CN108297368A - A kind of processing method of GAG high barrier sheets and its packing container - Google Patents

A kind of processing method of GAG high barrier sheets and its packing container Download PDF

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Publication number
CN108297368A
CN108297368A CN201711390215.9A CN201711390215A CN108297368A CN 108297368 A CN108297368 A CN 108297368A CN 201711390215 A CN201711390215 A CN 201711390215A CN 108297368 A CN108297368 A CN 108297368A
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CN
China
Prior art keywords
layer material
processing method
high barrier
gag
cooling
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Pending
Application number
CN201711390215.9A
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Chinese (zh)
Inventor
林卓辉
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ZHUOGAOTAI(GUANGZHOU) PACKAGE CO Ltd
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ZHUOGAOTAI(GUANGZHOU) PACKAGE CO Ltd
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Priority to CN201711390215.9A priority Critical patent/CN108297368A/en
Publication of CN108297368A publication Critical patent/CN108297368A/en
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Classifications

    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/002—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor characterised by the choice of material
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/14—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor using multilayered preforms or sheets
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/266—Auxiliary operations after the thermoforming operation
    • B29C51/268—Cutting, rearranging and joining the cut parts
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming
    • 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
    • B32B27/08—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 of synthetic resin
    • 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
    • B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • 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
    • B32B2250/24—All layers being polymeric
    • B32B2250/244—All polymers belonging to those covered by group B32B27/36
    • 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
    • B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/40—Properties of the layers or laminate having particular optical properties
    • B32B2307/412—Transparent
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • 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
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • 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
    • B32B2439/70—Food packaging

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

The present invention is the processing method of a kind of GAG high barrier sheets and its packing container, have in the packaging of middle and high resistance oxygen requirement applied to product, it is gone inside a certain proportion of MX nylon to the APET materials of middle layer by adding, substantially the appearance of sheet material is not changed, the barrier property of material can also be effectively improved, the diffusion etc. that the shelf-life of product can be extended, freshness is improved, prevent smell.

Description

A kind of processing method of GAG high barrier sheets and its packing container
Technical field
The present invention relates to packaging fields, and in particular to a kind of process of the easy heat sealed package container of GAG high-barriers.
Background technology
GAG is three layers of composite sheet.It is to be produced by proper ratio co-extrusion by middle layer APET, upper layer and lower layer PETG raw materials Three layers of composite sheet, especially suitable for the packing box that need to be bonded through high-frequency heat sealing and glue bonds.With excellent transparency, processability The excellent, advantages such as hot formability is good, food hygiene is excellent.
However the barrier property of existing GAG materials is not high, when product needs the packaging of high resistant oxygen requirement, commonly The requirement is not achieved in GAG materials.Especially in the demand of food container, food requires ratio for the barrier property of packing container It is higher, it is desirable to be able to extend the shelf-life of food, improve freshness, prevent the features such as diffusion of smell.
Invention content
For above deficiency, the present invention provides a kind of preparations of the material for the high obstructing performance that GAG materials can be improved Method adds MX nylon by the middle layer in GAG materials.The processing temperature of MX nylon and APET are very close, and MX nylon is A kind of material to oxygen and carbon dioxide with superior barrier properties, by adding a certain proportion of MX nylon to APET materials The inside is gone, and does not change the appearance of sheet material substantially, moreover it is possible to effectively improve the barrier property of material.
The present invention is a kind of processing method of GAG high barrier sheets, and the processing method includes the following steps：
(1) material preparation process includes the preparation of upper surface layer material, undersurface layer material and middle layer material, wherein
Upper surface layer material and undersurface layer material are stirred by PCTG/PETG and slipping agent, wherein described The weight accounting of the PETG/PCTG in upper surface layer material and undersurface layer material is 97%~99%, the upper table The slipping agent weight accounting in face layer material and undersurface layer material is 1%~3%；
Middle layer material is stirred in proportion by APET polyester slices and MX nylon, wherein the APET polyester is cut Piece accounts for the 70%~95% of middle layer weight of material ratio, and the MX nylon accounts for the 5%~30% of middle layer weight of material ratio；
(2) three-layer co-extruded step, by the volume of upper surface layer material, middle layer material and undersurface layer material respectively according to Account for total volume 2.5%~10%, 80%~95%, 2.5%~10% ratio co-extrusion, wherein upper surface layer material and lower surface The ratio of layer material is identical, and the thickness accounting of resulting sheet is respectively 2.5%~10% after co-extrusion, 80%~95%, 2.5%~ 10%；
(3) three roller cooling and shaping steps, the sheet material after cooling is three-layer co-extruded；
(4) step is wound, the GAG high barrier sheets obtained after cooling and shaping are wound.
Further include drying steps in the material preparation process to further realize the present invention, the drying steps packet It includes：
Mixed middle layer material is dried by dehumidifying heat pump, 140 DEG C~180 DEG C of drying temperature, drying time 4h~8h, dry dew point≤- 50 DEG C；
Mixed upper surface layer material, undersurface layer material are dried by dehumidifying heat pump, 60 DEG C of drying temperature~ 85 DEG C, drying time 6h~10h, dry dew point≤- 50 DEG C.
In order to further realize the present invention, three-layer co-extruded sheet extruder, host is used to adopt in the three-layer co-extruded step With double screw extruder or single screw extrusion machine, slave uses single screw extrusion machine, 255 DEG C~285 DEG C of host extrusion temperature secondary 240 DEG C~255 DEG C of machine.
In order to further realize the present invention, the cooling temperature of the three rollers cooling and shaping step, pressure roller is 20 DEG C~30 DEG C, the cooling temperature of fixed roll is 25 DEG C~40 DEG C, and the cooling temperature of setting roll is 25 DEG C~40 DEG C.
In order to further realize the present invention, the described method comprises the following steps：
(1) prepare GAG high barrier sheets, the GAG high barrier sheets are according to described in any one of claim 1-4 The processing method machine-shaping of GAG high barrier sheets；
(2) positive/negative-pressure thermoforming；
(3) it is quickly cooled down；
(4) automatic cutting obtains packing container.
In order to further realize the present invention, the positive/negative-pressure thermoforming step includes carrying out GAG high barrier sheets two-sided Heating, is molded by positive and negative compression mould, and wherein GAG high barrier sheets are by infrared ray temperature control, 120 DEG C~150 DEG C of furnace temperature, Heating time 1s-4s.
In order to further realize the present invention, described to be quickly cooled down step specifically, mold inner flow passage cools down, cooling temperature is 20 DEG C~40 DEG C, cooling time 0.5s~3s.
In order to further realize the present invention, in the positive/negative-pressure thermoforming step, its hot edge seal bottom margin position at Type has loxosis.
In order to further realize the present invention, in the positive/negative-pressure thermoforming step, in the hot edge seal bottom sides of packing container Edge position forms several screens.
In the positive/negative-pressure thermoforming step, several cards are formed in the hot edge seal bottom margin position of packing container Position.
Beneficial effects of the present invention：
1, through the invention gained packing container have high obstructing performance, can the gases such as blocking oxygen and carbon dioxide, Have the transparency of common GAG materials good simultaneously, the good performance of heat sealability.
2, the packing container of present invention gained can be applied in the packaging for having middle and high resistance oxygen requirement to product, can be used for eating In product packaging, such as supermarket fills pallet, chocolate inner pallet, sauce cup, the equipment for prepn. of yoghurt etc. of prepared food, can also be applied to other necks Domain, for example, cosmetic package field.
3, the shelf-life of product can be extended using the packing container obtained by the present invention, freshness is improved, prevent smell Diffusion etc..
Description of the drawings
Fig. 1 is the product thermoforming process route map of the present invention；
Fig. 2 is the process flow chart of the material preparation of the present invention；
Specific implementation mode
With reference to embodiment, the present invention will be further described.
The packing container of the present embodiment is the heat sealability for increasing its packaging, is increased in its hot edge seal bottom margin position oblique Position, to allow container to fall on heat seal die automatically, prevents container from deviating；Meanwhile also in the hot edge seal bottom margin of packing container Position increases screens, high balance when can limit heat-sealing, control heat seal strength and heat-sealing uniformity.
According to Fig. 1, the product thermoforming process route of packing container is：
1) stock (using GAG high barrier sheets)；
2) molding (first by GAG high barrier sheet Double-side Heatings, is molded, mold molding is using complete by positive/negative-pressure mold heat Automatic moulding production line, wherein GAG high barrier sheets pass through infrared ray temperature control, 120 DEG C~150 DEG C of furnace temperature, electric furnace length Divide three sections of heating, heating time 1-4s)；
3) be quickly cooled down (mold inner flow passage cool down, 20 DEG C~40 DEG C of cooling temperature, cooling time 0.5s~3s)；
4) automatic cutting stacks and (obtains packing container).
The reason of packing container of gained of the invention has high obstructing performance essentially consists in stock part, i.e. GAG high-barriers Sheet material, wherein
The ingredient of GAG high barrier sheets is：
Upper layer is identical as submucosa components, is superficial layer, material is PETG or PCTG, while being added a certain proportion of smooth Agent, wherein PETG or PCTG account for the 97%~99% of the layer weight ratio, and slipping agent accounts for the layer weight ratio 1%~3%, molding Thickness ratio is 2.5%~10% afterwards, and upper and lower thickness primarily serves smooth and heat-sealing effect than identical.
Middle layer is high-obstruction, and material is the mixture of APET and MX nylon, and wherein APET accounts for the layer weight ratio 70%~95%, MX nylon account for the 5%~30% of the layer weight ratio, and thickness ratio is 80%~95% after molding, is primarily served Improve the effect of barrier property.
According to fig. 2, GAG high barrier sheets preparation process flow：
1) middle layer material prepares, and APET polyester slices and MX nylon are stirred according to a certain percentage, pass through dehumidifying Drying machine is dried, 140 DEG C~180 DEG C, drying time 4h~8h of drying temperature, dry dew point≤- 50 DEG C；
2) upper and lower layer material prepares, and PCTG/PETG and a certain proportion of slipping agent are stirred, and pass through dehumidifying heat pump It is dry, 60 DEG C~85 DEG C, drying time 6h~10h of drying temperature, dry dew point≤- 50 DEG C；
3) three-layer co-extruded, the volume of upper surface layer material, middle layer material and undersurface layer material is respectively according to accounting for totality Product 2.5%~10%, 80%~95%, 2.5%~10% ratio is put into the barrel of three-layer co-extruded sheet extruder, is passed through Three-layer tablet material extruder extrusion sheet, wherein host use double screw extruder or single screw extrusion machine, slave to use single screw rod Extruder, 255 DEG C~285 DEG C of host extrusion temperature, 240 DEG C~255 DEG C of slave；
4) sheet material of three roller cooling and shapings (this is routine techniques), extrusion passes through roller, is cooled down using roller, passes through three altogether A roller (pressure roller, fixed roll and setting roll), roller cooling temperature：20 DEG C~30 DEG C of pressure roller, 25 DEG C~40 DEG C of fixed roll, setting roll 25 DEG C~40 DEG C；
5) it winds；
6) GAG high barrier sheets are obtained.
For the present embodiment according to the difference of the adding proportion of MX nylon, the effect of the high obstructing performance reached is different, with The comparison of the GAG materials of the lower MX nylon for addition different proportion：
1) sheet material of 0.3mm, test condition：23 DEG C, 50%RH, MX nylon is not added, the upper and lower layer of sheet material is PETG, Middle layer is APET, oxygen barrier property 7.5cm3/m2·24hrs.atm；
2) sheet material of 0.3mm, test condition：23 DEG C, 50%RH, 5% MX Buddhist nun is blended in the APET materials of middle layer Dragon, upper, the layer PETG of sheet material, middle layer are APET+MX nylon, oxygen barrier property 3.6cm3/m2·24hrs.atm；
3) sheet material of 0.3mm, test condition：23 DEG C, 50%RH, 10% MX Buddhist nun is blended in the APET materials of middle layer Dragon, upper, the layer PETG of sheet material, middle layer are APET+MX nylon, oxygen barrier property 1.7cm3/m2·24hrs.atm；
4) sheet material of 0.3mm, test condition：23 DEG C, 50%RH, 30% MX Buddhist nun is blended in the APET materials of middle layer Dragon, upper, the layer PETG of sheet material, middle layer are APET+MX nylon, oxygen barrier property 0.75cm3/m224hrs.atm.
It is learnt by test, barrier property can be made to double when adding 5% MX nylon to APET materials, addition Barrier property can be made to improve 2.2 times or more when 10% MX nylon is to APET materials, add 30% MX nylon to APET materials When barrier property can be made to improve 5 times or more, block-water performance has substantially no effect on.But when the MX nylon of 30% or more addition to APET materials When material, the processing performance of GAG sheet materials can then change, and GAG sheet materials at this time then can not normal extrusion molding.
The foregoing is merely the better embodiments of the present invention, and the invention is not limited in the above embodiments, are implementing There may be local changes in the process, if not departing from the spirit and scope of the present invention to the various changes or modifications of the present invention, And belong within the scope of the claim and equivalent technologies of the present invention, then the present invention is also intended to include these modification and variations.

Claims (9)

1. a kind of processing method of GAG high barrier sheets, which is characterized in that the processing method includes the following steps：
(1) material preparation process includes the preparation of upper surface layer material, undersurface layer material and middle layer material, wherein
Upper surface layer material and undersurface layer material are stirred by PCTG/PETG and slipping agent, wherein the upper table The weight accounting of face layer material and the PETG/PCTG in undersurface layer material are 97%~99%, the upper surface layer The slipping agent weight accounting in material and undersurface layer material is 1%~3%；
Middle layer material is stirred in proportion by APET polyester slices and MX nylon, wherein the APET polyester slices account for The 70%~95% of middle layer weight of material ratio, the MX nylon account for the 5%~30% of middle layer weight of material ratio；
(2) three-layer co-extruded step, the volume of upper surface layer material, middle layer material and undersurface layer material is total according to accounting for respectively Volume 2.5%~10%, 80%~95%, 2.5%~10% ratio co-extrusion, wherein upper surface layer material and undersurface layer object The ratio of material is identical, and the thickness accounting of resulting sheet is respectively 2.5%~10% after co-extrusion, 80%~95%, 2.5%~ 10%；
(3) three roller cooling and shaping steps, the sheet material after cooling is three-layer co-extruded；
(4) step is wound, the GAG high barrier sheets obtained after cooling and shaping are wound.
2. a kind of processing method of GAG high barrier sheets according to claim 1, which is characterized in that the material prepares Further include drying steps in step, the drying steps include：
Mixed middle layer material is dried by dehumidifying heat pump, 140 DEG C~180 DEG C of drying temperature, drying time 4h~ 8h, dry dew point≤- 50 DEG C；
Mixed upper surface layer material, undersurface layer material are dried by dehumidifying heat pump, 60 DEG C~85 DEG C of drying temperature, Drying time 6h~10h, dry dew point≤- 50 DEG C.
3. a kind of processing method of GAG high barrier sheets according to claim 1, which is characterized in that described three-layer co-extruded Three-layer co-extruded sheet extruder, host is used to use double screw extruder or single screw extrusion machine in step, slave is using single spiral shell Bar extruder, 255 DEG C~285 DEG C of host extrusion temperature, 240 DEG C~255 DEG C of slave.
4. a kind of processing method of GAG high barrier sheets according to claim 1, which is characterized in that the three rollers cooling The cooling temperature of fixating shape step, pressure roller is 20 DEG C~30 DEG C, and the cooling temperature of fixed roll is 25 DEG C~40 DEG C, the cooling of setting roll Temperature is 25 DEG C~40 DEG C.
5. a kind of processing method of packing container, which is characterized in that the described method comprises the following steps：
(1) prepare GAG high barrier sheets, GAG high of the GAG high barrier sheets according to any one of claim 1-4 Obstruct the processing method machine-shaping of sheet material；
(2) positive/negative-pressure thermoforming；
(3) it is quickly cooled down；
(4) automatic cutting obtains packing container.
6. a kind of processing method of packing container according to claim 5, which is characterized in that the positive/negative-pressure thermoforming step Suddenly include that GAG high barrier sheets are subjected to Double-side Heating, are molded by positive and negative compression mould, wherein GAG high barrier sheets pass through red Outside line temperature control, 120 DEG C~150 DEG C of furnace temperature, heating time 1s-4s.
7. a kind of processing method of packing container according to claim 5, which is characterized in that described to be quickly cooled down step tool Body is, mold inner flow passage cooling, cooling temperature is 20 DEG C~40 DEG C, cooling time 0.5s~3s.
8. a kind of processing method of packing container according to claim 5, which is characterized in that the positive/negative-pressure thermoforming step In rapid, loxosis is formed in its hot edge seal bottom margin position.
9. a kind of processing method of packing container according to claim 5, which is characterized in that the positive/negative-pressure thermoforming step In rapid, several screens are formed in the hot edge seal bottom margin position of packing container.
CN201711390215.9A 2017-12-19 2017-12-19 A kind of processing method of GAG high barrier sheets and its packing container Pending CN108297368A (en)

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CN102873954A (en) * 2012-09-29 2013-01-16 浙江强盟实业股份有限公司 Polyester film capable of being subjected to heat seal directly and preparation method
CN103057232A (en) * 2013-01-08 2013-04-24 常州百佳薄膜科技有限公司 High-barrier PET (polyethylene terephthalate) film and making method thereof
CN104497416A (en) * 2014-12-10 2015-04-08 龚俊俊 Food packaging container and production process thereof

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CN102873954A (en) * 2012-09-29 2013-01-16 浙江强盟实业股份有限公司 Polyester film capable of being subjected to heat seal directly and preparation method
CN103057232A (en) * 2013-01-08 2013-04-24 常州百佳薄膜科技有限公司 High-barrier PET (polyethylene terephthalate) film and making method thereof
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Application publication date: 20180720