CN211280044U - PTFE (polytetrafluoroethylene) filled UHMWPE (ultrahigh molecular weight polyethylene) based antistatic plate - Google Patents
PTFE (polytetrafluoroethylene) filled UHMWPE (ultrahigh molecular weight polyethylene) based antistatic plate Download PDFInfo
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- CN211280044U CN211280044U CN201920928208.8U CN201920928208U CN211280044U CN 211280044 U CN211280044 U CN 211280044U CN 201920928208 U CN201920928208 U CN 201920928208U CN 211280044 U CN211280044 U CN 211280044U
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Abstract
The utility model discloses a PTFE fills UHMWPE base and prevents static panel, this PTFE fills UHMWPE base and prevents static panel including the polytetrafluoroethylene layer that is in the center and locate the ultra high molecular weight polyethylene layer of polytetrafluoroethylene layer both sides. The polytetrafluoroethylene layer is arranged at the center of the plate, and the polytetrafluoroethylene not only has excellent elongation at break and tensile strength, but also can improve the tensile strength of the ultra-high molecular weight polyethylene; and the polytetrafluoroethylene layer and the ultra-high molecular weight polyethylene layer are the same in ultra-high molecular weight and have the same melt characteristics, and the products can be obtained by co-sintering after cold press molding.
Description
Technical Field
The utility model belongs to ultra high molecular weight polyethylene panel field, concretely relates to PTFE fills UHMWPE base and prevents static panel.
Background
The ultra-high molecular weight polyethylene (UHMWPE) is linear high density polyethylene having a viscosity average molecular weight of more than 150 ten thousand, and has ultra-strong wear resistance, self-lubricity, high strength, stable chemical properties, and strong anti-aging performance, and thus is widely used in the fields of chemical industry, textile, medicine, construction, metallurgy, mining, water conservancy, coal, electric power, and the like.
In the practical application process, when the ultra-high molecular weight polyethylene cannot meet the use requirements, the ultra-high molecular weight polyethylene is modified by methods such as blending and filling, or is made into a composite board by methods of attaching and bonding with other boards. For example, the ultra-high molecular weight polyethylene has a relatively low tensile strength, so that the conventional process generally increases the tensile strength of the ultra-high molecular weight polyethylene sheet by orienting the sheet by drawing. However, the final state of the sheet obtained by such stretching is unstable, and at a certain temperature, a certain degree of shrinkage occurs with time, so that the sheet has significant disadvantages in terms of dimensional stability and resistance to bending deformation.
In order to solve the problems, the chinese patent application with the application number CN 201510677243.3 discloses an ultrahigh molecular weight polyethylene/continuous fiber reinforced thermoplastic composite board, which comprises five layers, wherein the upper layer and the lower layer are both ultrahigh molecular weight polyethylene layers, the middle layer is a continuous fiber reinforced thermoplastic layer, and bonding resin layers are respectively arranged between the upper layer and the middle layer and between the lower layer and the middle layer; the middle layer is an impregnation belt which takes thermoplastic plastics as a matrix and continuous fibers as a reinforcement, the content of the continuous fibers is 20-80 wt%, the number of layers of the impregnation belt is 1-50, the thickness of each layer is 0.1-0.5 mm, and the impregnation belt is arranged in the same direction or two adjacent layers of impregnation belts are perpendicular to each other; the thermoplastic plastic is polyethylene, polypropylene, nylon or polyethylene terephthalate, and the fiber is glass fiber, basalt fiber or carbon fiber.
The middle layer in the composite material has complex components, complicated manufacture and higher cost, and the heat resistance of plastics such as nylon (namely polyamide) and the like is poor, the middle layer needs to be bonded with the ultra-high molecular weight polyethylene layer through bonding resin after the ultra-high molecular weight polyethylene layer is sintered, and the ultra-high molecular weight polyethylene has extremely low friction coefficient and large surface tension and is not easy to be adhered by other substances, so that the layer structure of the composite board has poor viscosity and is easy to separate.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a PTFE fills UHMWPE base and prevents static panel that layer structure is stable, can not separate between the layer.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
a PTFE-filled UHMWPE-based antistatic plate comprises a polytetrafluoroethylene layer in the center and ultrahigh molecular weight polyethylene layers arranged on two sides of the polytetrafluoroethylene layer.
The utility model arranges the polytetrafluoroethylene layer in the center of the plate, the Polytetrafluoroethylene (PTFE) not only has excellent elongation at break and tensile strength, but also can improve the tensile strength of the ultra-high molecular weight polyethylene; and the polytetrafluoroethylene layer and the ultra-high molecular weight polyethylene layer are the same in ultra-high molecular weight and have the same melt characteristics, and the products can be obtained by co-sintering after cold press molding.
In the PTFE-filled UHMWPE-based antistatic plate, the ultrahigh molecular weight polyethylene layer is dispersed with conductive carbon black powder. The conductive carbon black powder can endow the plate with excellent antistatic performance.
In the PTFE-filled UHMWPE-based antistatic plate, the conductive carbon black powder is carbon black powder with N- (benzocyclobutene-4-yl) maleimide grafted on the surface. Compared with carbon black, the carbon black with N- (benzocyclobutene-4-yl) maleimide grafted on the surface has excellent dispersibility, can ensure that conductive carbon black powder is uniformly dispersed in the ultra-high molecular weight polyethylene, and ensures the comprehensive performance of the ultra-high molecular weight polyethylene layer.
In the PTFE-filled UHMWPE-based antistatic plate, the content of the conductive carbon black powder in the ultrahigh molecular weight polyethylene layer is 10-15 g/100 g of ultrahigh molecular weight polyethylene.
Because the radiation resistance of the polytetrafluoroethylene is poor, in the PTFE-filled UHMWPE-based antistatic plate, a radiation-resistant layer is also arranged between the polytetrafluoroethylene layer and the ultrahigh molecular weight polyethylene layer. So make the utility model discloses a panel has more extensive application range.
In the PTFE-filled UHMWPE-based antistatic plate, the anti-radiation layer is a boron carbide powder layer. Boron carbide powder not only low density, intensity are big, have fabulous high temperature stability (melting point reaches 2350 ℃) and chemical stability moreover for boron carbide powder can be with ultra high molecular weight polyethylene and polytetrafluoroethylene sintering jointly and the holding performance is stable, can also give the utility model discloses a more excellent comprehensive properties of panel.
In the PTFE-filled UHMWPE-based antistatic plate, the diameter of the boron carbide powder in the boron carbide powder layer is 5-300 μm. The finer the boron carbide powder, the better it can be fused between the polytetrafluoroethylene layer and the ultra-high molecular weight polyethylene layer during sintering.
In the PTFE-filled UHMWPE-based antistatic plate, the thickness of the boron carbide powder layer is between 500 and 2000 mu m. If the thickness of the boron carbide powder layer is too large, the adhesion between the polytetrafluoroethylene layer and the ultra-high molecular weight polyethylene layer is affected; and if the thickness of the boron carbide powder layer is too small, the radiation resistance is weak.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
the polytetrafluoroethylene layer is arranged at the center of the plate, and the polytetrafluoroethylene not only has excellent elongation at break and tensile strength, but also can improve the tensile strength of the ultra-high molecular weight polyethylene; and the polytetrafluoroethylene layer and the ultra-high molecular weight polyethylene layer are the same in ultra-high molecular weight and have the same melt characteristics, and the products can be obtained by co-sintering after cold press molding.
Drawings
Fig. 1 is a schematic structural view of a PTFE-filled UHMWPE-based antistatic sheet according to the present invention;
FIG. 2 is a schematic view of the microstructure of the ultra-high molecular weight polyethylene layer of FIG. 1;
fig. 3 is a schematic view of the microstructure at the radiation protective layer in fig. 1.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.
Example 1
As shown in fig. 1, the PTFE-filled UHMWPE-based antistatic plate of the present embodiment includes a polytetrafluoroethylene layer 1 at the center, ultra-high molecular weight polyethylene layers 2 disposed on two sides of the polytetrafluoroethylene layer 1, and an anti-radiation layer 3 disposed between the polytetrafluoroethylene layer 1 and the ultra-high molecular weight polyethylene layers 2.
In this embodiment, the radiation-resistant layer 3 is a boron carbide powder 31 layer. Boron carbide powder 31 is not only low in density, intensity is big, has fabulous high temperature stability fusing point moreover and reaches 2350 ℃ and chemical stability for boron carbide powder 31 can be sintered jointly with ultra high molecular weight polyethylene and polytetrafluoroethylene and the holding performance is stable, can also give the utility model discloses a more excellent comprehensive properties of panel, like high strength, radioresistance, panel light in weight etc..
In order to ensure that the boron carbide powder 31 exerts the required radiation resistance without affecting the adhesion between the polytetrafluoroethylene layer 1 and the ultra-high molecular weight polyethylene layer 2, in the present embodiment, the thickness of the boron carbide powder 31 layer is preferably set to be between 500-2000 μm, the diameter of the selected boron carbide powder 31 is preferably between 5-300 μm, and the smaller the diameter of the boron carbide powder 31, the better.
As shown in fig. 2, in the ultrahigh molecular weight polyethylene layer 2 of the present example, the conductive carbon black powder 21 is dispersed, and the conductive carbon black powder 21 can impart excellent antistatic performance to the sheet material. The conductive carbon black powder 21 selected in this embodiment is a carbon black powder on which N- (benzocyclobutene-4-yl) maleimide is grafted on the surface, and the content of the conductive carbon black powder 21 in the ultrahigh molecular weight polyethylene layer 2 is preferably 10 to 15 g/100 g of ultrahigh molecular weight polyethylene.
The carbon black surface-grafted with N- (benzocyclobutene-4-yl) maleimide has excellent dispersibility as compared with carbon black, and can ensure that the conductive carbon black powder 21 is uniformly dispersed in the ultra-high molecular weight polyethylene, ensuring the overall performance of the ultra-high molecular weight polyethylene layer 2.
The preparation process of the PTFE-filled UHMWPE-based antistatic sheet material of the present embodiment comprises:
putting the raw material of the ultra-high molecular weight polyethylene layer 2 into a mould, pressing into a first layer green body, uniformly scattering boron carbide powder 31 on the first layer green body, putting the raw material of the polytetrafluoroethylene layer 1 into the boron carbide powder 31 layer in the mould, pressing into a second layer green body, uniformly scattering boron carbide powder 31 on the second layer green body, putting the raw material of the ultra-high molecular weight polyethylene layer 2 into the boron carbide powder 31 layer in the mould, and pressing into a third layer green body;
the green body and the die are moved into an oven and sintered at 230 ℃ to obtain the PTFE-filled UHMWPE-based antistatic plate of the embodiment; as shown in FIG. 3, in the plate, the edges of the layer of boron carbide powder 31 have some boron carbide powder 31 fused in the polytetrafluoroethylene layer 1 and the ultra-high molecular weight polyethylene layer 2.
Claims (8)
1. The PTFE-filled UHMWPE-based antistatic plate is characterized by comprising a polytetrafluoroethylene layer (1) positioned in the center and ultrahigh molecular weight polyethylene layers (2) arranged on two sides of the polytetrafluoroethylene layer (1).
2. The PTFE-filled UHMWPE-based antistatic sheet material as claimed in claim 1, wherein said ultra-high molecular weight polyethylene layer (2) has conductive carbon black powder (21) dispersed therein.
3. The PTFE-filled UHMWPE-based antistatic sheet material as claimed in claim 2 wherein said conductive carbon black powder (21) is carbon black powder with N- (benzocyclobutene-4-yl) maleimide grafted on its surface.
4. The PTFE-filled UHMWPE-based antistatic sheet material as claimed in claim 2, wherein said conductive carbon black powder (21) is present in the ultra high molecular weight polyethylene layer (2) in an amount of 10-15 g per 100 g of ultra high molecular weight polyethylene.
5. The PTFE-filled UHMWPE-based antistatic plate according to any one of claims 1 to 4, characterized in that an anti-radiation layer (3) is further arranged between the polytetrafluoroethylene layer (1) and the ultra-high molecular weight polyethylene layer (2).
6. The PTFE-filled UHMWPE-based antistatic sheet material according to claim 5 wherein said radiation-resistant layer (3) is a layer of boron carbide powder (31).
7. The PTFE-filled UHMWPE-based antistatic sheet material according to claim 6 wherein said layer of boron carbide powder (31) has a diameter of the boron carbide powder (31) comprised between 5 and 300 μm.
8. The PTFE-filled UHMWPE-based antistatic sheet material as claimed in claim 7 wherein said layer of boron carbide powder (31) has a thickness comprised between 500 and 2000 μm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928208.8U CN211280044U (en) | 2019-06-19 | 2019-06-19 | PTFE (polytetrafluoroethylene) filled UHMWPE (ultrahigh molecular weight polyethylene) based antistatic plate |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920928208.8U CN211280044U (en) | 2019-06-19 | 2019-06-19 | PTFE (polytetrafluoroethylene) filled UHMWPE (ultrahigh molecular weight polyethylene) based antistatic plate |
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| CN211280044U true CN211280044U (en) | 2020-08-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113980160A (en) * | 2021-11-08 | 2022-01-28 | 上海珀利医用材料有限公司 | Modified ultrahigh molecular weight polyethylene resin, preparation method thereof and heat-crosslinked plate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113980160A (en) * | 2021-11-08 | 2022-01-28 | 上海珀利医用材料有限公司 | Modified ultrahigh molecular weight polyethylene resin, preparation method thereof and heat-crosslinked plate |
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