CN104387653A - High-temperature-resistant cooking and packaging film and preparation method thereof - Google Patents
High-temperature-resistant cooking and packaging film and preparation method thereof Download PDFInfo
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- CN104387653A CN104387653A CN201410667436.6A CN201410667436A CN104387653A CN 104387653 A CN104387653 A CN 104387653A CN 201410667436 A CN201410667436 A CN 201410667436A CN 104387653 A CN104387653 A CN 104387653A
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- high temperature
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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
- 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
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- 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
- C08L23/06—Polyethene
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the field of polymer materials and provides a high-temperature-resistant cooking and packaging film and a preparation method thereof. The high-temperature-resistant cooking and packaging film comprises the following components in percentage by weight: 50-60% of HDPE (High-Density Polyethylene) and 50-40% of LLDPE (Linear Low-Density Polyethylene). The preparation method comprises the following steps: weighting each component in percentage by weight, uniformly mixing the weighted components to obtain a mixture, adding the obtained mixture into a double-layer co-extrusion film-blowing machine, and performing film blowing to obtain the high-temperature-resistant cooking and packaging film. The high-temperature-resistant cooking and packaging film has good high temperature resistance and excellent heat sealability and processing property and can be cooked for 70 minutes at a high temperature of 125-130 DEG C, so that sterilization is achieved, furthermore the phenomenon of damage of the packaging film is effectively avoided and the packaging film, together with the liquid packaged inside the packaging film, is convenient to cook; in addition, the preparation method is simple in operation and low in cost and is very suitable for industrial production.
Description
Technical field
The invention belongs to technical field of polymer materials, particularly relate to a kind of high temperature resistance boiling packing film and preparation method thereof.
Background technology
The good chemical stability that polyethylene (PE) has, water tolerance and scraping and wiping resistance performance, thus one of packing film material be widely used, PE film range of application is wider, may be used for wrap food, Chemicals, apparatus etc., the usage space of performance on wrapping material of PE film has larger impact, if the poor-performing of PE film, in use easily there is the phenomenons such as damaged, wherein, resistance to elevated temperatures is also investigate an important indicator of PE film performance, if resistance to elevated temperatures is poor, the high-temperature resistant result of packaging can be reduced, affect the use of product.
At present, based on PE, the coextrusion film blowing material of carrier is widely used in packaging material for food, medical packaging material, flexible pipe sheet material, cosmetics of everyday use wrapping material, the fields such as industrial film, generally available starting material have high density polyethylene(HDPE) (HDPE), medium-density polyethylene (MDPE), Low Density Polyethylene (LDPE), linear low density polyethylene (LLDPE), the base material that common packing film is used for packed liq adopts polyethylene material mostly, the effect of surfactant package and protection can be met, but, when this base material carries out high temperature steaming sterilizing together with liquid, the easy phenomenon occurring breakage.
Summary of the invention
The object of the invention is to overcome above-mentioned the deficiencies in the prior art, a kind of high temperature resistance boiling packing film and preparation method thereof is provided, being intended to solve existing packing film when carrying out high temperature steaming sterilizing, easily occur damaged problem.
The present invention is achieved in that on the one hand, provides a kind of high temperature resistance boiling packing film, comprises the component of following weight percent:
HDPE 50-60％
LLDPE 50-40％。
Particularly, the thickness of described high temperature resistance boiling packing film is 0.05-0.3mm.
Particularly, the density of described high temperature resistance boiling packing film is 0.933-0.953g/cm
3.
Particularly, the density of described HDPE is 0.945 ~ 0.96g/cm
3, fusing point 125 ~ 137 DEG C.
Particularly, the density of described LLDPE is 0.925g/cm
3, fusing point 120 ~ 125 DEG C.
On the other hand, provide a kind of high temperature resistance boiling packing film preparation method, comprise the steps:
(1) recipe ingredient is taken
Described HDPE, LLDPE is taken respectively according to above-mentioned high temperature resistance boiling packing film formula;
(2) mixture is prepared
Described HDPE, LLDPE of taking in step (1) are dropped into stirrer be uniformly mixed, obtain mixture;
(3) high temperature resistance boiling packing film is prepared
The mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine coextrusion film blowing, and under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Particularly, in step (2), the time that described stirrer is uniformly mixed is 10-20min.
The invention has the beneficial effects as follows: high temperature resistance boiling packing film of the present invention, adopt HDPE50-60%, LLDPE50-40% is as raw material, through mixing, coextrusion film blowing obtains, this high temperature resistance boiling packing film has good high temperature resistance cooking effect, 70min can be reached by cooking time under high temperature 125-130 DEG C condition, like this, while reaching sterilization, effectively avoid the phenomenon occurring packing film breakage, the convenient liquid boiling together with packing in it, simultaneously, this high temperature resistance packing film also has excellent heat sealability and processing characteristics, in addition, this preparation method, simple to operate, with low cost, be very suitable for suitability for industrialized production.
Accompanying drawing explanation
In order to be illustrated more clearly in technical scheme of the present invention, be briefly described to the accompanying drawing used required in embodiment below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the high temperature resistance boiling packing film preparation method schematic flow sheet that the embodiment of the present invention provides.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
Embodiments provide a kind of high temperature resistance boiling packing film, comprise the component of following weight percent:
HDPE 50-60％
LLDPE 50-40％。
Particularly, the thickness of high temperature resistance boiling packing film is 0.05-0.3mm, and as preferred embodiment, the thickness of high temperature resistance boiling packing film is 0.05-0.2mm, and now, this thickness is that the high temperature resistance boiling packing film of 0.05-0.2mm is mainly used in food packaging applications.Herein, as other embodiment, the thickness of high temperature resistance boiling packing film is 0.2-0.3mm, and this thickness is that the high temperature resistance boiling packing film of 0.2-0.3mm is mainly used in industrial packaging field.
Particularly, the density of high temperature resistance boiling packing film is 0.933-0.95g/cm
3, as preferred embodiment, the density of this high temperature resistance boiling packing film is 0.943g/cm
3.
Particularly, the density of HDPE is 0.945 ~ 0.96g/cm
3, fusing point 125 ~ 137 DEG C, this HDPE is white particle that is nontoxic, tasteless, odorless, its have good thermotolerance and winter hardiness, chemical stability good, also there is higher rigidity and toughness, physical strength is good.In a particular embodiment, the mass percentage of this HDPE can be the concrete component such as 50%, 51%, 52%, 53%, 54%, 55%, 56%, 57%, 58%, 59%, 60%.
Particularly, the density of LLDPE is 0.925g/cm
3, fusing point 120 ~ 125 DEG C, this LLDPE is that ethene and a small amount of high alpha-olefin are (as butene-1, hexene-1, octene-1, tetramethyl-amylene-1 etc.) under catalyst action, through a kind of multipolymer of high pressure or low-pressure polymerization, LLDPE product is nontoxic, tasteless, odorless, be creamy white particle, it is high that it has intensity, good toughness, rigidity is strong, heat-resisting, the advantage such as cold-resistant, also there is good resisting environmental stress and cracking, the performances such as tear-resistant intensity, and can be acidproof, alkali, organic solvent etc., in a particular embodiment, the mass percentage of this LLDPE can be 40%, 41%, 42%, 43%, 44%, 45%, 46%, 47%, 48%, 49%, concrete component such as 50% grade.
High temperature resistance boiling packing film of the present invention, adopt HDPE50-60%, LLDPE50-40% as raw material, obtain through mixing, coextrusion film blowing, this high temperature resistance boiling packing film has good high temperature resistance cooking effect, 70min can be reached by cooking time under high temperature 125-130 DEG C condition, like this, while reaching sterilization, effectively avoid the phenomenon occurring packing film breakage, the convenient liquid boiling together with packing in it, this preparation method, simple to operate, with low cost, be very suitable for suitability for industrialized production.
In addition, polyethylene has excellent tensile property, heat sealability and flexibility, is carried out by HDPE and LLDPE bi-material mixing, co-extrusion processing, and prepare simultaneously containing the coextrusion film blowing material of HDPE and LLDPE, it has excellent heat sealability and processing characteristics.
Correspondingly, embodiments provide a kind of high temperature resistance boiling packing film preparation method, comprise the steps:
S01 takes recipe ingredient
Described HDPE, LLDPE is taken respectively according to above-mentioned high temperature resistance boiling packing film formula;
S02 prepares mixture
HDPE, LLDPE of taking in step S01 are dropped into stirrer be uniformly mixed, obtain mixture;
S03 prepares high temperature resistance boiling packing film
The mixture obtained in step S02 is put into double-layer coextrusion inflation film manufacturing machine coextrusion film blowing, under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Particularly, in above-mentioned steps S01 high temperature resistance boiling packing film formula and formula in each component preferred content and kind as described above, in order to save length, do not repeat them here.
Particularly, in step S02, the time that above-mentioned stirrer is uniformly mixed is 10-20min.
Particularly, each component only need to be dropped into stirrer by formula and carry out stirring after mixing and put into double-layer coextrusion inflation film manufacturing machine by above-mentioned high temperature resistance boiling packing film preparation method, under suitable blown film temperature condition, blown film obtains high temperature resistance boiling packing film, like this, in preparation process, only need control the churning time of stirrer and the blown film temperature of double-layer coextrusion inflation film manufacturing machine, therefore, its preparation method technique is simple, and condition is easily controlled, with low cost, feature low for equipment requirements, is suitable for suitability for industrialized production.
Particularly, above-mentioned double-layer coextrusion inflation film manufacturing machine blown film preparation process is as follows: add in hopper by the mixture of LDPE and LLDPE, screw rod is entered from hopper, after raw material contacts with screw thread slant edge, the slant edge rotated is by raw particles forward, and in passing process, through extruding, friction generates heat and indirect heating and progressively dissolving, raw material after melting is extruded from die head die orifice, and through inflation, vane cooling, hitch frame draws high, take off roll, be wound into film cylinder material through rolling frame again.
Below in conjunction with specific embodiment, the present invention is explained in detail:
Embodiment 1
The high temperature resistance boiling packing film of this embodiment, by weight percentage, composed of the following components:
HDPE50％、LLDPE50％。
Its preparation method is as follows:
(1) each component is taken by above-mentioned weight percent;
(2) HDPE, LLDPE of taking in step (1) are dropped into stirrer to carry out being uniformly mixed 10-20min, obtain mixture;
(3) mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine, under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Embodiment 2
The high temperature resistance boiling packing film of this embodiment, by weight percentage, composed of the following components:
HDPE53％、LLDPE47％；
Its preparation method is as follows:
(1) each component is taken by above-mentioned weight percent;
(2) HDPE, LLDPE of taking in step (1) are dropped into stirrer to carry out being uniformly mixed 10-20min, obtain mixture;
(3) mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine, under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Embodiment 3
The high temperature resistance boiling packing film of this embodiment, by weight percentage, composed of the following components:
HDPE55％、LLDPE45％；
Its preparation method is as follows:
(1) each component is taken by above-mentioned weight percent;
(2) HDPE, LLDPE of taking in step (1) are dropped into stirrer to carry out being uniformly mixed 10-20min, obtain mixture;
(3) mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine, under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Embodiment 4
The high temperature resistance boiling packing film of this embodiment, by weight percentage, composed of the following components:
HDPE57％、LLDPE43％；
Its preparation method is as follows:
(1) each component is taken by above-mentioned weight percent;
(2) HDPE, LLDPE of taking in step (1) are dropped into stirrer to carry out being uniformly mixed 10-20min, obtain mixture;
(3) mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine, under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Embodiment 5
The high temperature resistance boiling packing film of this embodiment, by weight percentage, composed of the following components:
HDPE58％、LLDPE42％；
Its preparation method is as follows:
(1) each component is taken by above-mentioned weight percent;
(2) HDPE, LLDPE of taking in step (1) are dropped into stirrer to carry out being uniformly mixed 10-20min, obtain mixture;
(3) mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine, under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Embodiment 6
The high temperature resistance boiling packing film of this embodiment, by weight percentage, composed of the following components:
HDPE60％、LLDPE40％；
Its preparation method is as follows:
(1) each component is taken by above-mentioned weight percent;
(2) HDPE, LLDPE of taking in step (1) are dropped into stirrer to carry out being uniformly mixed 10-20min, obtain mixture;
(3) mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine, under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
Embodiment 1-6 formula and performance test data as shown in table 1.
| Composition | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Embodiment 5 | Embodiment 6 |
| HDPE(％) | 50 | 53 | 55 | 57 | 58 | 60 |
| LLDPE(％) | 50 | 47 | 45 | 43 | 42 | 40 |
| Boiling temperature (DEG C) | 125 | 126 | 127 | 128 | 129 | 130 |
| Cooking time (min) | 70 | 70 | 70 | 70 | 70 | 70 |
Table 1
As shown in Table 1, high temperature resistance boiling packing film prepared by embodiment 1-6 adopts HDPE50-60%, LLDPE50-40% as raw material, obtain through mixing, coextrusion film blowing, this high temperature resistance boiling packing film has good resistance to elevated temperatures, can boiling 70min under the condition of high temperature 125-130 DEG C, and do not produce damaged phenomenon, like this, while reaching sterilization, effectively avoid the phenomenon occurring packing film breakage, the convenient liquid boiling together with packing in it, this preparation method, simple to operate, with low cost, be very suitable for suitability for industrialized production.
In addition, PE has excellent tensile property, heat sealability and flexibility, is therefore carried out by HDPE and LLDPE bi-material mixing, co-extrusion processing, and prepare simultaneously containing the coextrusion film blowing material of HDPE and LLDPE, it has excellent heat sealability and processing characteristics.
The above is the preferred embodiment of the present invention; 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 make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (7)
1. a high temperature resistance boiling packing film, is characterized in that, comprises the component of following weight percent:
HDPE 50-60％
LLDPE 50-40％。
2. high temperature resistance boiling packing film as claimed in claim 1, it is characterized in that, the thickness of described high temperature resistance boiling packing film is 0.05-0.3mm.
3. high temperature resistance boiling packing film as claimed in claim 1, it is characterized in that, the density of described high temperature resistance boiling packing film is 0.933-0.953g/cm
3.
4. high temperature resistance boiling packing film as claimed in claim 1, it is characterized in that, the density of described HDPE is 0.945 ~ 0.96g/cm
3, fusing point is 125 ~ 137 DEG C.
5. high temperature resistance boiling packing film as claimed in claim 1, it is characterized in that, the density of described LLDPE is 0.925g/cm
3, fusing point is 120 ~ 125 DEG C.
6. the high temperature resistance boiling packing film preparation method as described in any one of claim 1-5, is characterized in that, comprise the steps:
(1) recipe ingredient is taken
Described HDPE, LLDPE is taken respectively according to high temperature resistance boiling packing film formula according to claim 1;
(2) mixture is prepared
Described HDPE, LLDPE of taking in step (1) are dropped into stirrer be uniformly mixed, obtain mixture;
(3) high temperature resistance boiling packing film is prepared
The mixture obtained in step (2) is put into double-layer coextrusion inflation film manufacturing machine coextrusion film blowing, and under 145-175 DEG C of blown film temperature condition, blown film obtains high temperature resistance boiling packing film.
7. high temperature resistance boiling packing film preparation method as claimed in claim 6, it is characterized in that, in step (2), the time that described stirrer is uniformly mixed is 10-20min.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410667436.6A CN104387653A (en) | 2014-11-20 | 2014-11-20 | High-temperature-resistant cooking and packaging film and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410667436.6A CN104387653A (en) | 2014-11-20 | 2014-11-20 | High-temperature-resistant cooking and packaging film and preparation method thereof |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105109074A (en) * | 2015-08-25 | 2015-12-02 | 桐城市福润包装材料有限公司 | Technology for preparing double-layer PE packaging film |
| CN105172299A (en) * | 2015-09-24 | 2015-12-23 | 李富贵 | Cooling film and manufacturing method thereof |
| CN105482142A (en) * | 2015-11-24 | 2016-04-13 | 安徽美翔塑业有限公司 | Preparation process for durable antistatic PE packaging film |
| CN111483195A (en) * | 2020-04-09 | 2020-08-04 | 广州新文塑料有限公司 | Three-layer co-extrusion packaging film and preparation method thereof |
| CN114274636A (en) * | 2021-12-31 | 2022-04-05 | 青岛东海包装产业有限公司 | High-heat-resistance high-low-temperature-toughness plastic film and preparation method thereof |
| CN114379157A (en) * | 2022-01-19 | 2022-04-22 | 广州市瑞高包装工业有限公司 | Composite hose used for food packaging and capable of being cooked at high temperature |
| CN116198183A (en) * | 2023-01-12 | 2023-06-02 | 广州市瑞高包装工业有限公司 | Composite hose with high-temperature-resistant steaming performance and preparation method thereof |
| CN116285061A (en) * | 2023-02-28 | 2023-06-23 | 上海云开塑胶制品有限公司 | High-flatness ultra-thin low-pressure film |
-
2014
- 2014-11-20 CN CN201410667436.6A patent/CN104387653A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105109074A (en) * | 2015-08-25 | 2015-12-02 | 桐城市福润包装材料有限公司 | Technology for preparing double-layer PE packaging film |
| CN105172299A (en) * | 2015-09-24 | 2015-12-23 | 李富贵 | Cooling film and manufacturing method thereof |
| CN105482142A (en) * | 2015-11-24 | 2016-04-13 | 安徽美翔塑业有限公司 | Preparation process for durable antistatic PE packaging film |
| CN111483195A (en) * | 2020-04-09 | 2020-08-04 | 广州新文塑料有限公司 | Three-layer co-extrusion packaging film and preparation method thereof |
| CN111483195B (en) * | 2020-04-09 | 2022-11-04 | 广州新文塑料有限公司 | Three-layer co-extrusion packaging film and preparation method thereof |
| CN114274636A (en) * | 2021-12-31 | 2022-04-05 | 青岛东海包装产业有限公司 | High-heat-resistance high-low-temperature-toughness plastic film and preparation method thereof |
| CN114274636B (en) * | 2021-12-31 | 2023-09-19 | 青岛东海包装产业有限公司 | High-heat-resistance high-low-temperature toughness plastic film and preparation method thereof |
| CN114379157A (en) * | 2022-01-19 | 2022-04-22 | 广州市瑞高包装工业有限公司 | Composite hose used for food packaging and capable of being cooked at high temperature |
| CN116198183A (en) * | 2023-01-12 | 2023-06-02 | 广州市瑞高包装工业有限公司 | Composite hose with high-temperature-resistant steaming performance and preparation method thereof |
| CN116285061A (en) * | 2023-02-28 | 2023-06-23 | 上海云开塑胶制品有限公司 | High-flatness ultra-thin low-pressure film |
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