CN112625436A - Notebook shell processing raw material and preparation method thereof - Google Patents

Notebook shell processing raw material and preparation method thereof Download PDF

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CN112625436A
CN112625436A CN202011320837.6A CN202011320837A CN112625436A CN 112625436 A CN112625436 A CN 112625436A CN 202011320837 A CN202011320837 A CN 202011320837A CN 112625436 A CN112625436 A CN 112625436A
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carbon fiber
raw material
parts
caprolactam
weight
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余生龙
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Anhui Victory Precision Manufactur Technology Co ltd
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Anhui Victory Precision Manufactur Technology Co ltd
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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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G69/00—Macromolecular compounds obtained by reactions forming a carboxylic amide link in the main chain of the macromolecule
    • C08G69/02—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids
    • C08G69/08—Polyamides derived from amino-carboxylic acids or from polyamines and polycarboxylic acids derived from amino-carboxylic acids
    • C08G69/14—Lactams
    • C08G69/16—Preparatory processes
    • 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
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/04—Reinforcing macromolecular compounds with loose or coherent fibrous material
    • C08J5/06—Reinforcing macromolecular compounds with loose or coherent fibrous material using pretreated fibrous materials
    • 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
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/06—Polyamides derived from polyamines and polycarboxylic acids
    • 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
    • C08J2477/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2477/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • 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
    • C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
    • C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
    • 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
    • C08K7/06—Elements
    • 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
    • C08K9/00—Use of pretreated ingredients
    • C08K9/02—Ingredients treated with inorganic substances

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Reinforced Plastic Materials (AREA)

Abstract

The invention provides a notebook shell processing raw material and a preparation method thereof, wherein the notebook shell processing raw material comprises the following components in parts by weight: 100 portions of PA66 resin material, 15 portions to 30 portions of caprolactam, 15 portions to 30 portions of carbon fiber material, 0.5 portion to 0.8 portion of antioxidant, 0.5 portion to 0.6 portion of ultraviolet absorbent, 1 portion to 2 portions of coupling agent, 0.1 portion to 0.2 portion of catalyst, 0.05 portion to 0.1 portion of cocatalyst and 2 portions to 3 portions of compatilizer. The preparation method comprises the steps of firstly dehydrating caprolactam, respectively adding the dehydrated caprolactam into an A, B activation kettle, adding a catalyst into an A activation kettle, and adding a cocatalyst into a B activation kettle to obtain a material A and a material B; uniformly mixing the material A and the material B according to the volume ratio of 1:1 to obtain a mixed solution; adding the mixed solution into the rest raw materials, mixing and plasticizing, adding into a feed inlet of an extruder for melting, carrying out reaction and solidification in a reaction die head, and carrying out traction, cooling and winding to obtain the composite material. The invention has the advantages of high tensile strength, wear resistance, corrosion resistance, creep resistance and the like, and is greatly improved.

Description

Notebook shell processing raw material and preparation method thereof
Technical Field
The invention belongs to the technical field of notebook shell processing and application, and particularly relates to a notebook shell processing raw material and a preparation method thereof.
Background
The notebook shell can protect the body most directly, and can reflect the design feeling and the aesthetic degree of the notebook computer most in appearance. The notebook shell is generally made of two materials, namely engineering plastics and alloy materials. The engineering plastic is adopted by most notebook computer manufacturers due to low cost, but has the defects of hard material, insufficient strength and toughness, heavy weight, poor heat-conducting property and the like. The aluminum-magnesium alloy shell is mostly adopted as the alloy material, and the aluminum-magnesium alloy has the advantages of being firm and light in mass, low in density, good in heat dissipation, strong in pressure resistance and the like, but has the defects of being not firm and wear-resistant, high in cost, difficult to form and the like.
In recent years, with the development of composite materials and carbon fiber technology, the technology of carbon fiber composite materials for notebook computer housings has also been actively developed.
Carbon fiber composite materials are an important branch of composite materials, and because of their excellent properties, the use and yield of such materials have been expanding in recent years. Carbon fiber reinforced composite materials have long been regarded as expensive materials, the price of which is about ten times that of glass fiber reinforced composite materials, and the carbon fiber reinforced composite materials are only used in advanced technical industries such as military industry, aerospace and the like. In recent years, carbon fibers have grown at a rate of 50% or more per year, and there are two important factors that have driven the development of carbon fiber reinforced composites. Firstly, the materials are continuously recognized deeply, so that the performance of the materials is gradually improved, the materials can reach the performance which is difficult to be compared with other materials, and the use amount of the materials is continuously increased. The second is the continuous reduction in cost to efficiency ratio, which is mainly attributed to the ability of the carbon fiber industry to provide high quality fibers and the continuous advancement of fiber/matrix fusion technology. The mass production of the carbon fiber improves the quality and reduces the price, and the improvement of the processing technology continuously increases the proportion of the carbon fiber added into the composite material, which can reach more than 60 percent of the volume proportion at present. All of these advances have led to an ever-expanding field of application for carbon fiber composites. Therefore, the application of the carbon fiber composite material is gradually expanded to the field of notebook computer shell materials.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a notebook shell processing raw material and a preparation method thereof.
A notebook shell processing raw material comprises the following components in parts by weight:
100-122 parts of matrix resin material, wherein the matrix resin material is PA66,
15-30 parts of caprolactam, 15-30 parts of carbon fiber materials,
0.5 to 0.8 portion of antioxidant,
0.5 to 0.6 portion of ultraviolet absorbent,
1-2 parts of coupling agent, 0.1-0.2 part of catalyst,
0.05-0.1 part of cocatalyst and 2-3 parts of compatilizer.
Furthermore, the antioxidant is antioxidant T501, the ultraviolet absorbent is phenyl o-hydroxybenzoate, the coupling agent is a silane coupling agent, and the compatilizer is maleic anhydride-styrene copolymer.
Further, the catalyst is NaOH, KOH or Na2CO3Or NaHCO3。
Further, the cocatalyst is Toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI), Hexamethylene Diisocyanate (HDI), isophorone diisocyanate (IPDI) or Triphenylmethane Triisocyanate (TTI).
A preparation method of the notebook shell processing raw material comprises the following steps:
(1) mixing 100 parts by weight of PA66, 15-30 parts by weight of carbon fiber material, 0.5-0.8 part by weight of antioxidant T501, 0.5-0.6 part by weight of phenyl o-hydroxybenzoate, 1-2 parts by weight of silane coupling agent and 2-3 parts by weight of maleic anhydride-styrene copolymer in a high-speed mixer for 5-10min, plasticizing after mixing, adding into a feed inlet of an extruder for melting;
(2) dehydrating caprolactam;
(3) preparation of caprolactam activated monomer: respectively adding the dehydrated caprolactam into an A, B activation kettle, adding a catalyst into an A activation kettle, and adding a cocatalyst into a B activation kettle to obtain a material A and a material B;
(4) preparation of PA 66/carbon fiber composite sheet: and (3) uniformly mixing the material A and the material B according to the volume ratio of 1:1 to obtain a mixed solution, continuously conveying the mixed solution and the molten material obtained in the step (1) to a reaction die head respectively for reaction and solidification, and obtaining the PA 66/carbon fiber composite sheet through traction, cooling and winding.
Furthermore, the reaction temperature in the A, B activation kettle is 110-160 ℃, the negative pressure is-0.05-0.1 MPa, and the reaction time is 20-40 min.
Further, the conveying amount of the mixed liquid in the step 4 is 0.5-5.0 kg/min, the curing reaction temperature is 140-200 ℃, and the curing reaction time is 2-10 min; the conveying capacity of the carbon fiber fabric is 0.5-12 kg/min, the traction speed is 1-4 m/min, and the retention time of materials in the reaction die head is 2-10 min.
Further, the carbon fiber fabric is plain weave or twill weave, the width of the fabric is 400-1600 mm, and the gram weight of the fabric is 200-2000 g/m2。
The continuous compression molding process comprises unreeling, drawing, preheating, mold pressing, cooling, trimming, cutting and packaging, wherein the drawing speed is 1-3 m/min, the preheating temperature is 140-180 ℃, the mold pressing temperature is 200-250 ℃, the mold pressing pressure is 1-5 MPa, the mold pressing time is 1-10 min, the cooling temperature is 60-100 ℃, and the cooling time is 2-10 min.
Compared with the prior art, the invention has the beneficial effects that: according to the invention, the viscosity of the caprolactam liquid is close to that of water, and the main component of the mixed liquid is the caprolactam liquid, so that the mixed liquid can quickly impregnate the carbon fiber fabric before solidification and quickly coat the carbon fibers in the carbon fiber fabric; then, the molecular weight of the mixed solution rapidly increases and is cured to form PA66 resin in the reaction die head along with the reaction, thereby realizing the seamless bonding between the PA66 resin and the carbon fiber fabric and fundamentally solving the problem that the nylon resin is difficult to completely impregnate and coat the carbon fiber; meanwhile, the carbon fiber fabric is used as a framework material of the composite material, and in the mould pressing process, due to the effect of interweaving nodes of the carbon fiber fabric, carbon fibers in the carbon fiber fabric cannot be unevenly dispersed due to the slippage phenomenon caused by the melting and flowing of PA66 resin caused by heating, so that the problem of unevenness of the carbon fiber reinforced continuous reaction molded nylon composite material is further avoided, and the mechanical property of the carbon fiber reinforced continuous reaction molded nylon composite material is effectively improved.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments.
The embodiment of the invention discloses a preparation method of a notebook shell processing raw material, which comprises the following steps:
(1) mixing 100 parts by weight of PA66, 15-30 parts by weight of carbon fiber material, 0.5-0.8 part by weight of antioxidant T501, 0.5-0.6 part by weight of phenyl o-hydroxybenzoate, 1-2 parts by weight of silane coupling agent and 2-3 parts by weight of maleic anhydride-styrene copolymer in a high-speed mixer for 5-10min, plasticizing after mixing, adding into a feed inlet of an extruder for melting;
(2) dehydrating caprolactam;
(3) preparation of caprolactam activated monomer: respectively adding the dehydrated caprolactam into an A, B activation kettle, adding a catalyst into an A activation kettle, and adding a cocatalyst into a B activation kettle to obtain a material A and a material B;
(4) preparation of PA 66/carbon fiber composite sheet: and (3) uniformly mixing the material A and the material B according to the volume ratio of 1:1 to obtain a mixed solution, continuously conveying the mixed solution and the molten material obtained in the step (1) to a reaction die head respectively for reaction and solidification, and obtaining the PA 66/carbon fiber composite sheet through traction, cooling and winding.
Detailed description of the preferred embodiment
Step 1, pretreating 15kg of carbon fibers to remove surface impurities; firstly, washing carbon fibers by absolute ethyl alcohol to remove surface impurities; then, preparing a mixed solution with the mass fraction of 35% by using nitric acid with the mass fraction of 35%, sodium nitrate with the mass fraction of 35% and deionized water, soaking the carbon fiber in the mixed solution for 2-3h, taking out, cleaning with an alkaline solution and deionized water until the pH value is not acidic, and drying for later use.
120kg of PA66, 15kg of treated carbon fiber, 0.5kg of antioxidant T501, 0.5kg of phenyl o-hydroxybenzoate, 1kg of silane coupling agent and 3kg of maleic anhydride-styrene copolymer are mixed in a high-speed mixer for 5-10min, plasticized after mixing, and added into a feeding port of an extruder for melting.
And step 2, dehydrating caprolactam.
Weighing 30kg of solid caprolactam, adding the solid caprolactam into a dehydration kettle, heating to 90 ℃, starting a vacuum pump after the caprolactam is completely melted, and dehydrating for 10min under the negative pressure of-0.02 MPa in the dehydration kettle.
And 3, preparing a caprolactam activated monomer.
Respectively feeding the dehydrated caprolactam liquid into A, B activation kettles by a metering pump for 15kg respectively, adding 200g of NaOH into the kettle A, adding 400g of Toluene Diisocyanate (TDI) into the kettle B, heating the kettle A to 140 ℃, reacting for 30min, observing that a sight glass of a condenser does not drip, finishing the reaction to obtain a material A, and preserving heat for later use; heating the kettle B to 160 ℃, reacting for 25min, finishing the reaction when no water drops on a sight glass of the condenser to obtain a material B, and cooling to 140 ℃ for heat preservation for later use.
And 4, preparing the PA 66/carbon fiber composite material.
Heating the reaction forming mould to 160 ℃, and filling a proper amount of N into the mould2. Feeding the obtained material A and the material B into a high-speed mixer according to the volume ratio of 1:1 at 500g/min, mixing, and adding the mixture into a reaction die head from the lower part of the reaction die head; taking carbon fiber twill fabric with the width of 500mm and the gram weight of 1kg/m2After heat treatment at 350 ℃, the mixture enters a reaction die head at the traction speed of 2m/min, and the residence time in the reaction die head is 3min, namely the reaction is finished; and (3) pulling the material out of the reaction die head, performing hot rolling and pressing on the material, cooling and shaping the material, and winding the material into a coil to obtain the PA 66/carbon fiber composite material.
Detailed description of the invention
Step 1, pretreating 30kg of carbon fiber to remove surface impurities; firstly, washing carbon fibers by absolute ethyl alcohol to remove surface impurities; then, preparing a mixed solution with the mass fraction of 35% by using nitric acid with the mass fraction of 35%, sodium nitrate with the mass fraction of 35% and deionized water, soaking the carbon fiber in the mixed solution for 2-3h, taking out, cleaning with an alkaline solution and deionized water until the pH value is not acidic, and drying for later use.
100kg of PA66, 30kg of the treated carbon fiber, 0.65kg of antioxidant T501, 0.5kg of phenyl o-hydroxybenzoate, 1kg of silane coupling agent and 2kg of maleic anhydride-styrene copolymer are mixed in a high-speed mixer for 5-10min, plasticized after mixing, and added into a feeding port of an extruder for melting.
And 2, weighing 20kg of solid caprolactam, adding the solid caprolactam into a dehydration kettle, heating to 90 ℃, starting a vacuum pump after the caprolactam is completely melted, and dehydrating for 10min under the negative pressure of-0.02 MPa in the dehydration kettle.
And 3, preparing a caprolactam activated monomer.
Respectively feeding the dehydrated caprolactam liquid into A, B activation kettles by a metering pump for 10kg respectively, adding 100g of NaOH into the kettle A, adding 200g of Hexamethylene Diisocyanate (HDI) into the kettle B, heating the kettle A to 145 ℃, reacting for 30min, observing that when a condenser sight glass does not drip, finishing the reaction to obtain a material A, and preserving heat for later use; heating the kettle B to 160 ℃, reacting for 25min, finishing the reaction when no water drops on a sight glass of the condenser to obtain a material B, and cooling to 140 ℃ for heat preservation for later use.
And 4, preparing the PA 66/carbon fiber composite material.
Heating the reaction forming mould to 160 ℃, and filling a proper amount of N into the mould2. Feeding the obtained material A and the material B into a high-speed mixer according to the volume ratio of 1:1 at 1000g/min, mixing, and adding the mixture into a reaction die head from the lower part of the reaction die head; taking carbon fiber twill fabric with the width of 500mm and the gram weight of 1kg/m2After heat treatment at 350 ℃, the mixture enters a reaction die head at the traction speed of 2m/min, and the residence time in the reaction die head is 3min, namely the reaction is finished; will be provided withAnd (3) pulling the material out of the reaction die head, performing hot rolling and pressing on the material, cooling and shaping the material, and winding the material into a coil to obtain the PA 66/carbon fiber composite material.
Detailed description of the preferred embodiment
Step 1, pretreating 12kg of carbon fibers to remove surface impurities; firstly, washing carbon fibers by absolute ethyl alcohol to remove surface impurities; then, preparing a mixed solution with the mass fraction of 35% by using nitric acid with the mass fraction of 35%, sodium nitrate with the mass fraction of 35% and deionized water, soaking the carbon fiber in the mixed solution for 2-3h, taking out, cleaning with an alkaline solution and deionized water until the pH value is not acidic, and drying for later use.
110kg of PA66, 12kg of treated carbon fiber, 0.55kg of antioxidant T501, 0.5kg of phenyl o-hydroxybenzoate, 1kg of silane coupling agent and 2kg of maleic anhydride-styrene copolymer are mixed in a high-speed mixer for 5-10min, plasticized after mixing, and added into a feeding port of an extruder for melting.
And step 2, dehydrating caprolactam.
Weighing 30kg of solid caprolactam, adding the solid caprolactam into a dehydration kettle, heating to 90 ℃, starting a vacuum pump after the caprolactam is completely melted, and dehydrating for 10min under the negative pressure of-0.02 MPa in the dehydration kettle.
And 3, preparing a caprolactam activated monomer.
Respectively feeding the dehydrated caprolactam liquid into A, B activation kettles by a metering pump for 15kg respectively, adding 150g of NaOH into the kettle A, adding 200g of Toluene Diisocyanate (TDI) into the kettle B, heating the kettle A to 140 ℃, reacting for 30min, observing that a sight glass of a condenser does not drip, finishing the reaction to obtain a material A, and preserving heat for later use; heating the kettle B to 160 ℃, reacting for 25min, finishing the reaction when no water drops on a sight glass of the condenser to obtain a material B, and cooling to 140 ℃ for heat preservation for later use.
And 4, preparing the PA 66/carbon fiber composite material.
Heating the reaction forming mould to 160 ℃, and filling a proper amount of N into the mould2. Feeding the obtained material A and the material B into a high-speed mixer according to the volume ratio of 1:1 at 1000g/min, mixing, and adding the mixture into a reaction die head from the lower part of the reaction die head; taking carbon fiber twillThe width of the fabric is 500mm, and the gram weight is 1kg/m2After heat treatment at 350 ℃, the mixture enters a reaction die head at the traction speed of 2m/min, and the residence time in the reaction die head is 3min, namely the reaction is finished; and (3) pulling the material out of the reaction die head, performing hot rolling and pressing on the material, cooling and shaping the material, and winding the material into a coil to obtain the PA 66/carbon fiber composite material.
The mechanical properties of the composite materials in the first to third examples are shown in the table below.
TABLE 1 mechanical Properties of carbon fiber reinforced PA66 composites
Figure BDA0002792835640000071
Figure BDA0002792835640000081
The foregoing is merely exemplary and illustrative of the present invention and various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the scope of the present invention as defined in the accompanying claims.

Claims (9)

1. The notebook shell processing raw material is characterized by comprising the following components in parts by weight:
100-122 parts of matrix resin material, wherein the matrix resin material is PA 66;
15-30 parts of caprolactam and 15-30 parts of carbon fiber materials;
0.5-0.8 part of antioxidant;
0.5-0.6 part of ultraviolet absorbent;
1-2 parts of coupling agent and 0.1-0.2 part of catalyst;
0.05-0.1 part of cocatalyst and 2-3 parts of compatilizer.
2. The notebook shell processing raw material of claim 1, wherein the antioxidant is antioxidant T501, the ultraviolet absorber is phenyl o-hydroxybenzoate, the coupling agent is a silane coupling agent, and the compatibilizer is maleic anhydride-styrene copolymer.
3. The notebook housing processing raw material of claim 1, wherein the catalyst is NaOH, KOH, Na2CO3Or NaHCO3。
4. The notebook housing processing raw material of claim 1, wherein the cocatalyst is Toluene Diisocyanate (TDI), diphenylmethane diisocyanate (MDI), Hexamethylene Diisocyanate (HDI), isophorone diisocyanate (IPDI), or Triphenylmethane Triisocyanate (TTI).
5. A method for preparing the notebook shell processing raw material as claimed in claim 1, comprising the steps of:
(1) mixing 100 parts by weight of PA66, 15-30 parts by weight of carbon fiber material, 0.5-0.8 part by weight of antioxidant T501, 0.5-0.6 part by weight of phenyl o-hydroxybenzoate, 1-2 parts by weight of silane coupling agent and 2-3 parts by weight of maleic anhydride-styrene copolymer in a high-speed mixer for 5-10min, plasticizing after mixing, adding into a feed inlet of an extruder for melting;
(2) dehydrating caprolactam;
(3) preparation of caprolactam activated monomer: respectively adding the dehydrated caprolactam into an A, B activation kettle, adding a catalyst into an A activation kettle, and adding a cocatalyst into a B activation kettle to obtain a material A and a material B;
(4) preparation of PA 66/carbon fiber composite sheet: and (3) uniformly mixing the material A and the material B according to the volume ratio of 1:1 to obtain a mixed solution, continuously conveying the mixed solution and the molten material obtained in the step (1) to a reaction die head respectively for reaction and solidification, and obtaining the PA 66/carbon fiber composite sheet through traction, cooling and winding.
6. The preparation method of the notebook shell processing raw material as claimed in claim 5, wherein the reaction temperature in the A, B activation kettle is 110-160 ℃, the negative pressure is-0.05-0.1 MPa, and the reaction time is 20-40 min.
7. The method for preparing a notebook shell processing raw material according to claim 5, wherein the conveying amount of the mixed solution in the step 4 is 0.5 to 5.0kg/min, the curing reaction temperature is 140 to 200 ℃, and the curing reaction time is 2 to 10 min; the conveying capacity of the carbon fiber fabric is 0.5-12 kg/min, the traction speed is 1-4 m/min, and the retention time of materials in the reaction die head is 2-10 min.
8. The method for preparing the raw material for processing the notebook shell according to claim 5, wherein the carbon fiber fabric is plain or twill fabric, the width of the fabric is 400-1600 mm, and the gram weight of the fabric is 200-2000 g/m2。
9. The preparation method of the notebook shell processing raw material according to claim 5, further comprising the step of carrying out continuous compression molding on the PA 6/carbon fiber composite sheet to obtain a composite board, wherein the continuous compression molding process comprises unreeling, traction, preheating, mold pressing, cooling, edge cutting, cutting and packaging, wherein the traction speed is 1-3 m/min, the preheating temperature is 140-180 ℃, the mold pressing temperature is 200-250 ℃, the mold pressing pressure is 1-5 MPa, the mold pressing time is 1-10 min, the cooling temperature is 60-100 ℃, and the cooling time is 2-10 min.
CN202011320837.6A 2020-11-23 2020-11-23 Notebook shell processing raw material and preparation method thereof Withdrawn CN112625436A (en)

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CN111378186A (en) * 2019-12-04 2020-07-07 安徽旭升新材料有限公司 Carbon fiber reinforced PA66 composite material for notebook shell and processing method thereof

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黄锐, 机械工业出版社 *

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Application publication date: 20210409