초록 ▼

A 10 to 200 m3 or more, the high density polyethylene type film having a film surface roughness of 0.001 to 0.15 mD1”), the second heating roll (hereinafter referred to as “R2”), and the third heating roll (hereinafter referred to as “R3”), in accordance with the order of the passage of the original

A 10 to 200 m3 or more, the high density polyethylene type film having a film surface roughness of 0.001 to 0.15 mD1”), the second heating roll (hereinafter referred to as “R2”), and the third heating roll (hereinafter referred to as “R3”), in accordance with the order of the passage of the original material film, at a temperature of R2 higher than the temperatures of R1 and R3 and a temperature of R2 of 105°C. or more below the melting point of the film, for heat treatment, then cooling the same. The obtained high density polyethylene type film has a superior transparency, a good balance of strength in the M direction and T direction, a remarkably large impact strength, and a large Young\s modulus, and thus is suitable for use as a packing film for boxes for cigarettes, caramels, chocolates, etc., chewing gun, candy, and other confectionery.

대표청구항 ▼

A film having a thickness of 10 to 200 m0.935 g/cm3 or more and having an MFR of 0.1 g/10 min or less, said high density polyetheylene type film having a film surface roughness of 0.001 to 0.15 m0.10 to 0.50, a difference D0.1000 to 0.1070, an impact strength of 250 kgㆍcm/mm or more and a transparen

A film having a thickness of 10 to 200 m0.935 g/cm3 or more and having an MFR of 0.1 g/10 min or less, said high density polyetheylene type film having a film surface roughness of 0.001 to 0.15 m0.10 to 0.50, a difference D0.1000 to 0.1070, an impact strength of 250 kgㆍcm/mm or more and a transparency of a haze of less than 10%, said film being produced by passing an original material film, formed using high density polyethylene having a density of 0.935 g/cm3 or more by inflation at a blow ratio of 3 or more, through at least three heating rolls under temperature conditions such that the temperature of the second from the last heating roll R2 is set higher than the temperatures of the first, or third from the last, heating roll R1and the last heating roll R3, and the temperature of R2 is set at 105°C. or more but below the melting point of said film.