CN108705784A - A kind of manufacturing method of ventilating water proof woven bag - Google Patents
A kind of manufacturing method of ventilating water proof woven bag Download PDFInfo
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- CN108705784A CN108705784A CN201810499120.9A CN201810499120A CN108705784A CN 108705784 A CN108705784 A CN 108705784A CN 201810499120 A CN201810499120 A CN 201810499120A CN 108705784 A CN108705784 A CN 108705784A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/003—Containers for packaging, storing or transporting, e.g. bottles, jars, cans, barrels, tanks
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wrappers (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
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Abstract
The present invention provides a kind of manufacturing method of ventilating water proof woven bag, and interior mucous membrane woven bag includes successively from outside to inside polypropylene woven bag, eva film layer and film layer, is included the following steps:S1:Drying is blended in raw material;S2:Drawing process;S3:Foam process;S4:EVA80%-90%, foaming agent 10%-20% are added after heating in double-layer coextrusion inflation film machine, melting again and are blow molded into mucous membrane in columnar two layers, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer;S5:Knitting process;S6:Compound working procedure;S7:Bag making.The purpose of the present invention is to provide a kind of manufacturing methods for containing good, good water insulation effect the woven bag of permeability of the beings such as fruit, seed, sapling.
Description
Technical field
The present invention relates to Polywoven Bag processing technique field, more particularly to a kind of manufacturer of ventilating water proof woven bag
Method.
Background technology
Polywoven Bag is formed by extrusion, wire drawing, then through weaving, braiding, bag making using polypropylene as primary raw material.
Polywoven Bag, which is often used in, contains the object that flour, seed, sugar, fruits and vegetables, sapling, fertilizer, chemical reagent etc. cannot make moist
Matter, so polybag is needed to have one layer of waterproof and dampproof interior mucous membrane.Currently, woven bag of China's mass production containing interior mucous membrane is will to compile
Plastic outer bag made of knitting and single layer inner lining film bag are using being manually set in together, low production efficiency, high labor cost, and
Inner lining film is waterproof and dampproof polyethylene film, but existing polyethylene film is also prevented from air stream while waterproof and dampproof
It is logical, when contained in Polywoven Bag be fruit, seed, sapling etc. need the being of oxygen often because no oxygen circulation and
Corruption, death cause economic loss, it is therefore desirable to a kind of moisture-proof ventilative interior viscid film plastic woven bag and its manufacturing method are researched and developed,
To contain the beings such as fruit, seed, sapling.
Invention content
The purpose of the present invention is to provide it is a kind of for contain the beings such as fruit, seed, sapling permeability is good, water proof
The manufacturing method of the good ventilating water proof woven bag woven bag of effect.
The present invention provides a kind of manufacturing method of ventilating water proof woven bag, and interior mucous membrane woven bag includes poly- successively from outside to inside
Propylene woven bag, eva film layer and film layer, include the following steps:
S1:Drying is blended in raw material:PP GRANULES, filling master batch, auxiliary agent are put into dry blender and stir drying;
S2:Drawing process:Material after the blending of S1 steps is dry enters extruder, the heating by barrel and spiral shell
The shearing of bar and machine barrel is extruded as film by die head molding, after 30-40 DEG C of water cooling, embryo silk is cut into blade,
And be stretched to form flat filament by drying-plate, it is coiled that flat filament receives silk after thermal finalization by receive silk machine;
S3:Foam process:Low density polyethylene (LDPE) 75%-90%, cassava oxidized starch 9%-20%, AC foaming agent 1%-
5% is added heating in double-layer coextrusion inflation film machine, melting stirring, forms polyethylene foamed melt;
S4:Heating in double-layer coextrusion inflation film machine, melting is added in EVA80%-90%, foaming agent 10%-20% again
After be blow molded into mucous membrane in columnar two layers, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer;
S5:Knitting process:By coiled flat filament by circular weaving machine at cylindrical shape woven bag, by examining, it is qualified to examine
Afterwards, mucous membrane in bilayer is sleeved in cylindrical shape woven bag, then is wound by winder;
S6:Compound working procedure:The woven bag for being cased with interior mucous membrane passes through interior mucous membrane compounding machine, and eva film layer passes through melted by heating
With viscosity, the foaming agent of eva film layer is thermally decomposed, and forms foaming eva film layer by polyethylene foamed film layer and braiding
Bag is bonded to the interior mucous membrane woven bag bonded;
S7:Bag making:The interior mucous membrane woven bag bonded in step S5 is carried by printing, cutting and sew as finished product
Interior viscid film plastic woven bag.
As a further improvement on the present invention, heating temperature is 80 DEG C -90 DEG C in step S3.
As a further improvement on the present invention, the heating temperature in step S6 is 90 DEG C -100 DEG C.
As a further improvement on the present invention, foaming agent is sodium bicarbonate.
As a further improvement on the present invention, the raw material components that eva film layer is prepared in step S3 are EVA85%, foam
Agent 15%, the raw material components for preparing polyethylene layer are polyethylene foamed 83%, cassava oxidized starch 15%, AC foaming agents 2%.
Compared with prior art, the invention has the advantages that:
1. the interior mucous membrane of the present invention is made of film layer and eva film layer, inner layer polyethylene film layer is to use
Polyethylene foamed, cassava oxidized starch and dispersant are blow molded after heating, melting, and are added to the hair of cassava oxidized starch
There is numerous Small Holes gap in bubble film layer, and cassava oxidized starch particle periphery can be formed more interconnected
Tiny hole or channel form reticular structure between the hole in tiny hole and channel and polyethylene foamed so that entire
Film layer has excellent gas penetration performance, can be conducive to the larger substance of this compressed coefficient of gas and quickly spread
By film layer, the diameter better than the hole of film is smaller, can effectively stop that droplet passes through hole, therefore interior strata second
Alkene film can play the effect of air-permeable dampproof, and the being that the needs such as fruit, seed, sapling are contained in long-time keeps oxygen stream
Logical supply, extends the time-to-live of being, reduces loss.
2. the polarity due to polyethylene is very weak, it is therefore desirable to which eva film layer is by film layer and polypropylene woven bag
Fastening is bonded, eva film layer of the invention is using EVA and foaming agent by heating, when melting, and foaming agent does not decompose generation gas
Body, foaming agent are dispersed in eva film layer, when eva film layer enters the heating of interior mucous membrane compounding machine, EVA melted by heating, but
The melting temperature that temperature is not up to polyethylene, then EVA is by inner layer polyethylene film layer and polypropylene woven bag tight bond,
Foaming agent in eva film layer is thermally decomposed, and is generated bulk gas, is formed the hole being largely relatively large in diameter in eva film layer, both
The cementation of EVA can be played can enable extraneous gas to run through eva film again.
3. the polyethylene film of the present invention, using cassava oxidized starch, oxidized starch is starch in acid, alkali, neutral Jie
It is acted on oxidant in matter, it is after soda acid processing degradation to make a kind of converted starch obtained from starch oxidation, oxidized starch
Product, molecular weight, can be more compared to the dosage for starch in the film than starch smaller, the tiny hole of formation
More, the gas permeability of film is more preferable, is that the hydroxymethylation in starch is formed methylol, reduces between hydroxyl and hydrone
Active force further increases the hydrophobic performance of polyethylene film, and wherein cassava oxidized starch has more compared to potato oxidized starch
Good penetrating power, and the easy enzyme of cassava oxidized starch decomposes, and can improve the environmental-protecting performance of woven bag.
Specific implementation mode
Technical scheme of the present invention is clearly and completely described below in conjunction with specific embodiment.Obviously, described
Embodiment be only the present invention a part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained without creative efforts, belongs to guarantor of the present invention
The range of shield.
The present invention discloses a kind of manufacturing method of ventilating water proof woven bag, specific implementation mode is as follows.
Embodiment 1
A kind of manufacturing method of ventilating water proof woven bag, woven bag are thin including polypropylene woven bag, EVA successively from outside to inside
Film layer and film layer, include the following steps:
S1:Drying is blended in raw material:100kg PP GRANULESs, 10kg filling master batch, 20g antioxidants are put into drying
Drying is stirred in blender;
S2:Drawing process:Material after the blending of S1 steps is dry enters extruder, the heating by barrel and spiral shell
The shearing of bar and machine barrel is extruded as film by die head molding, after 30-40 DEG C of water cooling, embryo silk is cut into blade,
And be stretched to form flat filament by drying-plate, it is coiled that flat filament receives silk after thermal finalization by receive silk machine;
S3:Foam process:Low density polyethylene (LDPE) 20kg, cassava oxidized starch 5.3kg, AC foaming agent 1.3kg are added double-deck
It is heated to 80 DEG C, melting stirring in coextrusion blow film machine, forms polyethylene foamed melt;
S4:EVA20kg, foaming agent sodium hydroxide 5kg are added in double-layer coextrusion inflation film machine at a temperature of 80 DEG C again and melted
Mucous membrane in columnar two layers is blow molded into after melting, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer;
S5:Knitting process:By coiled flat filament by circular weaving machine at cylindrical shape woven bag, by examining, it is qualified to examine
Afterwards, mucous membrane in bilayer is sleeved in cylindrical shape woven bag, then is wound by winder;
S6:Compound working procedure:The woven bag for being cased with interior mucous membrane passes through interior mucous membrane compounding machine, and eva film layer adds by compounding machine
Heat to temperature is 90 DEG C, and eva film layer melted by heating has viscosity, heated point of the sodium hydroxide of eva film layer at this temperature
Solution forms foaming eva film layer and polyethylene foamed film layer and woven bag is bonded to the interior mucous membrane woven bag bonded;
S6:Bag making:The interior mucous membrane woven bag bonded in step S5 is carried by printing, cutting and sew as finished product
Interior viscid film plastic woven bag.
Embodiment 2
A kind of manufacturing method of ventilating water proof woven bag, woven bag are thin including polypropylene woven bag, EVA successively from outside to inside
Film layer and film layer, include the following steps:
S1:Drying is blended in raw material:100kg PP GRANULESs, 10kg filling master batch, 20g antioxidants are put into drying
Drying is stirred in blender;
S2:Drawing process:Material after the blending of S1 steps is dry enters extruder, the heating by barrel and spiral shell
The shearing of bar and machine barrel is extruded as film by die head molding, after 30-40 DEG C of water cooling, embryo silk is cut into blade,
And be stretched to form flat filament by drying-plate, it is coiled that flat filament receives silk after thermal finalization by receive silk machine;
S3:Foam process:Double-layer coextrusion is added in low density polyethylene (LDPE) 20kg, cassava oxidized starch 2kg, AC foaming agent 200g
It is heated to 90 DEG C, melting stirring in inflation film machine, forms polyethylene foamed melt;
S4:EVA20kg, foaming agent sodium hydroxide 2.2kg are added in double-layer coextrusion inflation film machine at a temperature of 90 DEG C again
Mucous membrane in columnar two layers is blow molded into after melting, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer;
S5:Knitting process:By coiled flat filament by circular weaving machine at cylindrical shape woven bag, by examining, it is qualified to examine
Afterwards, mucous membrane in bilayer is sleeved in cylindrical shape woven bag, then is wound by winder;
S6:Compound working procedure:The woven bag for being cased with interior mucous membrane passes through interior mucous membrane compounding machine, and eva film layer adds by compounding machine
Heat to temperature is 100 DEG C, and at this temperature, eva film layer has viscosity, the sodium hydroxide of eva film layer by melted by heating
It is thermally decomposed, forms foaming eva film layer and polyethylene foamed film layer and woven bag are bonded to the interior mucous membrane braiding bonded
Bag;
Bag making:The interior mucous membrane woven bag bonded in step S5 is become into finished product with interior by printing, cutting and sew
Viscid film plastic woven bag.
Embodiment 3
A kind of manufacturing method of ventilating water proof woven bag, woven bag are thin including polypropylene woven bag, EVA successively from outside to inside
Film layer and film layer, include the following steps:
S1:Drying is blended in raw material:100kg PP GRANULESs, 10kg filling master batch, 20g antioxidants are put into drying
Drying is stirred in blender;
S2:Drawing process:Material after the blending of S1 steps is dry enters extruder, the heating by barrel and spiral shell
The shearing of bar and machine barrel is extruded as film by die head molding, after 30-40 DEG C of water cooling, embryo silk is cut into blade,
And be stretched to form flat filament by drying-plate, it is coiled that flat filament receives silk after thermal finalization by receive silk machine;
S3:Foam process:Low density polyethylene (LDPE) 20kg, cassava oxidized starch 3.6kg, AC foaming agent 480g are added double-deck total
It squeezes in inflation film machine and is heated to 85 DEG C, melting stirring, form polyethylene foamed melt;
S4:85 DEG C of temperature in double-layer coextrusion inflation film machine are added in EVA%20kg, foaming agent sodium hydroxide 3.5kg again
Mucous membrane in columnar two layers is blow molded into after lower melting, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer;
S5:Knitting process:By coiled flat filament by circular weaving machine at cylindrical shape woven bag, by examining, it is qualified to examine
Afterwards, mucous membrane in bilayer is sleeved in cylindrical shape woven bag, then is wound by winder;
S6:Compound working procedure:The woven bag for being cased with interior mucous membrane passes through interior mucous membrane compounding machine, and eva film layer adds by compounding machine
Heat to temperature is 95 DEG C, and eva film layer melted by heating has viscosity, heated point of the sodium hydroxide of eva film layer at this temperature
Solution, it forms foaming eva film layer and polyethylene foamed film layer and woven bag is bonded to the interior mucous membrane woven bag bonded;
Bag making:The interior mucous membrane woven bag bonded in step S5 is become into finished product with interior by printing, cutting and sew
Viscid film plastic woven bag.
Comparative example 1
A kind of manufacturing method of ventilating water proof woven bag, woven bag are thin including polypropylene woven bag, EVA successively from outside to inside
Film layer and film layer, include the following steps:
S1:Drying is blended in raw material:100kg PP GRANULESs, 10kg filling master batch, 20g antioxidants are put into drying
Drying is stirred in blender;
S2:Drawing process:Material after the blending of S1 steps is dry enters extruder, the heating by barrel and spiral shell
The shearing of bar and machine barrel is extruded as film by die head molding, after 30-40 DEG C of water cooling, embryo silk is cut into blade,
And be stretched to form flat filament by drying-plate, it is coiled that flat filament receives silk after thermal finalization by receive silk machine;
S3:Foam process:Double-layer coextrusion inflation film is added in low density polyethylene (LDPE) 20kg, starch 2kg, AC foaming agent 200g
It is heated to 90 DEG C, melting stirring in machine, forms polyethylene foamed melt;
S4:EVA20kg, foaming agent sodium hydroxide 2.2kg are added in double-layer coextrusion inflation film machine at a temperature of 90 DEG C again
Mucous membrane in columnar two layers is blow molded into after melting, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer, is seen
It examines and finds that internal layer polyethylene foamed film layer film forming is poor, there are more breaking parts in film;
S5:Knitting process:By coiled flat filament by circular weaving machine at cylindrical shape woven bag, by examining, it is qualified to examine
Afterwards, mucous membrane in bilayer is sleeved in cylindrical shape woven bag, then is wound by winder;
S6:Compound working procedure:The woven bag for being cased with interior mucous membrane passes through interior mucous membrane compounding machine, and eva film layer adds by compounding machine
Heat to temperature is 100 DEG C, and at this temperature, eva film layer has viscosity, the sodium hydroxide of eva film layer by melted by heating
It is thermally decomposed, forms foaming eva film layer and polyethylene foamed film layer and woven bag are bonded to the interior mucous membrane braiding bonded
Bag;
Bag making:The interior mucous membrane woven bag bonded in step S5 is become into finished product with interior by printing, cutting and sew
Viscid film plastic woven bag.
Comparative example 2
A kind of manufacturing method of ventilating water proof woven bag, woven bag are thin including polypropylene woven bag, EVA successively from outside to inside
Film layer and film layer, include the following steps:
S1:Drying is blended in raw material:100kg PP GRANULESs, 10kg filling master batch, 20g antioxidants are put into drying
Drying is stirred in blender;
S2:Drawing process:Material after the blending of S1 steps is dry enters extruder, the heating by barrel and spiral shell
The shearing of bar and machine barrel is extruded as film by die head molding, after 30-40 DEG C of water cooling, embryo silk is cut into blade,
And be stretched to form flat filament by drying-plate, it is coiled that flat filament receives silk after thermal finalization by receive silk machine;
S3:Foam process:It is thin that double-layer coextrusion blowing is added in low density polyethylene (LDPE) 20kg, starch 0.5kg, AC foaming agent 200g
It is heated to 90 DEG C, melting stirring in film machine, forms polyethylene foamed melt;
S4:EVA20kg, foaming agent sodium hydroxide 2.2kg are added in double-layer coextrusion inflation film machine at a temperature of 90 DEG C again
Mucous membrane in columnar two layers is blow molded into after melting, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer;
S5:Knitting process:By coiled flat filament by circular weaving machine at cylindrical shape woven bag, by examining, it is qualified to examine
Afterwards, mucous membrane in bilayer is sleeved in cylindrical shape woven bag, then is wound by winder;
S6:Compound working procedure:The woven bag for being cased with interior mucous membrane passes through interior mucous membrane compounding machine, and eva film layer adds by compounding machine
Heat to temperature is 100 DEG C, and at this temperature, eva film layer has viscosity, the sodium hydroxide of eva film layer by melted by heating
It is thermally decomposed, forms foaming eva film layer and polyethylene foamed film layer and woven bag are bonded to the interior mucous membrane braiding bonded
Bag;
Bag making:The interior mucous membrane woven bag bonded in step S5 is become into finished product with interior by printing, cutting and sew
Viscid film plastic woven bag.
Prepared by test bars respectively according to GB/T1038-2000 to woven bag in embodiment 1- embodiments 3《Plastic film and
Thin slice gas-premeable test method pressure differential method》And GB1037-70《Plastic film permeability test method》Carry out permeability
With the test of water vapour permeability, as a result such as the following table 1.
The air transmission coefficient and moisture permeable coefficient of the different embodiments of table 1
Embodiment 1, embodiment 2 and embodiment 3 are the modelings that cassava oxidized starch dosage is presented in mucous membrane formula in changing
Expect the test result of woven bag permeability and water vapour permeability, wherein the bigger permeability of air transmission coefficient is better, and moisture permeable coefficient is got over
Greatly, the water isolating that blocks water is poorer, it can be deduced that, in a certain range, the increase of cassava oxidized starch dosage dosage in formula is compiled
The permeability of bag is knitted into increase tendency, but embodiment 3 is more preferable than the permeability of embodiment 2, water vapour permeability is in certain model
Increase with the increase of middle cassava oxidized starch dosage dosage in enclosing, from comprehensive performance embodiment 2 be interior mucous membrane most
Good proportioning.
From comparative example 1 the difference from example 2 is that comparative example 1 uses starch, and uses wood in embodiment 2
Potato oxidized starch, the test woven bag of comparative example 1 are more poor than the permeability of the test woven bag of embodiment 2, and compare water proof
Performance is worse, is acted on oxidant in acid, alkali, neutral medium this is because oxidized starch is starch, makes starch oxidation and obtain
A kind of converted starch arrived, oxidized starch are the products after soda acid processing degradation, molecular weight than starch smaller, compared to
Dosage for starch in the film can be more, and the tiny hole of formation is more, and the gas permeability of film is more preferable, and being will be in starch
Hydroxymethylation form methylol, reduce the active force between hydroxyl and hydrone, further increase the hydrophobic of polyethylene film
Performance.
1 film forming of comparative example is poor, and observation finds that internal layer polyethylene foamed film layer film forming is poor, exists in film more multibreak
Place is split, because starch is coarseer than oxidized starch particle, film forming fracture is more in the case of same dosage, and starch is with more
Hydroxyl, hydrophily is strong, then in mucous membrane water isolating it is poor compared with the water-resisting property of mucous membrane in the woven bag for using oxidized starch, therefore
The filming performance and hydrophobic performance of mucous membrane in same dosage can be improved using oxidized starch.
Comparative example 2 be reduce the obtained test woven bag of starch dosage, although from data as can be seen that woven bag every
Water performance ratio embodiment 1 and embodiment 3 are good, but its permeability greatly reduces, and are unsatisfactory for the present invention and prepare woven bag of breathing freely
Purpose.
In summary factor considers that best embodiment is embodiment 3.
A kind of manufacturing method of ventilating water proof woven bag provided by the present invention is described in detail above.Herein
Applying specific embodiment, principle and implementation of the present invention are described, and the explanation of above example is only intended to sides
Assistant solves the method and its core concept of the present invention.It should be pointed out that for those skilled in the art, not
, can be with several improvements and modifications are made to the present invention under the premise of being detached from the principle of the invention, these improvement and modification are also fallen into
In the protection domain of the claims in the present invention.
Claims (5)
1. a kind of manufacturing method of ventilating water proof woven bag, it is characterised in that:Woven bag includes that polypropylene is compiled successively from outside to inside
Bag, eva film layer and film layer are knitted, is included the following steps:
S1:Drying is blended in raw material:PP GRANULES, filling master batch, auxiliary agent are put into dry blender and stir drying;
S2:Drawing process:Material after the blending of S1 steps is dry enters extruder, by the heating of barrel and screw rod with
The shearing of machine barrel is extruded as film by die head molding, after 30-40 DEG C of water cooling, cuts into embryo silk with blade, and pass through
It crosses drying-plate to be stretched to form flat filament, it is coiled that flat filament receives silk after thermal finalization by receive silk machine;
S3:Foam process:Low density polyethylene (LDPE) 75%-90%, cassava oxidized starch 9%-20%, AC foaming agent 1%-5% add
Enter in double-layer coextrusion inflation film machine to heat, melt stirring, forms polyethylene foamed melt;
S4:Heating in double-layer coextrusion inflation film machine, melting after-blow is added in EVA80%-90%, foaming agent 10%-20% again
It is moulded into mucous membrane in columnar two layers, wherein outer layer is eva film layer, and internal layer is polyethylene foamed film layer;
S5:Knitting process:It, after the assay was approved, will by examining by coiled flat filament by circular weaving machine at cylindrical shape woven bag
Mucous membrane is sleeved in cylindrical shape woven bag in bilayer, then is wound by winder;
S6:Compound working procedure:The woven bag for being cased with interior mucous membrane passes through interior mucous membrane compounding machine, and eva film layer has by melted by heating
The foaming agent of viscosity, eva film layer is thermally decomposed, and is formed foaming eva film layer and is glued polyethylene foamed film layer and woven bag
Form the interior mucous membrane woven bag bonded;
S7:Bag making:The interior mucous membrane woven bag bonded in step S6 is become into finished product with interior viscous by printing, cutting and sew
Film Polywoven Bag.
2. a kind of manufacturing method of ventilating water proof woven bag according to claim 1, it is characterised in that:The step S3 and
Heating temperature is 80 DEG C -90 DEG C in step S4.
3. a kind of manufacturing method of ventilating water proof woven bag according to claim 1, it is characterised in that:In the step S6
Heating temperature be 90 DEG C -100 DEG C.
4. a kind of manufacturing method of ventilating water proof woven bag according to claim 1, it is characterised in that:The foaming agent is
Sodium bicarbonate.
5. a kind of manufacturing method of ventilating water proof woven bag according to claim 1, it is characterised in that:The step S3 and
The raw material components that eva film layer is prepared in step S4 are EVA85%, foaming agent 15%, and the raw material components for preparing polyethylene layer are
Polyethylene foamed 83%, cassava oxidized starch 15%, AC foaming agents 2%.
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CN110406787A (en) * | 2019-07-08 | 2019-11-05 | 天津市久大塑料制品有限公司 | A kind of low smell, ventilating water proof woven bag and its manufacturing method |
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CN110217476A (en) * | 2019-05-31 | 2019-09-10 | 应城市新都化工塑业有限公司 | A kind of waterproof and dampproof woven bag and preparation method thereof |
CN110406787A (en) * | 2019-07-08 | 2019-11-05 | 天津市久大塑料制品有限公司 | A kind of low smell, ventilating water proof woven bag and its manufacturing method |
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