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EP0336680A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Resin composition and molded products thereof

Assignee: Kureha Corp
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Filing: 1989-04-03
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Granted: —
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Expires: 2009-04-03
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Abstract

Abstract Disclosed herein are a resin composition comprising 5 to 95 % by weight of a vinylidene chloride resin and 5 to 95 % by weight of a polyamide resin having a low crystalline melting point of not higher than 210°C and a molded product of said resin composition. The molded product of the present invention shows a molded product excellent in gas-barrier property and impact strength at low temperature, particularly a film, sheet or container. Among the resin compositions of the present invention, since the composition having 60 to 95 % by weight of vinylidene chloride resin is particularly rich in gas-barrier property, it is suitable for packaging foods, and since the composition having more than 40 % by weight and not more than 95 % by weight of polyamide resin is excellent particularly in impact strength at low temperature, it is suitable as the packaging material for use at an extremely low temperature. Moreover, the gas-barrier property and the transparency of the latter molded product which is rich in polyamide resin can be improved by stretching the product so that the dispersed particle of vinylidene chloride resin is made to be flat.

Inventors

  • 👤 Nobuyuki Hisazumi
  • 👤 Tsutomu Uehara
  • 👤 Hiroyuki Ohba
  • 👤 Kazuhiko Hirose

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-11-07 15:18
CPC Classifications
C; C08; C08L; C08L27/00; C08L27/02; C08L27/04; C08L27/08; C08L77/00; B; B29; B29K; B29K2027/00; B29K2027/08; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1341; Y10T428/1352; Y10T428/1379; Y10T428/31504; Y10T428/31725; Y10T428/31739

Claims Analysis

Total Claims: 18
Claim 1
Independent Claim 35 words
A resin composition comprising 5 to 95 % by weight of vinylidene chloride resin and 5 to 95 % by weight of polyamide resin having a low crystalline melting point of not higher than 210°C.
Claim 2
Dependent Claim 35 words
A resin composition comprising 5 to 95 % by weight of vinylidene chloride resin and 5 to 95 % by weight of polyamide resin having a low crystalline melting point of not higher than 210°C.
Claim 3
Dependent Claim 10 words
A molded product comprising the resin composition of claim 1.
Claim 4
Dependent Claim 51 words
The molded product according to claim 2, wherein the oxygen permeability coefficient is not more than 2.0 x 10⁻¹¹cc·cm/cm²·sec·cmHg at 30°C and 100 %RH and the water vapor transmission rate of the molded product of 30 µm in thickness is not more than 150 g/m²·day at 40°C and 90 % RH.
Claim 5
Dependent Claim 23 words
The molded product according to claim 2, wherein the brittle temperature is not higher than 10°C as the Tb value of the film.
Claim 6
Dependent Claim 14 words
The molded product according to claim 2, which is a film, sheet or container.
Claim 7
Dependent Claim 40 words
The resin composition according to claim 1, which comprises 60 to 95 % by weight of vinylidene chloride resin and 40 to 5 % by weight of polyamide resin having a low crystalline melting point of not higher than 210°C.
Claim 8
Dependent Claim 11 words
The molded product comprising the resin composition according to claim 6.
Claim 9
Dependent Claim 53 words
The molded product according to claim 7, wherein the oxygen permeability coefficient is not more than 1.5 x 10⁻¹¹ cc·cm/cm².sec·cmHg at 30°C and 100 % RH and the water vapor transmission rate of the molded product of 30 µm in thickness is not more than 80 g/m²·day at 40°C and 90 % RH.
Claim 10
Dependent Claim 14 words
The molded product according to claim 7, which is a film, sheet or container.
Claim 11
Dependent Claim 56 words
The resin composition according to claim 1, which comprises more than 40 % by weight and not more than 95 % by weight of polyamide resin having a low crystalline melting point of not higher than 210°C and less than 60 % by weight and not less than 5 % by weight of vinylidene chloride resin.
Claim 12
Dependent Claim 11 words
The molded product comprising the resin composition according to claim 10.
Claim 13
Dependent Claim 23 words
The molded product according to claim 11, wherein the brittle temperature is not higher than 10°C as the Tb value of the film.
Claim 14
Dependent Claim 14 words
The molded product according to claim 11, which is a film, sheet or container.
Claim 15
Dependent Claim 69 words
A stretched molded product having at least one layer comprising the resin composition according to claim 10, the dispersed particle of vinylidene chloride resin in said layer showing a long and flat shape along with at least one of the stretched direction and the flatness (long axis of the cross section of the dispersed particle/short axis of the cross section of the dispersed particle) being not less than 2.
Claim 16
Dependent Claim 26 words
The stretched molded product according to claim 14, wherein the oxygen permeability coefficient is not more than 1.5 x 10⁻¹¹cc·cm/cm²·sec·cmHg at 30°C and 100 % RH.
Claim 17
Dependent Claim 26 words
The stretched molded product according to claim 14, wherein the haze of said molded product of 30 µm in thickness is not more than 40 %.
Claim 18
Dependent Claim 15 words
The stretched molded product according to claim 14, which is a film, sheet or container.

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