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1. CN102683632 - Unilateral stretching method for inducing and producing safety diaphragm with microporous structure

Office
China
Application Number 201210130952.6
Application Date 27.04.2012
Publication Number 102683632
Publication Date 19.09.2012
Grant Number 102683632
Grant Date 12.08.2015
Publication Kind B
IPC
H01M 2/18
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
2Constructional details, or processes of manufacture, of the non-active parts
14Separators; Membranes; Diaphragms; Spacing elements
18characterised by the shape
CPC
B29C 55/04
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
04uniaxial, e.g. oblique
C08J 5/18
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
C08J 2323/12
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G
2323Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
02not modified by chemical after treatment
10Homopolymers or copolymers of propene
12Polypropene
C08K 9/04
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
KUse of inorganic or non-macromolecular organic substances as compounding ingredients
9Use of pretreated ingredients
04Ingredients treated with organic substances
C08K 2201/011
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
KUse of inorganic or non-macromolecular organic substances as compounding ingredients
2201Specific properties of additives
011Nanostructured additives
H01M 10/052
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
10Secondary cells; Manufacture thereof
05Accumulators with non-aqueous electrolyte
052Li-accumulators
Applicants 范建国
Inventors 范建国
Agents 北京联瑞联丰知识产权代理事务所(普通合伙) 11411
Title
(EN) Unilateral stretching method for inducing and producing safety diaphragm with microporous structure
(ZH) 单向拉伸诱发生产微孔结构安全隔膜的方法
Abstract
(EN)
The invention discloses a unilateral stretching method for inducing and producing a safety diaphragm with a microporous structure. The method comprises the following steps of: (1) performing surface pretreatment on nano alumina in tetraisopropyl dititanate; (2) adding the pretreated nano alumina in an amount which is 0.5 to 2.5 percent of the mass of polymer, uniformly mixing, adding an inducer, fusing raw materials, and manufacturing a base film by casting; (3) stretching the base film under the conditions of the temperature of between 10 and 155 DEG C, the stretching speed of 0.1 to 30m per minute and the stretching ratio of 1 to 4 to form the microporous structure; and (4) stretching the microporous film according to a stretching ratio of 0.5 to 1.5, sizing the film at the temperature of between 70 and 165 DEG C, and forming a polyolefin microporous film product. The wettability of the diaphragm is improved, so that the safety of the diaphragm is improved.

(ZH)

本发明公开了一种单向拉伸诱发生产微孔结构安全隔膜的方法,是通过以下的步骤实现的:(1)将纳米氧化铝在四异丙基二钛酸酯中进行表面预处理;(2)将预处理后的纳米氧化铝均匀混入聚合物中,加入量为聚合物质量的0.5%~2.5%,加入诱发剂,对原料进行熔融,采用延流法制成基膜;(3)将基膜在10~155℃、拉伸速度为0.1~30m/min,拉伸比为1~4倍的条件下进行拉伸形成微孔结构;(4)微孔薄膜进行再拉伸,拉伸比为0.5~1.5,70~165℃定型,形成聚烯烃微孔膜产品。本发明提高了隔膜的浸润性,从而提高了隔膜的安全性问题。

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