CN102528881B - Vegetable fiber tableware and preparation method thereof - Google Patents
Vegetable fiber tableware and preparation method thereof Download PDFInfo
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- CN102528881B CN102528881B CN201110421315.XA CN201110421315A CN102528881B CN 102528881 B CN102528881 B CN 102528881B CN 201110421315 A CN201110421315 A CN 201110421315A CN 102528881 B CN102528881 B CN 102528881B
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Abstract
The invention provides a vegetable fiber tableware and a preparation method of the tableware. The method comprises the following steps: mixing raw materials uniformly, hot pressing and molding to obtain vegetable fiber shell, wherein the raw materials comprise bamboo fiber powder, corn starch, urea formaldehyde resin and rice husk with weight ratio of (4-6):(0.5-2): 2-4):1; polishing the surface of the vegetable fiber shell; spraying or soaking water soluble paint to the surface of the polished vegetable fiber shell, and then drying to finally obtain the vegetable fiber tableware. In the method, bamboo fiber powder, corn starch, urea formaldehyde resin and rice husk are used as raw materials, a shell is formed firstly by hot pressing, then a layer of water soluble paint protection film is coated at the surface of the shell, finally the tableware is obtained. The vegetable fiber tableware prepared by the method is coated with the water soluble paint protection film at the surface, the external water and other solvent are hard to permeate into the vegetable fiber shell under the protection of the water soluble paint film. In this way, the waterproof property and the fading resistance of the tableware are improved.
Description
Technical field
The present invention relates to catering field, particularly a kind of plant fiber tableware and preparation method thereof.
Background technology
Tableware is the necessity that people live.In recent years along with the develop rapidly of economy, the rhythm of life of people is also accelerated day by day, and fast service restaurant industry is developed in proper order, and this also causes the demand of market to dinner ware constantly to increase.Traditional dinner ware mostly is foaming plastic tableware, often use foaming plastic tableware can form injury to health, and it not easily carries out post processing, easily to environment.
In order to improve security and the environmental-protecting performance of tableware use, string in prior art, is utilized to prepare tableware.Plant fiber tableware is with wheat straw, guide groove or corn etc. for raw material, and after dividing institute, obtain string, then in string, be mixed into appropriate amount of addition agent as binding agent releasing agent etc., rear injection mould, utilizes dry pressing compressing at high temperature under high pressure.Because string has good biodegradability, and can not produce harmful material, therefore plant fiber tableware more and more receives the concern of people.In addition, relative to pulp mould tableware, its raw material sources are extensive, do not need to consume timber completely, are conducive to the cost reducing tableware.
Though plant fiber tableware possesses above-mentioned advantage, but its shortcoming is:
First is for dyeing product, and it easily fades, and this is the absorption completely because string cannot realize pigment powder, after tableware meets water or other solvents, color powder easily by water or other solvents dissolve, cause product to fade.
Second is that surface is easily softening, and this is mainly poor due to plant fiber tableware resistance to water, and when after itself and water Long Term Contact, water can infiltrate tableware inside, causes tableware softening and cannot use.
Above-mentioned two shortcomings of string seriously limit its extensive use at catering industry.Therefore, need to provide a kind of water resistance excellent and plant fiber tableware not easy to fade.
Summary of the invention
The technical problem that the present invention solves is to provide plant fiber tableware that a kind of water resistance is good and preparation method thereof.
In view of this, the invention provides a kind of preparation method of plant fiber tableware, comprising:
A), by raw material mix rear hot briquetting, obtain string housing; Described raw material comprises weight ratio for (5 ~ 6): (0.5 ~ 2): (2 ~ 4): the bamboo fibre powder of 1, cornstarch, Lauxite and cavings;
B), grinding process is carried out to the surface of described string housing;
C) the string surface of shell spraying, after polishing or dip-coating water-based are unaware of post-drying, obtain plant fiber tableware.
Preferably, the particle diameter of described bamboo fibre is 40 order ~ 80 orders.
Preferably, described hot-forming temperature is 140 DEG C ~ 160 DEG C.
Preferably, described hot-forming pressure is 10Mpa ~ 20Mpa.
Preferably, it is 100 that described water-based paint vehicle comprises weight ratio: the bi-component waterborne paint of (10 ~ 20) and water, and described bi-component waterborne enamel-cover draws together resin Composition and curing agent component.
Preferably, described water-based paint vehicle is prepared as follows:
Carry out stirring at low speed and high-speed stirred with this after described resin Composition, curing agent component and water being mixed, obtain water-based paint vehicle;
The speed of described stirring at low speed is 150rpm ~ 200rpm, and the speed of high-speed stirred is 500rpm ~ 600rpm.
Preferably, the temperature of described oven dry is 70 DEG C ~ 80 DEG C.
Preferably, described raw material also comprises color powder.
Preferably, also comprise before step b: the step of string housing being carried out to corner finishing.
Accordingly, the present invention also provides a kind of plant fiber tableware, comprising:
String housing and the water-based paint film being overlying on described string surface of shell;
Described string housing comprises: weight ratio is weight ratio is (4 ~ 6): (0.5 ~ 2): (2 ~ 4): the bamboo fibre powder of 1, cornstarch, urea-formaldehyde resin powder and cavings.
The invention provides a kind of preparation method of plant fiber tableware, the method is with bamboo fibre powder, cornstarch, cavings and Lauxite for raw material hot pressing string housing, spraying or dip-coating water-based paint vehicle after then polishing to string surface of shell.In raw material, the free formaldehyde that in hot pressing, Lauxite produces is adsorbed in bamboo fibre powder and cornstarch acting in conjunction, and bamboo fibre powder also contributes to the hardness improving string housing, avoids string housing to deform after painting with before drying.The cavings oil contained in cavings contributes to increasing the mobility of raw material in hot-briquetting modeling process, contributes to the shaping of raw material.At string surface of shell spraying water-based paint vehicle and after drying, string surface of shell forms one deck water-based paint film, this water-based paint film can by string housing and external environment isolated, improve the water resistance of tableware.For the plant fiber tableware of dyeing, under the protection of water-based paint film, the pigment on string also not easily oozes out, and makes product not fugitive color thus.
Accompanying drawing explanation
Fig. 1 is the profile of mess-tin plant fiber tableware.
Detailed description of the invention
In order to understand the present invention further, below in conjunction with embodiment, the preferred embodiment of the invention is described, but should be appreciated that these describe just for further illustrating the features and advantages of the present invention, instead of limiting to the claimed invention.
The embodiment of the invention discloses a kind of preparation method of plant fiber tableware, comprise the steps:
A), by raw material mix rear hot-forming, obtain string housing; Described raw material comprises weight ratio for (4 ~ 6): (0.5 ~ 2): (2 ~ 4): the bamboo fibre powder of 1, cornstarch, urea-formaldehyde resin powder and cavings;
B), grinding process is carried out to the surface of described string housing;
C) the string surface of shell spraying, after polishing or dip-coating water-based paint vehicle post-drying, obtain plant fiber tableware.
Said method is with bamboo fibre powder, cornstarch, cavings and Lauxite for raw material, and first hot pressing forms housing, then covers one deck water paint diaphragm at surface of shell and obtains tableware.Plant fiber tableware surface obtained by this method is covered with water-based paint film, and under the protection of this water-based paint film, extraneous water and other solvents not easily infiltrate in string housing, improve the water resistance of tableware.
Step a is the process preparing string housing, this housing with bamboo fibre powder, cornstarch, urea-formaldehyde resin powder and cavings for raw material.Lauxite is the polymer that urea and formolite reaction obtain, and it is as binding agent, for bamboo fibre powder, cornstarch and cavings being firmly bonded to one.
Easily produce free formaldehyde after Lauxite heating, in order to reduce the content of free formaldehyde, the present invention adds bamboo fibre powder and cornstarch in raw material.The present inventor finds: bamboo fibre powder and cornstarch have remarkable effect with the use of to the absorption of free formaldehyde.For this reason, the present invention adds bamboo fibre powder and cornstarch in raw material, and both controlling, weight ratio is (4 ~ 6): (0.5 ~ 2), reduces the content of tableware Free-formaldehyde thus, improves the security that tableware uses.The weight ratio of bamboo fibre powder and cornstarch is more preferably 5: 1.
Meanwhile, the present invention selects the object of bamboo fibre powder to be also: it has higher hardness, not yielding.In follow-up spraying or dip-coating water-based paint vehicle process, water-based paint vehicle contains a small amount of moisture, and the product that the characteristic of bamboo fibre high rigidity makes surface be covered with water-based paint vehicle before baking weak and limp distortion not easily occurs, and improves yield rate.The particle diameter of the bamboo fibre powder that the present invention adopts is preferably 40 order ~ 80 orders.
Cornstarch in raw material, except for adsorbing except free formaldehyde, can also, as dispersant, make stock dispersion more even.The effect adding cavings in raw material is: it contains cavings oil, and under hot pressing condition, cavings oil flows out from cavings inside, increases the mobility of material, contributes to material forming.
Carry out hot pressing after being mixed by above-mentioned raw materials, just can obtain string housing.In hot pressing, preferably arranging pressure is 10MPa ~ 20MPa, is more preferably 12MPa ~ 18MPa.Temperature is preferably set to 140 DEG C ~ 160 DEG C, is more preferably 145 DEG C ~ 155 DEG C.
Can obtain string housing according to step a, but its resistance to water is poor, the present invention, in order to improve the water resistance of tableware, needs to carry out surface finish and japanning process according to step b and step c successively to string housing.
Wherein, step b is the process of string housing being carried out to surface finish, it is smooth that the effect of polishing is to make string surface of shell, and being conducive to paint vehicle in follow-up painting process can be uniformly dispersed at string surface of shell, and improves the adhesive force of paint vehicle at surface of shell.
Before carrying out step b, the present invention also preferably carries out the step of string housing being carried out to corner finishing.Corner is revised and can be carried out according to method well known to those skilled in the art, concrete as: adopt trimmer or the corner of file to string housing to repair.
Just the operation can painted after carrying out surface finish according to step b to string housing, what the present invention selected to be easy to degrade carries out spraying or dip-coating with the excellent water-based paint vehicle of security performance, more preferably adopts the water-based paint vehicle of food-grade.Preferably, the water paint in above-mentioned water-based paint vehicle preferably adopts the water paint of two component, and namely comprise resin Composition and curing agent component, it is 100 that this water-based paint vehicle comprises weight ratio: the bi-component waterborne paint of (10 ~ 20) and water.Above-mentioned water paint has higher hardness of paint film, and moisture controls to be to make paint vehicle have rate of drying faster in the object of 10% ~ 20%, and avoid moisture to infiltrate housing that string housing too much causes feels like jelly distortion.In water-based paint vehicle, the weight ratio of water and water paint is preferably (13 ~ 28): 100.
For the water-based paint vehicle be made up of bi-component waterborne paint, this water-based paint vehicle preferably configures as follows and forms:
Carry out stirring at low speed and high-speed stirred successively after described resin Composition, curing agent and water being mixed, obtain water-based paint vehicle; Stirring at low speed speed is 150rpm ~ 200rpm; The speed of high-speed stirred is 500rpm ~ 600rpm.
Be conducive to avoiding the overreact in advance of resin and curing agent by slow extremely fast agitating mode and affect paint film mechanical property.
Dry in the spraying of string surface of shell or the laggard row of dip-coating water-based paint vehicle, the moisture evaporation in drying course in paint vehicle, paint vehicle solidify to form water-based paint film, thus obtained plant fiber tableware.
In order to give plant fiber tableware with particular color, raw material also preferably includes color powder.Because this tableware surface is covered with water-based paint film, therefore, color powder not easily infiltrates in string housing, and product is fugitive color not.
Plant fiber tableware obtained according to the method described above, its string housing and the equal degradable of water-based paint film, after above-mentioned string meal arrives its service life, bury soil after can being carried out fragmentation and degrade.Therefore, this product convenient post-treatment environmental protection.
From such scheme, the present invention first with bamboo fibre powder, cornstarch, cavings and Lauxite for raw material hot pressing string housing, after then string surface of shell being polished spraying or dip-coating water-based paint vehicle.In raw material, the free formaldehyde that in hot pressing, Lauxite produces is adsorbed in bamboo fibre powder and cornstarch acting in conjunction, and bamboo fibre powder also contributes to the hardness improving string housing, avoids string housing to deform after painting with before drying.The cavings oil contained in cavings contributes to increasing the mobility of raw material in hot-briquetting modeling process, contributes to the shaping of raw material.At string surface of shell spraying water-based paint vehicle and after drying, string surface of shell forms one deck water-based paint film, this water-based paint film can by string housing and external environment isolated, improve the water resistance of tableware.For the plant fiber tableware of dyeing, under the protection of water-based paint film, the pigment on string also not easily oozes out, and makes product not fugitive color thus.
The present invention also provides a kind of plant fiber tableware, and this tableware comprises: string housing and the water-based paint film being overlying on described string surface of shell;
Above-mentioned string housing comprises: weight ratio is (4 ~ 6): (0.5 ~ 2): (2 ~ 4): the bamboo fibre powder of 1, cornstarch, urea-formaldehyde resin powder and cavings.
This plant fiber tableware can be obtained by said method.
Above-mentioned plant fiber tableware includes but not limited to mess-tin, bowl and spoon.For mess-tin, as shown in Figure 1, this plant fibre snack box body comprises the profile of this mess-tin plant fiber tableware: string housing 1, and covers the water-based paint film 2 with described string housing 1 surface.
Plant fiber tableware provided by the invention has good water resistance, and not easily water penetration and deformation in use procedure, service life is longer.For the plant fiber tableware of dyeing, pigment not easily oozes out due to the barrier effect of water-based paint film, therefore this product not fugitive color.Simultaneously due to housing and the equal degradable of paint film of this product, therefore this product post processing is comparatively for convenience of environmental protection.
In order to understand the present invention further, be described plant fiber tableware provided by the invention and preparation method thereof below in conjunction with embodiment, protection scope of the present invention is not limited by the following examples.
The water paint that following examples use builds bi-component waterborne paint W3000-2K for fertile, and during construction, the proportioning (weight ratio) of resin Composition and curing agent component is 100: 8.
Embodiment 1
1, get 50kg bamboo fibre powder (50 ~ 60 order), 10kg cornstarch, 30kg urea-formaldehyde resin powder and 10kg cavings, pour heating and mould pressing in moulding press after being mixed by above-mentioned raw materials into shaping, heating-up temperature is set to 150, and pressure is set to 15MPa.After mold pressing completes, divided mould, takes out string housing.
2, the string housing using trimmer obtained to step 1 carries out corner finishing.
3, to the surface polarity grinding process of the string housing that step 2 obtains, then by clean for the cleaning of the dust of surface of shell.
4, in mixer, add the resin Composition of water paint, curing agent component and water, amount of water is 15% of water paint, then carries out stirring at low speed and high-speed stirred successively, and the speed of stirring at low speed is 175rpm, the speed of high-speed stirred is 550rpm, obtains water-based paint vehicle after having stirred.
5, the water-based paint vehicle that the string surface of shell even application step 4 obtained in step 3 configures.
6, semi-finished product step 5 obtained are sent in electric heating drying tunnel and are dried, and bake out temperature is set to 80 DEG C, obtains plant fiber tableware after having dried.
Embodiment 2
1, get 60kg bamboo fibre powder (40 ~ 50 order), 5kg cornstarch, 25kg urea-formaldehyde resin powder, 10kg cavings, pour heating and mould pressing in moulding press after being mixed by above-mentioned raw materials into shaping, heating-up temperature is set to 140 DEG C, and pressure is set to 10MPa.After mold pressing completes, divided mould, takes out string housing.
2, the string housing using trimmer obtained to step 1 carries out corner finishing.
3, to the surface polarity grinding process of the string housing that step 2 obtains, then by clean for the cleaning of the dust of surface of shell.
4, in mixer, add the resin Composition of water paint, curing agent component and water, amount of water is 12% of water paint, then carries out stirring at low speed and high-speed stirred successively, and the speed of stirring at low speed is 150rpm, the speed of high-speed stirred is 500rpm, obtains water-based paint vehicle after having stirred.
5, the water-based paint vehicle that the string surface of shell even application step 4 obtained in step 3 configures.
6, semi-finished product step 5 obtained are sent in electric heating drying tunnel and are dried, and bake out temperature is set to 70 DEG C, obtains plant fiber tableware after having dried.
Embodiment 3
1,40kg bamboo fibre powder (60 ~ 80 order), 10kg cornstarch, 40kg urea-formaldehyde resin powder, 10kg cavings and 5kg red color powder is got, heating and mould pressing in moulding press is poured into shaping after being mixed by above-mentioned raw materials, heating-up temperature is set to 160 DEG C, and pressure is set to 18MPa.After mold pressing completes, divided mould, takes out string housing.
2, the string housing using trimmer obtained to step 1 carries out corner finishing.
3, to the surface polarity grinding process of the string housing that step 2 obtains, then by clean for the cleaning of the dust of surface of shell.
4, in mixer, add the resin Composition of water paint, curing agent component and water, amount of water is 20% of water paint, then carries out stirring at low speed and high-speed stirred successively, and the speed of stirring at low speed is 180rpm, the speed of high-speed stirred is 600rpm, obtains water-based paint vehicle after having stirred.
5, the water-based paint vehicle that the string surface of shell even application step 4 obtained in step 3 configures.
6, semi-finished product step 5 obtained are sent in electric heating drying tunnel and are dried, and bake out temperature is set to 80 DEG C, obtains plant fiber tableware after having dried.
Plant fiber tableware prepared by embodiment 1 ~ 3 is placed in pond and soaks taking-up after 2 hours, all non-deliquescing distortion of above-mentioned three plant fiber tablewares.Plant fiber tableware prepared by embodiment 3 fades.
From the above results, the plant fiber tableware adopting the method that the invention provides to prepare has comparatively excellent water resistance, and service life is longer.For the coloured plant fiber tableware of band, product is fugitive color not.
The explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a preparation method for plant fiber tableware, is characterized in that, comprising:
A), by raw material mix rear hot-forming, obtain string housing; Described raw material comprises weight ratio for (4 ~ 6): (0.5 ~ 2): (2 ~ 4): the bamboo fibre powder of 1, cornstarch, urea-formaldehyde resin powder and cavings;
B), grinding process is carried out to the surface of described string housing;
C) the string surface of shell spraying, after polishing or dip-coating water-based paint vehicle post-drying, obtain plant fiber tableware; Described water-based paint vehicle is 100:(10 ~ 20 by weight ratio) bi-component waterborne paint and water form, described bi-component waterborne paint is made up of resin Composition and curing agent component;
Described water-based paint vehicle is prepared as follows:
Carry out stirring at low speed and high-speed stirred successively after described resin Composition, curing agent component and water being mixed, obtain water-based paint vehicle;
Described stirring at low speed speed is 150rpm ~ 200rpm; The speed of high-speed stirred is 500rpm ~ 600rpm.
2. the preparation method of plant fiber tableware according to claim 1, is characterized in that, the particle diameter of described bamboo fibre powder is 40 order ~ 80 orders.
3. the preparation method of plant fiber tableware according to claim 1, is characterized in that, described hot-forming temperature is 140 DEG C ~ 160 DEG C.
4. the preparation method of plant fiber tableware according to claim 1, is characterized in that, described hot-forming pressure is 10MPa ~ 20MPa.
5. preparation method according to claim 1, is characterized in that, the temperature of described oven dry is 70 DEG C ~ 80 DEG C.
6. preparation method according to claim 1, is characterized in that, described raw material also comprises color powder.
7. preparation method according to claim 1, is characterized in that, also comprises before step b: the step of string housing being carried out to corner finishing.
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| CN103170237B (en) * | 2013-01-05 | 2015-02-18 | 武汉碧艾投资管理有限公司 | Novel Air purifying method by fruit extraction enzyme |
| CN104002347B (en) * | 2013-02-25 | 2016-08-17 | 苏州天健竹业科技有限公司 | A kind of antistatic bamboo elevator components preparation technology |
| CN103627196B (en) * | 2013-12-02 | 2016-07-06 | 安徽易科环保科技有限公司 | Degradable plant fibre daily utensil and manufacture method thereof |
| CN105504850A (en) * | 2015-12-31 | 2016-04-20 | 浙江亨仕竹生态科技有限公司 | Preparation process of plant fiber tableware |
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| CN106009505A (en) * | 2016-07-26 | 2016-10-12 | 吴永鹏 | Manufacturing technique and product for high-end tea package box or tin of rock-tea Bantianyao tea |
| CN106565996A (en) * | 2016-10-21 | 2017-04-19 | 广西师范学院 | Disposable and degradable bowl and making method thereof |
| CN108504123A (en) * | 2018-04-16 | 2018-09-07 | 南京林业大学 | Bamboo pulp lunch box for environment protection and its production method |
| CN110623372B (en) * | 2019-10-11 | 2022-04-12 | 广东企立昌大科技有限公司 | Environment-friendly button and preparation method thereof |
| CN111702915A (en) * | 2020-06-24 | 2020-09-25 | 陈鸥 | Preparation method of fibrous degradable tableware |
| CN113402895A (en) * | 2021-05-20 | 2021-09-17 | 江苏百通达科技股份有限公司 | Degradable material for disposable tableware and preparation method thereof |
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