CN107735528A

CN107735528A - Purposes without wood-fibred composition and in carton package

Info

Publication number: CN107735528A
Application number: CN201680033919.8A
Authority: CN
Inventors: B·石; M·M·姆莱茨瓦; 庄礼宗
Original assignee: Kimberly Clark Worldwide Inc
Current assignee: Kimberly Clark Worldwide Inc; Kimberly Clark Corp
Priority date: 2015-06-30
Filing date: 2016-06-29
Publication date: 2018-02-23
Also published as: GB2557052B; BR112017026181A2; US20180134472A1; WO2017004111A1; KR20180014829A; GB201800708D0; GB2557052A; AU2016285836A1; MX2017015906A; BR112017026181B1; AU2016285836B2

Abstract

A kind of paperboard packaging material includes：The top layer for the non-wood-fiber being blended with lumber fibre is included, wherein the non-wood-fiber accounts for the 5% to 100% of the top layer；The backing layer for the non-wood-fiber being blended with lumber fibre is included, wherein the non-wood-fiber accounts for the 5% to 100% of the backing layer；And it is arranged on the intermediate layer between the top layer and the backing layer.The intermediate layer can include 5% to 100% non-timber filler fibre.The non-timber filler fibre can be straw.Non-wood-fiber can be bamboo.

Description

Purposes without wood-fibred composition and in carton package

Background technology

This disclosure relates to non-timber substitutes purposes of the natural fiber in the fluting medium for carton package.Conventional hardwood The replacement of fiber is realized by providing the composite fibre composition of sufficient mechanical strength for carton package application.

Traditionally the paper pulp from the fast-growth trees of such as pine tree is utilized as the raw material of carton package.Closely Nian Lai, due to the worry to Environmental Sustainability, using OCC (OCC) material of recycling increasingly by joyous Meet.However, OCC is frequently necessary to repulping and deinking process.Therefore, with the increase of recycling number, recycling Fiber shorten, die down and be contaminated.Along with many manufacturers are to the demand of the fiber of recycling and usage amount Increase, the cost of the fiber of recycling are also increasing.Cause existing recycled fiber towards the development of single current recycling Pollutant (chopped fiber, the plastic tape and hotmelt) increase and the mixing of fiber increase of fiber in stream.Use recycling profit Paper or cardboard may be more difficult to realize such as intensity (compression, Edge Crush, rupture and tensile strength), hardness, rigidity, resistance to The key performance requirements of moist, grease resistance and freeze/thaw tolerance.

Solid unbleached sulphate (SUS) or solid bleached sulfate (SBS) are by containing at least 80% primary length drift The Bristol board grade of the dispensing production of whitewood's slurry.Most bleached paperboard is coated with kaolin thin layer, to improve its printing Surface flatness.SBS is most popular in the U.S..Unfortunately, as long stapled NBSK (northern bleached softwood kraft paper) Supply all suffer from huge pressure in economy and the aspect of environment two.Therefore, the cost of NBSK fibers significantly skyrockets, so as to produce The needs of the raw substitute for finding optimization paper board strength.

These methods depend on the fiber based on trees.Using the fibrous raw material grown in shorter lifetime and make It can be helped to realize the target of sustainable development of enterprise with the ability from agricultural or the residue of industrial processes, and reduced to gloomy The environment of woods influences and carbon footprint (with eCO2 unit dosages).

The pulping process of non-timber natural fiber depends on raw material, and detailed step can be in Sridach, W. (2010),The Environmentally Benign Pulping Process of Non-wood Fibers, Suranaree J.Sci.Technol., 17 (2), 105-123, and Hurter and Byrd United States Patent (USP) 6,302 is authorized, Seen in 997B1.The non-timber natural fiber of replacement, such as replace timber fine using field crop fiber or agricultural residue Dimension, it is considered to be more sustainable.The example of these natural materials has mestha, flax, bamboo, cotton, jute, hemp, sword Fiber crops, bagasse, cornstalk, rice straw, straw, balloonflower root, switchgrass, reed, Lu Di and seawater or fresh water algae/marine alga or water plant Such as water hyacinth.Due to including many reasons of seasonal availability, chemical recovery problem, brightness of pulp, dioxide-containing silica etc., Non-wood-fiber source accounts for the about 5-10% of global pulp yield.However, they provide a kind of selection, any goods producer It can explore and add green color component in its final products.

It is alternative natural fine including the non-timber from marine alga, algae, cornstalk, straw, rice straw, bamboo, mestha etc. The composite fibre composition of dimension can be selected by producing without trees product come the one kind to solve the above problems.

Previous method (referring to Darling U.S. Patent number 1,829,852) (is not fiber sheet using the straw of chopping Body) manufacture cardboard.Described in another method (referring to Huang and Peng U.S. Patent Publication No. 2006/0070295) Non-wood (corn or wheat) for the Weeds distribution in agricultural planting and cultivation covers pad.Finally, except agricultural residues Outside fiber, also using chitosan come improve the anti-flattening of fluting medium (referring to the U.S. Patent number 4 for authorizing Dzurik, 102,738)。

Accordingly, it is desirable to provide the paper pulp material for substituting timber replaces the conventional fibrous materials used in carton package.Separately Outside, the needs of firmer, the lighter material for allowing to reduce packed weight are growing.Although some previous effort are Attempt using alternative fiber production application in building and the composite plate of furniture, but be a lack of production and be used for the non-of carton package application The sustainable trial of timber natural fiber.Therefore, the disclosure passes through replacement of the offer available for the carton package of continuity of environment The material of timber fills up this blank.

The content of the invention

This disclosure relates to a kind of paperboard packaging material, the paperboard packaging material includes：It is non-comprising being blended with lumber fibre The top layer of lumber fibre, wherein non-wood-fiber account for the 5% to 100% of top layer；It is fine comprising the non-timber being blended with lumber fibre The backing layer of dimension, wherein non-wood-fiber account for the 5% to 100% of backing layer；And it is arranged on the intermediate layer between top layer and backing layer.In Interbed can include 5% to 100% non-timber filler fibre.Non-timber filler fibre can be selected from cornstalk, stalk, other Land natural fiber and combinations thereof.Stalk can be selected from wheat, rice, oat, barley, rye, flax, grass and combinations thereof.Other Land natural fiber be selected from flax, bamboo, cotton, jute, hemp, sisal hemp, bagasse, mestha, the dried immature fruit of citron orange, switchgrass, Chinese silvergrass and its Combination.Non-timber filler fibre can be straw.Non-wood-fiber can be bamboo.

The disclosure further relates to a kind of paperboard packaging material, and the paperboard packaging material includes：Include what is be blended with lumber fibre The top layer of non-wood-fiber, wherein non-wood-fiber account for the 50% to 85% of top layer, and wherein non-wood-fiber is bamboo；Comprising with The backing layer of the non-wood-fiber of lumber fibre blending, wherein non-wood-fiber account for the 50% to 85% of backing layer, and wherein non-timber is fine Dimension is bamboo；And it is arranged on the intermediate layer between top layer and backing layer.

The disclosure further relates to a kind of paperboard packaging material, and the paperboard packaging material includes：Include what is be blended with lumber fibre The top layer of non-wood-fiber, wherein non-wood-fiber account for the 50% to 85% of top layer, and wherein non-wood-fiber is bamboo；Comprising with The backing layer of the non-wood-fiber of lumber fibre blending, wherein non-wood-fiber account for the 50% to 85% of backing layer, and wherein non-timber is fine Dimension is bamboo；And the intermediate layer between top layer and backing layer is arranged on, wherein intermediate layer is filled out comprising 5% to 100% non-timber Expect fiber.

Brief description of the drawings

By reference to following explanation, appended claims and accompanying drawing, foregoing and other features and aspect of the disclosure with And realize that their mode will become more apparent from, and the disclosure will be better understood in itself, wherein：

Fig. 1 shows the schematic diagram of typical paperboard structure；

Fig. 2 shows the microphoto cardboard sectional view of wide ion beam technology (150X)；And

Fig. 3 shows the microphoto cardboard sectional view of the SEM C- dyeing of the cardboard of the application.

Reusability reference character is intended to indicate that the same or similar feature of the disclosure or member in the present description and drawings Part.Accompanying drawing is representative, and is not necessarily drawn to scale.Some ratios in figure may be exaggerated, and other parts are then May at utmost it be reduced.

Embodiment

Although this specification is terminated with particularly pointing out and being distinctly claimed claims of the disclosure, evidence Letter, the disclosure is better understood with by following explanation.

As used herein, " comprising " means that other steps for not influenceing final result and other compositions can be increased.The term Cover term " consist of " and " substantially by ... form ".The composition and method/technique of the disclosure may include with lower section Face, it is made up of following aspect and is substantially made up of following aspect：The fundamental of the disclosure as described herein and limitation, and Any additional or optional member, component, step or limitation as described herein.

As used herein, term " non-timber ", " no trees " and " wood substitutes " typically refer to come from crops such as wheat Stalk, wetland non-tree wood plant such as reed, water plant such as water hyacinth, microalgae such as spirulina, and seaweeds such as red algae or brown The residual processing thing of algae.The example of the non-timber natural material of the disclosure includes but is not limited to straw, rice straw, flax, mestha, bamboo Son, cotton, jute, hemp, sisal hemp, bagasse, balloonflower root, switchgrass, Chinese silvergrass, seawater or fresh water algae/marine alga, and their group Close.

As used herein, term " OCC " refers to the OCC with the coherent ply of paper of corrugated hose lining. This is the material for manufacturing corrugated fibre box (the most product of domestic recycling).

Four kinds of key components of OCC paper pulp are unbleached softwood kraft pulp (essentially from liner plate), half chemical hardwood Paper pulp (coming from reeded body paper), starch (as adhesive) and water (usually from 8% or more).

As used herein, term " paper pulp " or " paper pulp fiber " refer to obtain by conventional pulping process known in the art Fibrous material.This can be used for wood materials and non-wooden material.

As used herein, term " particulate " refers to through the part of 200 mesh sieves (75 μm).Medium sized particulate is several micro- Rice.Particulate is made up of cellulose, hemicellulose, lignin and extract.Two kinds of particulate be present：Particulate and secondary Particulate.The hereditary capacity of fine particle content seemingly plant.For bardwood pulp, a fine particle content is about 20% to about 40%, and be about 38% to about 50% for straw, a fine particle content.Secondary particulate carrys out the fiber to be fractureed during autofining The fibril fragment of outer layer.

As used herein, term " base weight " typically refers to the weight of per unit area cardboard.TAPPI used herein is surveyed Method for testing T-220 measurement base weights.The paper pulp piece that usually 30cm × 30cm or another facilitates size is weighed, is then dried to Determine solids content.It is then determined that the area of sheet material, and by the ratio j report of dry weight and sheet area be with gram/m (gsm) it is the base weight of unit.

As used herein, term " tensile figure " is represented with Nm/g, and refers to what is generally represented with Newton meter (n.m.) (N/m) The business of tensile strength divided by base weight.

As used herein, term " rupture index " refer to generally with kPa (kPa) rupture strength represented divided by generally with The business for the base weight that gram/m (gsm) is represented.

As used herein, term " ring pressure " refers to paper and cardboard to the resistance compressed along side, generally with thousand Newton/meters (kN/m) represent.

As used herein, term " compression " refers to the ability of cartons resistance external compressive force, and this is being transported with being subjected to It is relevant with the stacking intensity of the carton of the power run into during storage.It is generally represented with newton (N).

As used herein, term " side pressure " refers to the compressive strength along edge, is generally represented with thousand Newton/meters (kN/m).

As used herein, term " web forming device " generally includes fourdrinier machine shaping well known by persons skilled in the art Device, twin wire former, cylinder machine, compressing device, crescent thread form former etc..

As used herein, term " Canadian Standard Freeness " (CSF) typically refers to the speed and such as of fibre stuff discharge opeing Measured described in TAPPI standard method of test T 227OM-09.CSF unit is mL.

Fig. 1 schematically shows the structure of the cardboard of the present invention, and wherein intermediate layer 10 uses BCTMP, and the He of top layer 20 Backing layer 30 uses NBKP and LBKP.In this example embodiment, calcium carbonate is used for pressboard coating 40.The coating material being applied on top layer 20 Three times of the coating material being consequently exerted on backing layer 30.

The present invention describes replaces a part of primary long cut wood fiber in top layer 20 and backing layer 30 using bamboo.Optionally Ground, intermediate layer 10 can also use another non-wood-fiber substituted such as straw to replace.

Bamboo can be used for replacing a part of primary long wood in the top layer 20 and backing layer 30 of multilayer Bristol board structure Material fiber.Example described below has 50% to 85% bamboo in one layer.Optionally, intermediate layer 10 can also use another kind The non-wood-fiber of replacement such as straw is replaced.Examples described below includes 100% straw.Engineering properties with by all primary wood The tester that pulp fibres are formed is quite or more preferable.The cardboard can be used for product packaging, with support with current wooden cardboard phase When or may lower cost realize sustainable target.

As described above, SUS/SBS cardboards are made using primary wood fibre now.However, the continuous of long cork fibrous makes It is challenged used in economy and environment aspect.Therefore, replace the long fibre based on timber and meet still unsatisfied business demand. Long non-timber natural fiber selected from bamboo kind is generally not used in the top layer 20 and backing layer 30 of cardboard.The present disclosure describes bamboo to exist Purposes in cardboard, this is being previously unknown and unpractical.Then the paperboard sheets containing bamboo can be coated to print Brush and conversion.

Traditional SUS/SBS paperboard structures are layerings.Top layer 20 and bottom 30 use cork long fibre and the short fibre of hardwood The mixture of dimension.Intermediate layer 10 uses bleaching or unbleached chemical thermo-mechanical pulp (CTMP).Generally coating is applied to outer On surface, such as latex, kaolin or calcium carbonate.Substituting natural fiber using the non-timber of such as bamboo can replace in cardboard NBKP (top layer 20 and backing layer 30) to produce new packaging material.This disclosure relates to use bamboo or leaf of bamboo bleached kraft pulp (LBKP) and the combinations of NBKP fibers forms the multi-ply paper and board product of top layer piece and backing layer piece.The effect of this application is one Individual unexpected result -- replace primary lumber fibre using bamboo and compareing of being formed with by all Original Pulp fibers is provided Thing compares excellent engineering properties.Data display shown in the disclosure is used for the ability of product packaging using alternative fiber.

Following two files describe purposes of the bamboo in tissue paper product：

US8778505	Tissue paper product comprising bamboo
		US8524374	Tissue paper product comprising bamboo

Following two files describe purposes of the non-timber alternative fiber in container board (corrugated board)：

US2014093705	Purposes without trees fiber composition and in carton package
		US2014093704	Composite fibre composition and the purposes in carton package

A subject matter for influenceing global pulp and paper industry is due to worry the competitive purposes in forest land, forest warp The environment of battalion influence and sustainable forest management and caused by the cost of suitable lumber fibre rise steadily.In recent years, by In the sustainability problem related to market pulp, most of tissue makers have tried to explore replacing for non-timber natural fiber In generation, is using carrying out product manufacturing.Reducing the dependence to commercial wood pulp can also mitigate from NGO and like using green product Consumer pressure.It is subjected to however, being technically limited to user using the fiber of recycling in multiple product End product quality.

The fiber of recycling can derive from the fibrillation material for being collected and having again acted as in paper and production Any paper and cardboard of material.On the contrary, commercial wood pulp is classified as derive from such as dragon spruce, pine tree, fir, larch and Chinese hemlock spruce Cork trees soft wood pulp, and the hard wood pulp of the hardwood trees from such as eucalyptus, white poplar and birch.

The pulping process of non-timber natural fiber depends on raw material；Detailed step can be in Sridach, W. (2010),The Environmentally Benign Pulping Process of Non-wood Fibers, Suranaree J.Sci.Technol., 17 (2), see in 105-123.For example, red algae paper pulp can be by simply bleaching Step is processed, and its energy and fund cost are much lower, are partly because in the absence of lignin (Seo, YB etc. (2010), Red Algae and Their Use in Papermaking,Bioresource Technology,101,2549-2553)。

Using the non-timber natural fiber of replacement, such as replace timber fine using field crop fiber and agricultural residue Dimension, it is considered to be more sustainable, partly cause is the byproduct or waste that these materials are classified as other techniques.Supplier Consumer, which can be paid, helps them to dispose these materials.The example of these natural materials have mestha, flax, bamboo, cotton, Jute, hemp, sisal hemp, bagasse, cornstalk, rice straw, straw, balloonflower root, switchgrass, reed, Lu Di, seawater or fresh water algae/sea Algae or water plant such as water hyacinth.Due to including seasonal availability, chemical recovery problem, brightness of pulp, dioxide-containing silica Deng many reasons, non-wood-fiber source only accounts for the about 5-10% of global pulp yield.

Disclosure description is in carton package using at least one non-timber or the treeless paper pulp material that substitutes to replace Most conventional fibrous materials.The composition of the disclosure is included selected from least one non-wood of land natural fiber and combinations thereof Material substitutes paper pulp material.Land natural fiber can include flax, bamboo, cotton, jute, hemp, sisal hemp, bagasse, mestha, trifoliate orange Reality, switchgrass, Chinese silvergrass and combinations thereof.Single fibrous material from those nonwood materials can derive from known in the art Conventional pulping process, such as thermomechanical slurrying, brown paper slurrying (Kraft pulping), chemical pulping, enzymatic living beings slurrying or Organosolv pulping.

The non-timber that the paper pulp material composition of the disclosure can include various amounts substitutes natural pulp fiber.Said composition There can be the combination of element, at least one non-timber substitutes natural pulp fiber or it can be with wood wherein being independently present Pulp fibres combine.For example, the non-timber of the disclosure substitute natural pulp fiber amount can to account for about the 5% of composition, about 10%th, about 20%, about 25%, about 30% to about 40%, deposited to about 50%, to about 60%, to about 75%, to about 100% amount .The paper pulp material composition of the disclosure can also include with account for about the 5% of composition, about 10%, about 20% or about 30% to About 40%, to about 50%, to about 60% or the hardwood chopped fiber paper pulp of the amount to about 70%.When non-timber substitutes paper pulp material list In the presence of solely, it is combined with each other or is combined with wood pulp cellulose, is then used to said composition replace a part of conventional fibre material The carton package of material.

The composition of the disclosure can show combination, while not limited to this, wherein chemical hard wood pulp substitutes day with non-timber The ratio of right paper pulp can be about 70:30th, about 60:40th, about 50:50th, about 30:70th, about 5:95 or about 0:100.Any non-wood Material is substituted in natural pulp, and a type of non-timber can be used to substitute natural pulp or two or more combinations.

Example

Following instance will be described with and illustrate many aspects in the range of the disclosure.The example provided is merely to illustrate Property purpose, and be understood not to the limitation to the disclosure because in the case where not departing from spirit and scope of the present disclosure its Many variations are possible.As a result show that cardboard can generally be based on such as mestha, straw, Chinese silvergrass, cornstalk and bamboo The non-timber alternative fiber of son is made.The disclosure is directed to treeless cardboard, and this is with relying on OCC, hard wood pulp or the group of the two The current practice closed forms significant contrast.

General introduction

Make two groups and compare handmade paper example.Example 1 as control sample and the example 2 as invention sample are dynamic Made on state sheet formers (can be bought from Fibertech, Sweden).Example 2 is included in both top layer 20 and backing layer 30 50% bamboo and with straw replace intermediate layer 10.

● example 1 (control) Rotating fields/content is 1:1:1 (pine tree)/(fiber before consumption)/(pine tree), wherein I bar Ma Song comes from GP Cellulose, and fiber comes from Fox River Fiber (brightness before the consumption of recycling> 82.9% and freedom>482mL).

● 2 Rotating fields of example/content is 1:1:1 (50/50 pine tree/bamboo)/(straw)/(50/50 pine tree/bamboo).

It was observed that benefit：All engineering properties are all quite or more preferable compared with the tester of example 1.The displaying bag of example 2 Include the mechanical strength of ZD stretchings and the enhancing of hardness.This is surprising, because substituting the presence of non-wood-fiber generally not The engineering properties of combination board is influenceed sharply.

Example 3 as control sample and the example 4 as invention sample commercial paper machine (Shandong Province of China Yanzhou IP-Sun made on).Example 4 is included in 75% bamboo in top layer 20 and 85% bamboo in backing layer.

● example 3 (control) is commercially available StarBlanc C1S Ivory Board.Its Rotating fields is about 1:4:1 (two kinds The kraft pulp NBKP/LBKP of type blend)/(two kinds of mechanical pulp APMP/BCTMP and Broke blending Thing)/(two kinds of kraft pulp NBKP/LBKP blend).It is applied on both sides.Detail sees below.

● the Rotating fields of example 4 are about 1:4:1 (25/75NBKP/ bamboos)/(with identical intermediate layer in example 3)/(15/ 85NBKP/ bamboos).It is also similarly coated on both sides.

It was observed that benefit：All engineering properties are all quite or more preferable compared with the tester of example 3.The folding of example 4 Intensity is more much better than the tester of example 3.The smoothness of example 4 is smaller than the half of the value of control sample, but still water needed for ratio It is flat much higher.

Material

Xiamen Jian Fa limited company (Xiamen C＆D Paper＆Pulp Co., Ltd.in of the bamboo pulp from Chinese Xiamen Xiamen, China) purchase.Northern bleached kraft starches (NBKP) by such as by Ma Song (Masson pine), larch, pine tree With dragon spruce slurrying made of the cork fibrous of those fibers be made.Leaf bleached kraft pulp (LBKP) by such as by birch, willow, The hardwood fiber of linden, maple and those fibers made of eucalyptus slurrying is made.These materials from Helsinki, Finland's UPM Uruguay are bought.BCTMP SW paper pulp is from Napier, New Zealand Panpac Forest Products, Ltd. Purchase.Alkaline peroxide mechanical paper pulp (APMP) is made a concerted effort Paper Co., Ltd (Yanzhou Heli from the Yanzhou in Chinese Yanzhou Paper Industry Co., Ltd.in Yanzhou, China) purchase.Broke recyclings from production process.Glue Breast, clay and the calcium carbonate of grinding use as the coating material of production.

Fiber (Fox River Fiber, De Pere, WI), the straw (mountain of Jinan China before the consumption of recycling Dong Jiang paper Co., Ltd (Shandong Pulp and Paper Co.Ltd., Jinan, China) and Alabama pine (GP Cellulose, Atlanta, GA) it be used to manufacture three layers of handmade paper using dynamic handsheet former.

Equipment

Inventive samples are manufactured using the IP-Sun in Shandong Province of China Yanzhou paper machine (PM 18).Cardboard after trimming is wide Spend for 3350mm.PM 18 is equipped with four electric wires (top layer piece, bottom chip, filling synusia and backing layer piece).

Using dynamic sheet formers (Fibertech, Sweden) by by raw material (pulp density be 0.5% or smaller) from On the super thick transfer filter paper that mixing pit is pumped into above rotary drum (1450rpm) to the woven wire in 100 mesh through horizontal nozzle, discharge Raw material is suppressed (20PSI) and dyed sheet material at 150 DEG C, forming layer official form for filing a lawsuit piece to form sheet material.Can before pumping The fiber of each layer and the amount of additive (if you are using) are controlled in mixing pit.

Example 1

The control board sample is respectively containing 1/3 top layer 20 (pine tree) and middle 1/3 filler (fiber before consumption) and 1/3 Backing layer 30 (pine tree).It is formed using dynamic sheet formers.The fibre weight of each layer is according to 60 pounds/1000 square feet (about 300g/m²) target paperboard base determine again, and the suspension (0.5% or smaller) of dilution is prepared in mixing pit, And it is pumped into through horizontal nozzle on the super thick transfer filter paper in rotary drum.Dry the wet paperboard pressurization of formation and at 150 DEG C About 10 minutes.Test result is shown in Table 1, and it can be used for compared with the sample of example 2.

Example 2

As shown in table 1, the sample of example 2 is used for the pine tree fiber and bamboo fiber of top layer 20 and backing layer 30 not It is made with combination.However, intermediate layer 10 is replaced by straw completely.The write by hand paper substrate weight and size of example 2 are identical with example 1, but It is the desired value that thickness is more than 16 points.

By handmade paper regulation and control at temperature (23 ± 1 DEG C) and humidity (50 ± 2%) it is at least overnight, and test thickness (TAPPI T411), base weight (TAPPI T410), stretching (TAPPI T220), ZDT stretchings (TAPPI T541), ring pressure (T818), Maron rupture (Mullen burst) (TAPPI T807) and STFI (T826).Test repeats at least three times (n=3) To produce the average value for the report of each parameter.All engineering properties compared with the tester shown in example 1 all quite or more It is good.It is particularly surprising that 100% straw in intermediate layer 10 shows the mechanical strength of enhancing, such as ZD stretchings and hard Degree.Hardness is the most important parameter of cardboard, because it influences carton machine that smoothly process is erect, filled and closed Ability.Generally, the presence of non-timber alternative fiber will negatively affect the engineering properties of combination board.

1 three layers of handmade paper engineering properties of table

Example 3

The example uses business board sample StarBlanc C1S Ivory board as control sample.It has with Identical multi-layer composition described in Fig. 1.However, all fibres used in control sample are all Original Pulps, wherein in Interbed 10 is made up of 35%APMP, 30%BCTMP and 35%broke.Top layer 20 and backing layer 30 be 15% to 25%NBKP and 75% to 85%LBKP.There is three layer coating in cardboard front, and reverse side has one layer of coating.Target basis weight is 300g/m².Intermediate layer 10 Distribution of weight be about 58-65%, the distribution of weight of top layer 20 is 14-15%, and the distribution of weight of backing layer is 11-12%.Its Remaining is coating.Control cardboard test parameter is listed in Table 2 below.

Example 4

In this example a part of Original Pulp in top layer 20 and backing layer 30 is replaced using bamboo pulp.Top layer 20 uses 25%NBKP and 75% bamboo.Backing layer 30 uses 15%NBKP and 85% bamboo.Manufactured cardboard is in check on PM18 Tested under temperature (23 ± 1 DEG C) and relative humidity (50 ± 2%).As a result it is shown in table 2.Compared with control sample, fold Strength ratios comparison sample is much better, and smoothness is about the 1/2 of control sample.Required smoothness be at least 100 or 150 and with On scope in.

These ratio of fibers can change and still within the scope of the present invention.For example, top layer 20 can use 50% bamboo Son and 50%LBKP.Or backing layer 30 can use 30% bamboo and 70%LBKP, while keep intermediate layer 10 identical.

Table 2 compares and sample cardboard test result

Example 5

Board sample from example 4 is arranged on MVAScientific Consultant (Duluth, GA) and cut It is cut into wide ion beam (BIB) section of viewgraph of cross-section.BIB cross sections are to prepare the advanced of accurate cross section for various materials Method.Compared with the conventional method such as mechanical polishing or slicer, BIB is to soft material, stone material, porous material The combination of material or these materials carries out having advantage during cross section.BIB cross-sectional surfaces product is about 1 mm wide, and hundreds of is micro- Rice is long.Ion beam can cut cardboard without making its deformation or filling pore.This allows to study pore structure in detail, example Such as, the filler of such as calcium carbonate by penetrate into porous coating depth how.

Sample is cut first and is trimmed to suitable size and shape.Then the sample for serving as mask plate is attached it to On frame (titanium).The sub-fraction (20-200 μm) of sample is visible above mask edge.Wide ar-ion beam hangs down at the edge of mask In line row so that half light beam hits sample, and second half hits mask.Ion starts to remove de-material from the visibility region of sample Material, and mask plate protection remainder.Over time, Ions Bombardment produces cleaning of the sample behind mask plate edge Planar cross-sectional area.As shown in Figure 2, thick white layer is three layers of calcium carbonate coating, and thin layer is one layer of calcium carbonate coating. BCTMP few fibers are in intermediate hierarchical and are hollow.Top layer 20 and backing layer 30 are the mixed of fiber based on timber and bamboo fibre Compound.These observation results are further demonstrated in figure 3, and wherein SEM C- dyeing is (yellow in the middle BCTMP for showing lignifying Color), and delignified fiber and bamboo fibre based on timber are shown in top layer 20 and backing layer 30.It is further, it is seen that fine The density of dimension changes on calliper.

Except as otherwise noted, otherwise all percentage, number and ratio is all based on the gross weight of disclosure composition. Except as otherwise noted, otherwise all these weight on ingredients listed are based on active level, and therefore do not include can With the solvent or accessory substance included in commercially available material.Term " percentage by weight " can be denoted herein as " wt.% ".% ".Unless provide the place of the specific example of actual measured value, the numerical value being otherwise mentioned above should by regarding To be limited by term " about ".

Dimensions and values disclosed herein is not understood as being strictly limited to the exact described exact numerical.It is on the contrary, unless another Indicate outside, otherwise each such size is intended to indicate that described value and the functionally equivalent scope around the value.It is for example, open Size for " 40mm " is intended to indicate that " about 40mm ".

The All Files quoted in " embodiment " is herein incorporated by reference in the part of correlation；It is right The reference of any file is not necessarily to be construed as recognizing that it is the prior art on the disclosure.Term in this written document Any implication or in the case that definition conflicts with any implication of the term in the file being incorporated by reference or definition, answer It is defined when by the implication or definition for assigning the term in this written document.

Although having been shown and describing the particular aspects of the disclosure, those skilled in the art will become apparent to It is that various other change and modifications can be made in the case of without departing substantially from spirit and scope of the present disclosure.Therefore, in appended power It is intended to cover in sharp claim all to change and modifications as in the range of the disclosure.

Claims

1. a kind of paperboard packaging material, it includes：

Include the top layer for the non-wood-fiber being blended with lumber fibre, wherein the non-wood-fiber account for the 5% of the top layer to 100%；

Include the backing layer for the non-wood-fiber being blended with lumber fibre, wherein the non-wood-fiber account for the 5% of the backing layer to 100%；And

The intermediate layer being arranged between the top layer and the backing layer.

2. paperboard packaging material according to claim 1, wherein the intermediate layer includes 5% to 100% non-timber filler Fiber.

3. paperboard packaging material according to claim 2, wherein the non-timber filler fibre be selected from cornstalk, stalk, Other land natural fibers and combinations thereof.

4. paperboard packaging material according to claim 3, wherein the stalk be selected from wheat, rice, oat, barley, rye, Flax, grass and combinations thereof.

5. paperboard packaging material according to claim 3, wherein other described land natural fibers be selected from flax, bamboo, Cotton, jute, hemp, sisal hemp, bagasse, mestha, the dried immature fruit of citron orange, switchgrass, Chinese silvergrass and combinations thereof.

6. paperboard packaging material according to claim 2, wherein the non-timber filler fibre is straw.

7. paperboard packaging material according to claim 1, wherein the non-wood-fiber is bamboo.

8. paperboard packaging material according to claim 1, its be additionally included in one of the top layer and the backing layer or Coating on both.

9. paperboard packaging material according to claim 8, wherein the coating is selected from latex, kaolin and calcium carbonate.

10. paperboard packaging material according to claim 1, wherein the non-wood-fiber account for the 50% of the top layer to 85%.

11. paperboard packaging material according to claim 1, wherein the non-wood-fiber account for the 50% of the backing layer to 85%.

12. a kind of paperboard packaging material, it includes：

Include the top layer for the non-wood-fiber being blended with lumber fibre, wherein the non-wood-fiber account for the 50% of the top layer to 85%, wherein the non-wood-fiber is bamboo；

Include the backing layer for the non-wood-fiber being blended with lumber fibre, wherein the non-wood-fiber account for the 50% of the backing layer to 85%, wherein the non-wood-fiber is bamboo；And

13. paperboard packaging material according to claim 12, wherein the intermediate layer is filled out comprising 5% to 100% non-timber Expect fiber.

14. paperboard packaging material according to claim 13, wherein the non-timber filler fibre is selected from cornstalk, straw Stalk, other land natural fibers and combinations thereof.

15. paperboard packaging material according to claim 13, wherein the stalk is selected from wheat, rice, oat, barley, black Wheat, flax, grass and combinations thereof.

16. paperboard packaging material according to claim 13, wherein other described land natural fibers are selected from flax, bamboo Son, cotton, jute, hemp, sisal hemp, bagasse, mestha, the dried immature fruit of citron orange, switchgrass, Chinese silvergrass and combinations thereof.

17. paperboard packaging material according to claim 13, wherein the non-timber filler fibre is straw.

18. a kind of paperboard packaging material, it includes：

The intermediate layer being arranged between the top layer and the backing layer, wherein the intermediate layer includes 5% to 100% non-timber Filler fibre.

19. paperboard packaging material according to claim 18, wherein the non-timber filler fibre is straw.