Title:
ETHYLENE POLYMER, SHAPED OBJECT OBTAINED BY STRETCHING SAME, AND PROCESS FOR PRODUCING ETHYLENE POLYMER
Document Type and Number:
WIPO Patent Application WO/2016/052751
Kind Code:
A9
Abstract:
An ethylene polymer which has a viscosity-average molecular weight (Mv) of 3,000,000-15,000,000 and which, after having undergone heating at 110°C for 6 hours in an environment having a reduced pressure of 0.1-0.5 kPa, has a quantity of heat of fusion (ΔH), as determined by differential scanning calorimetry, of 230-293 J/g, and in which the ratio of the 200/110 plane orientation index (a) of the ethylene polymer in an unprocessed state and the 200/100 plane orientation index (b) of a sheet obtained through pressing and rolling under the following conditions (1) to (3), (b)/(a), is 7 or greater. (1) Three grams of the ethylene polymer is pressed with a press-forming machine at 130°C and 11 MPa for 10 minutes. (2) The sheet is cooled at 25°C for 10 minutes while keeping the pressure at 11 MPa. (3) The obtained pressed sheet is heated at 140°C for 3 minutes and is compressed with a rolling machine having a temperature of 130°C and a let-off rate of 1 m/min, so as to result in a stretch ratio of 6.
Inventors:
TARUTANI ATSUYOSHI (JP)
KATAOKA KAZUYOSHI (JP)
KATAOKA KAZUYOSHI (JP)
Application Number:
PCT/JP2015/078236
Publication Date:
October 13, 2016
Filing Date:
October 05, 2015
Export Citation:
Assignee:
ASAHI CHEMICAL IND (JP)
International Classes:
C08F10/02; C08F4/6592; D01F6/04
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
Yoshiyuki Inaba (JP)
Yoshiyuki Inaba (JP)
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