CN117465037A - Preparation method of flame-retardant polypropylene honeycomb plate - Google Patents
Preparation method of flame-retardant polypropylene honeycomb plate Download PDFInfo
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- CN117465037A CN117465037A CN202311672583.8A CN202311672583A CN117465037A CN 117465037 A CN117465037 A CN 117465037A CN 202311672583 A CN202311672583 A CN 202311672583A CN 117465037 A CN117465037 A CN 117465037A
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- honeycomb
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- 239000004743 Polypropylene Substances 0.000 title claims abstract description 66
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 55
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 title claims abstract description 25
- 239000003063 flame retardant Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title claims abstract description 24
- -1 polypropylene Polymers 0.000 title claims abstract description 21
- 239000010985 leather Substances 0.000 claims abstract description 56
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 40
- 238000000227 grinding Methods 0.000 claims abstract description 38
- 239000002956 ash Substances 0.000 claims abstract description 35
- 239000000758 substrate Substances 0.000 claims abstract description 29
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 20
- 239000003365 glass fiber Substances 0.000 claims abstract description 20
- 238000001746 injection moulding Methods 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 15
- 239000004744 fabric Substances 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims abstract description 8
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 238000001035 drying Methods 0.000 claims description 57
- 238000001816 cooling Methods 0.000 claims description 14
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 238000012216 screening Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims 4
- 238000007493 shaping process Methods 0.000 abstract description 10
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 238000005469 granulation Methods 0.000 abstract 1
- 230000003179 granulation Effects 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 239000012792 core layer Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 102000008186 Collagen Human genes 0.000 description 1
- 108010035532 Collagen Proteins 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003963 antioxidant agent Substances 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229920001436 collagen Polymers 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000012815 thermoplastic material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a preparation method of a flame-retardant polypropylene honeycomb plate, which mainly comprises three steps of S1, preparation of a honeycomb substrate, S2, preparation of a panel and S3, wherein the preparation of the honeycomb plate mainly comprises extrusion granulation of leather grinding ash, PP, glass fiber and calcium carbonate, injection molding and shaping are carried out through honeycomb molding equipment to obtain a honeycomb core with a certain thickness, the preparation of the panel mainly comprises blending extrusion molding of the leather grinding ash and the PP, and composite fiber mesh cloth, and the polypropylene honeycomb plate is obtained after the leather grinding ash, the PP, the glass fiber and the calcium carbonate are bonded. According to the invention, the leather buffing ash is applied to the PP, so that the leather buffing ash is recycled, the environmental pollution is reduced, the flame retardant property of the PP honeycomb board is endowed, the waste utilization is realized, and the integral strength is improved.
Description
Technical Field
The invention relates to the technical field of honeycomb plates, in particular to a preparation method of a flame-retardant polypropylene honeycomb plate.
Background
Polypropylene (PP) honeycomb is a plastic sheet that is extruded using a production line. The waterproof and moistureproof material has the performances of light weight, high strength, high elastic modulus and high impact resistance; the environment protection performance is good, the thermoplastic material can be crushed, granulated and recycled after being scrapped, and the pollution to the environment is reduced. Compared with the solid plate, the middle core layer of the PP honeycomb plate core layer is special honeycomb, the inner space of the plate is divided into a plurality of closed cavities, and the mutual flow of air can be prevented, so that the heat conducting performance of the PP honeycomb plate is greatly reduced, and the PP honeycomb plate has a good heat insulation effect; and effectively blocks the transmission of sound, so that the PP honeycomb plate has good sound insulation function. The hollow structure of the PP honeycomb plate core layer also has better cold resistance, so that the PP honeycomb plate can be used in heat insulation and heat preservation occasions.
However, polypropylene is inferior in flame retardancy and weather resistance. In related researches, a great amount of flame retardant and antioxidant are generally added into polypropylene, so that the flame retardant grade of the polypropylene reaches V0 grade. This will greatly increase the cost and prevent the use of polypropylene honeycomb panels.
Meanwhile, china is one of the main countries of leather production in the world, and the raw leather is processed by about 10 ten thousand t each year. The wet cowhide of 1t can only produce 150-200 kg of finished leather, and 800kg of solid waste including meat, shaved chrome leather scraps, cut and trimmed leather scraps and buffing ash, and the buffing ash (BD) is a fine solid particle including collagen, oil, tanning agent, dye chemical, synthetic fat and the like, and if directly discharged, the solid waste causes huge environmental pollution. If the flame retardant is added to the preparation of the polypropylene honeycomb plate, the cost of the polypropylene honeycomb plate is reduced, and meanwhile, the flame retardant has certain environmental protection significance, so that the design of the polypropylene honeycomb plate which can use the leather dust and has higher use strength is quite significant.
Disclosure of Invention
The invention aims to avoid the defects existing in the prior art, and provides a preparation method of a flame-retardant polypropylene honeycomb plate, which recycles waste and can improve the use strength and flame-retardant effect.
The invention solves the technical problems by adopting the following technical scheme: the preparation method of the flame-retardant polypropylene honeycomb plate comprises the following steps:
s1, preparing a honeycomb substrate, which comprises the following steps:
s1.1, grinding leather ash in a superfine mechanical grinder, drying, and screening through a 100-mesh sieve;
s1.2, drying the leather grinding ash obtained in the S1.1, PP, glass fiber and calcium carbonate in a constant-temperature blast drying oven, setting the temperature to be 110 ℃, and drying for 3 hours;
s1.3, throwing the leather grinding ash, PP, glass fiber and calcium carbonate obtained in the S1.2 into a screw extruder for melting, setting the temperature of the extruder to be 180-210 ℃, setting the rotating speed of a main screw to be 100r/min, blending and extruding the obtained molten extrusion film through the extruder, cooling and granulating, and placing the obtained molten extrusion film into a constant-temperature blast drying box at the temperature of 100 ℃ for drying for 3 hours to obtain a premix;
s1.4, injection molding the premix obtained in the step S1.3 into a honeycomb core with a certain thickness through honeycomb molding equipment to obtain a honeycomb substrate;
s2, preparing a panel, which comprises the following steps:
s2.1, drying the leather grinding ash obtained in the step S1.1 and PP in a constant-temperature blast drying oven, setting the temperature to be 110 ℃, and drying for 3 hours;
s2.2, throwing the leather grinding ash obtained in the S2.1 and PP into a screw extruder for melting, setting the temperature of the extruder to 185-215 ℃ and the rotating speed of a main screw to 100r/min, blending and extruding the obtained molten extrusion film through the extruder, cooling and granulating, and placing the obtained molten extrusion film into a constant-temperature blast drying box at 100 ℃ for drying for 3 hours to obtain a premix;
s2.3, extruding and molding the premix obtained in the step S2.2 through an injection molding machine, and cutting to obtain a prefabricated plate with a certain specification;
s2.4, preparing fiber mesh cloth with corresponding specification, and respectively gluing the two prefabricated plates obtained in the S2.3 on two sides of the fiber mesh cloth to obtain a panel;
s3, preparing the honeycomb plate, namely grinding one side face of the panel to manufacture a rough surface, improving the adhesive force, coating glue on the rough surface, covering two sides of the honeycomb substrate, and curing to obtain the honeycomb plate.
In several embodiments, in S1.4, the injection temperature is 200 to 220 ℃, the injection pressure is 0.4 to 0.6MPa, the dwell pressure is 0.6 to 0.9MPa, and the dwell time is 20S.
In several embodiments, in the S1, the mass ratio of PP, leather dust, glass fiber, and calcium carbonate is: 100:4-8:5-10:15-20.
In several embodiments, in the S2, the mass ratio of PP to leather ash is: 100:10-15.
In several embodiments, the buffing ash is a cow leather buffing ash.
In several embodiments, the height ratio of the face sheet to the honeycomb substrate is in the range of 1:10-15.
The invention has the beneficial effects that:
according to the invention, the leather grinding ash is applied to the PP, so that the leather grinding ash is reused, the environmental pollution is reduced, the flame retardant property of the PP honeycomb board is endowed, and the waste utilization is realized.
The honeycomb substrate is composed of PP, leather dust, glass fiber and calcium carbonate, and has high strength, flame retardance and high impact resistance.
The panel provided by the invention is composed of the prefabricated plate made of PP and leather buffing ash and the fiber mesh cloth, has a flame retardant effect, and can improve the strength, and the connection stability can be improved by bonding the rough surface with the honeycomb substrate.
Detailed Description
Embodiments of the present invention will be described in detail below, and for the purpose of making the objects, technical solutions, and advantages of the embodiments of the present invention more apparent, it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments.
Thus, the following detailed description of the embodiments of the invention is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention, based on which all other embodiments that may be obtained by one of ordinary skill in the art without inventive effort are within the scope of the invention.
The preparation method of the flame-retardant polypropylene honeycomb plate mainly comprises three steps, namely preparation of a honeycomb substrate, preparation of a panel and preparation of the honeycomb plate, wherein the preparation of the honeycomb substrate and the preparation of the panel can be carried out sequentially or synchronously.
Specifically, S1, preparation of a honeycomb substrate, comprising:
s1.1, grinding leather grinding ash of the leather in a superfine mechanical grinder, drying and screening through a 100-mesh sieve; s1.2, drying the leather grinding ash obtained in the S1.1, PP, glass fiber and calcium carbonate in a constant-temperature blast drying oven, setting the temperature to be 110 ℃, and drying for 3 hours;
s1.3, throwing the leather grinding ash, PP, glass fiber and calcium carbonate obtained in the S1.2 into a screw extruder for melting, setting the temperature of the extruder to be 180-210 ℃, setting the rotating speed of a main screw to be 100r/min, blending and extruding the obtained molten extrusion film through the extruder, cooling and granulating, and placing the obtained molten extrusion film into a constant-temperature blast drying box at the temperature of 100 ℃ for drying for 3 hours to obtain a premix;
s1.4, injecting and shaping the premix obtained in the step S1.3 into a honeycomb core with a certain thickness through honeycomb forming equipment to obtain a honeycomb substrate, wherein the injection molding temperature is 200-220 ℃, the injection molding pressure is 0.4-0.6 MPa, the holding pressure is 0.6-0.9 MPa, and the holding time is 20S;
wherein, the mass ratio of PP, leather grinding ash, glass fiber and calcium carbonate is as follows: 100:4-8:5-10:15-20.
And, S2, preparation of a panel comprising:
s2.1, drying the leather grinding ash obtained in the step S1.1 and PP in a constant-temperature blast drying oven, setting the temperature to be 110 ℃, and drying for 3 hours;
s2.2, throwing the leather grinding ash obtained in the S2.1 and PP into a screw extruder for melting, setting the temperature of the extruder to 185-215 ℃ and the rotating speed of a main screw to 100r/min, blending and extruding the obtained molten extrusion film through the extruder, cooling and granulating, and placing the obtained molten extrusion film into a constant-temperature blast drying box at 100 ℃ for drying for 3 hours to obtain a premix;
s2.3, extruding and molding the premix obtained in the step S2.2 through an injection molding machine, and cutting to obtain a prefabricated plate with a certain specification;
s2.4, preparing fiber mesh cloth with corresponding specification, and respectively gluing the two prefabricated plates obtained in the S2.3 on two sides of the fiber mesh cloth to obtain a panel;
wherein, the mass ratio of PP and leather grinding ash is as follows: 100:10 to 15, preferably 100:12.
And S3, preparing the honeycomb plate, grinding one side surface of the panel to manufacture a rough surface, coating glue on the rough surface, covering two sides of the honeycomb substrate, and curing to obtain the honeycomb plate.
Example 1
The preparation of the honeycomb substrate comprises the following steps:
step 1: crushing the leather grinding ash of the cow leather in an ultrafine mechanical crusher, drying, and screening through a 100-mesh sieve;
step 2: drying PP, leather grinding ash, glass fiber and calcium carbonate in a constant-temperature blast drying oven, setting the temperature to 110 ℃, and drying for 3 hours;
step 3: PP, leather grinding ash, glass fiber and calcium carbonate are poured into a mixing cylinder according to the proportion of 100:4:5:15, and the raw materials are mixed for 10 minutes to be uniform;
step 4: melting the step 3 by a double-screw extruder, setting the temperature of the extruder to be 180-210 ℃ and the rotating speed of a main screw to be 100r/min, blending and extruding the obtained molten extrusion film by the extruder, cooling and granulating, and drying the obtained molten extrusion film in a constant-temperature blast drying oven at 100 ℃ for 3 hours;
step 5: and (3) cooling and shaping the premix obtained in the step (4) into a honeycomb substrate with a specific thickness by specific shaping equipment, wherein the injection molding temperature is 200-220 ℃, the injection molding pressure is 0.4-0.6 MPa, the holding pressure is 0.6-0.9 MPa, and the holding time is 20s.
Wherein, the bending strength of the obtained honeycomb substrate after being combined with the panel is 40MPa, and the flame retardant grade is V1 grade.
Example 2
The preparation of the honeycomb substrate comprises the following steps:
step 1: crushing the leather grinding ash of the cow leather in an ultrafine mechanical crusher, drying, and screening through a 100-mesh sieve;
step 2: drying PP, leather grinding ash, glass fiber and calcium carbonate in a constant-temperature blast drying oven, setting the temperature to 110 ℃, and drying for 3 hours;
step 3: PP, leather grinding ash, glass fiber and calcium carbonate are poured into a mixing cylinder according to the proportion of 100:8:10:20, and the raw materials are mixed for 10 minutes to be uniform;
step 4: melting the step 3 by a double-screw extruder, setting the temperature of the extruder to be 180-210 ℃ and the rotating speed of a main screw to be 100r/min, blending and extruding the obtained molten extrusion film by the extruder, cooling and granulating, and drying the obtained molten extrusion film in a constant-temperature blast drying oven at 100 ℃ for 3 hours;
step 5: and (3) cooling and shaping the premix obtained in the step (4) into a honeycomb substrate with a specific thickness by specific shaping equipment, wherein the injection molding temperature is 200-220 ℃, the injection molding pressure is 0.4-0.6 MPa, the holding pressure is 0.6-0.9 MPa, and the holding time is 20s.
The obtained honeycomb substrate has a bending strength of 52MPa after being combined with a panel, and the flame retardant grade is V0 grade.
Example 3
The preparation of the honeycomb substrate comprises the following steps:
step 1: crushing the leather grinding ash of the cow leather in an ultrafine mechanical crusher, drying, and screening through a 100-mesh sieve;
step 2: drying PP, leather grinding ash, glass fiber and calcium carbonate in a constant-temperature blast drying oven, setting the temperature to 110 ℃, and drying for 3 hours;
step 3: PP, leather grinding ash, glass fiber and calcium carbonate are poured into a mixing cylinder according to the proportion of 100:6:7:18, and the raw materials are mixed for 10 minutes to be uniform;
step 4: melting the step 3 by a double-screw extruder, setting the temperature of the extruder to be 180-210 ℃ and the rotating speed of a main screw to be 100r/min, blending and extruding the obtained molten extrusion film by the extruder, cooling and granulating, and drying the obtained molten extrusion film in a constant-temperature blast drying oven at 100 ℃ for 3 hours;
step 5: and (3) cooling and shaping the premix obtained in the step (4) into a honeycomb substrate with a specific thickness by specific shaping equipment, wherein the injection molding temperature is 200-220 ℃, the injection molding pressure is 0.4-0.6 MPa, the holding pressure is 0.6-0.9 MPa, and the holding time is 20s.
The obtained honeycomb substrate has a bending strength of 47MPa after being combined with a panel, and the flame retardant grade is V0 grade.
Example 4
The preparation of the honeycomb substrate comprises the following steps:
step 1: crushing the leather grinding ash of the cow leather in an ultrafine mechanical crusher, drying, and screening through a 100-mesh sieve;
step 2: drying PP, leather grinding ash, glass fiber and calcium carbonate in a constant-temperature blast drying oven, setting the temperature to 110 ℃, and drying for 3 hours;
step 3: PP, leather grinding ash, glass fiber and calcium carbonate are poured into a mixing cylinder according to the proportion of 100:4:7:18, and the raw materials are mixed for 10 minutes to be uniform;
step 4: melting the step 3 by a double-screw extruder, setting the temperature of the extruder to be 180-210 ℃ and the rotating speed of a main screw to be 100r/min, blending and extruding the obtained molten extrusion film by the extruder, cooling and granulating, and drying the obtained molten extrusion film in a constant-temperature blast drying oven at 100 ℃ for 3 hours;
step 5: and (3) cooling and shaping the premix obtained in the step (4) into a honeycomb substrate with a specific thickness by specific shaping equipment, wherein the injection molding temperature is 200-220 ℃, the injection molding pressure is 0.4-0.6 MPa, the holding pressure is 0.6-0.9 MPa, and the holding time is 20s.
The bending strength of the obtained honeycomb substrate after being combined with the panel is 45MPa, and the flame retardant grade is V1 grade.
Comparative example
The PP raw material is molded into a honeycomb substrate through specific injection molding equipment, meanwhile, the PP raw material is molded into a panel through an extruder, and the bending strength obtained by bonding the PP raw material and the panel is 28MPa, and the flame retardant grade is V1 grade.
All of the manners described herein may be performed in any suitable order. The use of any and all examples, or exemplary language (e.g., "such as") provided herein, is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention unless otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as essential to the practice of the invention.
The present invention describes preferred embodiments, including the best mode known to the inventors for carrying out the invention. Variations of these preferred embodiments will, of course, be apparent to those skilled in the art. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the invention to be practiced otherwise than as specifically described herein. Accordingly, this invention includes all modifications encompassed within the spirit and scope of the invention as defined by the claims. Moreover, unless indicated otherwise or clearly contradicted by context, the present invention includes any of the above-described factors and all possible variations thereof.
Claims (6)
1. The preparation method of the flame-retardant polypropylene honeycomb plate is characterized by comprising the following steps of:
s1, preparing a honeycomb substrate, which comprises the following steps:
s1.1, grinding leather ash in a superfine mechanical grinder, drying, and screening through a 100-mesh sieve;
s1.2, drying the leather grinding ash obtained in the S1.1, PP, glass fiber and calcium carbonate in a constant-temperature blast drying oven, setting the temperature to be 110 ℃, and drying for 3 hours;
s1.3, throwing the leather grinding ash, PP, glass fiber and calcium carbonate obtained in the S1.2 into a screw extruder for melting, setting the temperature of the extruder to be 180-210 ℃, setting the rotating speed of a main screw to be 100r/min, blending and extruding the obtained molten extrusion film through the extruder, cooling and granulating, and placing the obtained molten extrusion film into a constant-temperature blast drying box at the temperature of 100 ℃ for drying for 3 hours to obtain a premix;
s1.4, injection molding the premix obtained in the step S1.3 into a honeycomb core with a certain thickness through honeycomb molding equipment to obtain a honeycomb substrate;
s2, preparing a panel, which comprises the following steps:
s2.1, drying the leather grinding ash obtained in the step S1.1 and PP in a constant-temperature blast drying oven, setting the temperature to be 110 ℃, and drying for 3 hours;
s2.2, throwing the leather grinding ash obtained in the S2.1 and PP into a screw extruder for melting, setting the temperature of the extruder to 185-215 ℃ and the rotating speed of a main screw to 100r/min, blending and extruding the obtained molten extrusion film through the extruder, cooling and granulating, and placing the obtained molten extrusion film into a constant-temperature blast drying box at 100 ℃ for drying for 3 hours to obtain a premix;
s2.3, extruding and molding the premix obtained in the step S2.2 through an injection molding machine, and cutting to obtain a prefabricated plate with a certain specification;
s2.4, preparing fiber mesh cloth with corresponding specification, and respectively gluing the two prefabricated plates obtained in the S2.3 on two sides of the fiber mesh cloth to obtain a panel;
s3, preparing the honeycomb plate, namely grinding one side face of the panel to manufacture a rough surface, coating glue on the rough surface, covering two sides of the honeycomb substrate, and curing to obtain the honeycomb plate.
2. The method for producing a flame retardant polypropylene honeycomb panel according to claim 1, wherein in S1.4, the injection molding temperature is 200 to 220 ℃, the injection molding pressure is 0.4 to 0.6MPa, the holding pressure is 0.6 to 0.9MPa, and the holding time is 20S.
3. The method for preparing the flame-retardant polypropylene honeycomb panel according to claim 1, wherein in the step S1, the mass ratio of PP, leather buffing ash, glass fiber and calcium carbonate is as follows: 100:4-8:5-10:15-20.
4. The method for preparing a flame retardant polypropylene honeycomb panel according to claim 1, wherein in the step S2, the mass ratio of PP to leather ash is: 100:10-15.
5. The method for preparing a flame retardant polypropylene honeycomb panel according to claim 1, wherein the leather buffing ash is a leather buffing ash.
6. The method of claim 1, wherein the panel to honeycomb substrate height ratio is 1:10-15.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311672583.8A CN117465037A (en) | 2023-12-07 | 2023-12-07 | Preparation method of flame-retardant polypropylene honeycomb plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311672583.8A CN117465037A (en) | 2023-12-07 | 2023-12-07 | Preparation method of flame-retardant polypropylene honeycomb plate |
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| Publication Number | Publication Date |
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| CN117465037A true CN117465037A (en) | 2024-01-30 |
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|---|---|---|---|
| CN202311672583.8A Pending CN117465037A (en) | 2023-12-07 | 2023-12-07 | Preparation method of flame-retardant polypropylene honeycomb plate |
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| Country | Link |
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| CN (1) | CN117465037A (en) |
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- 2023-12-07 CN CN202311672583.8A patent/CN117465037A/en active Pending
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