CN105755674B - A kind of food storage bag and preparation method thereof - Google Patents

A kind of food storage bag and preparation method thereof Download PDF

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Publication number
CN105755674B
CN105755674B CN201610146638.5A CN201610146638A CN105755674B CN 105755674 B CN105755674 B CN 105755674B CN 201610146638 A CN201610146638 A CN 201610146638A CN 105755674 B CN105755674 B CN 105755674B
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woven
polylactic acid
pla
food storage
storage bag
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CN105755674A (en
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钱程
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SUZHOU KINGCHARM NEW MATERIALS Corp.
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Jiaxing University
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    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
    • D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
    • D04H1/542—Adhesive fibres
    • D04H1/55—Polyesters
    • 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
    • B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • 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
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
    • B32B5/028—Net structure, e.g. spaced apart filaments bonded at the crossing points
    • 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
    • B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
    • B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
    • B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
    • B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D29/00—Sacks or like containers made of fabrics; Flexible containers of open-work, e.g. net-like construction
    • B65D29/02—Sacks with laminated or multiple walls
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/08—Melt spinning methods
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
    • D03D13/008—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft characterised by weave density or surface weight
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
    • D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
    • D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
    • D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
    • D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
    • 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
    • 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
    • B32B2250/20—All layers being fibrous or filamentary
    • 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
    • B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
    • B32B2262/06—Vegetal fibres
    • B32B2262/062—Cellulose fibres, e.g. cotton
    • B32B2262/065—Lignocellulosic fibres, e.g. jute, sisal, hemp, flax, bamboo
    • 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
    • B32B2305/00—Condition, form or state of the layers or laminate
    • B32B2305/38—Meshes, lattices or nets
    • 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
    • B32B2307/51—Elastic
    • 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • B32B2307/7145—Rot proof, resistant to bacteria, mildew, mould, fungi
    • 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
    • B32B2307/728—Hydrophilic
    • 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
    • B32B2307/754—Self-cleaning
    • 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
    • D—TEXTILES; PAPER
    • D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
    • D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
    • D10B2201/01—Natural vegetable fibres
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
    • Y02A40/90—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in food processing or handling, e.g. food conservation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W90/00—Enabling technologies or technologies with a potential or indirect contribution to greenhouse gas [GHG] emissions mitigation
    • Y02W90/10—Bio-packaging, e.g. packing containers made from renewable resources or bio-plastics

Abstract

The invention discloses a kind of food storage bag and preparation method thereof, it is related to packaging field.The food storage bag is made up of acid fiber by polylactic and tossa.The preparation method of food storage bag includes：Lower floor's PLA filament web is prepared using polylactic acid slice；The woven woven roving of flaxen fiber is unreeled, is directly laid on lower floor's PLA filament web；Upper strata PLA filament web is prepared using polylactic acid slice and is laid in three layers of fibre web of formation on the woven woven roving of flaxen fiber；Three layers of fibre web are subjected to pre-reinforcement and obtain Polylactic acid filament yarn non-woven；Polylactic acid filament yarn non-woven carried out by ultrasonic method compound, turn into food storage bag after cutting into certain specification, then by sewing and heat-sealing.Food storage bag provided by the invention, it is compound that point-like is carried out by using degradable acid fiber by polylactic and with unique fiber holes cavity configuration tossa and ultrasonic wave mode, make food storage bag that there is the deterioration of delay grain quality, extend the foodstuff preservation phase, the advantages of damaging of being collided with during buffering foodstuff transportation.

Description

A kind of food storage bag and preparation method thereof
Technical field
The present invention relates to packaging field, more particularly to a kind of food storage bag and preparation method thereof.
Background technology
As the food-safe problem of people is increasingly paid close attention to, inner wrapping grain is increasingly subject to favor, due to convenient in carrying, The edible phase is short, and 5KG-30KG loadings food is very popular in market.At present, China's grain package bag be mainly Polywoven Bag and Compound plastic bag, also there is a small amount of nonwoven fabrics package bag, wherein Polywoven Bag intensity is high, and impact resistance is good, anti-skidding without mutability Shape, but the poor-performing in terms of insect prevention, protection against the tide, the shortcomings of environmental pollution [prospects point of the Xue Zhi into grain marketing packing bags be present Analysis [J] grain circulation technologies, 2002, (3):36-36.]；Compound plastic bag is by Trend of High Obstructive Materials Ordnance Engineering College EVOH, PET, PA It is compound with the laminated plastics such as PE, PP, mould proof, insect prevention on grain packaging, problem of guaranteeing the quality have been substantially solved, but in environmental problem day Today that benefit is concerned, plastic products are toxic and contaminative to environment hinders it further to develop [Hu Zhipeng, Yang Yan China's grain packaging present situation and development trend [J] Chinese packagings, 2004,24 (1):51-52.], and existing non-woven fabrics is packed Bag, because bearing capacity is limited, is only used for 5KG and the grain packaging of following weight using polypropylene spun-bonded non-woven fabrics In.Therefore, safety and sanitation, good protectiveness, environmentally safe, good, the economic convenient packaging bag of strength are grain packagings The developing direction of material.
The existing data for being related to grain package bag has：
Patent CN201210465623.7 discloses a kind of preparation method of grain sterilizing bag, including：1）First will be inorganic Nano-calcium carbonate removes moisture removal in 120-140 DEG C of preheating and drying 1-2 hour；By inorganic nano calcium carbonate, titanate coupling agent, Absolute ethyl alcohol in mass ratio 1: 3: 25 is sufficiently stirred scattered, handles vacuum drying after 35-45 minutes and removes solvent and is made organic and changes Property nano-calcium carbonate；2）Copper sulphate and silane coupler are pressed 1 first：1 is mixed, 120-140 DEG C of drying is modified place Reason；3）The dispensing such as Corvic, polyvinyl resin and other additives in proportion, using high-speed mixer by above-mentioned material It is sufficiently mixed uniformly, is granulated on the twin screw extruder at a temperature of 135-145 DEG C, then existed using Single screw extrusion blow moulding machine Grain sterilizing bag is blow molded at 180-190 DEG C；Patent CN201210565159.9 discloses a kind of SEBS nanosized SiO_2s and not given birth to The preparation method of worm PE food storage bags, including：（1）, make nano silica particle：1.6-2.0% miniature SiO2 particles are dissolved in into liquid In body carrier, formation suspended state is standby under electrode effect；（2）By 120 parts of SEBS resins, 130 parts of rubber filling oil, poly- third Olefine resin 120-150 parts, lubricant 0.9-1.5 parts, antiaging agent 0.7-1 parts, nano silica particle 1.5-2.5 parts are standby； （3）, SEBS resins fully absorb to rubber filling oil, then with material and the nanometer such as acrylic resin, lubricant, antiaging agent SiO2 particles are uniform in stirrer for mixing together, are granulated with double screw extruder；（4）, in special plastic extrusion inflation film manufacturing machine Middle extrusion molding film, then by techniques such as arrangement, printing, sealing bags, form the insect-free PE food storage bags of SEBS nanosized SiO_2s.On State two patents and a variety of chemical assistants are with the addition of during antibiotic plastic packaging bag is prepared, security can be caused hidden grain Suffer from.
Patent CN201110337436.6 discloses a kind of preparation method for hindering oxygen composite bed grain package bag, employs multilayer Structure：Ageing resistance polypropylene material be protective layer, polypropylene/ethylene-vinylacetate/polyethylene or polypropylene/vinylidene chloride/ Three layers of compound oxygen barrier film oxygen barrier layer that polyethylene is formed, by nonwoven techniques foil layer and moisture absorption layer two layers of fibre web is made respectively, It is integrated through acupuncture is laminated, and the not hydrophilic ES webs through non-woven shaping is overlapped on moisture absorption layer, is made through acupuncture again Composite lock water layer is obtained, grain is made through the compound obtained bag body material of heat, then through cut-parts, suture and hot-pressing, edge-sealing in this sandwich construction Eat packaging bag.On the one hand the patent employs the plastic products oxygen barrier layers such as polypropylene/ethylene-vinylacetate/vinylidene chloride, separately One side bag body material at least trilaminate material will be combined with each other, and well prepared in advance per layer of material, then enter offline again Compound, the complex technical process of row, long flow path, production cost are high.
Patent CN201320128115.X discloses a kind of grain package bag, including internal layer, intermediate layer and outer layer, the internal layer It is layers of kraft paper with outer layer, the intermediate layer is antibacterial oxidant layer, and the antibacterial oxidant layer is natamycin powder.Natamycin powder Coating weight be 2-10mg/m2.The internal layer is provided with strip absorption bag.The material of the strip absorption is non-woven fabrics, wherein Equipped with bamboo charcoal or drier.The patent uses double-deck paper bag inter-coat anti-bacterial powder, the easy moisture absorption of one side paper bag and influence The strength of packaging bag, expansion is produced after the wood pulp cellulose moisture absorption in another aspect paper bag, grain can be made to be produced in respiratory Oxygen be difficult to discharge, so as to will reduce grain fresh-keeping effect.
In summary, in the existing data related to grain package bag, composite membrane, film modeling on the one hand more be relate to again Close, film it is non-woven fabric compounded etc., due to a large amount of potential poison for having used nondegradable petroleum-based plastics film, wherein additive volatilization Property can cause safety risks, on the other hand with MULTILAYER COMPOSITE or add a large amount of chemical assistants, manufacturing process is complicated, it is difficult in city Sell and promote on field.Therefore, in order to allow consumers in general to be able to eat safe and healthy, fresh grain, the invention provides A kind of natural bacteriostatic PLA non-woven fabrics food storage bag and preparation method thereof.
The content of the invention
In view of the above-mentioned problems existing in the prior art, the invention provides a kind of food storage bag and preparation method thereof.
First aspect according to embodiments of the present invention, there is provided a kind of preparation method of food storage bag, methods described include：
1）Lower floor's PLA filament web is prepared using polylactic acid slice；
2）The woven woven roving of flaxen fiber is unreeled, is directly laid on lower floor's PLA filament web, the fiber crops are fine Woven woven roving is tieed up to be prepared by tossa；
3）Upper strata PLA filament web is prepared using polylactic acid slice；
4）The upper strata PLA filament web is laid on the woven woven roving of the flaxen fiber, and by the upper strata Three layers of fibre web of lactic acid filament web, the woven woven roving of the flaxen fiber and lower floor's PLA filament web composition are integrally sent Enter and pre-reinforcement is carried out in three-high mill, wherein the roller surface temperature of the three-high mill is 125-138 DEG C, the hot rolling hot light time For 10-20s, go out three layers of fibre web after the three-high mill by winding, obtain Polylactic acid filament yarn non-woven；
5）It is sent into after the Polylactic acid filament yarn non-woven is unreeled in ultrasonic wave compounding machine, wherein, ultrasonic bonds point One kind being shaped as in circular, ellipse and rhombus, by controlling the size of the ultrasonic bonds point to grow the PLA Without bounding point area when silk is non-woven fabric compounded：There is bounding point area=4-6:1, compound speed is 4-8m/min, the PLA length It is 260- that silk non-woven fabrics, which goes out after the ultrasonic wave compounding machine by being wound into for compound nonwoven cloth, the compound nonwoven cloth grammes per square metre, 410g/m2, without bounding point area thickness it is 1-2.5mm in the compound nonwoven cloth；
6）The compound nonwoven cloth is unreeled, width × length is cut into according to the requirement for containing 5-30KG weight grains respectively The sheet compound nonwoven cloth for 900-1800mm × 320-580mm is spent, by the sheet compound nonwoven cloth doubling along its length, The sheet compound nonwoven cloth after doubling is coincided with the upper and lower, is then sutured along its length, the last edge along suture Apply hot-pressing, edge-sealing, obtain food storage bag.
As a further improvement on the present invention, the preparation that lower floor's PLA filament web is prepared using polylactic acid slice Method, including：
It is 30-55g/10min, density 1.24g/cm by melt index3, fusing point is 165-170 DEG C of polylactic acid slice The pre-crystallized 4-6h first under the conditions of 30-40 DEG C, 110 DEG C then are warming up to 10 DEG C of the condition of heating up per hour, then at 110 DEG C Under the conditions of dry 6-8h, the polylactic acid slice water content is reached 0.035-0.045%；
Enter manifold is sent into after the polylactic acid slice of drying and processing is extruded and filtered via feeding, extruder Row spinning, spinning temperature control is at 220-240 DEG C, and spinning speed control is 4000-6000m/min, and compressed air pressure is 0.3-0.5MPa, cross air blasting chilling temperature are 20-23 DEG C, and wind speed be 0.4-0.8 m/s, and air-flow stretches during tubular type air drawing Work air quantity is 0.75-1m3/ min, pendulum wire device sub-wire frequency is 500-700Hz, by into aspirating bellows under lace curtaining after sub-wire Air-flow is aspirated and fallen on lace curtaining, and the speed of suction airstream is 3-8m/s, and it is 0.8-1.2dtex to obtain monofilament linear density, gram Weight is 30-60g/m2Lower floor's PLA filament web.
As a further improvement on the present invention, the preparation that upper strata PLA filament web is prepared using polylactic acid slice Method, including：
Melt index is used as 24-50g/10min, density 1.24g/cm3, fusing point is that 165-170 DEG C of PLA is cut Piece pre-crystallized 4-6h first under the conditions of 30-40 DEG C, 110 DEG C then are warming up to 10 DEG C of the condition of heating up per hour, then 110 6-8h is dried under the conditions of DEG C, the water content of the polylactic acid slice is reached 0.035-0.045%；
Enter manifold is sent into after the polylactic acid slice of drying and processing is extruded and filtered via feeding, extruder Row spinning, spinning temperature control is at 200-220 DEG C, and spinning speed control is 3500-5000m/min, and compressed air pressure is 0.2-0.4MPa, cross air blasting chilling temperature are 18-22 DEG C, and wind speed be 0.4-0.8 m/s, and air-flow stretches during tubular type air drawing Boiler pressure control work in 0.8-1m3/ min, pendulum wire device sub-wire frequency is 600-900Hz, by into suction air under lace curtaining after sub-wire The air-flow suction of case and fall on lace curtaining, the speed of suction airstream is 10-15m/s, and it is 1.5- to form monofilament linear density 3.0dtex, grammes per square metre 80-100g/m2Upper strata PLA filament web.
As a further improvement on the present invention, the preparation technology of the woven woven roving of the flaxen fiber includes：
1）From the tossa by softening heap storage processing, technique number for 300-350 branch, by two hecklers After sequence, three mixing in doubling step, then it is 550-650tex to machine by spun yarn and number is made, and the twist is 28-35 sth. made by twisting/10cm's Warp thread；
2）From the tossa by softening heap storage processing, technique number for 200-250 branch, by two hecklers After sequence, two mixing in doubling step, then it is 750-880tex to machine by spun yarn and number is made, and the twist is 17-22 sth. made by twisting/10cm's Weft yarn；
3）Weaved using plain weave construction, it is 150-250g/m to obtain weight2Flaxen fiber fabric；
4）Use it is upper and lower for paper calender roll cylinder, centre for steam roller tube three-roller calendar to the flaxen fiber fabric Press polish is carried out, obtains the woven woven roving of flaxen fiber, the surface temperature of the three-roller calendar is 80-110 DEG C during press polish, and pressure is 85-120KG/cm, warp-stretch rate is between 1.5-3% during press polish, and Weft Shrinkage is between 0.7-1.2%, the steam roller tube Superficial velocity be 33-45m/min.
As a further improvement on the present invention, the three-high mill is that centre is cotton roller, under top is polishing roll, bottom is The non-woven fabrics milling train of smooth roll, the cotton roller do not heat, and the polishing roll and lower smooth roll are heating roller, and three layers of fibre web exists During hot rolling, the upper strata PLA filament web is plated by the lower smooth roll plasticizing, after cotton roller upset, the lower strata Lactic acid filament web is plastified by the polishing roll and plated, so as to obtain two-sided plasticizing hot light, the PLA of green tack together Continuous yarn non-woven fabrics.
Second aspect according to embodiments of the present invention, there is provided a kind of food storage bag, the food storage bag is by any of the above-described described The preparation method of food storage bag is prepared, and the food storage bag is made up of acid fiber by polylactic and tossa.
Compared with prior art, the preparation method of food storage bag provided by the invention and preparation method thereof has advantages below：
1) natural bacteriostatic, mildew resistance：The present invention uses material of main part of the acid fiber by polylactic as food storage bag, and poly- newborn Sour fiber be the lactic acid produced using non-grain crop by modern biotechnology as raw material, then by special polymerisation and spinning Silk process is made, and is a kind of material of fully biodegradable.Because the structures alone of PLA is lactic acid, into fibre after its fiber Surface unusual light, fiber are in faintly acid, are approached with the pH value of human body skin, have natural biocidal property；The present invention also uses Tossa is as framework material, and corchorin its unique fiber holes cavity configuration, makes it rich in oxygen and antibiotic property fiber crops chisel alcohol Deng benefit materials, anaerobic bacteria is caused not survive, therefore the food storage bag using PLA and tossa as material has natural suppression Bacterium property, inhibitory action is played to the fungus growth in grain and moth breeding, and then the Storing quality of grain can be improved, extended Storage period.
2) good moisture absorption, wet putting：The strength and extension property of acid fiber by polylactic is close with polyester fiber, and regain is only 0.2-0.4%, belong to a kind of non-hygroscopic fiber, therefore the inside and outside face of the present invention（Upper and lower layer）Employ nonhygroscopic PLA Fiber, the effect of protection against the tide can be played；On the other hand, acid fiber by polylactic cloth has extraordinary wet guilding [Kong Lingzhi business Several INGEOTM acid fiber by polylactic [J] fabrics for industrial use of metaplasia production, 2009,27 (1):26-28.], and tossa is not But containing more hydrophilic cellulose, hemicellulose and colloid, but also there is irregular polygonal pooled cross data, by This can produce excellent capillary effect, have quick moisture adsorption and releasing and moisture-inhibiting ability, therefore produced by grain physiologic respiration Moisture through internal layer acid fiber by polylactic lead it is wet after, absorbed rapidly by tossa, and outside is transmitted to through outer layer acid fiber by polylactic In environment, and then improve the food storage bag speed that the wet steam of heat caused by grain is propagated from inside to outside in storage and transportation Degree, the minimum respiratory intensity of grain is kept, maintain the physiologically active of grain, the fresh of grain will be kept to a certain extent Degree, nutritional ingredient and vitality.
3) it is high using strength：The present invention using the woven woven roving of thick denier flaxen fiber be used as among skeleton, make product strength >= 150N, fully meet the requirement of standard GB/T/T 24905-2010 grain packagings-wheat flour bag.In addition, in technical scheme It is upper and lower（Inner and outer surfaces）Strata lactic acid filament web makes with the woven woven roving compound tense of flaxen fiber, the first two-sided hot light of use Three layers of green tack together, and make the acid fiber by polylactic on upper and lower surface reach plastifying state（Between film and non-woven fabrics）, On the one hand the outer surface of plasticizing plays preferably moistureproof and buffer action to external environment, and on the other hand the inner surface of plasticizing has Smooth inwall, suede phenomenon will not be also produced in the friction process with grain；On this basis, then using ultrasonic wave carry out Point-like is compound, and a little upper and lower layer and middle casing play are linked together by rolling, and the place without rolling a little can be in upper and lower layer Thin layer of air be present between the woven woven roving of flaxen fiber, this thin layer of air plays slow in food storage bag transport and handling process Rush the effect of layer, add to packaging grain collide with and protectiveness that eminence is fallen.
4) environmentally friendly, nontoxic pollution-free：Under the conditions of normal epidemic disaster, acid fiber by polylactic and products thereof is a kind of The material of stable physical property, its discarded object are just degraded to carbon dioxide and water in soil or seawater through microbial action, this Outside, PLA and flaxen fiber all have preferable uvioresistant characteristic, therefore have preferable durability during normal use, It is able to can also be washed with use repeatly.On the other hand, fiber crops are a kind of natural plant fibres, and PLA is that one kind is derived from The fiber of natural plants, two kinds of fibers can be degradable after with old discarding, then makees through photosynthesis of plant, again generation Thing, infinitely reciprocally enter in nature systemic circulation, therefore food storage bag prepared by the present invention is safe and healthy, nontoxic pollution-free, category In environmentally friendly machine.
In summary, the present invention passes through the selection of acid fiber by polylactic and flaxen fiber, upper strata PLA filament web, lower strata The preparation of lactic acid filament web and the woven woven roving of flaxen fiber, online and the offline combination process of ultrasonic wave selection, are prepared A kind of food storage bag, the food storage bag has natural bacteriostatic mildew resistance, a Moisture absorption ＆ moisture conductivity, does not fall that suede, strength high-durability are good, can weigh Again using it is washable the characteristics of, to colliding with and eminence is fallen and has cushioning effect in transportation, and can be degradable, safe nothing It is malicious, environmentally safe, thus can preferably delay grain quality deterioration speed, and then the foodstuff preservation phase can be extended, had Good market application foreground.
Embodiment
With reference to specific embodiment（But it is not limited to illustrated embodiment) the invention will be further described, wherein in invention The raw material sources being related to：Fibre-grade polylactic acid slice, purchased from Maanshan Tongjieliang Biomaterials Co., Ltd.；Flaxen fiber is woven Woven roving, purchased from Anji County is good and flax spinning factory.
Embodiment 1
Step 101, lower floor's PLA filament web is prepared using polylactic acid slice.
Step 102, the woven woven roving of flaxen fiber is unreeled, be directly laid on lower floor's PLA filament web, institute The woven woven roving of flaxen fiber is stated to be prepared by tossa.
Step 103, upper strata PLA filament web is prepared using polylactic acid slice.
Step 104, the upper strata PLA filament web is laid on the woven woven roving of the flaxen fiber, and by described in Three layers of fibre web of upper strata PLA filament web, the woven woven roving of the flaxen fiber and lower floor's PLA filament web composition Overall be sent into three-high mill carries out pre-reinforcement, wherein the roller surface temperature of the three-high mill is 125-138 DEG C, hot rolling is scalded It is 10-20s between light time, goes out three layers of fibre web after the three-high mill by winding, obtain Polylactic acid filament yarn non-woven.
Step 105, it is sent into after the Polylactic acid filament yarn non-woven is unreeled in ultrasonic wave compounding machine, wherein, ultrasonic wave glues Being shaped as chalaza is circular, one kind in oval and rhombus, described poly- by controlling the size of the ultrasonic bonds point to make Lactic acid continuous yarn non-woven fabrics compound tense is without bounding point area：There is bounding point area=4-6:1, compound speed is 4-8m/min, described poly- Lactic acid continuous yarn non-woven fabrics go out after the ultrasonic wave compounding machine 260-410g/m2, without bounding point area thickness it is 1-2.5mm in the compound nonwoven cloth.
Step 106, the compound nonwoven cloth is unreeled, width is cut into according to the requirement for containing 5-30KG weight grains respectively Degree × length is（900-1800）mm×(320-580）Mm sheet compound nonwoven cloth, sheet compound nonwoven cloth edge is long Direction doubling is spent, the sheet compound nonwoven cloth after doubling is coincided with the upper and lower, is then sutured along its length, last edge The edge of suture applies hot-pressing, edge-sealing, obtains food storage bag.
In summary, the present invention passes through the selection of acid fiber by polylactic and flaxen fiber, upper strata PLA filament web, lower strata The preparation of lactic acid filament web and the woven woven roving of flaxen fiber, online and the offline combination process of ultrasonic wave selection, are prepared A kind of food storage bag, the food storage bag has natural bacteriostatic mildew resistance, a Moisture absorption ＆ moisture conductivity, does not fall that suede, strength high-durability are good, can weigh Again using it is washable the characteristics of, to colliding with and eminence is fallen and has cushioning effect in transportation, and can be degradable, safe nothing It is malicious, environmentally safe, thus can preferably delay grain quality deterioration speed, and then the foodstuff preservation phase can be extended, had Good market application foreground.
Embodiment 2：
Step 201, it is 30-55g/10min, density 1.24g/cm by melt index3, fusing point is 165-170 DEG C poly- Lactic acid section pre-crystallized 4-6h first under the conditions of 30-40 DEG C, is then warming up to 110 DEG C with 10 DEG C of the condition of heating up per hour, 6-8h is dried under the conditions of 110 DEG C again, the polylactic acid slice water content is reached 0.035-0.045%.
Step 202, will be sent into after the polylactic acid slice of drying and processing is extruded and filtered via feeding, extruder Manifold carries out spinning, and spinning temperature control is at 220-240 DEG C, and spinning speed control is 4000-6000m/min, compressed air Pressure is 0.3-0.5MPa, and cross air blasting chilling temperature is 20-23 DEG C, and wind speed is 0.4-0.8 m/s, air-flow during tubular type air drawing The work air quantity of stretching is 0.75-1m3/ min, pendulum wire device sub-wire frequency is 500-700Hz, by into aspirating under lace curtaining after sub-wire The air-flow suction of bellows and fall on lace curtaining, the speed of suction airstream is 3-8m/s, and it is 0.8- to obtain monofilament linear density 1.2dtex, grammes per square metre 30-60g/m2Lower floor's PLA filament web.
Step 203, the woven woven roving of flaxen fiber is unreeled, be directly laid on lower floor's PLA filament web, institute The woven woven roving of flaxen fiber is stated to be prepared by tossa.
Wherein, the preparation technology of the woven woven roving of the flaxen fiber includes：
1）From the tossa by softening heap storage processing, technique number for 300-350 branch, by two hecklers After sequence, three mixing in doubling step, then it is 550-650tex to machine by spun yarn and number is made, and the twist is 28-35 sth. made by twisting/10cm's Warp thread；
2）From the tossa by softening heap storage processing, technique number for 200-250 branch, by two hecklers After sequence, two mixing in doubling step, then it is 750-880tex to machine by spun yarn and number is made, and the twist is 17-22 sth. made by twisting/10cm's Weft yarn；
3）Using plain weave construction, the warp count is used as 20-30 roots, and the weft count is that 18-25 roots enter Row weaving, it is 150-250g/m to obtain weight2Flaxen fiber fabric.
4）Use it is upper and lower for paper calender roll cylinder, centre for steam roller tube three-roller calendar to the flaxen fiber fabric Press polish is carried out, obtains the woven woven roving of flaxen fiber, 80-110 DEG C of the surface temperature of the three-roller calendar, pressure are during press polish 85-120KG/cm, warp-stretch rate is between 1.5-3% during press polish, and Weft Shrinkage is between 0.7-1.2%, the steam roller tube Superficial velocity be 33-45m/min.
Step 204, melt index is used as 24-50g/10min, density 1.24g/cm3, fusing point is 165-170 DEG C Polylactic acid slice pre-crystallized 4-6h first under the conditions of 30-40 DEG C, then it is warming up to 110 with 10 DEG C of the condition of heating up per hour DEG C, then 6-8h is dried under the conditions of 110 DEG C, the water content of the polylactic acid slice is reached 0.035-0.045%.
Step 205, will be sent into after the polylactic acid slice of drying and processing is extruded and filtered via feeding, extruder Manifold carries out spinning, and spinning temperature control is at 200-220 DEG C, and spinning speed control is 3500-5000m/min, compressed air Pressure is 0.2-0.4MPa, and cross air blasting chilling temperature is 18-22 DEG C, and wind speed is 0.4-0.8 m/s, air-flow during tubular type air drawing The work Boiler pressure control of stretching is in 0.8-1m3/ min, pendulum wire device sub-wire frequency is 600-900Hz, by under lace curtaining after sub-wire The air-flow suction of suction bellows and fall on lace curtaining, the speed of suction airstream is 10-15m/s, forms monofilament linear density and is 1.5-3.0dtex, grammes per square metre 80-100g/m2Upper strata PLA filament web.
Step 206, the upper strata PLA filament web is laid on the woven woven roving of the flaxen fiber, and by described in Three layers of fibre web of upper strata PLA filament web, the woven woven roving of the flaxen fiber and lower floor's PLA filament web composition Overall be sent into three-high mill carries out pre-reinforcement, wherein the roller surface temperature of the three-high mill is 125-138 DEG C, hot rolling is scalded It is 10-20s between light time, goes out three layers of fibre web after the three-high mill by winding, obtain Polylactic acid filament yarn non-woven.
Wherein, the three-high mill is that centre is cotton roller, and the non-woven fabrics that top is polishing roll, bottom is lower smooth roll is with rolling Machine, the cotton roller do not heat, and the polishing roll and lower smooth roll are heating roller, and three layers of fibre web is in hot rolling, the upper strata PLA filament web is plated by the lower smooth roll plasticizing, after cotton roller upset, lower floor's PLA filament web quilt The polishing roll plasticizing is plated, so as to obtain two-sided plasticizing hot light, the Polylactic acid filament yarn non-woven of green tack together.
Step 207, it is sent into after the Polylactic acid filament yarn non-woven is unreeled in ultrasonic wave compounding machine, wherein, ultrasonic wave glues Being shaped as chalaza is circular, one kind in oval and rhombus, described poly- by controlling the size of the ultrasonic bonds point to make Lactic acid continuous yarn non-woven fabrics compound tense is without bounding point area：There is bounding point area=4-6:1, compound speed is 4-8m/min, described poly- Lactic acid continuous yarn non-woven fabrics go out after the ultrasonic wave compounding machine 260-410g/m2, without bounding point area thickness it is 1-2.5mm in the compound nonwoven cloth.
Step 208, the compound nonwoven cloth is unreeled, width is cut into according to the requirement for containing 5-30KG weight grains respectively Degree × length is（900-1800）mm×(320-580）Mm sheet compound nonwoven cloth, sheet compound nonwoven cloth edge is long Direction doubling is spent, the sheet compound nonwoven cloth after doubling is coincided with the upper and lower, is then sutured along its length, last edge The edge of suture applies hot-pressing, edge-sealing, obtains food storage bag.
In summary, the present invention passes through the selection of acid fiber by polylactic and flaxen fiber, upper strata PLA filament web, lower strata The preparation of lactic acid filament web and the woven woven roving of flaxen fiber, online and the offline combination process of ultrasonic wave selection, are prepared A kind of food storage bag, the food storage bag has natural bacteriostatic mildew resistance, a Moisture absorption ＆ moisture conductivity, does not fall that suede, strength high-durability are good, can weigh Again using it is washable the characteristics of, to colliding with and eminence is fallen and has cushioning effect in transportation, and can be degradable, safe nothing It is malicious, environmentally safe, thus can preferably delay grain quality deterioration speed, and then the foodstuff preservation phase can be extended, had Good market application foreground.
Embodiment 3：
1）The preparation of Polylactic acid filament yarn non-woven
（1）Prepare lower floor's PLA filament web
A. melt index is used as 30g/10min, density 1.24g/cm3, fusing point is 170 DEG C of polylactic acid slice；
B. by polylactic acid slice first under the conditions of 40 DEG C pre-crystallized 4-6h, then with 10 DEG C of the condition of heating up per hour 110 DEG C are warming up to, 6-8h is dried under the conditions of 110 DEG C, polylactic acid slice water content is reached 0.035%；
C. melt index is used as 55g/10min, density 1.24g/cm3, fusing point is 165 DEG C of polylactic acid slice, will Polylactic acid slice is sent into manifold and carries out spinning after extruding and filter via feeding, extruder, spinning temperature is controlled at 240 DEG C, Spinning speed control is 6000m/min, and compressed air pressure 0.5MPa, cross air blasting chilling temperature is 23 DEG C, wind speed 0.8 M/s, the work Boiler pressure control of air-flow stretching is in 1m during tubular type air drawing3/ min, pendulum wire device sub-wire frequency are 500Hz, through dividing Fallen after silk by being aspirated into the air-flow that bellows are aspirated under lace curtaining on lace curtaining, the speed of suction airstream is 3m/s, forms list Linear density is 1.2dtex, grammes per square metre 30g/m2Lower floor's PLA filament web；
（2）The woven woven roving of flaxen fiber is unreeled, direct-on-line is laid on described lower floor's PLA filament web；
（3）Prepare upper strata PLA filament web
Melt index is used as 50g/10min, density 1.24g/cm3, fusing point is 165 DEG C of polylactic acid slice, will be through Cross pre-crystallized and dry, water content reach 0.045% polylactic acid slice via feeding, extruder extrude and filtering after be sent into and spin Silk casing carries out spinning, and spinning temperature control is at 200 DEG C, and spinning speed control is 3500 m/min, and compressed air pressure is 0.2MPa, cross air blasting chilling temperature are 18 DEG C, and wind speed be 0.4 m/s, the work air quantity control that air-flow stretches during tubular type air drawing System is in 0.8m3/ min, pendulum wire device sub-wire frequency is 600Hz, is fallen after sub-wire by being aspirated into the air-flow of suction bellows under lace curtaining Into on lace curtaining, the speed of suction airstream is 10m/s, and it is 1.5dtex, grammes per square metre 80g/m to form monofilament linear density2Upper strata PLA filament web；
2）Pre-reinforcement
Three that upper strata PLA filament web, the woven woven roving of flaxen fiber and lower floor's PLA filament web are integrated Layer fibre web, which is integrally sent into three-high mill, carries out pre-reinforcement, and the roller surface temperature of three-high mill is 125 DEG C, the hot rolling hot light time For 10s, go out by winding and as the Polylactic acid filament yarn non-woven tentatively reinforced after three-high mill, wherein three-high mill is centre For cotton roller, the upper and lower non-woven fabrics milling train for smooth roll, cotton roller does not heat, and upper and lower smooth roll is heating roller, upper strata first during hot rolling PLA filament web is plastified by lower hot-rolling and plated, and after the upset of cotton roller, lower floor's PLA filament web is plastified by upper hot-rolling to scald It is flat, obtain the PLA non-woven fabrics of two-sided plasticizing hot light, green tack together；
3）Ultrasonic wave is compound
Polylactic acid filament yarn non-woven Jing Guo pre-reinforcement is unreeled, is sent into ultrasonic wave compounding machine, wherein ultrasonic bonds Point is shaped as rhombus, by controlling the size of bounding point to make Polylactic acid filament yarn non-woven compound tense without bounding point area：Have viscous Chalaza area=4:1, compound speed is 8m/min, and rolled to form compound nonwoven cloth after going out ultrasonic wave compounding machine, grammes per square metre is 260g/m2, without bounding point area thickness it is 1mm in compound nonwoven cloth；
4）Bag
Compound nonwoven cloth is unreeled, according to contain 5KG weight grains requirement cut into width × length for 900mm × 320mm sheet compound nonwoven cloth, alignd by the sheet compound nonwoven cloth elongatedness direction doubling, and by three sides, Ran Houyan Length direction is sutured according to the sewing tech of conventional food storage bag, and to increase fastness, the edge along suture further applies Hot-pressing, edge-sealing, it is finally made the food storage bag of natural bacteriostatic.
Further, the flaxen fiber in the woven woven roving of flaxen fiber is tossa, and its main preparation process includes：
A. warp thread is spinned：From by softening heap storage processing, the tossa that technique number is 350, combed by two After ramie process, three mixing in doubling step, then it is 550tex to machine by spun yarn and number is made, and the twist is 35 sth. made by twisting/10cm warp Yarn；
B. weft yarn is spinned：From by softening heap storage processing, the tossa that technique number is 250, combed by two After ramie process, two mixing in doubling step, then it is 750tex to machine by spun yarn and number is made, and the twist is 22 sth. made by twisting/10cm latitude Yarn；
C. weave：Warp count is used as 30 using plain weave construction, during weaving, and weft count is 25, is obtained Weight is 150g/m2Flaxen fiber fabric；
D. press polish：The upper and lower for paper calender roll cylinder of printing and dyeing mill's compress is used, centre is the three-roller calendar pair of steam roller tube Flaxen fiber fabric carries out press polish, 80 DEG C, pressure 85KG/cm of adjustment calender surface temperature, and control warp-wise is stretched during press polish Long rate is between 1.5%, and for Weft Shrinkage between 0.7%, steam roller tube superficial velocity is 45m/m, finally obtains surfacing, hand Feel the soft woven woven roving of flaxen fiber.
Embodiment 4：
1）The preparation of Polylactic acid filament yarn non-woven
（1）Prepare lower floor's PLA filament web
A. melt index is used as 40g/10min, density 1.24g/cm3, fusing point is 170 DEG C of polylactic acid slice；
B. by polylactic acid slice first under the conditions of 35 DEG C pre-crystallized 4-6h, then with 10 DEG C of the condition of heating up per hour 110 DEG C are warming up to, 6-8h is dried under the conditions of 110 DEG C, polylactic acid slice water content is reached 0.04%；
C. it is sent into manifold after polylactic acid slice being extruded and filtered via feeding, extruder and carries out spinning, spinning temperature Control is at 230 DEG C, and spinning speed control is 5000m/min, and compressed air pressure 0.4MPa, cross air blasting chilling temperature is 21 DEG C, wind speed 0.6m/s, the work Boiler pressure control of air-flow stretching is in 0.85m during tubular type air drawing3/ min, pendulum wire device sub-wire frequency Rate is 600Hz, is fallen after sub-wire by being aspirated into the air-flow that bellows are aspirated under lace curtaining on lace curtaining, the speed of suction airstream is 6m/s, it is 1dtex, grammes per square metre 50g/m to form monofilament linear density2Lower floor's PLA filament web；
（2）The woven woven roving of flaxen fiber is unreeled, direct-on-line is laid on described lower floor's PLA filament web；
（3）Prepare upper strata PLA filament web
Melt index is used as 40g/10min, density 1.24g/cm3, fusing point is 170 DEG C of polylactic acid slice, will be through Cross pre-crystallized and dry, water content reach 0.04% polylactic acid slice via feeding, extruder extrude and filtering after be sent into spinning Casing carries out spinning, and spinning temperature control is at 210 DEG C, and spinning speed control is 4000 m/min, and compressed air pressure is 0.3MPa, cross air blasting chilling temperature are 20 DEG C, wind speed 0.6m/s, the work Boiler pressure control of air-flow stretching during tubular type air drawing In 0.9m3/ min, pendulum wire device sub-wire frequency are 800 Hz, are fallen after sub-wire by being aspirated into the air-flow of suction bellows under lace curtaining Into on lace curtaining, the speed of suction airstream is 13m/s, and it is 2.5dtex, grammes per square metre 90g/m to form monofilament linear density2Upper strata Lactic acid filament web；
2）Pre-reinforcement
Three that upper strata PLA filament web, the woven woven roving of flaxen fiber and lower floor's PLA filament web are integrated Layer fibre web, which is integrally sent into three-high mill, carries out pre-reinforcement, and the roller surface temperature of three-high mill is 130 DEG C, the hot rolling hot light time For 15s, go out by winding and as the Polylactic acid filament yarn non-woven tentatively reinforced after three-high mill, wherein three-high mill is centre For cotton roller, the upper and lower non-woven fabrics milling train for smooth roll, cotton roller does not heat, and upper and lower smooth roll is heating roller, upper strata first during hot rolling PLA filament web is plastified by lower hot-rolling and plated, and after the upset of cotton roller, lower floor's PLA filament web is plastified by upper hot-rolling to scald It is flat, obtain the PLA non-woven fabrics of two-sided plasticizing hot light, green tack together；
3）Ultrasonic wave is compound
Polylactic acid filament yarn non-woven Jing Guo pre-reinforcement is unreeled, is sent into ultrasonic wave compounding machine, wherein ultrasonic bonds Point is shaped as ellipse, by controlling the size of bounding point to make Polylactic acid filament yarn non-woven compound tense without bounding point area：Have Bounding point area=5:1, compound speed is 6m/min, and rolled to form compound nonwoven cloth after going out ultrasonic wave compounding machine, grammes per square metre is 350g/m2, without bounding point area thickness it is 1.8mm in compound nonwoven cloth；
4）Bag
Compound nonwoven cloth is unreeled, according to contain 10KG weight grains requirement cut into width × length for 1140mm × 400mm sheet compound nonwoven cloth, alignd by the sheet compound nonwoven cloth elongatedness direction doubling, and by three sides, Ran Houyan Length direction is sutured according to the sewing tech of conventional food storage bag, and to increase fastness, the edge along suture further applies Hot-pressing, edge-sealing, it is finally made the food storage bag of natural bacteriostatic.
Further, the flaxen fiber in the woven woven roving of flaxen fiber is tossa, and its main preparation process includes：
A. warp thread is spinned：From by softening heap storage processing, the tossa that technique number is 320, combed by two After ramie process, three mixing in doubling step, then it is 600tex to machine by spun yarn and number is made, and the twist is 30 sth. made by twisting/10cm warp Yarn；
B. weft yarn is spinned：From by softening heap storage processing, the tossa that technique number is 220, combed by two After ramie process, two mixing in doubling step, then it is 800tex to machine by spun yarn and number is made, and the twist is 20 sth. made by twisting/10cm latitude Yarn；
C. weave：Warp count is used as 25 using plain weave construction, during weaving, and weft count is 22, is obtained Weight is 200g/m2Flaxen fiber fabric；
D. press polish：The upper and lower for paper calender roll cylinder of printing and dyeing mill's compress is used, centre is the three-roller calendar pair of steam roller tube Flaxen fiber fabric carries out press polish, 95 DEG C, pressure 100KG/cm of adjustment calender surface temperature, and control warp-wise is stretched during press polish Long rate is between 2.5%, and for Weft Shrinkage between 1%, steam roller tube superficial velocity is 40m/m, finally obtains surfacing, feel The soft woven woven roving of flaxen fiber.
Embodiment 5：
1）The preparation of Polylactic acid filament yarn non-woven
（1）Prepare lower floor's PLA filament web
A. melt index is used as 55g/10min, density 1.24g/cm3, fusing point is 165 DEG C of polylactic acid slice；
B. by polylactic acid slice first under the conditions of 30 DEG C pre-crystallized 4-6h, then with 10 DEG C of the condition of heating up per hour 110 DEG C are warming up to, 6-8h is dried under the conditions of 110 DEG C, polylactic acid slice water content is reached 0.045%；
C. it is sent into manifold after polylactic acid slice being extruded and filtered via feeding, extruder and carries out spinning, spinning temperature Control is at 220 DEG C, and spinning speed control is 4000m/min, and compressed air pressure 0.3MPa, cross air blasting chilling temperature is 20 DEG C, wind speed 0.4m/s, the work Boiler pressure control of air-flow stretching is in 0.75m during tubular type air drawing3/ min, pendulum wire device sub-wire frequency Rate is 700Hz, is fallen after sub-wire by being aspirated into the air-flow that bellows are aspirated under lace curtaining on lace curtaining, the speed of suction airstream is 8m/s, it is 0.8dtex, grammes per square metre 60g/m to form monofilament linear density2Lower floor's PLA filament web；
（2）The woven woven roving of flaxen fiber is unreeled, direct-on-line is laid on described lower floor's PLA filament web；
（3）Prepare upper strata PLA filament web
Melt index is used as 24g/10min, density 1.24g/cm3, fusing point is 170 DEG C of polylactic acid slice, will be through Cross pre-crystallized and dry, water content reach 0.035% polylactic acid slice via feeding, extruder extrude and filtering after be sent into and spin Silk casing carries out spinning, and spinning temperature control is at 220 DEG C, and spinning speed control is 5000 m/min, and compressed air pressure is 0.4MPa, cross air blasting chilling temperature are 22 DEG C, and wind speed be 0.8 m/s, the work air quantity control that air-flow stretches during tubular type air drawing System is in 1m3/ min, pendulum wire device sub-wire frequency is 900Hz, is fallen after sub-wire by being aspirated into the air-flow of suction bellows under lace curtaining Into on lace curtaining, the speed of suction airstream is 15m/s, and it is 3.0dtex, grammes per square metre 100g/m to form monofilament linear density2Upper strata PLA filament web；
2）Pre-reinforcement
Three that upper strata PLA filament web, the woven woven roving of flaxen fiber and lower floor's PLA filament web are integrated Layer fibre web, which is integrally sent into three-high mill, carries out pre-reinforcement, and the roller surface temperature of three-high mill is 138 DEG C, the hot rolling hot light time For 20s, go out by winding and as the Polylactic acid filament yarn non-woven tentatively reinforced after three-high mill, wherein three-high mill is centre For cotton roller, the upper and lower non-woven fabrics milling train for smooth roll, cotton roller does not heat, and upper and lower smooth roll is heating roller, upper strata first during hot rolling PLA filament web is plastified by lower hot-rolling and plated, and after the upset of cotton roller, lower floor's PLA filament web is plastified by upper hot-rolling to scald It is flat, obtain the PLA non-woven fabrics of two-sided plasticizing hot light, green tack together；
3）Ultrasonic wave is compound
Polylactic acid filament yarn non-woven Jing Guo pre-reinforcement is unreeled, is sent into ultrasonic wave compounding machine, wherein ultrasonic bonds Point is shaped as circle, by controlling the size of bounding point to make Polylactic acid filament yarn non-woven compound tense without bounding point area：Have viscous Chalaza area=6:1, compound speed is 4m/min, and rolled to form compound nonwoven cloth after going out ultrasonic wave compounding machine, grammes per square metre is 410g/m2, without bounding point area thickness it is 2.5mm in compound nonwoven cloth；
4）Bag
Compound nonwoven cloth is unreeled, according to contain 30KG weight grains requirement cut into width × length for 1800mm × 580mm sheet compound nonwoven cloth, alignd by the sheet compound nonwoven cloth elongatedness direction doubling, and by three sides, Ran Houyan Length direction is sutured according to the sewing tech of conventional food storage bag, and to increase fastness, the edge along suture further applies Hot-pressing, edge-sealing, it is finally made the food storage bag of natural bacteriostatic.
Further, the flaxen fiber in the woven woven roving of flaxen fiber is tossa, and its main preparation process includes：
A. warp thread is spinned：From by softening heap storage processing, the tossa that technique number is 300, combed by two After ramie process, three mixing in doubling step, then it is 650tex to machine by spun yarn and number is made, and the twist is 28 sth. made by twisting/10cm warp Yarn；
B. weft yarn is spinned：From by softening heap storage processing, the tossa that technique number is 200, combed by two After ramie process, two mixing in doubling step, then it is 880tex to machine by spun yarn and number is made, and the twist is 17 sth. made by twisting/10cm latitude Yarn；
C. weave：Warp count is used as 20 using plain weave construction, during weaving, and weft count is 18, is obtained Weight is 250g/m2Flaxen fiber fabric；
D. press polish：The upper and lower for paper calender roll cylinder of printing and dyeing mill's compress is used, centre is the three-roller calendar fiber crops of steam roller tube Fiber fabric carries out press polish, 110 DEG C, pressure 120KG/cm of adjustment calender surface temperature, and control warp-wise is stretched during press polish Long rate is between 3%, and for Weft Shrinkage between 1.2%, steam roller tube superficial velocity is 33m/m, finally obtains surfacing, feel The soft woven woven roving of flaxen fiber.
To the capillary effect of the food storage bag prepared by above-mentioned 3,4,5 three embodiments, wearability, thickness, wet guilding and strong Degree is tested and analyzed, and its result is as shown in table 1.The standard and judgment of wherein method of testing reference is as follows：
（1）Thickness
Using YG（B）141D type digital textile thickness gauge thickness, method of testing are held according to GB/T3820-1997 standards OK.
（2）Capillary effect（Hygroscopicity）
Using YG871 capillary effect analyzers, tested according to standard ZB W 04019-1990, test the woven side of flaxen fiber Lattice cloth specification 25mm × 300mm, test height value after 30min.
（3）Wearability（Do not fall suede）
Using YG401 fabric plain grinding instrument, tested according to standard GB/T 13775-1992.
（4）Wet guilding（Hydrofuge amount）
Using LCK-131 fabric moisture transmission amount analyzers, tested according to standard GB/T 12704.2-2009.
（5）Intensity
Using YG026H-50 imported electronic fabric strength testers, method of testing performs according to GB/T3923.1 standards.
Table 1：The test result of food storage bag
The food storage bag that be can be seen that from the data in table 1 obtained by 3,4,5 three embodiments be respectively provided with preferably strength and Wearability, the unique advantage compared with commercial polypropylene spun-bonded non-woven fabrics bag are：Extraordinary hydrofuge amount and capillary effect（Inhale It is moist）, commercial polypropylene spun-bonded non-woven fabrics bag is as a result of 100% polypropylene fibre, capillary effect zero, thus this hair The food storage bag of bright preparation is derived from the PLA and tossa of natural material due to reasonably having arranged in pairs or groups, with natural bacteriostatic Property, while insect prevention and mildew resistance, it can be good at absorbing damp and hot steam caused by the biochemistry and physiological activity of grain in itself Molecule, and quickly quickly exported to hot wet steam in external environment by PLA and the good wet guilding of tossa, and bag body surface The plastifying state that face acid fiber by polylactic reaches can also obstruct the intrusion of extraneous moisture well, and then can more preferably maintain grain Quality and nutritional ingredient, the foodstuff preservation phase is extended, and reusable and washable, with abandoning energy after landfill after old It is degradable, it is a kind of safe and healthy grain packaging new material, belongs to environmentally friendly machine, there will be the application of extraordinary market Prospect.
In summary, the present invention passes through the selection of acid fiber by polylactic and flaxen fiber, upper strata PLA filament web, lower strata The preparation of lactic acid filament web and the woven woven roving of flaxen fiber, online and the offline combination process of ultrasonic wave selection, are prepared A kind of food storage bag, the food storage bag has natural bacteriostatic mildew resistance, a Moisture absorption ＆ moisture conductivity, does not fall that suede, strength high-durability are good, can weigh Again using it is washable the characteristics of, to colliding with and eminence is fallen and has cushioning effect in transportation, and can be degradable, safe nothing It is malicious, environmentally safe, thus can preferably delay grain quality deterioration speed, and then the foodstuff preservation phase can be extended, had Good market application foreground.
The embodiment of the present invention additionally provides a kind of food storage bag, and the food storage bag is by above-mentioned each any storage for implementing to exemplify The preparation method of grain sack is prepared, and the food storage bag is made up of acid fiber by polylactic and tossa.
Food storage bag provided by the invention has natural bacteriostatic mildew resistance, Moisture absorption ＆ moisture conductivity, strength high-durability is good, does not fall Suede, it is reusable and washable the characteristics of, this outer bag body is fluffy abundant without bounding point region, can buffer in transportation Collide with the damage fallen with eminence, and can be degradable, it is safe and non-toxic, environmentally safe, thus preferably can protect and prolong The deterioration of slow grain quality, extends the foodstuff preservation phase, is a kind of very safe and healthy grain packaging material.
Although being described in detail above with general explanation, embodiment and experiment to the present invention, But on the basis of the present invention, it can be modified or improved, this will be apparent to those skilled in the art.Cause This, these modifications or improvements, belong to the scope of protection of present invention without departing from theon the basis of the spirit of the present invention.

Claims (6)

1. a kind of preparation method of food storage bag, it is characterised in that methods described includes：
1）Lower floor's PLA filament web is prepared using polylactic acid slice；
2）The woven woven roving of flaxen fiber is unreeled, is directly laid on lower floor's PLA filament web, the flaxen fiber machine Woven roving is knitted to be prepared by tossa；
3）Upper strata PLA filament web is prepared using polylactic acid slice；
4）The upper strata PLA filament web is laid on the woven woven roving of the flaxen fiber, and by the upper strata PLA Three layers of fibre web of filament web, the woven woven roving of the flaxen fiber and lower floor's PLA filament web composition are integrally sent into three Pre-reinforcement is carried out in roller mill, wherein the roller surface temperature of the three-high mill is 125-138 DEG C, the hot rolling hot light time is 10-20s, go out three layers of fibre web after the three-high mill by winding, obtain Polylactic acid filament yarn non-woven；
5）It is sent into after the Polylactic acid filament yarn non-woven is unreeled in ultrasonic wave compounding machine, wherein, the shape of ultrasonic bonds point For one kind in circular, ellipse and rhombus, by control the size of the ultrasonic bonds point make the PLA long filament without Cloth compound tense is spun without bounding point area：There is bounding point area=4-6:1, compound speed is 4-8m/min, the PLA long filament without It is 260-410g/ to spin cloth to go out after the ultrasonic wave compounding machine by being wound into for compound nonwoven cloth, the compound nonwoven cloth grammes per square metre m2, without bounding point area thickness it is 1-2.5mm in the compound nonwoven cloth；
6）The compound nonwoven cloth is unreeled, cutting into width × length respectively according to the requirement for containing 5-30KG weight grains is 900-1800mm × 320-580mm sheet compound nonwoven cloth, the sheet compound nonwoven cloth doubling along its length makes pair The sheet compound nonwoven cloth after folding coincides with the upper and lower, and is then sutured along its length, and the last edge along suture applies Hot-pressing, edge-sealing, obtain food storage bag.
2. according to the method for claim 1, it is characterised in that described that lower floor's PLA long filament is prepared using polylactic acid slice The preparation method of fibre web, including：
It is 30-55g/10min, density 1.24g/cm by melt index3, fusing point is that 165-170 DEG C of polylactic acid slice exists first Pre-crystallized 4-6h under the conditions of 30-40 DEG C, 110 DEG C then are warming up to 10 DEG C of the condition of heating up per hour, then under the conditions of 110 DEG C 6-8h is dried, the polylactic acid slice water content is reached 0.035-0.045%；
Spun manifold is sent into after the polylactic acid slice of drying and processing is extruded and filtered via feeding, extruder Silk, at 220-240 DEG C, spinning speed control is 4000-6000m/min, compressed air pressure 0.3- for spinning temperature control 0.5MPa, cross air blasting chilling temperature are 20-23 DEG C, and wind speed be 0.4-0.8 m/s, the work that air-flow stretches during tubular type air drawing Air quantity is 0.75-1m3/ min, pendulum wire device sub-wire frequency is 500-700Hz, by the air-flow into suction bellows under lace curtaining after sub-wire Aspirate and fall on lace curtaining, the speed of suction airstream is 3-8m/s, and it is 0.8-1.2dtex to obtain monofilament linear density, and grammes per square metre is 30-60g/m2Lower floor's PLA filament web.
3. according to the method for claim 1, it is characterised in that described that upper strata PLA long filament is prepared using polylactic acid slice The preparation method of fibre web, including：
Melt index is used as 24-50g/10min, density 1.24g/cm3, fusing point is that 165-170 DEG C of polylactic acid slice is first First pre-crystallized under the conditions of 30-40 DEG C 4-6h, 110 DEG C then are warming up to 10 DEG C of the condition of heating up per hour, then in 110 DEG C of bars 6-8h is dried under part, the water content of the polylactic acid slice is reached 0.035-0.045%；
Spun manifold is sent into after the polylactic acid slice of drying and processing is extruded and filtered via feeding, extruder Silk, at 200-220 DEG C, spinning speed control is 3500-5000m/min, compressed air pressure 0.2- for spinning temperature control 0.4MPa, cross air blasting chilling temperature are 18-22 DEG C, and wind speed be 0.4-0.8 m/s, the work that air-flow stretches during tubular type air drawing Boiler pressure control is in 0.8-1m3/ min, pendulum wire device sub-wire frequency is 600-900Hz, by into aspirating bellows under lace curtaining after sub-wire Air-flow is aspirated and fallen on lace curtaining, and the speed of suction airstream is 10-15m/s, and it is 1.5- to form monofilament linear density 3.0dtex, grammes per square metre 80-100g/m2Upper strata PLA filament web.
4. according to the method for claim 1, it is characterised in that the preparation technology of the woven woven roving of flaxen fiber includes：
1）From the tossa by softening heap storage processing, technique number for 300-350 branch, by two rippling working procedures, three After road mixing in doubling step, then it is 550-650tex to machine by spun yarn and number is made, and the twist is 28-35 sth. made by twisting/10cm warp thread；
2）From the tossa by softening heap storage processing, technique number for 200-250 branch, by two rippling working procedures, two After road mixing in doubling step, then it is 750-880tex to machine by spun yarn and number is made, and the twist is 17-22 sth. made by twisting/10cm weft yarn；
3）Weaved using plain weave construction, it is 150-250g/m to obtain weight2Flaxen fiber fabric；
4）Use upper and lower for paper calender roll cylinder, centre is carried out for the three-roller calendar of steam roller tube to the flaxen fiber fabric Press polish, obtains the woven woven roving of flaxen fiber, and the surface temperature of the three-roller calendar is 80-110 DEG C during press polish, pressure 85- 120KG/cm, warp-stretch rate is between 1.5-3% during press polish, and Weft Shrinkage is between 0.7-1.2%, the table of the steam roller tube Face velocity is 33-45m/min.
5. according to the method for claim 1, it is characterised in that the three-high mill is that centre is cotton roller, and top is glazing Roller, the non-woven fabrics milling train that bottom is lower smooth roll, the cotton roller do not heat, and the polishing roll and lower smooth roll are heating roller, institute Three layers of fibre web are stated in hot rolling, the upper strata PLA filament web is plated by the lower smooth roll plasticizing, is overturn through the cotton roller Afterwards, lower floor's PLA filament web is plastified by the polishing roll and plated, and so as to obtain two-sided plasticizing hot light, green tack exists Polylactic acid filament yarn non-woven together.
A kind of 6. food storage bag, it is characterised in that the food storage bag by any described food storage bags of claim 1-5 preparation method It is prepared, the food storage bag is made up of acid fiber by polylactic and tossa.
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CN107161495B (en) * 2017-04-20 2019-05-10 江苏云之尚节能科技有限公司 The preparation method of fresh food heat preservation environment protection speed fortune packaging bag
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CN110509630B (en) * 2019-08-29 2022-05-24 嘉兴学院 Mat for palm fiber home textiles and preparation method thereof
CN110641821A (en) * 2019-09-27 2020-01-03 杭州蒸气波网络科技有限公司 Packaging bag for packaging food

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CN204660317U (en) * 2015-04-21 2015-09-23 长葛市英达麻纺织厂 A kind of flour bag
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DE3222146A1 (en) * 1981-07-09 1983-01-27 Veb Kombinat Technische Textilien Karl-Marx-Stadt, Ddr 9010 Karl-Marx-Stadt Textile packaging material, especially for use for heavy-duty sacks
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CN204398407U (en) * 2014-11-25 2015-06-17 李成光 A kind of moisture-inhibiting oxygen barrier is automatically guaranteed the quality and fresh-keeping compound food storage bag
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CN204660315U (en) * 2015-04-21 2015-09-23 长葛市英达麻纺织厂 A kind of containing grains bag

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