CN106146830A - A kind of multilamellar modified cast nylon material - Google Patents

Abstract

The invention relates to a multi-layer modified cast nylon material, which comprises at least two layers of a wear-resistant layer, a toughened layer and a reinforced layer; the material of the wear-resistant layer is wear-resistant cast nylon; the toughened layer The material is toughened cast nylon; the material of the reinforcement layer is reinforced cast nylon. The multi-layer modified cast nylon material has different performances at different levels, and can meet the requirements of different performances at different usage positions of parts.

Description

A multi-layer modified cast nylon material

technical field

The invention relates to the field of polymer materials, in particular to a multilayer modified cast nylon material and a preparation method thereof.

Background technique

With the development of the chemical industry and the mechanical industry, the use of nylon and other engineering plastics in national construction production is increasing, and some key metal parts are gradually replaced by low-density, high-performance, low-price nylon material parts, making the performance of the product Improvement, weight and cost are greatly reduced, thus promoting the rapid development of "replacing steel with plastic".

Cast nylon, also known as MC nylon or monomer cast nylon, the English name is MonomerCast Nylon. Casting nylon is a process in which the melted caprolactam monomer is used as a catalyst with an alkaline substance, together with an activator and other additives to make a monomer to be polymerized, and it is directly injected into a preheated mold, and the material is rapidly polymerized in the mold. A nylon material. Through rapid polymerization, the molecular weight of cast nylon is greatly increased compared with ordinary nylon, which reduces defects and improves the performance of nylon materials.

With the development and progress of industrial technology, people have higher and higher requirements for the performance of cast nylon. For example, it is required to have good wear resistance, strength, toughness, aging resistance, heat resistance, dimensional stability, etc. Pure cast nylon with single performance has been difficult to meet the requirements of current industrial technology.

In order to improve the performance of cast nylon, people have carried out a variety of modification treatments on cast nylon, such as adding fillers to improve a certain performance of cast nylon. By adding friction-reducing and wear _- resistant solid particle lubricants (graphite, MoS2, etc.), the friction coefficient of cast nylon can be reduced and its wear resistance can be improved; by adding various fibers (carbon fiber, glass fiber, etc.), the cast nylon can be improved. Strength; by adding nano-compound particles (nano-Al ₂ O ₃ , nano-TiO ₂ , etc.) or elastomers (PP, SBS, etc.), the impact toughness of cast nylon can be improved.

However, when using the above method to improve a certain property of cast nylon, it may lead to the decline of other properties. For example, when adding granular lubricants to improve anti-friction and anti-wear properties, it may lead to a decrease in the toughness of the material. When adding glass fibers to increase the strength of the material, it may also lead to a decrease in the toughness of the material.

Adding multiple fillers to cast nylon at the same time may improve several properties. However, the more fillers are added, the more complex the material system and the more difficult the design will be, which will not only increase the cost, but may also reduce the performance stability and reliability of the material.

Contents of the invention

For one or more problems existing in the prior art, an object of the present invention is to provide a kind of multi-layer modified cast nylon material, another object of the present invention is to provide a kind of by above-mentioned multi-layer modified cast nylon material Another object of the present invention is to provide a method for preparing the above-mentioned multi-layer modified cast nylon material.

To this end, the first aspect of the present invention provides a multilayer modified cast nylon material, which includes at least two layers selected from a wear-resistant layer, a toughening layer and a reinforced layer, and the material of the wear-resistant layer is wear-resistant cast Nylon, the material of the toughened layer is toughened cast nylon, and the material of the reinforced layer is reinforced cast nylon;

Preferably, the wear-resistant cast nylon, toughened cast nylon, and reinforced cast nylon are each independently prepared by modifying cast nylon with one or more of the following modification methods: copolymerization modification, blending Modification, filling modification, chemical modification;

Preferably, the wear-resistant layer, toughening layer or reinforcing layer is compounded by layer-by-layer casting (such as layer-by-layer centrifugal casting);

Preferably, each layer of the multi-layer cast nylon material is a wear-resistant layer and a reinforced layer, or a wear-resistant layer and a toughened layer, or a wear-resistant layer, a reinforced layer and a toughened layer in sequence.

The multi-layer modified cast nylon material can be freely combined with various modified layers according to the performance and application requirements, such as the combination of "wear-resistant layer + reinforced layer" applied to high-load and high-wear-resistant parts, "wear-resistant layer + The combination of "toughening layer" is applied to elastic sealing wear-resistant parts and shock-absorbing wear-resistant parts, and the combination of "wear-resistant layer + toughening layer + reinforcement layer" is applied to parts with internal wear resistance, external high strength, and core toughness.

In one embodiment, the multi-layer modified cast nylon material according to any one of the foregoing inventions, wherein the wear-resistant cast nylon contains (for example, is filled with) a wear-resistant modifier,

Preferably, the wear-resistant modifier is a solid lubricant and/or a liquid lubricant;

_The solid lubricant can be graphite particles and/or MoS particles;

The liquid lubricant can be one or more selected from base oil, mineral oil, lubricating oil and grease (such as selected from polyglycol ether base grease, perfluoroether base grease, polyethylene One or more of glycol grease and polyolefin base grease).

In a specific embodiment, the wear-resistant cast nylon of the present invention has one or more of the following performance indicators:

a) Abrasion amount ≤ 4mg, preferably ≤ 3mg, more preferably ≤ 2mg;

b) friction coefficient ≤ 0.5, preferably ≤ 0.4, more preferably ≤ 0.3.

In a specific embodiment, the abrasion resistant cast nylon of the present invention is made from caprolactam, a catalyst, an activator and an abrasion resistant modifier. Wherein the mass ratio of caprolactam and wear-resistant modifier is preferably 100:3-15.

In one embodiment, the multi-layer modified cast nylon material according to any one of the foregoing inventions, the reinforced cast nylon contains (for example, is filled with) a reinforcing modifier,

The reinforcing modifier is preferably fibers and/or whiskers, the diameter of the fibers or whiskers is preferably 1-4 μm, and the length is preferably 50-200 μm;

Preferably, the fibers are selected from one or more of carbon fibers, glass fibers and carbon nanotubes;

Preferably, the whiskers are selected from organic whiskers and/or inorganic whiskers, for example from cellulose whiskers, poly-4-hydroxybenzoate whiskers, polybutylacrylate-styrene whiskers, graphite whiskers and poly One or more of potassium titanate whiskers;

Preferably, the reinforcement modifier is treated with a surface treatment agent, and the surface treatment agent may be selected from one or more of silane coupling agents, titanate coupling agents and aluminate coupling agents.

In a specific embodiment, the reinforced cast nylon described in the present invention has one or more of the following performance indicators:

c) Tensile strength ≥ 70MPa, preferably ≥ 90MPa, more preferably ≥ 110MPa;

d) Bending strength ≥ 90MPa, preferably ≥ 110MPa, more preferably ≥ 130MPa;

e) Compressive strength ≥ 80 MPa, preferably ≥ 100 MPa, more preferably ≥ 120 MPa.

In a specific embodiment, the reinforced cast nylon of the present invention is made from caprolactam, a catalyst, an activator, and a reinforcement modifier. Wherein the mass ratio of caprolactam to reinforcing modifier is preferably 100:10-20.

In one embodiment, the multi-layer modified cast nylon material according to any one of the foregoing inventions, wherein the toughened cast nylon contains (for example, is filled with) a toughening modifier,

The toughening modifier is preferably nanoparticles and/or elastomers, the particle size of the nanoparticles is preferably 20-50 nm, and the particle size of the elastomer is preferably 0.2-0.5 μm;

Preferably, the nanoparticles are selected from one or more of nano-Al ₂ O ₃ , nano-TiO ₂ , nano-SiO ₂ , nano-zirconia and nano-calcium carbonate;

Preferably, the nano-zirconia or nano-calcium carbonate is nano-zirconia or nano-calcium carbonate modified by titanate, and the amount of the titanate is preferably 0.5% to 0.5% of the weight of nano-zirconia or nano-calcium carbonate. 3% (eg 2.5%);

Preferably, the elastomer is preferably a thermoplastic elastomer, such as one or more selected from PP, POE, POE-g-GMA, EVA, EVA-g-MAH, EPDM, SBS and EPR.

In a specific embodiment, the toughened cast nylon described in the present invention has one or more of the following performance indicators:

f) elongation at break ≥ 20%, preferably ≥ 40%, more preferably ≥ 60%;

g) Impact strength ≥ 10KJ/m ² , preferably ≥ 12KJ/m ² , preferably ≥ 14KJ/m ² .

In a specific embodiment, the toughened cast nylon of the present invention is made from caprolactam, a catalyst, an activator, and a toughening modifier. Wherein the mass ratio of caprolactam and toughening modifier is preferably 100:10-20.

In a preferred embodiment, the multi-layer modified cast nylon material according to any one of the foregoing inventions, wherein the mass ratio of caprolactam, catalyst and activator is preferably 100:0.2-0.5:0.2-0.5.

Preferably, the catalyst is an alkaline substance, preferably one or more selected from alkali metals, alkaline earth metals, metal oxides or derivatives, more preferably selected from one or more of NaOH, KOH, sodium ethylate, sodium methylate Various.

Preferably, the activator is selected from isocyanate, preferably selected from one or more of aromatic isocyanate or aliphatic isocyanate, more preferably selected from toluene diisocyanate (TDI) or isophorone diisocyanate (IPDI) one or more of .

In a preferred embodiment, the reinforced cast nylon, toughened cast nylon or wear-resistant cast nylon described in the present invention may also contain a compatibilizer respectively. The compatibilizer can make the modifier better dispersed in the nylon material. Preferably, the compatibilizer can be a graft copolymer of rubber-plastic elastomer, such as POE-g-MAH, SEBS-g-MAH, POE-g-GMA, EPDM-g-MAH, etc. During the preparation, adding a compatibilizer as needed can make the modifier better dispersed in the nylon material.

In one embodiment, the multi-layer modified cast nylon material of any one of the foregoing inventions, wherein the preparation method of wear-resistant cast nylon, toughened cast nylon or reinforced cast nylon is:

1) Add catalyst to molten caprolactam, stir and dehydrate;

2) as required, add one or more modifiers selected from wear-resistant modifiers, reinforcing modifiers and toughening modifiers, optionally, add a compatibilizer while adding the modifier , stir and heat, continue dehydration,

3) Adding an activator, and then casting to obtain.

Preferably, in step 1), the molten caprolactam is heated to 125±5°C, a catalyst is added, stirred and dehydrated for 30-45 minutes;

Preferably, in step 2), the stirring and heating temperature is 135±5°C;

Preferably, in step 3, during casting, the mold is preheated to 170±5°C before casting; preferably, after the casting is completed, heat-preservation polymerization is carried out, and the heat-holding temperature is preferably 130-150°C, such as 140±5°C, The holding time is preferably 60 to 120 minutes.

In one embodiment, the multi-layer modified cast nylon material according to any one of the foregoing inventions, wherein the thickness of the wear-resistant layer, reinforcing layer or toughening layer is 10-50 mm,

Preferably, in the multi-layer modified cast nylon material, by weight, the wear-resistant layer is 20-30 parts, the reinforcing layer is 20-40 parts, and the toughening layer is 40-50 parts.

A second aspect of the present invention provides a part made of the multi-layer modified cast nylon material according to any one of the preceding claims of the present invention. The parts described are preferably transmission shafts, flanges, bushes, bushings, pipes, pulleys (such as two-phase pulleys), sliders, slideways, multi-layer modified cast nylon plates, multi-layer modified cast nylon rods Or multi-layer modified cast nylon tube.

The dual-phase pulley is a pulley made of two material phases, such as a metal-nylon dual-phase pulley, which is composed of a metal phase and a nylon phase, wherein the nylon phase can be the multi-layer modified cast nylon of any one of the foregoing inventions. .

Preferably, the inner layer of the bush is a wear-resistant layer, the middle layer is a reinforcing layer, and the outer layer is a toughening layer.

Preferably, the inner layer of the pipe is a wear-resistant layer, and the outer layer is a reinforcing layer or a toughening layer.

Preferably, the main part of the sleeve, pulley or slider includes a reinforcement layer and/or a toughening layer, and at least part of the surface is a wear-resistant layer.

Preferably, the main part of the flange includes a reinforcement layer and/or a toughening layer, and the sealing surface is a wear-resistant layer.

Preferably, the core layer of the multi-layer modified cast nylon rod is a toughening layer, the middle layer is a reinforcing layer, and the outer layer is a wear-resistant layer.

Preferably, each layer of the multi-layer modified cast nylon plate is a wear-resistant layer, a reinforcing layer and a toughening layer in sequence.

Preferably, the inner layer of the multi-layer modified cast nylon pipe is a wear-resistant layer, the middle layer is a reinforcing layer, and the outer layer is a toughening layer.

The third aspect of the present invention provides a method for preparing the multi-layer modified cast nylon material of any one of the present invention, the method is that the wear-resistant layer, the toughening layer or the reinforcement layer are cast layer by layer (such as layer by layer) as required Centrifugal casting) method composite molding.

In one embodiment, the method of the third aspect of the present invention includes pouring the monomers to be polymerized of wear-resistant cast nylon, toughened cast nylon or reinforced cast nylon into the mold layer by layer as required;

Preferably, the monomers to be polymerized include molten caprolactam, catalysts, activators and corresponding modifiers;

Preferably, the interval between pouring each monomer to be polymerized into the mold is 1-3 minutes.

Preferably, after all the monomers to be polymerized are poured into the mold, heat-preservation polymerization is carried out. The heat-preservation temperature is preferably 130-150° C., for example, 140±5° C., and the heat-retaining time is preferably 60-120 minutes.

Unless otherwise specified, all parts in the present invention are parts by weight, and percentages are percentages by weight.

Unless otherwise specified, the ordinary cast nylon in the present invention refers to cast nylon without any modifier added.

In the present invention, unless otherwise specified, the English abbreviations of substances have meanings known in the art. Preferably, the English abbreviations in the present invention may have full English names or Chinese names as shown in Table 1.

Table 1

Beneficial effects of the present invention

Compared with the single-modified cast nylon material, the multi-layer modified cast nylon of the present invention has several improved properties. Compared with the cast nylon modified by adding multiple fillers at the same time, the multi-layer nylon material of the present invention not only has multiple improved properties, but also has different properties at different levels, which can meet the different performance requirements of different use positions of parts. Since the phase structure of each layer of the nylon material of the present invention is relatively simple, and the modified filler used is relatively small, the performance of the multi-layer modified cast nylon of the present invention is also more stable and the cost is also lower.

Compared with the traditional multi-layer nylon material that adopts extrusion injection molding process, multiple casting and multiple molding, the nylon material of the present invention adopts monomer anion polymerization casting process, and is continuously cast and formed at one time. Compared with the two, the molecular weight and density of the nylon material of the present invention are higher, and the mechanical properties are also better; the matrix of each nylon layer is obtained by the anionic polymerization reaction of lactam monomer, and the anion of caprolactam monomer can also be passed between each nylon layer. The polymerization reaction is combined, so the interfacial bonding performance of each layer of the nylon material of the present invention is better. Moreover, the preparation method of the one-time continuous casting molding of the nylon material of the present invention is simple and practical, and easy to realize.

The multi-layer modified cast nylon material of the invention can be prepared into various mechanical parts. Moreover, it is also possible to flexibly design the type, number of layers or sequence of wear-resistant layers, toughening layers or reinforcement layers according to different shapes, sizes, uses, use environments, and use requirements of parts, and design corresponding parts in different use positions. Modified nylon layer for optimum performance, resulting in low-cost, high-performance, highly targeted nylon parts.

When part of the surface layer of the part requires high friction and wear performance, part of the surface layer requires high toughness, and the core part requires high strength, the wear-resistant layer, toughening layer and reinforcing layer provided by the multi-layer modified cast nylon material of the present invention can all meet the needs of different parts. The performance requirements of the location.

In one embodiment, the properties of the nylon layers of the present invention are shown in Table 1.

Table 1 Performance of each layer of nylon of the present invention

More specifically, the multi-layer modified cast nylon material of the present invention can be used to manufacture shock-absorbing and wear-resistant bushings that require high wear resistance in the inner layer, high strength in the middle layer, and high toughness in the outer layer; Abrasive, one side requires shock absorption and high toughness flanges; it can be used to manufacture wear-resistant nylon pipes that require high wear resistance on the inner layer and high pressure resistance on the outer layer; it can be used to manufacture high wear resistance on one side and high load on the other side Wear-resistant sleeves such as wear-resistant slides, duplex pulleys and sliders and other mechanical parts.

To sum up, the matrix material of each layer of the multi-layer modified cast nylon material provided by the present invention is cast nylon, and each layer of the material is compounded by continuous casting and one-time molding. While the material has many improved properties, it has higher molecular weight and density, better mechanical properties, strong interfacial bonding, less modifier, low cost, strong designability, and good performance stability. At the same time, the nylon material is formed by one-time continuous casting, and the process technology is simple and practical, and easy to realize.

Description of drawings

The accompanying drawings described here are used to provide a further understanding of the present invention and constitute a part of the application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations to the present invention. In the attached picture:

Figure 1 is a cross-sectional view of a multilayer modified cast nylon sheet.

Figure 2 is a cross-sectional view of a multilayer modified cast nylon rod.

detailed description

The technical solutions of the present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

Embodiment 1 (wear-resistant layer 20% by weight+reinforcing layer 40% by weight+toughening layer 40% by weight):

(1) Weigh 320kg of the caprolactam raw material, add it to the melting tank, and heat it until it melts completely.

(2) Raise the temperature to 125°C, add 0.9kg of sodium methoxide, turn on the stirring device, turn on the dehydration device, dehydrate for 40 minutes until complete dehydration, and obtain activated caprolactam.

(3) Transfer 64kg of activated caprolactam to 1# reaction tank, add 5.12kg of polyethylene glycol lubricating grease, continue dehydration, stir and heat to 140°C.

(4) Transfer 128kg of activated caprolactam to 2# reaction tank, add 19.2kg of poly(butyl acrylate-styrene) whiskers, continue dehydration, stir and heat to 140°C.

(5) Transfer 128kg of activated caprolactam to 3# reaction tank, add 19.2kg of EVA-g-MAH, continue dehydration, stir and heat to 140°C.

(6) Add 0.32kg of toluene diisocyanate (TDI) to the 1# melt, and quickly cast it into a mold preheated at 170°C; after 1 to 3 minutes, add 0.64kg of activator toluene diisocyanate to the 2# melt (TDI), quickly cast into the above-mentioned mold; after 1-3 minutes, add 0.64kg of activator toluene diisocyanate (TDI) to the 3# melt, quickly cast into the above-mentioned mold, and cast accordingly until the casting is completed.

(5) The mold is kept at 145°C for 120min to complete the polymerization reaction, and the mold is demoulded to obtain a multi-layer modified cast nylon material composite material of 20% by weight of the wear-resistant layer + 40% by weight of the reinforced layer + 40% by weight of the toughening layer. Item performance parameters are shown in Table 2.

Table 2 The properties of each layer of the multi-layer modified cast nylon material in Example 2

Test items wear layer enhancement layer toughening layer Test accuracy Tensile strength MPa 72 110 80 GB/T1040.2/1A-2006 Bending strength MPa 86 130 96 GB/T9341-2008

Compressive strength MPa 85 115 85 GB/T1041-2008 Elongation at break% 16 18 68 GB/T1040.2/1A-2006 Impact strength KJ/m ² 8 8.5 15 GB/T1043.1/1-2008 Static friction coefficient (dry state) 0.15 0.39 0.48 GB/T3960-1983 Abrasion (2h) mg 2.0 3.2 3.4 GB/T3960-1983

Embodiment 2 (wear-resistant layer 30% by weight+toughening layer 20% by weight+reinforcing layer 50% by weight):

(1) Weigh 100kg of the caprolactam raw material, add it into the melting tank, and heat it until it is completely melted.

(2) Raise the temperature to 120°C, add 0.4kg of sodium methoxide, turn on the stirring device, turn on the dehydration device, dehydrate for 30 minutes until complete dehydration, and obtain activated caprolactam.

(3) Transfer 50kg of activated caprolactam to 1# reaction tank, add 5kg of polypotassium titanate whiskers, continue dehydration, stir and heat to 135°C.

(4) Transfer 20kg of activated caprolactam to 2# reaction tank, add 2kg of EVA-g-MAH, continue dehydration, stir and heat to 135°C.

(5) Transfer 30kg of activated caprolactam to 3# reaction tank, add 1.5kg of polyolefin basic lubricating grease, continue dehydration, stir and heat to 135°C.

(6) Add 0.15kg of toluene diisocyanate (TDI) to the 1# melt, and quickly cast it into a mold preheated at 170°C; after 1 to 3 minutes, add 0.08kg of activator toluene diisocyanate to the 2# melt (TDI), quickly cast into the above-mentioned mold; after 1-3 minutes, add 0.1kg of activator to the 3# melt, quickly cast into the above-mentioned mold, and cast accordingly until the casting is completed.

(5) The mold is kept at 140° C. for 60 minutes to complete the polymerization reaction, and the multi-layer modified cast nylon material composite material of 30% by weight of the wear-resistant layer + 20% by weight of the toughening layer + 50% by weight of the reinforcement layer is obtained after demoulding. Item performance parameters are shown in Table 3.

Table 3 The performance of each layer of nylon in Example 3

Example 3

Embodiment 3 provides a multi-layer modified cast nylon plate, which is made of the multi-layer modified cast nylon of the present invention. Fig. 1 shows a cross-sectional view of the nylon board. As shown in Fig. 1, each layer of the multilayer nylon board is a toughening layer 1, a reinforcing layer 2 and a wear-resistant layer 3 in sequence.

The middle layer of the multi-layer nylon board is a reinforcement layer 2, which has high mechanical strength, one side surface layer is a toughening layer 1, which has high impact resistance, and the other side surface layer is a wear-resistant layer 3, which has High anti-wear properties. The multi-layer modified composite nylon board has a reinforced matrix, one side is wear-resistant, and the other side is impact-resistant, and can be applied to various complicated working environments.

Example 4

Embodiment 4 provides a multi-layer modified cast nylon rod, which is made from the multi-layer modified cast nylon of the present invention. The multi-layer modified cast nylon rod described in this embodiment can be obtained by layer-by-layer centrifugal casting. First, the outermost layer is poured, then layer by layer, and finally the core is poured. Fig. 2 shows a cross-sectional view of the multilayer nylon rod. As shown in Fig. 2, the layers of the multilayer nylon rod from the inside to the outside are the toughening layer 1, the reinforcing layer 2 and the wear-resistant layer 3 in sequence.

The core layer of the multilayer nylon rod is a toughening layer 1 with high toughness, the middle layer is a reinforcement layer 2 with high mechanical strength, and the surface layer is a wear-resistant layer 3 with high wear resistance. The multi-layer nylon rod has a toughened matrix, a reinforced middle layer and a wear-resistant surface layer, which can be applied to a variety of complex working environments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: the present invention can still be Modifications to the specific implementation of the invention or equivalent replacement of some technical features; without departing from the spirit of the technical solution of the present invention, should be included in the scope of the technical solution claimed in the present invention.

Claims (18)

1. a multilamellar modified cast nylon material, it include selected from wearing layer, toughening layer and At least two-layer in enhancement layer, the material of described wearing layer is wear-resisting nylon monomer-cast nylon, described toughness reinforcing The material of layer is toughness reinforcing nylon monomer-cast nylon, and the material of described enhancement layer is for strengthening nylon monomer-cast nylon.

2. according to the multilamellar modified cast nylon material of right 1, wherein said wear-resisting casting Buddhist nun Nylon monomer-cast nylon imperial, toughness reinforcing, enhancing nylon monomer-cast nylon are independently of one another by selected from following method of modifying In one or more be modified preparing to nylon monomer-cast nylon: modification by copolymerization, blending and modifying, Filling-modified, chemical modification.

3. according to the multilamellar modified cast nylon material of right 1 or 2, wherein said wearing layer, It is combined by the method for successively casting (the most successively spun casting) between toughening layer or enhancement layer.

4. according to the multilamellar modified cast nylon material of any one of right 1 to 3, wherein said Each layer of multilamellar nylon monomer-cast nylon material is followed successively by wearing layer and enhancement layer, or is followed successively by wearing layer And toughening layer, or it is followed successively by wearing layer, enhancement layer and toughening layer.

5. according to the multilamellar modified cast nylon material of any one of right 1 to 4, described wear-resisting Containing (being such as filled with) abrasion resistance modifier in nylon monomer-cast nylon,

Preferably, described abrasion resistance modifier is kollag and/or fluid lubricant；

Preferably, described kollag is graphite granule and/or MoS₂Granule；

Preferably, described fluid lubricant is selected from base oil, mineral oil, lubricating oil and lubrication One or more in fat (are selected from poly-diethylene glycol ether base grease oils and fats, perfluoroether One or many in plinth lubricant grease, Polyethylene Glycol lubricant grease and polyolefin base lubricant grease Kind)；

Preferably, wear-resisting nylon monomer-cast nylon is by caprolactam, catalyst, activator and wear-resisting modification Agent is made,

Preferably, the mass ratio of caprolactam and abrasion resistance modifier is preferably 100:3～15.

6. according to the multilamellar modified cast nylon material of right 5, wherein said wear-resisting casting Nylon has following one or more performance indications:

A) wear extent≤4mg, preferably≤3mg, more preferably≤2mg；

B) coefficient of friction≤0.5, preferably≤0.4, more preferably≤0.3.

7. according to the multilamellar modified cast nylon material of any one of right 1 to 6, described enhancing Containing (being such as filled with) reinforced modifier in nylon monomer-cast nylon,

Preferably, described reinforced modifier is preferably fiber and/or whisker, fiber or whisker Diameter is preferably 1～4 μm, and length is preferably 50～200 μm；

Preferably, one or more in carbon fiber, glass fibre and CNT of fiber；

Preferably, whisker, selected from organic crystalline palpus and/or inorganic crystal whisker, is selected from cellulose brilliant Palpus, poly-4-HBA ester whisker, butyl polyacrylate-styrene whisker, graphite whisker and One or more in poly-potassium titanate crystal whisker；

Preferably, described reinforced modifier processes through surface conditioning agent, described surface conditioning agent One or more of silane coupler, titanate coupling agent and aluminate coupling agent can be selected from；

Preferably, nylon monomer-cast nylon is strengthened by caprolactam, catalyst, activator and enhancing modified Agent is made；

Preferably, the mass ratio of caprolactam and reinforced modifier is preferably 100:10～20.

8. according to the multilamellar modified cast nylon material of right 7, wherein said enhancing casting Buddhist nun Dragon has following one or more performance indications:

C) hot strength >=70MPa, preferably >=90MPa, more preferably >=110MPa；

D) bending strength >=90MPa, preferably >=110MPa, more preferably >=130MPa；

E) compressive strength >=80MPa, preferably >=100MPa, more preferably >=120MPa.

9. according to the multilamellar modified cast nylon material of any one of right 1 to 8, described toughness reinforcing Containing (being such as filled with) plasticized modifier in nylon monomer-cast nylon,

Preferably, described plasticized modifier is preferably nano-particle and/or elastomer, nanometer The particle diameter of grain is preferably 20～50nm, and the particle diameter of elastomer is preferably 0.2～0.5 μm；

Preferably, described nano-particle is selected from nanometer Al₂O₃, nano-TiO₂, Nano-meter SiO_2₂、 One or more in nano zircite and nano-calcium carbonate；

Preferably, described nano zircite or nano-calcium carbonate are receiving through titanate esters modification Rice zirconium oxide or nano-calcium carbonate, the consumption of described titanate esters is preferably nano zircite or nanometer The 0.5% of weight of calcium carbonate～3% (such as 2.5%)；

Preferably, described elastomer is preferably thermoplastic elastomer (TPE), such as can be selected from PP, In POE, EVA, POE-g-GMA, EVA-g-MAH, EPDM, SBS and EPR One or more；

Preferably, toughness reinforcing nylon monomer-cast nylon is by caprolactam, catalyst, activator and toughening modifying Agent is made；

Preferably, the mass ratio of caprolactam and plasticized modifier is preferably 100:10～20.

10. according to the multilamellar modified cast nylon material of right 9, wherein said toughness reinforcing casting Buddhist nun Dragon has following one or more performance indications:

F) elongation at break >=20%, preferably >=40%, more preferably >=60%；

G) impact strength >=10KJ/m², preferably >=12KJ/m², preferably >=14KJ/m²。

The multilamellar modified cast nylon material of 11. any one of claim 5-10, wherein said Enhancing nylon monomer-cast nylon, toughness reinforcing nylon monomer-cast nylon or wear-resisting nylon monomer-cast nylon in can also contain phase respectively Hold agent, compatilizer is preferably the graft copolymer of rubber-plastic elastomer, as POE-g-MAH, SEBS-g-MAH, POE-g-GMA, EPDM-g-MAH etc..

The multilamellar modified cast nylon material of 12. any one of claim 5-11, wherein said The mass ratio of caprolactam, catalyst and activator be preferably 100:0.2～0.5:0.2～0.5；

Preferably, described catalyst is alkaline matter, be preferably selected from alkali metal, alkaline-earth metal, One or more of metal-oxide or derivant, are more preferably selected from NaOH, KOH, ethanol Sodium, Feldalat NM one or more；

Preferably, described activator is selected from isocyanates, is preferably selected from aromatic isocyanate Or one or more of aliphatic isocyanates, more preferably toluene di-isocyanate(TDI) (TDI) Or isophorone diisocyanate (IPDI).

The multilamellar modified cast nylon material of 13. any one of claim 1-12 is the most wear-resisting The preparation method of nylon monomer-cast nylon, toughness reinforcing nylon monomer-cast nylon or enhancing nylon monomer-cast nylon is:

1) in melted caprolactam, add catalyst, stir, be dehydrated；

2) as required, add selected from abrasion resistance modifier, reinforced modifier and plasticized modifier In one or more modifying agent, alternatively, add compatilizer while modifying agent adding, Agitating heating, continuation dehydration；

3) add activator, then cast, prepare；

Preferably, step 1) in, melted caprolactam is warming up to 125 ± 5 DEG C, adds Catalyst, stirs and is dehydrated 30-45min；

Preferably, step 2) in, the temperature of described agitating heating is 135 ± 5 DEG C；

Preferably, step 3) in, during described casting, first mould is preheating to 170 ± 5 DEG C； Then cast；

Preferably, after having cast, insulation polymerization, holding temperature is preferably 130～150 DEG C, Such as 140 ± 5 DEG C, temperature retention time is preferably 60～120min.

The multilamellar modified cast nylon material of 14. any one of claim 1～13 is the most wear-resisting The thickness of layer, enhancement layer or toughening layer is 10～50mm,

Preferably, in described multilamellar modified nylon materials, in parts by weight, wearing layer is 20～30 parts, enhancement layer is 20～40 parts, and toughening layer is 40～50 parts.

15. 1 kinds of parts, it is by the multilamellar modified cast nylon of any one of claim 1～14 Material is made；

Preferably, described part is power transmission shaft, ring flange, lining, axle sleeve, pipeline, pulley (such as metal-nylon two-phase pulley), slide block, slideway, multilamellar modified cast nylon plate, many Layer modified cast nylon rod or multilamellar modified cast nylon pipe；

Preferably, the internal layer of described lining is wearing layer, and middle level is enhancement layer, and outer layer is toughness reinforcing Layer；

Preferably, the internal layer of described pipeline is wearing layer, and outer layer is enhancement layer or toughening layer；

Preferably, the main part of described sleeve, pulley or slide block includes enhancement layer and/or increasing Tough layer, at least part of surface is wearing layer；

Preferably, the main part of described ring flange includes enhancement layer and/or toughening layer, seals Face is wearing layer；

Preferably, the sandwich layer of described multilamellar modified cast nylon rod is toughening layer, and intermediate layer is for increasing Strong layer, outer layer is wearing layer；

Preferably, each layer of described multilamellar modified cast nylon plate is followed successively by wearing layer, enhancement layer And toughening layer；

Preferably, the internal layer of described multilamellar modified cast nylon pipe is wearing layer, and intermediate layer is for increasing Strong layer, outer layer is toughening layer.

16. 1 kinds of multilamellar modified cast nylon materials preparing any one of claim 1～14 Method, the method be by wearing layer, toughening layer or enhancement layer as desired by successively casting (by Layer spun casting) method composite molding.

The method of 17. claim 16, it includes, by wear-resisting nylon monomer-cast nylon, toughness reinforcing casting Nylon or strengthen nylon monomer-cast nylon treat that poly-monomer is the most successively poured in mould.

The method of 18. claim 16 or 17, wherein said treat poly-monomer include melted oneself Lactams, catalyst, activator and corresponding modifying agent；

Preferably, treat that what poly-monomer poured into mould is spaced apart 1～3 minute for every kind；

Preferably, after needed poly-monomer pours into mould, insulation polymerization, holding temperature is preferred Being 130～150 DEG C, such as 140 ± 5 DEG C, temperature retention time is preferably 60～120min.