CN1031210C - Material and process for making container from pulp - Google Patents
Material and process for making container from pulp Download PDFInfo
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- CN1031210C CN1031210C CN 94106258 CN94106258A CN1031210C CN 1031210 C CN1031210 C CN 1031210C CN 94106258 CN94106258 CN 94106258 CN 94106258 A CN94106258 A CN 94106258A CN 1031210 C CN1031210 C CN 1031210C
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Abstract
The present invention belongs to a material and a process for making containers from pulp, which takes plant fibers as a backing material. The material comprises surfactant, and the content of the surfactant is 0.01% to 2% of the weight of absolute dry pulp. The preparation process provided by the present invention is characterized in that beating degree in extrusion is controlled between 28 and 32 degrees SR, and adhesive, the surfactant and a heat-resisting agent are orderly added during furnishing. The pH value of the pulp when the surfactant is added is controlled between 4 and 5.5, and the pH value of the pulp when the heat-resisting agent is added is controlled between 9 and 10. Pulp molding containers prepared by the material of the present invention have the advantages of water resistance, oil resistance, no toxicity, no abnormal flavor and regenerable use.
Description
The present invention relates to the manufacture method of pulp composition and it, more particularly it belong to a kind of with the string be base material can be used for preparing the material and the manufacture craft thereof of starching mold container.
Present disposable mold container has been widely used in packaging for foodstuff, as fast food lunch-box, disposable bowl, dish etc., and along with the production-scale increasing of food industrialization, and the quickening of people's rhythm of life, the consumption of mold container is increasing.It is base material that existing commercially available disposable mold container adopts basically with plastics, because plastics itself have certain peculiar smell and toxicity, therefore not only taste is not good enough with this mold container packaged food, and diminishes health.In addition, this mold container is difficult for degraded, and used waste product can't regeneration, then can cause serious environmental to pollute in the course of time.For addressing this problem, it is base material that people attempt with the string, prepare disposable container from pulp, but fail to solve its liquid permeability (as infiltration, oil impregnate) Chinese patent CN1061006A all the time and announced a kind of material of doing tableware, packaging for foodstuff, selecting the plant straw exactly for use is raw material, adding suitable bonding system, additive makes, when its sepage problem of solution, then adopt the watertight composition that is coated with useful rubber, polypropylene preparation at this material internal layer, therefore in fact still fail thoroughly to solve the existing problem of plastic container.
Purpose of the present invention just provide a kind of be base material with the string, have water-fast, oil resistance, and nontoxic free from extraneous odour, the easily material and the manufacture craft thereof of degraded.This material is used to prepare the weak point that container from pulp can thoroughly overcome the plastic container.
The object of the present invention is achieved like this:
Selecting string for use is raw material, adds adhesive, surfactant, and its content should account for the 0.01-2% of absolute dry pulp weight.The material that contains surfactant after the drying, can form uniform anti-liquid film layer.
Adhesive can be selected the stickum of nontoxic free from extraneous odour routinely for use, as starch, dextrin, solution such as Carboxymethyl Cellulose or polyvinyl alcohol, adhesive can make whole system be woven into a mesh structure, and plant cellulose lumped together, make it have certain toughness and intensity, the percentage by weight that adhesive that the present invention is selected and consumption thereof account for absolute dry pulp is: cationic starch (0.5-5%) or oxidized starch (0.5-6%), biphosphonate starch (1-5%), gum rosin emulsion (1-8%), Carboxymethyl Cellulose (0.8-4%), polyvinyl alcohol (0.4-2.5%) wherein any one.
Innovative point of the present invention also is through proportioning repeatedly, experiment, detection and optimizes the prescription consumption of surfactant.
The surfactant that the present invention adopts is a chemical assistant nontoxic, free from extraneous odour, to reduce the surface tension of container from pulp material, and the bigger water of surface tension, oil are produced bigger contact angle, play anti-liquid effect, the consumption of surfactant should be controlled at the 0.01-2% of absolute dry pulp weight, and through evidence, addition is crossed the low anti-liquid effect that then do not reach, the too high material surface that then makes is clamminess, and is unfavorable for making the demoulding of slurry mold container.
Experiment shows, surfactant preferably adopts O/W type emulsion bases, and this matrix not only has significant surface-activity effect, and be easy to be uniformly dispersed, easily dry, help improving the quality of slurry mold container, the oil phase in the O/W type emulsion bases: the proportioning of water preferably:
Oil phase: water=1: 30-100 (weight ratio), saponification agent, emulsifying agent, protective agent optimum amount are: saponification agent is the 0.1-8% of oil phase gross weight, and emulsifying agent is the heavy 0.04-9% of oil phase meaning, and protective agent is the 0.1-4% of oil phase gross weight.
In the preparation; preferably be prepared into colostrum earlier; promptly earlier in oil phase: the ratio water intaking of water=1: 0.5-1, with water and saponification agent mixing, after the heating; add finish, emulsifying agent, protective agent more successively; wait to endure to transparent, in the time of in 60-70 ℃ of hot water, can diffusing into white emulsion rapidly, add water to full dose again; Pei Zhi O/W emulsion bases good stability is difficult for layering in this way.
The concrete oil phase that adopts of the present invention is the mixture of rosin and paraffin 1: 0.8-1.2; saponification agent is monovalence soap such as caustic soda, soda ash, potassium hydroxide etc.; emulsifying agent is selected ammonium stearate or stearic acid for use, protective agent can select for use the outstanding agent of polymeric retention aid such as carboxymethyl cellulose, casein or gelatin wherein any one.These components selection not only can form stable emulsion bases, and nontoxic, free from extraneous odour, cheap.The selection of each amounts of components has guaranteed the stability of O/W emulsion bases, and with the Yi Rongxing of string.
Surfactant more specifically compound method is as follows:
Rosin, mineral wax mixture: the proportion ingredient of water=1: 0.5-1; with water and monovalence soap mixing; be heated to 80-90 ℃; add rosin and mineral wax mixture again; after it is disperseed fully; be warming up to 100-110 ℃; the percentage of pressing the mixture weight of rosin and paraffin then adds emulsifying agent stearic acid 0.04-9%; protective agent carboxymethyl cellulose 0.1-4%; enduring to provoke sizing material with wooden stick becomes transparence to fall; diffuse into white emulsion rapidly in 70 ℃ of hot water after, press oil phase: the proportioning of water=1: 30-100 adds full dose water.Below be effective formulation Example (by weight) of surfactant of the present invention: embodiment 1234 oil phases 100 100 100 100 waters 3,000 6,000 8,000 10000 saponification agents 8 0.2 4 0.1 emulsifying agents 0.04 0.18 0.9 9 protective agents 0.2 4 0.1 0.15
The prepared surfactant of above embodiment all can form good anti-liquid film layer after the drying in the container from pulp material.
Innovative point of the present invention is that also also heat-resistant agent has been selected in proportioning, experiment for use repeatedly in the component of container from pulp material.
Because the general fusing point of oil phase in the surfactant is all lower, after the oven dry film forming, anti-liquid film can be put into because of the food of higher temperature physicochemical change takes place, anti-liquid film is destroyed, and the sepage phenomenon appears, therefore, be added with heat-resistant agent in the present invention's design, to improve the stability of anti-liquid film, increase the heat resistance of the prepared container from pulp of the present invention.
The present invention selects polyvinylidene chloride latex or Methyl Hydrogen Polysiloxane Fluid, poly dimethyl the eleventh of the twelve Earthly Branches alkene through testing sieve repeatedly, wherein any one makes heat-resistant agent, its consumption is respectively (percentage that accounts for absolute dry pulp weight) 0.1-5%, 0.01-0.08%, 0.1-2.5%, experiment shows that its consumption is low excessively, does not have the heat resistance that strengthens container from pulp, and the too high then material of consumption embrittlement, container from pulp are damaged easily.
Innovative point of the present invention is that also designed manufacture craft can guarantee the liquid-repellency that container from pulp is good, and cuts down the consumption of energy, and reduces cost.
Preparation technology's flow process of material of the present invention is:
Market pulp board---discongests that---making beating-furnishing (adding adhesive, surfactant, heat-resistant agent)---vacuum dehydration---is hot-forming.
Preparation technology's of the present invention key point is:
A, slurry should fully discongest, suitably fibrillating, avoid cut-outs, beating degree and be controlled at 28-32SR good drainability and in producing with the intensity that guarantees container, the minimizing energy consumption reduces cost.
Should note the interpolation order of adhesive, surfactant, heat-resistant agent during the slurry furnishing, in preparation process, earlier adhesive is slowly added in the slurry of accomplishing fluently, stir, pH value is controlled between 4-5.5, slowly adds surfactant, stir, control slurry pH value is 9-10 the time, add heat-resistant agent, prevent the direct effect of surfactant and heat-resistant agent different ions electric charge, to guarantee its effective anti-liquid, heat-resisting function.
Below be the effectively embodiment (by weight) of prescription of material of the present invention:
Be used for the container from pulp material according to above embodiment preparation, be prepared into the disposable fast food lunch box, disposable bowl, all has good anti-liquid behind the dish, heat resistance, through testing the surface, oil, water or oil-water mixture be heated in 100 ° ± 5 ° container from pulp that inject the present invention's preparation 4 hours indeformable, impermeable, normal temperature is oil down, water and mixed liquor thereof inject in back 48 hours indeformable, impermeable, the present invention easily degrades, waste product is through exposing to wind and rain, Exposure to Sunlight can slowly be dissolved in the soil in 60 hours, the present invention is a string and nontoxic because of component, the chemical assistant of free from extraneous odour, so do not influence health, and in whole process of production, do not produce pollution sources, so have good economic benefit and social benefit.
Claims (8)
1, a kind of material for preparing container from pulp comprises plant cellulose, adhesive, it is characterized in that also containing in this material surfactant, and its content is the 0.01-2% of absolute dry pulp weight.
2, the material of preparation container from pulp according to claim 1 is characterized in that said surfactant is an O/W type emulsion bases.
3, the material of preparation slurry mold container according to claim 2; the oil phase, water, saponification agent, emulsifying agent, the protectant proportioning (weight ratio) that it is characterized in that said O/W type emulsion bases: oil phase: water=1: 30-100; saponification agent, emulsifying agent; protective agent accounts for the 0.1-8% of oil phase gross weight respectively; 0.04-9%, 0.1-4%.
4, the material of preparation slurry mold container according to claim 3 is characterized in that said oil phase is the mixture of rosin and paraffin, and its weight ratio is 1: 0.8-1.2,
Saponification agent is the monovalence soap;
Emulsifying agent is ammonium stearate or stearic acid;
Protective agent be carboxymethyl cellulose, casein or gelatin wherein any one.
5, the material of preparation slurry mold container according to claim 1 and 2 is characterized in that also containing in this material heat-resistant agent.
6, the material of preparation slurry mold container according to claim 5, it is characterized in that said heat-resistant agent be polyvinylidene chloride latex, Methyl Hydrogen Polysiloxane Fluid, poly dimethyl the eleventh of the twelve Earthly Branches alkene wherein any one, its content accounts for the 0.1-5% of absolute dry pulp weight, 0.01-0.08%, 0.1-2.5% respectively.
7, the preparation technology of preparation container from pulp material according to claim 1, comprise discongest, making beating, furnishing, vacuum dehydration, hot-forming, it is characterized in that: the beating degree when discongesting is controlled at 28-32 ° of SR, adhesive, surfactant, heat-resistant agent should add successively during furnishing, when adding surfactant, the pH value of slurry should be controlled between the 4-5.5, and the pH value of slurry should be controlled at 9-10 when adding heat-resistant agent.
8, the preparation technology of preparation container from pulp material according to claim 7 is characterized in that the compound method of said surfactant is:
A, batching: select O/W type emulsion bases for use, wherein oil phase, water, saponification agent, emulsifying agent, protectant proportioning (weight ratio) are oil phase: water=1: 30～100, saponification agent, emulsifying agent, protective agent account for 0.1～8%, 0.04～9%, 0.1～4% of oil phase gross weight respectively;
B, preparation colostrum, by oil phase: the ratio of water=1: 0.5-1 is fetched water, and with water and saponification agent mixing, after the heating, adds oil phase, emulsifying agent, protective agent successively, makes and endures to transparent, in 60-70 ℃ of hot water, can diffuse into white emulsion rapidly till;
C, press oil phase: water=1: 30-100 adds remaining water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106258 CN1031210C (en) | 1994-06-03 | 1994-06-03 | Material and process for making container from pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94106258 CN1031210C (en) | 1994-06-03 | 1994-06-03 | Material and process for making container from pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1097480A CN1097480A (en) | 1995-01-18 |
| CN1031210C true CN1031210C (en) | 1996-03-06 |
Family
ID=5032452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94106258 Expired - Fee Related CN1031210C (en) | 1994-06-03 | 1994-06-03 | Material and process for making container from pulp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1031210C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1079464C (en) * | 1997-09-04 | 2002-02-20 | 刘持荣 | Powder moulding process for paper products |
| CN104311906B (en) * | 2014-11-12 | 2017-11-10 | 海南天然橡胶产业集团股份有限公司 | A kind of preparation method of tire belt white carbon/NR masterbatch |
| CN111996830A (en) * | 2020-09-04 | 2020-11-27 | 江苏好健康新材料有限公司 | Production process of fiber composite material household paper |
-
1994
- 1994-06-03 CN CN 94106258 patent/CN1031210C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1097480A (en) | 1995-01-18 |
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