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Propylene-based resin composition and film produced therefrom

A technology of resin composition and propylene, which is applied in the direction of thin material processing, transportation and packaging, etc., can solve the problems of heat sealing damage, stickiness, lower heat sealing temperature, etc., and achieve excellent low temperature heat sealing and anti-blocking effect

Inactive Publication Date: 2003-10-15
SUMITOMO CHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the laminated film obtained by this technique has the disadvantage that its heat-sealability is impaired when corona treatment is used, and there is also a problem that it is impossible to achieve a sufficient reduction of the heat-sealing temperature because the increase in the comonomer content is too high, which will cause damage in the film-forming step. Sticky during period, so expect further improvement

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0148] [Synthesis of solid catalyst]

[0149] The air in a 200-liter stainless steel reactor equipped with a stirrer was replaced with nitrogen, and then 80 liters of hexane, 6.55 moles of tetrabutoxytitanium, 2.8 moles of diisobutyl phthalate and 98.9 moles of tetrabutyl Oxysiloxane, resulting in a homogeneous solution. Then, 51 liters of a solution of 2.1 mol / liter butylmagnesium chloride in isobutyl ether was slowly added dropwise over 5 hours while the temperature in the reactor was maintained at 5°C. After the dropwise addition was complete, stirring was continued for another hour. Solid-liquid separation was performed at room temperature, and washing with 70 liters of toluene was repeated three times.

[0150] Next, toluene was removed so that the slurry content became 0.6 kg / liter. Thereafter, a mixed solution of 8.9 mol of n-butyl ether and 274 mol of titanium tetrachloride was added, and then 20.8 mol of phthaloyl chloride was also added, followed by reaction at 11...

Embodiment 2

[0170] Perform granulation, film formation and evaluation of physical properties in the same manner as in Example 1, except that 90% by weight of propylene-based copolymer (X-1) and 10% by weight of TAFMFR XR110T (produced by Mitsui Chemicals, melting point 109.1° C. ) (Z-2) blending ratio, which is a propylene / 1-butene copolymer. The resulting pellets had an MFR of 7.5 g / 10 min. These results are listed in Table 1.

Embodiment 3

[0172] Pelletizing (MFR: 8.1 g / 10 min), film formation and evaluation of physical properties were carried out in the same manner as in Example 1, except that 80% by weight of propylene-based copolymer (X-1) and 20% by weight of Propylene / 1-butene copolymer (Z-2) blending ratio. These results are listed in Table 1.

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Abstract

Disclosed is a resin composition that comprises a propylene-based copolymer (X) consisting of two kinds of copolymeric components made up of propylene, alpha-olefin and optionally ethylene which are characterized by ethylene content and alpha-olefin content, the copolymer (X) exhibiting a specific endothermic behavior in DSC measurement; a crystalline olefin-based polymer (Z) having a melting point up to 115 DEG C.; and optionally a copolymer (Y) made up of propylene and alpha-olefin and / or ethylene. The resin composition can be modified by addition of a propylene-based polymer (W) and / or a nucleating agent (N) and can yield a film superior in low-temperature heat sealability and antiblocking property.

Description

technical field [0001] This invention relates to propylene-based resin compositions and to films produced using such compositions. [0002] The film of the present invention has the same optical properties as conventional polypropylene films, such as transparency and gloss, and also has excellent low-temperature heat-sealing properties and anti-blocking properties. Background technique [0003] Polypropylene is widely used in film and sheet fields because of its excellent transparency, heat resistance and food hygiene. In recent years, the production speed of bags has been increasing, and materials with good low-temperature heat sealing properties are expected in the field of food and other packaging. [0004] As a technology capable of achieving good low-temperature heat sealability, Japanese Patent No. 2 882 237 discloses a random copolymer of polypropylene, which is prepared from propylene and α-olefin or propylene, Copolymerization of ethylene and α-olefins, which has ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L23/14C08L23/20
CPCC08J2323/14C08L23/20C08L2308/00C08L23/142C08J5/18C08L2205/02Y10T428/31855Y10T428/31909C08L2666/06
Inventor 江原健堀英明
Owner SUMITOMO CHEM CO LTD
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