CN105908578A - Production method of paper pulp molded product - Google Patents
Production method of paper pulp molded product Download PDFInfo
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- CN105908578A CN105908578A CN201610288258.5A CN201610288258A CN105908578A CN 105908578 A CN105908578 A CN 105908578A CN 201610288258 A CN201610288258 A CN 201610288258A CN 105908578 A CN105908578 A CN 105908578A
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- mould
- paper pulp
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
- D21J5/00—Manufacture of hollow articles by transferring sheets, produced from fibres suspensions or papier-mâché by suction on wire-net moulds, to couch-moulds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
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- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Paper (AREA)
Abstract
The invention provides a production method of a paper pulp molded product with the smooth surface. The production method includes the following steps that 1, after paper pulp fibers, water and a polyacrylamide resin solution are mixed and stirred, pulp is obtained; 2, under the negative pressure condition, the pulp is sucked and dewatered, and a paper pulp molded wet blank with the water content being 60%-70% is obtained; 3, the paper pulp molded wet blank with the water content being 60%-70% is subjected to heat setting, and a paper pulp molded dry blank with the water content of 6%-10% is obtained. The production method has the advantages that the pulp is sucked and dewatered under the negative pressure condition, polyacrylamide reticular molecular structures in the pulp are centralized on the surface of the wet blank, a smooth film is formed on the surface of the pulp molded product after heat setting, and moisture absorption and powder falling are not likely to happen.
Description
Technical field
The present invention relates to field of packaging material, the production method of a kind of moulded paper pulp product.
Background technology
Moulded paper pulp product is with Plant fiber as primary raw material, adds auxiliary agent, uses the methods such as mold pressing to carry out
Molding, then dehydrate is finished product, production process environmental protection, uses process safety nonhazardous, uses
After be easily recycled, belong to classical green packaging products, used widely by both at home and abroad in recent years.
The patent of invention of Application No. 201410299892.X discloses a kind of method for paper pulp molding production, including
Step: 1) by raw material pulverizing, desanding, milled processed, prepare paper pulp fiber；2) by binding agent, auxiliary agent and
Water makes thickener according to weight ratio 10～15: 1: 10～15 is mixing；3) by paper pulp fiber and the paste of above-mentioned preparation
Material adds batch mixer and carries out batch mixing；4) above-mentioned batch mixing is carried out blank and obtain batch mixing granule；5) by above-mentioned batch mixing
It is injected into mould after granule adds foaming agent；6) molding；7) cooling and demolding.But, above-mentioned paper mould system
, the most easily there is dry linting phenomenon, thus limit at height by hygroscopic point in product rough surface
The use in the fields such as end electronic product.
Summary of the invention
The technical problem to be solved is: provide the production of a kind of ganoid moulded paper pulp product
Method.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is: a kind of moulded paper pulp product
Production method, comprises the steps:
Step 1, paper pulp fiber, water and polyacrylamide resin solution are mixed and stirred for after, obtain slurry；
Step 2, under condition of negative pressure, slurry carried out midge and be dehydrated, obtaining the paper of moisture content 60%～70%
Slurry molds wet base；
Step 3, the wet base of paper mould of moisture content 60%～70% is carried out thermal finalization, obtain moisture content 6～10%
Paper mould dry body.
The beneficial effects of the present invention is: under condition of negative pressure, slurry is carried out midge, dehydration so that in slurry
Polyacrylamide network molecular structure concentrate on wet base surface, in moulded paper pulp product surface shape after thermal finalization
Become one layer of smooth film, be difficult to moisture absorption and dry linting.
Detailed description of the invention
By describing the technology contents of the present invention in detail, being realized purpose and effect, give below in conjunction with embodiment
With explanation.
The design of most critical of the present invention is: under condition of negative pressure, slurry is carried out midge, dehydration so that slurry
In polyacrylamide network molecular structure concentrate on wet base surface, on moulded paper pulp product surface after thermal finalization
Define one layer of smooth film.
The present invention provides the production method of a kind of moulded paper pulp product, comprises the steps:
Step 1, paper pulp fiber, water and polyacrylamide resin solution are mixed and stirred for after, obtain slurry；
Step 2, under condition of negative pressure, slurry carried out midge and be dehydrated, obtaining the paper of moisture content 60%～70%
Slurry molds wet base；
Step 3, the wet base of paper mould of moisture content 60%～70% is carried out thermal finalization, obtain moisture content 6～10%
Paper mould dry body.
Knowable to foregoing description, the beneficial effects of the present invention is: under condition of negative pressure, slurry is carried out midge,
Dehydration so that the polyacrylamide network molecular structure in slurry concentrates on wet base surface, at paper after thermal finalization
Slurry molded article surface defines one layer of smooth film, is difficult to moisture absorption and dry linting.
Further, step 4 is also included: carry out cutting and hole by the paper mould dry body of moisture content 6～8%
After processing, obtain paper mould finished product.
Further, in step 1, the feeding quantity of described polyacrylamide resin solution is paper pulp fiber and water
Gross weight 4～10 ‰, the Solute mass fraction of described polyacrylamide resin solution is 2～8%.
Further, in step 1, described slurry has been additionally added binding agent and auxiliary agent, described polyacrylamide
The feeding quantity of resin solution is the 4～10 ‰ of the gross weight of paper pulp fiber, binding agent, auxiliary agent and water, described poly-
The Solute mass fraction of acrylamide resin solution is 2～8%.
Further, step 2 is particularly as follows: immerse slurry liquid level 15mm by the mould with drainage screen
Hereinafter, continue within 2～5 seconds, to carry out midge for negative pressure-0.06MPa, after molding thickness to be achieved, mould is moved
Go out slurry liquid face, continue to be dehydrated 10～30 seconds under-0.06MPa negative pressure-pumping effect, prepare moisture content 60～70%
The wet base of paper mould.
Seen from the above description, along with negative pressure-pumping, polyacrylamide amine molecule is more concentrates on wet base face,
Utilize polyacrylamide amine molecule netted (80～100 mesh) structure can with paper pulp fiber molecule weave in,
Fibres bond can be effectively improved firm, improve wet base intensity and toughness.
Further, step 3 specifically includes: thermal finalization mould is warmed up to 160～180 DEG C, then by aqueous
Rate 60～70% the wet base of paper mould be transferred in thermal finalization mould, after no pressure matched moulds continues 2～8 seconds, increase
Add clamping pressure 100N/cm2Continue 30～40 seconds, prepare moisture content 6～the paper mould dry body of 10%.
Seen from the above description, polyacrylamide and the intertexture molecule of paper pulp fiber are through high temperature dehydration and mold pressing
Rear more densely cross-linked smooth, i.e. define a tunic at dry body face.
Further, when carrying out thermal finalization, before the heating of thermal finalization mould, spray polytetrafluoroethylsolution solution.
Seen from the above description, a tunic can be formed at die surface after polytetrafluoroethylsolution solution condenses, use
To separate wet base and hot pressing die, effectively protect polyacrylamide consume when through hot press moulding in wet base
And the residual on mould.
Further, described paper pulp fiber is obtained after crushing, filtering by Plant fiber, described Plant fiber
Selected from wood, bamboo, reed, cotton, fiber crops, careless one or more.
Further, described auxiliary agent selected from aluminium oxide, plants starch, polyethylene one or more.
Seen from the above description, select above-mentioned auxiliary agent, be greatly improved the structural strength of moulded paper pulp product.
Concrete, the production method of the moulded paper pulp product that the present invention provides is as follows:
Step 1, sorted for vegetable material pulverizing, screening and filtering etc. are processed prepare paper pulp fiber, add bonding
Agent, auxiliary agent and water dilution are made weight concentration and are mixed in batch mixer than the slurry being 1% pasty state, are simultaneously introduced
The levels 2 of slurry weight 4～10 ‰～polyacrylamide (PAM) resin solution of 8% fully stir
The material pond of paper pulp model formation machine is fed after mixing mixing；
Wherein, binding agent can be alkyl ketene dimer；Weight concentration refers to 1 than the slurry being 1% pasty state
The pasty state that the water of part paper pulp fiber of weight, binding agent and the mixture of auxiliary agent and 100 parts of weight is mixed into
Slurry.
Step 2, the mould with drainage screen is immersed 15mm under material pond liquid level, for negative pressure-0.06MPa
Continue within 2～5 seconds, to carry out midge, after molding thickness to be achieved, mould is removed stock tank liquid level, continue
Under-0.06MPa negative pressure-pumping effect, base wet to paper mould is dehydrated 10～30 seconds, prepares moisture content
60～the wet base of paper mould of 70%, concentrate on wet base face along with negative pressure-pumping polyacrylamide amine molecule is more,
Utilize polyacrylamide amine molecule netted (80～100 mesh) structure can with paper pulp fiber molecule weave in,
Fibres bond can be effectively improved firm, improve wet base intensity and toughness；
Step 3, the thermal finalization upper and lower mould completing pretreatment is all warmed up to 160～180 DEG C, then wet base is turned
Move in thermal finalization mould, after no pressure matched moulds continues 2～8 seconds, increase clamping pressure 100N/cm2Continue
30～40 seconds, preparing moisture content 6～the paper mould dry body of 10%, polyacrylamide divides with the intertexture of paper pulp fiber
Son, more densely cross-linked smooth after high temperature dehydration and mold pressing, i.e. defines a tunic at dry body face；Above-mentioned
Pretreatment refers to, the thermal finalization mould surface processed is sprayed politef (Te Folong) solution, waits to coagulate
A tunic can be formed at die surface after knot, in order to separate wet base and hot pressing die, effectively protect in wet base
Polyacrylamide consume when through hot press moulding and the residual on mould.
Step 4, dry body is transferred in cutting mould, surrounding overlap and hole is carried out polish, then makes
Obtain paper mould finished product.
Embodiment 1
Step 1, the Plant fiber chosen by grinding screen are diluted to pulp solution, add pulp solution quality 5 ‰
The water-borne acrylic resin solution of levels 2%, be blended in blender the speed with 1000 revs/min
Stirring；
Step 2, stirring is sufficiently mixed after slurry be fed to the material pond of paper pulp model formation machine, immerse molding
Mould was to midge under slurry liquid level 5 seconds, and removal mould continues negative pressure and is dehydrated 20 seconds, forms paper pulp
Molding l Water Paper base；
Step 3, the upper and lower die face of thermal finalization mould machined all is sprayed politef (Te Folong) solution,
Above-mentioned solution is the brilliant poly-Te Folong of board of silver that market is bought, and is all heated to thermal finalization upper and lower mould after shape film forming layer
After 160 DEG C, l Water Paper base is transferred in thermal finalization mould, clamping pressure 100N/cm2Continue 30 seconds, prepare and contain
Paper mould finished product is i.e. prepared after the paper mould dry body of water rate 8%, more cut cross cutting deburring.
After testing, the paper mould finished product coefficient of kinetic friction that above-mentioned steps prepares is 0.196, and falling bits amount is
3.92g/m2, and the blank sample coefficient of kinetic friction is 0.52, falling bits amount is 28.15g/m2, compare, this enforcement
Example paper mould finished product coefficient of friction reduces 62.3%, falls bits amount and decreases 86.07%, dry body product surface
Smooth.
Embodiment 2
Step 1, the Plant fiber chosen by grinding screen are diluted to pulp solution, add pulp solution quality 8 ‰
The water-borne acrylic resin solution of levels 4%, be blended in blender the speed with 1400 revs/min
Stirring；
Step 2, stirring is sufficiently mixed after slurry be fed to the material pond of paper pulp model formation machine, immerse molding
Mould was to midge under slurry liquid level 5 seconds, and removal mould continues negative pressure and is dehydrated 20 seconds, forms paper pulp
Molding l Water Paper base；
Step 3, the upper and lower die face of thermal finalization mould machined all is sprayed politef (Te Folong) solution,
Above-mentioned solution is the brilliant poly-Te Folong of board of silver that market is bought, and is all heated to thermal finalization upper and lower mould after shape film forming layer
After 170 DEG C, l Water Paper base is transferred in thermal finalization mould, clamping pressure 100N/cm2Continue 30 seconds, prepare and contain
Paper mould finished product is i.e. prepared after the paper mould dry body of water rate 8%, more cut cross cutting deburring.
After testing, the paper mould finished product coefficient of kinetic friction that above-mentioned steps prepares is 0.21, and falling bits amount is
3.12g/m2, and blank sample dynamic friction plastic uptake is 0.52, falling bits amount is 28.15g/m2, compare, this enforcement
Example paper mould finished product coefficient of friction reduces 59.6%, falls bits amount and decreases 88.9%, dry body product surface light
Sliding smooth.
Embodiment 3
Step 1, the Plant fiber chosen by grinding screen are diluted to pulp solution, add pulp solution quality 10 ‰
The water-borne acrylic resin solution of levels 6%, be blended in blender the speed with 1800 revs/min
Stirring；
Step 2, stirring is sufficiently mixed after slurry be fed to the material pond of paper pulp model formation machine, immerse molding
Mould was to midge under slurry liquid level 5 seconds, and removal mould continues negative pressure and is dehydrated 20 seconds, forms paper pulp
Molding l Water Paper base；
Step 3, the upper and lower die face of thermal finalization mould machined all is sprayed politef (Te Folong) solution,
Above-mentioned solution is the brilliant poly-Te Folong of board of silver that market is bought, and is all heated to thermal finalization upper and lower mould after shape film forming layer
After 180 DEG C, l Water Paper base is transferred in thermal finalization mould, clamping pressure 100N/cm2Continue 30 seconds, prepare and contain
Paper mould finished product is i.e. prepared after the paper mould dry body of water rate 8%, more cut cross cutting deburring.
After testing, the paper mould finished product coefficient of kinetic friction that above-mentioned steps prepares is 0.24, and falling bits amount is
2.92g/m2, and blank sample dynamic friction plastic uptake is 0.52, falling bits amount is 28.15g/m2, compare, this enforcement
Example paper mould finished product coefficient of friction reduces 53.8%, falls bits amount and decreases 89.6%, dry body product surface light
Sliding smooth.
In sum, the having the beneficial effects that of production method of the moulded paper pulp product that the present invention provides: negative pressure
Under the conditions of slurry is carried out midge, dehydration so that the polyacrylamide network molecular structure in slurry concentrates on
Wet base surface, defines one layer of smooth film, is difficult to moisture absorption and falls on moulded paper pulp product surface after thermal finalization
Powder.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every profit
The equivalents made by description of the invention content, or directly or indirectly it is used in relevant technical field,
The most in like manner it is included in the scope of patent protection of the present invention.
Claims (7)
1. the production method of a moulded paper pulp product, it is characterised in that: comprise the steps:
Step 1, paper pulp fiber, water and polyacrylamide resin solution are mixed and stirred for after, obtain slurry；
Step 2, under condition of negative pressure, slurry carried out midge and be dehydrated, obtaining the paper of moisture content 60%～70%
Slurry molds wet base；
Step 3, the wet base of paper mould of moisture content 60%～70% is carried out thermal finalization, obtain moisture content 6～10%
Paper mould dry body.
The production method of moulded paper pulp product the most according to claim 1, it is characterised in that: also include
Step 4: carry out the paper mould dry body of moisture content 6～8% cutting and after hole processing, obtaining paper pulp die and be moulded
Product.
The production method of moulded paper pulp product the most according to claim 1, it is characterised in that: described poly-
The feeding quantity of acrylamide resin solution is the 4～10 ‰ of the gross weight of paper pulp fiber and water, described polyacrylamide
The Solute mass fraction of polyimide resin solution is 2～8%.
The production method of moulded paper pulp product the most according to claim 1, it is characterised in that: step 1
In, described slurry has been additionally added binding agent and auxiliary agent, and the feeding quantity of described polyacrylamide resin solution is paper
The 4～10 ‰ of the gross weight of pulp fibres, binding agent, auxiliary agent and water, described polyacrylamide resin solution molten
Matter mass fraction is 2～8%.
The production method of moulded paper pulp product the most according to claim 1, it is characterised in that: step 2
Particularly as follows: the mould with drainage screen is immersed slurry below liquid level 15mm, for negative pressure-0.06MPa
Continue within 2～5 seconds, to carry out midge, after molding thickness to be achieved, mould is removed slurry liquid level, continue
It is dehydrated 10～30 seconds under-0.06MPa negative pressure-pumping effect, prepares moisture content 60～the wet base of paper mould of 70%.
The production method of moulded paper pulp product the most according to claim 1, it is characterised in that: step 3
Specifically include: thermal finalization mould is warmed up to 160～180 DEG C, then by moisture content 60～the paper mould of 70%
Wet base is transferred in thermal finalization mould, after no pressure matched moulds continues 2～8 seconds, increases clamping pressure 100N/cm2
Continue 30～40 seconds, prepare moisture content 6～the paper mould dry body of 10%.
The production method of moulded paper pulp product the most according to claim 1, it is characterised in that: carry out heat
During sizing, before the heating of thermal finalization mould, spray polytetrafluoroethylsolution solution.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2019080242A1 (en) * | 2017-10-24 | 2019-05-02 | 深圳沃普智选科技有限公司 | Plant molding process and equipment |
| CN109881538A (en) * | 2019-02-18 | 2019-06-14 | 杭州西红柿环保科技有限公司 | A kind of enhanced method for paper pulp molding production |
| CN113070048A (en) * | 2021-03-31 | 2021-07-06 | 陕西省能源化工研究院 | CO based on paper pulp molding substrate2Method for preparing adsorbent |
| CN113152143A (en) * | 2021-02-09 | 2021-07-23 | 常州晨航环保科技有限公司 | Preparation method of anti-seepage paper bottle |
| CN114837011A (en) * | 2021-02-02 | 2022-08-02 | 上海当纳利印刷有限公司 | Paper pulp moulded product and its preparation method |
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| CN114837011A (en) * | 2021-02-02 | 2022-08-02 | 上海当纳利印刷有限公司 | Paper pulp moulded product and its preparation method |
| CN113152143A (en) * | 2021-02-09 | 2021-07-23 | 常州晨航环保科技有限公司 | Preparation method of anti-seepage paper bottle |
| CN113070048A (en) * | 2021-03-31 | 2021-07-06 | 陕西省能源化工研究院 | CO based on paper pulp molding substrate2Method for preparing adsorbent |
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Application publication date: 20160831 |