Claims
- 1. A method of producing an antiblocking thermoplastic film, comprising mixing 200 to 10,000 ppm of an antiblocking agent consisting essentially of fibrous particles of magnesium oxysulfate of the formula:
- MgSO.sub.4.5Mg(OH).sub.2.3H.sub.2 O,
- in the form of needle-shaped crystals with a length of 10 to 100 .mu.m and a thickness of less than 1 .mu.m and having a specific surface area of less than 10 m.sup.2 /g, determined by the BET method, into a melt of a thermoplastic resin; and
- forming the mixture of the thermoplastic resin melt with the antiblocking agent particles into a film.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-135461 |
Jun 1988 |
JPX |
|
Parent Case Info
This is a division of application Ser. No. 07/357,825, filed May 26, 1989 and now abandoned.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
4562230 |
Fukui et al. |
Dec 1985 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
56-149318 |
Nov 1981 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
357825 |
May 1989 |
|