Ceramic hand mold for production of nitrile rubber and pvc gloves and preparation method thereof

A technology of nitrile rubber and gloves, applied in the field of ceramic hand molds and their preparation, can solve the problems of high shrinkage rate, weak thermal shock resistance, low production qualification rate, etc. The effect of long life and improved product qualification rate

Active Publication Date: 2017-01-18
保定贸正劳保用品制造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, the requirements for ceramic hand molds of PVC gloves are becoming more and more stringent, and each hand mold needs to go through cumbersome post-processing procedures after use.
[0003] SiO in the chemical composition of the ceramic hand mold produced by the existing raw material formula 2 The content of silicon is generally greater than 60%, which is a high-silicon ceramic hand mold, which has the following disadvantages: 1) The pass rate of the product is low, about 85%; 2) The total shrinkage rate of the product is high, 13-18%; 3 ) The surface of the product is uneven, with concave-convex shallow pits, black spots, etc.; 4) The service time is short, and the ceramic hand mold produced by the prior art has an online service life of 3 months in the production of nitrile rubber gloves; 5) Thermal shock resistance Sex is not strong
[0004] Disclosed in CN200510012768.1 is a kind of ceramic hand mold suitable for the production of nitrile rubber gloves and its preparation method, which adopts the method of oxidizing flame firing to sinter the green body, and the qualified rate of the ceramic hand mold product obtained is reduced from the original 85% increased to 95%; it can be used online for 6-12 months in the production of nitrile rubber gloves, but in order to improve market competitiveness, there is still room for improvement in the microcrystalline phase structure of ceramic hand molds, ceramic hand mold products Qualification rate, thermal shock resistance and online service life, etc. need to be further improved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Ingredients according to the following formula: raw material formula: 6% of quartz, 12% of feldspar, 45% of cooked Datong soil, 4% of Fangzi soil, 2% of Suzhou soil, 10% of cooked bauxite, 8% of cooked talc, α -Al 2 o 3 13%, send the prepared material into the ball mill and add water to grind for 38 hours to make mud;

[0046] (2) The mud obtained in step (1) is passed through a 300-mesh vibrating screen, so that the fineness of the mud is 300 mesh, and the sieve allowance is 0.01%, and then put into the mud filter through the permanent magnetic iron remover, and used in the mud filter Industrial filter cloth separates mud cake;

[0047] (3) add and account for the water stirring of 40% of raw material formula gross weight in step (2) gained mud cake, and add respectively account for soda ash and water glass of raw material formula gross weight 0.3%, beat into mud, the specific gravity of mud is 1.7g / cm 3 , and then after the second iron removal treatment, the ...

Embodiment 2

[0052] Preparation method is identical with embodiment 1, and difference is raw material formula:

[0053] Quartz 8%, feldspar 15%, cooked Datong soil 32%, Fangzi soil 16%, Suzhou soil 3%, cooked bauxite 14%, cooked talc 2%, α-Al 2 o 3 10%.

[0054] The chemical composition weight content of the finished ceramic hand mold is: SiO 2 44.25%, Al 2 o 3 47.45%, Fe 2 o 3 0.27%, Fe 2 o 3 0.25%, TiO 2 0.41%, CaO 0.44%, MgO 0.48%, K 2 O 3.85%, Na 2 O1.60%, loss on ignition 1.00%. The total shrinkage of the hand mold was 13%.

Embodiment 3

[0056] Preparation method is identical with embodiment 1, and difference is raw material formula:

[0057] Quartz 6%, feldspar 12%, cooked Datong soil 32%, Fangzi soil 4%, Suzhou soil 2%, cooked bauxite 10%, cooked talc 4%, α-Al 2 o 3 30%.

[0058] The chemical composition weight content of the finished ceramic hand mold is: SiO 2 31.20%, Al 2 o 3 58.30%, Fe 2 o 3 0.37%, TiO 2 0.25%, CaO 0.34%, MgO 0.52%, K 2 O 2.58%, Na 2 O 1.57%, loss on ignition 4.87%. The total shrinkage of the hand mold was 12%.

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Abstract

The invention relates to a ceramic hand model for producing nitrile rubber and PVC (polyvinyl chloride) gloves and a preparation method of the ceramic hand model, belonging to the technical field of dipped ceramic hand model production. The ceramic hand model comprises the following raw materials in percentage by weight: 6%-8% of quartz, 12%-22% of feldspar, 32%-45% of prepared Datong soil, 4%-16% of Fangzi soil, 2%-3% of Suzhou soil, 10%-30% of prepared bauxite, 2%-8% of prepared talcum and 10%-30% of alpha-Al2O3. The ceramic hand model for producing nitrile rubber and PVC gloves, prepared by adopting the method, has the advantages of long online service life, good acid and alkali corrosion resistance, good thermal shock resistance and the like; a blank body is sintered by adopting a reduction flame sintering process, and the method is simple and feasible and is favorable for realizing industrialization.

Description

technical field [0001] The invention relates to a ceramic hand mold used for the production of nitrile rubber and PVC gloves and a preparation method thereof, belonging to the technical field of production of dipped ceramic hand molds. Background technique [0002] The hand mold is a hand mold used to produce plastic gloves by dipping method. The production process of various liquid-formed plastic gloves is: dip the plastic liquid material on the ceramic hand mold, dry and demould. The hand molds used in production should be acid-resistant, alkali-resistant, chemical-resistant, and have a certain thermal shock resistance. Various liquid materials have different requirements on the corrosion resistance of ceramic hand molds. Among them, the requirements for ceramic hand molds with nitrile rubber gloves are the most stringent: after each hand mold is used, it is first sprayed with an acidic lotion with a pH of 3. After showering and cleaning, it is then sprayed with an alkal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/185C04B35/622
Inventor 姜宝姜霁洋
Owner 保定贸正劳保用品制造有限公司
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