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Sealing strip material and preparation method thereof

A sealing strip and mineral filler technology, applied in the field of sealing strip materials and its preparation, can solve the problems of low welding strength and insufficient weather resistance, and achieve the effects of good welding strength, easy coloring, and improved fluidity

Inactive Publication Date: 2012-06-06
池建平
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the sealing strip materials in the prior art, and provide a sealing strip material, which has good mechanical properties, good resilience, high welding strength, excellent low temperature resistance, high weather resistance, and relatively cost-effective High characteristics, on the one hand, it overcomes the shortcomings of PVC sealing strips, on the other hand, it effectively solves the problems of low welding strength and insufficient weather resistance of current TPS sealing strips

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Take 40 parts of rubber filler oil, 15 parts of polypropylene resin, 12 parts of SEBS-MAH, 15 parts of calcium carbonate, 3 parts of silicone masterbatch MB50-002, 2 parts of UV-P, and 2 parts of Royalguard BC 250 antibacterial agent. Mix in a high-speed mixer for 9 minutes at 70°C, then granulate at a temperature of 210°C through a counter-rotating twin-screw extruder, and pack. The properties of the obtained materials are shown in Table 1.

[0029] Table 1 The performance of the product obtained in Example 1

[0030] performance standard international unit product performance Tensile Strength ASTM D412 MPa 7.5 Elongation ASTM D412 % 436 proportion ASTM D792 g / cm 3 1.03 Shrinkage ASTM D955 % 0.6-0.9 melt finger ASTM D1238 g / 10min(200℃ / 5kg) 1.54 Shore hardness ASTM D2240 Type A 72 weather resistance ISO 4892.2 ΔE 2.6 Corner welding tension ASTM D412 N 41.7 Crisp ASTM D74...

Embodiment 2

[0032] Take 35 parts of rubber filler oil, 25 parts of polypropylene resin, 10 parts of PP-MAH, 20 parts of talcum powder, 3.5 parts of MB50-002, 1 part of UV-P, and 3 parts of antibacterial agent. Mix in a high-speed mixer for 7 minutes at 90°C, then granulate at 220°C through a counter-rotating twin-screw extruder, and pack. The properties of the obtained materials are shown in Table 2.

[0033] Table 2 The performance of the product obtained in embodiment 2

[0034] performance standard international unit product performance Tensile Strength ASTM D412 MPa 8.2 Elongation ASTM D412 % 414 proportion ASTM D792 g / cm 3 1.04 Shrinkage ASTM D955 % 0.5-0.8 melt finger ASTM D1238 g / 10min(200℃ / 5kg) 2.24 Shore hardness ASTM D2240 Type A 83 weather resistance ISO 4892.2 ΔE 2.9 Corner welding tension ASTM D412 N 51.8 Crisp ASTM D746 ℃ -60

Embodiment 3

[0036] Take 50 parts of rubber filler oil, 35 parts of polypropylene resin, 15 parts of PP-MAH, 25 parts of calcium carbonate, 3 parts of MB50-002, 1 part of UV-531, and 3 parts of antibacterial agent. Mix in a high-speed mixer for 7 minutes at 90°C, then granulate at 200°C through a counter-rotating twin-screw extruder, and pack. The properties of the obtained materials are shown in Table 2.

[0037] Table 3 Embodiment 3 gained product performance

[0038] performance standard international unit product performance Tensile Strength ASTM D412 MPa 8.8 Elongation ASTM D412 % 406 proportion ASTM D792 g / cm 3 1.06 Shrinkage ASTM D955 % 0.6-0.9 melt finger ASTM D1238 g / 10min(200℃ / 5kg) 1.95 Shore hardness ASTM D2240 Type A 81 weather resistance ISO 4892.2 ΔE 2.4 Corner welding tension ASTM D412 N 47.6 Crisp ASTM D746 ℃ -60

[0039] It can be seen from the product performance th...

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PUM

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Abstract

The invention discloses a sealing strip material and a preparation method thereof. The sealing strip material provided by the invention is composed of rubber filling oil, polypropylene, a mineral filling material, a weather resisting agent, a compatibilizer, and a processing auxiliary agent. According to the invention, the raw materials are mixed in a high-speed mixer, and are granulated by using a counter-rotating twin-screw extruder, such that the sealing strips are prepared. No halogen-containing material or o-phenylene plasticizer material harming human health is introduced during the sealing strip material production process. The prepared sealing strips are advantaged in light weight, high resilience, good welding strength, easy coloring, good low-temperature resistance, and the like. When the material is subject to extrusion molding, high-temperature vulcanization is not required. During the extrusion process, no toxic gas decomposition occurs, equipment is not corroded, and rim leftovers can be recycled.

Description

technical field [0001] The invention relates to the field of thermoplastic elastomer materials, in particular to a sealing strip material and a preparation method thereof. Background technique [0002] Sealing strip products can only play a sealing role under the premise of elasticity, so various sealing strip products have been using elastic rubber materials for a long time. The first generation of rubber materials has the defects of difficult coloring, complicated processing procedures, and non-recyclability. Soon the rubber material was replaced by the second-generation PVC sealing material. PVC sealing material has the advantages of cheap price, simple production process, and high-efficiency continuous production. It has become the mainstream material used for refrigerator sealing strips. However, as consumers have higher and higher requirements for quality, the environmental protection of PVC sealing strips, the harmfulness of the processing of PVC sealing strips, and ...

Claims

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Application Information

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IPC IPC(8): C08L91/00C08L23/12C08L51/00C08L51/06C08L83/04C08K3/26C08K3/34
Inventor 池建平
Owner 池建平
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