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Film cutter

A technology of film cutting and mass fractionation, which is applied in thin material processing, packaging, metal processing, etc., can solve the problems of bonding strength, long time, and rising manufacturing costs, and achieve the effect of easy installation and excellent melt adhesion

Inactive Publication Date: 2012-05-23
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, although the film cutter mainly composed of the above-mentioned polylactic acid resin has the same cutting performance and cutting durability as the metal cutter, on the other hand, there is a problem of sticking when it is attached to the paper material of the storage box. problems with strength
That is, when the riveting method (kashime method) is used for bonding like a metal cutter, the material is less likely to be plastically deformed, so the bonding may be insufficient.
In addition, when bonding by ultrasonic bonding like paper cutters, the bonding strength is insufficient
Therefore, there is a problem that an adhesive, its application method, and a bonding process using an adhesive are required, resulting in an increase in manufacturing cost.
However, although this technology can obtain relatively good melt-adhesion with paper, it takes a long time to form a firm melt-adhesion with paper, so it is difficult to achieve industrial mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0172] Mix (a)-1 and (b)-1 at a mixing mass ratio of 90:10, and use a φ40mm co-rotating twin-screw extruder at 210°C to extrude the layer from a 2-layer multi-manifold die lip (I), at the same time, mix (a)-1, (a)-3 and (c)-1 with the ratio of mixing mass ratio 20:50:30, and utilize φ 25mm co-rotating twin-screw extruder at 210 The layer (II) was extruded from the same die lip at 0°C to obtain a coextruded sheet. At this time, the extrusion amount of molten resin was adjusted so that the thickness ratio of layer (I) and layer (II) was 9:1.

[0173] Next, the coextruded sheet was quenched with a casting roll at about 55° C. to obtain an unstretched sheet.

[0174] Then, at a temperature of 75°C, the length direction is stretched 2.5 times in the longitudinal direction, and the width direction is stretched to 3.0 times at a temperature of 75°C with a tenter. Heat treatment was carried out at a temperature of 100°C to form a laminate.

[0175] Regarding the thickness of the la...

Embodiment 2

[0178] As the layer (II), a resin composition obtained by mixing (a)-1, (a)-3, and (c)-2 at a mixing mass ratio of 20:50:30 was used, and in addition, Production and various evaluations of the laminate were performed in the same manner as in Example 1. The results are shown in Table 1.

Embodiment 3

[0180] As the layer (II), a resin composition obtained by mixing (a)-1, (a)-3, and (c)-3 at a mixing mass ratio of 20:50:30 was used, and in addition, Production and various evaluations of the laminate were performed in the same manner as in Example 1. The results are shown in Table 1.

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Abstract

Provided is a film cutter using a lactic acid-based resin as a material, wherein the film cutter has excellent cutting properties, can be easily attached to a paper storage container, and can provide a sufficient adhesion strength. The film cutter is formed of a laminate composed of a layer (I) which contains 70 parts by mass to 100 parts by mass of a lactic acid resin (A-1) having a quantity of heat of crystal fusion (Hm) not less than 30J / g, and 0 parts by mass to 30 parts by mass of inorganic fine particles (B), and a layer (II) which is formed on at least one surface of the layer (I) and which contains 51 parts by mass to 95 parts by mass of a lactic acid resin (A-2) having a quantity of heat of crystal fusion (Hm) between 0 J / g and 25 J / g, and 5 parts by mass to 49 parts by mass of an ethylene copolymer (C). The laminate is stretched in at least one direction.

Description

technical field [0001] The present invention relates to a plastic film cutter having excellent adhesion to a paper material of a storage box for storing wrap films and the like, and having cutting performance equivalent to that of a metal blade. Background technique [0002] Films such as plastic wrap, aluminum foil, and cooking sheets are stored in a paper storage box (thick cardboard box) in the state of being wound on a paper tube, etc., and when necessary, pull out the necessary length from the storage box, Use after cutting with a serrated film cutter. [0003] Traditional film cutters of this type are mostly made of metal, and are riveted and installed on the edges of, for example, the front plate, bottom plate, or cover plate of the storage box. [0004] On the other hand, metal cutters have excellent cutting properties, but on the other hand, they need to be disassembled from the storage box one by one because they will cause incineration residues if they are direct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B26D1/00B26D1/02B65D5/72B65D25/52
CPCB26D1/0006B65H2401/113B26F3/02B65H35/008B26D2001/002B65H2401/11B26D1/00B26D1/02B65D25/52B65D5/72
Inventor 田中一也寺田滋宪
Owner MITSUBISHI CHEM CORP
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