CN113502003A

CN113502003A - Pulp paste for hand molding and hand molding method

Info

Publication number: CN113502003A
Application number: CN202110676462.5A
Authority: CN
Inventors: 王雁; 张月; 张珂
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2021-06-18
Filing date: 2021-06-18
Publication date: 2021-10-15

Abstract

The present invention relates to a kind of pulp slurry for manual molding, which is made of the following components according to weight percentage: 40%-45% pulp, 18%-24% corn starch, 20%-24% hand-made pulp, 12% to 16% of cooked gypsum powder and 2.2% to 3.2% of edible oil. After adding cooked gypsum powder, the hardness and plasticity of the pulp slurry are improved, and it is not easy to be broken even if there is a collision; after adding an appropriate amount of edible oil, on the one hand, the pulp slurry can be prevented from sticking to hands, and on the other hand, the pulp slurry can be used as a hand-molded material. , has the advantage of easy demoulding.

Description

Pulp paste for hand molding and hand molding method

Technical Field

The invention relates to the technical field of manual molding, in particular to pulp mud for manual molding and a manual molding method.

Background

The pulp molding mainly uses hand-made pulp mud as a raw material, and the hand-made pulp mud is put into a mold for manual film pressing to obtain a finished product of the pulp mud.

The existing hand-made paper pulp mud components usually comprise foam powder, water, paper pulp, paste, colloid, fiber (and feldspar) and the like, and are mostly used for kneading materials of people. It has the following technical problems:

the pulp mud is too soft, and a finished product of the pulp mud after molding is not firm enough and has larger difference with the shape of a mold; the paper pulp mud sticks to hands, is not easy to demould after film pressing, often causes the problem that the paper pulp mud sticks to the wall of the mould, influences the effect of a finished product, and can not meet the moulding requirement of a manual mould.

Disclosure of Invention

Aiming at the technical problems in the prior art, one of the purposes of the invention is as follows: the pulp mud for manual molding has higher hardness, and the product molded by the pulp mud has the advantages of full molding effect, firm appearance, higher shape reduction degree, lower viscosity, easy demolding and capability of meeting the molding requirement of a manual mold.

Aiming at the technical problems in the prior art, the second purpose of the invention is as follows: provides a manual molding method, improves the hardness of the product, and has full molding effect and high shape reduction degree.

In order to achieve the purpose, the invention adopts the following technical scheme:

the pulp mud for hand molding is prepared with pulp 40-45 wt%, corn starch 18-24 wt%, hand paste 20-24 wt%, cooked gypsum powder 12-16 wt% and edible oil 2.2-3.2 wt%.

Preferably, the food is prepared from 41.2% of paper pulp, 21% of corn starch, 21% of handmade paste, 14% of cooked gypsum powder and 2.8% of edible oil in percentage by weight.

A hand molding process comprising the steps of:

s1, mixing the paper pulp, the corn starch, the handmade paste and the cooked gypsum powder and then fully stirring;

s2, adding edible oil and continuing stirring when the pulp mud is primarily formed;

s3, taking a proper amount of paper pulp mud, kneading the paper pulp mud into a dough, coating edible oil on the surface of the dough, and putting the dough into a mould to be pressed and molded manually;

s4, opening the mould, taking out the paper pulp mud moulded finished product, naturally drying the paper pulp mud moulded finished product, uniformly coating a proper amount of water-based paint on the surface of the finished product, and standing for 5-10 minutes.

Further, the preparation of the paper pulp comprises the steps of respectively putting shredded paper and water into a stirrer, wherein the water at least submerges the shredded paper in the stirrer; starting the stirrer to stir, pouring formed paper pulp into the screen pot after stirring, and then pressing the paper pulp by hand to dewater, so that water in the paper pulp flows out of the screen pot and is drained away.

Further, the dewatering amount discharged from the wire leaking basin is 80-85% of the water content of the paper pulp.

Preferably, in S4, the paper pulp mud molded product is air-dried naturally for more than 48 hours at 20-30 ℃ and normal temperature.

In summary, the present invention has the following advantages:

the paper pulp mud has the advantages of strong flexibility, good plasticity, no hand sticking and the like. The corn starch and the paste with the contents increase the viscosity of the paper pulp mud, the hardness and the plasticity of the paper pulp mud are improved after the delicatessen gypsum powder is added, and the paper pulp mud is not easy to break even if collision occurs; after a proper amount of edible oil is added, on one hand, the hand-free plastic has the advantage of easy demoulding when being used as a hand molding material. And finally, the finished molded paper pulp mud product is naturally air-dried and then coated with water-based paint, so that the waterproof and moistureproof effects are achieved, and the stability of the finished paper pulp mud molded product is enhanced.

The materials can be obtained in daily life, are non-toxic and harmless, have extremely low harm, are very suitable for being applied to the manual originality of children, and children can mold novel works by combining the paper pulp mud with the paper pulp mold, so that the practical ability and the three-dimensional space imagination of the children are exercised, and the cognition of the children on the paper pulp materials is also improved.

Drawings

Fig. 1 and 2 show a molded product of the pulp slurry without addition of the deli gypsum powder.

Fig. 3 and 4 show the molded product of the pulp slurry with the addition of the boiled gypsum powder.

Fig. 5 and 6 show the molded product of the paper pulp paste without the edible oil.

Fig. 7 and 8 show the molded product of the pulp paste with edible oil.

Detailed Description

The present invention will be described in further detail below.

Example 1

A pulp paste for manual molding is prepared from (by weight) 44% pulp, 18% corn starch, 21.4% handmade paste, 14% cooked gypsum powder and 2.6% edible oil.

The preparation method comprises the following steps:

(1) pulp manufacturing: shredding waste paper (including printing paper, newspaper, handsheet, rice paper, etc.) in a container, and pouring water into the container, wherein the water is used for at least covering the shredded paper in the container; pouring all the materials in the container into the stirrer, and pouring the materials into the perforated basin after stirring; and finally, pressing the paper pulp by hand to enable water in the paper pulp to flow out of the leaking net basin, wherein the approximate dehydration amount is 80-85%.

(2) Mixing and stirring materials: mixing paper pulp, corn starch and manual paste in proportion and then fully stirring, so that paper fiber, starch and paste can be more compact, and a fiber web can be firmer; adding the cooked gypsum powder, and stirring to enhance the plasticity of the paper pulp mud; adding edible oil when the paper pulp mud is primarily formed, and then stirring.

(3) Manual molding: coating a small amount of edible oil on the surface of the paper pulp mud, then putting the paper pulp mud into a mold, manually pressing the film, opening the mold, and taking out the paper pulp mud finished product.

(4) And (3) finished product: and naturally drying the paper pulp mud finished product, uniformly coating a proper amount of water-based paint on the surface of the finished product, and standing for about 5 minutes.

Manually molding the paper pulp mud material to obtain a block with the diameter of about 3cm, drying the block for 48 hours at the normal temperature of 20-30 ℃ by natural air, smearing water-based paint on the surface, and standing for about 5 minutes. The final molded product has a little gap, the material is compact and light, and the material is not easy to break and damp.

Example 2

A pulp paste for manual molding is prepared from 41% of pulp, 20.6% of corn starch, 21.2% of handmade paste, 14% of cooked gypsum powder and 3.2% of edible oil in percentage by weight.

The preparation method is the same as that of example 1.

Manually molding the paper pulp mud material to obtain a block with the diameter of about 3cm, drying the block for 48 hours at the normal temperature of 20-30 ℃ by natural air, smearing water-based paint on the surface, and standing for about 5 minutes. The final molded product has very smooth appearance, high demolding speed, fine surface, light weight, less cracking and less damp.

Example 3

A pulp paste for manual molding is prepared from 41% of pulp, 18.8% of corn starch, 22% of handmade paste, 16% of cooked gypsum powder and 2.2% of edible oil in percentage by weight.

The preparation method is the same as that of example 1.

Manually molding the paper pulp mud material to obtain a block with the diameter of about 3cm, drying the block for 48 hours at the normal temperature of 20-30 ℃ by natural air, smearing water-based paint on the surface, and standing for about 5 minutes. The final molded product has the advantages of plump appearance, high molding reduction degree, small gap, strong toughness, clear surface texture, light weight, difficult cracking and difficult damping.

As shown in fig. 1 and 2, the pulp mud finished product without the addition of the cooked gypsum powder: the molded product is obviously softer and more collapsed, and the molding effect is poorer.

As shown in fig. 3 and 4, the pulp paste product after adding the cooked gypsum powder: the shaping effect is full, the appearance is firm, and the shape reduction degree is higher.

As shown in fig. 5 and 6, the pulp paste finished product without edible oil is: the surface of the molded product is obviously uneven and has a plurality of defects.

As shown in fig. 7 and 8, the pulp paste product after the edible oil is added: the shaping effect is full, the shape reduction degree is high, and the surface is smooth and fine.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.

Claims

1. A pulp mud for hand molding, characterized in that: by weight percentage, it is made of the following components, 40%-45% pulp, 18%-24% cornstarch, 20%-24% handmade Paste, 12%-16% cooked gypsum powder and 2.2%-3.2% edible oil.

2. A kind of pulp slurry for hand molding according to claim 1, characterized in that: according to weight percentage, it is made from the following components: 41.2% pulp, 21% cornstarch, 21% handmade pulp , 14% cooked gypsum powder and 2.8% edible oil.

3. a hand molding method, is characterized in that: comprise the following steps:

S1, mix pulp, cornstarch, handmade paste, and deli gypsum powder and stir well;

S2, when the pulp slurry is initially formed, add edible oil and continue to stir;

S3, take an appropriate amount of pulp and knead it into a ball, smear the surface with edible oil, put it into a mold and press it manually;

S4, open the mold, take out the pulp mud molded product, air dry the pulp mud molded product naturally, and then take an appropriate amount of water-based paint and evenly apply it on the surface of the finished product, and let it stand for 5-10 minutes to complete.

4. A kind of manual molding method according to claim 3, is characterized in that: the preparation of pulp comprises the following steps, put shredded paper and water into the mixer respectively, and the water at least submerges the shredded paper in the mixer; start the mixer to carry out Stir, after the stirring is completed, pour the formed pulp into the slip screen basin, and then press the pulp by hand to dehydrate, so that the water in the pulp flows out of the slip screen basin and drains away.

5. A manual molding method according to claim 4, wherein the dewatering amount drained from the slippery net basin is 80%-85% of the water content of the pulp.

6. according to a kind of manual molding method of claim 3, it is characterized in that: in S4, the mode of natural air-drying of pulp mud molded product is, at 20～30 ℃ of normal temperatures, air-dry in air more than 48 hours naturally .