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Compositions comprising thermoplastic starch

一种热塑性淀粉、组合物的技术，应用在包含TPS和聚烯烃的组合物领域，达到易于熔融再生、淀粉含量高、好机械性能的效果

Active Publication Date: 2011-07-20
TRISTANO PTY LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at least the method of making the blend does not overcome its drawbacks
[0010] Although polymer blends comprising both TPS and petroleum-derived polymers have been developed, opportunities exist to address or improve one or more of the problems associated with such blends and / or methods of making such blends. Disadvantages or disadvantages, or at least provide useful alternatives to polymer blends and / or methods of making them

Method used

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  • Compositions comprising thermoplastic starch
  • Compositions comprising thermoplastic starch
  • Compositions comprising thermoplastic starch

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069]First, the components listed in the following Table 1 (composition A) were added in the order of starch, EAA, VLDPE, LDPE, calcium stearate, stearic acid, glycerin and sorbitol into a high-speed mixer for blending. The resulting physical blend was then melt processed in a vented twin-screw extruder having a melting profile of 140 / 170 / 175 / 175 / 165 / 155°C with a torque of < 80%, the screw speed is 320-350 rpm, the vacuum is -0.05 bar, and the output is 200 kg / h. Films were then blown from a composition of 50% by weight of Blend A and 50% by weight of LLDPE. The resulting film had a gauge of 15 microns, a tensile strength at break of 14 MPa and an elongation of greater than 200% (measured using a universal tensile testing machine).

[0070] Table 1: Composition A

[0071]

Embodiment 2

[0073] First, the components listed in the following Table 2 (composition B) were added into the high-speed mixer in the order of starch, LDPE, VLDPE, EAA, calcium stearate, stearic acid, glycerin and sorbitol for blending. The resulting physical blend was then melt processed in a vented twin-screw extruder having a melting profile of 140 / 170 / 175 / 175 / 165 / 155°C with a torque < 80%, the screw speed is 320-350 rpm, the vacuum is -0.05 bar, and the output is 200 kg / h. Blend B was then used to blow the film. The resulting film has a tensile strength at break greater than 10 MPa and an elongation greater than 250% (measured using a universal tensile testing machine). The film exhibits excellent antiblocking and antistatic properties.

[0074] Table 2: Composition B

[0075]

Embodiment 3

[0077] First, the components listed in the following Table 3 (Composition C) were added in the order of starch, EAA, VLDPE, EVALDPE, calcium stearate, stearic acid, glycerin and sorbitol into a high-speed mixer for blending. The resulting physical blend was then melt processed in a vented twin-screw extruder having a melting profile of 140 / 165 / 170 / 170 / 170 / 155°C with a torque of < 80%, the screw speed is 320-350 rpm, the vacuum is -0.05 bar, and the output is 200 kg / h. Blend C was foamed by melt processing Blend C with a conventional blowing agent masterbatch. The resulting foam is suitable as a flexible foam packaging material and has excellent softness and soft touch.

[0078] Table 3: Composition C

[0079]

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Abstract

The invention relates to a composition comprising very low density polyethylene having a density of less than 0.905g / cm3, ethylene acrylic acid copolymer and thermoplastic starch and / or the constituent components thereof.

Description

technical field [0001] The present invention generally relates to compositions comprising thermoplastic starch (TPS). In particular, the present invention relates to compositions comprising TPS and polyolefins, processes for their preparation, and products formed therefrom. Background technique [0002] With increasing emphasis on sustainability and the environment, there has been a corresponding increase in research towards the development of polymeric materials derived from or containing renewable bio-derived components. [0003] Much of the research to date to develop such polymeric materials has focused on utilizing naturally occurring biopolymers such as starch. Starch is attractive in that it is derived from renewable resources (ie plant products), readily available and relatively inexpensive. However, the mechanical properties of starch in its native form are poor compared to those of petroleum derived (ie "synthetic") polymers. [0004] The mechanical properties o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L3/02C08L3/04
CPCC08L33/08C08J5/18C08L23/06C08J2323/08C08L3/02C08L23/0853C08L23/0815C08L23/0869C08L23/0807C08L2666/04C08L2666/02C08L3/04C08L23/04C08L33/04
Inventor 陈昌平J·沙伊尔斯
Owner TRISTANO PTY LTD
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