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Method for producing latex foamed product by using low-protein latex

A foaming product and latex technology, applied in the field of latex foaming products, can solve the problems of low tensile strength, low elongation at break, uneven cell size, large compression permanent deformation, etc. Uniform size and small compression set

Pending Publication Date: 2020-04-10
RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In addition, the existing sponge products also have non-uniform cell size, rough pore structure, and internal defects of the product, which lead to large compression permanent deformation, low tensile strength, low elongation at break, and low rebound rate. Unsatisfactory problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0073] The second aspect of the present invention provides a method for preparing the natural latex foamed product as described above, which includes the following steps:

[0074] 1) Latex compounding: Stir and mix the formula amount of latex, additives, and vulcanizing agent for 30 minutes to obtain compounded latex for later use, and leave it to stand for 12-72 hours;

[0075] 2) Mechanical bubble: add the filler, foaming agent, and foaming agent of the formula to the compounding compound and mix, and the mixed system is stirred and foamed in the mechanical foaming machine at a speed of 200-350r / min. 5min, then reduce the speed to 50~60r / min and homogenize the foam for 1~3min; then add the active agent and stir for 0.5~2min, add the gelling agent and stir for 1~3min to obtain the styrofoam;

[0076] 3) Foam rubber injection: inject foam rubber into the mold and shape it at 95~110℃;

[0077] 4) Vulcanization: the finalized prototype is vulcanized together with the model, the temperat...

Embodiment 1

[0082] This embodiment provides a natural latex foamed product. Its raw materials, in parts by weight, include latex 100, vulcanizing agent 3, foaming agent 2.5, foaming agent 2, gelling agent 0.8, active agent 4, auxiliary Agent 8, filler 9.

[0083] The protein content of the latex is 0.65wt%; the vulcanizing agent is sulfur; the foaming agent is cetylpyridinium bromide and polyether modified organosiloxane (the viscosity at 25°C is 800~ 2000CP, purchased from Dongguan Hongya Organic Silicon Co., Ltd.), the weight ratio of which is 2.5:1; the foam stabilizer is potassium oleate; the gelling agent is sodium silicofluoride; the active agent is composed of 3 parts by weight of zinc oxide, 1 part by weight of stearic acid, 1.2 parts by weight of sodium 4-octylbenzene sulfonate, and 1 part by weight of sodium cetylbenzene sulfonate; the auxiliary agent consists of 5-10 parts by weight Vulcanization accelerator, 2-15 parts by weight of antioxidant, vulcanization accelerator is TMTD,...

Embodiment 2

[0091] This embodiment provides a natural latex foam product. The raw materials for preparation include latex 100, vulcanizing agent 5, foaming agent 6, foaming agent 5, gelling agent 1.5, active agent 3, and auxiliary materials in parts by weight. Agent 3. Filler 15.

[0092] The protein content of the latex is 0.15wt%; the vulcanizing agent is sulfur; the foaming agent is cetylpyridinium bromide and polyether modified organosiloxane (the viscosity at 25°C is 800~ 2000CP, purchased from Dongguan Hongya Organic Silicon Co., Ltd.), the weight ratio of which is 2.5:1; the foam stabilizer is potassium oleate; the gelling agent is sodium silicofluoride; the active agent is composed of 3 parts by weight of zinc oxide, 1 part by weight of stearic acid, 1.2 parts by weight of sodium 4-octylbenzene sulfonate, and 1 part by weight of sodium cetylbenzene sulfonate; the auxiliary agent consists of 5-10 parts by weight Vulcanization accelerator, 2-15 parts by weight of antioxidant, vulcaniz...

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Abstract

The invention relates to the technical field of latex foamed products, in particular to a method for producing a latex foamed product by using low-protein latex. The natural latex foamed product is prepared from the following raw materials in parts by weight: 100 parts of latex, 2-5 parts of a vulcanizing agent, 0.5-6 parts of a foaming agent, 1-5 parts of a foam stabilizer, 0.5-1.5 parts of a gelatinizing agent, 3-5 parts of an active agent, 3-12 parts of an auxiliary agent and 1-15 parts of a filler. The natural latex in the preparation raw materials of the natural latex foamed product provided by the invention is low-protein natural latex, and has the characteristics of nature, environmental protection, no pollution, no toxicity, antianaphylaxis and the like. Proper amounts of the foamstabilizer and the active agent are added in the production and preparation process of the latex foamed product; meanwhile, the production process parameters are changed, so that the prepared latex foamed product has good foam stability, uniform foam pore size, regular and stable pore structure, few internal defects and the like, the prepared foamed product has good resilience, and the tensile strength, elongation at break, resilience rate and the like are remarkably improved.

Description

Technical field [0001] The invention relates to the technical field of latex foamed products, in particular to a method for producing latex foamed products by using low-protein latex. Background technique [0002] Natural rubber is mainly an elastic solid made of natural rubber latex collected from Brazil rubber trees through coagulation and drying processes. Its rubber hydrocarbon (polyisoprene) content is more than 90%, and it also contains a small amount of protein, fatty acid, sugar and ash. Natural rubber has high elasticity, high strength, wear resistance, tear resistance, acid and alkali resistance, corrosion resistance, excellent insulation, flexibility and other properties. It is widely used in industry and agriculture, national defense, transportation, transportation, machinery manufacturing, medicine The health field and daily life are irreplaceable by other materials. Natural rubber foam material, also called natural latex sponge, is a porous and open low-density ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/02C08L83/12C08K13/02C08K3/22C08K5/42C08K5/09C08K5/3432C08J9/30
CPCC08J9/0023C08J9/0028C08J9/0033C08J9/0066C08J9/0095C08J9/30C08J2307/02C08J2483/12C08K5/09C08K5/3432C08K5/42C08K13/02C08K2003/2296
Inventor 宋亚忠庄晓亮赵立广李瑞鑫桂红星丁丽黄红海李建伟王岳坤
Owner RUBBER RES INST CHINESE ACADEMY OF TROPICAL AGRI SCI
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