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A kind of polyphenylene sulfide film suitable for ultra-thin coating and its preparation method and application

A technology of polyphenylene sulfide film and polyphenylene sulfide resin, which is applied in the field of preparation of polyphenylene sulfide film, can solve the problems of difficult processing, easy film breakage, easy breakage of cast pieces, etc., and achieves improved thickness uniformity, flat surface Excellent effect

Active Publication Date: 2022-06-21
ZHEJIANG NHU SPECIAL MATERIALS +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can introduce anti-blocking agents into the surface of the film, these nano-sized particles also have the function of nucleating agents, which will accelerate the crystallization rate of the resin when melt-blended with the resin, resulting in processing difficulties, such as the rapid increase in crystallinity. It is easy to break when casting, and it is easy to break the film when stretched.

Method used

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  • A kind of polyphenylene sulfide film suitable for ultra-thin coating and its preparation method and application
  • A kind of polyphenylene sulfide film suitable for ultra-thin coating and its preparation method and application
  • A kind of polyphenylene sulfide film suitable for ultra-thin coating and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] First, the solid polyphenylene sulfide powder (NHU-PPS 3505, Zhejiang Xinhecheng Special Materials Co., Ltd., the same below) was melted, extruded by a twin-screw extruder, and cut into granular solids after extrusion. Put it into vacuum drying, take away excess water by controlling the inflow of dry nitrogen, send the dried polyphenylene sulfide particles into a twin-screw extruder, melt at 290 ℃ and then send it to the die for extrusion, and then extrude it with a shock The cold roll and electrostatic adsorption device are cooled and shaped, so that the melt becomes a sheet with high flatness and low crystallinity.

[0042]The sheet was then sent to a longitudinal stretching machine for 3.4 times stretching, and the longitudinally stretched film was introduced into the coating machine through a guide roller; 1.5 wt% epoxy resin (EPIKOTE 1007-CT-55, USA Hexion Momentive, solid content is 55%, the same below), 1.5wt% polyphenylene sulfide resin (melt flow rate is 3500g / ...

Embodiment 2

[0049] In this example, 2.5wt% epoxy resin, 2.5wt% polyphenylene sulfide resin (melt flow rate is 3500g / 10min), 0.2wt% dimethylaminopropylamine, 5wt% ethanol, 0.05wt% The nano copper powder (D90=80nm) is mixed with the remaining water and stirred to make a high molecular polymer solution. Other than that, the same steps as in Example 1 were used to fabricate the negative electrode current collector of the PPS film substrate.

[0050] The evaluation results of the negative current collector of the PPS film substrate prepared in this example are shown in Table 1. The film has excellent flatness and excellent thickness uniformity of the copper plating layer.

Embodiment 3

[0052] In this example, 1.5wt% epoxy resin, 1.5wt% polyphenylene sulfide resin (melt flow rate is 4000g / 10min), 0.2wt% dimethylaminopropylamine, 5wt% ethanol, 0.05wt% The nano copper powder (D90=80nm) is mixed with the remaining water and stirred to make a high molecular polymer solution. Other than that, the same steps as in Example 1 were used to fabricate the negative electrode current collector of the PPS film substrate.

[0053] The evaluation results of the negative current collector of the PPS film substrate prepared in this example are shown in Table 1. The film has excellent flatness and excellent thickness uniformity of the copper plating layer.

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Abstract

The invention discloses a polyphenylene sulfide film suitable for ultra-thin coatings and its preparation method and application. The polyphenylene sulfide film suitable for ultra-thin coatings includes a polyphenylene sulfide film layer, and the polyphenylene sulfide film The upper and lower surfaces of the layer are each provided with a polymer coating. The preparation process includes: using polyphenylene sulfide resin without anti-blocking agent as raw material, obtaining a polyphenylene sulfide sheet after melt extrusion, cooling and shaping; stretching the polyphenylene sulfide sheet longitudinally, The two sides of the stretched film are uniformly coated to prepare a polymer coating; then transversely stretched, heat-set, cooled and wound up. The polyphenylene sulfide film suitable for ultra-thin coatings disclosed by the present invention has greatly improved surface smoothness and surface roughness ≤ 0.08 μm, thus ensuring the uniformity of subsequent coating thickness, and can be prepared as a storage film by further copper plating treatment. Negative current collector for energy devices.

Description

technical field [0001] The invention relates to the field of preparation of polyphenylene sulfide films, in particular to a polyphenylene sulfide film suitable for ultra-thin plating layers, a preparation method thereof, and an application in preparing a negative electrode current collector. Background technique [0002] The traditional lithium-ion battery anode current collector uses copper foil, but with the development of lithium-ion battery technology, the high energy density, light weight and flexibility of lithium-ion batteries have become the direction that people are pursuing. Thinning copper foil can reduce the weight of lithium-ion batteries, improve energy density, and reduce costs. However, due to the limitation of preparation technology, it is difficult to greatly reduce the thickness of copper foil; more importantly, copper foil becomes thinner. After that, the mechanical strength decreases, resulting in a decrease in processability. [0003] A new thinning di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J7/04C08J5/18C09D181/02C09D163/00C09D7/61C08L81/02
CPCC08J7/04C08J5/18C09D181/02C09D163/00C09D7/61C09D7/67C08K2201/011C08K2003/085C08K2201/003C08J2381/02C08J2481/02C08J2463/00C08K2003/265C08K2003/2227C08L63/00C08K3/08C08L81/02C08K3/26C08K3/22
Inventor 周贵阳金秉宸沈金涛邓杭军
Owner ZHEJIANG NHU SPECIAL MATERIALS