Poly-4-methyl-1-pentene based resin composition and molded products obtained from the composition

A resin composition, pentene-based technology, used in synthetic resin layered products, layered products, transportation and packaging, etc., can solve the problem of no improvement in formability, and achieve the effect of improving stretchability and high strength

Inactive Publication Date: 2013-07-03
MITSUI CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the alloying of polyamide and poly-4-methyl-1-pentene using acid-modified polyethylene and polypropylene as compatibilizers has been proposed (Patent Documents 5, 6, etc.), but they mainly It is a polymer alloy with polyamide as the main component (matrix). The report is related to the improvement of high density, water absorption and chemical resistance, which are the disadvantages of polyamide. Improvement of the strength and formability of poly-4-methyl-1-pentene in the state of the special mold release property and low water absorption of polyene, not mentioned at all
In addition, in these Patent Documents 5 and 6, although there are descriptions related to the production of injection molded articles, there is no research related to the improvement of film moldability such as stretchability and inflation moldability.

Method used

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  • Poly-4-methyl-1-pentene based resin composition and molded products obtained from the composition
  • Poly-4-methyl-1-pentene based resin composition and molded products obtained from the composition
  • Poly-4-methyl-1-pentene based resin composition and molded products obtained from the composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～9、 comparative example 1～7

[0226] As poly-4-methyl-1-pentene (A), Mitsui Chemicals, Inc. MX002 (MFR (260°C, 5 kg load) 26 g / 10 minutes, melting point (Tm) 224°C) or RT18 (MFR (260°C, 5kg load) 20g / 10 minutes, melting point (Tm) 235°C).

[0227] In addition, as the polyamide (B), CM1041LO (PA6, MFR (260° C., 5 kg load) 13 g / 10 minutes, melting point (Tm) 225° C.) manufactured by Toray Corporation was used.

[0228] In Examples 1 to 9 and Comparative Examples 1 to 7, the poly-4-methyl-1-pentene (A) and polyamide (B) described in Table 1 or Table 2 and polyamide (B) synthesized in Production Example 1 were used. Modified poly-4-methyl-1-pentene (C) was used in the compounding amount recorded in Table 1 or Table 2, respectively, using a twin-screw extruder (manufactured by Technovel Co., Ltd., KZW-15, screw diameter 15mm, L / D=30, temperature 270° C., rotation speed 200 rpm) were melt-kneaded to obtain a resin composition.

[0229] Next, using a 30-ton injection molding machine (Nex30) manufactured by Toy...

Embodiment 10～18、 comparative example 8 and 9

[0247]Take 70×70 mm from the extruded films obtained in Examples 1-3, 7-9 and Comparative Examples 3 and 4, and specify in the MD direction of the extruded films at a stretching temperature of 100° C. and a stretching speed of 2 mm / sec. Uniaxial stretching at a certain ratio (Imoto Manufacturing Co., Ltd., automatic biaxial stretching device, IMC-18BD type), after stretching, the temperature is raised to 200 ° C, and heat setting is carried out for 10 minutes in the stretched state to obtain the specified Stretch film with stretch ratio.

[0248] Tables 3 and 4 show the values ​​of the predetermined stretch ratios and the results of the tensile tests of the obtained stretched films. In addition, regarding Examples 10 to 12 and Comparative Example 8, digital images related to the state of stretch molding of the stretched film due to the content of the polyamide (B) are shown in image 3 middle.

[0249] [table 3]

[0250] table 3

[0251] (A) / ((A)+(B)):(A) content relativ...

Embodiment 19～21、 comparative example 10 and 11

[0261] Using the resin compositions of the above-mentioned Examples 1-3 and Comparative Examples 3 and 5, an inflation film molding machine (manufactured by Thermoplastics Industry Co., Ltd., 20mmΦ inflation film manufacturing device) was used, and the temperature of the barrel and the die was both 270°C. , traction speed 2.5m / min, inflation ratio 2.0-2.5 for blown film forming. Table 5 shows the film shape, film thickness and tensile test physical properties of the obtained inflation film. In addition, regarding Examples 19 to 21 and Comparative Example 10, digital images related to the molded state of the inflation film are shown in Figure 4 middle.

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Abstract

To provide a poly-4-methyl-1-pentene based resin composition which exhibits improved film strength and improved moldability into various molded products while keeping the mold release properties and low water absorbency inherent in poly-4-methyl-1-pentene, and to provide molded products thereof. [Solution] The problem is solved by a poly-4-methyl-1-pentene based resin composition obtained by incorporating 0.1 to 30 parts by weight of a modified poly-4-methyl-1-pentene (C) prepared by grafting a monomer that contains an ethylenic unsaturated bond with 50 to 99 parts by weight of poly-4-methyl-1-pentene (A) and 1 to 50 parts by weight of a polyamide (B) (with the proviso that the sum of (A) and (B) is 100 parts by weight).

Description

technical field [0001] The present invention relates to a resin comprising poly-4-methyl-1-pentene, polyamide and modified poly-4-methyl-1-pentene graft-modified with monomers containing ethylenically unsaturated bonds Compositions, and shaped bodies and films comprising the compositions. Background technique [0002] Polymer (poly-4-methyl-1-pentene) made of 4-methyl-1-pentene as a monomer is widely used in various applications due to its excellent transparency, mold release properties, heat resistance, etc. . For example, sheets and films are used for mold release films and the like, taking advantage of features such as high melting point, good mold release properties, and high transparency, and are used for rubber hose mandrels and the like in molded products (Patent Document 1). [0003] However, although poly-4-methyl-1-pentene has a high melting point, it has been recognized that the elastic modulus, strength, and thermal dimensional stability at high temperatures ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/20B32B27/32C08J5/18C08L77/00C08L23/26
CPCB32B27/08B32B27/32B32B27/34B32B2250/24B32B2270/00C08J5/18C08J2323/20C08J2377/00C08J2451/06C08L23/20Y10T428/31728C08L51/06C08L77/00C08L23/26
Inventor 盐冶昌弘藤原和俊津金靖仁麻生善昭关亮一
Owner MITSUI CHEM INC
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