CN104369500A - Forage grass film and manufacturing method thereof - Google Patents
Forage grass film and manufacturing method thereof Download PDFInfo
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- CN104369500A CN104369500A CN201410717099.7A CN201410717099A CN104369500A CN 104369500 A CN104369500 A CN 104369500A CN 201410717099 A CN201410717099 A CN 201410717099A CN 104369500 A CN104369500 A CN 104369500A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/08—Copolymers of ethene
- C08L23/0807—Copolymers of ethene with unsaturated hydrocarbons only containing more than three carbon atoms
- C08L23/0815—Copolymers of ethene with aliphatic 1-olefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/03—3 layers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/552—Fatigue strength
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2439/00—Containers; Receptacles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/08—Copolymers of ethene
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/18—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms
- C08J2423/20—Homopolymers or copolymers of hydrocarbons having four or more carbon atoms having four to nine carbon atoms
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- Chemical & Material Sciences (AREA)
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- Chemical Kinetics & Catalysis (AREA)
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- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
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- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a forage grass film and a manufacturing method thereof, in particular to a thin film used for silaging and freshness retaining of forage grass. The forage grass film sequentially comprises at least one composition layer A, at least one composition layer B, at least one composition layer C which are arranged according to a certain sequence. The manufacturing method includes the following steps: A, preparing the layer A, the layer B, the layer C and the layer D according to a raw material ratio relationship; B, adjusting arranging sequence of the layers through a logistics distribution selecting plug of a multifunctional feeding block; C, adjusting layer thickness proportion of the layers through a diversion wing plate and a distribution sheath of the multifunctional feeding block; D, flowing into a coextrusion die head through a melt runner of the multifunctional feeding block; E, forming coextrusion solution flow, and enabling the coextrusion solution flow to flow out from a die lip at constant pressure to form a thin film; F, matting the surface of the thin film through a matting flow extending roller; G, winding through a winder. The forage grass film has the advantages of high self-adhesiveness, extremely excellent penetration resistance, excellent aging resistance, high stretch ratio and the like, is suitable for gathering package of forage grass and can be used for storing the forage grass and playing a role in freshness retaining.
Description
Technical field
the present invention relates to a kind of herbage film and preparation method thereof, especially a kind of as the fresh-keeping film of grass silage.
Background technology
low-density herbage film, owing to having good transparency, heat sealability, and energy waterproof, moistureproof, tensile strength is low, the features such as tensile elongation is large, be widely used, also the technique of diversified preparation low-density herbage film is there is in prior art, but low-density herbage film of the prior art is all not suitable for the fresh-keeping of herbage, there is puncture-resistant poor performance, anti ageing property is not good enough, draw ratio is not high, the defects such as fresh-keeping effect difference, therefore, research and develop and be a kind ofly suitable for packaging herbage and to be beneficial to the fresh-keeping herbage film of herbage be the difficult problem that one of ordinary skill in the art face.
Summary of the invention
the technical problem that the present invention solves is to provide a kind of herbage film, and this herbage film has good adaptation and hot strength.
In view of this, the invention provides a kind of herbage film: comprise at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order successively, comprising BACAB arrangement architecture, and the thickness proportion between each layer is 1:1:2:1:1.
Preferred scheme is that a kind of herbage film comprises at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order, comprising BCACB structure, wherein thickness proportion is followed successively by 1:2:1:2:1.
Further preferred scheme is for comprising at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order, comprising ABBBC structure, wherein thickness proportion is followed successively by 1:1:1:1:2.
Wherein A layer comprises the metallocene linear low density polyethylene 82 ~ 90% by mass component composition, thickening masterbatch 6 ~ 10%, anti-aging mother material 4 ~ 8%;
Wherein B layer comprises the metallocene linear low density polyethylene 90 ~ 94% being added with nano imvite by mass component composition, brightens shading masterbatch 6 ~ 10%;
Wherein C layer comprises the metallocene linear low density polyethylene 92 ~ 96% by mass component composition, anti-aging mother material 4 ~ 8%.
And wherein the thickening masterbatch of A layer is 60% polybutene and LLDPE carrier compositions, anti-aging mother material is the composition of light stabilizer, ultraviolet ray adsorbents and LLDPE carrier; Described B layer brightens the composition that shading masterbatch is titanium dioxide and proactively answer to a riddle polyethylene support; Described C layer anti-aging mother material is the composition of light stabilizer, ultra-violet absorber and property low density polyethylene (LDPE) carrier.
The metallocene linear low density polyethylene being added with nano imvite wherein in B layer is that the imvite and metallocene linear-low density polyethylene by choosing 600 order-800 order specifications is prepared from through blending technology.
The present invention also provides a kind of preparation method of above-mentioned herbage film: comprise the following steps:
A, according to pulp furnish relation preparation A layer, B layer, C layer;
B, select putting in order of the plug each layer of adjustment by the flow distribution of multi-functional feed block;
C, adjusted the thickness ratio of each layer by the shunting wing plate of multi-functional feed block and distribution sheath;
D, flow into coextrusion die head by the melt flow channel of multi-functional feed block;
E, form the molten stream of co-extrusion flowing out from die lip with constant pressure, form film;
F, by extinction casting roller, delustring process is carried out to film surface;
G, carry out rolling by winder.
Wherein in step (A), A layer pulp furnish closes and is: metallocene linear low density polyethylene 82 ~ 90%, thickening masterbatch 6 ~ 10%, anti-aging mother material 4 ~ 8%; The proportion relation of B layer raw material is: the metallocene linear low density polyethylene 90 ~ 94% being added with nano imvite, brightens shading masterbatch 6 ~ 10%; The proportion relation of C layer raw material is: metallocene linear low density polyethylene 92 ~ 96%, anti-aging mother material 4 ~ 8%.
Multi-functional feed block described in step (B) comprises material and distributes selection plug, shunting sheath, shunting wing plate and melt flow channel chamber.
Described coextrusion die head in step (D) is flat shoulder formula single current general formula.
Rolling mode in step (G) comprises surperficial rolling, center winding, centre of surface rolling.
The invention provides a kind of herbage film, comprise at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order, wherein A layer pulp furnish closes and is: metallocene linear low density polyethylene 82 ~ 90%, thickening masterbatch 6 ~ 10%, anti-aging mother material 4 ~ 8%; The proportion relation of B layer raw material is: the metallocene linear low density polyethylene 90 ~ 94% being added with nano imvite, brightens shading masterbatch 6 ~ 10%; The proportion relation of C layer raw material is: metallocene linear low density polyethylene 92 ~ 96%, anti-aging mother material 4 ~ 8%.And the object adding thickening masterbatch is in the feed the surperficial tack in order to increase film, to prevent film in use due to tack pine bundle not, cause damage.The object adding anti-aging mother material is used to prevent the aging of film, strengthens its weatherability, extends its operating period.Add the light transmittance that the object brightening shading masterbatch is used to reduce film, rot to prevent the herbage in bale packing from carrying out too much photosynthesis.The object adding the metallocene linear-low density polyethylene of imvite is used to be to increase thin film strength.
Beneficial effect: herbage film of the present invention, take metallocene linear-low density polyethylene as a kind of plastic package material of primary raw material processing, it is strong that it has tack, puncture-resistant performance is splendid, anti ageing property is excellent, draw ratio advantages of higher, is suitable as the assembly package of herbage, can be used for storing herbage and playing fresh-keeping effect.Packing its distinguishing feature as herbage is: ton cost is low, and packaging efficiency is high, and the amount of labour used is few, and effect is very good, greatly reduces the waste of forage nutrition, improves the utilization rate of herbage, can shorten the marketing period of livestock, improves meat quality.
Accompanying drawing explanation
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is the second structural representation of the present invention.
Fig. 3 is the third structural representation of the present invention.
Wherein: 1, A layer 2, B layer 3, C layer.
Specific embodiment
In order to understand the present invention further, below in conjunction with Figure of description and 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.
Embodiment 1
The embodiment of the invention discloses a kind of herbage film, the structural representation of polyethylene film provided by the invention is depicted as see Fig. 1, it comprises successively: B layer, A layer, C layer, A layer, B layer, wherein the ratio of each layer thickness is: 1:1:2:1:1, wherein A layer comprises the metallocene linear low density polyethylene 82 ~ 90% by mass component composition, thickening masterbatch 6 ~ 10%, anti-aging mother material 4 ~ 8%; B layer comprises the metallocene linear low density polyethylene 90 ~ 94% being added with nano imvite by mass component composition, brightens shading masterbatch 6 ~ 10%; C layer comprises the metallocene linear low density polyethylene 92 ~ 96% by mass component composition, anti-aging mother material 4 ~ 8%.
Wherein the thickening masterbatch of A layer is 60% polybutene and LLDPE carrier compositions, and anti-aging mother material is the composition of light stabilizer, ultraviolet ray adsorbents and LLDPE carrier; B layer brightens the composition that shading masterbatch is titanium dioxide and proactively answer to a riddle polyethylene support; C layer anti-aging mother material is the composition of light stabilizer, ultra-violet absorber and property low density polyethylene (LDPE) carrier.And the metallocene linear low density polyethylene that B layer is added with nano imvite is prepared from through blending technology by the imvite and metallocene linear-low density polyethylene choosing 600 order-800 order specifications.
Wherein preparation method comprises the following steps:
A, according to pulp furnish relation preparation A layer, B layer, C layer;
B, select putting in order of the plug each layer of adjustment by the flow distribution of multi-functional feed block;
C, adjusted the thickness ratio of each layer by the shunting wing plate of multi-functional feed block and distribution sheath;
D, flow into coextrusion die head by the melt flow channel of multi-functional feed block;
E, form the molten stream of co-extrusion flowing out from die lip with constant pressure, form film;
F, by extinction casting roller, delustring process is carried out to film surface;
G, carry out rolling by winder.
Wherein in step (A), A layer pulp furnish closes and is: metallocene linear low density polyethylene 82 ~ 90%, thickening masterbatch 6 ~ 10%, anti-aging mother material 4 ~ 8%; The proportion relation of B layer raw material is: the metallocene linear low density polyethylene 90 ~ 94% being added with nano imvite, brightens shading masterbatch 6 ~ 10%; The proportion relation of C layer raw material is: metallocene linear low density polyethylene 92 ~ 96%, anti-aging mother material 4 ~ 8%.
Multi-functional feed block described in step (B) comprises material and distributes selection plug, shunting sheath, shunting wing plate and melt flow channel chamber.
Described coextrusion die head in step (D) is flat shoulder formula single current general formula.
Rolling mode in step (G) comprises surperficial rolling, center winding, centre of surface rolling.
Embodiment 2
The embodiment of the invention discloses a kind of herbage film, be depicted as the structural representation of polyethylene film provided by the invention see Fig. 2, it comprises successively: B layer, C layer, A layer, C layer, B layer, and wherein the ratio of each number of plies thickness is: 1:2:1:2:1.
Each component proportion is identical with embodiment 1 with preparation method.
Embodiment 3
The embodiment of the invention discloses a kind of herbage film, be depicted as the structural representation of polyethylene film provided by the invention see Fig. 2, it comprises successively: A layer, B layer, B layer, B layer, C layer, and wherein the ratio of each number of plies thickness is: 1:1:1:1:2.
Each component proportion is identical with embodiment 1 with preparation method.
The principle of this preparation method is: raw material and auxiliary material are transported to middle hopper through vacuum intaking device, accurate weighing again through loading component joins in extruder in the ratio of setting, raw material melting in extruder, plasticizing, mixing, compacting, enter feed block with constant pressure and output quantity; Distribute level and the ratio of melt flow at this, then enter die head runner, be distributed in the die head runner of overall with, flow to casting roller from die lip mouth; The average thickness of film is determined by the ratio of the speed of casting roller and the extrusion capacity of melt flow, and calibrator records is the cross-section curve of film, and control to carry out rapid adjustment to the thickness curve of film by PLC, film enters rolling unit through the traction of draw-gear, the specification that user can be become to require film dividing by online cutting device, and cutting out two edge strips, edge strip enters pulverizer through blowing of blower fan, is ground into fine hair and is transmitted back in extruder.And the film point to cut by rolling on refill, by length or the automatic change of lap of diameter of setting, through inspection, the labelled and quality certification, put in storage as finished product.
From such scheme, the invention solves following problem:
(1) vacuum intake blockage problem is solved:
Because thickening masterbatch viscosity is comparatively large, masterbatch vacuum intake pipe, weighing device and the conveyance conduit of very easily causing adhered to one another blocks, thus has a strong impact on accurate-metering and the feeding of masterbatch, causes properties of product unstable.Technical scheme provided by the invention, by increasing masterbatch 20%-40%, add polyethylene particle 60%-80% physical agitation 10 minutes, polyethylene and thickening masterbatch are uniformly mixed in proportion and make masterbatch, surface particles viscosity is reduced, then stirs with raw material in proportion, by vacuum intake pipe material loading, so just make the supply of raw material accurately smooth and easy, ensure that the stable of properties of product; And the ratio of thickening masterbatch can be adjusted according to seasonal variations, as: the migration of tackifier is relevant with the temperature deposited, its migration precipitation in summer speed and winter migration velocity slow, therefore the ratio adding thickening masterbatch when producing wrap film for herbage adjusts to some extent because of seasonal variations, that is: addition more than addition in summer about 1% during winter production; Also can all add thickening masterbatch on two top layers, thus obtain the wrap film for herbage that two sides all has tack.
(2) balance of obscurity and anti ageing property:
Herbage film of the present invention adds brighten shading masterbatch, so its outward appearance is white because reducing the light transmittance of film.But, the common shading masterbatch that brightens affects very large on thin film strength and anti ageing property, brighten shading masterbatch by have selected to add, and select suitable anti-aging mother material with the ageing resistace of enhanced film, thus reach the balance of obscurity and anti ageing property.
(3) rolling flatness: herbage film of the present invention is because its deflection is very poor and tack is extremely strong, and the air be involved in when rolling is not easily discharged, film volume very easily goes out wrinkle.In addition, it is many to cut specification, concerning rolling being also suitable difficulty.Production line has three kinds of rolling modes to select: surperficial rolling, center winding and gap rolling, center surface rolling.The present invention have selected center winding, and by film press roll by original hardness low to change hardness into high, the air capacity be involved in wrapup procedure can be reduced widely like this, film be rolled up smooth.And the air be involved in during change of lap and in wrapup procedure is not easily discharged by surperficial rolling and center surface rolling, produce serious fold, so that affect the quality of whole film volume.
Wherein, in embodiment 1 ~ 3, extruder technical parameter is set as follows:
Extruder temperature controls: A layer: 260-270 DEG C; B layer: 260-280 DEG C; C:260-270 DEG C; Die head temperature controls: 260-280 DEG C; Casting roller temperature: 20-35 DEG C; Winder major parameter: drawing tension 60N, touches roller and drives tension force 80N, centre-driven tension force 85N, centre-driven tension force slope 0; Film press roll pressure 2.5bar.
The mechanical experimental results of herbage film prepared by table 1 embodiment 1.
As can be seen from Table 1, the indices of herbage film of the present invention all higher than or be equal to international like product standard, the new product manufactured experimently is through national plastic products quality supervisory detection Spot detection, and physical properties index all exceedes product standard requirement.
The mechanical experimental results of herbage film prepared by table 2 embodiment 2.
As can be seen from Table 2, the indices of herbage film of the present invention all higher than or be equal to international like product standard, the new product manufactured experimently is through national plastic products quality supervisory detection Spot detection, and physical properties index all exceedes product standard requirement.
The mechanical experimental results of herbage film prepared by table 3 embodiment 2.
As can be seen from Table 3, the indices of herbage film of the present invention all higher than or be equal to international like product standard, the new product manufactured experimently is through national plastic products quality supervisory detection Spot detection, and physical properties index all exceedes product standard requirement.
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 (10)
1. herbage film, it is characterized in that, comprise at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order, wherein said A layer comprises the metallocene linear low density polyethylene 82 ~ 90% by mass component composition, thickening masterbatch 6 ~ 10%, anti-aging mother material 4 ~ 8%;
Wherein said B layer comprises the metallocene linear low density polyethylene 90 ~ 94% being added with nano imvite by mass component composition, brightens shading masterbatch 6 ~ 10%;
Wherein said C layer comprises the metallocene linear low density polyethylene 92 ~ 96% by mass component composition, anti-aging mother material 4 ~ 8%.
2. herbage film according to claim 1, it is characterized in that, comprise at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order, comprising BACAB arrangement architecture, wherein the ratio of the thickness of each layer is 1:1:2:1:1.
3. herbage film according to claim 1, it is characterized in that, comprise at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order, comprising BCACB structure, wherein thickness proportion is followed successively by 1:2:1:2:1.
4. herbage film according to claim 1, it is characterized in that, comprise at least one deck A layer composition, at least one deck B layer composition, at least one deck C layer composition by the composition that necessarily puts in order, comprising ABBBC structure, wherein thickness proportion is followed successively by 1:1:1:1:2.
5. according to the herbage film described in claim 1 ~ 4, it is characterized in that, the thickening masterbatch of described A layer is 60% polybutene and LLDPE carrier compositions, and anti-aging mother material is the composition of light stabilizer, ultraviolet ray adsorbents and LLDPE carrier; Described B layer brightens the composition that shading masterbatch is titanium dioxide and proactively answer to a riddle polyethylene support; Described C layer anti-aging mother material is the composition of light stabilizer, ultra-violet absorber and property low density polyethylene (LDPE) carrier.
6. herbage film according to claim 1, it is characterized in that, the metallocene linear low density polyethylene that described B layer is added with nano imvite is prepared from through blending technology by the imvite and metallocene linear-low density polyethylene choosing 600 order-800 order specifications.
7. the preparation method of herbage film, is characterized in that, comprises the following steps:
A, according to pulp furnish relation preparation A layer, B layer, C layer;
B, select putting in order of the plug each layer of adjustment by the flow distribution of multi-functional feed block;
C, adjusted the thickness ratio of each layer by the shunting wing plate of multi-functional feed block and distribution sheath;
D, flow into coextrusion die head by the melt flow channel of multi-functional feed block;
E, form the molten stream of co-extrusion flowing out from die lip with constant pressure, form film;
F, by extinction casting roller, delustring process is carried out to film surface;
G, carry out rolling by winder.
8. herbage membrane preparation method according to claim 6, is characterized in that, in described step (A), described A layer pulp furnish closes and be: metallocene linear low density polyethylene 82 ~ 90%, thickening masterbatch 6 ~ 10%, anti-aging mother material 4 ~ 8%;
The proportion relation of B layer raw material is: the metallocene linear low density polyethylene 90 ~ 94% being added with nano imvite, brightens shading masterbatch 6 ~ 10%;
The proportion relation of C layer raw material is: metallocene linear low density polyethylene 92 ~ 96%, anti-aging mother material 4 ~ 8%.
9. herbage membrane preparation method according to claim 6, is characterized in that, the described multi-functional feed block described in step (B) comprises material and distributes selection plug, shunting sheath, shunting wing plate and melt flow channel chamber.
10. herbage membrane preparation method according to claim 6, is characterized in that, the described coextrusion die head in described step (D) is flat shoulder formula single current general formula, and the rolling mode in described step (G) comprises center winding.
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| CN201410717099.7A CN104369500B (en) | 2014-12-02 | 2014-12-02 | Forage grass film and manufacturing method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107128045A (en) * | 2017-04-24 | 2017-09-05 | 新昌县瑞森农产品有限公司 | A kind of new Grass Silage Films |
| CN109438801A (en) * | 2018-09-26 | 2019-03-08 | 天津泽恒包装制品有限公司 | A kind of formula of herbage film composite master batch |
| CN111016370A (en) * | 2019-12-24 | 2020-04-17 | 厦门聚富塑胶制品有限公司 | Silage packaging film and preparation method thereof |
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| CN109438801A (en) * | 2018-09-26 | 2019-03-08 | 天津泽恒包装制品有限公司 | A kind of formula of herbage film composite master batch |
| CN111016370A (en) * | 2019-12-24 | 2020-04-17 | 厦门聚富塑胶制品有限公司 | Silage packaging film and preparation method thereof |
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| CN104369500B (en) | 2017-04-26 |
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