CN103360721A - Environment-friendly plastic and production method thereof - Google Patents

Abstract

The invention discloses an environment-friendly plastic, a production method, a production process of modified thermosetting resins and a formula of the environment-friendly plastic. The plastic has higher strength and better appearance, is non-toxic and harmless and is low in cost. The formula comprises 3-13 parts of melamine, 7-30 parts of formaldehyde aqueous solution, 2-15 parts of urea, 0.5-3 parts of aids, 10-85 parts of filling material and a defined amount of caustic soda and water in parts by weight, wherein the filling material is the mixture of plant fibers or husks, bone powder, carapace powder, starch and an inorganic oxide. The production method of the environment-friendly plastic comprises the steps of carrying out synthetic reaction on melamine, formaldehyde aqueous solution and urea, adding various aids, putting the materials into a kneading machine after the synthetic reaction is completed, adding the filling material, directly putting the mixture into a forming machine to undergo hot-press forming after fully stirring and mixing the materials or putting the mixture at 85-100 DEG C for several hours according to the forming requirements. The material can be used for producing top-grade tableware, artworks, decorative building materials and the like, has good appearance and high strength, and is environment-friendly, economical and durable.

Description

Environment-friendly type plastic and production method thereof

Technical field:

The present invention relates to the plastics field, relate in particular to environmentally-friendly plastic and production method thereof.

Background technology:

Propelling along with human civilization, people's environmental consciousness is more and more stronger, requirement green to clothing, food, lodging and transportion--basic necessities of life, environmental protection is also more and more higher, and the plastics of pressing close to people's life enjoy human consumer's concern especially, research staff's many nontoxic, harmless, pollution-free, degredation plastic new variety that released one after another are because its machine-shaping is convenient, bright in luster, cost is low, extensively should be in fields such as furniture building materials and ornaments, daily artwork, tablewares.Utilizing vegetable fibre, paddy shell, carapace powder, starch and inorganic oxide etc. to improve thermosetting resin, is exactly the class in nontoxic, the harmless plastics.

Summary of the invention:

The raw material of environment-friendly type plastic of the present invention is trimeric cyanamide, formalin, urea, auxiliary agent, caustic-soda aqueous solution and packing material.Described packing material be vegetable fibre or paddy shell, bone meal, starch and with the mixture of inorganic oxide, and the weight ratio of mixture of vegetable fibre or paddy shell, bone meal powder, starch and inorganic oxide is 50-90: 6-20, described inorganic oxide is selected from calcium oxide, magnesium oxide or aluminum oxide, and described auxiliary agent is trolamine, urotropine, glycerine, magnesiumcarbonate, Resorcinol, sodium naphthalene sulfonate and Zinic stearas.Material after the building-up reactions is put into kneader, adds packing material, fully mixes, and obtains a kind of existing higher intensity, preferably sense organ is arranged again, the environment-friendly type plastic nontoxic, harmless, that cost is low.

Technical scheme of the present invention is achieved in that the contriver through the experimental study of long period, to the proportioning of thermosetting resin and packing material, and the adding technology of packing material, packing material the better scheme that proposed such as select.In environment-friendly type plastic and the production method, the parts by weight of raw material are: trimeric cyanamide 5-15, formalin 7-30, urea 2-15, auxiliary agent 0.5-3, packing material 10-85, caustic-soda aqueous solution is an amount of, and said trimeric cyanamide and urea are that its content is the solid more than 95% here, and formalin is that its content is 37% formalin, such as content change is arranged, then will do to want corresponding adjustment to proportioning.Production process is: at first add formalin, regulating the pH value with caustic-soda aqueous solution is 7.8-8.5, add trimeric cyanamide and urea again, stir and be warmed up to more than 80 degree, the insulation of 80-90 degree is 40 minutes again, add afterwards auxiliary agent, be incubated final vacuum dehydration in 10 minutes, the material after the dehydration is put into kneader, add packing material, fully mix, obtain the environment-friendly type plastic product.It is hot-forming perhaps directly compound to be put into forming machine, or according to the moulding needs, places a few hours in the temperature of 85-100 degree.

Above-mentionedly in the temperature of 85-100 degree Celsius, place a few hours, refer to after thermosetting resin and packing material fully mix, material is positioned in the baking oven of 85-90 degree about three hours, material dry rarefaction, also available roller roll-in, roller temperature is at the 90-100 degree, through ceaselessly roll-in of roller, material changes sheet gradually into, cooled flap, through pulverizing, and then it is for subsequent use to be finished product with the pulverizing of 1.8-2mm sieve circle.

Beneficial effect:

1, the present invention namely adds packing material behind the thermosetting resin end of synthesis, has saved drying, pulverizing in the thermosetting resin production technique, avoids adding packing material dipping incomplete mixing, has saved cost, has improved production efficiency.

2, because packing material is vegetable fibre or paddy, shell powder etc., also added simultaneously inorganic oxide, such as calcium oxide, magnesium oxide and aluminum oxide, improved the intensity of finished product, and made finished product any surface finish, attractive in appearance.

3, improve performance intensity than single with vegetable fibre or paddy, shell powder finished product owing to add oxide compound, enlarged the use range of such material.

Embodiment:

Embodiment 1: get in an amount of adding instead of 30 kilograms of formalins and water, stirred about 5 minutes, regulate PH=7.8-8.5 with caustic soda, add 11 kilograms of trimeric cyanamides, 3.5 kilograms in urea, continuation is stirred and was warmed up in 15-20 minute more than 80 degree, 80-90 degree insulation 40 minutes, add 0.15 kilogram of trolamine, 0.1 kilogram of urotropine, 0.2 kilogram of glycerine, 0.1 kilogram in magnesiumcarbonate, 0.2 kilogram of Resorcinol, 0.2 kilogram of sodium naphthalene sulfonate, 0.15 kilogram of Zinic stearas etc. is in 80-90 degree insulated and stirred after 10 minutes, vacuum hydro-extraction (about 10 minutes), material is put into kneader, under whipped state, add successively 30 kilograms in shell powder, take bone meal as 15 kilograms in main calcium oxide, 5 kilograms in magnesium oxide fully mixes and stirs (about about 2-5 minute), directly enters the mould heat pressure moulding, or material put into baking oven, oven temperature remains on the 85-90 degree, places about three hours, and it is dry that material namely is, rarefaction, naturally cool to room temperature, material is taken out pulverize for subsequent use with 1.8-2mm sieve circle.Can make of this material, imitative porcelain jadeware ware, medium-to-high grade food and drink tool, artwork, decorative building material etc., sense organ is good, and intensity is high, not only environmental protection, but also economy and durability.

Embodiment 2: get 20 kilograms of formalins and add in the reaction, technique such as above-mentioned adds 9.5 kilograms of trimeric cyanamides, and rest materials weight is constant, after building-up reactions finishes, and through vacuum hydro-extraction.Get 25 kilograms of this materials and put into kneader, under whipped state, add successively 69 kilograms in waste cotton flaxen fiber powder, 6 kilograms in magnesium oxide, following operating process is as described in Example 1.Can manufacture high strength with this material, shock resistance, the stretching resistance labour safety product, attractive in appearance, generous, fall not badly, also can make food and drink tool, the environmental protection such as artwork, economy, material benefit.

Can also use farm crop tangerine bar, add starch and make packing material, mix in right amount inorganic oxide, produce environment-friendly type plastic, use this craft articles, household utensils, decorative building material etc. not only have above-mentioned advantage, and raw material sources are extensive, and are with low cost.

Claims (2)

1. environment-friendly type plastic, it is characterized in that the raw material for preparing this environment-friendly type plastic is: trimeric cyanamide, formalin, urea, auxiliary agent, caustic soda and packing material, wherein the parts by weight of each component are respectively: trimeric cyanamide 3-13, formalin 7-30, urea 2-15, auxiliary agent 0.5-3, packing material 10-85, described packing material is vegetable fibre or paddy shell, bone meal, the mixture of starch and inorganic oxide, and vegetable fibre or paddy shell, bone meal, the weight ratio of starch and inorganic oxide is 50-90: 6-20, described inorganic oxide is selected from calcium oxide, magnesium oxide or aluminum oxide, described auxiliary agent are trolamine, urotropine, glycerine, magnesiumcarbonate, Resorcinol, sodium naphthalene sulfonate and Zinic stearas.

2. method for preparing the described environment-friendly type plastic of claim 1, it is characterized in that at first adding formalin, regulating the pH value with caustic soda is 7.8-8.5, adds trimeric cyanamide and urea again, stir and be warmed up to more than 80 degree, the insulation of 80-90 degree is 40 minutes again, adds afterwards auxiliary agent, is incubated final vacuum dehydration in 10 minutes, material after the dehydration is put into kneader, add packing material, fully mix, obtain the environment-friendly type plastic product.