CN105000560A - Production process for nano silicon carbide material applied to coating of non-stick pan - Google Patents

Abstract

The invention discloses a production process for a nano silicon carbide material applied to a coating of a non-stick pan. Powder containing silicon carbide is added into a wet ball mill to be ground; detection is performed after grinding; when the particle size meets the requirements, the powder is added into a grinding machine, and water is added according to a mass ratio of slurry to the water of 1:2 at the same time; when the grinding operation is performed by the grinding machine for a certain time, the particle size is detected once until the particle size meets the process requirements; then the powder is driven into a pressure filter by using a pump for pressure filtration; filter cakes obtained by pressure filtration are loaded in a drying box to be dried; and the dried filter cakes are ground, screened through a sieve net, packaged and warehoused. The material production process is simple, low in raw material cost, low in energy consumption, high in product yield and suitable for all non-stick pan industries.

Description

A kind of production technique of the nm-class silicon carbide material for non-stick pan coating layer

Technical field

The present invention relates to technical field of nano material, specifically a kind of production technique of the nm-class silicon carbide material for non-stick pan coating layer.

Background technology

The appearance of " non-stick pan " brings very large convenience to the life of people, and people need not worry when cooking meat again accidentally will burn, and during fried fish, fillet are bonded on pot wall.The external form of this non-stick pan and ordinary pan does not have any relation, only only the internal surface overbrushing one deck tetrafluoroethylene at pot, this well received kitchen utensils that utilized the thermal characteristics of tetrafluoroethylene excellence, chemical property, performance easy to clean and nontoxic performance to make.Tetrafluoroethylene is that " King " has good resistance to chemical attack and ageing-resistant performance by good reputation, and " chloroazotic acid " is also difficult to corrosion.Easily there is catabiosis in ordinary plastic articles, originally looks pretty good thing, spent 3 or five years or will crack about ten years, even broken, can " King " goods of making in outdoor placement, no matter expose to the sun and rain, all have no damage twenty or thirty year.Thus be widely used in life and chemical industry.

" King " is also widely used in industrial absorption tower and corrosion-resistant container, and along with the improvement to " King ", its purposes in the modern life, agricultural, industry, national defence and science and technology will be more and more extensive.At western developed country, non-stick pan generally uses already.In China, the universal of non-stick pan is from the nineties, and the performance of its uniqueness is admitted by increasing human consumer.

Pot products mainly contains aluminum pot, Stainless Steel Kettle, Iron-enamel pot, iron pan and non-stick pan.These pots respectively have relative merits, and wherein the advantage of non-stick pan is the most outstanding.Here is this Performance comparision of several pots:

The characteristic of aluminum pot is that heat distribution is excellent, and heat-transfer effect is 16 times of Stainless Steel Kettle, and pot body is lighter.But aluminum pot not easy cleaning, large with oily many times oil smoke.The characteristic of Stainless Steel Kettle is that heat distribution is bad, easily produces heat build-up point and burning foods.Stainless Steel Kettle pot body weight, non-easy cleaning, with oily many time easily smolder.The heat distribution of Iron-enamel pot is bad, is easily burned at the end.This kind of pot not easy cleaning, surface is easily damaged, causes iron-based material to get rusty.Iron pan heat distribution is bad, easily produces heat build-up point and burning foods, its pot of body weight, non-easy cleaning, easily gets rusty, and large with oily many times oil smoke.

Non-stick pan overcomes all shortcomings of above traditional pot, easy cleaning, one wipes namely completely gently.Non-stick pan can easily be decocted, cooked food and non-sticky end, can reduce with oil to greatest extent, kitchen totally oil smoke less.It can also help the intake reducing fat, has complied with modern and has pursued lower fat, consumption tide low in calories.The most important thing is, it to human body without any harm.

Non-stick pan product can be divided into saucepan, frying pan, frying pan, milk pot by using function difference, can be divided into a layer system, bilaminar system and three-tier system pot by internal surface non-sticky metallic coating system.One layer system refers to the antistick layer be made up of single coating; Bilaminar system refers to the antistick layer be made up of bottom and surface layer two kinds of coating; Three-tier system refers to the antistick layer be made up of bottom, middle level and surface layer 3 kinds of coating.Enamel, heat resistance paint, polishing non-stick pan can be divided into by product external surfaces treatment process.

National standard " food product containers inwall teflon coating hygienic standard " and " Al and Alalloy non-stick pan " industry standard: " standard makes to be used as two restrictions to non-stick pan; one is that non-stick pan can not make acidic food, and two is that use temperature will be limited in less than 250 DEG C; Non-stick pan coating layer adds that other sintering adjuvants form by tetrafluoroethylene, this standard is for checking the quality of coating to set, meanwhile, and the qualifications when condition that it limits also is every day use non-stick pan, and many in the production process floating coat number of plies of non-stick pan, manufacturing process is complicated.”

Current non-stick pan coating layer does not also use carbofrax material to do the precedent of coating.

Summary of the invention

The object of the present invention is to provide a kind of production technique of the nm-class silicon carbide material for non-stick pan coating layer, to solve the problem proposed in above-mentioned background technology.

For achieving the above object, the invention provides following technical scheme:

For a production technique for the nm-class silicon carbide material of non-stick pan coating layer, concrete preparation process is as follows:

(1) be 80 ~ 90% by mass content, granularity 10 ~ 100 μm of carborundum powders join in wet-type ball mill and grind, and detect after grinding 8 ~ 10h, granularity reaches 5 ~ 8 μm;

(2) the material oar that above-mentioned grinding produces is joined in shredder, add water with quality than for 1:2 by material oar simultaneously;

(3) shredder often grinds 10 ~ 15h, detects once granularity, until granularity reaches 0.5 ~ 1 μm;

(4) satisfactory material oar pump is squeezed into pressure filter and carry out press filtration;

(5) filter cake that press filtration obtains loads in drying baker dries, and dry the temperature inside the box and control at 120 ~ 140 DEG C, drying time is 11 ~ 13h;

(6) filter cake after oven dry is pulverized, then packaging warehouse-in after 400 ~ 500 eye mesh screens screenings.

Compared with prior art, the invention has the beneficial effects as follows: material producing process of the present invention is simple, and material cost is low, consume energy little, product yield is high, is applicable to all non-stick pan industries, directly applied by nm-class silicon carbide material and sinter in the bottom of a pan, preparation technology is simple.

Accompanying drawing explanation

Fig. 1 is preparation flow figure of the present invention.

Embodiment

Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.

Refer to Fig. 1, for the schema of the production technique of the nm-class silicon carbide material of non-stick pan coating layer, concrete preparation process is as follows:

(1) raw material adopts the dust-removing powder in silicon carbide production process, and silicon carbide mass content is 80 ~ 90%, and granularity 10 ~ 100 μm, joins raw material in wet-type ball mill and grind, and detect after grinding 9h, granularity reaches 5 μm;

(2) the material oar that above-mentioned grinding produces is joined in shredder, add water with quality than for 1:2 by material oar simultaneously;

(3) shredder often grinds 12h, detects once granularity, until granularity reaches 0.5 ~ 1 μm;

(4) satisfactory material oar pump is squeezed into pressure filter and carry out press filtration;

(5) filter cake that press filtration obtains loads in drying baker dries, and dry the temperature inside the box and control at 130 DEG C, drying time is 12h;

(6) filter cake after oven dry is pulverized, then packaging warehouse-in after 450 eye mesh screens screenings.

Above-mentioned nm-class silicon carbide material is applied to non-stick pan material, and disposable sintering after nanometer silicon carbide material is directly coated with and invests pot internal surface in non-stick pan production process, does not make used additives.

1, nanometer silicon carbide has good thermostability, and 2000 DEG C chemical transformation can not occur, and non-stick pan dry combustion method also can not reach this temperature, labile problem when solving Teflon high temperature (250 ° of more than C);

2, nanometer silicon carbide has good erosion resistance, overcomes the shortcoming that Teflon can not use under sour environment;

3, nanometer silicon carbide size distribution is invalid, ensures the homogeneity of coat-thickness, only needs coated 20 ~ 25 μm of thickness just can reach the intensity of Teflon threeply degree;

4, carbofrax material itself has good thermal conductivity, ensure that coating heat distribution is even.

To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present invention or essential characteristic, the present invention can be realized in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present invention is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the present invention.Any Reference numeral in claim should be considered as the claim involved by limiting.

Claims (1)

1. for a production technique for the nm-class silicon carbide material of non-stick pan coating layer, it is characterized in that, concrete preparation process is as follows:

(1) be 80 ~ 90% by mass content, granularity 10 ~ 100 μm of carborundum powders join in wet-type ball mill and grind, and detect after grinding 8 ~ 10h, granularity reaches 5 ~ 8 μm;

(2) the material oar that above-mentioned grinding produces is joined in shredder, add water with quality than for 1:2 by material oar simultaneously;

(3) shredder often grinds 10 ~ 15h, detects once granularity, until granularity reaches 0.5 ~ 1 μm;

(4) satisfactory material oar pump is squeezed into pressure filter and carry out press filtration;

(5) filter cake that press filtration obtains loads in drying baker dries, and dry the temperature inside the box and control at 120 ~ 140 DEG C, drying time is 11 ~ 13h;

(6) filter cake after oven dry is pulverized, then packaging warehouse-in after 400 ~ 500 eye mesh screens screenings.