Unlock instant, AI-driven research and patent intelligence for your innovation.

Plastic container

A technology for plastic containers and containers, which is applied in the direction of containers, rigid containers, thin material processing, etc., and can solve problems such as insufficient transparency

Inactive Publication Date: 2005-03-09
SUMITOMO CHEM CO LTD
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its transparency is not enough

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Plastic container

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0115]94 parts by weight of propylene-ethylene-butene-1 copolymer (1) and 6 parts by weight of ethylene-α-olefin copolymer (1) are mixed, followed by adding 0.01 parts by weight of hydrotalcite DHT-4C (by Kyowa Chemical Industry Co. , Ltd) and 0.1 parts by weight of Irganox B220 (manufactured by Ciba Specialty Chemicals), and mixed in a Henschel mixer. The resulting mixture was melt-kneaded in a single-screw extruder having a full-flight type screw with a diameter of 40 mm at a temperature of 230° C. and a screw rotation speed of 100 rpm. Thus, a resin composition is obtained. The MFR of the resin composition was 3.9 g / 10 min. Table 1 shows the mixing ratio of the copolymer and the MFR of the composition. Furthermore, the compression-molded sheet made of the resin composition had a flexural modulus of 760 MPa and an Izod impact strength of 3.5 kJ / m 2 , the light transmittance is 89.1%, and the haze is 33.6%. The sheet has excellent flexibility, low temperature impact stren...

Embodiment 2-6

[0118] In the same manner as in Example 1, a resin composition was prepared by melt-kneading a copolymer selected from a propylene-ethylene-butene-1 copolymer and an ethylene-α-olefin copolymer in a mixing ratio as shown in Table 1. Furthermore, a container was also produced in the same manner as in Example 1. The physical properties of the resin composition and of the containers made from the composition are summarized in Tables 3 and 4, respectively. These containers have excellent flexibility, transparency and heat resistance, and exhibit less viscosity.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
melt flow indexaaaaaaaaaa
Login to View More

Abstract

Disclosed is a plastic container having a wall comprising a layer made of a composition comprising a major amount of crystalline propylene-ethylene-butene-1 copolymer which has specific structural unit proportions and a specific melt flow rate and a minor amount of ethylene-alpha-olefin copolymer which has specific structural unit proportions, a specific melt flow rate and a specific density, the container being superior in flexibility, impact strength at low temperatures anddurability.

Description

technical field [0001] This invention relates to plastic containers. Background technique [0002] Containers made of polypropylene resins are excellent in many properties such as heat resistance, rigidity, chemical resistance, and water vapor barrier properties, so they are widely used. However, such containers have the problem of poor transparency, and many proposals for improving their transparency have been proposed. [0003] For example, there is known a container obtained by using a resin composition comprising: 98-70% by weight of a propylene-ethylene random copolymer resin and 2-30% by weight of Metal catalyst-polymerized ethylene-hexene-1 copolymer resin and 0.02-1.0 parts by weight of a higher fatty acid derivative based on 100 parts by weight of the composition (see JP-A-2001-181455). Such containers have improved clarity. However, when it is heat-treated, the higher fatty acid derivative present in the container migrates to the surface of the container, thereb...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14C08L23/08B29C49/04B29D22/00B65D1/02B65D23/00
CPCB65D23/003Y10T428/1352B65D1/0207
Inventor 城本征治野泽博
Owner SUMITOMO CHEM CO LTD