Perforated plastic film
A plastic film and through-hole technology, applied in the field of plastic film, can solve the problems of fragility, maceration-induced trauma, skin stuffiness, etc., and achieve the effect of low skin irritation
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Examples
Embodiment 1～4
[0182] In LL (ethylene-1-octene copolymer density 0.926g / cm 3 MI 2.0g / 10 minutes): LD (high pressure method low density polyethylene density 0.921g / cm 3 MI 0.4g / 10 minutes) = 70:30 polyethylene resin (composition) 0.5% by mass of glycerol monooleate is added, and the obtained material is extruded into a single layer billet using a ring die (implementation Examples 1, 4), 3-layer blanks (Example 2), or 5-layer blanks (Example 3) were then cooled and solidified with cold water to produce tubular blanks with a folded width of 120 mm and a thickness of 500 μm.
[0183] It is guided to an electron beam irradiation device, irradiated with electron beams accelerated to 500 kV, and cross-linking treatment is performed so that the absorbed dose reaches 80 kGy.
[0184] It is guided into a stretching machine for reheating, passing between two pairs of differential rolls, and forming a bubble by injecting air. Stretching is 8 times in the MD direction and 6 times in the TD direction (Examples ...
Embodiment 5
[0188] For the base film obtained in the same manner as in Examples 1 and 3 (extruded as a single-layer blank, and stretched under the conditions of 8 times in the MD direction and 6 times in the TD direction), the base film obtained by the cutting edge A roller cutter device 2 composed of a pair of roller cutters 21 and 22 with different patterns is provided to perform perforation processing to obtain a perforated plastic film.
[0189] image 3 The roller cutter device 2 used is shown in.
[0190] In the roll cutter device 2, the roll cutter 21 and the roll cutter 22 are arranged so as to face each other in cylindrical or columnar cutters. The axis of the roller cutter 21 and the axis of the roller cutter 22 are parallel to each other, and the roller cutter 21 and the roller cutter 22 are separated to the extent that the object to be pierced can be sandwiched. Support portions 24 are provided at both ends of the roller cutter 21 in the axial direction, and the roller cutter 21 i...
Embodiment 6
[0196] Add to 100 parts by mass of vinylidene chloride-vinyl chloride copolymer PVDC (vinylidene chloride monomer unit content / chlorinated vinyl monomer unit content = 80% by mass / 20% by mass, mass average molecular weight 120,000) 3 parts by mass of dibutyl sebacate as fatty acid esters, 4 parts by mass of acetyl tributyl citrate, and 2 parts by mass of epoxidized soybean oil as epoxy compound were mixed for 5 minutes with a Henschel mixer. The obtained mixture was extruded in a tubular shape using a melt extruder, and after being supercooled in a cold water tank at about 10°C, it was passed into water at 35°C, and the stretching temperature was 30°C for the MD direction 3.0 times, TD The direction was 4.0 times inflated and biaxially stretched, and the obtained tubular film was folded with a pinch roll to obtain a flat long substrate film with a thickness of 10 μm.
[0197] In the same manner as in Example 5, the roll cutter device 2 was used to perform perforation processing...
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Abstract
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