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Ethylene series polymer composition for high-speed stretching making film and method for mfg. porous film

An ethylene-based and polymer technology, which is applied in the field of high-speed stretching film-making ethylene-based polymer compositions and the manufacture of porous films, can solve problems such as improving high-speed stretching film-making properties, and achieves excellent appearance, good flexibility, The effect of improving productivity

Active Publication Date: 2008-11-26
TOKUYAMA CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the above-mentioned method is a solution to improve the above-mentioned problem by adding a third component by adding a fatty acid dialkanolamine and a diester of an aliphatic dibasic acid, and does not use the composition of the resin to improve the high-speed stretch film forming property.

Method used

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  • Ethylene series polymer composition for high-speed stretching making film and method for mfg. porous film
  • Ethylene series polymer composition for high-speed stretching making film and method for mfg. porous film
  • Ethylene series polymer composition for high-speed stretching making film and method for mfg. porous film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] 30% by mass of linear low density polyethylene 1 (LLDPE1, manufactured by Dow Chemical, trade name "2047G") shown in Table 1, linear low density polyethylene 2 (LLDPE2, manufactured by Dow Chemical, trade name "2036P") 15 % by mass, 5% by mass of branched low-density polyethylene 4 (LDPE4, manufactured by Mitsui Chemicals, trade name "MIRASON16P"), and 50% by mass of calcium carbonate with an average particle diameter of 2.0 μm and zinc stearate as a dispersant, 2 parts by weight relative to the total 100 parts by weight of the above-mentioned vinyl polymer and calcium carbonate were mixed with a super mixer, and then uniformly kneaded at 220°C using a twin-screw kneading extruder and processed into pellets. Using a T-die forming machine, the pellets were formed into a film according to the conditions of the above-mentioned 5) Evaluation method of high-speed stretching film forming property, and a porous film was obtained. Table 2 shows various properties of the obtaine...

Embodiment 2

[0081] Except that the mixing ratio in Example 1 is changed to: LLDPE1 is 20% by mass, LLDPE2 is 15% by mass, LDPE4 is 5% by mass, and calcium carbonate with an average particle diameter of 2.0 μm is 60% by mass, in the same manner as in Example 1 The film was formed under the conditions to obtain a porous film. Table 2 shows various properties of the obtained porous film. Furthermore, the composition of Example 2 did not cause variation in the thickness of the obtained porous film even when the take-up speed of the take-up cooling roll was 60 m / min.

Embodiment 3

[0083] Except that LLDPE2 is 25% by mass, linear low-density polyethylene 3 (LLDPE3, manufactured by Dow Chemical, 2035G) shown in Table 1 is 20% by mass, LDPE4 is 5% by mass, and no dispersant is used. A membrane was formed under the same conditions to obtain a porous thin film. Table 2 shows various properties of the obtained porous film. Furthermore, the composition of Example 3 did not cause variation in the thickness of the obtained porous film even when the take-up speed of the take-up cooling roll was 60 m / min.

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Abstract

This ethylenic polymer composition for the high-speed drawn film-forming contains an ethylenic polymer in an amount of 35-60 mass% and an inorganic filler in an amount of 65-40 mass%, wherein the ethylenic polymer contains a branched-type low-density polyethylene in an amount of 3-20 mass% and is composed so that an elution component (component A) having an elution temperature of not less than 95[deg.]C and less than 120[deg.]C, an elution component (component B) having an elution temperature of not less than 85[deg.]C and less than 95[deg.]C, an elution component (component C) having an elution temperature of not less than 70[deg.]C and less than 85[deg.]C, and an elution component (component D) having an elution temperature of less than 70[deg.]C are contained in the olefinic polymer in amounts of 10-20 wt%, 20-40 wt%, 25-45 wt%, and 15-30 wt%, respectively, provided that the components A, B, C, and D are contained in an amount of 100 wt% in total, when the elution components having the specified temperature ranges are determined based on a curve relating the elution temperature to the amount of the elution component due to a continuous temperature-rising elution fractionation (TREF) method.

Description

technical field [0001] The present invention relates to an ethylene-based polymer composition for high-speed stretching film formation containing an ethylene-based polymer and an inorganic filler, and a method for producing a porous film using the ethylene-based polymer composition. Background technique [0002] Currently, many methods have been proposed in which a film containing a polyolefin resin and an inorganic filler is stretched in a uniaxial direction or a biaxial direction, voids and interconnected pores are formed in the film, and a porous film is produced. Therefore, this porous film is used in various applications such as sanitary materials, medical materials, building materials, and separators for batteries. [0003] However, in order to improve the productivity of the above-mentioned porous film, when the line speed at the time of film formation is increased, thick spots are likely to occur in the flow direction, which is the so-called pulling resonance phenome...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06B29C55/18
Inventor 中山信彦木下晴生
Owner TOKUYAMA CORP
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