CN107022146A - A kind of glass fiber reinforcement PP materials of low VOC and preparation method thereof - Google Patents
A kind of glass fiber reinforcement PP materials of low VOC and preparation method thereof Download PDFInfo
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- CN107022146A CN107022146A CN201710300042.0A CN201710300042A CN107022146A CN 107022146 A CN107022146 A CN 107022146A CN 201710300042 A CN201710300042 A CN 201710300042A CN 107022146 A CN107022146 A CN 107022146A
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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
- 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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/22—Compounding polymers with additives, e.g. colouring using masterbatch techniques
- C08J3/226—Compounding polymers with additives, e.g. colouring using masterbatch techniques using a polymer as a carrier
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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
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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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
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/9258—Velocity
- B29C2948/9259—Angular velocity
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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
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/10—Homopolymers or copolymers of propene
- C08J2323/12—Polypropene
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Abstract
The invention provides a kind of low VOC glass fiber reinforcement PP materials and preparation method thereof.The present invention is using PP materials as base-material, pass through the addition of extractant master batch, on the premise of equipment is not changed, VOC is excluded from material internal rather than absorption or the masking of eliminating smell agent by porosity are remained in material, the method reduction VOC effect is good, and the complexity of processing technology is increased without, and the consumption of extractant master batch is few, and the extractant master batch of 1.5~3.5 parts by weight of addition can meet popular PV3900 and PV3341 requirement；Grafting agent, antioxidant, the addition of glass fibre improve the mechanical property of PP materials, tensile strength is in more than 94MPa, and elongation at break is more than 3.1%, and bending modulus is in more than 7800MPa, melt index is in more than 3.4g/10min, and impact strength is in 10.5KJ/m2More than.
Description
Technical field
The invention belongs to technical field of polymer materials, it is related to a kind of low VOC glass fiber reinforcement PP materials and its system
Preparation Method.
Background technology
VOC is the english abbreviation of VOC (volatileorganiccompounds) under normal temperature, such as three
Vinyl chloride, tetrachloro-ethylene, formaldehyde, toluene, benzene, dimethylbenzene etc., other also have the various materials such as ethanol class and ketone.These chemistry
Material has the features such as volatile (easily drying), lipophile (easy degreasing), using these features, is used extensively in industrial circle
Make the solvent or cleaning agent of coating, adhesive etc..But, these chemical substances can to the nervous system of people, immune system, interior point
Secrete system etc. and cause infringement, serious being also possible to is carcinogenic.
VOC in domestic market reduction material generally has set absorption, covering to cover up by the way of, chemical taste removal
Etc. mode, but these modes VOC still can be remained in material, it is impossible to excluded.Supplier also is in order to reduce in material
VOC, devolatilization processing is carried out using the method for high-temperature baking, but this method can cause the reduction of material property.Current state
Larger modification factory of interior a few families is using the method for leading to inert gas devolatilization, but the method is higher to equipment requirement, complex process.
CN106117786A provides a kind of low VOC low-density glass fiber reinforced polypropylene composite material and application, including poly-
35-75 parts of propylene, 4.5-6 parts of hollow glass micropearl, 15-45 parts of glass fibre, 0-5 parts of talcum powder, antioxidant 0.2-0.5
Part, 0.3-0.5 parts of ultraviolet-resistant aid, 2-4 parts of compatilizer, 3-4 parts of VOC inhibitor, wherein the VOC inhibitor includes nanometer light
Catalyst, attapulgite, sepiolite and diatomite, adsorb organic volatilization gas, VOC can also by the loose structure of VOC inhibitor
Residue in material internal.
The content of the invention
In view of the shortcomings of the prior art, an object of the present invention is to provide a kind of low VOC glass fiber reinforcement PP
Material, the consumption of extractant master batch is few, VOC content in glass fiber reinforcement PP materials is effectively reduced.
For up to this purpose, the present invention uses following technical scheme：
A kind of glass fiber reinforcement PP materials of low VOC, by weight, including following preparing raw material：
PP58~80 part, such as 58 parts, 59 parts, 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68
Part, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts, 76 parts, 77 parts, 78 parts, 79 parts, 80 parts；
10~40 parts of glass fibre, such as 10 parts, 15 parts, 20 parts, 25 parts, 30 parts, 35 parts, 40 parts；
5~10 parts of grafting agent, such as 5 parts, 6 parts, 7 parts, 8 parts, 9 parts, 10 parts；
0.2~0.5 part of antioxidant agent, such as 0.2 part, 0.3 part, 0.4 part, 0.5 part
1.5~3.5 parts of extractant master batch, such as 1.5 parts, 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2
Part, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts.
Signified low VOC of the invention glass fiber reinforcement PP materials mean that VOC content is less than 50ugC/g, further
Ground is that VOC content is less than 30ugC/g.
The present invention is modified enhancing using PP materials as base-material using glass fibre, by the addition of extractant master batch,
On the premise of not changing equipment, VOC is excluded from material internal rather than absorption or the masking of eliminating smell agent by porosity
Remain in material, the method reduction VOC effect is better than other method, and is increased without the complicated journey of processing technology
Degree, and the consumption of extractant master batch is few, the extractant master batches of 1.5~3.5 parts by weight of addition can meet popular PV3900 and
PV3341 requirement.
Wherein, the reduction VOC of extractant master batch principle is that the base-material containing extractant master batch is made by thermal softening in shearing
Lower boiling extractant is discharged under, extractant contacts mixing with the VOC in base-material under screw rod shearing effect, extraction of dissolving each other
Take, be gasificated into a large amount of microvesicles after being heated, the microvesicle containing VOC is pulled out removal under suction function.
In the present invention, described PP can be HOPP (PP-H), block copolymerization polypropylene (PP-B) and randomly be total to
Poly- polypropylene (PP-R), it is preferable that PP is the PP resins that hydrogen-regulating method is produced, the PP materials produced relative to organic peroxy edman degradation Edman
Material, PP-H resins prepared by hydrogen-regulating method are as base-material, and VOC of its base-material content itself is low.
In the present invention, described grafting agent is BONDYRAM 1001, ADDIBOND 100PP or BONDYRAM 1001 with
ADDIBOND 100PP mixture.It is multiple that AddiBond 100PP are mainly used in fiberglass reinforced PP, mineral and Wood flour filled PP etc.
Condensation material improve interface compatibility and affinity, as polymer coupler and adhesive, can increase substantially filling or
The mechanical mechanics property and heat resistance of RPP.
In the present invention, the extractant master batch is SOLV40-01 and/or LDV1040, the fusing point of the kind of extractants master batch
Low, carrier is volatile, is difficult to remain in resin.
In the present invention, described antioxidant is IRGANOX 1010 and/or SONGNOX 11B, the antioxygen of this kind antioxidant
Change performance excellent, prevent resin by thermal cracking, it is good with resin compatible, it will not additionally increase VOC source
The second object of the present invention is the preparation method for providing the glass fiber reinforcement PP materials of low VOC a kind of, including
Following steps：By weight, by 58~80 parts of PP, 1.5~3.5 parts of extractant master batch, 5~10 parts of grafting agent, 0.2
~0.5 part of antioxidant is sequentially added in mixer and mixed, and the material mixed is added in double screw extruder, in twin-screw
The side spout of extruder adds 10~40 parts of glass fibre, extruded, pelletizing, the glass fibers sieved, be dried to obtain low VOC
Dimension enhancing PP materials.
Wherein, the mixing speed of the mixer is 200~300r/min, such as 200r/min, 210r/min, 220r/
min、230r/min、240r/min、250r/min、260r/min、270r/min、280r/min、290r/min、300r/min。
Wherein, the nib of the double screw extruder is 12~17；Preferably, the extrusion temperature of the double screw extruder
Spend low for the extrusion temperature in the proparea of 100~230 DEG C of double screw extruders, be 100~120 DEG C, low extrusion temperature can be kept away
Exempt from the gasification too early of the extractant composition in extractant master batch and weaken it and extract effect.
Preferably, the rotating speed of the screw extruder be 400~500r/min, such as 400r/min, 410r/min,
420r/min、430r/min、440r/min、450r/min、460r/min、470r/min、480r/min、490r/min、500r/
min。
Preferably, the extrusion temperature of the double screw extruder is three sections of temperature controls, and first paragraph temperature is 100 DEG C, second segment
Temperature is 120 DEG C, and the 3rd section of temperature is 230 DEG C, this avoid the too early gasification of extractant composition in extractant master batch, maximum
Its extraction effect of the performance of limit.
Preferably, low VOC of the invention glass fiber reinforcement PP materials, comprise the following steps：By weight, by 58
~80 parts of PP, 1.5~3.5 parts of extractant master batch, 5~10 parts of grafting agent, 0.2~0.5 part of antioxidant are sequentially added
Mixed in mixer, the material mixed added in double screw extruder, the mixing speed of the mixer for 200~
300r/min, 10~40 parts of glass fibre, the mould of the double screw extruder are added in the side spout of double screw extruder
Hole is 12~17, and the rotating speed of the screw extruder is 400~500r/min, and the extrusion temperature of the double screw extruder is
100~230 DEG C, the extrusion temperature of the double screw extruder is three sections of temperature controls, and first paragraph is first area, and first paragraph temperature is
100 DEG C, second segment is second area, and second segment temperature is 120 DEG C, and the 3rd section is the 3rd~the 11st region, the 3rd section of temperature
For 230 DEG C, extruded, pelletizing, the glass fiber reinforcement PP materials for sieving, being dried to obtain low VOC.
Compared with prior art, beneficial effects of the present invention are：
(1) addition of extractant master batch, effectively reduces the content of VOC in glass fiber reinforcement PP materials, and its content exists
Below 30ugC/g.
(2) consumption of extractant master batch is few, need to only add the extractant master batch of 1.5~3.5 parts by weight and can meet masses
PV3900 and PV3341 requirement.
(3) grafting agent, antioxidant, the addition of glass fibre improve the mechanical property of PP materials, and tensile strength is in 94MPa
More than, elongation at break is more than 3.1%, and bending modulus is in more than 7800MPa, and melt index is in more than 3.4g/10min, punching
Hit intensity is in 10.5KJ/m2More than.
Embodiment
Technical scheme is further illustrated below by embodiment.
Unless specific instructions, various raw materials of the invention are commercially available buys, or is prepared according to the conventional method of this area
Obtain.
Embodiment 1
By weight, by 58.5 parts of PP, 1.5 parts of extractant master batch, 5 parts of grafting agent, 0.3 part of antioxidant according to
In secondary addition high-speed mixer, 0.25h is mixed with 200r/min speed, the material mixed is added into double screw extruder
In, 40 parts of glass fibre is added in No. three side spouts, it is 450r/min to control screw speed, controls the extrusion temperature to be：
100 DEG C of first area, 120 DEG C of second area, the 3rd~the 11st regional temperature is 230 DEG C, and it is true that extruder is used when extruding
The pressure of empty pump>0.08Mpa, the material of extrusion is prepared after pelletizing, sieving, drying low VOC glass fiber reinforcement
PP materials.
Embodiment 2
By weight, by 60 parts of PP, 2.5 parts of extractant master batch, 6 parts of grafting agent, 0.3 part of antioxidant successively
Add in high-speed mixer, 0.25h mixed with 250r/min speed, the material mixed is added in double screw extruder,
30 parts of glass fibre is added in No. three side spouts, it is 500r/min to control screw speed, controls the extrusion temperature to be：First
110 DEG C of region, 120 DEG C of second area, the 3rd~the 11st regional temperature is 230 DEG C, the vavuum pump that extruder is used when extruding
Pressure>0.08Mpa, the material of extrusion is prepared after pelletizing, sieving, drying low VOC glass fiber reinforcement PP materials
Material.
Embodiment 3
By weight, by 70 parts of PP, 3.5 parts of extractant master batch, 8 parts of grafting agent, 0.4 part of antioxidant successively
Add in high-speed mixer, 0.25h mixed with 300r/min speed, the material mixed is added in double screw extruder,
40 parts of glass fibre is added in No. three side spouts, it is 460r/min to control screw speed, controls the extrusion temperature to be：First
100 DEG C of region, 120 DEG C of second area, the 3rd~the 11st regional temperature is 230 DEG C, the vavuum pump that extruder is used when extruding
Pressure>0.08Mpa, the material of extrusion is prepared after pelletizing, sieving, drying low VOC glass fiber reinforcement PP materials
Material.
Embodiment 4
By weight, by 80 parts of PP, 2.6 parts of extractant master batch, 10 parts of grafting agent, 0.5 part of antioxidant according to
In secondary addition high-speed mixer, 0.25h is mixed with 220r/min speed, the material mixed is added into double screw extruder
In, 10 parts of glass fibre is added in No. three side spouts, it is 450r/min to control screw speed, controls the extrusion temperature to be：
100 DEG C of first area, 120 DEG C of second area, the 3rd~the 11st regional temperature is 230 DEG C, and it is true that extruder is used when extruding
The pressure of empty pump>0.08Mpa, the material of extrusion is prepared after pelletizing, sieving, drying low VOC glass fiber reinforcement
PP materials.
Comparative example 1
By weight, 58.5 parts of PP, 5 parts of grafting agent, 0.3 part of antioxidant are sequentially added into high-speed mixer
In, 0.25h is mixed with 200r/min speed, the material mixed is added in double screw extruder, by 40 parts of glass fibers
Dimension is added in No. three side spouts, control screw speed for 450r/min, controls the extrusion temperature to be：100 DEG C of first area, second
120 DEG C of region, the 3rd~the 11st regional temperature is 230 DEG C, the pressure for the vavuum pump that extruder is used when extruding>0.08Mpa,
The material of extrusion is prepared into glass fiber reinforcement PP materials after pelletizing, sieving, drying.
PP materials made from the glass fiber reinforcement PP materials and comparative example 1 of low VOC made from embodiment 1-4 are carried out
Performance test and VOC tests, test result are as shown in table 1.
Table 1
Relative to being not added with extractant master batch and being not added with PP made from glass fibre in comparative example it can be seen from the data of table 1
Material, the addition of low VOC prepared by present invention glass fiber reinforcement PP material extractant master batches, effectively reduces glass fibre
Strengthen the content of VOC in PP materials, its content is in below 30ugC/g；The consumption of extractant master batch is few, only need to add 1.5~3.5
The extractant master batch of parts by weight can meet popular PV3900 and PV3341 requirement；Grafting agent, heat stabilizer, glass fibre
The mechanical property for improving PP materials is added, tensile strength is in more than 94MPa, and elongation at break is more than 3.1%, bending modulus
In more than 7800MPa, melt index is in more than 3.4g/10min, and impact strength is in 10.5KJ/m2More than.
The present invention glass fiber reinforcement PP materials reduction VOC method be on the premise of equipment is not changed, by VOC from
Material internal exclusion rather than the absorption by porosity or the masking of eliminating smell agent are remained in material, the method reduction VOC
Effect it is good, and be increased without the complexity of processing technology.
Applicant states that the present invention illustrates detailed process equipment and the technological process of the present invention by above-described embodiment,
But the invention is not limited in above-mentioned detailed process equipment and technological process, that is, do not mean that the present invention has to rely on above-mentioned detailed
Process equipment and technological process could be implemented.Person of ordinary skill in the field it will be clearly understood that any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within the present invention's
Within the scope of protection domain and disclosure.
Claims (10)
1. a kind of low VOC glass fiber reinforcement PP materials, it is characterised in that by weight, including following preparing raw material：
2. low VOC according to claim 1 glass fiber reinforcement PP materials, it is characterised in that the PP is hydrogen-regulating method
The PP resins of production.
3. low VOC according to claim 1 or 2 glass fiber reinforcement PP materials, it is characterised in that the grafting agent is
BONDYRAM 1001, ADDIBOND 100PP or BONDYRAM 1001 and ADDIBOND 100PP mixture.
4. the glass fiber reinforcement PP materials of the low VOC according to one of claim 1-3, it is characterised in that the extraction
Agent master batch is SOLV40-01 and/or LDV1040.
5. the glass fiber reinforcement PP materials of the low VOC according to one of claim 1-4, it is characterised in that the antioxygen
Agent is IRGANOX 1010 and/or SONGNOX 11B.
6. a kind of preparation method of the glass fiber reinforcement PP materials of low VOC as described in one of claim 1-5, its feature exists
In comprising the following steps：By weight, 58~80 parts of PP, 1.5~3.5 parts of extractant master batch, 5~10 parts are connect
Branch agent, 0.2~0.5 part of antioxidant are sequentially added in mixer and mixed, and the material mixed is added in double screw extruder,
10~40 parts of glass fibre is added in the side spout of double screw extruder, extruded, pelletizing, is sieved, is dried to obtain low VOC
Glass fiber reinforcement PP materials.
7. preparation method according to claim 6, it is characterised in that the mixing speed of the mixer is 200~300r/
min。
8. the preparation method according to claim 6 or 7, it is characterised in that the nib of the double screw extruder is 12~
17；
Preferably, the extrusion temperature of the double screw extruder is 100~230 DEG C；
Preferably, the rotating speed of the screw extruder is 400~500r/min.
9. the preparation method according to one of claim 6-8, it is characterised in that the extrusion temperature of the double screw extruder
For three sections of temperature controls, first paragraph temperature is 100 DEG C, and second segment temperature is 120 DEG C, and the 3rd section of temperature is 230 DEG C.
10. the preparation method according to one of claim 6-9, it is characterised in that comprise the following steps：By weight,
By 58~80 parts of PP, 1.5~3.5 parts of extractant master batch, 5~10 parts of grafting agent, 0.2~0.5 part of antioxidant successively
Add in mixer and mix, the material mixed is added in double screw extruder, the mixing speed of the mixer for 200~
300r/min, 10~40 parts of glass fibre, the mould of the double screw extruder are added in the side spout of double screw extruder
Hole is 12~17, and the rotating speed of the screw extruder is 400~500r/min, and the extrusion temperature of the double screw extruder is
100~230 DEG C, the extrusion temperature of the double screw extruder is three sections of temperature controls, and first paragraph temperature is 100 DEG C, second segment temperature
For 120 DEG C, the 3rd section of temperature is 230 DEG C, extruded, pelletizing, the glass fiber reinforcement PP materials for sieving, being dried to obtain low VOC.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107815021A (en) * | 2017-11-15 | 2018-03-20 | 常州市新创智能科技有限公司 | A kind of stability PP resins combined with glass fibre |
| CN109762247A (en) * | 2018-12-25 | 2019-05-17 | 合肥卡洛塑业科技有限公司 | A kind of high heat resistance oxygen aging glass fiber reinforced polypropylene composite material and preparation method thereof |
| CN110938257A (en) * | 2019-11-20 | 2020-03-31 | 东莞市雄林新材料科技股份有限公司 | Low-VOC (volatile organic compound) volatilization and high-flame-retardant TPO (thermoplastic polyolefin) composite material and preparation method thereof |
| CN111253737A (en) * | 2020-04-20 | 2020-06-09 | 苏州威瑞成新材料有限公司 | Environment-friendly fireproof PA6 composite material and preparation method thereof |
| CN114437455A (en) * | 2020-11-03 | 2022-05-06 | 苏州荣昌复合材料有限公司 | Low-VOC PP material and preparation method thereof |
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| CN111253737A (en) * | 2020-04-20 | 2020-06-09 | 苏州威瑞成新材料有限公司 | Environment-friendly fireproof PA6 composite material and preparation method thereof |
| CN114437455A (en) * | 2020-11-03 | 2022-05-06 | 苏州荣昌复合材料有限公司 | Low-VOC PP material and preparation method thereof |
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