandwich " structure.Curing step of the structure through 24-96 hours at a certain temperature, you can obtain one
Plant solid-state tablet that is manually actuated and being cut according to wish and be put.The tablet is placed in specific knot
In the mold cavity of structure, it pressurized flow and can be full of mold cavity under high temperature, high pressure, and then crosslink curing reaction,
Solid molded product is finally obtained.
Sheet molding compound technology and its corresponding pressing have the advantage that：Product structure designability is strong, can one
Secondary molding has the product of complicated fine structure；Product high-strength light, surface can reach the brightness and flatness as metal；Can
Straight forming intrinsic color product and without the need for secondary spray painting；Ageing-resistant, corrosion resistance, excellent in flame retardance；Can be matched somebody with somebody as needed
Product of side's design to obtain possessing particular demands.Therefore, the technology track traffic, automobile, train part, electric equipment products,
The fields such as building materials are widely used.
Conventional sheet molding compound is strengthened merely using short glass fiber, therefore the intensity of correspondence product is especially impacted
Intensity is relatively low, it is difficult to use as the structural member for bearing Main Load.Meanwhile, sheet molding compound pressing it is above-mentioned
Advantage so as to there is also larger use demand under the working environment that there is resistance to chemical attack to require for part, such as：Chemical industry
Factory, STP etc..In these occasions, the load carrying capacity of material often for its life-time service safety with make
It is most important with the life-span, and the intensity of the enhanced sheet molding compound of pure short glass fiber of routine is difficult to satisfaction and uses needs.
Publication date is on 04 21st, 2010, in the Chinese patent of Publication No. CN101696320A, discloses a kind of name
A kind of referred to as patent of invention of " continuously-directional glass fiber reinforcement unsaturated polyester sheet molding compound ".It is continuous that the patent is provided
Though directional glass fiber reinforcement unsaturated polyester sheet molding compound using continuously-directional glass fiber strengthen, bias toward material into
The improvement of type technique takes into account with fire resistance, is not directed to the raising of material corrosion resistance.
The content of the invention
It is an object of the invention to overcome above-mentioned deficiency present in prior art, and providing one kind can retain continuously-directional
The basis of the good intensity of glass fiber reinforcement sheet molding compound, by preparation method produce rationally, corrosion resistance is than conventional
Sheet stock is significantly improved, the continuously-directional glass fiber of low cost, stay-in-grade sheet molding compound strengthens corrosion-resistant lamellar mould
Plastics and preparation method thereof.
The present invention the adopted technical scheme that solves the above problems is：The continuously-directional glass fiber strengthens corrosion-resistant lamellar
Moulding compound, it is characterised in that：Material of the formula of the moulding compound comprising following mass parts：Unsaturated polyester resin 15-30 parts,
Shrinking agent 2-15 parts, styrene 1-5 parts, filler 15-50 parts, glass fibre 20-40 parts, initiator 0.1-0.6 parts, polymerization inhibitor
0.005-0.05 parts, thickening agent 0.1-0.7 parts, inner pattern releasing agent applicable 0.5-1.5 parts, processing aid 0.1-1.0 parts.
Preferably, unsaturated polyester resin of the present invention is one or two of isophthalic resin or vinylite
Mixing.
Preferably, shrinking agent of the present invention is one or two of polystyrene or polymethyl methacrylate
Mixing.
Preferably, filler of the present invention is barium sulfate or kaolinic one or two mixing.
Preferably, glass fibre of the present invention is alkali-free continuous glass fibre and chopped length is the short of 12-30 mm
The mixture of fiber, mixed proportion is：1:6-6:1.
Preferably, initiator of the present invention is peroxidized t-butyl perbenzoate or tert-butyl peroxy propylene carbonate
One or two mixing.
Preferably, polymerization inhibitor of the present invention is 1,4-benzoquinone.
Preferably, thickening agent of the present invention is one or two mixture of magnesium oxide or magnesium hydroxide.
Preferably, inner pattern releasing agent applicable of the present invention is one or two mixture of zinc stearate or calcium stearate；
Processing aid is one or two the mixture of BYK996 or BYK972；Processing aid BYK996 or BYK972 are Germany
The mixture of Bi Ke chemical productions.
In order that sheet molding compound is presented different colors, various pigment pastes can be added in preparation process.
The present invention also provides a kind of continuously-directional glass fiber strengthens the preparation method of corrosion-resistant sheet molding compound, its feature
It is：Comprise the following steps：
A, by unsaturated polyester resin, shrinking agent, styrene, filler, initiator, polymerization inhibitor, inner pattern releasing agent applicable and processing aid
Deng weighing according to a certain percentage, carry out being thoroughly mixed obtaining resin paste；
B, thickening agent is mixed with vector resin, obtain thickening agent paste；
C, the on-line mixing system that resin paste and thickening agent paste produce unit by sheet molding compound simultaneously is mixed, then with continuously
After directional glass fiber and short glass fiber are compound, through dipping and compacting process sheet material is obtained；
D, sheet material is placed at a certain temperature ripening, after penetration hardness reaches certain limit, that is, obtain continuously-directional glass
The corrosion-resistant sheet molding compound of fiber reinforcement.
The present invention compared with prior art, with advantages below and effect：1st, because being coordinated using continuously-directional glass fiber
Part short glass fiber used as reinforcing material, compared and conventional all strengthened using short glass fiber by gained sheet molding compound
Sheet molding compound, be significantly increased in mechanical property；2nd, due to preparing the optimization of formula, gained sheet molding compound has good
Good resistance to chemical attack characteristic.Show as：Corresponding molding flat board soaks in the sulphuric acid or sodium hydroxide solution of 10wt% concentration
After 24 hours, surface without discoloration, cracking, peel off, the obvious cosmetic variation such as layering, glossiness decline.Material correspondence after before processing
Sample mechanical property retention rate more than 90%.Thus can preferably meet chemical plant, STP etc. and corrode sex work
To the corrosion-resistant needs of sheet molding compound pressing under environment.
Specific embodiment
Below by embodiment, the present invention is described in further detail, following examples be explanation of the invention and
The invention is not limited in following examples.
The present embodiment continuously-directional glass fiber strengthens the thing of the formula comprising following mass parts of corrosion-resistant sheet molding compound
Matter：Unsaturated polyester resin 15-30 parts, shrinking agent 2-15 parts, styrene 1-5 parts, filler 15-50 parts, glass fibre 20-40
Part, initiator 0.1-0.6 parts, polymerization inhibitor 0.005-0.05 parts, thickening agent 0.1-0.7 parts, inner pattern releasing agent applicable 0.5-1.5 parts, processing
Auxiliary agent 0.1-1.0 parts.
Unsaturated polyester resin in the present embodiment is one or two mixing of isophthalic resin or vinylite.
Shrinking agent in the present embodiment is polystyrene, one or two mixing of polymethyl methacrylate.
Filler in the present embodiment is barium sulfate, kaolinic one or two mixing.
Glass fibre in the present embodiment is that alkali-free continuous glass fibre is mixed with the chopped fiber of chopped length 12-30 mm
Compound, mixed proportion is：1:6-6:1.
It is peroxidized t-butyl perbenzoate that initiator in the present embodiment is initiator（TBPB）Or tert-butyl peroxy carbonic acid
Isopropyl ester（BIC-75）One or two mixing.
Polymerization inhibitor in the present embodiment is 1,4-benzoquinone.
Thickening agent in the present embodiment is one or two mixture of magnesium oxide or magnesium hydroxide.
Inner pattern releasing agent applicable in the present embodiment is one or two mixture of zinc stearate or calcium stearate；Processing aid
For one or two the mixture of the BYK996 or BYK972 of German Bi Ke chemical productions.
The present embodiment additionally provides continuously-directional glass fiber strengthens the preparation method of corrosion-resistant sheet molding compound, including with
Lower step：A, unsaturated polyester resin, shrinking agent, styrene, filler, initiator, polymerization inhibitor, inner pattern releasing agent applicable and processing are helped
Agent etc. is weighed according to a certain percentage, carries out being thoroughly mixed obtaining resin paste.
B, thickening agent is mixed with vector resin, obtain thickening agent paste.
C, the on-line mixing system mixing that resin paste and thickening agent paste are produced unit by sheet molding compound simultaneously, then with
Sheet material is obtained after continuously-directional glass fiber and short glass fiber are compound, through dipping and compacting process.
D, sheet material is placed at a certain temperature ripening, after penetration hardness reaches certain limit, that is, obtain continuously-directional
The corrosion-resistant sheet molding compound of glass fiber reinforcement.
Embodiment 1：
Prepare the kg of vinyl ester resin 30, the kg of polystyrene 8, the kg of styrene 3, the kg of Kaolin 35, the kg of glass fibre 25：
Continuously-directional fiber is 5 with 25mm chopped strands amount ratio:1, tert-butyl peroxy propylene carbonate（BIC-75）0.4 kg, to benzene
The kg of quinone powder 0.02, the kg of magnesium oxide powder 0.5, the kg of zinc stearate 1.7, the kg of BYK996 auxiliary agents 0.40, BYK972 auxiliary agents
0.40 kg。
Material etc. by more than in addition to thickening agent is pasted is weighed with certain proportion, is carried out being sufficiently mixed and is obtained resin paste, resin
Paste viscosity is about 100 P；The on-line mixing system that resin paste and thickening agent paste produce unit by sheet molding compound simultaneously is mixed
Close, then sheet material is obtained after being combined with continuously-directional glass fiber and short glass fiber, through dipping and compacting process；By sheet material
Ripening is placed at 40 DEG C, after penetration hardness reaches 350-450, that is, the corrosion-resistant sheet molding of continuously-directional fiber reinforcement is obtained
Material.
Embodiment 2：
Prepare the kg of vinyl ester resin 26, the kg of polymethyl methacrylate 12, the kg of styrene 4, the kg of barium sulfate 40, glass fibers
Tie up 23 kg：Continuously-directional fiber is 5 with 25mm chopped strands amount ratio:1, peroxidized t-butyl perbenzoate（TBPB）0.5 kg,
The kg of 1,4-benzoquinone powder 0.03, the kg of magnesium oxide powder 0.6, the kg of zinc stearate 1.8, the kg of BYK996 auxiliary agents 0.20, BYK972 is helped
The kg of agent 0.4.
Material etc. by more than in addition to thickening agent is pasted is weighed with certain proportion, is carried out being sufficiently mixed and is obtained resin paste, resin
Paste viscosity is about 100 P；The on-line mixing system that resin paste and thickening agent paste produce unit by sheet molding compound simultaneously is mixed
Close, then sheet material is obtained after being combined with continuously-directional glass fiber and short glass fiber, through dipping and compacting process；By sheet material
Ripening is placed at 40 DEG C, after penetration hardness reaches 350-450, that is, the corrosion-resistant sheet molding of continuously-directional fiber reinforcement is obtained
Material.
Embodiment 3：
Prepare the kg of isophthalic resin 28, the kg of polystyrene 10, the kg of styrene 5, the kg of barium sulfate 20, the kg of glass fibre 24：Continuously
Directional fiber is 4 with 25mm chopped strands amount ratio:2, peroxidized t-butyl perbenzoate（TBPB）0.45 kg, 1,4-benzoquinone powder
0.04 kg, the kg of magnesium oxide powder 0.4, the kg of zinc stearate 1.6, the kg of BYK996 auxiliary agents 0.4, the kg of BYK972 auxiliary agents 0.4.
Material etc. by more than in addition to thickening agent is pasted is weighed with certain proportion, is carried out being sufficiently mixed and is obtained resin paste, resin
Paste viscosity is about 80 P；The on-line mixing system that resin paste and thickening agent paste produce unit by sheet molding compound simultaneously is mixed
Close, then sheet material is obtained after being combined with continuously-directional glass fiber and short glass fiber, through dipping and compacting process；By sheet material
Ripening is placed at 40 DEG C, after penetration hardness reaches 350-450, that is, the corrosion-resistant sheet molding of continuously-directional fiber reinforcement is obtained
Material.
Comparative example：
Prepare adjacent benzene resin 30 kg, the kg of saturated polyester 8, the kg of styrene 3, carbonic acid Ca45 kg, the kg of glass fibre 25：All
For 25mm chopped strands, tert-butyl peroxy propylene carbonate（BIC-75）0.4 kg, the kg of 1,4-benzoquinone powder 0.02, magnesia powder
End 0.5 kg, the kg of zinc stearate 1.7, the kg of BYK996 auxiliary agents 0.40, the kg of BYK972 auxiliary agents 0.40.
Material etc. by more than in addition to thickening agent is pasted is weighed with certain proportion, is carried out being sufficiently mixed and is obtained resin paste, resin
Paste viscosity is about 88 P；The on-line mixing system that resin paste and thickening agent paste produce unit by sheet molding compound simultaneously is mixed
Close, then sheet material is obtained after being combined with continuously-directional glass fiber and short glass fiber, through dipping and compacting process；By sheet material
Ripening is placed at 40 DEG C, after penetration hardness reaches 350-450, that is, the enhanced conventional sheet molding compound of chopped strand is obtained.
Sheet molding compound prepared by embodiment 1-3 and comparative example is according to GB/T 1447, GB/T 1449, GB/T
1451st, the regulations of GB/T 1463 sample preparation respectively, and test its tensile strength, bending strength and impact strength.Its result is as follows：
Embodiment 1 and comparative example are prepared into respectively 300mmx300mm moulding plates, and its about 1/2 area is immersed in into new configuration
10 wt% sulphuric acid or sodium hydroxide solution in, at 23 ± 1 DEG C process 24 hours.Model is taken out afterwards is cleaned, contrast leaching
Visual condition more than bubble liquid level with region below.Simultaneously respectively from soak zone and non-soak zone, according to GB/T 1447, GB/T
1449th, phase after GB/T 1451, the regulations of GB/T 1463 sample preparation and test tensile strength and bending strength respectively, and then calculating is processed
The strength retention ratio answered.
As can be seen that using the fibre-reinforced corrosion-resistant sheet molding compound of continuously-directional（Embodiment 1- embodiment 3）, compare
In the enhanced conventional sheet molding compound of full chopped strand（Comparative example）, tensile strength, bending strength and impact strength have substantially
Raising.Meanwhile, using the fibre-reinforced corrosion-resistant sheet molding compound of continuously-directional 10wt% concentration sulphuric acid or sodium hydroxide
After processing 24 hours under room temperature in solution, without significant change, stretching is with bending strength retention rate more than 90% for outward appearance；And it is complete
The enhanced conventional sheet molding compound of chopped strand（Comparative example）After experience identical is processed, there are obvious Testudiniss to sample in outward appearance
Split, peel off, glossiness declines, while tensile strength only has respectively 64.6% and 78% with the retention rate of bending strength.
Above experimental data shows, using the fibre-reinforced corrosion-resistant sheet molding compound of continuously-directional full chopped strand is compared
Enhanced conventional sheet molding compound, is significantly improved in terms of intensity with corrosion resistance.
More than in each embodiment, in order that sheet molding compound is presented different colors, can be in preparation process
Add various pigment pastes.
By above-mentioned elaboration, those skilled in the art can implement.
Furthermore, it is necessary to explanation, the specific embodiment described in this specification, is named the shape of its parts and components
Claiming etc. can be with difference, and above the content described in this specification is only to present configuration example explanation.It is all according to
The equivalence changes done according to the construction described in inventional idea of the present invention, feature and principle or simple change, are included in this
In the protection domain of bright patent.Those skilled in the art can do various to described specific embodiment
The modification of various kinds or supplement are substituted using similar mode, structure without departing from the present invention or surmount present claims
Scope defined in book, all should belong to protection scope of the present invention.
Claims (10)
1. a kind of continuously-directional glass fiber strengthens corrosion-resistant sheet molding compound, it is characterised in that：The formula bag of the moulding compound
Material containing following mass parts：Unsaturated polyester resin 15-30 parts, shrinking agent 2-15 parts, styrene 1-5 parts, filler 15-50
Part, glass fibre 20-40 parts, initiator 0.1-0.6 parts, polymerization inhibitor 0.005-0.05 parts, thickening agent 0.1-0.7 parts, the interior demoulding
Agent 0.5-1.5 parts, processing aid 0.1-1.0 parts.
2. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Unsaturated polyester resin is one or two mixing of isophthalic resin or vinylite.
3. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Shrinking agent is one or two mixing of polystyrene or polymethyl methacrylate.
4. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Filler is barium sulfate or kaolinic one or two mixing.
5. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Glass fibre is the mixture of alkali-free continuous glass fibre and the chopped fiber that chopped length is 12-30 mm, and mixed proportion is：1:
6-6:1。
6. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Initiator is one or two mixing of peroxidized t-butyl perbenzoate or tert-butyl peroxy propylene carbonate.
7. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Polymerization inhibitor is 1,4-benzoquinone.
8. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Thickening agent is one or two mixture of magnesium oxide or magnesium hydroxide.
9. continuously-directional glass fiber according to claim 1 strengthens corrosion-resistant sheet molding compound, it is characterised in that：It is described
Inner pattern releasing agent applicable is one or two mixture of zinc stearate or calcium stearate；Processing aid is the one of BYK996 or BYK972
Kind or two kinds of mixture.
10. a kind of continuously-directional glass fiber strengthens the preparation method of corrosion-resistant sheet molding compound, using described in claim 1-9
Continuously-directional glass fiber strengthen corrosion-resistant sheet molding compound, it is characterised in that：Comprise the following steps：
A, by unsaturated polyester resin, shrinking agent, styrene, filler, initiator, polymerization inhibitor, inner pattern releasing agent applicable and processing aid
Deng weighing according to a certain percentage, carry out being thoroughly mixed obtaining resin paste；
B, thickening agent is mixed with vector resin, obtain thickening agent paste；
C, the on-line mixing system that resin paste and thickening agent paste produce unit by sheet molding compound simultaneously is mixed, then with continuously
After directional glass fiber and short glass fiber are compound, through dipping and compacting process sheet material is obtained；
D, sheet material is placed at a certain temperature ripening, after penetration hardness reaches certain limit, that is, obtain continuously-directional glass
The corrosion-resistant sheet molding compound of fiber reinforcement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611191299.9A CN106589878A (en) | 2016-12-21 | 2016-12-21 | Subsequent-orientated glass fiber reinforced corrosion-resistant sheet molding compound and preparation method therefor |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611191299.9A CN106589878A (en) | 2016-12-21 | 2016-12-21 | Subsequent-orientated glass fiber reinforced corrosion-resistant sheet molding compound and preparation method therefor |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828168A (en) * | 2017-11-20 | 2018-03-23 | 滁州华美塑业有限公司 | A kind of flame-proof weather-resisting color masterbatch and its production method |
| CN109354850A (en) * | 2018-09-12 | 2019-02-19 | 濮阳市盛源能源科技股份有限公司 | A kind of low shrinking unsaturated polyester resin moulding compound and preparation method thereof |
| CN115135474A (en) * | 2020-03-19 | 2022-09-30 | Dic株式会社 | Sheet molding compound and method for producing molded article |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696320A (en) * | 2009-08-21 | 2010-04-21 | 振石集团华美复合新材料有限公司 | Continuously-directional glass fiber reinforcement unsaturated polyester sheet molding compound |
-
2016
- 2016-12-21 CN CN201611191299.9A patent/CN106589878A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101696320A (en) * | 2009-08-21 | 2010-04-21 | 振石集团华美复合新材料有限公司 | Continuously-directional glass fiber reinforcement unsaturated polyester sheet molding compound |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107828168A (en) * | 2017-11-20 | 2018-03-23 | 滁州华美塑业有限公司 | A kind of flame-proof weather-resisting color masterbatch and its production method |
| CN109354850A (en) * | 2018-09-12 | 2019-02-19 | 濮阳市盛源能源科技股份有限公司 | A kind of low shrinking unsaturated polyester resin moulding compound and preparation method thereof |
| CN115135474A (en) * | 2020-03-19 | 2022-09-30 | Dic株式会社 | Sheet molding compound and method for producing molded article |
| CN115135474B (en) * | 2020-03-19 | 2024-04-16 | Dic株式会社 | Sheet molding compound and method for producing molded article |
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