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Preparation method for non-blooming natural rubber gloves

A technology of natural rubber and natural latex, which is applied in the field of natural rubber glove preparation, can solve the problems affecting the performance, easy-spraying surface, and restrictions, and achieve the effect of improving the quality of rubber products and reducing sulfur precipitation

Active Publication Date: 2018-08-24
SHANDONG XINGYU GLOVES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its own characteristics of non-polar rubber, the solubility of the dissolution aid is very low. The aid used in the processing process is easy to spray out of the surface, forming blooming, affecting the appearance, and in severe cases, affecting the performance
Although there are many methods for making latex gloves without frost spraying, such as resin vulcanization, radiation vulcanization, and peroxide vulcanization, these vulcanization methods have major disadvantages: (1) The overall vulcanization degree of resin vulcanization is shallow, reaching (2) Radiation vulcanization can only be carried out within the scope of special laboratories, and cannot be applied on a large scale in factories or workshops; (3) Although peroxide vulcanization is feasible, there are disadvantages. Few problems and risks, process control is difficult, so the large-scale application of process in the production workshop is limited

Method used

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  • Preparation method for non-blooming natural rubber gloves

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Step S1, preparation of pre-vulcanized natural rubber latex: 5 parts by weight of the first vulcanizing agent bromomethylol phenolic resin, 1.2 parts of the second vulcanizing agent thiuram TRA (thiuram disulfide), 1 part vulcanization Accelerator zinc diethyldithiocarbamate ZDC, mixed into 100 parts of natural rubber latex (dispersion with a solid content of 60%), pre-vulcanized at a temperature of 65 ° C for 4 hours, and parked for 1 day;

[0039] Step S2, preparation of dipping mortar: by weight, take 100 parts of pre-vulcanized natural rubber latex prepared by step S1, mix with 0.5 part of active agent zinc oxide, and add thickener CMC (2% by mass) to prepare the viscosity 2000mpa.s impregnation mortar;

[0040] Step S3, dipping the glove embryo: soak the chemical fiber knitted glove embryo body at 50°C in 2% calcium nitrate methanol solution coagulant, and perform the dipping coagulant treatment; then immerse the glove embryo into the dipping glue prepared in step ...

Embodiment 2

[0043] Step S1, preparation of pre-vulcanized natural rubber latex: 8 parts by weight of the first vulcanizing agent chlorinated hydroxymethyl phenolic resin, 0.5 parts of the second vulcanizing agent triazine sodium salt (2,4,6-trimercapto-1, 3,5-triazine trisodium salt), 2 parts of vulcanization accelerator DETU and accelerator D (1:1 weight combination), mixed in 120 parts of natural rubber latex (dispersion of solid content 60%), at a temperature of 70 Precure for 2 hours at ℃ and park for 2 days;

[0044] Step S2, preparation of dipping mortar: by weight, take 120 parts of pre-vulcanized natural rubber latex prepared by step S1, mix with 1.5 parts of active agent zinc carbonate, and add thickener CMC (2% by mass) to prepare viscosity 1800mpa.s impregnation mortar;

[0045] Step S3, dipping the glove embryo: soak the chemical fiber knitted glove embryo body at 55°C in 5% calcium nitrate ethanol solution coagulant, and perform the dipping coagulant treatment; then immerse ...

Embodiment 3

[0048] Step S1, preparation of pre-vulcanized natural rubber latex: 2 parts by weight of the first vulcanizing agent brominated hydroxymethyl phenolic resin, 4 parts of the second vulcanizing agent thiurams TRA (thiuram polysulfide), 0.5 parts of vulcanization Accelerator DPG (1,3-diphenylguanidine), mixed into 90 parts of natural rubber latex (dispersion with a solid content of 60%), pre-vulcanized at a temperature of 50 ° C for 5 hours, and parked for 1 day;

[0049] Step S2, preparation of dipping glue: by weight, take 100 parts of prevulcanized natural rubber latex prepared in step S1, mix with 0.5 parts of active agent zinc oxide and zinc stearate (8:2 weight), and add thickening The agent PVA is blended into an impregnated mortar with a viscosity of 1700mpa.s;

[0050] Step S3, dipping the glove embryo: directly immersing the cotton wool glove embryo into the dipping glue prepared in step S2;

[0051] Step S4, vulcanization drying: first pre-vulcanization and drying at ...

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Abstract

The invention relates to a preparation method for non-blooming natural rubber gloves. The method comprises the following steps: step 1, preparing pre-vulcanized natural latex: mixing 2-8 parts by weight of a first vulcanizing agent, 0.5-4 parts by weight of a second vulcanizing agent and 0.5-2 parts by weight of a vulcanization accelerant into 90-120 parts by weight of natural latex, performing pre-vulcanization at temperature of 40-80 DEG C for 1-10 h, and performing normal-temperature placing, wherein the first vulcanizing agent is a resin vulcanizing agent, and the second vulcanizing agentis a thiuram or a triazine sodium salt; step 2, preparing impregnating rubber slurry: taking 90-120 parts by weight of the pre-vulcanized natural latex prepared in the step 1, mixing the taken pre-vulcanized natural latex and 0.5-1.5 parts by weight of an active agent, and performing adjustment to predetermined viscosity by adding a thickening agent; step 3, performing gum impregnation on glove blanks: impregnating the glove blanks into the impregnating rubber slurry prepared in the step 2; and step 4, performing vulcanizing drying: preparing the non-blooming natural rubber gloves. According to the method provided by the invention, the natural rubber gloves prepared by the method have no blooming phenomena when being placed indoors for one year, and the EN388 test level reaches 3141.

Description

technical field [0001] The invention relates to a preparation method of natural rubber gloves, in particular to a preparation method of non-spraying natural rubber gloves. Background technique [0002] Natural latex gloves are comfortable and soft to the touch, durable and practical, so they are widely loved by consumers. However, due to its own characteristics of non-polar rubber, the solubility of the dissolution aid is very low. The aid used in the processing process is easy to spray out of the surface, forming blooming, affecting the appearance, and in severe cases, affecting the performance. Although there are many methods for making non-blooming latex gloves, such as resin vulcanization, radiation vulcanization, and peroxide vulcanization, these vulcanization methods have major disadvantages: (1) The overall vulcanization degree of resin vulcanization is shallow, reaching (2) Radiation vulcanization can only be carried out within the scope of special laboratories, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/02C08L7/02C08L61/14C08K13/02C08K5/40C08K5/37C08K5/3492
CPCC08J5/02C08J2307/02C08J2461/14C08K5/34928C08K5/378C08K5/40C08K13/02C08L61/14
Inventor 周星余孙永峰黄文旭
Owner SHANDONG XINGYU GLOVES
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