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Thermoplastic elastomer materials

A technology of thermoplastic elastomers and body groups, which is applied to the types of packaging items, special packaging items, medical containers, etc., and can solve problems such as unsatisfactory performance, low strength, and poor heat resistance.

Inactive Publication Date: 2009-07-22
常州美迪塑料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

TPE + processing oil plastic materials such as SEBS have disadvantages such as poor heat resistance, low strength, easy precipitation of processing oil, and poor transparency.
With the improvement of people's living standards, the requirements for high-end consumer goods are also increasing. The usual SEBS + processing oil materials can no longer meet people's needs due to their performance limitations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] formula:

[0067] Random PP (S331) / HYBRAR7311 (Kuraray Company) = 60 / 40 (weight ratio, the same below)

[0068] The MFR of the random PP (S331) is 2

[0069] Mixing conditions:

[0070] Equipment name; twin-screw extruder (CTE-75, screw diameter D72mm, L / D is 32-56, Coperion Co., Ltd.)

[0071] The melt temperature during mixing is 210-220°C; the screw speed is 300-450rpm

[0072] step:

[0073] Mix the random PP (S331) of the formula with HYBRAR7311, and put the obtained mixture in the twin-screw basic machine at a melt temperature of 210-220°C; screw speed of 300-450rpm for extrusion to obtain a thermoplastic elastomer Material.

[0074] The above-mentioned blend has a hardness of 75A, a tensile strength of 25MPa, a breaking elongation of 650%, an MFR of 1.5, and a light transmittance greater than 98%. It can be used as a film material for infusion tubes and infusion bags.

[0075] Hardness test method: ISO7619

[0076] Tensile test method: ISO37, room temperat...

Embodiment 2

[0080] The method of embodiment 2 is identical with embodiment 1, difference is:

[0081] Formula, reactor PP(EP3711E1) / HYBRAR7311=70 / 30

[0082] The MFR of the reactor PP (EP3711E1) is 7

[0083] Mixing conditions

[0084] Equipment name; twin-screw extruder (CTE-75, screw diameter D72mm, L / D is 32-56, Coperion Co., Ltd.)

[0085] The melt temperature during mixing is 210-220°C; the screw speed is 300-450rpm

[0086] The hardness of the above blend is 73A, and the tensile strength is 26MPa;

[0087] The elongation at break is 660%, MFR2.0, and the light transmittance is greater than 98%. It can be used as a film material for infusion tubes and infusion bags.

[0088] Hardness test method: ISO7619

[0089] Tensile test method: ISO37, room temperature, tensile rate 150mm / min

[0090] Melt flow index test method: ISO1133, 230°C, 2.16Kg

[0091] Light transmittance test method: room temperature (25°C), film thickness is 200μm

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PUM

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Abstract

The invention provides a thermoplastic elastomer material which consists of the following ingredients according to weight percentage: (A) 30-80% of polyolefin resin and 20-70% of hydriding styrenic thermoplastic elastomer. The MFR of the polyolefin resin is 2-7, which is measured according to ISO1133 standard (the temperature is 230 DEG C, the load is 2.16kg). The thermoplastic elastomer material is obtained by mixing the ingredient (A) and the ingredient (B) at the melt temperature of 210-220 DEG C and the screw speed of 300-450rpm.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a thermoplastic elastomer material. Background technique [0002] The halogen contained in PVC is not conducive to human health. At the same time, 20-50% diisooctyl phthalate plasticizer (DEHP) should be added as a softener when making PVC products. DEHP and other phthalates are environmental estrogens. Similar substances can lead to increased incidence of female breast cancer, decreased male fertility, and abnormal development of adolescents. When PVC materials are used to make medical devices such as infusion supplies, DEHP is easy to dissolve in the medicine, which seriously endangers human health. Moreover, the impact of PVC on the ecological environment cannot be ignored. Incineration or deep burial below 600°C can produce dioxins, and DEHP will not degrade for a long time, which will continue to affect human health. With the revelation of the defects of soft PVC products,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/14B29C47/40A61J1/10A61M39/00C08L53/02
Inventor 王戈
Owner 常州美迪塑料科技有限公司
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